FN Thomson Reuters Web of Science™ VR 1.0 PT B AU Wasden, DL Loera, JA Majid, AJ Moradi, H Farhang-Boroujeny, B AF Wasden, Daryl Leon Loera, Jose Alberto Majid, Arslan Javaid Moradi, Hussein Farhang-Boroujeny, Behrouz GP IEEE TI Design and Implementation of an Underlay Control Channel for Cognitive Radios SO 2012 IEEE INTERNATIONAL SYMPOSIUM ON DYNAMIC SPECTRUM ACCESS NETWORKS LA English DT Proceedings Paper CT IEEE International Symposium on Dynamic Spectrum Access Networks CY OCT 16-19, 2012 CL Bellevue, WA SP IEEE ID NETWORKS; CDMA C1 [Wasden, Daryl Leon; Majid, Arslan Javaid; Farhang-Boroujeny, Behrouz] Univ Utah, ECE Dept, Salt Lake City, UT 84112 USA. [Moradi, Hussein] Idaho Natl Lab, Idaho Falls, ID USA. RP Wasden, DL (reprint author), Univ Utah, ECE Dept, Salt Lake City, UT 84112 USA. NR 14 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-4448-7; 978-1-4673-4447-0 PY 2012 BP 280 EP + PG 2 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BFN91 UT WOS:000320661800035 ER PT B AU Deaton, JD Benonis, M DaSilva, L Irwin, RE AF Deaton, Juan D. Benonis, Mike DaSilva, Luiz Irwin, Ryan E. GP IEEE TI Supporting Dynamic Spectrum Access In Heterogeneous LTE plus Networks SO 2012 IEEE INTERNATIONAL SYMPOSIUM ON DYNAMIC SPECTRUM ACCESS NETWORKS LA English DT Proceedings Paper CT IEEE International Symposium on Dynamic Spectrum Access Networks CY OCT 16-19, 2012 CL Bellevue, WA SP IEEE AB With Long Term Evolution Advanced (LTE+) networks likely as the future one world 4G standard, network operators may need to deploy a Dynamic Spectrum Access (DSA) overlay in Heterogeneous Networks (HetNets) to extend coverage, increase spectrum efficiency, and increase the capacity of these networks. In this paper, we propose three new management frameworks for DSA in an LTE+ HetNet: Spectrum Accountability Client, Cell Spectrum Management, and Domain Spectrum Management. For these spectrum management frameworks, we define protocol interfaces and operational signaling scenarios to support cooperative sensing, spectrum lease management, and alarm scenarios for rule adjustment. We also quantify, through integer programs, the benefits of using DSA in an LTE+ HetNet that can opportunistically reuse vacant TV and GSM spectrum. Using integer programs, we consider a topology using Geographic Information System data from the Blacksburg, VA metro area to assess the realistic benefits of DSA in an LTE+ HetNet. C1 [Deaton, Juan D.] Idaho Natl Lab, N&HS Directorate, Idaho Falls, ID 83415 USA. [Benonis, Mike] Virginia Tech, Bradley Dept ECE, Blacksburg, VA USA. [DaSilva, Luiz] CTVR, Trinity Coll, Dublin, Ireland. [Irwin, Ryan E.] Raytheon BBN Technol, Adv Network Syst, Cambridge, MA USA. RP Deaton, JD (reprint author), Idaho Natl Lab, N&HS Directorate, Idaho Falls, ID 83415 USA. FU Idaho National Laboratory (INL) Ph.D. Candidate Program; Virginia Tech Bradley Fellowship; Laboratory Directed Research & Development (LDRD) Program under DOE Idaho Operations Office [DE-AC07-05ID14517] FX This work supported by the Idaho National Laboratory (INL) Ph.D. Candidate Program and Virginia Tech Bradley Fellowship. Work supported through the INL is supported through the Laboratory Directed Research & Development (LDRD) Program under DOE Idaho Operations Office Contract DE-AC07-05ID14517. NR 28 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-4448-7; 978-1-4673-4447-0 PY 2012 BP 305 EP 316 PG 12 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BFN91 UT WOS:000320661800045 ER PT S AU Henderson, MG AF Henderson, M. G. BE Keiling, A Donovan, E Bagenal, F Karlsson, T TI Auroral Substorms, Poleward Boundary Activations, Auroral Streamers, Omega Bands, and Onset Precursor Activity SO AURORAL PHENOMENOLOGY AND MAGNETOSPHERIC PROCESSES: EARTH AND OTHER PLANETS SE Geophysical Monograph Series LA English DT Proceedings Paper CT Chapman Conference on the Relationship Between Auroral Phenomenology and Magnetospheric Processes CY FEB 27-MAR 04, 2011 CL Fairbanks, AK SP Natl Sci Fdn, Univ Calgary ID BURSTY BULK FLOWS; PLASMA SHEET; EXPANSION; MAGNETOTAIL; INTENSIFICATIONS; PRECIPITATION; ASSOCIATION; CONVECTION; SPACECRAFT; IMAGER AB We show that poleward boundary intensifications and auroral streamers can evolve into auroral torches and omega bands. We show that quasiperiodic generation of streamers near a given magnetic local time region can produce a quasiperiodic train of auroral torches that successively drift eastward to create an omega band structure. We also show that subsequent streamers can create new torches "on top" of an existing omega band form. These observations explain a number of previously unexplained features of omega bands. In addition, we show that while auroral streamer activity does not typically lead to substorm onsets, streamers can occur prior to auroral onsets, although in such cases, they are usually not colocated with the onset region. Interpreting the auroral streamers as ionospheric manifestations of bursty bulk flows in the tail (due to earthward propagation of low-entropy flux tubes), we surmise that flow braking cannot, by itself, be the cause of the auroral breakup and subsequent expansion. C1 Los Alamos Natl Lab, ISR 1, Los Alamos, NM 87544 USA. RP Henderson, MG (reprint author), Los Alamos Natl Lab, ISR 1, POB 1663, Los Alamos, NM 87544 USA. EM mghenderson@lanl.gov RI Henderson, Michael/A-3948-2011 OI Henderson, Michael/0000-0003-4975-9029 NR 49 TC 10 Z9 10 U1 2 U2 11 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0065-8448 BN 978-0-87590-487-0 J9 GEOPHYS MONOGR SER PY 2012 VL 197 BP 39 EP 54 DI 10.1029/2011GM001165 PG 16 WC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences; Physics, Applied SC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences; Physics GA BFJ22 UT WOS:000320090100003 ER PT S AU Birn, J Schindler, K Hesse, M AF Birn, J. Schindler, K. Hesse, M. BE Keiling, A Donovan, E Bagenal, F Karlsson, T TI Magnetotail Aurora Connection: The Role of Thin Current Sheets SO AURORAL PHENOMENOLOGY AND MAGNETOSPHERIC PROCESSES: EARTH AND OTHER PLANETS SE Geophysical Monograph Book Series LA English DT Proceedings Paper CT Chapman Conference on the Relationship Between Auroral Phenomenology and Magnetospheric Processes CY FEB 27-MAR 04, 2011 CL Fairbanks, AK SP Natl Sci Fdn (NSF), Univ Calgary ID INTENSE ELECTRIC-FIELDS; PLASMA SHEET; PARTICLE-ACCELERATION; MAGNETIC RECONNECTION; CLUSTER; EQUILIBRIUM; CONVECTION; LOCATION; MODELS; REGION AB Connections between magnetotail structure and dynamics and auroral forms are investigated on the basis of fluid and particle simulations, as well as Vlasov theory. Our focus is on possible mechanisms to generate or enhance perpendicular electric fields associated with quasistatic electric potentials of "U" shape or "S" shape, relevant for auroral arcs. At small scales (less than 10 km), such electric fields are associated with Hall currents and electron E x B drift rather than plasma flow shear, indicating the relevance of thin current sheets as possible source regions. Two-dimensional and 3-D MHD theory and simulations demonstrate that moderate deformations of the magnetotail may lead to critical states characterized by the loss of neighboring equilibrium and the formation of thin current sheets embedded in the wider plasma sheet. This provides a suitable scenario for the onset of reconnection in the tail, as well as a potential mechanism to generate or intensify auroral arcs, even prior to the onset of reconnection. Particle-in-cell simulations confirm this mechanism and further demonstrate that thin embedded electron current sheets may form from moderate compression, as well as expansion, of a thicker current sheet. This suggests that such structures might be more typical for the tail current sheet than a smooth solution and may represent a possible source region for quiescent arcs within the plasma sheet footpoint region and at the plasma sheet/polar cap boundary. One-dimensional Vlasov models of such structures indicate association with either S- or U-shaped potentials (and intermediate structures), depending on the magnitude of the magnetic field jump and the plasma beta. C1 [Birn, J.] Space Sci Inst, Boulder, CO 80301 USA. [Birn, J.] Los Alamos Natl Lab, Los Alamos, NM USA. [Schindler, K.] Ruhr Univ Bochum, Inst Theoret Phys, Bochum, Germany. [Hesse, M.] NASA Goddard Space Flight Ctr, Greenbelt, MD USA. RP Birn, J (reprint author), Space Sci Inst, Boulder, CO 80301 USA. EM jbirn@spacescience.org RI NASA MMS, Science Team/J-5393-2013 OI NASA MMS, Science Team/0000-0002-9504-5214 FU US Depanment of Energy; NASA's MMS/SMART Theory; Modeling and SRT Programs FX This work was performed under the auspices of the US Depanment of Energy, supported by NASA's MMS/SMART Theory and Modeling and SR&T Programs. NR 44 TC 3 Z9 3 U1 1 U2 4 PU AMER GEOPHYSICAL UNION PI WASHINGTON PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA SN 0065-8448 BN 978-0-87590-487-0 J9 GEOPHYS MONOGR SER PY 2012 VL 197 BP 337 EP + DI 10.1029/2011GM001182 PG 3 WC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences; Physics, Applied SC Geochemistry & Geophysics; Meteorology & Atmospheric Sciences; Physics GA BFJ22 UT WOS:000320090100029 ER PT J AU Kubas, GJ AF Kubas, Gregory J. TI The Art and Beauty of Inorganic Synthesis on the Path to Discovery: Transition Metal Coordination and Activation of Sulfur Dioxide and Dihydrogen SO COMMENTS ON INORGANIC CHEMISTRY LA English DT Article DE activation of dihydrogen; dihydrogen complexes; heterolytic cleavage of dihydrogen; hydrogenase; sigma bond complex; sulfur dioxide complexes ID MOLECULAR-HYDROGEN COMPLEXES; HYDRIDE COMPLEXES; CONFORMATIONAL PREFERENCES; ROTATIONAL BARRIERS; H-2 PRODUCTION; SOLAR-ENERGY; SIGMA-BONDS; H-H; 1ST; REACTIVITY AB Transition metal compounds often possess spectacular gem-like colors and crystallinity that have attracted quite a few individuals to careers in chemistry. This was especially true for myself when I carried out undergraduate research in John Fackler's laboratory and I began to appreciate the art and beauty of inorganic synthesis. These facets were invaluable later on in my discovery of both new types of sulfur dioxide complexes and especially dihydrogen complexes where keen observation of reaction colors was key to uncovering reversible binding of H-2 to Mo/W complexes. Synthesis can be as much art as science, and the factors leading to the discovery of dihydrogen complexes will be a major focus of this article. The key structure/bonding/reactivity features and importance of metal-H-2 binding in the development of hydrogen as a future fuel will also be discussed. Coordination of H-2 facilitates its heterolytic cleavage, a key process in metalloenzymes such as hydrogenases that provide valuable models for the microscopic reverse, biomimetic formation of H-2 from protons and electrons. Coupling this with photochemistry would be key to production of so-called solar fuels. C1 [Kubas, Gregory J.] Los Alamos Natl Lab, Los Alamos, NM USA. RP Kubas, GJ (reprint author), 53 Ave Las Nubes, Santa Fe, NM 87508 USA. EM gkubas1@comcast.net NR 54 TC 4 Z9 4 U1 2 U2 23 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0260-3594 EI 1548-9574 J9 COMMENT INORG CHEM JI Comments Inorganic Chem. PY 2012 VL 33 IS 3-4 SI SI BP 102 EP 121 DI 10.1080/02603594.2013.772896 PG 20 WC Chemistry, Inorganic & Nuclear SC Chemistry GA 161IL UT WOS:000320186200003 ER PT B AU Dolphin, BH Richins, WD Novascone, SR AF Dolphin, B. H. Richins, W. D. Novascone, S. R. GP ASME TI Automating Risk Assessments of Hazardous Material Shipments for Transportation Routes and Mode Selection SO PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION 2010, VOL 13 LA English DT Proceedings Paper CT ASME International Mechanical Engineering Congress and Exposition (IMECE) CY NOV 12-18, 2010 CL Vancouver, CANADA SP Amer Soc Mech Engineers AB The METEOR (Model to Evaluate Transportation Effects of Risk) project at Idaho National Laboratory (INL) successfully addresses the difficult problem in risk assessment analyses of combining the results from bounding deterministic simulation results with probabilistic (Monte Carlo) risk assessment techniques. This paper describes a software suite designed to perform sensitivity and cost/benefit analyses on selected transportation routes and vehicles to minimize risk associated with the shipment of hazardous materials. METEOR uses Monte Carlo techniques to estimate the probability of an accidental release of a hazardous substance along a proposed transportation route. A METEOR user selects the mode of transportation, origin and destination points, and charts the route using interactive graphics. Inputs to METEOR (many selections built in) include crash rates for the specific aircraft, soil/rock type and population densities over the proposed route, and bounding limits for potential accident types (velocity, temperature, etc.). New vehicle, materials, and location data are added when available. If the risk estimates are unacceptable, the risks associated with alternate transportation modes or routes can be quickly evaluated and compared. Systematic optimizing methods will provide the user with the route and vehicle selection identified with the lowest risk of hazardous material release. The effects of a selected range of potential accidents such as vehicle impact, fire, fuel explosions, excessive containment pressure, flooding, etc. are evaluated primarily using hydrocodes capable of accurately simulating the material response of critical containment components. Bounding conditions that represent credible accidents (i.e., for an impact event, velocity, orientations, and soil conditions) are used as input parameters to the hydrocode models yielding correlation functions relating accident parameters to component damage. The Monte Carlo algorithms use random number generators to make selections at the various decision points such as crash, location, etc. For each pass through the routines, when a crash is randomly selected, crash parameters are then used to determine if failure has occurred using either external look up tables, correlations functions from deterministic calculations, or built in data libraries. The effectiveness of the software was recently demonstrated in safety analyses of the transportation of radioisotope systems for the US Dept. of Energy. These methods are readily adaptable to estimating risks associated with a variety of hazardous shipments such as spent nuclear fuel, explosives, and chemicals. C1 [Dolphin, B. H.; Richins, W. D.; Novascone, S. R.] Idaho Natl Lab, Idaho Falls, ID 83415 USA. RP Dolphin, BH (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA. EM Barbara.Dolphin@inl.gov; William.Richins@inl.gov; Stephen.Novascone@inl.gov NR 3 TC 0 Z9 0 U1 2 U2 4 PU AMER SOC MECHANICAL ENGINEERS PI NEW YORK PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA BN 978-0-7918-4450-2 PY 2012 BP 59 EP 63 PG 5 WC Engineering, Mechanical SC Engineering GA BFJ73 UT WOS:000320140700008 ER PT B AU Lai, K Sun, X Dasch, C AF Lai, K. Sun, X. Dasch, C. GP ASME TI Quantify Resonance Inspection with Finite-Element-Based Modal Analyses SO PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION 2010, VOL 13 LA English DT Proceedings Paper CT ASME International Mechanical Engineering Congress and Exposition (IMECE) CY NOV 12-18, 2010 CL Vancouver, CANADA SP Amer Soc Mech Engineers DE Resonance Inspection; Acoustics; Finite Element Modal Analysis AB Resonance inspection uses the natural acoustic resonances of a part to identify anomalous parts. Modern instrumentation can measure the many resonant frequencies rapidly and accurately. Sophisticated sorting algorithms trained on sets of good and anomalous parts can rapidly and reliably inspect and sort parts. This paper aims at using finite-element-based modal analysis to put resonance inspection on a more quantitative basis. A production-level automotive steering knuckle is used as the example part for our study. First, the resonance frequency spectra for the knuckle are measured with two different experimental techniques. Next, scanning laser vibrometry is used to determine the mode shape corresponding to each resonance. The material properties including anisotropy are next measured to high accuracy using resonance spectroscopy on cuboids cut from the part. Then, finite element model (FEM) of the knuckle is generated by meshing the actual part geometry obtained with computed tomography (CT). The resonance frequencies and mode shapes are next predicted with a natural frequency extraction analysis after extensive mesh size sensitivity study. The good comparison between the predicted and the experimentally measured resonance spectra indicate that finite-element-based modal analyses have the potential to be a powerful tool in shortening the training process and improving the accuracy of the resonance inspection process for a complex, production level part. The finite element based analysis can also provide a means to computationally test the sensitivity of the frequencies to various possible defects such as porosity or oxide inclusions especially in the high stress regions that the part will experience in service. C1 [Lai, K.; Sun, X.] Pacific NW Natl Lab, Richland, WA USA. [Dasch, C.] Highwood Technol LLC, Bloomfield, MI USA. RP Lai, K (reprint author), Pacific NW Natl Lab, Richland, WA USA. FU Department of Energy National Energy Technology Laboratory [DE-FCO5-020R22910, DE-FC26-020R22910]; Pacific Northwest National Laboratory; United States Department of Energy [DE-ACO5-76RL01830] FX This material is based upon work supported by the Department of Energy National Energy Technology Laboratory under Award Numbers DE-FCO5-020R22910 and DE-FC26-020R22910. This work is a collaboration with USAMP NDE701 project, and the authors would like to acknowledge the contributions of George Harmon and Martin Jones to the experimental results presented in this paper. Pacific Northwest National Laboratory is operated by Battelle for the United States Department of Energy under Contract DE-ACO5-76RL01830. NR 10 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC MECHANICAL ENGINEERS PI NEW YORK PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA BN 978-0-7918-4450-2 PY 2012 BP 353 EP + PG 2 WC Engineering, Mechanical SC Engineering GA BFJ73 UT WOS:000320140700045 ER PT B AU Goettler, D Su, M Olsson, R El-Kady, I Leseman, Z AF Goettler, Drew Su, Mehmet Olsson, Roy, III El-Kady, Ihab Leseman, Zayd GP ASME TI nanoFIBrication OF A TWO-DIMENSIONAL PHONONIC CRYSTAL IN A FREE STANDING MEMBRANE SO PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION 2010, VOL 13 LA English DT Proceedings Paper CT ASME International Mechanical Engineering Congress and Exposition (IMECE) CY NOV 12-18, 2010 CL Vancouver, CANADA SP Amer Soc Mech Engineers ID BEAM; FABRICATION AB A two-dimensional phononic crystal (PnC) that can operate in the GHz range is created in a freestanding silicon substrate using NanoFIBrication (using a focused ion beam (FIB) to fabricate nanostructures). First, a simple cubic 6.75 x 6.75 mu m array of vias with 150 nm spacing is generated. After patterning the vias, they are backfilled with void-free tungsten scatterers. Each via has a diameter of 48 nm. Numerical calculations predict this 2D PnC will generate a band gap near 22 GHz. A protective layer of chromium on top of the thin (100 nm) silicon membrane confines the surface damage to the chromium, which can be removed at a later time. Inspection of the underside of the membrane shows the vias flaring out at the exit, which we are dubbing the 'trumpet effect'. The trumpet effect is explained by modeling the lateral damage in a freestanding membrane. C1 [Goettler, Drew; Su, Mehmet; Leseman, Zayd] Univ New Mexico, Albuquerque, NM 87131 USA. [Olsson, Roy, III; El-Kady, Ihab] Sandia Natl Labs, Albuquerque, NM USA. RP Goettler, D (reprint author), Univ New Mexico, Albuquerque, NM 87131 USA. FU Laboratory Directed Research and Development program at Sandia National Laboratories; United States Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000] FX This work was supported by the Laboratory Directed Research and Development program at Sandia National Laboratories. Sandia National Laboratories is a multiprogram laboratory operated by the Sandia Corporation, Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under Contract No. DE-AC04-94AL85000. This work was completed in part at the University of New Mexico Manufacturing Training and Technology Center. NR 19 TC 0 Z9 0 U1 0 U2 2 PU AMER SOC MECHANICAL ENGINEERS PI NEW YORK PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA BN 978-0-7918-4450-2 PY 2012 BP 383 EP + PG 3 WC Engineering, Mechanical SC Engineering GA BFJ73 UT WOS:000320140700049 ER PT B AU Su, M Reinke, C Soliman, Y Leseman, Z Olsson, R El-Kady, I AF Su, Mehmet Reinke, Charles Soliman, Yasser Leseman, Zayd Olsson, Roy, III El-Kady, Ihab GP ASME TI EFFECT OF RELEASE HOLES ON MICRO-SCALE SOLID-SOLID PHONONIC CRYSTALS SO PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION 2010, VOL 13 LA English DT Proceedings Paper CT ASME International Mechanical Engineering Congress and Exposition (IMECE) CY NOV 12-18, 2010 CL Vancouver, CANADA SP Amer Soc Mech Engineers ID ACOUSTIC-WAVES; GUIDES; BAND AB Solid-solid phononic crystals (solid inclusions in a solid matrix) exhibit wider bandgaps than those observed with air-solid phononic crystals (air inclusions in a solid matrix). In a solid-solid phononic crystal operating in the low MHz range, it is essential to place release holes in the center of the inclusions to release devices from the substrate. It is necessary to release, and therefore suspend the phononic crystal to avoid propagation losses through the substrate. In this report we investigate the effect of release holes on phononic bandgaps and highlight the need for careful design to avoid compromising the phononic bandgap. Studying release issues for solid-solid phononic crystals is essential for the successful fabrication of such devices. C1 [Su, Mehmet; Soliman, Yasser; Leseman, Zayd] Univ New Mexico, Albuquerque, NM 87131 USA. [Reinke, Charles; Olsson, Roy, III; El-Kady, Ihab] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. RP Su, M (reprint author), Univ New Mexico, Albuquerque, NM 87131 USA. NR 22 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC MECHANICAL ENGINEERS PI NEW YORK PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA BN 978-0-7918-4450-2 PY 2012 BP 395 EP + PG 2 WC Engineering, Mechanical SC Engineering GA BFJ73 UT WOS:000320140700051 ER PT B AU McKellar, MG Harvego, EA Gandrik, AM AF McKellar, M. G. Harvego, E. A. Gandrik, A. M. GP ASME TI ANALYSIS OF A HIGH TEMPERATURE GAS-COOLED REACTOR POWERED HIGH TEMPERATURE ELECTROLYSIS HYDROGEN PLANT SO PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION - 2010, VOL 5, PTS A AND B LA English DT Proceedings Paper CT ASME International Mechanical Engineering Congress and Exposition (IMECE) CY NOV 12-18, 2010 CL Vancouver, CANADA SP Amer Soc Mech Engineers AB An updated reference design for a commercial-scale high-temperature electrolysis (HTE) plant for hydrogen production has been developed. The HTE plant is powered by a high-temperature gas-cooled reactor (HTGR) whose configuration and operating conditions are based on the latest design parameters planned for the Next Generation Nuclear Plant (NGNP). The current HTGR reference design specifies a reactor power of 600 MWt, with a primary system pressure of 7.0 MPa, and reactor inlet and outlet fluid temperatures of 322 degrees C and 750 degrees C, respectively. The reactor heat is used to produce heat and electric power for the HTE plant. A Rankine steam cycle with a power conversion efficiency of 44.4% was used to provide the electric power. The electrolysis unit used to produce hydrogen includes 1.1 million cells with a per-cell active area of 225 cm(2). The reference hydrogen production plant operates at a system pressure of 5.0 MPa, and utilizes a steam-sweep system to remove the excess oxygen that is evolved on the anode (oxygen) side of the electrolyzer. The overall system thermal-to-hydrogen production efficiency (based on the higher heating value of the produced hydrogen) is 42.8% at a hydrogen production rate of 1.85 kg/s (66 million SCFD) and an oxygen production rate of 14.6 kg/s (33 million SCFD). An economic analysis of this plant was performed with realistic financial and cost estimating The results of the economic analysis demonstrated that the HTE hydrogen production plant driven by a high-temperature helium-cooled nuclear power plant can deliver hydrogen at a competitive cost. A cost of $3.03/kg of hydrogen was calculated assuming an internal rate of return of 10% and a debt to equity ratio of 80%/20% for a reactor cost of $2000/kWt and $2.41/kg of hydrogen for a reactor cost of $1400/kWt. C1 [McKellar, M. G.; Harvego, E. A.; Gandrik, A. M.] Idaho Natl Lab, Idaho Falls, ID 83415 USA. RP McKellar, MG (reprint author), Idaho Natl Lab, Idaho Falls, ID 83415 USA. NR 13 TC 0 Z9 0 U1 0 U2 1 PU AMER SOC MECHANICAL ENGINEERS PI NEW YORK PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA BN 978-0-7918-4429-8 PY 2012 BP 865 EP 873 PG 9 WC Energy & Fuels; Engineering, Mechanical SC Energy & Fuels; Engineering GA BFN51 UT WOS:000320625800094 ER PT B AU Brochard, D Tomoyo, T Ma, DC AF Brochard, D. Tomoyo, Taniguchi Ma, D. C. BE Papadakis, G TI FLUID-STRUCTURE INTERACTION Fluid Structure Interaction and Sloshing SO PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE (PVP-2011), VOL 4 LA English DT Proceedings Paper CT ASME Pressure Vessels and Piping Conference CY JUL 17-21, 2011 CL Baltimore, MD SP ASME, Pressure Vessels & Pip Div C1 [Brochard, D.] Commissariat Energie Atom, Paris, France. [Tomoyo, Taniguchi] Tottori Univ, Tottori, Japan. [Ma, D. C.] Argonne Natl Lab, Argonne, IL USA. RP Brochard, D (reprint author), Commissariat Energie Atom, Paris, France. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC MECHANICAL ENGINEERS PI NEW YORK PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA BN 978-0-7918-4454-0; 978-0-7918-4454-0 PY 2012 BP 389 EP + PG 2 WC Engineering, Mechanical SC Engineering GA BFL57 UT WOS:000320410300046 ER PT B AU Mapar, J Mahrous, K Guzman, K Heath, Z John, CJ Mier, SA Mueller, S Pancerella, CM Rothfuss, A Teclemariam, N Yang, LI Yoshimura, A Holtermann, K Legary, J Elkin, GR Norige, AS Fiedler, L AF Mapar, Jalal Mahrous, Karim Guzman, Katherine Heath, Zach John, Charles J. Mier, Steven A. Mueller, Stephen Pancerella, Carmen M. Rothfuss, Andrew Teclemariam, Nerayo Yang, Lynn I. Yoshimura, Ann Holtermann, Keith Legary, Justin Elkin, Gabriel R. Norige, Adam S. Fiedler, Lars GP IEEE TI The Role of Integrated Modeling and Simulation in Disaster Preparedness and Emergency Preparedness and Response: The SUMMIT Platform SO 2012 IEEE INTERNATIONAL CONFERENCE ON TECHNOLOGIES FOR HOMELAND SECURITY LA English DT Proceedings Paper CT 12th IEEE International Conference on Technologies for Homeland Security (HST) CY NOV 13-15, 2012 CL Waltham, MA SP IEEE, IEEE Biometr Council, IEEE Boston Sect, IEEE USA, Massport, L3 Commun, Global Secur Finance, Homeland Secur Jobs, Market Res Media DE modeling and simulation; exercise planning; disaster preparedness; emergency preparedness; SUMMIT; National Preparedness System; NESC Technology Platform AB The Department of Homeland Security, Science and Technology Directorate (DHS S&T), in partnership with the Federal Emergency Management Agency (FEMA), and in collaboration with Sandia National Laboratories, has developed the Standard Unified Modeling, Mapping, and Integration Toolkit (SUMMIT) as a geo-agile platform that enables users to discover and reuse models, integrate them quickly and economically, and apply them in analyses to improve the planning and execution of large and small exercises, planning efforts, and eventually response operations. The SUMMIT technology is innovative and promises to reduce the exercise cycle time by more than an order of magnitude. SUMMIT has been deployed to support National Level Exercises, regional exercises, and international exercises in Sweden, revolutionizing how exercises are designed and conducted. SUMMIT is now in the transition stage, from DHS S&T to the FEMA National Exercise and Simulation Center (NESC), where it will become available to the emergency management community. It will support the National Preparedness System[1] and integrate with the NESC Technology Platform in support of local, state, regional and national level exercises. C1 [Mapar, Jalal] Sci & Technol Directorate, Dept Homeland Secur, Washington, DC USA. [Mahrous, Karim; Guzman, Katherine; Heath, Zach; John, Charles J.; Mier, Steven A.; Mueller, Stephen; Pancerella, Carmen M.; Rothfuss, Andrew; Teclemariam, Nerayo; Yang, Lynn I.; Yoshimura, Ann] Sandia Natl Labs, Livermore, CA 94550 USA. [Holtermann, Keith; Legary, Justin] Fed Emergency Management Assoc, Washington, DC USA. [Elkin, Gabriel R.; Norige, Adam S.; Fiedler, Lars] MIT, Lincoln Lab, Lexington, MA 02173 USA. RP Mapar, J (reprint author), Sci & Technol Directorate, Dept Homeland Secur, Washington, DC USA. EM Jalal.Mapar@dhs.gov; kmmahro@sandia.gov; kguzman@sandia.gov; zheath@sandia.gov; cjjohn@sandia.gov; samier@sandia.gov; snmuell@sandia.gov; carmen@sandia.gov; arothfu@sandia.gov; nptecle@sandia.gov; liyang@sandia.gov; asyosh@sandia.gov; Keith.Holtermann@fema.dhs.gov; Justin.Legary@fema.dhs.gov; gabee@ll.mit.edu; anorige@ll.mit.edu; fiedler@ll.mit.edu FU Department of Homeland Security, Science & Technology Directorate, Infrastructure Protection & Disaster Management Division and FEMA National Exercise and Simulation Center ( NESC) FX Co - sponsored by Department of Homeland Security, Science & Technology Directorate, Infrastructure Protection & Disaster Management Division and FEMA National Exercise and Simulation Center ( NESC). NR 9 TC 2 Z9 2 U1 1 U2 6 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-2709-1; 978-1-4673-2708-4 PY 2012 BP 117 EP 122 PG 6 WC Computer Science, Theory & Methods SC Computer Science GA BEZ20 UT WOS:000318851500019 ER PT J AU Adler, PR Del Grosso, SJ Inman, D Jenkins, RE Spatari, S Zhang, YM AF Adler, Paul R. Del Grosso, Stephen J. Inman, Daniel Jenkins, Robin E. Spatari, Sabrina Zhang, Yimin BE Liebig, MA Franzluebbers, AJ Follett, RF TI Mitigation Opportunities for Life-Cycle Greenhouse Gas Emissions during Feedstock Production across Heterogeneous Landscapes SO MANAGING AGRICULTURAL GREENHOUSE GASES: COORDINATED AGRICULTURAL RESEARCH THROUGH GRACENET TO ADDRESS OUR CHANGING CLIMATE LA English DT Article; Book Chapter ID NITROUS-OXIDE EMISSIONS; N2O EMISSIONS; AGRICULTURAL FIELDS; NO-TILL; SOILS; CORN; MANAGEMENT; EFFICIENCY; ETHANOL; IMPACTS C1 [Adler, Paul R.] USDA ARS, Pasture Syst & Watershed Management Res Unit, University Pk, PA USA. [Del Grosso, Stephen J.] USDA ARS, Soil Plant Nutrient Res Unit, Ft Collins, CO 80522 USA. [Inman, Daniel] Natl Renewable Energy Lab, Natl Bioenergy Ctr, Golden, CO USA. [Jenkins, Robin E.] DuPont Engn Res & Technol, Wilmington, DE USA. [Spatari, Sabrina] Drexel Univ, Philadelphia, PA 19104 USA. [Zhang, Yimin] Natl Renewable Energy Lab, Strateg Energy Anal Ctr, Golden, CO USA. RP Adler, PR (reprint author), USDA ARS, Pasture Syst & Watershed Management Res Unit, University Pk, PA USA. NR 48 TC 5 Z9 5 U1 1 U2 2 PU ELSEVIER ACADEMIC PRESS INC PI SAN DIEGO PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 USA BN 978-0-12-386898-5 PY 2012 BP 203 EP 219 DI 10.1016/B978-0-12-386897-8.00012-7 PG 17 WC Agronomy; Environmental Sciences SC Agriculture; Environmental Sciences & Ecology GA BFH81 UT WOS:000319907800014 ER PT J AU Izaurralde, RC McGill, WB Williams, JR AF Izaurralde, R. C. McGill, W. B. Williams, J. R. BE Liebig, MA Franzluebbers, AJ Follett, RF TI Development and Application of the EPIC Model for Carbon Cycle, Greenhouse Gas Mitigation, and Biofuel Studies SO MANAGING AGRICULTURAL GREENHOUSE GASES: COORDINATED AGRICULTURAL RESEARCH THROUGH GRACENET TO ADDRESS OUR CHANGING CLIMATE LA English DT Article; Book Chapter ID ORGANIC-MATTER DYNAMICS; LONG-TERM; CROP PRODUCTION; SOIL; SEQUESTRATION; BIOCHAR; AGRICULTURE; EMISSIONS; EROSION; CLIMATE C1 [Izaurralde, R. C.] Univ Maryland, Joint Global Change Res Inst, Pacific NW Natl Lab, College Pk, MD 20742 USA. [McGill, W. B.] Univ No British Columbia, Prince George, BC V2L 5P2, Canada. [Williams, J. R.] Texas A&M Univ, Texas Agri Life Extens Serv, Temple, TX USA. RP Izaurralde, RC (reprint author), Univ Maryland, Joint Global Change Res Inst, Pacific NW Natl Lab, College Pk, MD 20742 USA. NR 58 TC 6 Z9 6 U1 0 U2 8 PU ELSEVIER ACADEMIC PRESS INC PI SAN DIEGO PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 USA BN 978-0-12-386898-5 PY 2012 BP 293 EP 308 DI 10.1016/B978-0-12-386897-8.00017-6 PG 16 WC Agronomy; Environmental Sciences SC Agriculture; Environmental Sciences & Ecology GA BFH81 UT WOS:000319907800019 ER PT S AU Bauer, C Guastalla, G Leske, J Moller, O Moller, T Pakarinen, J Pietralla, N Rainovski, G Rapisarda, E Seweryniak, D Stahl, C Stegmann, R Wiederhold, J Zhu, S AF Bauer, C. Guastalla, G. Leske, J. Moeller, O. Moeller, T. Pakarinen, J. Pietralla, N. Rainovski, G. Rapisarda, E. Seweryniak, D. Stahl, C. Stegmann, R. Wiederhold, J. Zhu, S. BE Ershov, S Shneydman, T Vdovin, A Zubov, A TI Level lifetimes and quadrupole moments from Coulomb excitation in the Ba chain and the N=80 isotones SO NSRT12 - INTERNATIONAL CONFERENCE ON NUCLEAR STRUCTURE AND RELATED TOPICS SE EPJ Web of Conferences LA English DT Proceedings Paper CT 6th International Conference on Nuclear Structure and Related Topics (NSRT) CY JUL 03-07, 2012 CL Bogoliubov Lab Theoret Phys, Dubna, RUSSIA HO Bogoliubov Lab Theoret Phys ID NUCLEI; TRANSITION; STATE AB The chain of Barium isotopes enables us to study experimentally the evolution of nuclear quadrupole collectivity from the shell closure at N = 82 towards neutron-deficient or neutron-rich deformed nuclei. The TU Darmstadt group has investigated several nuclei from stable Ba-130,Ba-132 up to radioactive Ba-140,Ba-142 with the projectile-Coulomb excitation technique including the use of the Doppler-shift attenuation method (DSAM). Lifetimes of quadrupole-collective states of Ba-132 and Ba-140 were obtained for the first time as well as the static electric quadrupole moments Q(2(1)(+)) for Ba-130,Ba-132 and Ba-140,Ba-142. The results are compared to Monte Carlo shell model and Beyond-Mean-Field calculations. The phenomenon of shell stabilization in the N = 80 isotones is further investigated by measurements of the B(E2;2(1)(+) -> 0(1)(+)) values of Nd-140 and Sm-142 and comparison to the quasi-particle phonon model and shell-model calculations. C1 [Bauer, C.; Guastalla, G.; Leske, J.; Moeller, O.; Moeller, T.; Pietralla, N.; Stahl, C.; Stegmann, R.; Wiederhold, J.] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany. [Pakarinen, J.; Rapisarda, E.] CERN, Geneva, Switzerland. [Pietralla, N.] GSI Helmholtzzentrum Schwerionenforschung mbH, D-64291 Darmstadt, Germany. [Rainovski, G.] Sofia Univ St Kliment Ohridski, Fac Phys, BG-1164 Sofia, Bulgaria. [Seweryniak, D.; Zhu, S.] Argonne Natl Lab, Chicago, IL USA. RP Bauer, C (reprint author), Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany. EM bauer@ikp.tu-darmstadt.de RI Rainovski, Georgi/A-3450-2008; Wiederhold, Johannes/C-7628-2017; OI Rainovski, Georgi/0000-0002-1729-0249; Wiederhold, Johannes/0000-0001-6229-0945; Pakarinen, Janne/0000-0001-8944-8757 FU BMBF [06DA9036I, 06DA9041I, 06DA7046, 06MT238, 06MT9156]; RII3-EURONS [506065]; State of Hesse in the framework of the LOEWE program; DFG [Pi 393/2-2]; German- Bulgarian exchange program [PPP 50751591, DNTS/01/2/2011] FX We thank all those who contributed to our experiments at ANL and REX-ISOLDE. For the interpretation of the data, we thank N. Shimizu, T. Otsuka, T. R. Rodriguez, Ch. Stoyanov, D. Tarpanov, N. Lo Iudice, and D. Bianco. We gratefully acknowledge the support of the scientists and staff members at the mentioned labs during the experimental runs. In particular, we thank the IS411 collaboration ( see Ref. [ 6]) for providing us with the data on 140; 142Ba and T. Stora, D. Voulot, and F. Wenander for their continuous support during all experiments at MINIBALL. The data analysis of the experiments on 140; 142Ba and the experiments on 140Nd, 142Sm have been supported by the BMBF under grant Nos. 06DA9036I, 06DA9041I, 06DA7046, 06MT238, 06MT9156, RII3-EURONS ( Contract No. 506065) and by HIC for FAIR funded by the State of Hesse in the framework of the LOEWE program. The experiments on 130; 132Ba were supported by the DFG under grant No. Pi 393/2-2 and the German- Bulgarian exchange program under grant Nos. PPP 50751591 and DNTS/01/2/2011. NR 39 TC 3 Z9 3 U1 2 U2 5 PU E D P SCIENCES PI CEDEX A PA 17 AVE DU HOGGAR PARC D ACTIVITES COUTABOEUF BP 112, F-91944 CEDEX A, FRANCE SN 2100-014X J9 EPJ WEB CONF PY 2012 VL 38 AR UNSP 10003 DI 10.1051/epjconf/20123810003 PG 5 WC Physics, Nuclear SC Physics GA BFH92 UT WOS:000319926000029 ER PT S AU Shneidman, TM Andreev, AV Pigni, MT Massimi, C Vannini, G Ventura, A AF Shneidman, T. M. Andreev, A. V. Pigni, M. T. Massimi, C. Vannini, G. Ventura, A. BE Ershov, S Shneydman, T Vdovin, A Zubov, A TI Collective spectra along the fission barrier SO NSRT12 - INTERNATIONAL CONFERENCE ON NUCLEAR STRUCTURE AND RELATED TOPICS SE EPJ Web of Conferences LA English DT Proceedings Paper CT 6th International Conference on Nuclear Structure and Related Topics (NSRT) CY JUL 03-07, 2012 CL Bogoliubov Lab Theoret Phys, Dubna, RUSSIA HO Bogoliubov Lab Theoret Phys ID ACTINIDE NUCLEI; CROSS-SECTIONS; ENERGY; FRAGMENTS; SYSTEM; MODEL AB Discrete and continuous spectra of fissioning nuclei at the humps of fission barriers (Bohr transition states) and in the intermediate wells (superdeformed and hyperdeformed states) play a key role in the calculation of fission cross sections. A theoretical evaluation of the collective parts of the spectra is possible within the framework of the dinuclear system model, which treats the wave function of the fissioning nucleus as a superposition of a mononucleus configuration and two-cluster configurations in a dynamical way, permitting exchange of upper-shell nucleons between clusters. The impact of theoretical spectra on neutron-induced fission cross sections and, in combination with an improved version of the scission-point model, on angular distribution of fission fragments is evaluated for plutonium isotopes of interest to nuclear energy applications. C1 [Shneidman, T. M.; Andreev, A. V.] Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia. [Pigni, M. T.] Oak Ridge Natl Lab, Nucl Data Critical Safety, Oak Ridge, TN 37831 USA. [Massimi, C.; Vannini, G.; Ventura, A.] Ist Nazl Fis Nucl, Sezione Bologna, I-40126 Bologna, Italy. [Massimi, C.; Vannini, G.] Univ Bologna, Dipartmento Fis, I-40126 Bologna, Italy. [Ventura, A.] Centro Ricerche Ezio Clementel, ENEA, I-40129 Bologna, Italy. RP Shneidman, TM (reprint author), Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia. EM shneyd@theor.jinr.ru RI Massimi, Cristian/B-2401-2015; Massimi, Cristian/K-2008-2015 OI Massimi, Cristian/0000-0001-9792-3722; Massimi, Cristian/0000-0003-2499-5586 NR 24 TC 0 Z9 0 U1 0 U2 1 PU E D P SCIENCES PI CEDEX A PA 17 AVE DU HOGGAR PARC D ACTIVITES COUTABOEUF BP 112, F-91944 CEDEX A, FRANCE SN 2100-014X J9 EPJ WEB CONF PY 2012 VL 38 AR UNSP 07001 DI 10.1051/epjconf/20123807001 PG 7 WC Physics, Nuclear SC Physics GA BFH92 UT WOS:000319926000019 ER PT J AU Simmons, BA AF Simmons, Blake A. BE Altman, A Hasegawa, PM TI Bioenergy from plants and plant residues SO PLANT BIOTECHNOLOGY AND AGRICULTURE: PROSPECTS FOR THE 21ST CENTURY LA English DT Article; Book Chapter ID CELLULOSIC ETHANOL-PRODUCTION; IONIC LIQUID PRETREATMENT; DILUTE-ACID PRETREATMENT; CARBOHYDRATE-BINDING MODULES; BIOMASS PYROLYSIS OILS; ENZYMATIC-HYDROLYSIS; ORGANOSOLV PRETREATMENT; LIGNOCELLULOSIC BIOMASS; BIOFUEL PRODUCTION; TECHNOLOGY C1 Joint BioEnergy Inst, Deconstruct Div, Emeryville, CA USA. RP Simmons, BA (reprint author), Joint BioEnergy Inst, Deconstruct Div, Emeryville, CA USA. NR 94 TC 4 Z9 5 U1 0 U2 1 PU ELSEVIER ACADEMIC PRESS INC PI SAN DIEGO PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 USA BN 978-0-12-381467-8 PY 2012 BP 495 EP 505 DI 10.1016/B978-0-12-381466-1.00031-6 PG 11 WC Agricultural Engineering; Plant Sciences SC Agriculture; Plant Sciences GA BEW34 UT WOS:000318399700034 ER PT B AU Demas, NG Ajayi, OO Shareef, I AF Demas, Nicholaos G. Ajayi, Oyelayo O. Shareef, Iqbal GP ASME TI EFFECTS OF SURFACE CONTAMINATION LAYERS AND ROUGHNESS ON THE DETERMINATION OF MECHANICAL PROPERTIES OF THIN FILMS USING. NANOINDENTATION SO PROCEEDINGS OF THE ASME/STLE INTERNATIONAL JOINT TRIBOLOGY CONFERENCE - 2011 LA English DT Proceedings Paper CT ASME/STLE International Joint Tribology Conference CY OCT 24-26, 2011 CL Los Angeles, CA SP ASME, Tribol Div, Soc Tribologists & Lubricat Engineers ID INDENTATION AB Nanoindentation measurements on TiAlN, CrN, a-C:H:Me, and TiN, deposited on steel substrates have been performed. It was found that the resulting surface roughness/morphology after deposition significantly affects the measurements of nanomechanical properties, while measurements of these properties on the surface may be significantly different than the bulk portion of the coating, exhibiting a lower nanohardness due to the existence of a surface contamination layer. A simple method is proposed for accurately measuring the nanomechanical properties of coatings alleviating the need for excessive statistical analysis and the issues that arise from surface topography and the presence of surface and contamination layers on thin films. C1 [Demas, Nicholaos G.; Ajayi, Oyelayo O.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Demas, NG (reprint author), Argonne Natl Lab, 9700South Cass Ave, Argonne, IL 60439 USA. NR 6 TC 0 Z9 0 U1 0 U2 1 PU AMER SOC MECHANICAL ENGINEERS PI NEW YORK PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA BN 978-0-7918-5474-7 PY 2012 BP 13 EP 15 PG 3 WC Engineering, Mechanical SC Engineering GA BFI64 UT WOS:000320008100004 ER PT B AU Lorenzo-Martin, C Ajayi, O Smith, C Krol, S AF Lorenzo-Martin, C. Ajayi, O. Smith, C. Krol, S. GP ASME TI ENERGY EFFICIENT SURFACE HARDENING OF 4140 STEEL BY FRICTION STIR PROCESSING FOR TRIBOLOGICAL APPLICATIONS SO PROCEEDINGS OF THE ASME/STLE INTERNATIONAL JOINT TRIBOLOGY CONFERENCE - 2011 LA English DT Proceedings Paper CT ASME/STLE International Joint Tribology Conference CY OCT 24-26, 2011 CL Los Angeles, CA SP ASME, Tribol Div, Soc Tribologists & Lubricat Engineers AB One of the most energy intensive industrial and manufacturing processes is the heat treatment of ferrous materials for hardening to improve their friction and wear performance. Examples of surface hardening heat treatments include case carburizing, nitriding, bonding, etc. This paper presents the development of a new energy efficient method to harden steel material as a possible replacement for the current energy intensive heat treatment processes. The new process, friction stir processing (FSP) involves severe plastic deformation of the near surface material by a non-consumable rotating and translating tool. FSP has been demonstrated to locally modify material properties such as ductility, fatigue, fracture toughness, etc. Other potential properties that could be positively affected by FSP are wear and friction properties. In a preliminary study, when applied to 4140 alloy steel, this new FSP process produced adequate hardening of the near surface layer compare to conventional furnace heat hardening of the same alloy. The friction and wear performance of the 4140 hardened by FSP was also observed to be superior than heat hardened surface under dry and lubricated sliding contact. C1 [Lorenzo-Martin, C.; Ajayi, O.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Lorenzo-Martin, C (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 4 TC 0 Z9 0 U1 2 U2 2 PU AMER SOC MECHANICAL ENGINEERS PI NEW YORK PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA BN 978-0-7918-5474-7 PY 2012 BP 63 EP 65 PG 3 WC Engineering, Mechanical SC Engineering GA BFI64 UT WOS:000320008100016 ER PT B AU Lorenzo-Martin, C Ajayi, O Fenske, G AF Lorenzo-Martin, C. Ajayi, O. Fenske, G. GP ASME TI ENHANCEMENT OF TRIBOLOGICAL PERFORMANCE OF 6061 ALUMINUM ALLOY BY SECOND PHASE HARDENING VIA FRICTION STIR PROCESSING SO PROCEEDINGS OF THE ASME/STLE INTERNATIONAL JOINT TRIBOLOGY CONFERENCE - 2011 LA English DT Proceedings Paper CT ASME/STLE International Joint Tribology Conference CY OCT 24-26, 2011 CL Los Angeles, CA SP ASME, Tribol Div, Soc Tribologists & Lubricat Engineers AB The properties of metallic alloys can be substantial modified by the addition of a second phase particles. This is especially noticeable when hard particles are incorporated in a relatively soft matrix, often resulting in improved mechanical and tribological performance. This paper presents the results of our study on mechanical and tribological performance enhancement of 6061 Aluminum alloys by incorporation of B4C particle via Friction stir processing (FSP). Unidirectional ball on flat friction and wear tests were conducted with a base material, friction stir processed 6061-Al and 6061-Al doped with B4C particles via FSP against 52100 bearing steel balls under dry sliding conditions. The incorporation of particles not only reduced friction by 30% but also reduced wear by 2 orders of magnitude compared to unprocessed base and FSP material without particles incorporation. FSP alone without particles addition did not have a significant effect on the tribological behavior of the tested aluminum alloy. C1 [Lorenzo-Martin, C.; Ajayi, O.; Fenske, G.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Lorenzo-Martin, C (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 3 TC 0 Z9 0 U1 1 U2 1 PU AMER SOC MECHANICAL ENGINEERS PI NEW YORK PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA BN 978-0-7918-5474-7 PY 2012 BP 67 EP 69 PG 3 WC Engineering, Mechanical SC Engineering GA BFI64 UT WOS:000320008100017 ER PT B AU Bansal, DG Qu, J Yu, B Luo, HM Dai, S Bunting, B Blau, P Mordukhovich, G Smolenski, DJ AF Bansal, Dinesh G. Qu, Jun Yu, Bo Luo, Huimin Dai, Sheng Bunting, Bruce Blau, Peter Mordukhovich, Gregory Smolenski, Donald J. GP ASME TI CHARACTERIZATION AND TRIBOLOGICAL EVALUATION OF 1-BENZYL-3-METHYLIMIDAZOLIUM BIS(TRIFLUOROMETHYLSULFONYL)IMIDE AS NEAT LUBRICANT AND OIL ADDITIVE SO PROCEEDINGS OF THE ASME/STLE INTERNATIONAL JOINT TRIBOLOGY CONFERENCE - 2011 LA English DT Proceedings Paper CT ASME/STLE International Joint Tribology Conference CY OCT 24-26, 2011 CL Los Angeles, CA SP ASME, Tribol Div, Soc Tribologists & Lubricat Engineers ID IONIC LIQUIDS; AMMONIUM AB Selected physical and chemical properties and tribological data for a newly-developed, imidazolium-based ionic liquid (IL) are presented. The IL is soluble in the SAE 5W-30 oil up to a certain weight percentage, and is as a promising candidate for use in lubrication applications, either in its neat version or as an oil additive. Characterization of the IL included dynamic viscosity at different temperatures, corrosion effects on cast iron cylinder liners, and thermal stability analysis. The tribological performance was evaluated using a reciprocating ring-on-liner test arrangement. When used in neat version this IL demonstrated friction coefficient comparable to a fully formulated engine oil, and when used as an oil additive it produced less wear. C1 [Bansal, Dinesh G.; Qu, Jun; Blau, Peter] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA. RP Bansal, DG (reprint author), Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA. RI Dai, Sheng/K-8411-2015 OI Dai, Sheng/0000-0002-8046-3931 NR 7 TC 0 Z9 0 U1 0 U2 7 PU AMER SOC MECHANICAL ENGINEERS PI NEW YORK PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA BN 978-0-7918-5474-7 PY 2012 BP 91 EP 93 PG 3 WC Engineering, Mechanical SC Engineering GA BFI64 UT WOS:000320008100023 ER PT J AU Hauser, SG Crandall, K AF Hauser, Steve G. Crandall, Kelly BE Sioshansi, FP TI Smart Grid Is a Lot More than Just "Technology" SO SMART GRID: INTEGRATING RENEWABLE, DISTRIBUTED & EFFICIENT ENERGY LA English DT Article; Book Chapter C1 [Hauser, Steve G.] Natl Renewable Energy Lab, Grid Integrat, Golden, CO USA. [Crandall, Kelly] City Boulder, LEAD, Boulder, CO USA. [Crandall, Kelly] City Boulder, Boulder, CO USA. [Crandall, Kelly] Natl Renewable Energy Lab, Golden, CO 80401 USA. [Crandall, Kelly] Natl Renewable Energy Lab, Natl Sci & Technol Councils Subcomm Smart Grid, Golden, CO 80401 USA. RP Hauser, SG (reprint author), Natl Renewable Energy Lab, Grid Integrat, Golden, CO USA. NR 45 TC 4 Z9 4 U1 0 U2 0 PU ELSEVIER ACADEMIC PRESS INC PI SAN DIEGO PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 USA BN 978-0-12-386453-6 PY 2012 BP 3 EP 28 DI 10.1016/B978-0-12-386452-9.00001-2 PG 26 WC Computer Science, Hardware & Architecture; Energy & Fuels SC Computer Science; Energy & Fuels GA BFK42 UT WOS:000320231500004 ER PT J AU Wang, WM Wang, JH Ton, D AF Wang, W. Maria Wang, Jianhui Ton, Dan BE Sioshansi, FP TI Prospects for Renewable Energy: Meeting the Challenges of Integration with Storage SO SMART GRID: INTEGRATING RENEWABLE, DISTRIBUTED & EFFICIENT ENERGY LA English DT Article; Book Chapter C1 [Wang, Jianhui] Argonne Natl Lab, CEEESA, Argonne, IL 60439 USA. [Ton, Dan] US DOE, Off Elect Delivery & Energy Reliabil, Washington, DC 20585 USA. [Ton, Dan] US DOE, Solar Energy Technol Program, Renewable Syst Integrat Program, Washington, DC 20585 USA. NR 24 TC 3 Z9 3 U1 1 U2 2 PU ELSEVIER ACADEMIC PRESS INC PI SAN DIEGO PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 USA BN 978-0-12-386453-6 PY 2012 BP 103 EP 126 DI 10.1016/B978-0-12-386452-9.00005-X PG 24 WC Computer Science, Hardware & Architecture; Energy & Fuels SC Computer Science; Energy & Fuels GA BFK42 UT WOS:000320231500008 ER PT J AU Kao, SC Kim, HK Liu, C Cui, XH Bhaduri, BL AF Kao, Shih-Chieh Kim, Hoe Kyoung Liu, Cheng Cui, Xiaohui Bhaduri, Budhendra L. TI Dependence-Preserving Approach to Synthesizing Household Characteristics SO TRANSPORTATION RESEARCH RECORD LA English DT Article ID POPULATION SYNTHESIS; TRAVEL; COPULA AB One effective approach to study day-to-day traveler behavior is through the activity-based traffic demand model, in which all travelers are treated as individual agents and interact under a computation-intensive framework. Nevertheless, because of high survey costs, low response rate, and privacy concerns, detailed household and personal characteristics are usually unavailable. Various population synthesizers were therefore proposed to reconstruct a methodologically rigorous estimate of household characteristics from different surveys. For instance, the iterative proportional fitting (IPF) algorithm is used to synthesize the full population from the public use microdata sample (PUMS) and Census Summary File 3 (SF3) in the popular activity-based traffic demand model, TRANSIMS. However, some fundamental limitations of IPF (e.g., zero cells in the contingency table as a result of small sample size) have drawn sufficient attention and resulted in the development of enhanced IPF algorithms and other strategies. This paper proposes a copula-based method to synthesize household characteristics that preserves marginal distributions and dependence structure between variables. The proposed method is tested for the state of Iowa, and the results are compared with the IPF approach of TRANSIMS. The synthesized households resulted in the same local SF3 statistics at each block group. But having similar inter-variable correlations as described in the PUMS suggest the applicability of the copula-based approach. Because marginal distributions and dependence structure can be faithfully preserved, the proposed method could be a suitable alternative to synthesize realistic agent characteristics for further activity-based traffic demand modeling. C1 [Kao, Shih-Chieh; Liu, Cheng; Bhaduri, Budhendra L.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [Kim, Hoe Kyoung] Dong A Univ, Pusan 604714, South Korea. [Cui, Xiaohui] New York Inst Technol, New York, NY 10023 USA. RP Kim, HK (reprint author), Dong A Univ, 840 Hadan2 Dong, Pusan 604714, South Korea. EM hoekim@dau.ac.kr RI Kao, Shih-Chieh/B-9428-2012 OI Kao, Shih-Chieh/0000-0002-3207-5328 FU Laboratory Directed Research and Development Program of Oak Ridge National Laboratory; U.S. Department of Energy FX This research was sponsored by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the U.S. Department of Energy. This paper has been written by employees of UT-Battelle, LLC, under contract with the U.S. Department of Energy. NR 34 TC 2 Z9 2 U1 0 U2 11 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0361-1981 J9 TRANSPORT RES REC JI Transp. Res. Record PY 2012 IS 2302 BP 192 EP 200 DI 10.3141/2302-21 PG 9 WC Engineering, Civil; Transportation; Transportation Science & Technology SC Engineering; Transportation GA 161PS UT WOS:000320206400021 ER PT J AU Callaway, JC Borde, AB Diefenderfer, HL Parker, VT Rybczyk, JM Thom, RM AF Callaway, John C. Borde, Amy B. Diefenderfer, Heida L. Parker, V. Thomas Rybczyk, John M. Thom, Ronald M. BE Batzer, DP Baldwin, AH TI Pacific Coast Tidal Wetlands SO WETLAND HABITATS OF NORTH AMERICA: ECOLOGY AND CONSERVATION CONCERNS LA English DT Article; Book Chapter ID SAN-FRANCISCO BAY; SALICORNIA-VIRGINICA L; SALT-MARSH VEGETATION; SPARTINA-FOLIOSA TRIN; ZOSTERA-MARINA L.; SOUTHERN CALIFORNIA; WASHINGTON-STATE; TIJUANA-ESTUARY; COLUMBIA RIVER; DIEGO BAY C1 [Callaway, John C.] Univ San Francisco, Dept Environm Sci, San Francisco, CA 94117 USA. [Borde, Amy B.; Diefenderfer, Heida L.; Thom, Ronald M.] Pacific NW Natl Lab, Marine Sci Lab, Sequim, WA 98382 USA. [Parker, V. Thomas] San Francisco State Univ, Dept Biol, San Francisco, CA 94132 USA. [Rybczyk, John M.] Western Washington Univ, Dept Environm Sci, Huxley Coll, Bellingham, WA 98225 USA. RP Callaway, JC (reprint author), Univ San Francisco, Dept Environm Sci, 2130 Fulton St, San Francisco, CA 94117 USA. EM callaway@usfca.edu NR 114 TC 9 Z9 10 U1 1 U2 8 PU UNIV CALIFORNIA PRESS PI BERKELEY PA 2120 BERKELEY WAY, BERKELEY, CA 94720 USA BN 978-0-520-95141-9 PY 2012 BP 103 EP 116 PG 14 WC Biodiversity Conservation; Ecology; Marine & Freshwater Biology SC Biodiversity & Conservation; Environmental Sciences & Ecology; Marine & Freshwater Biology GA BFF60 UT WOS:000319665000009 ER PT S AU Tuncer, E Sauers, I AF Tuncer, Enis Sauers, Isidor GP IEEE TI Effective Dielectric Properties of Binary Dielectric Mixtures on Checkerboards SO 2012 ANNUAL REPORT CONFERENCE ON ELECTRICAL INSULATION AND DIELECTRIC PHENOMENA (CEIDP) SE Conference on Electrical Insulation and Dielectric Phenomena Annual Report LA English DT Proceedings Paper CT IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) CY OCT 14-17, 2012 CL Montreal, CANADA SP IEEE ID 2-COMPONENT COMPOSITE; BOUNDS; PERMITTIVITY; CONDUCTIVITY AB Effective dielectric properties of checkerboard structures composed of two media are calculated using the finite element method. Random arrangements of media are considered on 16 x 16, 32 x 32 and 64 x 64 checkerboards with different concentration ratios of the medium. Using three different board sizes allow us to study finite-size scaling effects. Electrical field distributions estimated from the finite element method are used to predict the amount of electrically stressed regions. It is concluded that for the considered systems these structures can plausibly be described with the symmetric Bruggeman effective medium expression. C1 [Tuncer, Enis] Gen Elect Global Res Ctr, Moscow 123098, Russia. [Sauers, Isidor] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Tuncer, E (reprint author), Gen Elect Global Res Ctr, Moscow 123098, Russia. EM enis.tuncer@physics.org OI Tuncer, Enis/0000-0002-9324-4324 NR 20 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0084-9162 BN 978-1-4673-1252-3 J9 C ELECT INSUL DIEL P PY 2012 BP 633 EP 636 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BEJ40 UT WOS:000316899800149 ER PT S AU Colbaugh, R Glass, K Johnson, C AF Colbaugh, Rich Glass, Kristin Johnson, Curtis BE Laroque, C Himmelspach, J Pasupathy, R TI PREDICTIVE NON-EQUILIBRIUM SOCIAL SCIENCE SO 2012 WINTER SIMULATION CONFERENCE (WSC) SE Winter Simulation Conference Proceedings LA English DT Proceedings Paper CT Winter Simulation Conference (WSC) CY DEC 09-12, 2012 CL Berlin, GERMANY AB Non-Equilibrium Social Science (NESS) emphasizes dynamical phenomena, for instance the way political movements emerge or competing organizations interact. This paper argues that predictive analysis is an essential element of NESS, occupying a central role in its scientific inquiry and representing a key activity of practitioners in domains such as economics, public policy, and national security. We begin by clarifying the distinction between models which are useful for prediction and the much more common explanatory models studied in the social sciences. We then investigate a challenging real-world predictive analysis case study, and find evidence that the poor performance of standard prediction methods does not indicate an absence of human predictability but instead reflects (1.) incorrect assumptions concerning the predictive utility of explanatory models, (2.) misunderstanding regarding which features of social dynamics actually possess predictive power, and (3.) practical difficulties exploiting predictive representations. C1 [Colbaugh, Rich] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. [Glass, Kristin] New Mexico Inst Min & Technol, Socorro, NM USA. [Johnson, Curtis] Sandia Natl Labs, Albuquerque, NM USA. RP Colbaugh, R (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM colbaugh@comcast.et; kglass@icasa.nmt.edu; cjohnso@sandia.gov NR 26 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0891-7736 BN 978-1-4673-4779-2; 978-1-4673-4780-8 J9 WINT SIMUL C PROC PY 2012 PG 12 WC Computer Science, Theory & Methods SC Computer Science GA BFD03 UT WOS:000319225503063 ER PT S AU Macal, CM North, MJ Collier, N Lauderdale, DS David, MZ Daum, RS Shumm, P Evans, JA Wilder, JR Dukic, VM Wegener, DT AF Macal, Charles M. North, Michael J. Collier, Nicholson Lauderdale, Diane S. David, Michael Z. Daum, Robert S. Shumm, Philip Evans, James A. Wilder, Jocelyn R. Dukic, Vanja M. Wegener, Duane T. BE Laroque, C Himmelspach, J Pasupathy, R TI MODELING THE SPREAD OF COMMUNITY-ASSOCIATED MRSA SO 2012 WINTER SIMULATION CONFERENCE (WSC) SE Winter Simulation Conference Proceedings LA English DT Proceedings Paper CT Winter Simulation Conference (WSC) CY DEC 09-12, 2012 CL Berlin, GERMANY ID RESISTANT STAPHYLOCOCCUS-AUREUS; INTENSIVE-CARE-UNIT; PANDEMIC INFLUENZA; TRANSMISSION; SIMULATION; DYNAMICS; COLONIZATION; HOSPITALS; DISEASE AB Community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) are strains of the bacterium S. aureus that are responsible for skin and soft tissue, blood, bone, and other infections that can be life threatening. CA-MRSA strains are resistant to standard antibiotics related to penicillins and have a high prevalence in the general community, as well as in healthcare facilities. CA-MRSA presents novel challenges for computational epidemiological modeling compared to other commonly modeled diseases. CA-MRSA challenges include modeling activities and contact processes of individuals in which direct skin contact can be an important infection pathway, estimating disease transmission parameters based on limited data, and representing behavioral responses of individuals to the disease and healthcare interventions. We are developing a fine-grained agent-based model of CA-MRSA for the Chicago metropolitan area. This paper describes how we are modeling CA-MRSA disease processes based on variants of standard epidemiological models and individual agent-based approaches. C1 [Macal, Charles M.; North, Michael J.; Collier, Nicholson] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Macal, Charles M.; North, Michael J.; Collier, Nicholson; Lauderdale, Diane S.; David, Michael Z.; Daum, Robert S.; Shumm, Philip; Evans, James A.; Wilder, Jocelyn R.] Univ Chicago, Chicago, IL 60637 USA. [Dukic, Vanja M.] Univ Colorado, Boulder, CO 80309 USA. [Wegener, Duane T.] Ohio State Univ, Columbus, OH 43210 USA. RP Macal, CM (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM macal@anl.gov; north@anl.gov; nick.collier@gmail.com; lauderdale@uchicago.edu; mdavid@medicine.bsd.uchicago.edu; rdaum@bsd.uchicago.edu; pschumm@uchicago.edu; jevans@uchicago.edu; jwilder@health.bsd.uchicago.edu; Vanja.Dukic@colorado.edu; wegener.1@osu.edu FU NIRAP FX The authors gratefully acknowledge the funding through the NIRAP grant, which is making this research possible, the contributions of diverse partners on this project and especially Ergon Energy for providing the data used in the framework. NR 29 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0891-7736 BN 978-1-4673-4779-2; 978-1-4673-4780-8 J9 WINT SIMUL C PROC PY 2012 PG 12 WC Computer Science, Theory & Methods SC Computer Science GA BFD03 UT WOS:000319225503052 ER PT S AU Perumalla, KS AF Perumalla, Kalyan S. BE Laroque, C Himmelspach, J Pasupathy, R TI TUTORIAL: PARALLEL SIMULATION ON SUPERCOMPUTERS SO 2012 WINTER SIMULATION CONFERENCE (WSC) SE Winter Simulation Conference Proceedings LA English DT Proceedings Paper CT Winter Simulation Conference (WSC) CY DEC 09-12, 2012 CL Berlin, GERMANY AB This tutorial introduces typical hardware and software characteristics of extant and emerging supercomputing platforms, and presents issues and solutions in executing large-scale parallel discrete-event simulation scenarios on such high performance computing systems. Covered topics include synchronization, model organization, example applications, and observed performance from illustrative large-scale runs. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Perumalla, KS (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM perumallaks@ornl.gov NR 21 TC 0 Z9 0 U1 0 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0891-7736 BN 978-1-4673-4779-2 J9 WINT SIMUL C PROC PY 2012 PG 12 WC Computer Science, Theory & Methods SC Computer Science GA BFD03 UT WOS:000319225503038 ER PT S AU Yoginath, SB Perumalla, KS Henz, BJ AF Yoginath, Srikanth B. Perumalla, Kalyan S. Henz, Brian J. BE Laroque, C Himmelspach, J Pasupathy, R TI RUNTIME PERFORMANCE AND VIRTUAL NETWORK CONTROL ALTERNATIVES IN VM-BASED HIGH-FIDELITY NETWORK SIMULATIONS SO 2012 WINTER SIMULATION CONFERENCE (WSC) SE Winter Simulation Conference Proceedings LA English DT Proceedings Paper CT Winter Simulation Conference (WSC) CY DEC 09-12, 2012 CL Berlin, GERMANY AB In prior work (Yoginath and Perumalla, 2011; Yoginath, Perumalla and Henz, 2012), the motivation, challenges and issues were articulated in favor of virtual time ordering of Virtual Machines (VMs) in network simulations hosted on multi-core machines. Two major components in the overall virtualization challenge are (1) virtual timeline establishment and scheduling of VMs, and (2) virtualization of inter-VM communication. Here, we extend prior work by presenting scaling results for the first component, with experimental results on up to 128 VMs scheduled in virtual time order on a single 12-core host. We also explore the solution space of design alternatives for the second component, and present performance results from a multi-threaded, multi-queue implementation of inter-VM network control for synchronized execution with VM scheduling, incorporated in our NetWarp simulation system. C1 [Yoginath, Srikanth B.; Perumalla, Kalyan S.] Oak Ridge Natl Lab, Computat Sci & Engn Div, Oak Ridge, TN 37831 USA. US Army Res Lab, Comp & Computat Sci Div, ATTN, RDRL CIH C, Aberdeen Proving Ground, MD 21005 USA. RP Yoginath, SB (reprint author), Oak Ridge Natl Lab, Computat Sci & Engn Div, Oak Ridge, TN 37831 USA. EM yoginathsb@ornl.gov; perumallaks@ornl.gov; an.j.henz@us.army.mil NR 12 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0891-7736 BN 978-1-4673-4779-2; 978-1-4673-4780-8 J9 WINT SIMUL C PROC PY 2012 PG 13 WC Computer Science, Theory & Methods SC Computer Science GA BFD03 UT WOS:000319225503044 ER PT S AU Ding, HT AF Ding, Heng-Tong BE Badala, A Bleicher, M Fabbietti, L Markert, C Rapp, RF Stroth, J TI In-medium hadron properties from lattice QCD SO RESONANCE WORKSHOP AT UT AUSTIN SE EPJ Web of Conferences LA English DT Proceedings Paper CT 1st International Workshop on Hadronic Resonances CY MAR 05-07, 2012 CL Univ Texas Austin (UT Austin), Austin, TX SP Univ Catania, Dipartimento Fisica & Astronomia HO Univ Texas Austin (UT Austin) ID QUARK-GLUON PLASMA AB I review recent results from lattice QCD calculations on the in-medium hadron properties. I discuss the thermal dilepton rates, heavy quarkonium properties as well as the chiral and U(1)(A) symmetries at finite temperature. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Ding, HT (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. EM htding@quark.phy.bnl.gov NR 34 TC 2 Z9 2 U1 0 U2 0 PU E D P SCIENCES PI CEDEX A PA 17 AVE DU HOGGAR PARC D ACTIVITES COUTABOEUF BP 112, F-91944 CEDEX A, FRANCE SN 2100-014X BN 978-2-7598-0834-2 J9 EPJ WEB CONF PY 2012 VL 36 AR UNSP 00008 DI 10.1051/epjconf/201233600008 PG 9 WC Physics, Particles & Fields SC Physics GA BFH91 UT WOS:000319921600007 ER PT S AU Steinheimer, J Aichelin, J Bleicher, M AF Steinheimer, J. Aichelin, J. Bleicher, M. BE Badala, A Bleicher, M Fabbietti, L Markert, C Rapp, RF Stroth, J TI Sensitivity of the final resonance spectra on the hydrodynamical freeze out SO RESONANCE WORKSHOP AT UT AUSTIN SE EPJ Web of Conferences LA English DT Proceedings Paper CT 1st International Workshop on Hadronic Resonances CY MAR 05-07, 2012 CL Univ Texas Austin (UT Austin), Austin, TX SP Univ Catania, Dipartimento Fisica & Astronomia HO Univ Texas Austin (UT Austin) ID HEAVY-ION COLLISIONS; PHASE-TRANSITION; RELATIVISTIC HYDRODYNAMICS; MODELS AB We present results on hadronic resonance production in high energy nuclear collisions from the UrQMD hybrid model. In particular we are interested in the effect of the final hadronic stage on the properties of resonances observable at RHIC and LHC experiments. We investigate weather these observable properties can be used to pinpoint the transition energy density from the QGP phase to the hadronic phase. C1 [Steinheimer, J.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. [Aichelin, J.] Univ Nantes, Ecole Mines Nantes, CNRS, UMR 6457, F-44307 Nantes 3, France. [Bleicher, M.] Goethe Univ Frankfurt, Frankfurt Inst Adv Studies, D-60438 Frankfurt, Germany. RP Steinheimer, J (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM jsfroschauer@lbl.gov FU BMBF; HGS- hire; Hessian LOEWE; Alexander von Humboldt foundation; Office of Nuclear Physics in the US Department of Energy's Office of Science [DE- AC02- 05CH11231] FX This work was supported by BMBF, HGS- hire and the Hessian LOEWE initiative through the Helmholtz International center for FAIR ( HIC for FAIR). J. S. acknowledges a Feodor Lynen fellowship of the Alexander von Humboldt foundation. This work was supported by the Office of Nuclear Physics in the US Department of Energy's Office of Science under Contract No. DE- AC02- 05CH11231. The computational resources were provided by the LOEWE Frankfurt Center for Scienti c Computing ( LOEWE- CSC). NR 20 TC 2 Z9 2 U1 0 U2 0 PU E D P SCIENCES PI CEDEX A PA 17 AVE DU HOGGAR PARC D ACTIVITES COUTABOEUF BP 112, F-91944 CEDEX A, FRANCE SN 2100-014X BN 978-2-7598-0834-2 J9 EPJ WEB CONF PY 2012 VL 36 AR UNSP 00002 DI 10.1051/epjconf/201233600002 PG 6 WC Physics, Particles & Fields SC Physics GA BFH91 UT WOS:000319921600001 ER PT S AU Vitev, I AF Vitev, Ivan BE Badala, A Bleicher, M Fabbietti, L Markert, C Rapp, RF Stroth, J TI Formation time of hadronic resonances SO RESONANCE WORKSHOP AT UT AUSTIN SE EPJ Web of Conferences LA English DT Proceedings Paper CT 1st International Workshop on Hadronic Resonances CY MAR 05-07, 2012 CL Univ Texas Austin (UT Austin), Austin, TX SP Univ Catania, Dipartimento Fisica & Astronomia HO Univ Texas Austin (UT Austin) ID MESONS; QGP AB In heavy-ion collisions, formation time of hadrons of high transverse momentum can play a pivotal role in determining the perturbative dynamics of the final-state parton and particle system. We present methods to evaluate the formation times of light hadrons, hadronic resonances, open heavy flavor and quarkonia. Experimental implications of the short formation times of heavy particles are discussed in light of recent RHIC and LHC data. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Vitev, I (reprint author), Los Alamos Natl Lab, Div Theoret, Mail Stop B283, Los Alamos, NM 87545 USA. EM ivitev@lanl.gov NR 22 TC 0 Z9 0 U1 0 U2 0 PU E D P SCIENCES PI CEDEX A PA 17 AVE DU HOGGAR PARC D ACTIVITES COUTABOEUF BP 112, F-91944 CEDEX A, FRANCE SN 2100-014X BN 978-2-7598-0834-2 J9 EPJ WEB CONF PY 2012 VL 36 AR UNSP 00018 DI 10.1051/epjconf/201233600018 PG 8 WC Physics, Particles & Fields SC Physics GA BFH91 UT WOS:000319921600017 ER PT J AU Kastengren, AL Tilocco, FZ Powell, CF Manin, J Pickett, LM Payri, R Bazyn, T AF Kastengren, Alan L. Tilocco, F. Zak Powell, Christopher F. Manin, Julien Pickett, Lyle M. Payri, Raul Bazyn, Tim TI ENGINE COMBUSTION NETWORK (ECN): MEASUREMENTS OF NOZZLE GEOMETRY AND HYDRAULIC BEHAVIOR SO ATOMIZATION AND SPRAYS LA English DT Article DE diesel sprays; nozzle geometry; x-ray tomography; microscopy; silicone molding; needle motion ID DIESEL SPRAY BEHAVIOR; EVAPORATIVE CONDITIONS; FLOW; METHODOLOGY; INJECTORS; HOLES AB Despite the importance of sprays to engine combustion, understanding has been hampered by the sensitivity of spray behavior to unknown nozzle geometry effects. The Engine Combustion Network (ECN) collaboration has focused on overcoming this impediment to spray research by focusing on a set of nominally identical diesel injectors. Detailed measurements of the nozzle geometry for the four ECN Spray A injectors (90 mu m diameter, axial single-hole nozzles) have been performed using x-ray tomography, x-ray phase-contrast imaging, silicone molding, and optical microscopy. Measurements of the needle motions (axial and lateral) and hydraulic performance of the nozzles have also been performed. Measurements of the nozzle geometry show that all of the nozzle holes are offset from the axis of the needle and sac. This offset creates an asymmetry in the inlet condition of the nozzle hole, which varies from nozzle to nozzle. The nozzle profile deviates significantly from the nominal specification, with an abrupt convergence of the nozzle holes near the nozzle exit seen in all of the injectors. Nozzle diameter measurements show a smaller diameter than the nominal specification, with significant differences between the injectors. Needle lift measurements show oscillatory behavior in both the axial and lateral motions of the needle. The hydraulic characterization of the nozzles demonstrates the impact of internal geometry (outlet diameter) on momentum and mass flow rate. C1 [Kastengren, Alan L.] Argonne Natl Lab, XRay Sci Div, Argonne, IL 60439 USA. [Tilocco, F. Zak; Powell, Christopher F.] Argonne Natl Lab, Ctr Transportat Res, Argonne, IL 60439 USA. [Manin, Julien; Pickett, Lyle M.] Sandia Natl Labs, Combust Res Facil, Livermore, CA 94550 USA. [Payri, Raul] Univ Politecn Valencia, CMT Motores Termicos, Valencia, Spain. [Bazyn, Tim] Caterpillar Inc, Peoria, IL 61629 USA. RP Kastengren, AL (reprint author), Argonne Natl Lab, XRay Sci Div, 9700 S Cass Ave, Argonne, IL 60439 USA. EM akastengren@anl.gov RI Payri, Raul/B-3662-2009 OI Payri, Raul/0000-0001-7428-5510 FU U. S. Department of Energy [DE-AC02-06CH11357]; Department of Energy Vehicle Technologies Program; U.S. Department of Energy Vehicle Technologies Program; United States Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000] FX The phase-contrast x-ray imaging was performed at the 32ID beamline of the Advanced Photon Source, Argonne National Laboratory. The work performed at Argonne and the use of the APS are supported by the U. S. Department of Energy under Contract No. DE-AC02-06CH11357 and by the Department of Energy Vehicle Technologies Program, with Gurpreet Singh as Team Leader.; Sandia National Laboratories research was also supported by the U.S. Department of Energy Vehicle Technologies Program. Measurements were performed at the Combustion Research Facility in Livermore, California. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under Contract NoDE-AC04-94AL85000. NR 37 TC 38 Z9 38 U1 2 U2 18 PU BEGELL HOUSE INC PI REDDING PA 50 CROSS HIGHWAY, REDDING, CT 06896 USA SN 1044-5110 J9 ATOMIZATION SPRAY JI Atom. Sprays PY 2012 VL 22 IS 12 BP 1011 EP 1052 PG 42 WC Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA 153VW UT WOS:000319631600002 ER PT B AU Bailey, S Raffaelle, R AF Bailey, Sheila Raffaelle, Ryne BE McEvoy, A Markvart, T Castaner, L TI Operation of Solar Cells in a Space Environment SO PRACTICAL HANDBOOK OF PHOTOVOLTAICS: FUNDAMENTALS AND APPLICATIONS, 2ND EDITION LA English DT Article; Book Chapter C1 [Bailey, Sheila] NASA Glenn Res Ctr, Photovolta & Space Environm Branch, Cleveland, OH 44135 USA. [Raffaelle, Ryne] Natl Ctr Photovolta, NREL, Golden, CO 80401 USA. RP Bailey, S (reprint author), NASA Glenn Res Ctr, Photovolta & Space Environm Branch, Cleveland, OH 44135 USA. EM Sheila.Bailey@grc.nasa.gov; ryne_raffaelle@nrel.gov NR 26 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS BN 978-0-12-385935-8 PY 2012 BP 863 EP 880 PG 18 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BFD40 UT WOS:000319259600030 ER PT J AU Osterwald, CR AF Osterwald, Carl R. BE McEvoy, A Markvart, T Castaner, L TI Standards, Calibration, and Testing of PV Modules and Solar Cells SO PRACTICAL HANDBOOK OF PHOTOVOLTAICS: FUNDAMENTALS AND APPLICATIONS, 2ND EDITION LA English DT Article; Book Chapter ID PHOTOVOLTAIC MODULES; SPECTRAL RESPONSE; ELECTRICAL PERFORMANCE; DEVICE PERFORMANCE; UNCERTAINTY; SCALE; RELIABILITY; SIMULATORS; EFFICIENCY; ERRORS C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Osterwald, CR (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. EM carl.osterwald@nrel.gov NR 90 TC 2 Z9 2 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS BN 978-0-12-385935-8 PY 2012 BP 1045 EP 1069 PG 25 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BFD40 UT WOS:000319259600037 ER PT B AU Fthenakis, VM AF Fthenakis, Vasilis M. BE McEvoy, A Markvart, T Castaner, L TI Overview of Potential Hazards SO PRACTICAL HANDBOOK OF PHOTOVOLTAICS: FUNDAMENTALS AND APPLICATIONS, 2ND EDITION LA English DT Article; Book Chapter ID MODULES C1 Brookhaven Natl Lab, Dept Environm Sci, Natl PV EHS Assistance Ctr, Upton, NY 11973 USA. RP Fthenakis, VM (reprint author), Brookhaven Natl Lab, Dept Environm Sci, Natl PV EHS Assistance Ctr, Upton, NY 11973 USA. NR 16 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS BN 978-0-12-385935-8 PY 2012 BP 1083 EP 1096 PG 14 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BFD40 UT WOS:000319259600039 ER PT B AU Huang, L Chowdhury, DR Ramani, S Reiten, MT Luo, SN Azad, AK Taylor, AJ Chen, HT AF Huang, Li Chowdhury, Dibakar R. Ramani, Suchitra Reiten, Matthew T. Luo, Shengnian Azad, Abul K. Taylor, Antoinette J. Chen, Hou-Tong BE Cui, TJ Cheng, Q Jiang, WX Ma, HF Bao, D Tang, WX TI A novel approach to further decrease the thickness of ultrathin perfect metamaterial absorbers SO PROCEEDINGS OF THE 2012 INTERNATIONAL WORKSHOP ON METAMATERIALS (META) LA English DT Proceedings Paper CT International Workshop on Metamaterials (Meta) CY OCT 08-10, 2012 CL Nanjing, PEOPLES R CHINA SP IEEE, SE Univ, IEEE Nanjing Sect, IEEE AP-MTT-EMC Nanjing Joint Chapter, Minist Educ China, Natl Sci Fdn China, SE Univ, State Key Lab Millimeter Waves, Natl Key Lab Sci & Technol Test Phys & Numer Math ID BAND; ABSORPTION; DESIGN AB This work presents a novel approach to further decrease the thickness of the ultra thin perfect metamaterial absorbers by adjusting the geometric dimensions of the resonators. Both simulational and experimental results with a typical metamaterial absorber structure show that the thickness of the absorber decreases from similar to 8 mu m to similar to 4 mu m by increasing the width of the cross-resonator from 10 mu m to 40 mu m. The results can be well explained with the interference theory which shows that the near-unity absorption is due to a destructive interference of the multiple reflections in the metamaterial absorber. C1 [Huang, Li] Harbin Inst Technol, Dept Phys, Harbin 150001, Heilongjiang, Peoples R China. [Chowdhury, Dibakar R.; Ramani, Suchitra; Reiten, Matthew T.; Azad, Abul K.; Taylor, Antoinette J.; Chen, Hou-Tong] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA. [Luo, Shengnian] Los Alamos Natl Lab, P 25, Los Alamos, NM 87545 USA. RP Huang, L (reprint author), Harbin Inst Technol, Dept Phys, Harbin 150001, Heilongjiang, Peoples R China. EM lihuang2002@hit.edu.cn; chenht@lanl.gov FU Natural Science Foundation of China (NSFC) [10904023]; Los Alamos National Laboratory LDRD program; National Nuclear Security Administration of the U.S. Department of Energy [DE-AC5206NA25396] FX Li Huang acknowledges support from Natural Science Foundation of China (NSFC) under Grant No. 10904023. We acknowledge partial support from the Los Alamos National Laboratory LDRD program. This work was performed, in part, at the Center for Integrated Nanotechnologies, a U.S. Department of Energy, Office of Basic Energy Sciences user facility. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is operated by Los Alamos National Security, LLC, for the National Nuclear Security Administration of the U.S. Department of Energy under contract DE-AC5206NA25396. NR 19 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-2808-1; 978-1-4673-2806-7 PY 2012 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BFE31 UT WOS:000319392800006 ER PT S AU Haase, G AF Haase, Gaddi GP IEEE TI Reliability of low-k interconnect dielectrics SO 2012 IEEE INTERNATIONAL INTEGRATED RELIABILITY WORKSHOP FINAL REPORT SE IEEE International Integrated Reliability Workshop Final Report LA English DT Proceedings Paper CT IEEE International Integrated Reliability Workshop (IIRW) CY OCT 14-18, 2012 CL S Lake Tahoe, CA SP IEEE, IEEE Electron Devices Soc (EDS), IEEE Reliabil Soc C1 Sandia Natl Labs, Microsyst Sci & Technol, Livermore, CA 94550 USA. RP Haase, G (reprint author), Sandia Natl Labs, Microsyst Sci & Technol, Livermore, CA 94550 USA. EM gshaase@sandia.com NR 0 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1930-8841 BN 978-1-4673-2752-7 J9 INT INTEG REL WRKSP PY 2012 BP 35 EP 35 PG 1 WC Engineering, Electrical & Electronic SC Engineering GA BFE19 UT WOS:000319340400014 ER PT B AU Clark, K AF Clark, K. GP IEEE PES TI Overview of Subsynchronous Resonance Related Phenomena SO 2012 IEEE PES TRANSMISSION AND DISTRIBUTION CONFERENCE AND EXPOSITION (T&D) SE Transmission and Distribution Conference and Exposition LA English DT Proceedings Paper CT IEEE PES Transmission and Distribution Conference and Exposition CY MAY 07-10, 2012 CL Orlando, FL SP IEEE Power & Energy Soc DE Subsynchronous resonance; subsynchronous interaction; torsional interaction; wind turbine generators ID TORSIONAL INTERACTION; TESTS; HVDC AB This paper provides an overview of subsynchronous resonance, subsynchronous torsional interaction, and related phenomena. Beginning with the first, and only, case of shaft damage due to subsynchronous resonance, this paper also describes other types of potential torsional interaction as well as various methods of mitigation and protection. It ends with a description of the most recent concerns about subsynchronous interaction between series capacitors and wind turbine generators. C1 Natl Renewable Energy Lab, Transmiss & Grid Integrat Grp, Golden, CO USA. RP Clark, K (reprint author), Natl Renewable Energy Lab, Transmiss & Grid Integrat Grp, Golden, CO USA. EM kara.clark@nrel.gov NR 12 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1935-5 J9 TRANS DISTRIB CONF PY 2012 PG 3 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BEJ78 UT WOS:000317001100098 ER PT J AU Diao, RS Lu, S Ma, J AF Diao, Ruisheng Lu, Shuai Ma, Jian GP IEEE PES TI On Evaluating Cycling and Movement of Conventional Generators for Balancing Services with Large Solar Penetration SO 2012 IEEE PES TRANSMISSION AND DISTRIBUTION CONFERENCE AND EXPOSITION (T&D) SE Transmission and Distribution Conference and Exposition LA English DT Proceedings Paper CT IEEE PES Transmission and Distribution Conference and Exposition CY MAY 07-10, 2012 CL Orlando, FL SP IEEE Power & Energy Soc DE balancing requirement; conventional generator; cycling and movement; load following; regulation; renewable energy; solar integration AB The increasing uncertainty caused by a higher penetration level of renewable energy points to the need for sufficient balancing services to ensure secure operation. It is thus necessary to quantify these services accurately and evaluate the cycling and movement of conventional generators that provide load following and regulation services for optimal planning and scheduling of multiple resources. This paper first introduces a systematic approach to calculating load following and regulation requirements with a large amount of solar integration. Then, two methods to quantitatively determine the cycling of conventional generators are proposed: (1) mileage and number of directional changes in balancing service, and (2) ramp statistics (or half-cycle) analysis. The proposed methods are tested on the Nevada (NV) Energy power system model. Simulation results demonstrate a significant impact of increased solar capacity on balancing service and cycling of conventional generators. Busy hours are identified for different study scenarios with various solar penetration levels. This study provides a basis for evaluating the wear and tear of conventional generators in the solar integration process in the Nevada power system. C1 [Diao, Ruisheng; Lu, Shuai; Ma, Jian] Pacific NW Natl Lab, Richland, WA 99354 USA. RP Diao, RS (reprint author), Pacific NW Natl Lab, Richland, WA 99354 USA. EM ruisheng.diao@pnnl.gov; shuai.lu@pnnl.gov; jian.ma@pnnl.gov NR 9 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1935-5 J9 TRANS DISTRIB CONF PY 2012 PG 8 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BEJ78 UT WOS:000317001100244 ER PT J AU Du, PW Lu, N AF Du, Pengwei Lu, Ning GP IEEE PES TI appliance commitment for household load scheduling SO 2012 IEEE PES TRANSMISSION AND DISTRIBUTION CONFERENCE AND EXPOSITION (T&D) SE Transmission and Distribution Conference and Exposition LA English DT Proceedings Paper CT IEEE PES Transmission and Distribution Conference and Exposition CY MAY 07-10, 2012 CL Orlando, FL SP IEEE Power & Energy Soc C1 [Du, Pengwei] Pacific NW Natl Lab, Richland, WA 99352 USA. RP Du, PW (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd, Richland, WA 99352 USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1935-5 J9 TRANS DISTRIB CONF PY 2012 PG 1 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BEJ78 UT WOS:000317001100061 ER PT J AU Elizondo, MA Chen, YS Huang, ZY AF Elizondo, Marcelo A. Chen, Yousu Huang, Zhenyu GP IEEE PES TI Reliability Value of Fast State Estimation on Power Systems SO 2012 IEEE PES TRANSMISSION AND DISTRIBUTION CONFERENCE AND EXPOSITION (T&D) SE Transmission and Distribution Conference and Exposition LA English DT Proceedings Paper CT IEEE PES Transmission and Distribution Conference and Exposition CY MAY 07-10, 2012 CL Orlando, FL SP IEEE Power & Energy Soc DE Power system state estimation; cascading failure; power system security; and power system reliability AB Monitoring the state of a power system under stress is key to achieving reliable operation. State estimation and timely measurements become more important when applying and designing corrective control actions (manual and automatic) to arrest or mitigate cascading blackouts. The execution time of each process, including state estimation, should be as short as possible to allow for timely action. In this paper, we provide a methodology for estimating one of the components of value of faster and more frequent state estimation: the reliability value of state estimation to assist corrective control actions for arresting or mitigating cascading blackouts. We use an algorithm for estimating the time between successive line trips in a cascading failure. The algorithm combines power flow calculations with characteristics of the protection system to estimate the time between successive equipment trips. Using this algorithm, we illustrate the value of fast state estimation by calculating the time remaining for automatic or manual corrective actions after state estimation is finalized. C1 [Elizondo, Marcelo A.; Chen, Yousu; Huang, Zhenyu] Pacific NW Natl Lab, Richland, WA 99354 USA. RP Elizondo, MA (reprint author), Pacific NW Natl Lab, Richland, WA 99354 USA. EM marcelo.elizondo@pnnl.gov; yousu.chen@pnnl.gov; zhenyu.huang@pnnl.gov NR 19 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1935-5 J9 TRANS DISTRIB CONF PY 2012 PG 6 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BEJ78 UT WOS:000317001100236 ER PT J AU Etingov, PV Lu, S Guo, X Ma, J Makarov, YV Chadliev, V Salgo, R AF Etingov, P. V. Lu, S. Guo, X. Ma, J. Makarov, Y. V. Chadliev, V. Salgo, R. GP IEEE PES TI Identifying Challenging Operating Hours for Solar Integration in the NV Energy System SO 2012 IEEE PES TRANSMISSION AND DISTRIBUTION CONFERENCE AND EXPOSITION (T&D) SE Transmission and Distribution Conference and Exposition LA English DT Proceedings Paper CT IEEE PES Transmission and Distribution Conference and Exposition CY MAY 07-10, 2012 CL Orlando, FL SP IEEE Power & Energy Soc DE Solar Generation; Renewables Integration; Balancing Process; Load Following; Regulation AB In this paper, the ability of the Nevada (NV) Energy generation fleet to meet its system balancing requirements under different solar energy penetration scenarios is studied. System balancing requirements include capacity, ramp rate, and ramp duration requirements for load following and regulation. If, during some operating hours, system capability is insufficient to meet these requirements, there is certain probability that the balancing authority's control and reliability performance can be compromised. These operating hours are considered as "challenging" hours. Five different solar energy integration scenarios have been studied. Simulations have shown that the NV Energy system will be potentially able to accommodate up to 942 MW of solar photovoltaic (PV) generation. However, the existing generation scheduling procedure should be adjusted to make it happen. Fast-responsive peaker units need to be used more frequently to meet the increasing ramping requirements. Thus, the NV Energy system operational cost can increase. C1 [Etingov, P. V.; Lu, S.; Guo, X.; Ma, J.; Makarov, Y. V.] Pacific NW Natl Lab, Richland, WA 99352 USA. RP Etingov, PV (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM pavel.etingov@pnnl.gov; shuai.lu@pnnl.gov; xinxin.guo@pnnl.gov; jian.ma@pnnl.gov; yuri.makarov@pnnl.gov; VChadliev@nvenergy.com; RSalgo@nvenergy.com NR 15 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1935-5 J9 TRANS DISTRIB CONF PY 2012 PG 8 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BEJ78 UT WOS:000317001100287 ER PT J AU Li, YL Huang, ZY Zhou, N Lee, B Diao, RS Du, PW AF Li, Yulan Huang, Zhenyu Zhou, Ning Lee, Barry Diao, Ruisheng Du, Pengwei GP IEEE PES TI Application of Ensemble Kalman Filter in Power System State Tracking and Sensitivity Analysis SO 2012 IEEE PES TRANSMISSION AND DISTRIBUTION CONFERENCE AND EXPOSITION (T&D) SE Transmission and Distribution Conference and Exposition LA English DT Proceedings Paper CT IEEE PES Transmission and Distribution Conference and Exposition CY MAY 07-10, 2012 CL Orlando, FL SP IEEE Power & Energy Soc DE dynamic state tracking; ensemble Kalman filter; power system; sensitivity analysis ID MODEL; VALIDATION AB An ensemble Kalman filter (EnKF) method is proposed to track dynamic states of generators. The algorithm of the EnKF and its application to generator state tracking are presented in detail. The accuracy and sensitivity of the method are analyzed with respect to initial state errors, measurement noise, unknown fault locations, time steps and parameter errors. It is demonstrated through simulation studies that even with some errors in the parameters, the developed EnKF method can still effectively track generator dynamic states. C1 [Li, Yulan; Huang, Zhenyu; Zhou, Ning; Lee, Barry; Diao, Ruisheng; Du, Pengwei] Pacific NW Natl Lab, Richland, WA 99352 USA. RP Li, YL (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM yulan.li@pnnl.gov; zhenyu.huang@pnnl.gov; ning.zhou@pnnl.gov; barry.lee@pnnl.gov; ruisheng.diao@pnnl.gov; pengwei.du@pnnl.gov NR 13 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1935-5 J9 TRANS DISTRIB CONF PY 2012 PG 8 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BEJ78 UT WOS:000317001100094 ER PT J AU Lu, N Du, PW Guo, XX Greitzer, FL AF Lu, Ning Du, Pengwei Guo, Xinxin Greitzer, Frank L. GP IEEE PES TI Smart Meter Data Analysis SO 2012 IEEE PES TRANSMISSION AND DISTRIBUTION CONFERENCE AND EXPOSITION (T&D) SE Transmission and Distribution Conference and Exposition LA English DT Proceedings Paper CT IEEE PES Transmission and Distribution Conference and Exposition CY MAY 07-10, 2012 CL Orlando, FL SP IEEE Power & Energy Soc DE smart grid; distribution networks; power grid operation; information management systems; cyber security; integrated distribution energy management; interoperability; data integrity ID STATE-QUEUING MODEL AB This paper presents a thorough analysis of 15-minute residential meter data sets to identify possible value propositions of smart meter measurements. Meter measurements of 50 houses were used to derive a few key data signatures for several target applications such as identifying demand response potentials, detecting abnormal load behaviors, and fault diagnosis. Results showed that for different applications, the communication needs from meters to control centers, data storage capabilities, and the complexity of data processing intelligence varies significantly. Therefore, it is important to build a dynamic data signature database and optimize the distribution of data processing capability between local devices and control centers to avoid communication congestion and to identify problems early. This paper also demonstrates that high-resolution smart meter data can make distribution power grids more economical, reliable, and resilient. C1 [Lu, Ning; Du, Pengwei; Guo, Xinxin; Greitzer, Frank L.] Pacific NW Natl Lab, Richland, WA 99352 USA. RP Lu, N (reprint author), Pacific NW Natl Lab, POB 999,MSIN K1-85, Richland, WA 99352 USA. EM ning.lu@pnnl.gov; Pengwei.du@pnnl.gov; Xinxin.guo@pnnl.gov; frand.greitzer@pnnl.gov NR 11 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1935-5 J9 TRANS DISTRIB CONF PY 2012 PG 6 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BEJ78 UT WOS:000317001100198 ER PT J AU Ma, J Lu, S Hafen, RP Etingov, PV Makarov, YV Chadliev, V AF Ma, Jian Lu, Shuai Hafen, Ryan P. Etingov, Pavel V. Makarov, Yuri V. Chadliev, Vladimir GP IEEE PES TI The Impact of Solar Photovoltaic Generation on Balancing Requirements in the Southern Nevada System SO 2012 IEEE PES TRANSMISSION AND DISTRIBUTION CONFERENCE AND EXPOSITION (T&D) SE Transmission and Distribution Conference and Exposition LA English DT Proceedings Paper CT IEEE PES Transmission and Distribution Conference and Exposition CY MAY 07-10, 2012 CL Orlando, FL SP IEEE Power & Energy Soc DE Ancillary services; balancing requirements; load following; regulation; renewables integration; swinging door algorithm AB The impact of integrating large-scale solar photovoltaic (PV) generation on the balancing requirements in terms of regulation and load-following requirements in the southern Nevada balancing area is evaluated. The "swinging door" algorithm and the "probability box" method developed by Pacific Northwest National Laboratory (PNNL) were used to quantify the impact of large PV generation on the balancing requirements of the system operations. The system's actual scheduling, real-time dispatch and regulation processes were simulated. Different levels of distributed generation were also considered in the study. The impact of hourly solar PV generation forecast errors on regulation and load-following requirements was assessed. The sensitivity of balancing requirements with respect to real-time forecast errors of large PV generation was analyzed. C1 [Ma, Jian; Lu, Shuai; Hafen, Ryan P.; Etingov, Pavel V.; Makarov, Yuri V.] Pacific NW Natl Lab, Richland, WA 99352 USA. RP Ma, J (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM jian.ma@pnnl.gov; shuai.lu@pnnl.gov; ryan.hafen@pnnl.gov; pavel.etingov@pnnl.gov; yuri.makarov@pnnl.gov; vchadliev@nvenergy.com NR 11 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1935-5 J9 TRANS DISTRIB CONF PY 2012 PG 9 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BEJ78 UT WOS:000317001100192 ER PT J AU Schneider, KP Weaver, TF AF Schneider, K. P. Weaver, T. F. GP IEEE PES TI Volt-VAR Optimization on American Electric Power Feeders in Northeast Columbus SO 2012 IEEE PES TRANSMISSION AND DISTRIBUTION CONFERENCE AND EXPOSITION (T&D) SE Transmission and Distribution Conference and Exposition LA English DT Proceedings Paper CT IEEE PES Transmission and Distribution Conference and Exposition CY MAY 07-10, 2012 CL Orlando, FL SP IEEE Power & Energy Soc DE distribution system analysis; power system control; voltage control AB In 2007 American Electric Power launched the gridSMART (R) initiative with the goals of increasing efficiency of the electricity delivery system and improving service to the end-use customers. As part of the initiative, a coordinated Volt-VAR system was deployed on eleven distribution feeders at five substations in the Northeast Columbus Ohio Area. The goal of the coordinated Volt-VAR system was to decrease the amount of energy necessary to provide end-use customers with the same quality of service. The evaluation of the Volt-VAR system performance was conducted in two stages. The first stage was composed of simulation, analysis, and estimation, while the second stage was composed of analyzing collected field data. This panel paper will examine the analysis conducted in both stages and present the estimated improvements in system efficiency. C1 [Schneider, K. P.] Pacific NW Natl Lab, Battelle Seattle Res Ctr, Seattle, WA USA. RP Schneider, KP (reprint author), Pacific NW Natl Lab, Battelle Seattle Res Ctr, Seattle, WA USA. EM kevin.schneider@pnl.gov; tfweaver@aep.com NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1935-5 J9 TRANS DISTRIB CONF PY 2012 PG 8 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BEJ78 UT WOS:000317001100174 ER PT J AU Singh, R Diao, RS Cai, NN Huang, ZY Tuck, B Guo, XX AF Singh, Ruchi Diao, Ruisheng Cai, Niannian Huang, Zhenyu Tuck, Brian Guo, Xinxin GP IEEE PES TI Initial Studies Toward Real-Time Transmission Path Rating SO 2012 IEEE PES TRANSMISSION AND DISTRIBUTION CONFERENCE AND EXPOSITION (T&D) SE Transmission and Distribution Conference and Exposition LA English DT Proceedings Paper CT IEEE PES Transmission and Distribution Conference and Exposition CY MAY 07-10, 2012 CL Orlando, FL SP IEEE Power & Energy Soc DE real-time path rating; power system planning; thermal violation; total transfer capability; transient stability; voltage stability AB Demand continues to increase while transmission line construction is being constrained by multiple factors-economic, environmental, and political. Effective and efficient utilization of transmission lines is thus of great importance in an open access environment. Large blocks of power are transferred from areas with inexpensive generation to heavy load demand areas or areas with high generation costs. This results in some transmission paths being loaded closer to their path ratings, which limits further power transfer between areas. Traditionally, rating of important paths was determined off line by assuming the worst-case study scenario; once determined, it could be used for years. With increasing uncertainty arising from rapid growth of renewable energy and smart technologies, path rating studies are needed in near-real time to account for the latest system status and support a reliable and economic power grid. This paper adopts a simplified procedure based on standards of the North American Electric Reliability Corporation (NERC) to determine total transfer capability (TTC) or transfer limit for the purpose of demonstrating the benefits and necessity of real-time path rating. Initial studies are conducted to compute TTC of a two-area test system and a 39-bus test system. Results indicate that path rating can be significantly affected by loading conditions, generator schedules, system topology and other factors. C1 [Singh, Ruchi; Diao, Ruisheng; Huang, Zhenyu; Guo, Xinxin] Pacific NW Natl Lab, Richland, WA 99352 USA. RP Singh, R (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM ruchi.singh@pnnl.gov; ruisheng.diao@pnnl.gov; zhenyu.huang@pnnl.gov; batuck@bpa.gov; xinxin.guo@pnnl.gov NR 8 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1935-5 J9 TRANS DISTRIB CONF PY 2012 PG 7 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BEJ78 UT WOS:000317001100123 ER PT S AU Johnston, RG AF Johnston, Roger G. BE Flammini, F TI Physical vulnerability assessment SO CRITICAL INFRASTRUCTURE SECURITY: ASSESSMENT, PREVENTION, DETECTION, RESPONSE SE WIT Transactions on State of the Art in Science and Engineering LA English DT Article; Book Chapter DE Vulnerability Assessment; Threat Assessment; Security Maxims; Physical Security; Security Myths AB Effective infrastructure (security) Vulnerability Assessments require creative and resourceful personnel, whichever methods are employed. It is essential for vulnerability assessors to try to assume the mind-set of the adversaries and to look at vulnerabilities, attacks, and possible countermeasures from their perspective. Unfortunately, a lot of what passes for Vulnerability Assessments is actually Threat Assessment or relatively mundane checking of compliance with formal security regulations and guidelines. It is often highly unimaginative. Brainstorming is a powerful tool for helping, and there are a number of tips for enhancing its effectiveness. Vulnerability assessors also need to be alert to common security mistakes found in many organizations. They must try to avoid the widespread myths about security vulnerabilities and the common Vulnerability Assessment mistakes that hamper analysis. C1 Argonne Natl Lab, Nucl Engn Div, Vulnerabil Assessment Team, Argonne, IL 60439 USA. RP Johnston, RG (reprint author), Argonne Natl Lab, Nucl Engn Div, Vulnerabil Assessment Team, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 23 TC 0 Z9 0 U1 0 U2 0 PU WIT PRESS PI SOUTHAMPTON PA ASHURST LODGE, SOUTHAMPTON SO40 7AA, ASHURST, ENGLAND SN 1755-8336 BN 978-1-84564-562-5 J9 WIT T STATE ART SCI PY 2012 VL 54 BP 21 EP 36 PG 16 WC Computer Science, Information Systems SC Computer Science GA BEZ50 UT WOS:000318898700003 ER PT S AU Fox, EB Colon-Mercado, HR Chen, YX Ho, WSW AF Fox, Elise B. Colon-Mercado, Hector R. Chen, Yuanxin Ho, W. S. Winston BE Visser, AE Bridges, NJ Rogers, RD TI Development and Selection of Ionic Liquid Electrolytes for Hydroxide Conducting Polybenzimidazole Membranes in Alkaline Fuel Cells SO IONIC LIQUIDS: SCIENCE AND APPLICATIONS SE ACS Symposium Series LA English DT Proceedings Paper CT Symposium on Ionic Liquids - Science and Applications / 243rd National Spring Meeting of the American-Chemical-Society CY MAR 25-29, 2012 CL San Diego, CA SP Amer Chem Soc, Div Ind & Engn Chem, Amer Chem Soc ID EXCHANGE MEMBRANES; CARBON-DIOXIDE; AMINES; MATRIX; WATER; CO2 AB Alkaline fuel cell (AFC) operation is currently limited to specialty applications such as low temperatures and pure H-2/O-2 due to the corrosive nature of the electrolyte and formation of carbonates. AFCs are the cheapest and potentially most efficient (approaching 70%) fuel cells. The fact that non-Pt catalysts can be used, makes them an ideal low cost alternative for power production with respect to proton exchange membrane fuel cells. The anode and cathode are separated by a solid electrolyte or alkaline porous media saturated with KOH. However, CO2 from the atmosphere or fuel feed severely poisons the electrolyte by forming insoluble carbonates in the porous electrode. The corrosivity of KOH (electrolyte) limits operating temperatures to no more than 80 degrees C. This chapter examines the development of ionic liquids electrolytes that are less corrosive, have higher operating temperatures, do not chemically bond to CO2, and enable alternative fuels. Work is detailed on the IL selection and characterization as well as casting methods of the polybenzimidazole based solid membrane. This approach is novel as it targets the root of the problem (the electrolyte) unlike other current work in alkaline fuel cells which focus on making the fuel cell hardware more durable. C1 [Fox, Elise B.; Colon-Mercado, Hector R.] Savannah River Natl Lab, Aiken, SC 29808 USA. [Chen, Yuanxin; Ho, W. S. Winston] Ohio State Univ, Columbus, OH 43210 USA. RP Fox, EB (reprint author), Savannah River Natl Lab, Aiken, SC 29808 USA. EM elise.tox@srnl.doe.gov NR 31 TC 3 Z9 3 U1 1 U2 10 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 978-0-8412-2763-7 J9 ACS SYM SER JI ACS Symp. Ser. PY 2012 VL 1117 BP 129 EP + PG 3 WC Chemistry, Applied; Engineering, Chemical SC Chemistry; Engineering GA BFA68 UT WOS:000319021900005 ER PT S AU Visser, AE Bridges, NJ Garcia-Diaz, BL Gray, JR Fox, EB AF Visser, Ann E. Bridges, Nicholas J. Garcia-Diaz, Brenda L. Gray, Joshua R. Fox, Elise B. BE Visser, AE Bridges, NJ Rogers, RD TI Al2O3-Based Nanoparticle-Enhanced Ionic Liquids (NEILs) for Advanced Heat Transfer Fluids SO IONIC LIQUIDS: SCIENCE AND APPLICATIONS SE ACS Symposium Series LA English DT Proceedings Paper CT Symposium on Ionic Liquids - Science and Applications / 243rd National Spring Meeting of the American-Chemical-Society CY MAR 25-29, 2012 CL San Diego, CA SP Amer Chem Soc, Div Ind & Engn Chem, Amer Chem Soc ID THERMAL-CONDUCTIVITIES; TRANSPORT AB Herein we describe the chemical and physical properties of Nanoparticle Enhanced Ionic Liquids (NEILs) and highlight their potential as novel heat transfer fluids. The Ionic Liquids (ILs) contain the bis(trifluoromethylsulfonyl)imide or bis(perfluoroethylsulfonyl)imide anion and a variety of imidazolium cations. Alumina nanoparticles were added to ILs and increased the heat capacity above that for the ILs. This report discusses our current results with characterizing NEILs and evaluating the corrosion behavior of a target IL against common materials. C1 [Visser, Ann E.; Bridges, Nicholas J.; Garcia-Diaz, Brenda L.; Gray, Joshua R.; Fox, Elise B.] Savannah River Natl Lab, Aiken, SC 29808 USA. RP Visser, AE (reprint author), Savannah River Natl Lab, Savannah River Site, Aiken, SC 29808 USA. EM Elise.Fox@srnl.doe.gov NR 24 TC 1 Z9 1 U1 0 U2 3 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 978-0-8412-2763-7 J9 ACS SYM SER JI ACS Symp. Ser. PY 2012 VL 1117 BP 259 EP 270 PG 12 WC Chemistry, Applied; Engineering, Chemical SC Chemistry; Engineering GA BFA68 UT WOS:000319021900012 ER PT J AU Walsh, ST Marinakis, YD Curran, S Stinnette, R AF Walsh, Steven T. Marinakis, Yorgos D. Curran, Seamus Stinnette, Regan BE Kocaoglu, DF Anderson, TR Daim, TU TI The Disruptive Nature of Organic Photovoltaic Technology SO PICMET '12: PROCEEDINGS - TECHNOLOGY MANAGEMENT FOR EMERGING TECHNOLOGIES LA English DT Proceedings Paper CT Conference of PICMET - Technology Management for Emerging Technologies (PICMET) CY JUL 29-AUG 02, 2012 CL Vancouver, CANADA SP Portland State Univ, Maseeh Coll Engn & Comp Sci, Dept Engn & Technol Management, Portland State Univ, Tourism Vancouver, Portland Int Ctr Management Engn & Technol (PICMET) ID SOLAR-CELLS; MARKETS AB Organic photovoltaic (OPV) technology is identified as a disruptive innovation that will diffuse as a low end encroachment, i.e., as an innovation that sells to buyers in a new market who would have bought the old product only if it were a little less expensive such that they are on the fringe of buying (fringe disruptive); or as an innovation that sells to buyers whose preferences are so divergent that a price reduction would not have enticed them to buy the old product such that they are detached from the current market (detached disruptive). It is suggested that if a firm wants to implement a disruptive OPV innovation on the fringe of the market, it must engage in a market-focused strategy; and if a firm wants to implement a disruptive OPV innovation in a detached market, it must engage in a technology-focused strategy. C1 [Walsh, Steven T.] Univ New Mexico, Anderson Sch Management, Albuquerque, NM 87131 USA. [Marinakis, Yorgos D.] Law Off Yorgos Marinakis, Rio Rancho, NM 87144 USA. [Curran, Seamus] Univ Houston, Dept Phys, Houston, TX 77204 USA. [Stinnette, Regan] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Walsh, ST (reprint author), Univ New Mexico, Anderson Sch Management, Albuquerque, NM 87131 USA. NR 41 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-890843-26-7 PY 2012 BP 393 EP 399 PG 7 WC Engineering, Industrial; Management SC Engineering; Business & Economics GA BEL24 UT WOS:000317186400042 ER PT B AU Dongarra, J Ltaief, H Luszczek, P Weaver, VM AF Dongarra, Jack Ltaief, Hatem Luszczek, Piotr Weaver, Vincent M. BE Liu, J Chen, J Xu, G TI Energy Footprint of Advanced Dense Numerical Linear Algebra using Tile Algorithms on Multicore Architectures SO SECOND INTERNATIONAL CONFERENCE ON CLOUD AND GREEN COMPUTING / SECOND INTERNATIONAL CONFERENCE ON SOCIAL COMPUTING AND ITS APPLICATIONS (CGC/SCA 2012) LA English DT Proceedings Paper CT 2nd International Conference on Cloud and Green Computing / 2nd International Conference on Social Computing and its Applications (CGC/SCA) CY NOV 01-03, 2012 CL Xiangtan, PEOPLES R CHINA SP IEEE Comp Soc DE Power Consumption; Dense Linear Algebra; Mixed Precision Algorithms; Tree Reduction; Tile Algorithms; Dynamic Scheduling; PowerPack; RAPL ID MIXED PRECISION; SYSTEMS AB We propose to study the impact on the energy footprint of two advanced algorithmic strategies in the context of high performance dense linear algebra libraries: (1) mixed precision algorithms with iterative refinement allow to run at the peak performance of single precision floating-point arithmetic while achieving double precision accuracy and (2) tree reduction technique exposes more parallelism when factorizing tall and skinny matrices for solving overdetermined systems of linear equations or calculating the singular value decomposition. Integrated within the PLASMA library using tile algorithms, which will eventually supersede the block algorithms from LAPACK, both strategies further excel in performance in the presence of a dynamic task scheduler while targeting multicore architecture. Energy consumption measurements are reported along with parallel performance numbers on a dual-socket quad-core Intel Xeon as well as a quad-socket quad-core Intel Sandy Bridge chip, both providing component-based energy monitoring at all levels of the system, through the PowerPack framework and the Running Average Power Limit model, respectively. C1 [Dongarra, Jack; Luszczek, Piotr; Weaver, Vincent M.] Univ Tennessee, Innovat Comp Lab, Knoxville, TN 37996 USA. [Dongarra, Jack] Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN USA. [Dongarra, Jack] Univ Manchester, Sch Math Sch Comp Sci, Manchester, NH USA. [Dongarra, Jack] Natl Sci Fdn & Microsoft Research, Manchester, NH USA. [Ltaief, Hatem] KAUST Supercomputing Lab, Thuwal, Saudi Arabia. RP Dongarra, J (reprint author), Univ Tennessee, Innovat Comp Lab, Knoxville, TN 37996 USA. EM dongarra@eecs.utk.edu; Hatem.Ltaief@kaust.edu.sa; luszczek@eecs.utk.edu; vweaver1@eecs.utk.edu RI Dongarra, Jack/E-3987-2014; OI Ltaief, Hatem/0000-0002-6897-1095 NR 30 TC 10 Z9 10 U1 0 U2 5 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-0-7695-4864-7; 978-1-4673-3027-5 PY 2012 BP 274 EP 281 DI 10.1109/CGC.2012.113 PG 8 WC Computer Science, Hardware & Architecture; Computer Science, Information Systems; Computer Science, Theory & Methods SC Computer Science GA BEZ10 UT WOS:000318812400040 ER PT J AU May, D Blow, MJ Kaplan, T McCulley, DJ Jensen, BC Akiyama, JA Holt, A Plajzer-Frick, I Shoukry, M Wright, C Afzal, V Simpson, PC Rubin, EM Black, BL Bristow, J Pennacchio, LA Visel, A AF May, Dalit Blow, Matthew J. Kaplan, Tommy McCulley, David J. Jensen, Brian C. Akiyama, Jennifer A. Holt, Amy Plajzer-Frick, Ingrid Shoukry, Malak Wright, Crystal Afzal, Veena Simpson, Paul C. Rubin, Edward M. Black, Brian L. Bristow, James Pennacchio, Len A. Visel, Axel TI Large-scale discovery of enhancers from human heart tissue SO NATURE GENETICS LA English DT Article ID CORONARY-ARTERY-DISEASE; GENOME BROWSER DATABASE; TRANSCRIPTIONAL NETWORK; P300; ASSOCIATION; EXPRESSION; UPDATE; IDENTIFICATION; COACTIVATORS; ELEMENTS AB Development and function of the human heart depend on the dynamic control of tissue-specific gene expression by distant-acting transcriptional enhancers. To generate an accurate genome-wide map of human heart enhancers, we used an epigenomic enhancer discovery approach and identified similar to 6,200 candidate enhancer sequences directly from fetal and adult human heart tissue. Consistent with their predicted function, these elements were markedly enriched near genes implicated in heart development, function and disease. To further validate their in vivo enhancer activity, we tested 65 of these human sequences in a transgenic mouse enhancer assay and observed that 43 (66%) drove reproducible reporter gene expression in the heart. These results support the discovery of a genome-wide set of noncoding sequences highly enriched in human heart enhancers that is likely to facilitate downstream studies of the role of enhancers in development and pathological conditions of the heart. C1 [May, Dalit; Blow, Matthew J.; Akiyama, Jennifer A.; Holt, Amy; Plajzer-Frick, Ingrid; Shoukry, Malak; Afzal, Veena; Rubin, Edward M.; Bristow, James; Pennacchio, Len A.; Visel, Axel] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Genom Div, Berkeley, CA 94720 USA. [Blow, Matthew J.; Wright, Crystal; Rubin, Edward M.; Bristow, James; Pennacchio, Len A.; Visel, Axel] Joint Genome Inst, US Dept Energy, Walnut Creek, CA USA. [Kaplan, Tommy] Univ Calif Berkeley, Dept Mol & Cell Biol, Calif Inst Quantitat Biosci, Berkeley, CA 94720 USA. [Kaplan, Tommy] Hebrew Univ Jerusalem, Sch Comp Sci & Engn, Jerusalem, Israel. [McCulley, David J.; Simpson, Paul C.; Black, Brian L.] Univ Calif San Francisco, Cardiovasc Res Inst, San Francisco, CA 94143 USA. [Jensen, Brian C.] Univ Calif San Francisco, Div Cardiol, San Francisco, CA USA. [Simpson, Paul C.] Virginia Med Ctr, Div Cardiol, San Francisco, CA USA. RP Pennacchio, LA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Genom Div, Berkeley, CA 94720 USA. EM lapennacchio@lbl.gov; avisel@lbl.gov RI Blow, Matthew/G-6369-2012; Visel, Axel/A-9398-2009; OI Blow, Matthew/0000-0002-8844-9149; Visel, Axel/0000-0002-4130-7784; Black, Brian/0000-0002-6664-8913 FU National Human Genome Research Institute [HG003988]; National Heart, Lung, and Blood Institute (NHLBI) [HL64658, HL89707, HL096836]; European Molecular Biology Organization (EMBO); GlaxoSmithKline Research and Education Foundation for Cardiovascular Disease; University of California, San Francisco (UCSF) Foundation for Cardiac Research; Department of Veterans Affairs; Department of Energy [DE-AC02-05CH11231] FX The authors thank R. Hosseini and S. Phouanenavong for technical support, S. Deutsch for help in retrieving human genetic data and C. Attanasio and D. Dickel for critical comments on the manuscript. L. A. P. and A. V. were supported by a grant funded by the National Human Genome Research Institute (HG003988). B. L. B. was supported by grants from the National Heart, Lung, and Blood Institute (NHLBI, HL64658 and HL89707). D. M. and T. K. were supported by European Molecular Biology Organization (EMBO) long-term postdoctoral fellowships. B.C.J. was supported by the GlaxoSmithKline Research and Education Foundation for Cardiovascular Disease, University of California, San Francisco (UCSF) Foundation for Cardiac Research and a grant from the NHLBI (HL096836). P.C.S. was supported by the NHLBI and the Department of Veterans Affairs. Research was performed at Lawrence Berkeley National Laboratory and at the United States Department of Energy Joint Genome Institute (Department of Energy Contract DE-AC02-05CH11231, University of California). NR 42 TC 109 Z9 111 U1 0 U2 6 PU NATURE PUBLISHING GROUP PI NEW YORK PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA SN 1061-4036 J9 NAT GENET JI Nature Genet. PD JAN PY 2012 VL 44 IS 1 BP 89 EP U125 DI 10.1038/ng.1006 PG 7 WC Genetics & Heredity SC Genetics & Heredity GA 870JA UT WOS:000298664000020 PM 22138689 ER PT B AU Kocha, SS AF Kocha, Shyam S. BA Mench, MM Kumbur, EC Veziroglu, TN BF Mench, MM Kumbur, EC Veziroglu, TN TI Electrochemical Degradation: Electrocatalyst and Support Durability SO POLYMER ELECTROLYTE FUEL CELL DEGRADATION LA English DT Article; Book Chapter ID PEM FUEL-CELL; OXYGEN-REDUCTION REACTION; CONCENTRATED PHOSPHORIC-ACID; OXIDE-FILM FORMATION; RAY PHOTOELECTRON-SPECTROSCOPY; GAS-DIFFUSION ELECTRODES; GRAPHITIZED CARBON-BLACK; FE-BASED CATALYSTS; SURFACE-AREA LOSS; VOLTAGE HOLD TEST C1 [Kocha, Shyam S.] Nissan Tech Ctr North Amer, Fuel Cell Lab, Farmington Hills, MI USA. RP Kocha, SS (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 215 TC 25 Z9 25 U1 1 U2 4 PU ELSEVIER ACADEMIC PRESS INC PI SAN DIEGO PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 USA BN 978-0-12-386956-2; 978-0-12-386936-4 PY 2012 BP 89 EP 214 DI 10.1016/B978-0-12-386936-4.10003-X PG 126 WC Energy & Fuels SC Energy & Fuels GA BEW33 UT WOS:000318398400004 ER PT J AU Tawfik, H Hung, Y Mahajan, D AF Tawfik, Hazem Hung, Yue Mahajan, Devinder BA Mench, MM Kumbur, EC Veziroglu, TN BF Mench, MM Kumbur, EC Veziroglu, TN TI Bipolar Plate Durability and Challenges SO POLYMER ELECTROLYTE FUEL CELL DEGRADATION LA English DT Article; Book Chapter ID PEM FUEL-CELLS; NITRIDED STAINLESS-STEELS; CORROSION-RESISTANCE; CONTACT RESISTANCE; SIMULATED ANODE; CR-NITRIDES; FLOW-FIELD; ALLOYS; ENVIRONMENTS; BEHAVIOR C1 [Tawfik, Hazem; Hung, Yue] Farmingdale State Coll, Farmingdale, NY 11735 USA. [Tawfik, Hazem; Mahajan, Devinder] SUNY Stony Brook, Stony Brook, NY USA. [Tawfik, Hazem; Mahajan, Devinder] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Tawfik, H (reprint author), Farmingdale State Coll, Farmingdale, NY 11735 USA. NR 64 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER ACADEMIC PRESS INC PI SAN DIEGO PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 USA BN 978-0-12-386956-2 PY 2012 BP 249 EP 291 DI 10.1016/B978-0-12-386936-4.10005-3 PG 43 WC Energy & Fuels SC Energy & Fuels GA BEW33 UT WOS:000318398400006 ER PT S AU Colbaugh, R Glass, K AF Colbaugh, Richard Glass, Kristin GP IEEE TI Predictability-Oriented Defense Against Adaptive Adversaries SO PROCEEDINGS 2012 IEEE INTERNATIONAL CONFERENCE ON SYSTEMS, MAN, AND CYBERNETICS (SMC) SE IEEE International Conference on Systems Man and Cybernetics Conference Proceedings LA English DT Proceedings Paper CT IEEE International Conference on Systems, Man, and Cybernetics (SMC) CY OCT 14-17, 2012 CL Seoul, SOUTH KOREA SP IEEE Systems, Man, and Cybernetics Soc (SMC), IEEE, Korea Univ, Korean Soc Cognit Sci (KSCS), Korean Inst Informat Scientists and Engineers Soc Computat Intelligence (KSCI), Hi Seoul, Korea Tourism Org, Asian Off Aerosp Res and Dev (AOARD), Natl Res Fdn Korea (NRF), World Class Univ, Korea Univ, WCU Res Div Brain and Cognit Engn DE predictive defense; moving target defense; game theory; machine learning; adaptive adversaries; cyber security AB There are substantial potential benefits to considering predictability when designing defenses against adaptive adversaries, including increasing the ability of defense systems to predict new attacker behavior and reducing the capacity of adversaries to anticipate defensive actions. This paper adopts such a perspective, leveraging the coevolutionary relationship between attackers and defenders to derive methods for predicting and countering attacks and for limiting the extent to which adversaries can learn about defense strategies. The proposed approach combines game theory with machine learning to model adversary adaptation in the learner's feature space, thereby producing classes of predictive and "moving target" defenses which are scientifically-grounded and applicable to problems of real-world scale and complexity. Case studies with large cyber security datasets demonstrate that the proposed algorithms outperform gold-standard techniques, offering effective and robust defense against evolving adversaries. C1 [Colbaugh, Richard] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Colbaugh, R (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM colbaugh@comcast.net; kglass@icasa.nmt.edu NR 23 TC 5 Z9 5 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1062-922X BN 978-1-4673-1714-6 J9 IEEE SYS MAN CYBERN PY 2012 BP 2721 EP 2727 PG 7 WC Computer Science, Cybernetics; Computer Science, Information Systems; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ33 UT WOS:000316869202146 ER PT J AU Lee, E Lee, WC Asl, NM Kim, D Slater, M Johnson, C Kim, Y AF Lee, Eungje Lee, Wen Chao Asl, Nina Mahootcheian Kim, Donghan Slater, Michael Johnson, Christopher Kim, Youngsik TI Reversible NaVS2 (De)Intercalation Cathode for Na-Ion Batteries SO ECS ELECTROCHEMISTRY LETTERS LA English DT Article ID INTERCALATION COMPOUNDS; ELECTRODES; LI AB Reversible room temperature Na-(de) intercalation from NaxVS2 is achieved in the range of 0 < x < 1. The voltage curve and corresponding ex-situ X-ray diffraction analysis provided room temperature phase diagram of NaxVS2 showing phase transformation between O3-, P3-, and O1-type layered structures, as a function of sodium content x. This phase transformation accompanied by the Na-(de) intercalation was reversible with number of cycles. (C) 2012 The Electrochemical Society. All rights reserved. C1 [Lee, Eungje; Kim, Donghan; Slater, Michael; Johnson, Christopher] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA. [Lee, Wen Chao; Asl, Nina Mahootcheian; Kim, Youngsik] Indiana Univ Purdue Univ, Dept Mech Engn, Richard Lugar Ctr Renewable Energy, Indianapolis, IN 46202 USA. RP Lee, E (reprint author), Argonne Natl Lab, Chem Sci & Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA. EM cjohnson@anl.gov; yk35@iupui.edu RI Slater, Michael/D-5388-2012; Kim, Youngsik/B-3570-2014 FU Department of Energy [DE-AC02-06CH11357]; Research Support Funds grant (RSFG) and Multidisciplinary Undergraduate Research Institute (MURI) program at IUPUI FX Funding from the Department of Energy under Contract DE-AC02-06CH11357 is gratefully acknowledged.; The work performed in Indiana University Purdue University Indianapolis (IUPUI) was financially supported by the Research Support Funds grant (RSFG) and Multidisciplinary Undergraduate Research Institute (MURI) program at IUPUI. NR 10 TC 9 Z9 9 U1 2 U2 28 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA SN 2162-8726 J9 ECS ELECTROCHEM LETT JI ECS Electrochem. Lett. PY 2012 VL 1 IS 5 BP A71 EP A73 DI 10.1149/2.003205eel PG 3 WC Electrochemistry; Materials Science, Multidisciplinary SC Electrochemistry; Materials Science GA 138ZZ UT WOS:000318552300001 ER PT J AU Sun, CN Zawodzinski, TA AF Sun, Che-Nan Zawodzinski, Thomas A. TI Exploring Water Transport in PEFC Catalyst Layers SO ECS ELECTROCHEMISTRY LETTERS LA English DT Article ID ELECTROLYTE FUEL-CELLS; GAS-DIFFUSION ELECTRODES; NAFION CONTENT; CATHODE; PERFORMANCE; MEMBRANES; MANAGEMENT; IONOMER; MODEL AB Isolated composite catalyst layers (CLs) for fuel cells were prepared with the purpose of investigating the water behavior within the layer. H-1 diffusion coefficient and T-1 relaxation time in the CLs were successfully measured. This measurement informs discussion regarding long range diffusion and short range molecular interaction in the CLs at various hydration extents. The diffusion result suggests a somewhat tortuous water pathway in CLs, while the relaxation measurement indicates that chemical interaction between sulfonic acid group and water molecules may not be strongly affected by the presence of catalyzed carbon particles. (C) 2012 The Electrochemical Society. All rights reserved. C1 [Sun, Che-Nan] Case Western Reserve Univ, Dept Mat Sci & Engn, Cleveland, OH 44106 USA. [Zawodzinski, Thomas A.] Univ Tennessee, Dept Chem & Biomol Engn, Knoxville, TN 37996 USA. [Zawodzinski, Thomas A.] Oak Ridge Natl Lab, Phys Chem Mat Grp, Oak Ridge, TN 37830 USA. RP Sun, CN (reprint author), Case Western Reserve Univ, Dept Mat Sci & Engn, Cleveland, OH 44106 USA. EM tzawodzi@utk.edu RI Sun, Che-Nan/I-3871-2013 FU U.S. Department of Energy Office of Hydrogen and Infrastructure Technology FX We gratefully acknowledge the support of this work by the U.S. Department of Energy Office of Hydrogen and Infrastructure Technology under a subcontract to Los Alamos National Laboratory. NR 26 TC 1 Z9 1 U1 0 U2 14 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA SN 2162-8726 J9 ECS ELECTROCHEM LETT JI ECS Electrochem. Lett. PY 2012 VL 1 IS 5 BP F36 EP F39 DI 10.1149/2.010205eel PG 4 WC Electrochemistry; Materials Science, Multidisciplinary SC Electrochemistry; Materials Science GA 138ZZ UT WOS:000318552300007 ER PT J AU Li, CP Tenent, RC Dillon, AC Morrish, RM Wolden, CA AF Li, Chi-Ping Tenent, Robert C. Dillon, Anne C. Morrish, Rachel M. Wolden, Colin A. TI Improved Durability of WO3 Nanocomposite Films Using Atomic Layer and Vapor Deposited Coatings SO ECS ELECTROCHEMISTRY LETTERS LA English DT Article ID TUNGSTEN-OXIDE NANOPARTICLES; IMPROVED ELECTROCHROMIC APPLICATIONS; ULTRASONIC SPRAY DEPOSITION; THIN-FILMS; ION BATTERIES; PYROLYSIS; GROWTH; REDUCTION; XPS AB The durability of mesoporous films comprised of tungsten oxide nanoparticles was studied by monitoring their electrochromic performance during extended cycling in lithium perchlorate solution. Standard films rapidly lost charge capacity as nanoparticles detached from the film and were lost to solution. This issue was mitigated through the use of protection layers including evaporated LiAlF4 and alumina applied by atomic layer deposition (ALD). Three ALD cycles offered superior protection to 100 nm of LiAlF4, enabling >2500 cycles with no appreciable change in electrochromic performance. Moreover, the addition of these protection layers did not degrade the switching time as evidenced by their transient response to potential step changes. (C) 2012 The Electrochemical Society. All rights reserved. C1 [Li, Chi-Ping; Morrish, Rachel M.; Wolden, Colin A.] Colorado Sch Mines, Mat Sci Program, Golden, CO 80401 USA. [Li, Chi-Ping; Tenent, Robert C.; Dillon, Anne C.] Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Li, CP (reprint author), Colorado Sch Mines, Mat Sci Program, Golden, CO 80401 USA. EM cwolden@mines.edu FU National Science Foundation through the Renewable Energy Materials Research Science and Engineering Center [DMR-0820518]; Department of Energy through the DOE Office of Energy Efficiency and Renewable Energy, Office of Building Technologies Program from National Renewable Energy Laboratory [DE-AC36-08GO28308] FX We gratefully acknowledge the funding of National Science Foundation through the Renewable Energy Materials Research Science and Engineering Center (DMR-0820518) and the funding from the Department of Energy under subcontract DE-AC36-08GO28308 through the DOE Office of Energy Efficiency and Renewable Energy, Office of Building Technologies Program from National Renewable Energy Laboratory. We thank Dr. Arrelaine Dameron for assistance with ALD and Feng Lin for deposition of LiAlF4. NR 24 TC 7 Z9 7 U1 1 U2 25 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA SN 2162-8726 J9 ECS ELECTROCHEM LETT JI ECS Electrochem. Lett. PY 2012 VL 1 IS 5 BP H24 EP H27 DI 10.1149/2.002206eel PG 4 WC Electrochemistry; Materials Science, Multidisciplinary SC Electrochemistry; Materials Science GA 138ZZ UT WOS:000318552300010 ER PT S AU Kerbyson, DJ Barker, KJ Vishnu, A Hoisie, A AF Kerbyson, Darren J. Barker, Kevin J. Vishnu, Abhinav Hoisie, Adolfy GP IEEE TI Comparing the Performance of Blue Gene/Q with Leading Cray XE6 and InfiniBand Systems. SO PROCEEDINGS OF THE 2012 IEEE 18TH INTERNATIONAL CONFERENCE ON PARALLEL AND DISTRIBUTED SYSTEMS (ICPADS 2012) SE International Conference on Parallel and Distributed Systems - Proceedings LA English DT Proceedings Paper CT IEEE 18th International Conference on Parallel and Distributed Systems (ICPADS) CY DEC 17-19, 2012 CL Nanyang Technol Univ, Yunnan Garden Campus, Singapore, SINGAPORE SP IEEE, IEEE Comp Soc HO Nanyang Technol Univ, Yunnan Garden Campus DE High Performance Computing; Performance Evaluation; Performance Modeling; Application Analysis AB Three types of systems dominate the current High Performance Computing landscape: the Cray XE6, the IBM Blue Gene, and commodity clusters using InfiniBand. These systems have quite different characteristics making the choice for a particular deployment difficult. The XE6 uses Cray's proprietary Gemini 3-D torus interconnect with two nodes at each network endpoint. The latest IBM Blue Gene/Q uses a single socket integrating processor and communication in a 5-D torus network. InfiniBand provides the flexibility of using nodes from many vendors connected in many possible topologies. The performance characteristics of each vary vastly along with their utilization model. In this work we compare the performance of these three systems using a combination of micro-benchmarks and a set of production applications. We also discuss the causes of variability in performance across the systems and quantify where performance is lost using a combination of measurements and models. Our results show that significant performance can be lost in normal production operation of the Cray XE6 and InfiniBand Clusters in comparison to Blue Gene/Q. C1 [Kerbyson, Darren J.; Barker, Kevin J.; Vishnu, Abhinav; Hoisie, Adolfy] Pacific NW Natl Lab, PAL, Richland, WA 99352 USA. RP Kerbyson, DJ (reprint author), Pacific NW Natl Lab, PAL, Richland, WA 99352 USA. EM Darren.Kerbyson@pnnl.gov; Kevin.Barker@pnnl.gov; Abhinav.Vishnu@pnnl.gov; Adolfy.Hoisie@pnnl.gov NR 25 TC 3 Z9 3 U1 0 U2 11 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1521-9097 BN 978-1-4673-4565-1 J9 INT C PAR DISTRIB SY PY 2012 BP 556 EP 563 DI 10.1109/ICPADS.2012.81 PG 8 WC Computer Science, Hardware & Architecture SC Computer Science GA BEF20 UT WOS:000316367500071 ER PT S AU Alexeev, Y Mahajan, A Leyffer, S Fletcher, G Fedorov, DG AF Alexeev, Yuri Mahajan, Ashutosh Leyffer, Sven Fletcher, Graham Fedorov, Dmitri G. GP IEEE TI Heuristic Static Load-Balancing Algorithm Applied to the Fragment Molecular Orbital Method SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE DE Dynamic load balancing; static load balancing; heuristic algorithm; quantum chemistry; GAMESS; fragment molecular orbitals; FMO; optimization; MINLP; protein-ligand complex ID INTEGER NONLINEAR PROGRAMS; DISTRIBUTED DATA INTERFACE; OUTER-APPROXIMATION; METHOD FMO; CHEMISTRY; CLUSTER; SCHEME; GRAPHS AB In the era of petascale supercomputing, the importance of load balancing is crucial. Although dynamic load balancing is widespread, it is increasingly difficult to implement effectively with thousands of processors or more, prompting a second look at static load-balancing techniques even though the optimal allocation of tasks to processors is an NP-hard problem. We propose a heuristic static load-balancing algorithm, employing fitted benchmarking data, as an alternative to dynamic load balancing. The problem of allocating CPU cores to tasks is formulated as a mixed-integer nonlinear optimization problem, which is solved by using an optimization solver. On 163,840 cores of Blue Gene/P, we achieved a parallel efficiency of 80% for an execution of the fragment molecular orbital method applied to model protein-ligand complexes quantum-mechanically. The obtained allocation is shown to outperform dynamic load balancing by at least a factor of 2, thus motivating the use of this approach on other coarse-grained applications. C1 [Alexeev, Yuri; Mahajan, Ashutosh; Leyffer, Sven; Fletcher, Graham] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Fedorov, Dmitri G.] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 305, Japan. RP Alexeev, Y (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM yuri@alcf.anl.gov; mahajan@mcs.anl.gov; leyffer@mcs.anl.gov; fletcher@alcf.anl.gov; d.g.fedorov@aist.go.jp FU Nanoscience Program ( MEXT, Japan); Computational Materials Science Initiative ( CMSI, Japan) FX We thank Dr. R. Loy and ALCF team members for discussions and help related to the paper. We thank Dr. M. Mazanetz from Evotec for providing the PDB structure of Aurora- A kinase system used in our calculations. DGF thanks the Next Generation Super Computing Project, Nanoscience Program ( MEXT, Japan) and Computational Materials Science Initiative ( CMSI, Japan) for financial support and Prof. K. Kitaura for fruitful discussions. NR 64 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 13 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000086 ER PT S AU Baker, C Davidson, G Evans, TM Hamilton, S Jarrell, J Joubert, W AF Baker, C. Davidson, G. Evans, T. M. Hamilton, S. Jarrell, J. Joubert, W. GP IEEE TI High Performance Radiation Transport Simulations: Preparing for TITAN SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM) AB In this paper we describe the Denovo code system. Denovo solves the six-dimensional, steady-state, linear Boltzmann transport equation, of central importance to nuclear technology applications such as reactor core analysis (neutronics), radiation shielding, nuclear forensics and radiation detection. The code features multiple spatial differencing schemes, state-of-the-art linear solvers, the Koch-Baker-Alcouffe (KBA) parallel-wavefront sweep algorithm for inverting the transport operator, a new multilevel energy decomposition method scaling to hundreds of thousands of processing cores, and a modern, novel code architecture that supports straightforward integration of new features. In this paper we discuss the performance of Denovo on the 20+ petaflop ORNL GPU-based system, Titan. We describe algorithms and techniques used to exploit the capabilities of Titan's heterogeneous compute node architecture and the challenges of obtaining good parallel performance for this sparse hyperbolic PDE solver containing inherently sequential computations. Numerical results demonstrating Denovo performance on early Titan hardware are presented. C1 [Baker, C.; Davidson, G.; Evans, T. M.; Hamilton, S.; Jarrell, J.; Joubert, W.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Baker, C (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. NR 17 TC 0 Z9 0 U1 1 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2 J9 INT CONF HIGH PERFOR PY 2012 PG 10 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000068 ER PT S AU Bennett, JC Abbasi, H Bremer, PT Grout, R Gyulassy, A Jin, T Klasky, S Kolla, H Parashar, M Pascucci, V Pebay, P Thompson, D Yu, HF Zhang, F Chen, J AF Bennett, Janine C. Abbasi, Hasan Bremer, Peer-Timo Grout, Ray Gyulassy, Attila Jin, Tong Klasky, Scott Kolla, Hemanth Parashar, Manish Pascucci, Valerio Pebay, Philippe Thompson, David Yu, Hongfeng Zhang, Fan Chen, Jacqueline GP IEEE TI Combining In-situ and In-transit Processing to Enable Extreme-Scale Scientific Analysis SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE ID VISUALIZATION; SIMULATION; FIELDS AB With the onset of extreme-scale computing, I/O constraints make it increasingly difficult for scientists to save a sufficient amount of raw simulation data to persistent storage. One potential solution is to change the data analysis pipeline from a post-process centric to a concurrent approach based on either in-situ or in-transit processing. In this context computations are considered in-situ if they utilize the primary compute resources, while in-transit processing refers to offloading computations to a set of secondary resources using asynchronous data transfers. In this paper we explore the design and implementation of three common analysis techniques typically performed on large-scale scientific simulations: topological analysis, descriptive statistics, and visualization. We summarize algorithmic developments, describe a resource scheduling system to coordinate the execution of various analysis workflows, and discuss our implementation using the DataSpaces and ADIOS frameworks that support efficient data movement between in-situ and in-transit computations. We demonstrate the efficiency of our lightweight, flexible framework by deploying it on the Jaguar XK6 to analyze data generated by S3D, a massively parallel turbulent combustion code. Our framework allows scientists dealing with the data deluge at extreme scale to perform analyses at increased temporal resolutions, mitigate I/O costs, and significantly improve the time to insight. C1 [Bennett, Janine C.; Kolla, Hemanth; Yu, Hongfeng; Chen, Jacqueline] Sandia Natl Labs, Livermore, CA 94550 USA. [Abbasi, Hasan; Klasky, Scott] Oakridge Natl Lab, Oak Ridge, TN USA. [Bremer, Peer-Timo] Lawrence Livermore Natl Lab, Livermore, CA USA. [Grout, Ray] Natl Renewable Energy Lab, Golden, CO USA. [Gyulassy, Attila; Pascucci, Valerio] Univ Utah, Salt Lake City, UT USA. [Jin, Tong; Parashar, Manish; Zhang, Fan] Rutgers State Univ, Piscataway, NJ 08855 USA. [Pebay, Philippe; Thompson, David] Kitware, Clifton Park, NY USA. RP Bennett, JC (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA. RI Kolla, Hemanth/L-2142-2013 OI Kolla, Hemanth/0000-0003-4969-5870 FU US Department of Energy ( DOE); Lawrence Livermore National Laboratory [DE-AC52-07NA27344, LLNL-JRNL-412904L] FX This work was performed under the auspices of the US Department of Energy ( DOE) by the Lawrence Livermore National Laboratory under Contract Nos. DE-AC52-07NA27344, LLNL-JRNL-412904L. NR 46 TC 0 Z9 0 U1 1 U2 23 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 9 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000088 ER PT S AU Bhatele, A Gamblin, T Langer, SH Bremer, PT Draeger, EW Hamann, B Isaacs, KE Landge, AG Levine, JA Pascucci, V Schulz, M Still, CH AF Bhatele, Abhinav Gamblin, Todd Langer, Steven H. Bremer, Peer-Timo Draeger, Erik W. Hamann, Bernd Isaacs, Katherine E. Landge, Aaditya G. Levine, Joshua A. Pascucci, Valerio Schulz, Martin Still, Charles H. GP IEEE TI Mapping Applications with Collectives over Sub-communicators on Torus Networks SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE AB The placement of tasks in a parallel application on specific nodes of a supercomputer can significantly impact performance. Traditionally, this task mapping has focused on reducing the distance between communicating tasks on the physical network. This minimizes the number of hops that point-to-point messages travel and thus reduces link sharing between messages and contention. However, for applications that use collectives over sub-communicators, this heuristic may not be optimal. Many collectives can benefit from an increase in bandwidth even at the cost of an increase in hop count, especially when sending large messages. For example, placing communicating tasks in a cube configuration rather than a plane or a line on a torus network increases the number of possible paths messages might take. This increases the available bandwidth which can lead to significant performance gains. We have developed Rubik, a tool that provides a simple and intuitive interface to create a wide variety of mappings for structured communication patterns. Rubik supports a number of elementary operations such as splits, tilts, or shifts, that can be combined into a large number of unique patterns. Each operation can be applied to disjoint groups of processes involved in collectives to increase the effective bandwidth. We demonstrate the use of Rubik for improving performance of two parallel codes, pF3D and Qbox, which use collectives over sub-communicators. C1 [Bhatele, Abhinav; Gamblin, Todd; Langer, Steven H.; Bremer, Peer-Timo; Draeger, Erik W.; Schulz, Martin; Still, Charles H.] Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA. [Bremer, Peer-Timo; Landge, Aaditya G.; Levine, Joshua A.; Pascucci, Valerio] Univ Utah, Sci Comp & Imaging Inst, Salt Lake City, UT 84112 USA. [Hamann, Bernd; Isaacs, Katherine E.] Univ Calif Davis, Dept Comp Sci, Davis, CA 95616 USA. RP Bhatele, A (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA. FU Office of Science of the U. S. Department of Energy [DE- AC0206CH11357] FX which is supported by the Office of Science of the U. S. Department of Energy under contract DE- AC0206CH11357. NR 20 TC 0 Z9 0 U1 0 U2 5 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000026 ER PT S AU Bhatele, A Gamblin, T Isaacs, KE Gunney, BTN Schulz, M Bremer, PT Hamann, B AF Bhatele, Abhinav Gamblin, Todd Isaacs, Katherine E. Gunney, Brian T. N. Schulz, Martin Bremer, Peer-Timo Hamann, Bernd GP IEEE TI Novel Views of Performance Data to Analyze Large-scale Adaptive Applications SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE ID VISUALIZATION; TOOL AB Performance analysis of parallel scientific codes is becoming increasingly difficult due to the rapidly growing complexity of applications and architectures. Existing tools fall short in providing intuitive views that facilitate the process of performance debugging and tuning. In this paper, we extend recent ideas of projecting and visualizing performance data for faster, more intuitive analysis of applications. We collect detailed per-level and per-phase measurements for a dynamically load-balanced, structured AMR library and project per-core data collected in the hardware domain on to the application's communication topology. We show how our projections and visualizations lead to a rapid diagnosis of and mitigation strategy for a previously elusive scaling bottleneck in the library that is hard to detect using conventional tools. Our new insights have resulted in a 22% performance improvement for a 65,536-core run of the AMR library on an IBM Blue Gene/P system. C1 [Bhatele, Abhinav; Gamblin, Todd; Gunney, Brian T. N.; Schulz, Martin; Bremer, Peer-Timo] Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94551 USA. [Isaacs, Katherine E.; Hamann, Bernd] Univ Calif, Dept Comp Sci, Davis, CA USA. RP Bhatele, A (reprint author), Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA 94551 USA. EM bhatele@llnl.gov; tgamblin@llnl.gov; keisaacs@ucdavis.edu; gunneyb@llnl.gov; schulzm@llnl.gov; ptbremer@llnl.gov; hamann@cs.ucdavis.edu FU U.S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344, LLNL-CONF554552]; Office of Science of the U.S. Department of Energy [DE-AC0206CH11357] FX This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 (LLNL-CONF554552). Accordingly, the U.S. government retains a nonexclusive, royalty- free license to publish or reproduce the published form of this contribution, or allow others to do so, for U. S. government purposes.; Neither the U. S. government nor Lawrence Livermore National Security, LLC (LLNS), nor any of their employees makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, or process disclosed, or represents that its use would not infringe privately owned rights. The views and opinions of authors expressed herein do not necessarily state or reflect those of the U. S. government or LLNS, and shall not be used for advertising or product endorsement purposes.; An award of computer time was provided by the Innovative and Novel Computational Impact on Theory and Experiment (INCITE) program. This research used resources of the Argonne Leadership Computing Facility at Argonne National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under contract DE-AC0206CH11357. NR 19 TC 0 Z9 0 U1 0 U2 5 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000011 ER PT S AU Byna, S Chou, J Rubel, O Prabhat Karimabadi, H Daughton, WS Roytershteyn, V Bethel, EW Howison, M Hsu, KJ Lin, KW Shoshani, A Uselton, A Wu, KS AF Byna, Surendra Chou, Jerry Ruebel, Oliver Prabhat Karimabadi, Homa Daughton, William S. Roytershteyn, Vadim Bethel, E. Wes Howison, Mark Hsu, Ke-Jou Lin, Kuan-Wu Shoshani, Arie Uselton, Andrew Wu, Kesheng GP IEEE TI Parallel I/O, Analysis, and Visualization of a Trillion Particle Simulation SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE AB Petascale plasma physics simulations have recently entered the regime of simulating trillions of particles. These unprecedented simulations generate massive amounts of data, posing significant challenges in storage, analysis, and visualization. In this paper, we present parallel I/O, analysis, and visualization results from a VPIC trillion particle simulation running on 120,000 cores, which produces similar to 30TB of data for a single timestep. We demonstrate the successful application of H5Part, a particle data extension of parallel HDF5, for writing the dataset at a significant fraction of system peak I/O rates. To enable efficient analysis, we develop hybrid parallel FastQuery to index and query data using multi-core CPUs on distributed memory hardware. We show good scalability results for the FastQuery implementation using up to 10,000 cores. Finally, we apply this indexing/query-driven approach to facilitate the first-ever analysis and visualization of the trillion particle dataset. C1 [Byna, Surendra; Ruebel, Oliver; Prabhat; Bethel, E. Wes; Shoshani, Arie; Uselton, Andrew; Wu, Kesheng] Lawrence Berkeley Natl Lab, Berkeley, CA USA. [Chou, Jerry; Hsu, Ke-Jou] Tsinghua Univ, Beijing, Peoples R China. [Karimabadi, Homa; Roytershteyn, Vadim] Univ Calif San Diego, San Diego, CA USA. [Daughton, William S.] Los Alamos Natl Lab, Los Alamos, NM USA. [Howison, Mark] Brown Univ, Browns Mills, NJ USA. RP Byna, S (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA USA. EM sbyna@lbl.gov; jchou@cs.nthu.edu.tw; oruebel@lbl.gov; prabhat@lbl.gov; homakar@gmail.com; daughton@lanl.gov; vroytersh@gmail.com; ewbethel@lbl.gov; mhowison@brown.edu; vidcina@gmail.com; asymplone@gmail.com; shoshani@lbl.gov; acuselton@lbl.gov; kwu@lbl.gov RI Daughton, William/L-9661-2013 FU U.S. Department of Energy [DE-AC0205CH 11231]; National Science Foundation under NSF [OCI 0904734]; National Institute for Computational Sciences and by NASA (Pleiades); National Center for Computational Sciences at Oak Ridge National Laboratory (Jaguar FX This work was supported by the Director, Office of Science, Office of Advanced Scientific Computing Research, of the U.S. Department of Energy under Contract No. DE-AC0205CH 11231. This research was supported in part by National Science Foundation under NSF grant OCI 0904734. This research used resources of the National Energy Research Scientific Computing Center. Simulations were also supported by an allocation of advanced computing resources provided the NSF at the National Institute for Computational Sciences and by NASA (Pleiades), and the National Center for Computational Sciences at Oak Ridge National Laboratory (Jaguar).; The authors would like to thank NERSC and Cray staff for troubleshooting I/O issues on hopper. We would also like to thank members of the HDF Group for their advice on HDF5 I/O optimizations, and Burlen Loring for his advice and support. NR 45 TC 0 Z9 0 U1 0 U2 14 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 12 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000102 ER PT S AU Chhugani, J Kim, C Shukla, H Park, J Dubey, P Shalf, J Simon, HD AF Chhugani, Jatin Kim, Changkyu Shukla, Hemant Park, Jongsoo Dubey, Pradeep Shalf, John Simon, Horst D. GP IEEE TI Billion-Particle SIMD-Friendly Two-Point Correlation on Large-Scale HPC Cluster Systems SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE ID CHIP MULTIPROCESSORS; BIAS AB Two-point Correlation Function (TPCF) is widely used in astronomy to characterize the distribution of matter/energy in the Universe, and help derive the physics that can trace back to the creation of the universe. However, it is prohibitively slow for current sized datasets, and would continue to be a critical bottleneck with the trend of increasing dataset sizes to billions of particles and more, which makes TPCF a compelling benchmark application for future exa-scale architectures. State-of-the-art TPCF implementations do not map well to the underlying SIMD hardware, and also suffer from load-imbalance for large core counts. In this paper, we present a novel SIMD-friendly histogram update algorithm that exploits the spatial locality of histogram updates to achieve near-linear SIMD scaling. We also present a load-balancing scheme that combines domain-specific initial static division of work and dynamic task migration across nodes to effectively balance computation across nodes. Using Zin supercomputer at Lawrence Livermore National Laboratory (25,600 cores of Intel (R) Xeon (R) E5-2670, each with 256-bit SIMD), we achieve 90% parallel efficiency and 96% SIMD efficiency, and perform TPCF computation on a 1.7 billion particle dataset in 5.3 hours (at least 35x faster than previous approaches). In terms of cost per performance (measured in flops/$), we achieve at least an order-of-magnitude (11.1x) higher flops/$ as compared to the best known results [1]. Consequently, we now have line-of-sight to achieving the processing power for correlation computation to process billion+ particles telescopic data. C1 [Chhugani, Jatin; Kim, Changkyu; Park, Jongsoo; Dubey, Pradeep] Intel Corp, Parallel Comp Lab, Santa Clara, CA 95051 USA. [Shukla, Hemant; Shalf, John; Simon, Horst D.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Chhugani, J (reprint author), Intel Corp, Parallel Comp Lab, Santa Clara, CA 95051 USA. FU NSF [0961044] FX We would like to thank Dr. Ilian T. Iliev from University of Sussex for the input dataset. Hemant Shukla would like to acknowledge the ICCS project ISAAC funded through the NSF grant award # 0961044 under PI Dr. Horst Simon. We also thank Scott Futral and Robin Goldstone for running experiments on the Zin supercomputer at Lawrence Livermore National Laboratory, Scott Mcmillan for his help with the initial experiments and Prabhat for his insightful discussions on improving efficiency. NR 40 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000002 ER PT S AU Fiala, D Mueller, F Engelmann, C Riesen, R Ferreira, K Brightwell, R AF Fiala, David Mueller, Frank Engelmann, Christian Riesen, Rolf Ferreira, Kurt Brightwell, Ron GP IEEE TI Detection and Correction of Silent Data Corruption for Large-Scale High-Performance Computing SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE ID DESIGN; ERRORS AB Faults have become the norm rather than the exception for high-end computing clusters. Exacerbating this situation, some of these faults remain undetected, manifesting themselves as silent errors that allow applications to compute incorrect results. This paper studies the potential for redundancy to detect and correct soft errors in MPI message-passing applications while investigating the challenges inherent to detecting soft errors within MPIapplications by providing transparent MPI redundancy. By assuming a model wherein corruption in application data manifests itself by producing differing MPI messages between replicas, we study the best suited protocols for detecting and correcting corrupted MPI messages. Using our fault injector, we observe that even a single error can have profound effects on applications by causing a cascading pattern of corruption which in most cases spreads to all other processes. Results indicate that our consistency protocols can successfully protect applications experiencing even high rates of silent data corruption. C1 [Fiala, David; Mueller, Frank] North Carolina State Univ, Raleigh, NC 27695 USA. [Engelmann, Christian] Oak Ridge Natl Lab, Oak Ridge, TN USA. [Riesen, Rolf] IBM Corp, Dublin, Ireland. [Ferreira, Kurt; Brightwell, Ron] Sandia Natl Labs, Albuquerque, NM USA. RP Fiala, D (reprint author), North Carolina State Univ, Raleigh, NC 27695 USA. EM dfiala@ncsu.edu; fmuelle@ncsu.edu; engelmannc@ornl.gov; rolf.riesen@ie.ibm.com; kbferre@sandia.gov; rbbrigh@sandia.gov FU Laboratory Directed Research and Development Program of Oak Ridge National Laboratory; U.S. Department of Energy [De-AC05-00OR22725]; Enterprise Partnership Scheme grant - IBM; Irish Research Council for Science, Engineering & Technology (IRCSET); Industrial Development Agency (IDA) Ireland; U.S. Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000]; NSF [CNS-1058779, CNS-0958311] FX Research sponsored by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC for the U.S. Department of Energy under Contract No. De-AC05-00OR22725.; This research was partially supported by an Enterprise Partnership Scheme grant co-funded by IBM, the Irish Research Council for Science, Engineering & Technology (IRCSET), and the Industrial Development Agency (IDA) Ireland.; Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000.; This work was supported in part by NSF grants CNS-1058779, CNS-0958311. NR 37 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 12 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000045 ER PT S AU Gainaru, A Cappello, F Snir, M Kramer, W AF Gainaru, Ana Cappello, Franck Snir, Marc Kramer, William GP IEEE TI Fault prediction under the microscope: A closer look into HPC systems SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE DE fault tolerance; large-scale HPC systems; signal analysis; fault detection AB A large percentage of computing capacity in today's large high-performance computing systems is wasted because of failures. Consequently current research is focusing on providing fault tolerance strategies that aim to minimize fault's effects on applications. By far the most popular technique is the checkpoint-restart strategy. A complement to this classical approach is failure avoidance, by which the occurrence of a fault is predicted and preventive measures are taken. This requires a reliable prediction system to anticipate failures and their locations. Thus far, research in this field has used ideal predictors that were not implemented in real HPC systems. In this paper, we merge signal analysis concepts with data mining techniques to extend the ELSA (Event Log Signal Analyzer) toolkit and offer an adaptive and more efficient prediction module. Our goal is to provide models that characterize the normal behavior of a system and the way faults affect it. Being able to detect deviations from normality quickly is the foundation of accurate fault prediction. However, this is challenging because component failure dynamics are heterogeneous in space and time. To this end, a large part of the paper is focused on a detailed analysis of the prediction method, by applying it to two large-scale systems and by investigating the characteristics and bottlenecks of each step of the prediction process. Furthermore, we analyze the prediction's precision and recall impact on current checkpointing strategies and highlight future improvements and directions for research in this field. C1 [Gainaru, Ana] UIUC, Dept Comp Sci, Urbana, IL 61801 USA. [Cappello, Franck] INRIA, Paris, France. [Snir, Marc] MCS, ANL, Lemont, IL USA. [Kramer, William] UIUC, NCSA, Urbana, IL USA. RP Gainaru, A (reprint author), UIUC, Dept Comp Sci, Urbana, IL 61801 USA. EM againaru@illinois.edu; fci@lri.fr; snir@mcs.anl.gov; wkramer@ncsa.illinois.edu FU DOE [9J-30281-0008A]; INRIA-Illinois Joint Laboratory FX This work was supported in part by the DOE 9J-30281-0008A grant; and by the INRIA-Illinois Joint Laboratory for Petascale Computing. NR 31 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000047 ER PT S AU Garland, M Kudlur, M Zheng, YL AF Garland, Michael Kudlur, Manjunath Zheng, Yili GP IEEE TI Designing a Unified Programming Model for Heterogeneous Machines SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE AB While high-efficiency machines are increasingly embracing heterogeneous architectures and massive multithreading, contemporary mainstream programming languages reflect a mental model in which processing elements are homogeneous, concurrency is limited, and memory is a flat undifferentiated pool of storage. Moreover, the current state of the art in programming heterogeneous machines tends towards using separate programming models, such as OpenMP and CUDA, for different portions of the machine. Both of these factors make programming emerging heterogeneous machines unnecessarily difficult. We describe the design of the Phalanx programming model, which seeks to provide a unified programming model for heterogeneous machines. It provides constructs for bulk parallelism, synchronization, and data placement which operate across the entire machine. Our prototype implementation is able to launch and coordinate work on both CPU and GPU processors within a single node, and by leveraging the GASNet runtime, is able to run across all the nodes of a distributed-memory machine. C1 [Garland, Michael; Kudlur, Manjunath] NVIDIA, Santa Clara, CA 95050 USA. [Zheng, Yili] Lawrence Berkeley Natl Lab, Berkeley Hts, NJ USA. RP Garland, M (reprint author), NVIDIA, Santa Clara, CA 95050 USA. EM mgarland@nvidia.com; mkudlur@nvidia.com; yzheng@lbl.gov FU DARPA UHPC [HR0011-10-9-0008]; Office of Science of the U.S. Department of Energy [DE-AC02-06CH11357, DE-AC05-00OR22725, DE-AC02-05CH11231] FX This research was funded in part by the DARPA UHPC program under contract HR0011-10-9-0008. This research used resources of the Argonne Leadership Computing Facility at Argonne National Laboratory, the Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory, and the National Energy Research Scientific Computing Facility (NERSC) at Lawrence Berkeley National Laboratory, which are supported by the Office of Science of the U.S. Department of Energy under contracts DE-AC02-06CH11357, DE-AC05-00OR22725, and DE-AC02-05CH11231, respectively. NR 23 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000063 ER PT S AU Habib, S Morozov, V Finkel, H Pope, A Heitmann, K Kumaran, K Peterka, T Insley, J Daniel, D Fasel, P Frontiere, N Lukic, Z AF Habib, Salman Morozov, Vitali Finkel, Hal Pope, Adrian Heitmann, Katrin Kumaran, Kalyan Peterka, Tom Insley, Joe Daniel, David Fasel, Patricia Frontiere, Nicholas Lukic, Zarija GP IEEE TI The Universe at Extreme Scale: Multi-Petaflop Sky Simulation on the BG/Q SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE ID COSMOLOGICAL SIMULATIONS; CONSTRAINTS; MATTER; CODE AB Remarkable observational advances have established a compelling cross-validated model of the Universe. Yet, two key pillars of this model - dark matter and dark energy remain mysterious. Next-generation sky surveys will map billions of galaxies to explore the physics of the 'Dark Universe'. Science requirements for these surveys demand simulations at extreme scales; these will be delivered by the HACC (Hybrid/Hardware Accelerated Cosmology Code) framework. HACC's novel algorithmic structure allows tuning across diverse architectures, including accelerated and multi-core systems. On the IBM BG/Q, HACC attains unprecedented scalable performance - currently 6.23 PFlops at 62% of peak and 92% parallel efficiency on 786,432 cores (48 racks) - at extreme problem sizes with up to almost two trillion particles, larger than any cosmological simulation yet performed. HACC simulations at these scales will for the first time enable tracking individual galaxies over the entire volume of a cosmological survey. C1 [Habib, Salman; Morozov, Vitali; Finkel, Hal; Pope, Adrian; Heitmann, Katrin; Kumaran, Kalyan; Peterka, Tom; Insley, Joe] Argonne Natl Lab, Argonne, IL 60439 USA. [Lukic, Zarija] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Daniel, David; Fasel, Patricia; Frontiere, Nicholas] Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Habib, S (reprint author), Argonne Natl Lab, Argonne, IL 60439 USA. EM habib@anl.gov; morozov@anl.gov; hfinkel@anl.gov; apope@anl.gov; heitmann@anl.gov; kumaran@anl.gov; tpeterka@anl.gov; insley@anl.gov; ddd@lanl.gov; pkf@lanl.gov; frontiere@lanl.gov; zarija@lbl.gov FU DOE/SC [DE-AC02-06CH11357] FX We are indebted to Bob Walkup for running HACC on a prototype BG/Q system at IBM and to Dewey Dasher for help in arranging access. At ANL, we thank Susan Coghlan, Paul Messina, Mike Papka, Rick Stevens, and Tim Williams for obtaining allocations on different Blue Gene systems. At LLNL, we are grateful to Brian Carnes, Kim Cupps, David Fox, and Michel McCoy for providing access to Sequoia. We thank Ray Loy and Venkat Vishwanath for their contributions to system troubleshooting and parallel I/O. We acknowledge the efforts of the ALCF operations team for their assistance in running on Mira and the VEAS BG/Q system, in particular, to Paul Rich, Adam Scovel, Tisha Stacey, and William Scullin for their tireless efforts to keep Mira and VEAS up and running and helping us carry out the initial long- duration science test runs. This research used resources of the ALCF, which is supported by DOE/SC under contract DE-AC02-06CH11357. NR 39 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000004 ER PT S AU Hilbrich, T Protze, J Schulz, M de Supinski, BR Muller, MS AF Hilbrich, Tobias Protze, Joachim Schulz, Martin de Supinski, Bronis R. Mueller, Matthias S. GP IEEE TI MPI Runtime Error Detection with MUST: Advances in Deadlock Detection SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE AB The widely used Message Passing Interface (MPI) is complex and rich. As a result, application developers require automated tools to avoid and to detect MPI programming errors. We present the Marmot Umpire Scalable Tool (MUST) that detects such errors with significantly increased scalability. We present improvements to our graph-based deadlock detection approach for MPI, which cover future MPI extensions. Our enhancements also check complex MPI constructs that no previous graph-based detection approach handled correctly. Finally, we present optimizations for the processing of MPI operations that reduce runtime deadlock detection overheads. Existing approaches often require O(p) analysis time per MPI operation, for p processes. We empirically observe that our improvements lead to sub-linear or better analysis time per operation for a wide range of real world applications. C1 [Hilbrich, Tobias; Protze, Joachim; Mueller, Matthias S.] Tech Univ Dresden, ZIH, D-01062 Dresden, Germany. [Schulz, Martin; de Supinski, Bronis R.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Hilbrich, T (reprint author), Tech Univ Dresden, ZIH, D-01062 Dresden, Germany. EM tobias.hilbrich@tu-dresden.de; joachim.protze@tu-dresden.de; schulzm@llnl.gov; bronis@llnl.gov; matthias.mueller@tu-dresden.de FU U.S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344, LLNL-CONF-555978]; European Community's [ICT2011.9.13, 287703] FX Part of this work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. (LLNL-CONF-555978). This work has been supported by the CRESTA project that has received funding from the European Community's Seventh Framework Programme ( ICT2011.9.13) under Grant Agreement no. 287703. NR 15 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 10 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000010 ER PT S AU Jenkins, J Schendel, ER Lakshminarasimhan, S Boyuka, DA Rogers, T Ethier, S Ross, R Klasky, S Samatova, NF AF Jenkins, John Schendel, Eric R. Lakshminarasimhan, Sriram Boyuka, David A., II Rogers, Terry Ethier, Stephane Ross, Robert Klasky, Scott Samatova, Nagiza F. GP IEEE TI Byte-precision Level of Detail Processing for Variable Precision Analytics SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE AB I/O bottlenecks in HPC applications are becoming a more pressing problem as compute capabilities continue to outpace I/O capabilities. While double-precision simulation data often must be stored losslessly, the loss of some of the fractional component may introduce acceptably small errors to many types of scientific analyses. Given this observation, we develop a precision level of detail (APLOD) library, which partitions double-precision datasets along user-defined byte boundaries. APLOD parameterizes the analysis accuracy-I/O performance tradeoff, bounds maximum relative error, maintains I/O access patterns compared to full precision, and operates with low overhead. Using ADIOS as an I/O use-case, we show proportional reduction in disk access time to the degree of precision. Finally, we show the effects of partial precision analysis on accuracy for operations such as k-means and Fourier analysis, finding a strong applicability for the use of varying degrees of precision to reduce the cost of analyzing extreme-scale data. C1 [Jenkins, John; Schendel, Eric R.; Lakshminarasimhan, Sriram; Boyuka, David A., II; Rogers, Terry; Samatova, Nagiza F.] North Carolina State Univ, Raleigh, NC 27695 USA. [Jenkins, John; Schendel, Eric R.; Lakshminarasimhan, Sriram; Boyuka, David A., II; Rogers, Terry; Klasky, Scott; Samatova, Nagiza F.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [Ethier, Stephane] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. [Ross, Robert] Argonne Natl Lab, Argonne, IL 60439 USA. RP Samatova, NF (reprint author), North Carolina State Univ, Raleigh, NC 27695 USA. EM samatova@csc.ncsu.edu FU U. S. Department of Energy, Office of Science; U. S. National Science Foundation ( Expeditions in Computing) FX This work was supported in part by the U. S. Department of Energy, Office of Science and the U. S. National Science Foundation ( Expeditions in Computing). Oak Ridge National Laboratory is managed by UT- Battelle for the LLC U. S. D. O. E. under contract no. DEAC05- 00OR22725. NR 27 TC 0 Z9 0 U1 0 U2 8 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000087 ER PT S AU Kumar, S Vishwanath, V Carns, P Levine, JA Latham, R Scorzelli, G Kolla, H Grout, R Ross, R Papka, ME Chen, J Pascucci, V AF Kumar, Sidharth Vishwanath, Venkatram Carns, Philip Levine, Joshua A. Latham, Robert Scorzelli, Giorgio Kolla, Hemanth Grout, Ray Ross, Robert Papka, Michael E. Chen, Jacqueline Pascucci, Valerio GP IEEE TI Efficient Data Restructuring and Aggregation for I/O Acceleration in PIDX SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE AB Hierarchical, multiresolution data representations enable interactive analysis and visualization of large-scale simulations. One promising application of these techniques is to store high performance computing simulation output in a hierarchical Z (HZ) ordering that translates data from a Cartesian coordinate scheme to a one-dimensional array ordered by locality at different resolution levels. However, when the dimensions of the simulation data are not an even power of 2, parallel HZ ordering produces sparse memory and network access patterns that inhibit I/O performance. This work presents a new technique for parallel HZ ordering of simulation datasets that restructures simulation data into large (power of 2) blocks to facilitate efficient I/O aggregation. We perform both weak and strong scaling experiments using the S3D combustion application on both Cray-XE6 (65,536 cores) and IBM Blue Gene/P (131,072 cores) platforms. We demonstrate that data can be written in hierarchical, multiresolution format with performance competitive to that of native data-ordering methods. C1 [Kumar, Sidharth; Levine, Joshua A.; Scorzelli, Giorgio; Pascucci, Valerio] Univ Utah, Sci Comp & Imaging Inst, Salt Lake City, UT 84112 USA. [Vishwanath, Venkatram; Carns, Philip; Latham, Robert; Ross, Robert; Papka, Michael E.] Argonne Natl Lab, Argonne, IL USA. [Kolla, Hemanth; Chen, Jacqueline] Sandia Natl Labs, Livermore, CA USA. [Grout, Ray] Natl Renewable Energy Lab, Golden, CO USA. RP Kumar, S (reprint author), Univ Utah, Sci Comp & Imaging Inst, Salt Lake City, UT 84112 USA. RI Kolla, Hemanth/L-2142-2013 OI Kolla, Hemanth/0000-0003-4969-5870 FU Office of Advanced Scientific Computing Research, Office of Science, U. S. Dept. of Energy [DE-AC0206CH11357]; Argonne National Laboratory; Office of Science of the U. S. Department of Energy [DE-AC02-06CH11357, DE-AC02-05CH11231] FX This work was supported by the Office of Advanced Scientific Computing Research, Office of Science, U. S. Dept. of Energy, under Contract DE-AC0206CH11357 and an Argonne National Laboratory Director Fellowship. This research used resources of the Argonne Leadership Computing Facility at Argonne National Laboratory, which is supported by the Office of Science of the U. S. Department of Energy under contract DE-AC02-06CH11357. This research used resources of the National Energy Research Scientific Computing Center, which is supported by the Office of Science of the U. S. Department of Energy under Contract No. DE-AC02-05CH11231. NR 15 TC 0 Z9 0 U1 0 U2 13 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000089 ER PT S AU LaFon, J Misra, S Bringhurst, J AF LaFon, Jharrod Misra, Satyajayant Bringhurst, Jon GP IEEE TI On Distributed File Tree Walk of Parallel File Systems SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE DE File Systems; Metadata; Parallel Algorithms ID 1ST SEARCH; ALGORITHM; CLUSTERS AB Supercomputers generate vast amounts of data, typically organized into large directory hierarchies on parallel file systems. While the supercomputing applications are parallel, the tools used to process them requiring complete directory traversals, are typically serial. We present an algorithm framework and three fully distributed algorithms for traversing large parallel file systems, and performing file operations in parallel. The first algorithm introduces a randomized work-stealing scheduler; the second improves the first with proximity-awareness; and the third improves upon the second by using a hybrid approach. We have tested our implementation on Cielo, a 1.37 petaflop supercomputer at the Los Alamos National Laboratory and its 7 petabyte file system. Test results show that our algorithms execute orders of magnitude faster than state-of-the-art algorithms while achieving ideal load balancing and low communication cost. We present performance insights from the use of our algorithms in production systems at LANL, performing daily file system operations. C1 [LaFon, Jharrod; Misra, Satyajayant] New Mexico State Univ, Las Cruces, NM 88003 USA. [LaFon, Jharrod; Bringhurst, Jon] Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP LaFon, J (reprint author), New Mexico State Univ, Las Cruces, NM 88003 USA. NR 25 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000014 ER PT S AU Lee, S Vetter, JS AF Lee, Seyong Vetter, Jeffrey S. GP IEEE TI Early Evaluation of Directive-Based GPU Programming Models for Productive Exascale Computing SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE AB Graphics Processing Unit (GPU)-based parallel computer architectures have shown increased popularity as a building block for high performance computing, and possibly for future Exascale computing. However, their programming complexity remains as a major hurdle for their widespread adoption. To provide better abstractions for programming GPU architectures, researchers and vendors have proposed several directive-based GPU programming models. These directive-based models provide different levels of abstraction, and required different levels of programming effort to port and optimize applications. Understanding these differences among these new models provides valuable insights on their applicability and performance potential. In this paper, we evaluate existing directive-based models by porting thirteen application kernels from various scientific domains to use CUDA GPUs, which, in turn, allows us to identify important issues in the functionality, scalability, tunability, and debuggability of the existing models. Our evaluation shows that directive-based models can achieve reasonable performance, compared to hand-written GPU codes. C1 [Lee, Seyong] Oak Ridge Natl Lab, Oak Ridge, TN USA. [Vetter, Jeffrey S.] Georgia Inst Technol, Oak Ridge Natl Lab, Atlanta, GA 30332 USA. RP Lee, S (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN USA. EM lees2@ornl.gov; vetter@computer.org FU UT-Battelle, LLC [DE-AC05-00OR22725]; Office of Advanced Scientific Computing Research in the U.S. Department of Energy; National Science Foundation award [OCI-0910735] FX The paper has been authored by Oak Ridge National Laboratory, which is managed by UT-Battelle, LLC under Contract #DE-AC05-00OR22725 to the U.S. Government. Accordingly, the U.S. Government retains a non-exclusive, royalty-free license to publish or reproduce the published form of this contribution, or allow others to do so, for U.S. Government purposes. This research is sponsored in part by the Office of Advanced Scientific Computing Research in the U.S. Department of Energy and National Science Foundation award OCI-0910735. NR 21 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000050 ER PT S AU Levesque, JM Sankaran, R Grout, R AF Levesque, John M. Sankaran, Ramanan Grout, Ray GP IEEE TI Hybridizing S3D into an Exascale Application using OpenACC An approach for moving to Multi-Petaflops and Beyond SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE DE component; OpenMP; OpenACC; Accelerators; MPI; Directives; Multi-core; Communication overlap; Hybrid Architectures; Hybrid Programming AB Hybridization is the process of converting an application with a single level of parallelism to an application with multiple levels of parallelism. Over the past 15 years a majority of the applications that run on High Performance Computing systems have employed MPI for all of the parallelism within the application. In the Peta-Exascale computing regime, effective utilization of the hardware requires multiple levels of parallelism matched to the macro architecture of the system to achieve good performance. A hybridized code base is performance portable when sufficient parallelism is expressed in an architecture agnostic form to achieve good performance on a range of available systems. The hybridized S3D code is performance portable across today's leading many core and GPU accelerated systems. The OpenACC framework allows a unified code base to be deployed for either (Manycore CPU or Manycore CPU+GPU) while permitting architecture specific optimizations to expose new dimensions of parallelism to be utilized. C1 [Levesque, John M.] Cray Inc, CTO Off, Knoxville, TN 37932 USA. [Sankaran, Ramanan] Oak Ridge Natl Lab, Sci Comp Grp, Oak Ridge, TN USA. [Grout, Ray] Natl Renewable Energy Lab, Computat Sci Ctr, Golden, CO USA. RP Levesque, JM (reprint author), Cray Inc, CTO Off, Knoxville, TN 37932 USA. EM levesque@cray.com; sankaranr@ornl.gov; Ray.Grout@nrel.gov RI Sankaran, Ramanan/D-9254-2015 OI Sankaran, Ramanan/0000-0002-5352-9915 NR 9 TC 0 Z9 0 U1 0 U2 8 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000039 ER PT S AU Li, D Vetter, JS Yu, WK AF Li, Dong Vetter, Jeffrey S. Yu, Weikuan GP IEEE TI Classifying Soft Error Vulnerabilities in Extreme-Scale Scientific Applications Using a Binary Instrumentation Tool SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE AB Extreme-scale scientific applications are at a significant risk of being hit by soft errors on supercomputers as the scale of these systems and the component density continues to increase. In order to better understand the specific soft error vulnerabilities in scientific applications, we have built an empirical fault injection and consequence analysis tool - BIFIT - that allows us to evaluate how soft errors impact applications. In particular, BIFIT is designed with capability to inject faults at very specific targets: an arbitrarily-chosen execution point and any specific data structure. We apply BIFIT to three mission-critical scientific applications and investigate the applications vulnerability to soft errors by performing thousands of statistical tests. We, then, classify each applications individual data structures based on their sensitivity to these vulnerabilities, and generalize these classifications across applications. Subsequently, these classifications can be used to apply appropriate resiliency solutions to each data structure within an application. Our study reveals that these scientific applications have a wide range of sensitivities to both the time and the location of a soft error; yet, we are able to identify intrinsic relationships between application vulnerabilities and specific types of data objects. In this regard, BIFIT enables new opportunities for future resiliency research. C1 [Li, Dong] Oak Ridge Natl Lab, Oak Ridge, TN USA. [Vetter, Jeffrey S.] Georgia Inst Technol, Oak Ridge Natl Lab, Oak Ridge, TN USA. [Yu, Weikuan] Auburn Univ, Auburn, AL USA. RP Li, D (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN USA. EM lid1@ornl.gov; vetter@computer.org; wkyu@auburn.edu FU LLC [DE-AC05-00OR22725]; NSF [CNS-1059376]; Office of Advanced Scientific Computing Research in the U.S. Department of Energy FX The paper has been authored, in part, by Oak Ridge National Laboratory, which is managed by UT-Battelle, LLC under Contract # DE-AC05-00OR22725 to the U. S. Government. Accordingly, the U. S. Government retains a non-exclusive, royalty- free license to publish or reproduce the published form of this contribution, or allow others to do so, for U.S. Government purposes. This research is sponsored in part by an NSF award CNS-1059376, and by the Office of Advanced Scientific Computing Research in the U.S. Department of Energy. NR 36 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000096 ER PT S AU Liu, Z Veeraraghavan, M Yan, Z Tracy, C Tie, J Foster, I Dennis, J Hick, J Li, Y Yang, W AF Liu, Z. Veeraraghavan, M. Yan, Z. Tracy, C. Tie, J. Foster, I. Dennis, J. Hick, J. Li, Y. Yang, W. GP IEEE TI On using virtual circuits for GridFTP transfers SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE ID PERFORMANCE ANALYSIS; SYSTEMS; DESIGN AB The goal of this work is to characterize scientific data transfers and to determine the suitability of dynamic virtual circuit service for these transfers instead of the currently used IP-routed service. Specifically, logs collected by servers executing a commonly used scientific data transfer application, GridFTP, are obtained from three US super-computing/scientific research centers, NERSC, SLAC, and NCAR, and analyzed. Dynamic virtual circuit (VC) service, a relatively new offering from providers such as ESnet and Internet2, allows for the selection of a path on which a rate-guaranteed connection is established prior to data transfer. Given VC setup overhead, the first analysis of the GridFTP transfer logs characterizes the duration of sessions, where a session consists of multiple back-to-back transfers executed in batch mode between the same two GridFTP servers. Of the NCAR-NICS sessions analyzed, 56% of all sessions (90% of all transfers) would have been long enough to be served with dynamic VC service. An analysis of transfer logs across four paths, NCAR-NICS, SLAC-BNL, NERSC-ORNL and NERSC-ANL, shows significant throughput variance, where NICS, BNL, ORNL, and ANL are other US national laboratories. For example, on the NERSC-ORNL path, the inter-quartile range was 695 Mbps, with a maximum value of 3.64 Gbps and a minimum value of 758 Mbps. An analysis of the impact of various factors that are potential causes of this variance is also presented. C1 [Liu, Z.; Veeraraghavan, M.; Yan, Z.] Univ Virginia UVA, Charlottesville, VA 22904 USA. [Tracy, C.] Energy Sci Network, Berkeley, CA USA. [Tie, J.; Foster, I.] Univ Chicago, Chicago, IL 60637 USA. [Dennis, J.] NCAR, Boulder 80305, CO USA. [Hick, J.] NERSC, Berkeley, CA 94720 USA. [Li, Y.; Yang, W.] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Liu, Z (reprint author), Univ Virginia UVA, Charlottesville, VA 22904 USA. EM zl4ef@virginia.edu; mv5g@virginia.edu; zy4d@virginia.edu; ctracy@es.net; jtie@cs.uchicago.edu; foster@cs.uchicago.edu; dennis@ucar.edu; jhick@lbl.gov; ytl@slac.stanford.edu; yangw@slac.stanford.edu FU NSF [OCI-1038058, OCI-1127340, CNS-1116081, NSF01]; U.S. DOE [DE-SC0002350, DE-SC0007341, DE-AC02-06CH11357]; Director, Office of Science, Office of Basic Energy Sciences, of the U.S. DOE [DE-AC02-05CH11231]; NCAR [OCI-1127341]; Office of Science of the U.S. DOE [DE-AC02-05CH11231]; American Recovery and Reinvestment Act FX The authors thank Brent Draney and Jason Lee, NERSC, Jon Dugan and Joe Burrescia, ESnet, Joseph Bester and Stuart Martin, ANL, for helping us obtain the data analyzed in this work. The UVA portion was supported by NSF grants OCI-1038058, OCI-1127340, and CNS-1116081, and U.S. DOE grants DE-SC0002350 and DE-SC0007341. The ESnet portion was supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. DOE under Contract No. DE-AC02-05CH11231. The NCAR portion was supported through NSF Cooperative Grant NSF01 that funds NCAR, and through the grant OCI-1127341. The ANL portion was supported by the U.S. DOE, under Contract No. DE-AC02-06CH11357. This research used resources of the ESnet ANI Testbed, which is supported by the Office of Science of the U.S. DOE under contract DE-AC02-05CH11231, funded through the American Recovery and Reinvestment Act of 2009. NR 16 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000055 ER PT S AU Meng, JY Morozov, VA Vishwanath, V Kumaran, K AF Meng, Jiayuan Morozov, Vitali A. Vishwanath, Venkatram Kumaran, Kalyan GP IEEE TI Dataflow-Driven GPU Performance Projection for Multi-Kernel Transformations SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE AB Applications often have a sequence of parallel operations to be offloaded to graphics processors; each operation can become an individual GPU kernel. Developers typically explore a variety of transformations for each kernel. Furthermore, it is well known that efficient data management is critical in achieving high GPU performance and that "fusing" multiple kernels into one may greatly improve data locality. Doing so, however, requires transformations across multiple, potentially nested, parallel loops; at the same time, the original code semantics and data dependency must be preserved. Since each kernel may have distinct data access patterns, their combined dataflow can be nontrivial. As a result, the complexity of multi-kernel transformations often leads to significant effort with no guarantee of performance benefits. This paper proposes a dataflow-driven analytical framework to project GPU performance for a sequence of parallel operations. Users need only provide CPU code skeletons for a sequence of parallel loops. The framework can then automatically identify opportunities for multi-kernel transformations and data management. It is also able to project the overall performance without implementing GPU code or using physical hardware. C1 [Meng, Jiayuan; Morozov, Vitali A.; Vishwanath, Venkatram; Kumaran, Kalyan] Argonne Natl Lab, Argonne, IL 60439 USA. RP Meng, JY (reprint author), Argonne Natl Lab, Argonne, IL 60439 USA. EM jmeng@alcf.anl.gov; morozov@alcf.anl.gov; venkatv@alcf.anl.gov; kumaran@alcf.anl.gov NR 45 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000091 ER PT S AU Mirin, AA Richards, DF Glosli, JN Draeger, EW Chan, B Fattebert, JL Krauss, WD Oppelstrup, T Rice, JJ Gunnels, JA Gurev, V Kim, C Magerlein, J Reumann, M Wen, HF AF Mirin, Arthur A. Richards, David F. Glosli, James N. Draeger, Erik W. Chan, Bor Fattebert, Jean-luc Krauss, William D. Oppelstrup, Tomas Rice, John Jeremy Gunnels, John A. Gurev, Viatcheslav Kim, Changhoan Magerlein, John Reumann, Matthias Wen, Hui-Fang GP IEEE TI Toward Real-Time Modeling of Human Heart Ventricles at Cellular Resolution: Simulation of Drug-Induced Arrhythmias SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE ID SUDDEN CARDIAC DEATH; M-CELLS AB We have developed a highly efficient and scalable cardiac electrophysiology simulation capability that supports groundbreaking resolution and detail to elucidate the mechanisms of sudden cardiac death from arrhythmia. We can simulate thousands of heartbeats at a resolution of 0.1 mm, comparable to the size of cardiac cells, thereby enabling scientific inquiry not previously possible. Based on scaling results from the partially deployed Sequoia IBM Blue Gene/Q machine at Lawrence Livermore National Laboratory and planned optimizations, we estimate that by SC12 we will simulate 8-10 heartbeats per minute - a time-to-solution 400-500 times faster than the state-of-the-art. Performance between 8 and 11 PFlop/s on the full 1,572,864 cores is anticipated, representing 40-55 percent of peak. The power of the model is demonstrated by illuminating the subtle arrhythmogenic mechanisms of anti-arrhythmic drugs that paradoxically increase arrhythmias in some patient populations. C1 [Mirin, Arthur A.; Richards, David F.; Glosli, James N.; Draeger, Erik W.; Chan, Bor; Fattebert, Jean-luc; Krauss, William D.; Oppelstrup, Tomas] Lawrence Livermore Natl Lab, Livermore, CA USA. [Rice, John Jeremy; Gunnels, John A.; Gurev, Viatcheslav; Kim, Changhoan; Magerlein, John; Wen, Hui-Fang] IBM Corp, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA. [Reumann, Matthias] IBM Res Collaboratory Life Sci, Melbourne, Vic, Australia. RP Mirin, AA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA USA. FU U.S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]; LLNL [LLNL-CONF-553873] FX This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. This is LLNL report LLNL-CONF-553873. NR 23 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000001 ER PT S AU Nouanesengsy, B Lee, TY Lu, KW Shen, HW Peterka, T AF Nouanesengsy, Boonthanome Lee, Teng-Yok Lu, Kewei Shen, Han-Wei Peterka, Tom GP IEEE TI Parallel Particle Advection and FTLE Computation for Time-Varying Flow Fields SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE ID COHERENT STRUCTURES; VISUALIZATION; EFFICIENT; SURFACES AB Flow fields are an important product of scientific simulations. One popular flow visualization technique is particle advection, in which seeds are traced through the flow field. One use of these traces is to compute a powerful analysis tool called the Finite-Time Lyapunov Exponent (FTLE) field, but no existing particle tracing algorithms scale to the particle injection frequency required for high-resolution FTLE analysis. In this paper, a framework to trace the massive number of particles necessary for FTLE computation is presented. A new approach is explored, in which processes are divided into groups, and are responsible for mutually exclusive spans of time. This pipelining over time intervals reduces overall idle time of processes and decreases I/O overhead. Our parallel FTLE framework is capable of advecting hundreds of millions of particles at once, with performance scaling up to tens of thousands of processes. C1 [Nouanesengsy, Boonthanome; Lee, Teng-Yok; Lu, Kewei; Shen, Han-Wei] Ohio State Univ, Dept Comp Sci & Engn, Columbus, OH 43210 USA. [Peterka, Tom] Argonne Natl Lab, Div Comp Sci & Math, Argonne, IL 60439 USA. RP Nouanesengsy, B (reprint author), Ohio State Univ, Dept Comp Sci & Engn, Columbus, OH 43210 USA. EM nouanese@cse.ohio-state.edu; leeten@cse.ohio-state.edu; luke@cse.ohio-state.edu; hwshen@cse.ohio-state.edu; tpeterka@mcs.anl.gov RI Shen, Han-wei/A-4710-2012 FU U.S. Department of Energy [DE-AC0206CR11357, DOE-SC0005036]; NSF [IIS-1017635]; Battelle [137365]; Los Alamos National Laboratory [69552001-08]; Department of Energy SciDAC [DE-FC02-06ER25779] FX We would like to thank the National Center for Atmospheric Research for providing the datasets Isabel and Plume, Mathew Maltrud of Los Alamos National Laboratory for the dataset Ocean, and Samson Hagos and Ruby Leung of Pacific Northwest National Laboratory for providing the dataset Smhagos. This research used resources of the Argonne Leadership Computing Facility at Argonne National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy under contract DE-AC0206CR11357. This work was supported in part by NSF grant IIS-1017635, US Department of Energy DOE-SC0005036, Battelle Contract No. 137365, Los Alamos National Laboratory Contract No. 69552001-08, and Department of Energy SciDAC grant DE-FC02-06ER25779, program manager Lucy Nowell. NR 31 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000101 ER PT S AU Olivier, SL de Supinski, BR Schulz, M Prins, JF AF Olivier, Stephen L. de Supinski, Bronis R. Schulz, Martin Prins, Jan F. GP IEEE TI Characterizing and Mitigating Work Time Inflation in Task Parallel Programs SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE ID OPENMP 3.0; PERFORMANCE; LANGUAGE; DESIGN AB Task parallelism raises the level of abstraction in shared memory parallel programming to simplify the development of complex applications. However, task parallel applications can exhibit poor performance due to thread idleness, scheduling overheads, and work time inflation - additional time spent by threads in a multithreaded computation beyond the time required to perform the same work in a sequential computation. We identify the contributions of each factor to lost efficiency in various task parallel OpenMP applications and diagnose the causes of work time inflation in those applications. Increased data access latency can cause significant work time inflation in NUMA systems. Our locality framework for task parallel OpenMP programs mitigates this cause of work time inflation. Our extensions to the Qthreads library demonstrate that locality-aware scheduling can improve performance up to 3X compared to the Intel OpenMP task scheduler. C1 [Olivier, Stephen L.; Prins, Jan F.] Univ N Carolina, Dept Comp Sci, Chapel Hill, NC 27599 USA. [de Supinski, Bronis R.; Schulz, Martin] Lawrence Livermore Natl Lab, Lawrence, KS 94550 USA. RP Olivier, SL (reprint author), Univ N Carolina, Dept Comp Sci, Chapel Hill, NC 27599 USA. EM olivier@cs.unc.edu; bronis@llnl.gov; schulzm@llnl.gov; prins@cs.unc.edu NR 39 TC 0 Z9 0 U1 0 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 12 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000065 ER PT S AU Preissl, R Wong, TM Datta, P Flickner, M Singh, R Esser, SK Risk, WP Simon, HD Modha, DS AF Preissl, Robert Wong, Theodore M. Datta, Pallab Flickner, Myron Singh, Raghavendra Esser, Steven K. Risk, William P. Simon, Horst D. Modha, Dharmendra S. GP IEEE TI Compass: A scalable simulator for an architecture for Cognitive Computing SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE ID SPIKING NEURONS; BRAIN PROJECT; NEOCORTEX; NETWORKS; MATRICES; MODEL AB Inspired by the function, power, and volume of the organic brain, we are developing TrueNorth, a novel modular, non-von Neumann, ultra-low power, compact architecture. TrueNorth consists of a scalable network of neurosynaptic cores, with each core containing neurons, dendrites, synapses, and axons. To set sail for TrueNorth, we developed Compass, a multi-threaded, massively parallel functional simulator and a parallel compiler that maps a network of long-distance pathways in the macaque monkey brain to TrueNorth. We demonstrate near-perfect weak scaling on a 16 rack IBM (R) Blue Gene (R)/Q (262144 CPUs, 256 TB memory), achieving an unprecedented scale of 256 million neurosynaptic cores containing 65 billion neurons and 16 trillion synapses running only 388 x slower than real time with an average spiking rate of 8.1 Hz. By using emerging PGAS communication primitives, we also demonstrate 2 x better real-time performance over MPI primitives on a 4 rack Blue Gene/P (16384 CPUs, 16 TB memory). C1 [Preissl, Robert; Wong, Theodore M.; Datta, Pallab; Flickner, Myron; Singh, Raghavendra; Esser, Steven K.; Risk, William P.; Modha, Dharmendra S.] IBM Res Almaden, San Jose, CA 95120 USA. [Simon, Horst D.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Flickner, M (reprint author), IBM Res Almaden, San Jose, CA 95120 USA. EM mdflickner@us.ibm.com FU DARPA [HR0011-09-C-0002] FX This research was sponsored by DARPA under contract No. HR0011-09-C-0002. The views and conclusions contained herein are those of the authors and should not be interpreted as representing the official policies, either expressly or implied, of DARPA or the U. S. Government. NR 43 TC 0 Z9 0 U1 0 U2 5 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000084 ER PT S AU Ren, YF Li, T Yu, DT Jin, SD Robertazzi, T Tierney, BL Pouyoul, E AF Ren, Yufei Li, Tan Yu, Dantong Jin, Shudong Robertazzi, Thomas Tierney, Brian L. Pouyoul, Eric GP IEEE TI Protocols for Wide-Area Data-intensive Applications: Design and Performance Issues SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE AB Providing high-speed data transfer is vital to various data-intensive applications. While there have been remarkable technology advances to provide ultra-high-speed network bandwidth, existing protocols and applications may not be able to fully utilize the bare-metal bandwidth due to their inefficient design. We identify the same problem remains in the field of Remote Direct Memory Access (RDMA) networks. RDMA offloads TCP/IP protocols to hardware devices. However, its benefits have not been fully exploited due to the lack of efficient software and application protocols, in particular in wide-area networks. In this paper, we address the design choices to develop such protocols. We describe a protocol implemented as part of a communication middleware. The protocol has its flow control, connection management, and task synchronization. It maximizes the parallelism of RDMA operations. We demonstrate its performance benefit on various local and wide-area testbeds, including the DOE ANI testbed with RoCE links and InfiniBand links. C1 [Ren, Yufei; Li, Tan; Yu, Dantong; Jin, Shudong; Robertazzi, Thomas] SUNY Stony Brook, Dept Elect & Comp Engn, Stony Brook, NY 11794 USA. [Tierney, Brian L.; Pouyoul, Eric] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Ren, YF (reprint author), SUNY Stony Brook, Dept Elect & Comp Engn, Stony Brook, NY 11794 USA. EM yufren@ic.sunysb.edu; tanli@ic.sunysb.edu; dtyu@bnl.gov; shujin@notes.cc.sunysb.edu; tom@ece.sunysb.edu; btierney@lbl.gov; epouyoul@lbl.gov FU United States Department of Energy [DESC0003361]; Office of Science of the U. S. Department of Energy [DE-AC0205CH11231] FX This research is supported by United States Department of Energy, Grant No. DESC0003361. The ESnet Advanced Network Initiative (ANI) Testbed, which is supported by the Office of Science of the U. S. Department of Energy under contract DE-AC0205CH11231. Both contracts are funded through the The American Recovery and Reinvestment Act of 2009. NR 25 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000058 ER PT S AU Sarje, A Li, XYS Chourou, S Chan, ER Hexemer, A AF Sarje, Abhinav Li, Xiaoye S. Chourou, Slim Chan, Elaine R. Hexemer, Alexander GP IEEE TI Massively Parallel X-ray Scattering Simulations SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE AB Although present X-ray scattering techniques can provide tremendous information on the nano-structural properties of materials that are valuable in the design and fabrication of energy-relevant nano-devices, a primary challenge remains in the analyses of such data. In this paper we describe a high-performance, flexible, and scalable Grazing Incidence Small Angle X-ray Scattering simulation algorithm and codes that we have developed on multi-core/CPU and many-core/GPU clusters. We discuss in detail our implementation, optimization and performance on these platforms. Our results show speedups of similar to 125x on a Fermi-GPU and similar to 20x on a Cray-XE6 24-core node, compared to a sequential CPU code, with near linear scaling on multi-node clusters. To our knowledge, this is the first GISAXS simulation code that is flexible to compute scattered light intensities in all spatial directions allowing full reconstruction of GISAXS patterns for any complex structures and with high-resolutions while reducing simulation times from months to minutes. C1 [Sarje, Abhinav; Li, Xiaoye S.; Chourou, Slim] Lawrence Berkeley Natl Lab, Computat Res Div, Berkeley, CA 94720 USA. [Chan, Elaine R.; Hexemer, Alexander] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA. RP Sarje, A (reprint author), Lawrence Berkeley Natl Lab, Computat Res Div, Berkeley, CA 94720 USA. EM asarje@lbl.gov; xsli@lbl.gov; stchourou@lbl.gov; erchan@lbl.gov; ahexemer@lbl.gov FU Office of Science of the U. S. Department of Energy [DE-AC02-05CH11231, DE-AC05-00OR22725] FX We thank Samuel Williams for his input on code analysis. We used resources of the National Energy Research Scientific Computing Center, which along with this work is supported by the Office of Science of the U. S. Department of Energy under Contract No. DE-AC02-05CH11231. We also used resources of the Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory, which is supported by the Office of Science of the U. S. Department of Energy under Contract No. DE-AC05-00OR22725. NR 9 TC 0 Z9 0 U1 0 U2 5 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000066 ER PT S AU Sato, K Mohror, K Moody, A Gamblin, T de Supinski, BR Maruyama, N Matsuoka, S AF Sato, Kento Mohror, Kathryn Moody, Adam Gamblin, Todd de Supinski, Bronis R. Maruyama, Naoya Matsuoka, Satoshi GP IEEE TI Design and Modeling of a Non-blocking Checkpointing System SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE DE Fault tolerance; Checkpoint/Restart; Markov model AB As the capability and component count of systems increase, the MTBF decreases. Typically, applications tolerate failures with checkpoint/restart to a parallel file system (PFS). While simple, this approach can suffer from contention for PFS resources. Multi-level checkpointing is a promising solution. However, while multi-level checkpointing is successful on today's machines, it is not expected to be sufficient for exascale class machines, which are predicted to have orders of magnitude larger memory sizes and failure rates. Our solution combines the benefits of non-blocking and multi-level checkpointing. In this paper, we present the design of our system and model its performance. Our experiments show that our system can improve efficiency by 1.1 to 2.0 x on future machines. Additionally, applications using our checkpointing system can achieve high efficiency even when using a PFS with lower bandwidth. C1 [Sato, Kento] Tokyo Inst Technol, Dep Math & Comp Sci, Meguro Ku, 2-12-1-W8-33 Ohokayama, Tokyo 1528552, Japan. [Mohror, Kathryn; Moody, Adam; Gamblin, Todd; de Supinski, Bronis R.] Ctr Appl Sci Comp, Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. [Maruyama, Naoya] RIKEN, Adv Inst Computat Sci, Chuo Ku, Kobe, Hyogo 6500047, Japan. [Matsuoka, Satoshi] Tokyo Inst Technol, Global Sci Informat & Comp Ctr, Meguro Ku, Tokyo 1528552, Japan. RP Sato, K (reprint author), Tokyo Inst Technol, Dep Math & Comp Sci, Meguro Ku, 2-12-1-W8-33 Ohokayama, Tokyo 1528552, Japan. EM kent@matsulab.is.titech.ac.jp; kathryn@llnl.gov; moody20@llnl.gov; tgamblin@llnl.gov; bronis@llnl.gov; nmaruyama@riken.jp; matsu@is.titech.ac.jp FU U. S. Department of Energy [DE- AC5207NA27344]; United States Government [LLNL- CONF- 554431]; [24008253]; [23220003] FX This article has been authored by Lawrence Livermore National Security, LLC under Contract No. DE- AC5207NA27344 with the U. S. Department of Energy. Accordingly, the United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a a non- exclusive, paid- up, irrevocable, world- wide license to publish or reproduce the published form of this article or allow others to do so, for United States Government purposes ( LLNL- CONF- 554431). This work was also supported by Grant- in- Aid for Research Fellow of the Japan Society for the Promotion of Science ( JSPS Fellows) 24008253, and Grant- in- Aid for Scientific Research S 23220003. NR 16 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 10 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000021 ER PT S AU Schindewolf, M Bihari, B Gyllenhaal, J Schulz, M Wang, A Karl, W AF Schindewolf, Martin Bihari, Barna Gyllenhaal, John Schulz, Martin Wang, Amy Karl, Wolfgang GP IEEE TI What Scientific Applications Can Benefit from Hardware Transactional Memory? SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE ID OPENMP AB Achieving efficient and correct synchronization of multiple threads is a difficult and error-prone task at small scale and, as we march towards extreme scale computing, will be even more challenging when the resulting application is supposed to utilize millions of cores efficiently. Transactional Memory (TM) is a promising technique to ease the burden on the programmer, but only recently has become available on commercial hardware in the new Blue Gene/Q system and hence the real benefit for realistic applications has not been studied yet. This paper presents the first performance results of TM embedded into OpenMP on a prototype system of BG/Q and characterizes code properties that will likely lead to benefits when augmented with TM primitives. We first study the influence of thread count, environment variables and memory layout on TM performance and identify code properties that will yield performance gains with TM. Second, we evaluate the combination of OpenMP with multiple synchronization primitives on top of MPI to determine suitable task to thread ratios per node. Finally, we condense our findings into a set of best practices. These are applied to a Monte Carlo Benchmark and a Smoothed Particle Hydrodynamics method. In both cases an optimized TM version, executed with 64 threads on one node, outperforms a simple TM implementation. MCB with optimized TM yields a speedup of 27.45 over baseline. C1 [Schindewolf, Martin; Karl, Wolfgang] Karlsruhe Inst Technol, D-76021 Karlsruhe, Germany. [Schindewolf, Martin; Bihari, Barna; Gyllenhaal, John; Schulz, Martin] Lawrence Livermore Natl Lab, Lawrence, KS USA. [Wang, Amy] IBM Toronto, Toronto, ON, Canada. RP Schindewolf, M (reprint author), Karlsruhe Inst Technol, D-76021 Karlsruhe, Germany. EM schindewolf@kit.edu; bihari1@llnl.gov; gyllenhaal1@llnl.gov; schulzm@llnl.gov; aktwang@ca.ibm.com; karl@kit.edu NR 28 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000072 ER PT S AU Sharma, S Katramatos, D Yu, DT Shi, L AF Sharma, Sushant Katramatos, Dimitrios Yu, Dantong Shi, Li GP IEEE TI Design and Implementation of an Intelligent End-to-End Network QoS System SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE AB End-to-End guaranteed network QoS is a requirement for predictable data transfers between geographically distant end-hosts. Existing QoS systems, however, do not have the capability/intelligence to decide what resources to reserve and which paths to choose when there are multiple and flexible resource reservation requests. In this paper, we design and implement an intelligent system that can guarantee end-to-end network QoS for multiple flexible reservation requests. At the heart of this system is a polynomial time algorithm called resource reservation and path construction (RRPC). The RRPC algorithm schedules multiple flexible end-to-end data transfer requests by jointly optimizing the path construction and bandwidth reservation along these paths. We show that constructing such schedules is NP-hard. We implement our intelligent QoS system, and present the results of deployment on real world production networks (ESnet and Internet2). Our implementation does not require modifications or new software to be deployed on the routers within network. C1 [Sharma, Sushant; Katramatos, Dimitrios; Yu, Dantong] Brookhaven Natl Lab, Upton, NY 11973 USA. [Shi, Li] SUNY Stony Brook, Stony Brook, NY USA. RP Sharma, S (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 18 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000076 ER PT S AU Spafford, KL Vetter, JS AF Spafford, Kyle L. Vetter, Jeffrey S. GP IEEE TI Aspen: A Domain Specific Language for Performance Modeling SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE ID PARALLEL COMPUTATION; SYSTEMS AB We present a new approach to analytical performance modeling using Aspen, a domain specific langauge. Aspen (Abstract Scalable Performance Engineering Notation) fills an important gap in existing performance modeling techniques and is designed to enable rapid exploration of new algorithms and architectures. It includes a formal specification of an application's performance behavior and an abstract machine model. We provide an overview of Aspen's features and demonstrate how it can be used to express a performance model for a three dimensional Fast Fourier Transform. We then demonstrate the composability and modularity of Aspen by importing and reusing the FFT model in a molecular dynamics model. We have also created a number of tools that allow scientists to balance application and system factors quickly and accurately. C1 [Spafford, Kyle L.] Oak Ridge Natl Lab, Oak Ridge, TN 37748 USA. [Vetter, Jeffrey S.] Georgia Inst Technol, Oak Ridge Natl Lab, Oak Ridge, TN USA. RP Spafford, KL (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37748 USA. EM spaffordkl@ornl.gov; vetter@computer.org FU Office of Advanced Scientific Computing Research; U. S. Department of Energy and DARPA [HR0011-10-9-0008] FX This research is sponsored by the Office of Advanced Scientific Computing Research in the U. S. Department of Energy and DARPA contract HR0011-10-9-0008. The paper has been authored by Oak Ridge National Laboratory, which is managed by UT- Battelle, LLC under Contract DE-AC0500OR22725 to the U. S. Government. Accordingly, the U. S. Government retains a non- exclusive, royalty- free license to publish or reproduce the published form of this contribution, or allow others to do so, for U. S. Government purposes. NR 27 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000090 ER PT S AU Speck, R Ruprecht, D Krause, R Emmett, M Minion, M Winkel, M Gibbon, P AF Speck, R. Ruprecht, D. Krause, R. Emmett, M. Minion, M. Winkel, M. Gibbon, P. GP IEEE TI A massively space-time parllel N-body solver SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE ID ORDINARY DIFFERENTIAL-EQUATIONS; TREE-CODE; PARALLEL; PARAREAL; ALGORITHM; DISCRETIZATION; SIMULATIONS; INTEGRATORS; FLUID AB We present a novel space-time parallel version of the Barnes-Hut tree code PEPC using PFASST, the Parallel Full Approximation Scheme in Space and Time. The naive use of increasingly more processors for a fixed-size N-body problem is prone to saturate as soon as the number of unknowns per core becomes too small. To overcome this intrinsic strong-scaling limit, we introduce temporal parallelism on top of PEPC'S existing hybrid MPI/PThreads spatial decomposition. Here, we use PFASST which is based on a combination of the iterations of the parallel-in-time algorithm parareal with the sweeps of spectral deferred correction (SDC) schemes. By combining these sweeps with multiple space-time discretization levels, PFASST relaxes the theoretical bound on parallel efficiency in parareal. We present results from runs on up to 262,144 cores on the IBM Blue Gene/P installation JUGENE, demonstrating that the space-time parallel code provides speedup beyond the saturation of the purely space-parallel approach. C1 [Speck, R.; Ruprecht, D.; Krause, R.] Univ Svizzera Italiana, Inst Computat Sci, Lugano, Switzerland. [Emmett, M.] Lawrence Berkeley Natl Lab, Berkeley, CA USA. [Minion, M.] Stanford Univ, Inst Computat & Math Engn, Stanford, CA USA. [Winkel, M.; Gibbon, P.] Julich Supercomp Ctr, Julich, Germany. [Ruprecht, D.] Heinrich Heine Univ, Inst Math, D-40225 Dusseldorf, Germany. RP Speck, R (reprint author), Univ Svizzera Italiana, Inst Computat Sci, Lugano, Switzerland. EM robert.speck@usi.ch; daniel.ruprecht@usi.ch; rolf.krause@usi.ch; mwemmett@lbl.gov; mlminion@gmail.com; m.winkel@fz-juelich.de; p.gibbon@fz-juelich.de RI Gibbon, Paul/C-8811-2015; Ruprecht, Daniel/E-7564-2012 OI Gibbon, Paul/0000-0002-5540-9626; Ruprecht, Daniel/0000-0003-1904-2473 FU Swiss "High Performance and High Productivity Computing" [HP2C]; US Department of Energy; ExtreMe Matter Institute (EMMI); German Helmholtz Alliance [HA216]; Julich Supercomputing Centre [JZAM04] FX This research is partly funded by the Swiss High Performance and High Productivity Computing initiative HP2C, the US Department of Energy and the ExtreMe Matter Institute (EMMI) in the framework of the German Helmholtz Alliance HA216. Computing resources were provided by Julich Supercomputing Centre under project JZAM04. NR 33 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000082 ER PT S AU Subramoni, H Potluri, S Kandalla, K Barth, B Vienne, J Keasler, J Tomko, K Schulz, K Moody, A Panda, DK AF Subramoni, H. Potluri, S. Kandalla, K. Barth, B. Vienne, J. Keasler, J. Tomko, K. Schulz, K. Moody, A. Panda, D. K. GP IEEE TI Design of a Scalable InfiniBand Topology Service to Enable Network-Topology-Aware Placement of Processes SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE ID MAPPING PROBLEM; PARALLEL; ARCHITECTURES; ALGORITHMS; MPI AB Over the last decade, InfiniBand has become an increasingly popular interconnect for deploying modern supercomputing systems. However, there exists no detection service that can discover the underlying network topology in a scalable manner and expose this information to runtime libraries and users of the high performance computing systems in a convenient way. In this paper, we design a novel and scalable method to detect the InfiniBand network topology by using Neighbor-Joining techniques (NJ). To the best of our knowledge, this is the first instance where the neighbor joining algorithm has been applied to solve the problem of detecting InfiniBand network topology. We also design a network-topology-aware MPI library that takes advantage of the network topology service. The library places processes taking part in the MPI job in a network-topology-aware manner with the dual aim of increasing intra-node communication and reducing the long distance inter-node communication across the InfiniBand fabric. C1 [Subramoni, H.; Potluri, S.; Kandalla, K.; Vienne, J.; Panda, D. K.] Ohio State Univ, Dept Comp Sci & Engn, Columbus, OH 43210 USA. [Tomko, K.] Ohio Supercomputing Ctr, Columbus, OH USA. [Barth, B.; Schulz, K.] Texas Adv Comp Ctr, Austin, TX USA. [Keasler, J.; Moody, A.] Lawrence Livermore Natl Lab, Lawrence, KS USA. RP Subramoni, H (reprint author), Ohio State Univ, Dept Comp Sci & Engn, Columbus, OH 43210 USA. EM subramon@cse.ohio-state.edu; potluri@cse.ohio-state.edu; kandalla@cse.ohio-state.edu; bbarth@tacc.utexas.edu; viennej@cse.ohio-state.edu; keasler@llnl.gov; ktomko@osc.edu; karl@tacc.utexas.edu; moody20@llnl.gov; panda@cse.ohio-state.edu FU U. S. Department of Energy [DE-FC02-06ER25755]; National Science Foundation [CCF-0916302, OCI-0926691, OCI-0926574]; Teragrid [TG-CCR100034] FX This research is supported in part by U. S. Department of Energy grant # DE-FC02-06ER25755, National Science Foundation grants # CCF-0916302, # OCI-0926691, # OCI-0926574 and Teragrid # TG-CCR100034. This article has been authored by Lawrence Livermore National Security, LLC under Contract No. DE-AC52-07NA27344 with the U. S. Department of Energy. Accordingly, the United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, world- wide license to publish or reproduce the published form of this article or allow others to do so, for United States Government purposes. ( LLNL-CONF-564812) NR 34 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 12 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000075 ER PT S AU Sun, YH Zheng, GB Mei, C Bohm, EJ Phillips, JC Kale, LV Jones, TR AF Sun, Yanhua Zheng, Gengbin Mei, Chao Bohm, Eric J. Phillips, James C. Kale, Laximant V. Jones, Terry R. GP IEEE TI Optimizing Fine-grained Communication in a Biomolecular Simulation Application on Cray XK6 SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE AB Achieving good scaling for fine-grained communication intensive applications on modern supercomputers remains challenging. In our previous work, we have shown that such an application - NAMD - scales well on the full Jaguar XT5 without long-range interactions; Yet, with them, the speedup falters beyond 64K cores. Although the new Gemini interconnect on Cray XK6 has improved network performance, the challenges remain, and are likely to remain for other such networks as well. We analyze communication bottlenecks in NAMD and its CHARM++ runtime, using the Projections performance analysis tool. Based on the analysis, we optimize the runtime, built on the uGNI library for Gemini. We present several techniques to improve the fine-grained communication. Consequently, the performance of running 92224-atom Apoa1 with GPUs on TitanDev is improved by 36%. For 100-million-atom STMV, we improve upon the prior Jaguar XT5 result of 26 ms/step to 13 ms/step using 298,992 cores on Jaguar XK6. C1 [Sun, Yanhua; Zheng, Gengbin; Mei, Chao; Bohm, Eric J.; Phillips, James C.; Kale, Laximant V.] Univ Illinois, Urbana, IL 61801 USA. [Jones, Terry R.] Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. RP Sun, YH (reprint author), Univ Illinois, Urbana, IL 61801 USA. EM sun51@illinois.edu; gzheng@illinois.edu; chaomei2@illinois.edu; ebohm@illinois.edu; jcphill@illinois.edu; kale@illinois.edu; trjones@ornl.gov FU NIH [PHS 5 P41 RR05969-04]; NSF [OCI-0725070]; Blue Waters deployment, by the Institute for Advanced Computing Applications and Technologies ( IACAT); University of Illinois at Urbana- Champaign and by DOE ASCR [DE-SC0001845]; Office of Science of the U. S. Department of Energy [DE-AC05-00OR22725] FX This work was supported in part by a NIH Grant PHS 5 P41 RR05969-04 for Molecular Dynamics, by NSF grant OCI- 0725070 for Blue Waters deployment, by the Institute for Advanced Computing Applications and Technologies ( IACAT) at the University of Illinois at Urbana- Champaign and by DOE ASCR grant DE- SC0001845 for system software ( HPC Colony). This research used resources of the Oak Ridge Leadership Computing Facility at Oak Ridge National Laboratory, which is supported by the Office of Science of the U. S. Department of Energy under contract DE- AC05- 00OR22725. NR 22 TC 0 Z9 0 U1 0 U2 11 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000085 ER PT S AU Nguyen, T Cicotti, P Bylaska, E Dan, QL Baden, SB AF Tan Nguyen Cicotti, Pietro Bylaska, Eric Dan Quinlan Baden, Scott B. GP IEEE TI Bamboo - Translating MPI applications to a latency-tolerant, data-driven form SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE ID COMPUTATION; MODEL AB We present Bamboo, a custom source-to-source translator that transforms MPI C source into a data-driven form that automatically overlaps communication with available computation. Running on up to 98304 processors of NERSC's Hopper system, we observe that Bamboo's overlap capability speeds up MPI implementations of a 3D Jacobi iterative solver and Cannon's matrix multiplication. Bamboo's generated code meets or exceeds the performance of hand optimized MPI, which includes split-phase coding, the method classically employed to hide communication. We achieved our results with only modest amounts of programmer annotation and no intrusive reprogramming of the original application source. C1 [Tan Nguyen; Cicotti, Pietro; Baden, Scott B.] Univ Calif San Diego, Dept Comp Sci & Engn, La Jolla, CA 92093 USA. [Bylaska, Eric] Pacific Northwest Natl Lab, Environm Mol Sci Lab, Richland, WA 99354 USA. [Dan Quinlan] Lawrence Livermore Natl Lab, Ctr Adv Sci Comp, Livermore, CA 94550 USA. RP Nguyen, T (reprint author), Univ Calif San Diego, Dept Comp Sci & Engn, La Jolla, CA 92093 USA. EM nnguyent@ucsd.edu; pcicotti@sdsc.edu; Eric.Bylaska@pnnl.gov; quinlan1@llnl.gov; baden@ucsd.edu FU U. S. Department of Energy, Office of Science [DE- ER08- 191010356- 46564- 95715]; NSF [ACI0326013, CCF1017864]; Office of Science of the U. S. Department of Energy [DE- AC02- 05CH11231]; ASCR Petascale Tools Program [AC0576RL01830]; National Science Foundation DMS/ MRI [0821816] FX This research was supported in part by the Advanced Scientific Computing Research Petascale Tools Program of the U. S. Department of Energy, Office of Science, contract No. DE- ER08- 191010356- 46564- 95715 and in part by NSF contract ACI0326013. Tan Nguyen is a fellow of the Vietnam Education Foundation ( VEF), cohort 2009, and was supported in part by the VEF. Pietro Cicotti was also supported by NSF contract CCF1017864. This research used resources of the National Energy Research Scientific Computing Center, which is supported by the Office of Science of the U. S. Department of Energy under Contract No. DE- AC02- 05CH11231, and Teragrid resources provided by NCSA, ORNL and SDSC. Eric Bylaska and Dan Quinlan acknowledge support by the ASCR Petascale Tools Program Contract No. DE- AC0576RL01830. Support for computational resources housed in the Computer Science and Engineering Department at UCSD were supported by the National Science Foundation DMS/ MRI Award 0821816. NR 35 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000031 ER PT S AU Williams, S Kalamkar, DD Singh, A Deshpande, AM Van Straalen, B Smelyanskiy, M Almgren, A Dubey, P Shalf, J Oliker, L AF Williams, Samuel Kalamkar, Dhiraj D. Singh, Amik Deshpande, Anand M. Van Straalen, Brian Smelyanskiy, Mikhail Almgren, Ann Dubey, Pradeep Shalf, John Oliker, Leonid GP IEEE TI Optimization of Geometric Multigrid for Emerging Multi- and Manycore Processors SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE DE Geometric Multigrid; communication-avoiding; multicore; Xeon Phi; Knights Corner; OpenMP; auto-tuning ID STENCIL COMPUTATIONS AB Multigrid methods are widely used to accelerate the convergence of iterative solvers for linear systems used in a number of different application areas. In this paper, we explore optimization techniques for geometric multigrid on existing and emerging multicore systems including the Opteron-based Cray XE6, Intel (R) Xeon (R) E5-2670 and X5550 processor-based Infiniband clusters, as well as the new Intel (R) Xeon Phi (TM) coprocessor (Knights Corner). Our work examines a variety of novel techniques including communication-aggregation, threaded wavefront-based DRAM communication-avoiding, dynamic threading decisions, SIMDization, and fusion of operators. We quantify performance through each phase of the V-cycle for both single-node and distributed-memory experiments and provide detailed analysis for each class of optimization. Results show our optimizations yield significant speedups across a variety of subdomain sizes while simultaneously demonstrating the potential of multi- and manycore processors to dramatically accelerate single-node performance. However, our analysis also indicates that improvements in networks and communication will be essential to reap the potential of manycore processors in large-scale multigrid calculations. C1 [Williams, Samuel; Van Straalen, Brian; Almgren, Ann; Shalf, John; Oliker, Leonid] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Kalamkar, Dhiraj D.; Deshpande, Anand M.; Smelyanskiy, Mikhail; Dubey, Pradeep] Intel Corp, Santa Clara, CA USA. [Singh, Amik] Univ Calif Berkeley, Berkeley, CA 94720 USA. RP Williams, S (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. FU DOE Office of Advanced Scientific Computing Research [DE-AC02-05CH11231]; Office of Science of the U. S. Department of Energy [DE-AC02-05CH11231]; National Science Foundation [0910847, 0910735]; Gordon: A Data Intensive Supercomputer [1053575]; Extreme Science and Engineering Discovery Environment ( XSEDE) FX Authors from Lawrence Berkeley National Laboratory were supported by the DOE Office of Advanced Scientific Computing Research under contract number DE- AC02- 05CH11231. This research used resources of the National Energy Research Scientific Computing Center, which is supported by the Office of Science of the U. S. Department of Energy under Contract No. DE- AC02- 05CH11231. This work was supported in part by National Science Foundation grants: OCI # 0910847, Gordon: A Data Intensive Supercomputer; and OCI # 1053575, Extreme Science and Engineering Discovery Environment ( XSEDE). This research used resources of the Keeneland Computing Facility at the Georgia Institute of Technology, which is supported by the National Science Foundation under Contract OCI- 0910735. NR 27 TC 0 Z9 0 U1 0 U2 5 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000094 ER PT S AU Zhang, Z Katz, DS Wozniak, JM Espinosa, A Foster, I AF Zhang, Zhao Katz, Daniel S. Wozniak, Justin M. Espinosa, Allan Foster, Ian GP IEEE TI Design and Analysis of Data Management in Scalable Parallel Scripting SO 2012 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING, NETWORKING, STORAGE AND ANALYSIS (SC) SE International Conference for High Performance Computing Networking Storage and Analysis LA English DT Proceedings Paper CT 25th ACM/IEEE International Conference for High Performance Computing, Networking, Storage and Analysis (SC) CY NOV 10-16, 2012 CL Salt Lake City, UT SP IEEE Comp Soc, Assoc Comp Machinery (ACM), IEEE ID OPERATIONS; MPICH AB We seek to enable efficient large-scale parallel execution of applications in which a shared filesystem abstraction is used to couple many tasks. Such parallel scripting (many-task computing, MTC) applications suffer poor performance and utilization on large parallel computers because of the volume of filesystem I/O and a lack of appropriate optimizations in the shared filesystem. Thus, we design and implement a scalable MTC data management system that uses aggregated compute node local storage for more efficient data movement strategies. We co-design the data management system with the data-aware scheduler to enable dataflow pattern identification and automatic optimization. The framework reduces the time to solution of parallel stages of an astronomy data analysis application, Montage, by 83.2% on 512 cores; decreases the time to solution of a seismology application, CyberShake, by 7.9% on 2,048 cores; and delivers BLAST performance better than mpiBLAST at various scales up to 32,768 cores, while preserving the flexibility of the original BLAST application. C1 [Zhang, Zhao; Espinosa, Allan; Foster, Ian] Univ Chicago, Dept Comp Sci, Chicago, IL 60637 USA. [Katz, Daniel S.; Foster, Ian] Argonne Natl Lab, Computat Inst, Argonne, IL 60439 USA. [Wozniak, Justin M.; Foster, Ian] Argonne Natl Lab, Math & Comp Sci Div, Argonne, IL 60439 USA. RP Zhang, Z (reprint author), Univ Chicago, Dept Comp Sci, Chicago, IL 60637 USA. FU U.S. Department of Energy [DESC0005380, DE-AC02-06CH11357]; National Science Foundation while working at the Foundation FX This work was supported in part by the U.S. Department of Energy under the ASCR X-Stack program (contract DESC0005380) and contract DE-AC02-06CH11357. Computing resources were provided by the Argonne Leadership Computing Facility. We thank Dr. David Mathog (Caltech) for his support with parallel BLAST, and the ALCF support team. Work by Katz was supported by the National Science Foundation while working at the Foundation. Any opinion, finding, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. NR 32 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2167-4329 BN 978-1-4673-0805-2; 978-1-4673-0804-5 J9 INT CONF HIGH PERFOR PY 2012 PG 11 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ46 UT WOS:000316911000015 ER PT J AU Xiao, N Li, N Li, DY Tian, D Liu, RQ Wu, G AF Xiao, Ning Li, Ning Li, Deyu Tian, Dong Liu, Ruiqing Wu, Gang TI The Synergistic Effect between a Triblock Copolymer and Chloride Ions in Cu Electrodeposition into Microvias SO ECS SOLID STATE LETTERS LA English DT Article ID COPPER ELECTRODEPOSITION; POLYETHYLENE-GLYCOL; PEG; SPS; INHIBITION; BEHAVIOR; CL AB Interactions between a triblock copolymer, commercially named Pluronic L64, and chloride ions (Cl-) was found efficient for Cu electrodeposition in microvia filling process. Cyclic voltammetry (CV) curves clearly showed the synergistic effect between L64 and Cl- to inhibit copper electrodeposition. CV stripping measurements further suggested that the possible synergistic effect was dependent on the concentrations of L64 and Cl-. With a fixed L64 concentration (>= 7.5 ppm), there was a proper Cl- concentration to achieve the maximum synergistic effect. Haring cell experiments confirmed that the results obtained from CV stripping tests can be used for guiding microvia filling experiments. (C) 2012 The Electrochemical Society. C1 [Xiao, Ning; Li, Ning; Li, Deyu; Tian, Dong; Liu, Ruiqing] Harbin Inst Technol, Dept Appl Chem, Harbin 150001, Peoples R China. [Wu, Gang] Los Alamos Natl Lab, Mat Phys & Appl Div, Los Alamos, NM 87545 USA. RP Xiao, N (reprint author), Harbin Inst Technol, Dept Appl Chem, Harbin 150001, Peoples R China. EM lininghit@263.net RI Wu, Gang/E-8536-2010 OI Wu, Gang/0000-0003-4956-5208 FU Highnic Group (China) FX This work was financially supported by Highnic Group (China). The authors gratefully acknowledge Sun Jie for her support to this work. NR 15 TC 4 Z9 5 U1 1 U2 15 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA SN 2162-8742 J9 ECS SOLID STATE LETT JI ECS Solid State Lett. PY 2012 VL 1 IS 5 BP P67 EP P69 DI 10.1149/2.008205ssl PG 3 WC Materials Science, Multidisciplinary; Physics, Applied SC Materials Science; Physics GA 136DI UT WOS:000318341000003 ER PT S AU Cheeseman, M Bowden, M Akinci, A Knowles, S Webb, L AF Cheeseman, M. Bowden, M. Akinci, A. Knowles, S. Webb, L. BE Exarhos, GJ Gruzdev, VE Menapace, JA Ristau, D Soileau, MJ TI Neutron testing of high-power optical fibers SO LASER-INDUCED DAMAGE IN OPTICAL MATERIALS: 2012 SE Proceedings of SPIE LA English DT Proceedings Paper CT 44th Annual Laser Damage Symposium on Laser-Induced Damage in Optical Materials CY SEP 23-26, 2012 CL Natl Inst Stand & Technol (NIST), Boulder, CO SP SPIE, Lawrence Livermore Natl Lab, Spica Technologies, Inc, ATFilms, Precis Photon, IDEX Opt&Photon, Arrow Thin Films, Veeco, Lab Laser Energet, Alpine Res Opt, Rocky Mt Instruments HO Natl Inst Stand & Technol (NIST) DE ACRR; Optical fibers/fibres; Transient radiation; neutron radiation; high optical power AB A selection of commercially available high-power optical fibres have been characterised for radiation susceptibility in Sandia's Annular Core Research Reactor (ACRR). The fibres were subjected to a total gamma and neutron dose >2 Mrad(Si) in a 7 ms pulse. The neutron fluence was >10(15) n/cm(2). Changes in the transmission characteristics of optical fibres carrying high energy, short duration laser pulses (power densities of around 1.5 GW/cm(2)) were measured. All fibres survived at least two consecutive radiation exposures, showing typical transient transmission losses of around 20%. Post radiation exposure, the transmission characteristics returned to those of pristine fibres within one minute. C1 [Cheeseman, M.; Bowden, M.; Knowles, S.; Webb, L.] AWE, Reading RG7 4PR, Berks, England. [Akinci, A.] Los Alamos Natl Lab, Los Alamos, NM USA. RP Cheeseman, M (reprint author), AWE, Reading RG7 4PR, Berks, England. FU ACRR facility staff (SNL); Dorothy Meister (SNL); Dante Berry (SNL); Matthew Maisey (AWE); James Pottage (AWE) FX The authors gratefully acknowledge the help and support of the ACRR facility staff (SNL) for reactor operations, Dorothy Meister (SNL) for experimental assistance, Dante Berry (SNL) for supply of fibre types 2 and 5 and for technical discussions, Matthew Maisey (AWE) for processing experimental data/ technical discussions and James Pottage (AWE) for technical discussions relating to neutron effects. NR 9 TC 0 Z9 0 U1 0 U2 1 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 978-0-8194-9270-8 J9 PROC SPIE PY 2012 VL 8530 AR 853018 DI 10.1117/12.977489 PG 17 WC Materials Science, Coatings & Films; Optics; Physics, Applied SC Materials Science; Optics; Physics GA BEN39 UT WOS:000317464800029 ER PT S AU Elhadj, S Guss, G Matthews, MJ Bass, I AF Elhadj, Selim Guss, Gabe Matthews, Manyalibo J. Bass, Isaac BE Exarhos, GJ Gruzdev, VE Menapace, JA Ristau, D Soileau, MJ TI Laser-induced gas plasma etching of fused silica under ambient conditions SO LASER-INDUCED DAMAGE IN OPTICAL MATERIALS: 2012 SE Proceedings of SPIE LA English DT Proceedings Paper CT 44th Annual Laser Damage Symposium on Laser-Induced Damage in Optical Materials CY SEP 23-26, 2012 CL Natl Inst Stand & Technol (NIST), Boulder, CO SP SPIE, Lawrence Livermore Natl Lab, Spica Technologies, Inc, ATFilms, Precis Photon, IDEX Opt&Photon, Arrow Thin Films, Veeco, Lab Laser Energet, Alpine Res Opt, Rocky Mt Instruments HO Natl Inst Stand & Technol (NIST) DE silica; gas plasma; laser; etching; heat; thermal; machining ID DAMAGE; RATES AB Laser machining of optics to mitigate surface defects has greatly enhanced the ability to process large optics such as those found in fusion-class lasers. Recently, the use of assist reactive gases has shown promise in enhancing manifold etching rates relative to ambient conditions for CW-laser exposures. However, these methods still require significant heating of the substrate that induce residual stress, redeposit coverage, material flow, and compromise the final surface finish and damage threshold. While very reactive fluorinated gases are capable to reduce treatment temperatures even further, they are also inherently toxic and not readily transferable to large processing facilities. In this report, we look at whether a short-lived gas plasma could provide the safe and effective etchant sought, while still reducing the thermal load on the surface. We test this approach using a YAG laser-induced gas plasma to act as a source of the etchant for fused silica, a common optical material. The configuration and orientation of the beam and optical apparatus with respect to the surface was critical in preventing surface damage while etching the surface. Results with N-2 and air gas plasmas are shown, along with a description of the various experimental implementations attempted. C1 [Elhadj, Selim; Guss, Gabe; Matthews, Manyalibo J.; Bass, Isaac] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Elhadj, S (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM elhadj2@llnl.gov NR 18 TC 0 Z9 0 U1 0 U2 7 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 978-0-8194-9270-8 J9 PROC SPIE PY 2012 VL 8530 AR 853022 DI 10.1117/12.979814 PG 12 WC Materials Science, Coatings & Films; Optics; Physics, Applied SC Materials Science; Optics; Physics GA BEN39 UT WOS:000317464800046 ER PT S AU Matthews, MJ Shen, N Elhadj, S Miller, PE Nelson, AJ Laurence, TA Hamilton, J AF Matthews, Manyalibo J. Shen, Nan Elhadj, Selim Miller, Philip E. Nelson, A. J. Laurence, Ted A. Hamilton, Julie BE Exarhos, GJ Gruzdev, VE Menapace, JA Ristau, D Soileau, MJ TI Correlation of UV damage threshold with post-annealing in CVD-grown SiO2 overlayers on etched fused silica substrates SO LASER-INDUCED DAMAGE IN OPTICAL MATERIALS: 2012 SE Proceedings of SPIE LA English DT Proceedings Paper CT 44th Annual Laser Damage Symposium on Laser-Induced Damage in Optical Materials CY SEP 23-26, 2012 CL Natl Inst Stand & Technol (NIST), Boulder, CO SP SPIE, Lawrence Livermore Natl Lab, Spica Technologies, Inc, ATFilms, Precis Photon, IDEX Opt&Photon, Arrow Thin Films, Veeco, Lab Laser Energet, Alpine Res Opt, Rocky Mt Instruments HO Natl Inst Stand & Technol (NIST) ID SURFACES; SPECTROSCOPY; ABSORPTION; MICROSCOPY; FILMS AB Chemical vapor deposition (CVD) has been used for the production of fused silica optics in high power laser applications. However, relatively little is known about the ultraviolet (UV) laser damage threshold of CVD films and how they relate to intrinsic defects produced during deposition. We present a study relating structural and electronic defects in CVD films to the 355 nm pulsed laser damage threshold as a function of post-deposition annealing temperature (T-HT). Plasma-enhanced CVD, based on SiH4/N2O under oxygen-rich conditions, was used to deposit 1.5, 3.1 and 6.4 mu m thick films on etched SiO2 substrates. Rapid annealing was performed using a scanned CO2 laser beam up to T-HT similar to 2100 K. The films were then characterized using X-ray photoemission spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR), and photoluminescence (PL). A gradual transition in the damage threshold of annealed films was observed at T-HT up to 1600 K, correlating with a decrease in NB silanol and broadband PL emission. An additional sharp transition in damage threshold also occurs at similar to 1850 K indicating substrate annealing. Based on our results, a mechanism for damage-related defect annealing is proposed, and the potential of using high-T-HT CVD SiO2 to mitigate optical damage is also discussed. C1 [Matthews, Manyalibo J.; Shen, Nan; Elhadj, Selim; Miller, Philip E.; Nelson, A. J.; Laurence, Ted A.; Hamilton, Julie] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Matthews, MJ (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA. EM ibo@llnl.gov NR 25 TC 0 Z9 0 U1 1 U2 15 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 978-0-8194-9270-8 J9 PROC SPIE PY 2012 VL 8530 AR 85300B DI 10.1117/12.979210 PG 14 WC Materials Science, Coatings & Films; Optics; Physics, Applied SC Materials Science; Optics; Physics GA BEN39 UT WOS:000317464800008 ER PT S AU Stolz, CJ Runkel, J AF Stolz, Christopher J. Runkel, Jeff BE Exarhos, GJ Gruzdev, VE Menapace, JA Ristau, D Soileau, MJ TI Brewster Angle Polarizing Beamsplitter Laser Damage Competition: "P" polarization SO LASER-INDUCED DAMAGE IN OPTICAL MATERIALS: 2012 SE Proceedings of SPIE LA English DT Proceedings Paper CT 44th Annual Laser Damage Symposium on Laser-Induced Damage in Optical Materials CY SEP 23-26, 2012 CL Natl Inst Stand & Technol (NIST), Boulder, CO SP SPIE, Lawrence Livermore Natl Lab, Spica Technologies, Inc, ATFilms, Precis Photon, IDEX Opt&Photon, Arrow Thin Films, Veeco, Lab Laser Energet, Alpine Res Opt, Rocky Mt Instruments HO Natl Inst Stand & Technol (NIST) DE damage testing; polarizer; thin film; Brewster angle; multilayer; 1064 nm laser; nanosecond pulse length; ISO21254-2 AB Brewster angle plate polarizing beamsplitters play a critical role in splitting and combining beams within high power laser systems. A laser damage competition of polarizer beamsplitter coatings creates the opportunity to survey the current laser resistance these coatings within private industry, governmental institutions, and universities by a direct comparison of samples tested under identical conditions. The requirements of the coatings are a minimum transmission of 95% at "P" polarization and minimum reflection of 99% at "S" polarization at 1064 nm and 56.4 degrees angle of incidence. The choice of coating materials, design, and deposition method were left to the participant. Laser damage testing was performed according to the ISO 11254 standard utilizing a 1064 nm wavelength laser with a 10 ns pulse length operating at a repetition rate of 20 Hz. A double blind test assured sample and submitter anonymity so only a summary of the results are presented. In addition to the laser resistance results, details of cleaning methods, deposition processes, coating materials and layer count, and spectral results are also shared. Because of the large number of samples that were submitted, damage testing was conducted at "P" polarization only with "S" polarization damage testing reserved for next year on these submitted samples. Also the samples were only tested in the forward propagating direction; specifically samples were irradiated from air as the incident medium, through the thin film, and then through the substrate. In summary, a 6: 1 difference existed for "P" polarization damage fluences amongst all of the competitors with the dominate variables that impacted the laser resistance being the deposition materials, deposition process, and cleaning method. C1 [Stolz, Christopher J.] Lawrence Livermore Natl Lab, 7000 East Ave,L-491, Livermore, CA 94550 USA. [Runkel, Jeff] Quantel USA, Bozeman, MT 59715 USA. RP Stolz, CJ (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave,L-491, Livermore, CA 94550 USA. FU U.S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344] FX This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. NR 11 TC 1 Z9 1 U1 2 U2 7 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 978-0-8194-9270-8 J9 PROC SPIE PY 2012 VL 8530 AR 85300M DI 10.1117/12.981735 PG 7 WC Materials Science, Coatings & Films; Optics; Physics, Applied SC Materials Science; Optics; Physics GA BEN39 UT WOS:000317464800013 ER PT J AU Kapadia, R Fan, ZY Takei, K Javey, A AF Kapadia, Rehan Fan, Zhiyong Takei, Kuniharu Javey, Ali TI Nanopillar photovoltaics: Materials, processes, and devices SO NANO ENERGY LA English DT Review DE Nanowires; Solar cells; Three-dimensional; Photo management; Nanotextured ID SURFACE RECOMBINATION VELOCITY; SOLAR-CELLS; SEMICONDUCTOR NANOWIRES; SILICON NANOWIRE; OPTICAL-ABSORPTION; ARRAYS; SINGLE; SI; GROWTH AB Nanopillar photovoltaics present significant potential for fabrication of high-efficiency, low-cost solar cells. The advantages over planar cells, including wider materials choice, device geometries, and enhanced optical and electronic properties have been studied in detail over the past decade. Specifically, the 3-D geometry enables optimization of carrier collection and reduction of the material quality constraints. Furthermore, the anti-reflective and light trapping properties enable a drastic reduction in material necessary to absorb the majority of the incident light. Together, the optical and electronic advantages allow solar cell fabrication on low-cost substrates. However, the choice of the material system is important for taking advantage of the unique properties of nanopillar cells, especially given large surface/interface area. This review focuses on the recent work on the optical and electronic properties of nanopillar photovoltaics and the fabrication processes utilizing low-cost substrates. (C) 2011 Elsevier Ltd. All rights reserved. C1 [Kapadia, Rehan; Fan, Zhiyong; Takei, Kuniharu; Javey, Ali] Univ Calif Berkeley, Berkeley, CA 94720 USA. [Kapadia, Rehan; Fan, Zhiyong; Takei, Kuniharu; Javey, Ali] Univ Calif Berkeley, Berkeley Sensor & Actuator Ctr, Berkeley, CA 94720 USA. [Kapadia, Rehan; Fan, Zhiyong; Takei, Kuniharu; Javey, Ali] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Javey, A (reprint author), Univ Calif Berkeley, Berkeley, CA 94720 USA. EM ajavey@eecs.berkeley.edu RI Fan, Zhiyong/C-4970-2012; OI Fan, Zhiyong/0000-0002-5397-0129 NR 42 TC 51 Z9 51 U1 3 U2 83 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 2211-2855 J9 NANO ENERGY JI Nano Energy PD JAN PY 2012 VL 1 IS 1 BP 132 EP 144 DI 10.1016/j.nanoen.2011.11.002 PG 13 WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA 132EF UT WOS:000318050000012 ER PT J AU Ji, LW Zheng, HH Ismach, A Tan, ZK Xun, SD Lin, E Battaglia, V Srinivasan, V Zhang, YG AF Ji, Liwen Zheng, Honghe Ismach, Ariel Tan, Zhongkui Xun, Shidi Lin, Eric Battaglia, Vincent Srinivasan, Venkat Zhang, Yuegang TI Graphene/Si multilayer structure anodes for advanced half and full lithium-ion cells SO NANO ENERGY LA English DT Article DE Graphene/Si multilayer structures; Lithium-ion half cells and full cells ID RECHARGEABLE BATTERIES; REVERSIBLE CAPACITY; NEGATIVE ELECTRODES; SI FILM; SILICON; PERFORMANCE; COMPOSITE; GRAPHITE; STORAGE AB Graphene/Si multilayer structures were constructed through a repeated process of filtering liquid-phase exfoliated graphene film and the subsequent coating of amorphous Si film via plasma-enhanced chemical vapor deposition (PECVD) method. The multilayer heterogeneous structure films, directly fabricated on copper current collectors, were used as anodes for rechargeable lithium half-cells and full-cells without adding any polymer binder or conductive additives. The half cells based on the new anodes could easily achieve a capacity almost four times higher than the theoretical value of graphite even after 30 cycles' charging/discharging. It also demonstrated improved capacity retention compared to those of pure Si film-based anodes. Furthermore, full cells composed of the graphene/Si multilayer structure anodes and commercially available LiNi1/3Mn1/3Co1/3O2 cathodes were also assembled. Initial results showed good electrochemical performance comparable to that of commercially available rechargeable LIBs. Our prepared multilayer structures, taking advantage of the long cycle life of carbon and the high lithium-storage capacity of Si, provided a promising research platform that may eventually lead to an optimized anode structure for advanced rechargeable LIBs. (C) 2011 Published by Elsevier Ltd. C1 [Ji, Liwen; Ismach, Ariel; Tan, Zhongkui; Lin, Eric; Zhang, Yuegang] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Mol Foundry, Berkeley, CA 94720 USA. [Zheng, Honghe; Xun, Shidi; Battaglia, Vincent; Srinivasan, Venkat] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Energy Technol Dept, Berkeley, CA 94720 USA. RP Zhang, YG (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Mol Foundry, Berkeley, CA 94720 USA. EM yzhang5@lbl.gov RI Zhang, Y/E-6600-2011; ismach, ariel/A-9913-2015 OI Zhang, Y/0000-0003-0344-8399; ismach, ariel/0000-0002-4328-9591 FU Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231] FX This work was supported by the Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract no. DE-AC02-05CH11231. NR 31 TC 75 Z9 75 U1 27 U2 247 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 2211-2855 EI 2211-3282 J9 NANO ENERGY JI Nano Energy PD JAN PY 2012 VL 1 IS 1 BP 164 EP 171 DI 10.1016/j.nanoen.2011.08.003 PG 8 WC Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied SC Chemistry; Science & Technology - Other Topics; Materials Science; Physics GA 132EF UT WOS:000318050000016 ER PT S AU Elwasif, WR Bernholdt, DE Pannala, S Allu, S Foley, SS AF Elwasif, Wael R. Bernholdt, David E. Pannala, Sreekanth Allu, Srikanth Foley, Samantha S. GP IEEE TI Parameter Sweep and Optimization of Loosely Coupled Simulations Using the DAKOTA Toolkit SO 15TH IEEE INTERNATIONAL CONFERENCE ON COMPUTATIONAL SCIENCE AND ENGINEERING (CSE 2012) / 10TH IEEE/IFIP INTERNATIONAL CONFERENCE ON EMBEDDED AND UBIQUITOUS COMPUTING (EUC 2012) SE IEEE International Conference on Computational Science and Engineering LA English DT Proceedings Paper CT 15th IEEE International Conference on Computational Science and Engineering (CSE) / 10th IEEE/IFIP International Conference on Embedded and Ubiquitous Computing (EUC) CY DEC 05-07, 2012 CL Paphos, CYPRUS SP IEEE, IFIP, IEEE Comp Soc, Univ Cyprus, IEEE Comp Soc Tech Comm Scalable Comp (TCSC) DE Framework; Optimization; Parameter Sweep; Coupled Simulations; Battery Design ID ION CELLS AB The increasing availability of large scale computing capabilities has accelerated the development of high-fidelity coupled simulations. Such simulations typically involve the integration of models that implement various aspects of the complex phenomena under investigation. Coupled simulations are playing an integral role in fields such as climate modeling, earth systems modeling, rocket simulations, computational chemistry, fusion research, and many other computational fields. Model coupling provides scientists with systematic ways to virtually explore the physical, mathematical, and computational aspects of the problem. Such exploration is rarely done using a single execution of a simulation, but rather by aggregating the results from many simulation runs that, together, serve to bring to light novel knowledge about the system under investigation. Furthermore, it is often the case (particularly in engineering disciplines) that the study of the underlying system takes the form of an optimization regime, where the control parameter space is explored to optimize an objective functions that captures system realizability, cost, performance, or a combination thereof. Novel and flexible frameworks that facilitate the integration of the disparate models into a holistic simulation are used to perform this research, while making efficient use of the available computational resources. In this paper, we describe the integration of the DAKOTA optimization and parameter sweep toolkit with the Integrated Plasma Simulator (IPS), a component-based framework for loosely coupled simulations. The integration allows DAKOTA to exploit the internal task and resource management of the IPS to dynamically instantiate simulation instances within a single IPS instance, allowing for greater control over the trade-off between efficiency of resource utilization and time to completion. We present a case study showing the use of the combined DAKOTA-IPS system to aid in the design of a lithium ion battery (LIB) cell, by studying a coupled system involving the electrochemistry and ion transport at the lower length scales and thermal energy transport at the device scales. The DAKOTA-IPS system provides a flexible tool for use in optimization and parameter sweep studies involving loosely coupled simulations that is suitable for use in situations where changes to the constituent components in the coupled simulation are impractical due to intellectual property or code heritage issues. C1 [Elwasif, Wael R.; Bernholdt, David E.; Pannala, Sreekanth; Allu, Srikanth; Foley, Samantha S.] Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN USA. RP Elwasif, WR (reprint author), Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN USA. EM elwasifwr@ornl.gov; bernholdtde@ornl.gov; pannalas@ornl.gov; allus@ornl.gov; foleyss@ornl.gov RI allu, srikanth/F-3391-2013; Pannala, Sreekanth/F-9507-2010; OI allu, srikanth/0000-0003-2841-4398 NR 18 TC 4 Z9 4 U1 0 U2 16 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1949-0828 BN 978-1-4673-5165-2 J9 IEEE INT C COMPUT PY 2012 BP 102 EP 110 DI 10.1109/ICCSE.2012.24 PG 9 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEN50 UT WOS:000317475000015 ER PT S AU Li, SR Huang, DP Chen, JH AF Li, Shaorui Huang, Deping Chen, Jinghong GP IEEE TI A PVT-Robust Current-Mode Passive Mixer with Source-Degenerated Transconductance Amplifier SO 2012 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS 2012) SE IEEE International Symposium on Circuits and Systems LA English DT Proceedings Paper CT IEEE International Symposium on Circuits and Systems CY MAY 20-23, 2012 CL Seoul, SOUTH KOREA SP IEEE, Circuits and Syst Soc (CAS) ID CMOS; RECEIVER AB A current-mode passive mixer with conversion gain that is robust to process, supply voltage, and temperature (PVT) variations is presented. The passive mixer includes a transconductance amplifier having a source degeneration capacitor. The conversion gain of the current-mode passive mixer is proportional to the ratio of the source degeneration capacitance C-S to the load capacitance C-L. This technique eliminates the need for extra PVT compensation circuitry. Moreover, the conversion gain of the mixer can be designed to be programmable without relying on any gain detecting circuitry. A test chip fabricated in a 90-nm CMOS process demonstrates the PVT-robustness of the proposed mixer. C1 [Li, Shaorui] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Li, SR (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0271-4302 BN 978-1-4673-0219-7 J9 IEEE INT SYMP CIRC S PY 2012 BP 2381 EP 2384 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BEJ43 UT WOS:000316903702146 ER PT S AU Dufour, YS Donohue, TJ AF Dufour, Yann S. Donohue, Timothy J. BE Poole, RK TI Signal Correlations in Ecological Niches Can Shape the Organization and Evolution of Bacterial Gene Regulatory Networks SO ADVANCES IN BACTERIAL RESPIRATORY PHYSIOLOGY SE Advances in Microbial Physiology LA English DT Review; Book Chapter ID MULTIPLE SEQUENCE ALIGNMENT; FACTOR-BINDING SITES; ANTI-SIGMA FACTORS; ESCHERICHIA-COLI; TRANSCRIPTION FACTOR; RHODOBACTER-SPHAEROIDES; ENVIRONMENTAL-CHANGES; COMPARATIVE GENOMICS; ADAPTIVE PREDICTION; PROKARYOTIC GENOMES AB Transcriptional regulation plays a significant role in the biological response of bacteria to changing environmental conditions. Therefore, mapping transcriptional regulatory networks is an important step not only in understanding how bacteria sense and interpret their environment but also to identify the functions involved in biological responses to specific conditions. Recent experimental and computational developments have facilitated the characterization of regulatory networks on a genome-wide scale in model organisms. In addition, the multiplication of complete genome sequences has encouraged comparative analyses to detect conserved regulatory elements and infer regulatory networks in other less well-studied organisms. However, transcription regulation appears to evolve rapidly, thus, creating challenges for the transfer of knowledge to nonmodel organisms. Nevertheless, the mechanisms and constraints driving the evolution of regulatory networks have been the subjects of numerous analyses, and several models have been proposed. Overall, the contributions of mutations, recombination, and horizontal gene transfer are complex. Finally, the rapid evolution of regulatory networks plays a significant role in the remarkable capacity of bacteria to adapt to new or changing environments. Conversely, the characteristics of environmental niches determine the selective pressures and can shape the structure of regulatory network accordingly. C1 [Dufour, Yann S.] Yale Univ, Dept Mol Cellular & Dev Biol, New Haven, CT USA. [Donohue, Timothy J.] Univ Wisconsin, Dept Bacteriol, Madison, WI 53706 USA. [Donohue, Timothy J.] Univ Wisconsin, Great Lakes Bioenergy Res Ctr, Madison, WI USA. RP Donohue, TJ (reprint author), Univ Wisconsin, Dept Bacteriol, Madison, WI 53706 USA. EM tdonohue@bact.wisc.edu OI Donohue, Timothy/0000-0001-8738-2467; Dufour, Yann/0000-0003-0244-0192 FU NIGMS NIH HHS [R01 GM075273, GM075273] NR 112 TC 2 Z9 2 U1 2 U2 15 PU ACADEMIC PRESS LTD-ELSEVIER SCIENCE LTD PI LONDON PA 24-28 OVAL ROAD, LONDON NW1 7DX, ENGLAND SN 0065-2911 BN 978-0-12-394423-8 J9 ADV MICROB PHYSIOL JI Adv.Microb.Physiol. PY 2012 VL 61 BP 1 EP 36 DI 10.1016/B978-0-12-394423-8.00001-9 PG 36 WC Biochemistry & Molecular Biology; Microbiology SC Biochemistry & Molecular Biology; Microbiology GA BEL63 UT WOS:000317240600002 PM 23046950 ER PT J AU Bardi, M Payri, R Malbec, LM Bruneaux, G Pickett, LM Manin, J Bazyn, T Genzale, C AF Bardi, Michele Payri, Raul Malbec, Louis Marie Bruneaux, Gilles Pickett, Lyle M. Manin, Julien Bazyn, Tim Genzale, Caroline TI ENGINE COMBUSTION NETWORK: COMPARISON OF SPRAY DEVELOPMENT, VAPORIZATION, AND COMBUSTION IN DIFFERENT COMBUSTION VESSELS SO ATOMIZATION AND SPRAYS LA English DT Article DE Diesel; sprays; combustion; combustion vessels; experimental methodologies; liquid length; vapor penetration; ignition delay; lift-off length ID DIESEL SPRAYS; EVAPORATIVE CONDITIONS; NOZZLE GEOMETRY; PENETRATION; LIQUID AB Development and mixing of Diesel sprays are long known to be key factors for combustion and pollutant emissions but the related measurements in a real engine is not an easy task. This fact led researchers to simulate engine conditions in special facilities that allow the use of high-fidelity diagnostics. The Engine Combustion Network (ECN) has focused on overcoming the variability from one institution to the next by testing nominally identical Diesel injectors in four different facilities for the first time, including constant-pressure flow and constant-volume preburn chambers. Liquid- and vapor-phase penetration, ignition delay, and lift-off length measurements are compared with similar experimental setups and processing methodologies. The consistency of the data obtained indicates a good level of repeatability between the test rigs employed, and no deviation of the results can be associated with the facility type. Comparison of liquid length measurements via Mie scattering shows that this diagnostic is sensitive to the orientation of the light source. For more repeatable results between facilities, diffused back-illumination imaging is recommended. A novel image processing method has been employed to detect spray boundaries obtained in high-speed schlieren imaging: the method showed high accuracy and robustness to the different schlieren setups employed by the institutions. High-speed broadband chemiluminescence, as schlieren imaging, shows the onset of cool flame, and moreover when the combustion is stabilized, it provides an important reference to define ignition delay and lift-off length. The methodology put in place by the ECN participants in this work allows an important step forward in two directions. The first is to understand the repeatability related to experimental data in high-pressure, high-temperature environments. The second is to advance the understanding of the different diagnostics applied, thereby providing more quantitative measurements that yield to a more suitable datasets for computational fluid-dynamic model evaluation. C1 [Bardi, Michele; Payri, Raul] Univ Politecn Valencia, CMT Motores Term, Valencia 46022, Spain. [Malbec, Louis Marie; Bruneaux, Gilles] IFP Energies Nouvelles, F-92852 Rueil Malmaison, France. [Pickett, Lyle M.; Manin, Julien] Sandia Natl Labs, Livermore, CA 94550 USA. [Bazyn, Tim] Caterpillar Inc, Mossville, IL 61552 USA. [Genzale, Caroline] Georgia Inst Technol, Atlanta, GA 30332 USA. RP Bardi, M (reprint author), Univ Politecn Valencia, CMT Motores Term, Valencia 46022, Spain. EM mbardi@mot.upv.es RI Payri, Raul/B-3662-2009; Moteur, Direction TAE/C-1458-2013; IFPEN, Publications/A-8028-2008 OI Payri, Raul/0000-0001-7428-5510; NR 38 TC 38 Z9 38 U1 2 U2 26 PU BEGELL HOUSE INC PI REDDING PA 50 CROSS HIGHWAY, REDDING, CT 06896 USA SN 1044-5110 J9 ATOMIZATION SPRAY JI Atom. Sprays PY 2012 VL 22 IS 10 BP 807 EP 842 PG 36 WC Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA 125IL UT WOS:000317533400001 ER PT B AU Rao, NSV Narahari, Y Madhavan, CEV Yau, DKY Ma, CYT AF Rao, Nageswara S. V. Narahari, Y. Madhavan, C. E. Veni Yau, David K. Y. Ma, Chris Y. T. BA Das, SK Kant, K Zhang, N BF Das, SK Kant, K Zhang, N TI An Analytical Framework for Cyber-Physical Networks SO HANDBOOK ON SECURING CYBER-PHYSICAL CRITICAL INFRASTRUCTURE: FOUNDATIONS AND CHALLENGES LA English DT Article; Book Chapter ID DISTRIBUTED SENSOR NETWORKS; COMPUTATIONAL-COMPLEXITY ISSUES; CONVECTION-DIFFUSION; RADIOACTIVE SOURCES; FUSION METHODS; DISPERSION; SURVEILLANCE; EQUATIONS; COVERAGE; SYSTEMS C1 [Rao, Nageswara S. V.] Oak Ridge Natl Lab, Div Sci & Math, Oak Ridge, TN USA. [Narahari, Y.; Madhavan, C. E. Veni] Indian Inst Sci, Dept Comp Sci & Automat, Bangalore, Karnataka, India. [Yau, David K. Y.] Purdue Univ, Dept Comp Sci, W Lafayette, IN 47907 USA. [Ma, Chris Y. T.] Illinois Singapore Pte Ltd, Adv Digital Sci Ctr, Singapore, Singapore. RP Rao, NSV (reprint author), Oak Ridge Natl Lab, Div Sci & Math, Oak Ridge, TN USA. EM raons@ornl.gov; hari@csa.iisc.ernet.in; cevm@csa.iisc.ernet.in; yau@cs.purdue.edu; chris.ma@adsc.com.sg OI Rao, Nageswara/0000-0002-3408-5941 NR 85 TC 1 Z9 1 U1 0 U2 3 PU MORGAN KAUFMANN PUB INC PI SAN FRANCISCO PA 340 PINE STR, 6TH FLR, SAN FRANCISCO, CA 94104-3205 USA BN 978-0-12-415910-5; 978-0-12-415815-3 PY 2012 BP 55 EP 72 DI 10.1016/B978-0-12-415815-3.00003-0 PG 18 WC Computer Science, Information Systems SC Computer Science GA BEK50 UT WOS:000317077000006 ER PT B AU Kant, K Deccio, C AF Kant, Krishna Deccio, Casey BA Das, SK Kant, K Zhang, N BF Das, SK Kant, K Zhang, N TI Security and Robustness in the Internet Infrastructure SO HANDBOOK ON SECURING CYBER-PHYSICAL CRITICAL INFRASTRUCTURE: FOUNDATIONS AND CHALLENGES LA English DT Article; Book Chapter ID ROUTING CONVERGENCE; BGP CONVERGENCE; DELAY C1 [Kant, Krishna] George Mason Univ, Fairfax, VA 22030 USA. [Deccio, Casey] Sandia Natl Labs, Livermore, CA 94550 USA. RP Kant, K (reprint author), George Mason Univ, Fairfax, VA 22030 USA. EM krishna.kant@intel.com; ctdecci@sandia.gov NR 61 TC 0 Z9 0 U1 0 U2 0 PU MORGAN KAUFMANN PUB INC PI SAN FRANCISCO PA 340 PINE STR, 6TH FLR, SAN FRANCISCO, CA 94104-3205 USA BN 978-0-12-415910-5; 978-0-12-415815-3 PY 2012 BP 705 EP 733 DI 10.1016/B978-0-12-415815-3.00028-5 PG 29 WC Computer Science, Information Systems SC Computer Science GA BEK50 UT WOS:000317077000029 ER PT S AU de Tudela, RP Lopez-Duran, D de Lara-Castells, MP Prosmiti, R Roncero, O Delgado-Barrio, G Gianturco, FA Jellinek, J Villarreal, P AF Perez de Tudela, R. Lopez-Duran, D. de Lara-Castells, M. P. Prosmiti, R. Roncero, O. Delgado-Barrio, G. Gianturco, F. A. Jellinek, J. Villarreal, P. BE Simos, TE Maroulis, G TI A Quantum Chemistry Approach to Energies, Structures, and Spectroscopy of Doped Helium Clusters SO INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2009 (ICCMSE 2009) SE AIP Conference Proceedings LA English DT Proceedings Paper CT 7th International Conference on Computational Methods in Science and Engineering (ICCMSE) CY SEP 29-OCT 04, 2009 CL Rhodes, GREECE SP European Soc Computat Methods Sci, Engn & Technol DE electronic structure calculations; potential energy surface; weakly bounded clusters; He-nanodroplets; microscopic superfluidity ID RESOLUTION INFRARED-SPECTRA; MONTE-CARLO SIMULATIONS; AB-INITIO CALCULATIONS; PARA-HYDROGEN CLUSTERS; VIBRATIONAL PREDISSOCIATION; CARBON-MONOXIDE; HE-3 CLUSTERS; DYNAMICS; MOLECULES; DROPLETS AB Diffusion and path integral Monte Carlo methods are currently, and successfully, used to describe structures and binding energies of helium clusters doped with some impurity. For diatomic dopants, by considering the He atoms as "electrons" and the dopant as "nuclei" within a Hartree/Hartree-Fock framework, our group has developed a complementary tool which, in addition to the above mentioned properties, provides us with wave-functions. It allows to perform spectral simulations that can be compared with the experiment. This paper reviews the fundamental aspects of such quantum-chemistry-like methodology in which, together with masses, Coulomb interactions are replaced by proper molecular ones. Extensions towards more accurate ab initio methodologies are outlined. Finally, the challenging scenario arising when the impurity is not immersed but attached to the nanodroplet, giving rise to an unusual "solar" system in which the planets no longer move around the dopant as a "sun", is addressed. C1 [Perez de Tudela, R.; Lopez-Duran, D.; de Lara-Castells, M. P.; Prosmiti, R.; Roncero, O.; Delgado-Barrio, G.; Villarreal, P.] Inst Fis Fundamental CSIC, Serrano 123, Madrid 28006, Spain. [Gianturco, F. A.] Univ Rome, Dept Chem & INFM, I-00185 Rome, Italy. [Jellinek, J.] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA. RP Villarreal, P (reprint author), Inst Fis Fundamental CSIC, Serrano 123, Madrid 28006, Spain. EM p.villarreal@imaff.cfmac.csic.es RI de Lara-Castells, Maria Pilar/C-5846-2014; Roncero, Octavio/K-1872-2014; Villarreal, Pablo/K-2397-2014; Perez de Tudela, Ricardo/A-4939-2015 OI de Lara-Castells, Maria Pilar/0000-0001-8697-5770; Roncero, Octavio/0000-0002-8871-4846; Perez de Tudela, Ricardo/0000-0002-0314-6983 FU MICINN (Spain) [FIS2007-62006, CTQ200762898]; CSIC-CAM ( Spain) [CCG08-CSIC/ESP-3680]; U.S. Department of Energy [DE-AC-02-06CH11357] FX This work has been partially supported by the MICINN (Spain) under projects FIS2007-62006 and CTQ200762898, and by CSIC-CAM ( Spain) under grant CCG08-CSIC/ESP-3680. J. J. was supported by the Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences, U.S. Department of Energy under Contract number DE-AC-02-06CH11357. The calculations presented here were performed at Centro de Calculo (IFF), CTI(CSIC), and CESGA (the SuperComputer Center of Galicia). NR 78 TC 0 Z9 0 U1 1 U2 10 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1122-7 J9 AIP CONF PROC PY 2012 VL 1504 BP 240 EP 253 DI 10.1063/1.4771719 PG 14 WC Computer Science, Interdisciplinary Applications; Physics, Applied SC Computer Science; Physics GA BEK61 UT WOS:000317113600021 ER PT J AU Zavalov, O Bocharova, V Halamek, J Halamkova, L Korkmaz, S Arugula, MA Chinnapareddy, S Katz, E Privman, V AF Zavalov, Oleksandr Bocharova, Vera Halamek, Jan Halamkova, Lenka Korkmaz, Sevim Arugula, Mary A. Chinnapareddy, Soujanya Katz, Evgeny Privman, Vladimir TI Two-Input Enzymatic Logic Gates Made Sigmoid by Modifications of the Biocatalytic Reaction Cascades SO INTERNATIONAL JOURNAL OF UNCONVENTIONAL COMPUTING LA English DT Article DE Biocomputing; enzyme logic; logic gate; binary logic; sigmoid response ID BIOMEDICAL APPLICATIONS; DIGITAL BIOSENSORS; BIOCHEMICAL LOGIC; NOISE-REDUCTION; MOLECULAR LOGIC; FILTER RESPONSE; LIVER ESTERASE; OUTPUT SIGNALS; ENZYMES; NETWORK AB Computing based on biochemical processes is a newest rapidly developing field of unconventional information and signal processing. In this paper we present results of our research in the field of biochemical computing and summarize the obtained numerical and experimental data for implementations of the standard two-input OR and AND gates with double-sigmoid shape of the output signal. This form of response was obtained as a function of the two inputs in each of the realized biochemical systems. The enzymatic gate processes in the first system were activated with two chemical inputs and resulted in optically detected chromogen oxidation, which happens when either one or both of the inputs are present. In this case, the biochemical system is functioning as the OR gate. We demonstrate that the addition of a "filtering" biocatalytic process leads to a considerable reduction of the noise transmission factor and the resulting gate response has sigmoid shape in both inputs. The second system was developed for functioning as an AND gate, where the output signal was activated only by a simultaneous action of two enzymatic biomarkers. This response can be used as an indicator of liver damage, but only if both of these of the inputs are present at their elevated, pathophysiological values of concentrations. A kinetic numerical model was developed and used to estimate the range of parameters for which the experimentally realized logic gate is close to optimal. We also analyzed the system to evaluate its noise-handling properties. C1 [Zavalov, Oleksandr; Privman, Vladimir] Clarkson Univ, Dept Phys, Potsdam, NY 13699 USA. [Bocharova, Vera] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN USA. [Halamek, Jan; Halamkova, Lenka; Chinnapareddy, Soujanya; Katz, Evgeny] Clarkson Univ, Dept Chem & Biomol Sci, Potsdam, NY 13699 USA. [Korkmaz, Sevim] Clarkson Univ, Dept Chem & Biomol Engn, Potsdam, NY 13699 USA. [Arugula, Mary A.] Univ Utah, Dept Chem, Salt Lake City, UT 84112 USA. RP Zavalov, O (reprint author), Clarkson Univ, Dept Phys, Potsdam, NY 13699 USA. FU U. S. National Science Foundation [CCF-1015983, CBET-1066397]; Laboratory Directed Research and Development Program of Oak Ridge National Laboratory FX The authors gratefully acknowledge funding of this research the U. S. National Science Foundation (via awards CCF-1015983 and CBET-1066397 at Clarkson University), and sponsorship by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory (managed by UT-Battelle, LLC, for the U. S. Department of Energy). NR 73 TC 9 Z9 9 U1 3 U2 6 PU OLD CITY PUBLISHING INC PI PHILADELPHIA PA 628 NORTH 2ND ST, PHILADELPHIA, PA 19123 USA SN 1548-7199 EI 1548-7202 J9 INT J UNCONV COMPUT JI Int. J. Unconv. Comput. PY 2012 VL 8 IS 5-6 SI SI BP 347 EP 365 PG 19 WC Computer Science, Theory & Methods SC Computer Science GA 125LH UT WOS:000317540800002 ER PT J AU Tam, TK AF Tam, Tsz Kin TI Switchable Biocatalytic Electrodes Controlled by Biomolecular Computing Systems SO INTERNATIONAL JOURNAL OF UNCONVENTIONAL COMPUTING LA English DT Article DE Biocomputing; logic gates; signal-responsive electrodes; biomarkers; enzymatic reactions ID LOGIC GATES; MOLECULAR LOGIC; ACTUATORS; NETWORK; SIGNALS; INJURY AB This review details the research advances in the integration of enzyme-based biocomputing systems operating as Boolean logic gates utilized for biomolecular information processing with signal-responsive electrodes. Biomolecular computing using enzyme-catalyzed reactions has been designed to allow logic processing different patterns of biochemical input signals and to generate a single output signal which can regulate the electrochemical activity of switchable electrodes, transducing the biochemical input signal into the electrical output signal. This approach has also led to switchable electrochemical interfaces logically controlled by concentration changes of biomarkers reflecting different physiological conditions. Various systems of switchable biocatalytic electrodes controlled by biochemicals according to built-in Boolean logic encoded in the enzymatic reactions are discussed. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Tam, TK (reprint author), Pacific NW Natl Lab, Mail Stop J4-02,POB 999, Richland, WA 99352 USA. EM tsz.tam@pnnl.gov FU NIH National Institute of General Medical Sciences [R01GM080987]; Transformational Materials Science Initiative of Pacific Northwest National Laboratory (PNNL); DOE by Battelle [DE-AC05-76RL01830] FX This work is partially supported by the NIH National Institute of General Medical Sciences (grant number R01GM080987) and the Transformational Materials Science Initiative of Pacific Northwest National Laboratory (PNNL). PNNL is a multiprogram national laboratory operated for DOE by Battelle under Contract DE-AC05-76RL01830. NR 31 TC 1 Z9 1 U1 1 U2 3 PU OLD CITY PUBLISHING INC PI PHILADELPHIA PA 628 NORTH 2ND ST, PHILADELPHIA, PA 19123 USA SN 1548-7199 EI 1548-7202 J9 INT J UNCONV COMPUT JI Int. J. Unconv. Comput. PY 2012 VL 8 IS 5-6 SI SI BP 367 EP 381 PG 15 WC Computer Science, Theory & Methods SC Computer Science GA 125LH UT WOS:000317540800003 ER PT J AU Strack, G Katz, E AF Strack, Guinevere Katz, Evgeny TI Information Security Systems Based on Biomolecular Information Processing SO INTERNATIONAL JOURNAL OF UNCONVENTIONAL COMPUTING LA English DT Article DE Keypad lock; Logic gate; Enzyme; Antibody; Molecular logic; Information security; Biofuel cell; Barcode; Biocatalytic electrode ID REGULATED BIOELECTRONIC DEVICES; LOGIC GATES; BIOFUEL CELLS; BOOLEAN LOGIC; KEYPAD LOCK; BARCODES; SIGNALS; ENZYMES; RECOGNITION; INTERFACE AB Digital information processing paradigms have inspired the design of chemical and biochemical systems operating with computational functionalities. Biomolecule-based unconventional computing has been applied to information security systems and demonstrated with DNA, but as emphasized herein, with biocatalysts and antibodies as well. Using conventional digital circuitry as inspiration, a keypad lock design was configured using biocatalytic cascades and antibody bio-recognition sequences. The biomolecular keypad locks were interfaced with switchable electrodes and incorporated into a model biofuel cell to demonstrate logically controlled power output. In addition, a robust bioelectronic interface served as a key that unlocks strings of digital code; the generated code-based on the control of the oxygen reduction reaction-produced a directly readable barcode. C1 [Strack, Guinevere] USAF, Res Lab, Airbase Sci Div, Tyndall AFB, FL 32403 USA. [Strack, Guinevere] Oak Ridge Inst Sci & Educ, Belcamp, MD 21017 USA. [Katz, Evgeny] Clarkson Univ, Dept Chem & Biomol Sci, Potsdam, NY 13699 USA. RP Strack, G (reprint author), USAF, Res Lab, Airbase Sci Div, Tyndall AFB, FL 32403 USA. EM guinevere.strack.ctr@Tyndall.af.mil; ekatz@clarkson.edu FU U.S. Air Force Research Laboratory FX G. Strack was supported by an appointment to the Postgraduate Research Participation Program at the U.S. Air Force Research Laboratory administered by the Oak Ridge Institute for Science and Education through an interagency agreement between the U.S. Department of Energy and USAFRL. NR 54 TC 0 Z9 0 U1 3 U2 17 PU OLD CITY PUBLISHING INC PI PHILADELPHIA PA 628 NORTH 2ND ST, PHILADELPHIA, PA 19123 USA SN 1548-7199 J9 INT J UNCONV COMPUT JI Int. J. Unconv. Comput. PY 2012 VL 8 IS 5-6 SI SI BP 419 EP 432 PG 14 WC Computer Science, Theory & Methods SC Computer Science GA 125LH UT WOS:000317540800006 ER PT J AU Dhere, NG Wohlgemuth, JH Lynn, K AF Dhere, Neelkanth G. Wohlgemuth, John H. Lynn, Kevin TI Special Section on Reliability of Photovoltaic Cells, Modules, Components, and Systems SO JOURNAL OF PHOTONICS FOR ENERGY LA English DT Editorial Material C1 [Dhere, Neelkanth G.] Univ Cent Florida, Florida Solar Energy Ctr, Cocoa, FL 32922 USA. [Wohlgemuth, John H.] Natl Renewable Energy Lab, Golden, CO 80401 USA. [Lynn, Kevin] US DOE, Washington, DC 20585 USA. RP Dhere, NG (reprint author), Univ Cent Florida, Florida Solar Energy Ctr, 1679 Clearlake Rd, Cocoa, FL 32922 USA. EM dhere@fsec.ucf.edu; john.wohlgemuth@nrel.gov; kevin.lynn@ee.doe.gov NR 0 TC 0 Z9 0 U1 0 U2 2 PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 1947-7988 J9 J PHOTON ENERGY JI J. Photonics Energy PY 2012 VL 2 SI 3 AR 022099 DI 10.1117/1.JPE.2.022099 PG 1 WC Materials Science, Multidisciplinary; Optics; Physics, Applied SC Materials Science; Optics; Physics GA 128AR UT WOS:000317740900004 ER PT S AU Perkins, MP Ong, MM Robbins, CL AF Perkins, Michael P. Ong, Mike M. Robbins, Christopher L. GP IEEE TI A Low-Frequency Model for E-Field and B-Field Coupling into a Folded Antenna with Two Gaps SO 2012 IEEE INTERNATIONAL SYMPOSIUM ON ELECTROMAGNETIC COMPATIBILITY (EMC) SE IEEE International Symposium on Electromagnetic Compatibility LA English DT Proceedings Paper CT IEEE International Symposium on Electromagnetic Compatibility (EMC) CY AUG 05-10, 2012 CL Pittsburgh, PA SP IEEE, Electromagnet Compatibil Soc, China Electrotechn Soc, Evaluat Engn (EE), ENR, Microwave Digest, Microwave Journal, RF Globalnet, SAFETY & EMC Magazine, In Compliance Magazine, ITEM Media, ETS LINDGREN, Keystone Compliance, Retlif Testing Labs, Andro Computat Solutions, LLC, MIDCOM, Wurth Elekt, Gauss Instruments GmbH ID LOOP ANTENNA; SENSOR AB Electric field coupling into electrically small monopoles/dipoles and magnetic field coupling into electrically small loop antennas has been investigated extensively due to their applicability to a wide range of applications. However, under certain conditions electrically small folded antenna structures exist in which both coupling mechanisms must be included simultaneously in order to perform an accurate system analysis. In this paper we present a low frequency model that includes both electric and magnetic field coupling simultaneously for a folded antenna with two gaps. Values for a circuit model are found using an electrostatic finite element code and a full wave frequency domain finite element code. The circuit model is then validated by a full wave finite difference time domain code. For the time domain analysis the antenna structure is excited by fields from a lightning pulse. The time domain simulation has excellent agreement with the circuit model that is presented. C1 [Perkins, Michael P.; Ong, Mike M.; Robbins, Christopher L.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Perkins, MP (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA. EM perkins22@llnl.gov NR 14 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2158-110X BN 978-1-4673-2060-3 J9 IEEE INT SYMP ELEC PY 2012 BP 111 EP 116 PG 6 WC Engineering, Electrical & Electronic SC Engineering GA BEJ75 UT WOS:000316991700022 ER PT S AU Dominguez, D Parks, MJ Williams, AD Washburn, S AF Dominguez, Dean Parks, Mancel Jordan Williams, Adam D. Washburn, Susan BE Pritchard, DA TI Special Nuclear Material and Critical Infrastructure Security Modeling and Simulation of Physical Protection Systems SO 46TH ANNUAL 2012 IEEE INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY TECHNOLOGY SE International Carnahan Conference on Security Technology Proceedings LA English DT Proceedings Paper CT 46th Annual IEEE International Carnahan Conference on Security Technology (ICCST) CY OCT 15-18, 2012 CL Boston, MA SP IEEE, Chung Shan Inst Sci, IEEE Aerosp & Elect Syst Soc (AESS), Natl Cent Univ, Sandia Natl Labs, Volpe Ctr, FLIR, US Amer, Dept Transformat AB Over the last decade, the world has faced a rapidly expanding and dynamic threat environment. As demonstrated by the 9/11 and 26/11 terrorist attacks, adversary capabilities have evolved to include advanced tactics and increased militancy. For the Department of Energy's National Nuclear Security Administration (DOE/NNSA), and other organizations responsible for protecting facilities housing special nuclear materials, this fragile mix of global uncertainty makes nuclear weapon security an important challenge. Sandia, using scientific and mathematic methodologies, is considered one of the world leaders in the design and implementation of physical protection systems (PPS) and VA methodology, in order to reduce the risk to both domestic and international high consequence facilities. Using the Presagis commercial software suite - primarily Scenario Toolkit and Generation Environment (STAGE), a complex simulation engine - the authors have developed a single analyst, Monte Carlo derived, agent decision-based, and event-driven interactive tool to help meet this need. Evaluating risk reduction for critical infrastructure against increasingly complex adversaries requires high fidelity VA modeling tools. Advanced adversary capabilities require modeling complex scenario variables, including multiple attack vectors and dynamically selected targets of opportunity. Large threat profiles with complex character behavior are needed for increasing adversary militancy. Coupled with Sandia methodology, the strength of the tool stems from the decision logic structure and built-in artificial intelligence components. STAGE allows for an inclusive command and control VA model that uses all traditional elements of a PPS (detection, communication, assessment, delay, command and control, response, interdiction, attrition, and neutralization). This paper will briefly describe the effect that the current threat environment has had on the VA process and then outline the role of STAGE in VA modeling and new threat reduction methodology. This paper also provides an update to the development of the STAGE tool, as well as a description of future plans to advance VA methodology and integrate STAGE simulation analysis with an existing physical site (the Integrated Security Facility at Sandia - a former Category I facility). C1 [Dominguez, Dean; Parks, Mancel Jordan; Williams, Adam D.; Washburn, Susan] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Dominguez, D (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM ddoming@sandia.gov; mjparks@sandia.gov; adwilli@sandia.gov; svvashbu@sandia.gov NR 2 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1071-6572 BN 978-1-4673-2451-9 J9 INT CARN CONF SECU PY 2012 BP 10 EP 14 PG 5 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ66 UT WOS:000316952800002 ER PT S AU Murton, MD vanDongen, DT Ross, MP Bouchier, FA AF Murton, Mark D. vanDongen, Dale T. Ross, Michael P. Bouchier, Francis A. BE Pritchard, DA TI Toward a Performance Requirement for Sensored Conformable Apertures SO 46TH ANNUAL 2012 IEEE INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY TECHNOLOGY SE International Carnahan Conference on Security Technology Proceedings LA English DT Proceedings Paper CT 46th Annual IEEE International Carnahan Conference on Security Technology (ICCST) CY OCT 15-18, 2012 CL Boston, MA SP IEEE, Chung Shan Inst Sci, IEEE Aerosp & Elect Syst Soc (AESS), Natl Cent Univ, Sandia Natl Labs, Volpe Ctr, FLIR, US Amer, Dept Transformat DE Intrusion detection; nuisance alarm; anthropometry AB Technological advances provide new capabilities to increase the robustness of security systems, but can also potentially add new vulnerabilities. New capability sometimes requires new performance requirements. This paper outlines an approach to establishing a crucial performance requirement for an emerging intrusion detection sensor: the sensored net. Throughout the security industry, the commonly adopted standard for maximum opening size through barriers is a requirement based on square inches-typically 96 square inches (620.1 square centimeters). The dimensions of a flexible aperture, unlike those of standard rigid openings, are not fixed, but are variable and conformable. It has been demonstrated that a human intruder can move through a 96-square-inch opening that is conformable to the human body with ease. The longstanding 96-square-inch requirement itself, though firmly embedded in policy and best practice, lacks a documented empirical basis. This paper proposes to define a new requirements approach for flexible netting intrusion detection systems that is risk based and documented. An illustrative requirement is developed based on performance testing and statistical analysis to validate this approach. C1 [Murton, Mark D.; vanDongen, Dale T.; Ross, Michael P.; Bouchier, Francis A.] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Murton, MD (reprint author), Sandia Natl Labs, POB 5800,MS 1006, Albuquerque, NM 87185 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1071-6572 BN 978-1-4673-2451-9 J9 INT CARN CONF SECU PY 2012 BP 22 EP 26 PG 5 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ66 UT WOS:000316952800004 ER PT S AU Lin, H Schwartz, M Michalski, J Shakamuri, M Campbell, P AF Lin, Han Schwartz, Moses Michalski, John Shakamuri, Mayuri Campbell, Philip BE Pritchard, DA TI Leveraging a Crowd Sourcing Methodology to Enhance Supply Chain Integrity SO 46TH ANNUAL 2012 IEEE INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY TECHNOLOGY SE International Carnahan Conference on Security Technology Proceedings LA English DT Proceedings Paper CT 46th Annual IEEE International Carnahan Conference on Security Technology (ICCST) CY OCT 15-18, 2012 CL Boston, MA SP IEEE, Chung Shan Inst Sci, IEEE Aerosp & Elect Syst Soc (AESS), Natl Cent Univ, Sandia Natl Labs, Volpe Ctr, FLIR, US Amer, Dept Transformat DE Security; Integrity; Supply chain; Risk AB Supply chain integrity (SCI) is emerging as one of the top security issues facing critical systems. The government's reliance on commercial off-the-shelf (COTS) products is apparent, as is the threat of critical systems being designed and manufactured overseas. To date, few tools or capabilities exist to prevent or even detect these classes of attacks. Programs, such as DARPA Trust, exist to identify solutions; however, alternative strategies must be explored. It is extremely challenging to establish the trustworthiness of a supply chain for a product or system in today's globalized climate, especially given the complexity and variability of the hardware and software, and the diverse geographical areas where they are made. Counterfeit items, from individual chips to entire systems, have been found both in commercial and government sectors. Supply chain attacks can be inserted at any point during the product or system life cycle and can have detrimental effects to mission success. We hypothesize that wisdom of crowds techniques may be applicable to the analysis of supply chain integrity. Current supply chain security efforts are hindered by a lack of detailed information on a product's entire supply chain. End-users have virtually no access to supply chain information, and even major manufacturers may have difficulty getting access to their suppliers' sub-suppliers. Component testing and even reverse engineering can be used to mitigate risks, but these approaches are imperfect, time consuming, and expensive. This paper will discuss the development of a semi-automated supply chain integrity risk analysis framework to assist the supply chain security analysts in assessing the level of risk associated with a component of a mission critical system. This capability can provide the system designer a more rigorous and efficient approach to assess the security of the components in the design. By fusing all of these tools into a centralized framework, we hypothesis that we can create a capability that will enable analysts to more effectively interrogate the data and extract trending as well as critical information. C1 [Lin, Han; Schwartz, Moses; Michalski, John; Shakamuri, Mayuri; Campbell, Philip] Sandia Natl Labs, Networked Syst Survivabil & Assurance Dept, Albuquerque, NM 87185 USA. RP Lin, H (reprint author), Sandia Natl Labs, Networked Syst Survivabil & Assurance Dept, POB 5800, Albuquerque, NM 87185 USA. NR 8 TC 1 Z9 1 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1071-6572 BN 978-1-4673-2451-9 J9 INT CARN CONF SECU PY 2012 BP 27 EP 33 PG 7 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ66 UT WOS:000316952800005 ER PT S AU Dabling, JG McLaughlin, JO Andersen, JJ AF Dabling, Jeffrey G. McLaughlin, James O. Andersen, Jason J. BE Pritchard, DA TI Design and Performance Testing of an Integrated Detection and Assessment Perimeter System SO 46TH ANNUAL 2012 IEEE INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY TECHNOLOGY SE International Carnahan Conference on Security Technology Proceedings LA English DT Proceedings Paper CT 46th Annual IEEE International Carnahan Conference on Security Technology (ICCST) CY OCT 15-18, 2012 CL Boston, MA SP IEEE, Chung Shan Inst Sci, IEEE Aerosp & Elect Syst Soc (AESS), Natl Cent Univ, Sandia Natl Labs, Volpe Ctr, FLIR, US Amer, Dept Transformat DE perimeter security; sensor fusion; detection; VMD; NAR; machine learning; SOA; SEIWG AB Kontek Industries (Kannapolis, NC) and their subsidiary, Stonewater Control Systems (Kannapolis, NC), have entered into a cooperative research and development agreement with Sandia National Laboratories (Albuquerque, NM) to jointly develop and evaluate an integrated perimeter security solution, one that couples access delay with detection and assessment. This novel perimeter solution is designed to be sufficiently flexible for implementation at a wide range of facility types, from high security military or government installations to commercial power plants, to industrial facilities of various kinds. A prototype section of barrier has been produced and installed at the Sandia Exterior Intrusion Sensor Testing Facility in Albuquerque, NM. The prototype was implemented with a robust vehicle barrier and coupled with a variety of detection and assessment solutions to demonstrate both the effectiveness of such a solution, as well as the flexibility of the system. In this implementation, infrared sensors and fence disturbance sensors are coupled with a video motion detection sensor and ground sensors. The ability of the system to properly detect pedestrian or vehicle attempts to bypass, breach, or otherwise defeat the system will be characterized, as well as the Nuisance Alarm Rate. C1 [Dabling, Jeffrey G.] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. [McLaughlin, James O.] Stonewater Control Syst Inc, Subsidiary Kontek Ind Inc, kannapolis, NC 28083 USA. [Andersen, Jason J.] Sandia Natl Labs, Robot Secur Syst, Albuquerque, NM 87185 USA. RP Dabling, JG (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM jgdabli@sandia.gov; jim@stonewatercontrols.com; jjander@sandia.gov NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1071-6572 BN 978-1-4673-2451-9 J9 INT CARN CONF SECU PY 2012 BP 34 EP 42 PG 9 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ66 UT WOS:000316952800006 ER PT S AU Duran, FA AF Duran, Felicia A. BE Pritchard, DA TI Probabilistic Basis and Assessment Methodology for Effectiveness of Protecting Nuclear Materials SO 46TH ANNUAL 2012 IEEE INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY TECHNOLOGY SE International Carnahan Conference on Security Technology Proceedings LA English DT Proceedings Paper CT 46th Annual IEEE International Carnahan Conference on Security Technology (ICCST) CY OCT 15-18, 2012 CL Boston, MA SP IEEE, Chung Shan Inst Sci, IEEE Aerosp & Elect Syst Soc (AESS), Natl Cent Univ, Sandia Natl Labs, Volpe Ctr, FLIR, US Amer, Dept Transformat DE insider threat analysis; integrated material control and physical security; security system path analysis; security system effectiveness AB Safeguards and security systems for nuclear facilities include material control and accounting (MC&A) and a physical protection system (PPS) to protect against theft, sabotage and other malevolent human acts. The insider threat is most often addressed as part of the evaluation of a facility's PPS. A PPS is evaluated using probabilistic analysis of adversary paths on the basis of detection, delay, and response timelines to determine timely detection. Because insider adversaries have access to, knowledge of, and authority for facility operations, the PPS actually provides minimal protection against the insider threat. By monitoring and tracking critical materials, MC&A activities are an important protection element against inside adversaries. Timely detection for MC&A activities, however, has been difficult to determine so that for the most part, the effectiveness of these activities has not been explicitly incorporated in the insider threat evaluation of a PPS. This paper presents research on a new approach to incorporate MC&A protection elements explicitly within the existing probabilistic path analysis methodology. MC&A activities, from monitoring to inventory measurements, provide many, often recurring opportunities to determine the status of critical items, including detection of missing materials. Human reliability analysis methods for nuclear power plant operations are used to determine human error probabilities to characterize the detection capabilities of MC&A activities. An object-based state machine paradigm was developed to characterize the path elements and timing of an insider theft scenario as a race against MC&A detection that can move a facility from a normal state to an alert state having additional detection opportunities. Event sequence diagrams describe insider paths through the PPS and also incorporate MC&A activities as path elements. To address the insider threat, this work establishes a probabilistic basis for timely MC&A detection and methods to evaluate the effectiveness of MC&A activities explicitly within the existing path analysis methodology. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Duran, FA (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM faduran@.sandia.gov NR 6 TC 0 Z9 0 U1 0 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1071-6572 BN 978-1-4673-2451-9 J9 INT CARN CONF SECU PY 2012 BP 43 EP 52 PG 10 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ66 UT WOS:000316952800007 ER PT S AU Vugrin, ED Stamber, KL Baca, M Kao, G Le, H Mitchell, M Ramirez, R Welch, K AF Vugrin, Eric D. Stamber, Kevin L. Baca, Michael Kao, Gio Le, Hai Mitchell, Michael Ramirez, Rick Welch, Kim BE Pritchard, DA TI A Mission Resilience Assessment Methodology for Infrastructure Disruptions SO 46TH ANNUAL 2012 IEEE INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY TECHNOLOGY SE International Carnahan Conference on Security Technology Proceedings LA English DT Proceedings Paper CT 46th Annual IEEE International Carnahan Conference on Security Technology (ICCST) CY OCT 15-18, 2012 CL Boston, MA SP IEEE, Chung Shan Inst Sci, IEEE Aerosp & Elect Syst Soc (AESS), Natl Cent Univ, Sandia Natl Labs, Volpe Ctr, FLIR, US Amer, Dept Transformat DE mission assurance; resilience; electric power; systems analysis AB Resilience has recently emerged as a security priority, but the development of mission resilience analysis techniques for military systems has lagged behind those for other systems. This paper identifies gaps for mission resilience assessment in current vulnerability assessment approaches used at military facilities. Additionally, the paper describes ongoing research to develop a set of mission resilience models that addresses those gaps and could be used to evaluate mission resilience to electric power outages. C1 [Vugrin, Eric D.; Stamber, Kevin L.; Baca, Michael; Kao, Gio; Le, Hai; Mitchell, Michael; Ramirez, Rick; Welch, Kim] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Vugrin, ED (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 7 TC 0 Z9 0 U1 1 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1071-6572 BN 978-1-4673-2451-9 J9 INT CARN CONF SECU PY 2012 BP 53 EP 58 PG 6 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ66 UT WOS:000316952800008 ER PT S AU Choi, S Zage, D AF Choi, Sung Zage, David BE Pritchard, DA TI Addressing Insider Threat using "Where You Are" as Fourth Factor Authentication SO 46TH ANNUAL 2012 IEEE INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY TECHNOLOGY SE International Carnahan Conference on Security Technology Proceedings LA English DT Proceedings Paper CT 46th Annual IEEE International Carnahan Conference on Security Technology (ICCST) CY OCT 15-18, 2012 CL Boston, MA SP IEEE, Chung Shan Inst Sci, IEEE Aerosp & Elect Syst Soc (AESS), Natl Cent Univ, Sandia Natl Labs, Volpe Ctr, FLIR, US Amer, Dept Transformat ID SYSTEMS AB Current physical and cybersecurity systems have been relying on traditional three factor authentication to mitigate the threats posed by insider attacks. Typically, systems use one or two of the following factors to authenticate end-users: what you know (e.g., password), what you have (e.g., RSA Ill), or what you are (e.g., fingerprint). Systems based on these factors have the following limitations: 1) access is typically bound to a single authentication occurrence leading to remote vulnerabilities, 2) the factors have little impact against persistent insider threats, and 3) many of the authentication systems violate system design principles such as user psychological acceptability by inconveniencing the end-users. In order to mitigate the identified limitations, we propose the usage of "where you are" as a complementary factor that can significantly improve both cybersecurity and physical security. Having accurate location tracking as a new factor for authentication: 1) provides continuous identification tracking and continuous mediation of access to resources, 2) requires remote threats to acquire a physical presence, 3) allows for the enforcement of cybersecurity and physical security policies in real-time through automation, and 4) provides enhanced security without inconveniencing the end-users. Using the strength of location as an authentication factor, this paper specifies design requirements that must be present in an insider-threat Prevention System (iTPS) that is capable of actively monitoring malicious insider behaviors. iTPS has the potential to radically change the physical protection systems and cybersecurity landscape by providing practitioners with the first-of-its-kind tool for real-time insider-threat prevention capabilities. iTPS is particularly suited to address the safety and security needs of critical infrastructure, nuclear facilities, and emergency response situations. C1 [Choi, Sung; Zage, David] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Choi, S (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM schoi@sandia.gov; djzage@sandia.gov NR 23 TC 0 Z9 0 U1 1 U2 6 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1071-6572 BN 978-1-4673-2451-9 J9 INT CARN CONF SECU PY 2012 BP 147 EP 153 PG 7 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ66 UT WOS:000316952800021 ER PT S AU Campbell, P AF Campbell, Philip BE Pritchard, DA TI Department of Defense Instruction 8500.2 "Information Assurance (IA) Implementation:" A Retrospective SO 46TH ANNUAL 2012 IEEE INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY TECHNOLOGY SE International Carnahan Conference on Security Technology Proceedings LA English DT Proceedings Paper CT 46th Annual IEEE International Carnahan Conference on Security Technology (ICCST) CY OCT 15-18, 2012 CL Boston, MA SP IEEE, Chung Shan Inst Sci, IEEE Aerosp & Elect Syst Soc (AESS), Natl Cent Univ, Sandia Natl Labs, Volpe Ctr, FLIR, US Amer, Dept Transformat DE DoDI 8500.2; DITSCAP; DIACAP; NIST 800-53; CoBIT; control sets AB From the time of its publication on February 6, 2003, the Department of Defense Instruction 8500.2 "Information Assurance (IA) Implementation" (DoDI 8500.2) has provided the definitions and controls that form the basis for IA across the DoD. This is the document to which compliance has been mandatory. For over 9 years, as the world of computer security has swirled through revision after revision and upgrade after upgrade, moving, for example, from DITSCAP to DIACAP, this instruction has remained unrevised, in its original form. As this venerable instruction now nears end of life it is appropriate that we step back and consider what we have learned from it and what its place is in context. In this paper we first review the peculiar structure of DoDI 8500.2, including its attachments, its "Subject Areas," its " baseline IA levels," its implicit use of type, signatures (full, half, left, and right), and signature patterns, along with span, and class. To provide context and contrast we briefly present three other control sets, namely (1) the DITSCAP checklists that preceded DoDI 8500.2, (2) the up and coming NIST 80053 that it appears will follow DoDI 8500.2, and (3) CoBIT from the commercial world. We then compare the scope of DoDI 8500.2 with those three control sets. The paper concludes with observations concerning DoDI 8500.2 and control sets in general. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Campbell, P (reprint author), Sandia Natl Labs, POB 5800,MS 0672, Albuquerque, NM 87185 USA. NR 15 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1071-6572 BN 978-1-4673-2451-9 J9 INT CARN CONF SECU PY 2012 BP 187 EP 194 PG 8 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ66 UT WOS:000316952800027 ER PT S AU Cano, LA AF Cano, Lester A. BE Pritchard, DA TI Using Neural Networks for Extended Detection SO 46TH ANNUAL 2012 IEEE INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY TECHNOLOGY SE International Carnahan Conference on Security Technology Proceedings LA English DT Proceedings Paper CT 46th Annual IEEE International Carnahan Conference on Security Technology (ICCST) CY OCT 15-18, 2012 CL Boston, MA SP IEEE, Chung Shan Inst Sci, IEEE Aerosp & Elect Syst Soc (AESS), Natl Cent Univ, Sandia Natl Labs, Volpe Ctr, FLIR, US Amer, Dept Transformat AB Extended Detection (ED) has become required especially when protecting high valued assets. Physical Protection Systems (PPS) usually integrate Detection, Delay, and Response (DDR) elements in a manner to assess threats at well defined perimeters. Situational Awareness (SA) beyond PPS perimeters requires the use of longer range sensors systems such as Radars or Unattended Ground Sensors which cover relatively large areas. Gathering such sensor data, especially in high noise environments poses a serious challenge to building reliable ED systems. The use of Neural Networks to merge sensor data and identify potential threats can make SA systems available for broader use. C1 Sandia Natl Labs, Livermore, CA 94550 USA. RP Cano, LA (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA. EM lacano@sandia.gov NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1071-6572 BN 978-1-4673-2451-9 J9 INT CARN CONF SECU PY 2012 BP 246 EP 250 PG 5 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ66 UT WOS:000316952800036 ER PT S AU Witzke, EL Brenkosh, JP Green, KL Riblett, LE Wiseman, JM AF Witzke, Edward L. Brenkosh, Joseph P. Green, Karl L. Riblett, Loren E. Wiseman, James M. BE Pritchard, DA TI Encryption in Mobile Wireless Mesh Networks SO 46TH ANNUAL 2012 IEEE INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY TECHNOLOGY SE International Carnahan Conference on Security Technology Proceedings LA English DT Proceedings Paper CT 46th Annual IEEE International Carnahan Conference on Security Technology (ICCST) CY OCT 15-18, 2012 CL Boston, MA SP IEEE, Chung Shan Inst Sci, IEEE Aerosp & Elect Syst Soc (AESS), Natl Cent Univ, Sandia Natl Labs, Volpe Ctr, FLIR, US Amer, Dept Transformat DE encryption; mobile; wireless; mesh networks AB Wireless mesh networks (WMNs) are growing in popularity because of their inherent robustness, versatility, and ease of deployment in situations such as natural or man-made disasters. Another area of potential use for these networks is in physical security systems where they can potentially improve mobile communications, communications with remote locations, temporary communications, and geolocation applications. Since these physical security systems may employ a mobile WMN to transport sensitive or classified information, questions arise as to whether end-to-end encryption would work within a very dynamic WMN. We could not find published data or results concerning this. Therefore, we set out to find whether end-to-end encryption will continue to work through an ever-changing W MN. We examined the behavior of end-to-end encryption when the path through the wireless network changes (that is, when routing is forced through a different intermediate node or nodes) and when traversing a radio frequency (RF) shadow. We especially wished to determine whether a tunnel, as used in software virtual private networks (VPNs) or hardware encryption devices, would survive RF shadow transits and mesh network topology changes. This paper presents an introduction to WMNs, their applicability to physical security systems, our end-to-end encryption experiments, analysis of the results, and our conclusions. C1 [Witzke, Edward L.; Brenkosh, Joseph P.; Green, Karl L.; Riblett, Loren E.; Wiseman, James M.] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Witzke, EL (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM elwitzk@sandia.gov; jpbrenk@sandia.gov; lerible@sandia.gov; jmwisem@sandia.gov NR 6 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1071-6572 BN 978-1-4673-2451-9 J9 INT CARN CONF SECU PY 2012 BP 251 EP 256 PG 6 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ66 UT WOS:000316952800037 ER PT S AU Haddock, PC AF Haddock, Paul C. BE Pritchard, DA TI A Radio Frequency Measurement Technique Utilizing Audio Distortion to Access the Instantaneous Sensitivity of a Security Systems Receiver SO 46TH ANNUAL 2012 IEEE INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY TECHNOLOGY SE International Carnahan Conference on Security Technology Proceedings LA English DT Proceedings Paper CT 46th Annual IEEE International Carnahan Conference on Security Technology (ICCST) CY OCT 15-18, 2012 CL Boston, MA SP IEEE, Chung Shan Inst Sci, IEEE Aerosp & Elect Syst Soc (AESS), Natl Cent Univ, Sandia Natl Labs, Volpe Ctr, FLIR, US Amer, Dept Transformat DE rf; wireless communications; receiver sensitivity; security AB A receiver measurement technique has been demonstrated to assess the instantaneous sensitivity of a security system's radio frequency (RE) receiver. Application of this measurement technique to a security systems wireless link can be used as warning to a system attack, identification of an interference source(s), changes in propagation conditions, or equipment failure. The interference sources may be unintentional or intentional, both of which can affect the performance of the receiver. An RE receiver used in a security system may be used to receive voice, video, telemetry, etc., which most likely is of high importance and/or consequence since it is used to gather information as part of a security system. In most cases, the receivers used in security systems have no indication of instantaneous receiver sensitivity. The measurement technique utilizes an RE audio distortion measurement to characterize the degradation to the communications receiver by providing a quantitative measure to the quality of the receiver's audio signal. This technique provides a way to quantify the performance of an RE receiver under a variety of conditions. The distortion to the audio signal can be the result of conducted, radiated, and/or coupled interference from active components that are within the receiver's passband. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Haddock, PC (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM pchaddo@sandia.gov NR 2 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1071-6572 BN 978-1-4673-2451-9 J9 INT CARN CONF SECU PY 2012 BP 257 EP 260 PG 4 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ66 UT WOS:000316952800038 ER PT S AU Sheaffer, DA Burnett, DC AF Sheaffer, Donald A., Jr. Burnett, David C. BE Pritchard, DA TI Improved Surface Swimmer Detection through Multimodal Data Fusion SO 46TH ANNUAL 2012 IEEE INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY TECHNOLOGY SE International Carnahan Conference on Security Technology Proceedings LA English DT Proceedings Paper CT 46th Annual IEEE International Carnahan Conference on Security Technology (ICCST) CY OCT 15-18, 2012 CL Boston, MA SP IEEE, Chung Shan Inst Sci, IEEE Aerosp & Elect Syst Soc (AESS), Natl Cent Univ, Sandia Natl Labs, Volpe Ctr, FLIR, US Amer, Dept Transformat AB Waterborne intruder detection includes many new challenges not seen in land environments. One area of these challenges is the detection of surface swimmers. Swimmers, whose bodies are partially in air and partially submerged, have significantly reduced target strength (TS) for radar and sonar systems compared to intruders fully in air or fully submerged. This reduced TS results in more frequent missed detections or, if detection threshold is widened, increased nuisance alarms. Depending on sea state, a swimmer is also able to blend in with wave noise, making detection even more difficult. We present. a method for improved surface swimmer detection in marine environments by fusing data from several sensor systems in both air and water domains to isolate a swimmer's signature from uncorrelated events. This system, tested in Dec 2011 in St. Petersburg FL, produced data indicating significantly improved detection over using any single system. By widening detection threshold of each sensor's detection algorithm but fusing data of each system together, more potential targets can be processed without the risk of increasing nuisance alarms. This work holds the potential to improve the security of several types of water-dependent assets, like commercial harbors, Navy or Coast Guard bases, and nuclear and other water-cooled power plans, and offshore oil platforms. C1 [Sheaffer, Donald A., Jr.; Burnett, David C.] Sandia Natl Labs, Livermore, CA 94550 USA. RP Sheaffer, DA (reprint author), Sandia Natl Labs, 7011 East Ave MS 9104, Livermore, CA 94550 USA. NR 2 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1071-6572 BN 978-1-4673-2451-9 J9 INT CARN CONF SECU PY 2012 BP 292 EP 296 PG 5 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ66 UT WOS:000316952800044 ER PT S AU Norman, BC AF Norman, Bradley C. BE Pritchard, DA TI Assessment of Video Analytics for Exterior Intrusion Detection Applications SO 46TH ANNUAL 2012 IEEE INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY TECHNOLOGY SE International Carnahan Conference on Security Technology Proceedings LA English DT Proceedings Paper CT 46th Annual IEEE International Carnahan Conference on Security Technology (ICCST) CY OCT 15-18, 2012 CL Boston, MA SP IEEE, Chung Shan Inst Sci, IEEE Aerosp & Elect Syst Soc (AESS), Natl Cent Univ, Sandia Natl Labs, Volpe Ctr, FLIR, US Amer, Dept Transformat AB When combined with a compatible assessment system, select video analytic devices can provide intrusion detection and target-tracking capabilities. With an attractive relative low cost, demand for video analytics has focused on high probability of detection and low nuisance alarm rate that has prioritized investment toward performance improvements. Modern algorithms offer sophisticated video-based intrusion detection and tracking capabilities that were unavailable a decade earlier. The modern video analytics have been shown to have a significant reduction of previously observed high nuisance alarm rates with improved detection capabilities. This paper includes results of a recent device evaluation performed at Sandia National Laboratories for a representative exterior intrusion detection application. For this limited scope effort, the device was evaluated for probability of detection and monitored for nuisance and false alarms over a six-month period from September 2010 to April 2011 (nuisance alarm cause is detailed). This paper also includes general and specific implementation considerations for video analytics. The author asserts that this work holds potential to improve implementation strategies for video-based detection sensors for several types of exterior perimeter and extended detection-sensing applications, making the case for interoperation and compliance standardization between video and sensor technology vendors for simplified integration of video analytic algorithms into security platforms. C1 Sandia Natl Labs, Livermore, CA 94550 USA. RP Norman, BC (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA. EM bnorma@sandia.gov NR 4 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1071-6572 BN 978-1-4673-2451-9 J9 INT CARN CONF SECU PY 2012 BP 359 EP 362 PG 4 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ66 UT WOS:000316952800054 ER PT S AU Haddock, PC Hatley, JW Morse, WD Tooley, RD AF Haddock, Paul C. Hatley, John W. Morse, William D. Tooley, Robert D. BE Pritchard, DA TI Integrated Communications and Navigation Module SO 46TH ANNUAL 2012 IEEE INTERNATIONAL CARNAHAN CONFERENCE ON SECURITY TECHNOLOGY SE International Carnahan Conference on Security Technology Proceedings LA English DT Proceedings Paper CT 46th Annual IEEE International Carnahan Conference on Security Technology (ICCST) CY OCT 15-18, 2012 CL Boston, MA SP IEEE, Chung Shan Inst Sci, IEEE Aerosp & Elect Syst Soc (AESS), Natl Cent Univ, Sandia Natl Labs, Volpe Ctr, FLIR, US Amer, Dept Transformat DE wireless; communications; Iridium; GPS; tracking; satellite AB An iridium communications and navigation module (ICNM) has been developed for movement tracking applications. External interfaces to the ICNM include Ethernet, RS-232, and Serial Peripheral Interface (SPI) Bus. The module is powered by Power over Ethernet (PoE) or a +24VDC connection. The ICNM fits within the standard PC104 form factor, but utilizes a Modular Component and Sensor Bus (MCSB) interface specification for the high density connector. The ICNM includes a GPS receiver and accelerators for satellite and inertial tracking. The module manages all of the satellite communication control, encryption, and navigation functions that enable its rapid integration as a component into larger systems. C1 [Haddock, Paul C.; Hatley, John W.; Morse, William D.; Tooley, Robert D.] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Haddock, PC (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 1 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1071-6572 BN 978-1-4673-2451-9 J9 INT CARN CONF SECU PY 2012 PG 5 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ66 UT WOS:000316952800058 ER PT J AU Butel, GP Coughenour, BM Macleod, HA Kennedy, CE Angel, JRP AF Butel, Guillaume P. Coughenour, Blake M. Macleod, H. Angus Kennedy, Cheryl E. Angel, J. Roger P. TI Reflectance optimization of second-surface silvered glass mirrors for concentrating solar power and concentrating photovoltaics application SO JOURNAL OF PHOTONICS FOR ENERGY LA English DT Article DE thin film; reflectance; concentrating; solar; mirror; concentrating photovoltaics; concentrating solar power; triple junction ID TOWER-REFLECTOR; COLLECTORS; TROUGH; DURABILITY; TELESCOPES; DESIGN AB Methods developed to maximize the overall reflectance of the second-surface silvered glass used in concentrating solar power (CSP) and concentrating photovoltaics (CPV) solar systems are reported. The reflectance at shorter wavelengths is increased with the aid of a dielectric enhancing layer between the silver and the glass, while at longer wavelengths it is enhanced by use of glass with negligible iron content. The calculated enhancement of reflectance, compared to unenhanced silver on standard low-iron float glass, corresponds to a 4.5% increase in reflectance averaged across the full solar spectrum, appropriate for CSP, and 3.5% for CPV systems using triple junction cells. An experimental reflector incorporating these improvements, of drawn crown glass and a silvered second-surface with dielectric enhancement, was measured at National Renewable Energy Laboratory to have 95.4% solar weighted reflectance. For comparison, nonenhanced, wet-silvered reflectors of the same 4-mm thickness show reflectance ranging from 91.6% to 94.6%, depending on iron content. A potential drawback of using iron-free drawn glass is reduced concentration in high concentration systems because of the inherent surface errors. This effect is largely mitigated for glass shaped by slumping into a concave mold, rather than by bending. Finally, an experiment capable of determining which junction limits the triple junction cell is demonstrrated. (C) 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.JPE.2.021808] C1 [Butel, Guillaume P.; Coughenour, Blake M.; Macleod, H. Angus; Angel, J. Roger P.] Univ Arizona, Ctr Opt Sci, Tucson, AZ 85721 USA. [Kennedy, Cheryl E.] Natl Renewable Energy Lab, Golden, CO 80401 USA. [Angel, J. Roger P.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. RP Butel, GP (reprint author), Univ Arizona, Ctr Opt Sci, 1630 E Univ Bldg, Tucson, AZ 85721 USA. EM butel.guillaume@gmail.com FU DOE [DE-FG36-08-GO88002]; Science Foundation Arizona; Cottrell Foundation; REhnu LLC; U.S. Department of Energy [DE-AC36-08-GO28308]; National Renewable Energy Laboratory FX We gratefully acknowledge support from the DOE under award DE-FG36-08-GO88002, from Science Foundation Arizona, the Cottrell Foundation, and from REhnu LLC. This work was supported by the U.S. Department of Energy under Contract No. DE-AC36-08-GO28308 with the National Renewable Energy Laboratory. NR 36 TC 2 Z9 2 U1 4 U2 19 PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 1947-7988 J9 J PHOTON ENERGY JI J. Photonics Energy PY 2012 VL 2 SI 4 AR 021808 DI 10.1117/1.JPE.2.021808 PG 13 WC Materials Science, Multidisciplinary; Optics; Physics, Applied SC Materials Science; Optics; Physics GA 128AF UT WOS:000317739600008 ER PT J AU VanSant, K AF VanSant, Kaitlyn TI Guest Editorial: High and Low Concentrator Systems for Solar Electric Applications SO JOURNAL OF PHOTONICS FOR ENERGY LA English DT Editorial Material C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP VanSant, K (reprint author), Natl Renewable Energy Lab, 15013 Denver West Pkwy, Golden, CO 80401 USA. NR 0 TC 0 Z9 0 U1 0 U2 2 PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 1947-7988 J9 J PHOTON ENERGY JI J. Photonics Energy PY 2012 VL 2 SI 4 AR 021899 DI 10.1117/1.JPE.2.021899 PG 1 WC Materials Science, Multidisciplinary; Optics; Physics, Applied SC Materials Science; Optics; Physics GA 128AF UT WOS:000317739600009 ER PT S AU Anderson, B Storlie, C Lane, T AF Anderson, Blake Storlie, Curtis Lane, Terran BE Zaki, MJ Siebes, A Yu, JX Goethals, B Webb, G Wu, X TI Multiple Kernel Learning Clustering with an Application to Malware SO 12TH IEEE INTERNATIONAL CONFERENCE ON DATA MINING (ICDM 2012) SE IEEE International Conference on Data Mining LA English DT Proceedings Paper CT 12th IEEE International Conference on Data Mining (ICDM) CY DEC 10-13, 2012 CL Brussels, BELGIUM SP IEEE, IEEE Comp Soc (CS), Natl Sci Fdn (NSF), FWO, IBM, SAS, Yahoo, NASA, Biside, KNIME, Univ Antwerpen, Univ Libre Bruxelles (ULB) DE Multiple Kernel Learning; Spectral Clustering; Semidefinite Programming; Malware AB With the increasing prevalence of richer, more complex data sources, learning with multiple views is becoming more widespread. Multiple kernel learning (MKL) has been developed to address this problem, but in general, the solutions provided by traditional MKL are restricted to a classification objective function. In this work, we develop a novel multiple kernel learning algorithm that is based on a spectral clustering objective function which is able to find an optimal kernel weight vector for the clustering problem. We go on to show how this optimization problem can be cast as a semidefinite program and efficiently solved using off-the-shelf interior point methods. C1 [Anderson, Blake; Storlie, Curtis] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. [Anderson, Blake; Lane, Terran] Univ New Mexico, Albuquerque, NM 87131 USA. [Lane, Terran] Google Inc, Mountain View, CA 94041 USA. RP Anderson, B (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM banderson@lanl.gov; storlie@lanl.gov; tdrl@google.com NR 16 TC 2 Z9 2 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1550-4786 BN 978-1-4673-4649-8; 978-0-7695-4905-7 J9 IEEE DATA MINING PY 2012 BP 804 EP 809 DI 10.1109/ICDM.2012.75 PG 6 WC Computer Science, Artificial Intelligence; Computer Science, Information Systems SC Computer Science GA BEF30 UT WOS:000316383800082 ER PT S AU Huang, H Qin, H Yoo, S Yu, DT AF Huang, Hao Qin, Hong Yoo, Shinjae Yu, Dantong BE Zaki, MJ Siebes, A Yu, JX Goethals, B Webb, G Wu, X TI bef3 A New Anomaly Detection Algorithm based on Quantum Mechanics SO 12TH IEEE INTERNATIONAL CONFERENCE ON DATA MINING (ICDM 2012) SE IEEE International Conference on Data Mining LA English DT Proceedings Paper CT 12th IEEE International Conference on Data Mining (ICDM) CY DEC 10-13, 2012 CL Brussels, BELGIUM SP IEEE, IEEE Comp Soc (CS), Natl Sci Fdn (NSF), FWO, IBM, SAS, Yahoo, NASA, Biside, KNIME, Univ Antwerpen, Univ Libre Bruxelles (ULB) DE Anomaly Detection; Quantum Mechanics ID DIFFUSION MAPS AB The primary originality of this paper lies at the fact that we have made the first attempt to apply quantum mechanics theory to anomaly (outlier) detection in high-dimensional datasets for data mining. We propose Fermi Density Descriptor (FDD) which represents the probability of measuring a fermion at a specific location for anomaly detection. We also quantify and examine different Laplacian normalization effects and choose the best one for anomaly detection. Both theoretical proof and quantitative experiments demonstrate that our proposed FDD is substantially more discriminative and robust than the commonly-used algorithms. C1 [Huang, Hao; Qin, Hong] SUNY Stony Brook, Dept Comp Sci, Stony Brook, NY 11794 USA. [Yoo, Shinjae; Yu, Dantong] Brookhaven Natl Lab, Computat Sci Ctr, Upton, NY USA. RP Huang, H (reprint author), SUNY Stony Brook, Dept Comp Sci, Stony Brook, NY 11794 USA. EM haohuang@cs.stonybrook.edu; qin@cs.stonybrook.edu; sjyoo@bnl.gov; dtyu@bnl.gov FU NSF [IIS-0949467, IIS-1047715, IIS-1049448]; DOE [DE-SC0003361, DE-AC02-98CH10886] FX We thank valuable help from Dr. Yan Li in BNL, and all the anonymous reviewers for constructive suggestions. This research is supported in part by NSF grants IIS- 0949467, IIS-1047715, IIS-1049448, DOE grants DE-SC0003361 and DE-AC02-98CH10886. NR 20 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1550-4786 BN 978-1-4673-4649-8; 978-0-7695-4905-7 J9 IEEE DATA MINING PY 2012 BP 900 EP 905 DI 10.1109/ICDM.2012.127 PG 6 WC Computer Science, Artificial Intelligence; Computer Science, Information Systems SC Computer Science GA BEF30 UT WOS:000316383800098 ER PT B AU Anderson, JT Byrum, K Drake, G Krennrich, F Kreps, A Oberling, M Orr, M Schroedter, M Weinstein, A Zitzer, B AF Anderson, John T. Byrum, Karen Drake, Gary Krennrich, Frank Kreps, Andrew Oberling, Michael Orr, Matthew Schroedter, Martin Weinstein, Amanda Zitzer, Benjamin GP IEEE TI Commissioning and Performance of a Fast Level-2 Trigger System at VERITAS SO 2012 18TH IEEE-NPSS REAL TIME CONFERENCE (RT) LA English DT Proceedings Paper CT 18th IEEE-NPSS Real Time Conference (RT) CY JUN 09-15, 2012 CL Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab), Berkeley, CA SP IEEE, Nucl & Plasma Sci Soc, Univ Calif HO Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab) AB We have built a new three-stage FPGA-based highspeed trigger for VERITAS, an array of ground-based imaging atmospheric Cherenkov telescopes (IACTs) located in Arizona. This trigger has the ability to recognize patterns of Cherenkov light generated by atmospheric air showers initiated by incident extra-terrestrial gamma rays. The new trigger has programmable coincidence recognition timing and programmable delay compensation over 499 pixel channels in an IACT camera. Measurement of and compensation for systemic variations is achieved through the use of an FPGA-based time-to-digital converter (TDC) and FPGA-based programmable delay elements. The trigger pattern is the coincidence of any three adjacent pixels within the camera. The minimum coincidence window of 3ns with low dead time provides sensitivity at lower energies than were achieved previously. The new trigger has now been successfully installed on all four of the IACTs of VERITAS, replacing the previous system. We present measurements of the performance of this new trigger in comparison with that of the previous system and of the effect of the new trigger upon overall array performance. C1 [Anderson, John T.; Byrum, Karen; Drake, Gary; Kreps, Andrew; Oberling, Michael; Zitzer, Benjamin] Argonne Natl Lab, 9700 S Cass Ave, Lemont, IL 60439 USA. [Krennrich, Frank; Orr, Matthew; Weinstein, Amanda] Iowa State Univ, Ames, IA 50011 USA. [Schroedter, Martin] Smithsonian Astrophys Observ, Amado, AZ 85645 USA. RP Anderson, JT (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Lemont, IL 60439 USA. EM jta@anl.gov; Schroedter@veritas.sao.arizona.edu; amandajw@mail.iastate.edu FU U. S. Department of Energy, Office of Science [DEAC0206CH11357] FX This work was supported in part by the U. S. Department of Energy, Office of Science, under contract DEAC0206CH11357. NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1082-6; 978-1-4673-1083-3 PY 2012 PG 5 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEH30 UT WOS:000316572100099 ER PT J AU Biery, K Green, C Kowalkowski, J Paterno, M Rechenmacher, R AF Biery, K. Green, C. Kowalkowski, J. Paterno, M. Rechenmacher, R. GP IEEE TI artdaq: An Event Filtering Framework for Fermilab Experiments SO 2012 18TH IEEE-NPSS REAL TIME CONFERENCE (RT) LA English DT Proceedings Paper CT 18th IEEE-NPSS Real Time Conference (RT) CY JUN 09-15, 2012 CL Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab), Berkeley, CA SP IEEE, Nucl and Plasma Sci Soc (NPSS), Univ Calif HO Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab) AB Several current and proposed experiments at the Fermi National Accelerator Laboratory have novel data acquisition needs. These include (1) continuous digitization, using commercial high-speed digitizers, of signals from the detectors, (2) the transfer of all of the digitized waveform data to commodity processors, (3) the filtering or compression of the waveform data, or both, and (4) the writing of the resultant data to disk for later, more complete, analysis. To address these needs, members of the Accelerator and Detector Simulation and Support Department within the Scientific Computing Division at Fermilab have chosen to use parallel processing technologies in the development of a generic data acquisition toolkit, artdaq. The artdaq toolkit uses MPI (Message Passing Interface) and art, an established common event framework for Intensity Frontier experiments. In an artdaq program, the digitized data are transferred into processors nodes using commodity PCIe cards, event fragments are combined into complete events using MPI, and filtering and compression algorithms are run on the data using art. To test the toolkit, a cluster of five 32-core high-performance computing nodes has been assembled and connected with a QDR InfiniBand network. Initial testing of data throughput shows event building rates in excess of 1.5GB/s. This paper describes the architecture and implementation of the first phase of the artdaq toolkit and shows early performance results with configurations that match upcoming experiments such as Mu2e, NOvA, and DarkSide-50. C1 [Biery, K.; Green, C.; Kowalkowski, J.; Paterno, M.; Rechenmacher, R.] Fermilab Natl Accelerator Lab, Div Comp Sci, Batavia, IL 60510 USA. RP Biery, K (reprint author), Fermilab Natl Accelerator Lab, Div Comp Sci, POB 500, Batavia, IL 60510 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1082-6 PY 2012 PG 8 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEH30 UT WOS:000316572100122 ER PT B AU Cichalewski, W Branlard, J Schlarb, H Carwardine, J Napieralski, A AF Cichalewski, W. Branlard, J. Schlarb, H. Carwardine, J. Napieralski, A. GP IEEE TI Superconducting Cavities Automatic Loaded Quality Factor Control at FLASH SO 2012 18TH IEEE-NPSS REAL TIME CONFERENCE (RT) LA English DT Proceedings Paper CT 18th IEEE-NPSS Real Time Conference (RT) CY JUN 09-15, 2012 CL Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab), Berkeley, CA SP IEEE, Nucl & Plasma Sci Soc, Univ Calif HO Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab) AB The well-established technology of superconducting niobium cavities (TESLA) finds an increasing number of applications for linear accelerators in high-energy physics experiments. Together with cavity design and manufacturing, control systems for accelerating field parameters were developed. The digital control system developed for cryomodule operation at the Free Electron Laser in Hamburg (FLASH) is able to perform field amplitude and phase regulation with the precision requested for the multiple user experiments carried at FLASH and according to the required laser light parameters. While new experiments (like the International Linear Collider or the proposed European X-FEL upgrades) are based on the same technology (and similar control systems), they require additional levels of controlling superconducting structures parameters in order to comply with tighter power budget overheads and finer field regulation requirements. Consequently, the possibility of controlling such parameters as cavity loaded quality factor or resonance frequency are becoming more attractive. The necessity and the benefits of regulating these parameters has been described in [1] and [2]. C1 [Cichalewski, W.; Napieralski, A.] Tech Univ Lodz, Dept Microelect & Comp Sci, Ul Wolczanska 221-223, PL-90924 Lodz, Poland. [Branlard, J.] Deutsch Elect Synchrotron, D-22607 Hamburg, Germany. [Carwardine, J.] Argonne Natl Lab, South Cass Avenue Lemont, IL 9700 USA. RP Cichalewski, W (reprint author), Tech Univ Lodz, Dept Microelect & Comp Sci, Ul Wolczanska 221-223, PL-90924 Lodz, Poland. EM wcichal@dmcs.pl; julien.branlard@desy.de RI Napieralski, Andrzej/M-1621-2016 OI Napieralski, Andrzej/0000-0002-3844-3435 NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1082-6; 978-1-4673-1083-3 PY 2012 PG 6 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEH30 UT WOS:000316572100005 ER PT B AU Joseph, J Contarato, D Denes, P Doering, D McVittie, P Weizeorick, J AF Joseph, John Contarato, Devis Denes, Peter Doering, Dionisio McVittie, Patrick Weizeorick, John GP IEEE TI Development of an ATCA Based Data Acquisition System for High Speed, Direct Detection X-Ray Pixel Sensors SO 2012 18TH IEEE-NPSS REAL TIME CONFERENCE (RT) LA English DT Proceedings Paper CT 18th IEEE-NPSS Real Time Conference (RT) CY JUN 09-15, 2012 CL Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab), Berkeley, CA SP IEEE, Nucl & Plasma Sci Soc, Univ Calif HO Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab) AB Large format X-ray pixel sensors operating at frame rates higher than 100 frames per second have driven the need to develop data acquisition systems capable of handling large volumes of acquired data using ultra-fast communication links operating at 10 Gigabit/s rates. The new generation 1 Megapixel X-Ray cameras currently being developed at LBNL, operating at readout speeds of up to 200 frames per second, are capable of producing greater than 400 Megabytes of image data per second. Because these sensors are used in continuous source applications with long acquisition periods (e. g., at synchrotron radiation light sources), the acquired data must be reliably processed and stored in real-time to minimize exposure dead time or data loss that could compromise the integrity of the data and thus limit the scientific reach of the experiment. This work describes the development and performance of an Advanced Telecommunications Computing Architecture (ATCA) based data acquisition system used for high speed, direct detection X-ray pixel sensors, focusing on the technical challenges and solutions of moving large data volumes through digital signal processing algorithms and to storage arrays in real-time. C1 [Joseph, John; Contarato, Devis; Denes, Peter; Doering, Dionisio; McVittie, Patrick; Weizeorick, John] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Joseph, J (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM jmjoseph@lbl.gov; dcontarato@lbl.gov; pdenes@lbl.gov; ddoering@lbl.gov; pjmcvittie@lbl.gov; weizeor@aps.anl.gov NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1082-6; 978-1-4673-1083-3 PY 2012 PG 5 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEH30 UT WOS:000316572100030 ER PT J AU Moffit, B Abbott, D Gu, W Gyurjyan, V Heyes, G Jastrzembski, E Timmer, C AF Moffit, Bryan Abbott, David Gu, William Gyurjyan, Vardan Heyes, Graham Jastrzembski, Ed Timmer, Carl GP IEEE TI Real-Time Performance of Commercial Intel-Based VME Controllers for the CODA Data Acquisition System SO 2012 18TH IEEE-NPSS REAL TIME CONFERENCE (RT) LA English DT Proceedings Paper CT 18th IEEE-NPSS Real Time Conference (RT) CY JUN 09-15, 2012 CL Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab), Berkeley, CA SP IEEE, Nucl and Plasma Sci Soc (NPSS), Univ Calif HO Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab) AB We have evaluated the performance of several Intel-based VME Controllers for the use in the data acquisition systems (DAQs) at Jefferson Lab. For the 12 GeV upgrade, PPC-based VME controllers running vxWorks will be replaced with those that are Intel-based running Linux. Their task will be facilitated by the use of FPGAs on the VME modules to perform trigger logic and communicating trigger information over serial and fiber connections through the DAQ. The need for a hard realtime operating system on the VME controller is removed from the equation as the readout of the digitized data from the VME modules (using VME-2eSST) is done in a threaded environment with multiple CPU cores while digitization takes place in the buffered, pipelined system. In this paper we briefly discuss a bench setup for evaluating a VME Controller and its kernel and user space environment. We present results from baseline testing of various models from different vendors using different Linux kernels, including results from a kernel compiled with the CONFIG_PREEMPT_RT patch. C1 [Moffit, Bryan; Abbott, David; Gu, William; Gyurjyan, Vardan; Heyes, Graham; Jastrzembski, Ed; Timmer, Carl] Jefferson Lab, Newport News, VA 23606 USA. RP Moffit, B (reprint author), Jefferson Lab, Newport News, VA 23606 USA. NR 1 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1082-6 PY 2012 PG 4 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEH30 UT WOS:000316572100032 ER PT J AU Norum, WE AF Norum, W. Eric GP IEEE TI Advanced Light Source Control System Upgrade - Intelligent Local Controller Redesign SO 2012 18TH IEEE-NPSS REAL TIME CONFERENCE (RT) LA English DT Proceedings Paper CT 18th IEEE-NPSS Real Time Conference (RT) CY JUN 09-15, 2012 CL Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab), Berkeley, CA SP IEEE, Nucl and Plasma Sci Soc (NPSS), Univ Calif HO Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab) DE ALS; Controls; FPGA AB As part of the control system upgrade at the Advanced Light Source (ALS) the existing intelligent local controller (ILC) modules are being replaced. These modules provide realtime updates of control setpoints and monitored values. This paper describes the architecture and performance of the 'ILC Replacement Modules' which have been developed to take on the duties of the existing modules. The new modules use a 100BaseT network connection to communicate with the ALS Experimental Physics and Industrial Control System (EPICS) and are based on a commercial FPGA evaluation board running a microcontroller-like application. This paper presents results of timing and throughput tests of a prototype module as well as a detailed description of the hardware and software design. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Accelerator Technol Grp, Berkeley, CA 94720 USA. RP Norum, WE (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Accelerator Technol Grp, Berkeley, CA 94720 USA. EM weno-rum@lbl.gov NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1082-6 PY 2012 PG 3 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEH30 UT WOS:000316572100092 ER PT B AU Olsen, J Li, HL Liu, T Okumura, Y Penning, B AF Olsen, Jamieson Li, Ho Ling Liu, Ted Okumura, Yasuyuki Penning, Bjoern GP IEEE TI A Data Formatter for the ATLAS Fast Tracker SO 2012 18TH IEEE-NPSS REAL TIME CONFERENCE (RT) LA English DT Proceedings Paper CT 18th IEEE-NPSS Real Time Conference (RT) CY JUN 09-15, 2012 CL Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab), Berkeley, CA SP IEEE, Nucl & Plasma Sci Soc, Univ Calif HO Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab) AB The Fast TracKer (FTK) is an upgrade to the ATLAS level-2 trigger. The FTK system will reconstruct tracks using data from the inner Pixel and SCT silicon detector modules at trigger rates up to 100 kHz. We present an overview of the Data Formatter system, which is designed to remap, share and reformat the Pixel and SCT module data to match the geometry of the FTK trigger towers. C1 [Olsen, Jamieson; Liu, Ted; Penning, Bjoern] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. [Li, Ho Ling; Okumura, Yasuyuki] Univ Chicago, Dept Phys, Chicago, IL 60601 USA. RP Olsen, J (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM jamieson@fual.gov; hlli@uchicago.edu; thliu@fnal.gov; yasuyuki.okumura@cern.ch; penning@fnal.gov NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1082-6; 978-1-4673-1083-3 PY 2012 PG 4 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEH30 UT WOS:000316572100100 ER PT J AU Purschke, ML AF Purschke, Martin L. CA PHENIX Collaboration GP IEEE TI Readout of GEM Stacks with the CERN SRS System SO 2012 18TH IEEE-NPSS REAL TIME CONFERENCE (RT) LA English DT Proceedings Paper CT 18th IEEE-NPSS Real Time Conference (RT) CY JUN 09-15, 2012 CL Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab), Berkeley, CA SP IEEE, Nucl and Plasma Sci Soc (NPSS), Univ Calif HO Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab) ID CHIP AB The PHENIX Collaboration at the Relativistic Heavy ion Collider (RHIC) is considering a Gas-Electron Multiplier (GEM) tracker as part of a major upgrade of the PHENIX apparatus. The CERN RD51 collaboration has developed a "Scalable Readout System" (SRS) to facilitate a standard readout system which is suitable for GEM stacks. For the tests we are currently conducting, we have implemented the readout of the SRS into our bench-top DAQ system, "RCDAQ". In addition to showing some early data from our GEM test detector, we will introduce the concepts behind RCDAQ, show the implementation of the SRS, and highlight the main features of the system. C1 [Purschke, Martin L.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Purschke, ML (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1082-6 PY 2012 PG 3 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEH30 UT WOS:000316572100074 ER PT B AU Rivera, RA Prosser, A Uplegger, L Andresen, J Kwan, S AF Rivera, Ryan A. Prosser, Alan Uplegger, Lorenzo Andresen, Jeff Kwan, Simon GP IEEE TI An Application Using MicroTCA for Real-Time Event Assembly SO 2012 18TH IEEE-NPSS REAL TIME CONFERENCE (RT) LA English DT Proceedings Paper CT 18th IEEE-NPSS Real Time Conference (RT) CY JUN 09-15, 2012 CL Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab), Berkeley, CA SP IEEE, Nucl & Plasma Sci Soc, Univ Calif HO Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab) AB The Electronic Systems Engineering Department of the Computing Sector at the Fermi National Accelerator Laboratory has undertaken the effort of designing an AMC that meets the specifications within the MicroTCA framework. The application chosen to demonstrate the hardware is the real-time event assembly of data taken by a particle tracking pixel telescope. In the past, the telescope would push all of its data to a PC where the data was stored to disk. Then event assembly, geometry inference, and particle tracking were all done at a later time. This approach made it difficult to efficiently assess the quality of the data as it was being taken - at times, resulting in wasted test beam time. Now, we can insert in the data path, between the telescope and the PC, a commercial MicroTCA crate housing our AMC. The AMC receives, buffers, and processes the data from the tracking telescope and transmits complete, assembled events to the PC in real-time. In this paper, we report on the design approach and the results achieved when the MicroTCA hardware was employed for the first time during a test beam run at the Fermi Test Beam Facility in 2012. C1 [Rivera, Ryan A.; Prosser, Alan; Uplegger, Lorenzo; Andresen, Jeff; Kwan, Simon] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. RP Rivera, RA (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM rrivera@fnal.gov FU Fermi National Accelerator Laboratory [DE-AC02-07CH11359]; United States Department of Energy FX This work was supported by Fermi National Accelerator Laboratory operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy. NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1082-6; 978-1-4673-1083-3 PY 2012 PG 4 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEH30 UT WOS:000316572100135 ER PT B AU Schambach, J Greiner, L Stezelberger, T Sun, X Szelezniak, M Vu, C AF Schambach, J. Greiner, L. Stezelberger, T. Sun, X. Szelezniak, M. Vu, C. GP IEEE TI Readout Hardware and Firmware Architecture of the HFT PXL Detector at STAR SO 2012 18TH IEEE-NPSS REAL TIME CONFERENCE (RT) LA English DT Proceedings Paper CT 18th IEEE-NPSS Real Time Conference (RT) CY JUN 09-15, 2012 CL Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab), Berkeley, CA SP IEEE, Nucl & Plasma Sci Soc, Univ Calif HO Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab) ID CHARGED-PARTICLE TRACKING; SENSORS AB The "Heavy Flavor Tracker" (HFT) is an approved micro-vertex detector upgrade to the STAR experiment at RHIC, consisting of three subsystems with various technologies of silicon sensors arranged in 4 concentric cylinders, to be installed in STAR by 2014. This new vertex detector will improve the track-pointing resolution in STAR to a DCA of similar to 30 mu m in order to allow for a direct and full topological reconstruction of heavy quark meson decays and a better determination of the heavy quark meson spectra. The two innermost layers of the HFT close to the beam pipe, the Pixel ("PXL") subsystem, employ CMOS monolithic active pixel sensor (MAPS) technology that integrates the sensor, front-end electronics, and zero-suppression circuitry in one silicon wafer. The PXL layers of the HFT will consist of 400 MAPS sensors arranged in 40 ladders (10 ladders at a radius of 2.5cm and 30 ladders at 8cm from the beam), each containing 10 of these sensors. This paper will present selected design characteristics of the PXL detector part of the HFT and the hardware and firmware architecture of the proposed readout system for this detector, as well as its integration into the existing STAR framework. A prototype of this readout system has recently been used at CERN to take data from a telescope consisting of 7 sensors arranged in parallel planes and shown to be fully functional. C1 [Schambach, J.] Univ Texas Austin, Austin, TX 78712 USA. [Greiner, L.; Stezelberger, T.; Sun, X.; Vu, C.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Szelezniak, M.] Lawrence Berkeley Natl Lab, Inst Pluridiscplinaire Hubert Curien IPHC, Strasbourg, France. RP Schambach, J (reprint author), Univ Texas Austin, Austin, TX 78712 USA. EM jschamba@physics.utexas.edu FU US DoE Office of Nuclear Physics [DE-FG02-94ER40845, DE-AC0205CH11231] FX This work was supported in part by US DoE Office of Nuclear Physics grants DE-FG02-94ER40845 and DE-AC0205CH11231. NR 9 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1082-6; 978-1-4673-1083-3 PY 2012 PG 5 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEH30 UT WOS:000316572100078 ER PT B AU Underwood, DG Drake, G Fernando, WS Stanek, RW AF Underwood, D. G. Drake, G. Fernando, W. S. Stanek, R. W. GP IEEE TI Modulator-Based, High Bandwidth Optical Links for HEP Experiments SO 2012 18TH IEEE-NPSS REAL TIME CONFERENCE (RT) LA English DT Proceedings Paper CT 18th IEEE-NPSS Real Time Conference (RT) CY JUN 09-15, 2012 CL Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab), Berkeley, CA SP IEEE, Nucl & Plasma Sci Soc, Univ Calif HO Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab) AB As a concern with the reliability, bandwidth and mass of future optical links in LHC experiments, we are investigating CW lasers and light modulators as an alternative to VCSELs. These links will be particularly useful if they utilize light modulators which are very small, low power, high bandwidth, and are very radiation hard. We have constructed a test system with 3 such links, each operating at 10 Gb/s. We present the quality of these links (jitter, rise and fall time, BER) and eye mask margins (10GbE) for 3 different types of modulators: LiNbO3-based, InP-based, and Si-based. We present the results of radiation hardness measurements with up to similar to 10(12) protons/cm(2) and similar to 65 krad total ionizing dose (TID), confirming no single event effects (SEE) at 10 Gb/s with either of the 3 types of modulators. These optical links will be an integral part of intelligent tracking systems at various scales from coupled sensors through intra-module and off detector communication. We have used a Si-based photonic transceiver to build a complete 40 Gb/s bi-directional link (10 Gb/s in each of four fibers) for a 100m run and have characterized it to compare with standard VCSEL-based optical links. Some future developments of optical modulator-based high bandwidth optical readout systems, and applications based on both fiber and free space data links, such as local triggering and data readout and trigger-clock distribution, are also discussed. C1 [Underwood, D. G.; Drake, G.; Fernando, W. S.] Argonne Natl Lab, High Energy Phys, 9700 S Cass Ave, Argonne, IL 60439 USA. RP Underwood, DG (reprint author), Argonne Natl Lab, High Energy Phys, 9700 S Cass Ave, Argonne, IL 60439 USA. EM dgu@hep.anl.gov FU U. S. Department of Energy Office of Science laboratory [DE- AC0206CH11357] FX The submitted manuscript has been created by UChicago Argonne, LLC, Operator of Argonne National Laboratory (" Argonne"). Argonne, a U. S. Department of Energy Office of Science laboratory, is operated under Contract No. DE- AC0206CH11357. The U. S. Government retains for itself, and others acting on its behalf, a paid- up nonexclusive, irrevocable worldwide license in said article to reproduce, prepare derivative works, distribute copies to the public, and perform publicly and display publicly, by or on behalf of the Government. NR 12 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1082-6; 978-1-4673-1083-3 PY 2012 PG 5 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEH30 UT WOS:000316572100113 ER PT B AU Visser, GJ Anderson, JT Buck, B Kreps, AS Ljubicic, T AF Visser, G. J. Anderson, J. T. Buck, B. Kreps, A. S. Ljubicic, T. GP IEEE TI A Readout System Utilizing the APV25 ASIC for the Forward GEM Tracker in STAR SO 2012 18TH IEEE-NPSS REAL TIME CONFERENCE (RT) LA English DT Proceedings Paper CT 18th IEEE-NPSS Real Time Conference (RT) CY JUN 09-15, 2012 CL Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab), Berkeley, CA SP IEEE, Nucl & Plasma Sci Soc, Univ Calif HO Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab) AB We have developed a modular readout system for the 30,720 channel Forward GEM Tracker recently installed in the STAR Experiment at RHIC, BNL. The modular architecture is based on a passive compact PCI backplane running a custom protocol, not PCI, connecting 6 readout modules to a readout controller module. The readout modules provide all necessary functions, including isolated power supplies, to operate up to 24 APV25 chips per module with high-impedance ground isolation. The front-end boards contain a minimal set of components as they are located inside the STAR TPC inner field cage and are inaccessible except during long shutdown periods. The front-end boards connect to the readout modules with cables up to 24 m in length, carrying unbuffered analog readout signals from the APV25 as well as power, trigger, clock and control. The readout module digitizes the APV analog samples to 12 bits at 37.532 MHz, and zero suppresses and buffers the data. The readout controller distributes trigger and clock from the central trigger system, gathers the data over the backplane, and ships it to a linux PC via a 2.125 Gbps optical data link (Detector Data Link (DDL) from ALICE). The PC gathers data from multiple readout controllers and dispatches it to the STAR event builders. The readout modules, controllers, and backplanes are housed in a common crate together with the GEM HV bias power supplies. C1 [Visser, G. J.] Indiana Univ, Bloomington, IN 47408 USA. [Anderson, J. T.; Kreps, A. S.] Argonne Natl Lab, Argonne, IL 60439 USA. [Buck, B.] MIT, Middleton, MA 01949 USA. [Ljubicic, T.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Visser, GJ (reprint author), Indiana Univ, Bloomington, IN 47408 USA. EM gvisser@indiana.edu FU Offices of Nuclear Physics and High Energy Physics within the U.S. Department of Energy Office of Science; U.S. National Science Foundation FX This work was supported in part by the Offices of Nuclear Physics and High Energy Physics within the U.S. Department of Energy Office of Science, and by the U.S. National Science Foundation. NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1082-6; 978-1-4673-1083-3 PY 2012 PG 6 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEH30 UT WOS:000316572100063 ER PT B AU Wu, JY Shiu, SH AF Wu, Jinyuan Shiu, Shiuan-Hal GP IEEE TI Field-Programmable Gate Array (FPGA) Firmware for the Fermilab E906 (SeaQuest) Trigger SO 2012 18TH IEEE-NPSS REAL TIME CONFERENCE (RT) LA English DT Proceedings Paper CT 18th IEEE-NPSS Real Time Conference (RT) CY JUN 09-15, 2012 CL Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab), Berkeley, CA SP IEEE, Nucl & Plasma Sci Soc, Univ Calif HO Univ Calif, U S Dept Energy, Lawrence Berkeley Natl Lab (Berkelly Lab) DE Front End Electronics; TDC; Trigger; FPGA Firmware AB Scintillating hodoscopes trigger firmware in a field-programmable gate array (FPGA) was implemented in a commercially-off-the-shelf 6U VMEbus module for the Fermilab E906 (SeaQuest) experiment. The FPGA receives up to 96-channel inputs and digitizes the leading edge time at 1 ns (LSB) resolution using time-to-digital converter (TDC) blocks in the firmware. Digital processes on the outputs of the TDC include adjusting delay channel-by-channel in 1-ns steps, setting coincidence range and re-align with the accelerator bucket clock. The re-aligned hits are further processed in trigger matrices. E906 uses four scintillating hodoscopes and various 3-out-of-4 (or 4-out-of-4) majority coincidence logic is used to generate valid track information as trigger primitives to form a final global trigger. Zero-suppressed TDC data are read out for each event and thus the module could be used as a 96-channel TDC beyond the functionality if trigger matrices. C1 [Wu, Jinyuan] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. [Shiu, Shiuan-Hal] Acad Sinica, Inst Phys, Taipei, Taiwan. RP Wu, JY (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM jywu168@fnal.gov FU Fermi Research Alliance, LLC with the United States Department of Energy FX This work was supported in part by Fermi Research Alliance, LLC under Contract No. DE- AC02- 07CH11359 with the United States Department of Energy. NR 8 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1082-6; 978-1-4673-1083-3 PY 2012 PG 4 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEH30 UT WOS:000316572100086 ER PT S AU Chow, WW AF Chow, W. W. GP IEEE TI Theory of laser gain in a Ge-on-Si laser SO 2012 23RD IEEE INTERNATIONAL SEMICONDUCTOR LASER CONFERENCE (ISLC) SE IEEE International Semiconductor Laser Conference LA English DT Proceedings Paper CT 23rd IEEE International Semiconductor Laser Conference (ISLC) CY OCT 07-10, 2012 CL San Diego, CA SP IEEE AB A theory is developed for the gain versus injected current density under different tensile strains and doping densities. Many-body effects are included to account for energy renormalization modifications to the impact of n-doping. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Chow, WW (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM wwchow@sandia.gov NR 3 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2326-5442 BN 978-1-4577-0828-2 J9 IEEE INT SEMICONDUCT PY 2012 BP 12 EP 13 PG 2 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BEJ09 UT WOS:000316820100007 ER PT S AU Frolik, J Lentine, AL Seier, A Palombini, C AF Frolik, J. Lentine, A. L. Seier, A. Palombini, C. GP IEEE TI Dynamic Communications Control for mu Grid Agents SO 2012 3RD IEEE PES INNOVATIVE SMART GRID TECHNOLOGIES EUROPE (ISGT EUROPE) SE IEEE PES Innovative Smart Grid Technologies Conference Europe LA English DT Proceedings Paper CT 3rd IEEE PES International Conference and Exhibition on Innovative Smart Grid Technologies Europe (ISGT Europe) CY OCT 14-17, 2012 CL Tech Univ Berlin, Berlin, GERMANY SP IEEE PES Power & Energy Soc, Tech Univ Berlin, SENSE Lab, IEEE HO Tech Univ Berlin DE smart grid communications; microgrid AB In this work, we present a robust communication control strategy for source, load and storage agents in a microgrid. In particular, the work is motivated by low inertia microgrid environments having high penetration of stochastic renewable resources and thus ones where high data rate communications is requisite to maintain power system stability. The proposed multi-state automaton-based approach, that assigns communication priorities in relation to an agents's power impact on the microgrid, is shown to satisfy bandwidth requirements that are several orders of magnitude higher than that of today's Smart Grid. C1 [Frolik, J.; Seier, A.; Palombini, C.] Univ Vermont, Sch Engn, Burlington, VT 05405 USA. [Lentine, A. L.] Tech Staff, Sandia Natl Lab, Albuquerque, NM USA. RP Frolik, J (reprint author), Univ Vermont, Sch Engn, Burlington, VT 05405 USA. EM jfrolik@uvm.edu FU Department of Energy's Office of Electricity Delivery and Energy Reliability, by Sandia's Laboratory Directed Research and Development ( LDRD) program; University of Vermont. Sandia National Laboratories is a multi- program laboratory; U.S. Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000] FX The authors wish to acknowledge discussions with S. Goldsmith about the agent architecture. This work was supported in part by an Electric Power Fellowship grant from the Department of Energy's Office of Electricity Delivery and Energy Reliability, by Sandia's Laboratory Directed Research and Development ( LDRD) program, and by the University of Vermont. Sandia National Laboratories is a multi- program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. NR 18 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2165-4816 BN 978-1-4673-2595-0; 978-1-4673-2596-7 J9 IEEE PES INNOV SMART PY 2012 PG 5 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEH23 UT WOS:000316564100008 ER PT S AU Mancilla-David, F Arancibia, A Riganti-Fulginei, F Muljadi, E Cerroni, M AF Mancilla-David, F. Arancibia, A. Riganti-Fulginei, F. Muljadi, E. Cerroni, M. GP IEEE TI A Maximum Power Point Tracker Variable-DC-Link Three-Phase Inverter for Grid-Connected PV Panels SO 2012 3RD IEEE PES INNOVATIVE SMART GRID TECHNOLOGIES EUROPE (ISGT EUROPE) SE IEEE PES Innovative Smart Grid Technologies Conference Europe LA English DT Proceedings Paper CT 3rd IEEE PES International Conference and Exhibition on Innovative Smart Grid Technologies Europe (ISGT Europe) CY OCT 14-17, 2012 CL Tech Univ Berlin, Berlin, GERMANY SP IEEE PES Power & Energy Soc, Tech Univ Berlin, SENSE Lab, IEEE HO Tech Univ Berlin DE Photovoltaic Array; Maximum Power Point Tracking; Incremental Conductance; Three-Phase Inverter; VSC Control ID VOLTAGE AB This paper introduces a variable dc-link control scheme of a grid-connected three-phase inverter for photovoltaic power plants with maximum power point tracking capability. The control scheme includes two layers. An inner current control loop injects power with an adjustable power factor into the ac grid. An outer control loop introduces small changes in the dc-link voltage based on a modified version of the well known incremental conductance algorithm in order to track the point of maximum power in the photovoltaic array. A chief advantage of the proposed scheme is the elimination of the intermediate dc/dc converter stage usually included to realize the maximum power point tracking function. The control scheme is validated in a 425kW system using real irradiance data provided by the U.S. Department of Energy's National Renewable Energy Laboratory through a detailed computer simulation in the PSCAD/EMTDC mathematical software package. C1 [Mancilla-David, F.; Arancibia, A.; Riganti-Fulginei, F.; Cerroni, M.] Univ Colorado Denver, Denver, CO 80204 USA. [Muljadi, E.] Natl Renewable Energy Lab, Dept Energys, Golden, CO 80401 USA. RP Mancilla-David, F (reprint author), Univ Colorado Denver, Denver, CO 80204 USA. NR 18 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2165-4816 BN 978-1-4673-2595-0; 978-1-4673-2596-7 J9 IEEE PES INNOV SMART PY 2012 PG 7 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEH23 UT WOS:000316564100288 ER PT J AU Barrett, RF Dosanjh, SS Heroux, MA Hu, XS Parker, S Shalf, J AF Barrett, Richard F. Dosanjh, Sudip S. Heroux, Michael A. Hu, X. S. Parker, S. Shalf, J. GP IEEE TI Toward Codesign in High Performance Computing Systems SO 2012 IEEE/ACM INTERNATIONAL CONFERENCE ON COMPUTER-AIDED DESIGN (ICCAD) LA English DT Proceedings Paper CT IEEE/ACM International Conference on Computer-Aided Design (ICCAD) CY NOV 05-08, 2012 CL San Jose, CA SP IEEE, Assoc Comp Machinery (ACM), IEEE Council Elect Design Automat (CEDA), Assoc Comp Machinery (ACM), Special Interest Grp Design Automat (SIGDA), IEEE Electron Devices Soc (EDS), SSCS DE hardware/software codesign; scientific applications; high performance computing; parallel architectures AB Preparations for exascale computing have led to the realization that computing environments will be significantly different from those that provide petascale capabilities. This change is driven by energy constraints, which has compelled hardware architects to design systems that will require a significant re-thinking of how application algorithms are selected and implemented. The "codesign" principle may offer a common basis for application and system developers as well as architects to work synergistically towards achieving exascale computing. This paper aims to introduce to the embedded system design community the unique challenges and opportunities as well as exciting developments in exascale HPC system codesign. Given the success of adopting codesign practices in the embedded system design area, this effort should be mutually beneficial to both communities. C1 [Barrett, Richard F.; Dosanjh, Sudip S.; Heroux, Michael A.] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. [Hu, X. S.] Univ Notre Dame, Notre Dame, IN USA. [Parker, S.] Nvidia Inc, Santa Clara, CA USA. [Shalf, J.] Lawrence Berkeley Natl Lab, Berkeley, CA USA. RP Barrett, RF (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM rfbarre@sandia.gov; ssdosan@sandia.gov; maherou@sandia.gov; shu@nd.edu; sparker@nvidia.com; JShalf@lbl.gov OI Heroux, Michael/0000-0002-5893-0273 FU US Department of Energy Os Office of Advanced Scientific Computing Research; DoE Office of Advanced Scientific Computing Research [DE-AC02-05CH11231]; U.S. Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000]; Sandia National Laboratories FX The work described in this article was supported by the US Department of Energy Os Office of Advanced Scientific Computing Research. Lawrence Berkeley National Laboratory is supported by the DoE Office of Advanced Scientific Computing Research under contract DE-AC02-05CH11231. Sandia National Laboratories is a multi- program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. X. Sharon Hu would like to acknowledge the support from Sandia National Laboratories for this work. NR 15 TC 0 Z9 0 U1 0 U2 6 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4503-1573-9 PY 2012 BP 443 EP 449 PG 7 WC Computer Science, Software Engineering; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEJ79 UT WOS:000317001300069 ER PT S AU Imam, N Barhen, J Glover, C AF Imam, Neena Barhen, Jacob Glover, Charles GP IEEE TI Optimum Sensors Integration for Multi-Sensor Multi-Target Environment for Ballistic Missile Defense Applications SO 2012 IEEE INTERNATIONAL SYSTEMS CONFERENCE (SYSCON) SE Annual IEEE Systems Conference LA English DT Proceedings Paper CT 6th IEEE International Systems Conference (SYS CON) CY MAR 19-22, 2012 CL Vancouver, CANADA SP IEEE, IEEE Syst Council, INCOSE, IEEE Vancouver Sect DE sensor resource managment; information theory; state and covariance; dynamic programming; multi-target; multi-sensor ID MANAGEMENT; TRACKING; RADAR AB Multi-sensor networks may face resource limitations in a dynamically evolving multiple target tracking scenario. It is necessary to task the sensors efficiently so that the overall system performance is maximized within the system constraints. The central sensor resource manager may control the sensors to meet objective functions that are formulated to meet system goals such as minimization of track loss, maximization of probability of target detection, and minimization of track error. This paper discusses the variety of techniques that may be utilized to optimize sensor performance for either near term gain or future reward over a longer time horizon. C1 [Imam, Neena; Barhen, Jacob; Glover, Charles] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Imam, N (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM imamn@ornl.gov; barhenj@ornl.gov; glovercw@ornl.gov NR 16 TC 0 Z9 0 U1 1 U2 6 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1944-7620 BN 978-1-4673-0749-9 J9 ANN IEEE SYST CONF PY 2012 BP 256 EP 259 PG 4 WC Engineering, Industrial; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA BEK23 UT WOS:000317054300044 ER PT S AU Ambuken, P Stretz, H Koo, JH Lee, J Trejo, R AF Ambuken, Preejith Stretz, Holly Koo, Joseph H. Lee, Jason Trejo, Rosa BE Morgan, AB Wilkie, CA Nelson, GL TI High-Temperature Flammability and Mechanical Properties of Thermoplastic Polyurethane Nanocomposites SO FIRE AND POLYMERS VI: NEW ADVANCES IN FLAME RETARDANT CHEMISTRY AND SCIENCE SE ACS Symposium Series LA English DT Proceedings Paper CT 6th Fire and Polymers Symposium CY MAR 25-29, 2012 CL San Diego, CA SP ACS, Div Polym Mat Sci & Engn AB Incorporation of nanoparticles into a polymer can result in enhancement of electrical, thermal and mechanical properties, particularly at high temperatures where the polymer alone might exhibit softening or degradation. The nanocomposite softening temperature may or may not coincide with the temperature at which the nanoparticle enhances char formation. This work describes the modulus enhancement of thermoplastic polyurethane (TPU) nanocomposites at high temperature (up to 300 C) using dynamic mechanical analysis (DMA). Different compositions of TPU nanocomposites were prepared on a commercial scale twin-screw extruder using a montmorillonite organo-clay, carbon nanofibers and multiwall carbon nanotubes (MWNT). The onset of softening was found to increase with nanoparticle loading (tested at 1 Hz). Overall MWNT were found to produce the optimal reinforcement response in the char for TPU-based nanocomposites heated to 300 degrees C. A gap in reinforcement was noted at certain temperatures as the samples developed char. A correlation can be drawn between crossover of dissipative versus elastic behavior (dominance of loss modulus versus storage modulus) and dripping in UL 94 tests. C1 [Ambuken, Preejith; Stretz, Holly] Tennessee Technol Univ, Dept Chem Engn, Cookeville, TN 38505 USA. [Koo, Joseph H.] Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA. [Lee, Jason] MIT, Dept Chem Engn, Cambridge, MA 02139 USA. [Trejo, Rosa] Oak Ridge Natl Lab, High Temp Mat Lab, Oak Ridge, TN 37831 USA. RP Ambuken, P (reprint author), Tennessee Technol Univ, Dept Chem Engn, Cookeville, TN 38505 USA. EM hstretz@tntech.edu NR 12 TC 3 Z9 3 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 978-0-8412-2780-4 J9 ACS SYM SER JI ACS Symp. Ser. PY 2012 VL 1118 BP 343 EP + PG 3 WC Polymer Science SC Polymer Science GA BEC72 UT WOS:000316088700023 ER PT B AU Lovekin, CC Guzik, JA AF Lovekin, C. C. Guzik, J. A. BE Drissen, L Robert, C StLouis, N Moffat, AFJ TI Pulsational Mass Loss in Luminous Blue Variables SO FOUR DECADES OF RESEARCH ON MASSIVE STARS SE Astronomical Society of the Pacific Conference Series LA English DT Proceedings Paper CT Meeting on 4 Decades of Research on Massive Stars in Honor of Anthony FJ Moffat CY JUL 11-15, 2011 CL Auberge Lac Taureau, St Michel des St, CANADA HO Auberge Lac Taureau AB Luminous Blue Variables are evolved stars which experience periods of enhanced mass loss and outbursts. During these outbursts, the star stays at constant luminosity, but appears to become cooler. The S Doradus type variability, unlike the more extreme eruptions seen in eta Car, occur on timescales of years to decades. The origin of the variability is still not understood, nor is the connection to extreme objects such as eta Car. In this work, we examine hydrodynamic models of radial pulsation including time-dependent convection in massive stars, looking for the conditions necessary to trigger S Doradus type variability. C1 [Lovekin, C. C.; Guzik, J. A.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Lovekin, CC (reprint author), Los Alamos Natl Lab, POB 1663,T-2,MS-B283, Los Alamos, NM 87545 USA. EM clovekin@lanl.gov NR 6 TC 0 Z9 0 U1 0 U2 1 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA BN 978-1-58381-812-1 J9 ASTR SOC P PY 2012 VL 465 BP 25 EP 27 PG 3 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BEI58 UT WOS:000316716000004 ER PT B AU Lovekin, CC AF Lovekin, C. C. BE Drissen, L Robert, C StLouis, N Moffat, AFJ TI Mass Loss in 2-D Stellar Models SO FOUR DECADES OF RESEARCH ON MASSIVE STARS SE Astronomical Society of the Pacific Conference Series LA English DT Proceedings Paper CT Meeting on 4 Decades of Research on Massive Stars in Honor of Anthony FJ Moffat CY JUL 11-15, 2011 CL Auberge Lac Taureau, St Michel des St, CANADA HO Auberge Lac Taureau ID ARBITRARY ROTATION LAWS; EVOLUTION; STARS AB A large number of massive stars are known to rotate, resulting in significant distortion and variation in surface temperature from the pole to the equator. Radiatively driven mass loss is temperature dependent, so rapid rotation produces variation in mass loss and angular momentum loss rates across the surface of the star, which is expected to affect the evolution of rapidly rotating massive stars. In this work, we investigate the two dimensional effects of rotation on radiatively driven mass loss and the associated loss of angular momentum in ZAMS models with solar metallicity. Using 2-D stellar models, which give the variation in surface parameters as a function of co-latitude, we implement two different mass-loss prescriptions describing radiatively driven mass loss. We find a significant variation in mass-loss rates and angular momentum loss as a function of co-latitude. We find that the mass-loss rate decreases as the rotation rate increases for models at constant initial mass and derive scaling relations based on these models. When comparing 2-D to 1-D mass-loss rates, we find that although the total angle integrated mass loss does not differ significantly, the 2-D models predict less mass loss from the equator and more mass loss from the pole than the 1-D predictions using von Zeipel's law. As a result, rotating models lose less angular momentum in 2-D than in 1-D, which will change the subsequent evolution of the star. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Lovekin, CC (reprint author), Los Alamos Natl Lab, POB 1663,T-2,MS-B283, Los Alamos, NM 87545 USA. EM clovekin@lanl.gov NR 8 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA BN 978-1-58381-812-1 J9 ASTR SOC P PY 2012 VL 465 BP 74 EP 79 PG 6 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA BEI58 UT WOS:000316716000012 ER PT S AU Yang, X Wheeler, DA Gu, C Zhang, JZ AF Yang, Xuan Wheeler, Damon A. Gu, Claire Zhang, Jin Z. BE Hepel, M Zhong, CJ TI Molecular Sensing Based on Surface-Enhanced Raman Scattering and Optical Fibers SO FUNCTIONAL NANOPARTICLES FOR BIOANALYSIS, NANOMEDICINE, AND BIOELECTRONIC DEVICES, VOL 2 SE ACS Symposium Series LA English DT Article; Book Chapter ID PHOTONIC CRYSTAL FIBER; FLUORESCENCE SPECTROSCOPY; SENSITIVE DETECTION; PROBES; PROTEINS; SENSORS; CORE; TIPS; AIR AB Molecular sensors based on surface-enhanced Raman scattering (SERS) and optical fibers have been widely used in chemical and biological detections due to their unique advantages: molecular specificity, high sensitivity, flexibility, and in-situ remote sensing capability. In this chapter, we review the development of fiber biosensors based on SERS and highlight several important milestones. Various fiber SERS configurations will be discussed with an emphasis on our recent techniques known as the double substrate "sandwich" structure and the liquid core photonic crystal fiber. They are based on a stronger electromagnetic field enhancement and/or increased SERS interaction volume. These fiber sensors were tested with dye molecules, proteins, and bacteria and showed extremely high sensitivity. C1 [Yang, Xuan; Gu, Claire] Univ Calif Santa Cruz, Dept Elect Engn, Santa Cruz, CA 95064 USA. [Wheeler, Damon A.; Zhang, Jin Z.] Univ Calif Santa Cruz, Dept Chem & Biochem, Santa Cruz, CA 95064 USA. [Yang, Xuan] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Yang, X (reprint author), Univ Calif Santa Cruz, Dept Elect Engn, Santa Cruz, CA 95064 USA. EM zhang@ucsc.edu NR 40 TC 0 Z9 0 U1 0 U2 12 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 978-0-8412-2775-0 J9 ACS SYM SER JI ACS Symp. Ser. PY 2012 VL 1113 BP 273 EP 285 PG 13 WC Chemistry, Physical; Engineering, Biomedical; Nanoscience & Nanotechnology SC Chemistry; Engineering; Science & Technology - Other Topics GA BEK97 UT WOS:000317146600012 ER PT S AU Kotava, N Knoll, A Schott, M Garth, C Tricoche, X Kessler, C Cohen, E Hansen, CD Papka, ME Hagen, H AF Kotava, Natallia Knoll, Aaron Schott, Mathias Garth, Christoph Tricoche, Xavier Kessler, Christoph Cohen, Elaine Hansen, Charles D. Papka, Michael E. Hagen, Hans BE Hauser, H Kobourov, S Qu, H TI Volume Rendering with Multidimensional Peak Finding SO IEEE PACIFIC VISUALIZATION SYMPOSIUM 2012 SE IEEE Pacific Visualization Symposium LA English DT Proceedings Paper CT 5th IEEE Pacific Visualization Symposium CY FEB 28-MAR 02, 2012 CL Songdo, SOUTH KOREA SP IEEE, IEEE Comp Soc, IEEE Comp Soc Visualizat & Graph Tech Comm (VGTC) DE volume rendering; multidimensional transfer functions; peak finding ID VISUALIZATION AB Peak finding provides more accurate classification for direct volume rendering by sampling directly at local maxima in a transfer function, allowing for better reproduction of high-frequency features. However, the 1D peak finding technique does not extend to higher-dimensional classification. In this work, we develop a new method for peak finding with multidimensional transfer functions, which looks for peaks along the image of the ray. We use piecewise approximations to dynamically sample in transfer function space between world-space samples. As with unidimensional peak finding, this approach is useful for specifying transfer functions with greater precision, and for accurately rendering noisy volume data at lower sampling rates. Multidimensional peak finding produces comparable image quality with order-of-magnitude better performance, and can reproduce features omitted entirely by standard classification. With no precomputation or storage requirements, it is an attractive alternative to preintegration for multidimensional transfer functions. C1 [Kotava, Natallia; Garth, Christoph; Kessler, Christoph; Hagen, Hans] Univ Kaiserslautern, D-67663 Kaiserslautern, Germany. [Schott, Mathias; Cohen, Elaine; Hansen, Charles D.] Univ Utah, Salt Lake City, UT 84112 USA. [Knoll, Aaron; Papka, Michael E.] Argonne Natl Lab, Argonne, IL 60439 USA. [Tricoche, Xavier] Purdue Univ, W Lafayette, IN 47907 USA. RP Kotava, N (reprint author), Univ Kaiserslautern, D-67663 Kaiserslautern, Germany. EM kotava@rhrk.uni-kl.de FU International Research Training Group at the University of Kaiserslautern; Computational Postdoctoral Fellowship at Argonne National Laboratory under the American Reinvestment and Recovery Act FX This work was supported by the International Research Training Group at the University of Kaiserslautern and the Computational Postdoctoral Fellowship at Argonne National Laboratory under the American Reinvestment and Recovery Act. We thank RickWagner at the San Diego Supercomputing Center for the Enzo data, Jacqueline Chen at Sandia National Laboratory for the combustion data, and Tolga Tasdizen at the University of Utah for the zebrafish data. NR 30 TC 2 Z9 2 U1 0 U2 0 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA SN 2165-8765 BN 978-1-4673-0864-9 J9 IEEE PAC VIS SYMP PY 2012 BP 161 EP 168 PG 8 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BEH68 UT WOS:000316628200021 ER PT S AU Shet, S AF Shet, S. BE Mantz, RA Suroviec, A TI Bandgap Narrowing of Zinc Oxide (ZnO) by Nitrogen Incorporation for Solar Driven Hydrogen Production SO PHYSICAL AND ANALYTICAL ELECTROCHEMISTRY (GENERAL SESSION) - 220TH ECS MEETING SE ECS Transactions LA English DT Proceedings Paper CT Symposium on Physical and Analytical Electrochemistry General Session held during the 220th Meeting of the Electrochemical-Society (ECS) CY OCT 09-14, 2011 CL Boston, MA SP Electrochem Soc (ECS), Phys and Analyt Electrochemistry ID P-TYPE ZNO; THIN-FILMS; SUBSTRATE-TEMPERATURE; OPTICAL-PROPERTIES; ALIGNED NANORODS; ZNO(AL,N) FILMS; DOPED ZNO; ELECTRODES; PHOTOCATALYSIS; CELLS AB In this study, report on the synthesis of ZnO:N thin films by reactive RF magnetron sputtering using a Zn metal target & ZnO target in mixed N-2 and O-2 ambient. We found that the N concentration in ZnO:N thin films can be effectively controlled by varying the RF power. ZnO:N films with narrowed bandgaps were synthesized. The photoelectrochemical properties of nitrogen-incorporated ZnO (ZnO:N) films were measured and compared with those of pure ZnO films. We find that nitrogen incorporation narrows the bandgap of ZnO and shifts the optical absorption into the visible-light regions. We further find that the ZnO:N films provide considerable photoresponse in the long-wavelength regions. As a result, the ZnO:N films exhibit higher photocurrents than pure ZnO films. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Shet, S (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 21 TC 0 Z9 0 U1 5 U2 16 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA SN 1938-5862 BN 978-1-60768-326-1 J9 ECS TRANSACTIONS PY 2012 VL 41 IS 27 BP 39 EP 48 DI 10.1149/1.3692522 PG 10 WC Electrochemistry SC Electrochemistry GA BEJ31 UT WOS:000316864800006 ER PT B AU Williams, LY Krause, J AF Williams, Lynne Y. Krause, Jackie BE Neal, DR TI Pragmatics of Twitter use for academics: tweeting in and out of the classroom SO SOCIAL MEDIA FOR ACADEMICS: A PRACTICAL GUIDE SE Chandos Publishing Social Media Series LA English DT Article; Book Chapter DE social networking; Twitter; online identity; personal branding AB Twitter evolved from blogs and is a hybrid between blogging and instant messaging. While blogging is typically a desktop computer activity, Twitter is deliberately designed for easy use with a hand-held device, such as a smartphone. Twitter caters to the mobile blogger by requiring them to keep their posts down to a maximum of 140 characters, which is referred to as microblogging or tweeting. The resulting tweets have an air of immediacy, of what the tweeter is doing in the moment. Tweeters can follow other tweeters with similar interests, and the immediate nature of tweets gives a sense of knowing the tweeter being followed. C1 [Williams, Lynne Y.] Univ New Mexico, Los Alamos Natl Lab, Los Alamos, NM USA. [Williams, Lynne Y.] Univ New Mexico, Title Grant Programme 5, Los Alamos, NM USA. [Williams, Lynne Y.] Northern New Mexico Community Coll, Mexico City, DF, Mexico. [Williams, Lynne Y.] Santa Fe Community Coll, Gainesville, FL USA. [Williams, Lynne Y.] Univ New Mexico, Los Alamos, NM USA. [Krause, Jackie] Kaplan Univ, Sch Informat Syst & Technol, Mason, IA USA. RP Williams, LY (reprint author), Kaplan Univ, Mason, IA USA. NR 30 TC 1 Z9 1 U1 3 U2 3 PU WOODHEAD PUBL LTD PI CAMBRIDGE PA ABINGTON HALL ABINGTON, CAMBRIDGE CB1 6AH, CAMBS, ENGLAND BN 978-1-78063-319-0; 978-1-84334-681-4 J9 CHAND PUBL SOC MEDIA PY 2012 IS 2 BP 105 EP 122 PG 18 WC Information Science & Library Science SC Information Science & Library Science GA BEC61 UT WOS:000316077600007 ER PT B AU Williams, LY AF Williams, Lynne Y. BE Neal, DR TI Who is the 'virtual' you and do you know who's watching you? SO SOCIAL MEDIA FOR ACADEMICS: A PRACTICAL GUIDE SE Chandos Publishing Social Media Series LA English DT Article; Book Chapter DE privacy; identity theft; tags; Facebook; Twitter; profiling AB Navigating the minefield that comprises the privacy settings for the majority of social networking websites is at best a frustrating experience which leaves the user with the vague feeling that although they've left the house, the gas oven is still turned on. At worst, the host vendor of the social networking website deliberately prevents the user from modifying the privacy settings in such a way that the user's privacy is genuinely protected. In all cases, the verbiage spelling out the user's privacy rights as supported by a given site tends to be so convoluted that even the most hardened lawyer would have difficulty teasing the sense out of it. The consequences of engaging in social networking without taking precautions can be severe, ranging from identity theft to being stalked online and abuse of personal information by a third party. Because user privacy is not in the best interests of the social networking vendors, it's up to users to look out for their own privacy and to set up safeguards that protect their social data, their identity and, ultimately, their 'virtual self'. C1 [Williams, Lynne Y.] Univ New Mexico, Los Alamos Natl Lab, Los Alamos, NM USA. [Williams, Lynne Y.] Univ New Mexico, Title Grant Programme 5, Los Alamos, NM USA. [Williams, Lynne Y.] Northern New Mexico Community Coll, Mexico City, DF, Mexico. [Williams, Lynne Y.] Santa Fe Community Coll, Gainesville, FL USA. [Williams, Lynne Y.] Univ New Mexico, Los Alamos, NM USA. RP Williams, LY (reprint author), Kaplan Univ, Mason, IA USA. NR 27 TC 0 Z9 0 U1 0 U2 1 PU WOODHEAD PUBL LTD PI CAMBRIDGE PA ABINGTON HALL ABINGTON, CAMBRIDGE CB1 6AH, CAMBS, ENGLAND BN 978-1-78063-319-0; 978-1-84334-681-4 J9 CHAND PUBL SOC MEDIA PY 2012 IS 2 BP 175 EP 192 PG 18 WC Information Science & Library Science SC Information Science & Library Science GA BEC61 UT WOS:000316077600011 ER PT S AU Siirola, JD Watson, JP AF Siirola, John D. Watson, Jean-Paul BE Karimi, IA Srinivasan, R TI Modeling and Optimization of Superstructure-based Stochastic Programs for Risk-aware Decision Support SO 11TH INTERNATIONAL SYMPOSIUM ON PROCESS SYSTEMS ENGINEERING, PTS A AND B SE Computer-Aided Chemical Engineering LA English DT Proceedings Paper CT 11th International Symposium on Process Systems Engineering (PSE) CY JUL 15-19, 2012 CL Singapore, SINGAPORE SP Int Org Proc Syst Engn DE Superstructure optimization; Generalized disjunctive programming; Stochastic programming AB This manuscript presents a unified software framework for modeling and optimizing large-scale engineered systems with uncertainty. We propose a Python-based "block-oriented" modeling approach for representing the discrete components within the system. Through the use of a modeling components library, the block-oriented approach facilitates a clean separation of system superstructure from the details of individual components. This approach also lends itself naturally to expressing design and operational decisions as disjunctive expressions over the component blocks. We then apply a Python-based risk and uncertainty analysis library that leverages the explicit representation of the mathematical program in Python to automatically expand the deterministic system model into a multi-stage stochastic program, which can then be solved either directly or via decomposition-based solution strategies. This manuscript demonstrates the application of this modeling approach for risk-aware analysis of an electric distribution system. C1 [Siirola, John D.; Watson, Jean-Paul] Sandia Natl Labs, Discrete Math & Complex Syst Dept, Albuquerque, NM 87185 USA. RP Siirola, JD (reprint author), Sandia Natl Labs, Discrete Math & Complex Syst Dept, POB 5800, Albuquerque, NM 87185 USA. EM jdsiiro@sandia.gov NR 9 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1570-7946 BN 978-0-444-59505-8 J9 COMPUT-AIDED CHEM EN PY 2012 VL 31 BP 1060 EP 1064 PG 5 WC Computer Science, Interdisciplinary Applications; Engineering, Chemical; Operations Research & Management Science SC Computer Science; Engineering; Operations Research & Management Science GA BEI18 UT WOS:000316676100204 ER PT S AU Hackebeil, GA Mann, AV Hart, WE Klise, KA Laird, CD AF Hackebeil, Gabriel A. Mann, Angelica V. Hart, William E. Klise, Katherine A. Laird, Carl D. BE Karimi, IA Srinivasan, R TI A Stochastic Programming Formulation for Disinfectant Booster Station Placement to Protect Large-Scale Water Distribution Systems SO 11TH INTERNATIONAL SYMPOSIUM ON PROCESS SYSTEMS ENGINEERING, PTS A AND B SE Computer Aided Chemical Engineering LA English DT Proceedings Paper CT 11th International Symposium on Process Systems Engineering (PSE) CY JUL 15-19, 2012 CL Singapore, SINGAPORE SP Int Org Proc Syst Engn DE optimal placement; weighted maximum coverage; water distribution systems ID NETWORKS AB We present a methodology for optimally locating disinfectant booster stations for response to contamination events in water distribution systems. A stochastic programming problem considering uncertainty in both the location and time of the contamination event is formulated resulting in an extensive form that is equivalent to the weighted maximum coverage problem. Although the original full-space problem is intractably large, we show a series of reductions that reduce the size of the problem by five orders of magnitude and allow solutions of the optimal placement problem for realistically sized water network models. C1 [Hackebeil, Gabriel A.; Mann, Angelica V.; Laird, Carl D.] Texas A&M Univ, Artie McFerrin Dept Chem Engn, College Stn, TX 77843 USA. [Hart, William E.] Informat & Data Anal Dept, Sandia Natl Labs, Albuquerque, NM 87185 USA. [Klise, Katherine A.] Geosci Res & Applicat Grp, Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Laird, CD (reprint author), Texas A&M Univ, Artie McFerrin Dept Chem Engn, College Stn, TX 77843 USA. EM carl.laird@tamu.edu FU Office of Advanced Scientific Computing Research within the Department of Energy Office of Science; Complex Interconnected Distributed Systems program; U. S. Department of Energy's National Nuclear Security Administration [DE- AC04- 94AL85000] FX This research was supported in part by the Office of Advanced Scientific Computing Research within the Department of Energy Office of Science, as part of the Complex Interconnected Distributed Systems program. Sandia National Laboratories is a multi- program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U. S. Department of Energy's National Nuclear Security Administration under contract DE- AC04- 94AL85000. The authors would like to thank Reagan Murray and Terra Haxton from the US Environmental Protection Agency for their guidance in this research. NR 6 TC 0 Z9 0 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1570-7946 BN 978-0-444-59505-8 J9 COMPUT-AIDED CHEM EN PY 2012 VL 31 BP 1462 EP 1466 PG 5 WC Computer Science, Interdisciplinary Applications; Engineering, Chemical; Operations Research & Management Science SC Computer Science; Engineering; Operations Research & Management Science GA BEI18 UT WOS:000316676100284 ER PT S AU Todd, MD Moro, EA Puckett, A AF Todd, Michael D. Moro, Erik A. Puckett, Anthony GP IEEE TI Simultaneous Measurement of Displacement and Velocity Using White Light Extrinsic Fabry-Perot Interferometry SO 2012 IEEE SENSORS PROCEEDINGS SE IEEE Sensors LA English DT Proceedings Paper CT 11th IEEE Sensors Conference CY OCT 28-31, 2012 CL Taipei, TAIWAN SP IEEE, Sensors Council, Sensirion, Natl Chiao Tung Univ, Nanotechnol & Micro Syst Assoc (NMA), Natl Cheng Kung Univ, Tsinghua Univ, Natl Sci Council, Bur Foreign Trade, Ind Technol Res Inst, Dept Informat & Tourism, Meet Taiwan, Clean Energy Technol (Ce Tech), Phison Elect Corp (PHISON), Everlight, Tong Hsing Elect Ind, Ltd, Natl Ctr High-Performance Comp (NCHC), Natl Appl Res Labs, Minist Foreign Affairs, Natl Program Nano Technol (NPNT) ID DYNAMICS; SENSORS AB Low-power (<5 mW) white light extrinsic Fabry-Perot interferometric sensors offer micron-level absolute position measurement capability for devices under test (DUTs) over large (cm) displacements. Because the position is determined directly by demodulating the interferogram, the sensors are robust to most common sources of power fluctuations but sensitive to DUT velocity, which induces Doppler shifting. This shifting results in interferogram bias errors as large as 50-100 mu m for DUT velocities as low as 0.1 mm/s. This paper derives a model for predicting this Doppler-induced bias in the interferogram and exploits the derived relationship with a dual-filter optical architecture to obtain simultaneously the DUT velocity and bias-corrected absolute displacement. This approach is successfully demonstrated with a prototype in lab bench experiment. (Approved for release; LA-UR # 12-23426) C1 [Todd, Michael D.] Univ Calif San Diego, Dept Struct Engn, La Jolla, CA 92093 USA. [Moro, Erik A.] Los Alamos Natl Lab, INST OFF, Los Alamos, NM 87545 USA. [Puckett, Anthony] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Todd, MD (reprint author), Univ Calif San Diego, Dept Struct Engn, La Jolla, CA 92093 USA. EM mdtodd@ucsd.edu; moro@lanl.gov; apuckett@lanl.gov FU LANL Enhanced Surveillance Campaign and Engineering Institute FX The authors acknowledge the LANL Enhanced Surveillance Campaign and Engineering Institute for funding this work. NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1930-0395 BN 978-1-4577-1766-6; 978-1-4577-1765-9 J9 IEEE SENSOR PY 2012 BP 1072 EP 1075 PG 4 WC Engineering, Electrical & Electronic; Remote Sensing SC Engineering; Remote Sensing GA BDY72 UT WOS:000315671100261 ER PT S AU Tubman, NM DuBois, JL Alder, BJ AF Tubman, Norm M. DuBois, Jonathan L. Alder, Berni J. BE Tanaka, S Rothstein, SM Lester, WA TI Recent Results in the Exact Treatment of Fermions at Zero and Finite Temperature SO ADVANCES IN QUANTUM MONTE CARLO SE ACS Symposium Series LA English DT Proceedings Paper CT Symposium on Advances in Quantum Monte Carlo CY DEC 15-20, 2010 CL Honolulu, HI SP Amer Chem Soc, Phys Chem Div, Silicon Graph Inc ID QUANTUM-MONTE-CARLO; ELECTRON SYSTEMS; MOLECULES; HELIUM AB We present release-node quantum Monte Carlo simulations of the first row diatomic molecules and assess how accurately their ground state energies can be obtained with current computational resources. An explicit analysis of the fermion-boson energy difference shows a strong dependence on the nuclear charge, Z, which in turn determines the growth of the variance of the release-node energy. We show that efficiency gains from maximum entropy analysis are modest and that extrapolation to the ground state is tractable only for the low Z elements. For finite temperatures we discuss what can be gleaned from the structure of permutation space for interacting Fermi systems. We then demonstrate improved efficiency in the exact path integral Monte Carlo treatment of liquid He-3 by using importance sampling to deemphasize the contribution of long permutation cycles to the partition function. C1 [Tubman, Norm M.; DuBois, Jonathan L.; Alder, Berni J.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Tubman, NM (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM normantubman2015@u.northwestern.edu NR 30 TC 3 Z9 3 U1 1 U2 4 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 978-0-8412-2750-7 J9 ACS SYM SER JI ACS Symp. Ser. PY 2012 VL 1094 BP 41 EP 50 PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA BEI59 UT WOS:000316716800004 ER PT S AU Cook, JM Palmer, JM Rabin, ECS Stonehill, LC Thompson, DC Whittemore, SR Ulibarri, MD AF Cook, Jonathan M. Palmer, Joseph M. Rabin, Ellen C. S. Stonehill, Laura C. Thompson, David C. Whittemore, Stephen R. Ulibarri, Michael D. BE Mohseni, H Agahi, MH Razeghi, M TI A photon-counting camera system developed from a crossed-strip detector SO BIOSENSING AND NANOMEDICINE V SE Proceedings of SPIE LA English DT Proceedings Paper CT Conference on Biosensing and Nanomedicine V CY AUG 12-15, 2012 CL San Diego, CA SP SPIE DE photon counting; imaging detectors; position-sensitive detectors AB A crossed-strip detector initially developed at UC Berkeley's Space Sciences Laboratory has been demonstrated as a laboratory benchtop instrument and is now in the process of being integrated by Los Alamos National Laboratory into a portable, real-time, single-photon-counting camera system. The crossed-strip detector consists of 32 anode strips along each of two axes sealed inside a vacuum tube behind a photocathode and a microchannel-plate stack. A photon incident on the photocathode produces a cloud of charge from the microchannel plates that falls onto a portion of the 64 anode strips, producing a signal on a subset of channels along each axis and requiring that all anode channels continually be analyzed simultaneously. To maximize the photon flux that can be accepted by the sensor with minimal deadtime, the crossed-strip sensor has been combined with shorter-shaping-time amplifiers and higher-rate digitizers than previously used. With the ultimate goal of reaching 100 million events per second, FPGA-implementable algorithms have been developed for the identification of pulses on each anode channel and the determination of the pulses' time and amplitude. From the pulse times and amplitudes, a charge cloud can be reconstructed and the centroid determined to produce the time and position of each incident photon. The data-analysis procedure will be discussed, measurements detailing the performance of the camera system as it exists at this point will be presented, and the planned layout of the embedded camera system hardware will be detailed. C1 [Cook, Jonathan M.; Palmer, Joseph M.; Rabin, Ellen C. S.; Stonehill, Laura C.; Thompson, David C.; Whittemore, Stephen R.; Ulibarri, Michael D.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Cook, JM (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM jcook@lanl.gov NR 8 TC 0 Z9 0 U1 0 U2 1 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 978-0-8194-9177-0 J9 PROC SPIE PY 2012 VL 8460 AR 84601C DI 10.1117/12.930148 PG 10 WC Engineering, Biomedical; Nanoscience & Nanotechnology; Optics SC Engineering; Science & Technology - Other Topics; Optics GA BEH80 UT WOS:000316633700019 ER PT S AU Leonhardt, D Han, SM AF Leonhardt, Darin Han, Sang M. BE Obeng, Y Karim, Z Srinivasan, P DeGendt, S Misra, D TI New Method to Produce High-Quality Epitaxial Ge on Si Using SiO2-Lined Etch Pits and Epitaxial Lateral Overgrowth for III-V Integration SO GRAPHENE, GE/III-V, NANOWIRES, AND EMERGING MATERIALS FOR POST-CMOS APPLICATIONS 4 SE ECS Transactions LA English DT Proceedings Paper CT 4th International Symposium on Graphene, Ge/III-V and Emerging Materials For Post-CMOS Applications CY MAY 06-10, 2012 CL Seattle, WA SP Electrochem Soc, Electrochem Soc, Dielectr Sci and Technol Div, Electrochem Soc, New Technol Comm, AIXTRON, Elect and Photon ID PERFORMANCE AB We have developed a unique method of reducing the threading dislocation density in Ge epitaxially grown on Si. A heteroepitaxial layer of Ge is initially grown on Si substrate in which the threading dislocation density is 2.6 x 10(8) cm(-2). The Ge film is etched to produce pits on the surface that correspond to the location of threading dislocations. The Ge surface with etch pits is processed further to produce a 15 nm thick layer of SiO2 within the etch pits, but not on the top planar Ge film surface. Further lateral and selective epitaxial Ge growth results in a Ge film that forms and coalesces over the SiO2 lined etch pits. The SiO2 blocks the threading dislocations from propagating into the subsequent Ge epilayer. Etching the subsequent Ge epilayer reveals a density of 1.7 x 10(6) cm(-2) threading dislocations. This corresponds to a decrease in the overall defect density by a factor of 31 compared to the initial Ge on Si layer. The threading dislocations likely result from shallow etch pits in which SiO2 is inadvertently removed from the pit during one of the processing steps. The dislocations in pits without SiO2 continue to propagate into the subsequent Ge epilayer. Reducing the dislocation density in the initial Ge layer should result in fewer defects in the subsequent Ge layer, making the layer suitable for electronic device fabrication. C1 [Leonhardt, Darin] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. [Han, Sang M.] Univ New Mexico, Dept Chem & Nucl Engn, Albuquerque, NM 87131 USA. RP Leonhardt, D (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. FU National Science Foundation [DMR-0907112, CMMI-1068970]; TEM facility at the University of New Mexico FX The above material is based upon work supported by, or in part by, the National Science Foundation (DMR-0907112 and CMMI-1068970). The authors also acknowledge the use of TEM facility at the University of New Mexico. NR 5 TC 0 Z9 0 U1 1 U2 4 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA SN 1938-5862 BN 978-1-60768-314-8; 978-1-56677-956-2 J9 ECS TRANSACTIONS PY 2012 VL 45 IS 4 BP 147 EP 149 DI 10.1149/1.3700464 PG 3 WC Electrochemistry; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary SC Electrochemistry; Science & Technology - Other Topics; Materials Science GA BEJ36 UT WOS:000316890000017 ER PT J AU Wendt, JD Whitton, MC Adalsteinsson, D Brooks, FP AF Wendt, Jeremy D. Whitton, Mary C. Adalsteinsson, David Brooks, Frederick P., Jr. BE Coquillart, S Feiner, S Kiyokawa, K TI Reliable Forward Walking Parameters from Head-Track Data Alone SO IEEE VIRTUAL REALITY CONFERENCE 2012 PROCEEDINGS LA English DT Proceedings Paper CT 19th IEEE Virtual Reality Conference CY MAR 04-08, 2012 CL Costa Mesa, CA SP IEEE, IEEE Comp Soc, IEEE Visualizat & Graph Tech Comm AB Head motion during real walking is complex: The basic translational path is obscured by head bobbing. Many VE applications would be improved if a bobbing-free path were available. This paper introduces a model that describes head position while walking in terms of a bobbing free path and the head bobs. We introduce two methods to approximate the model from head-track data. C1 [Wendt, Jeremy D.] Sandia Natl Labs, Livermore, CA 94550 USA. [Whitton, Mary C.; Adalsteinsson, David; Brooks, Frederick P., Jr.] Univ N Carolina, Chapel Hill, NC USA. RP Wendt, JD (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA. EM jdwendt@sandia.gov; whitton@cs.unc.edu; david@amath.unc.edu; brooks@cs.unc.edu FU NIH NIBIB; U. S. Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000] FX This was supported in part by the NIH NIBIB.; Sandia National Laboratories is a multi- program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U. S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. NR 10 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-1246-2 PY 2012 BP 81 EP + PG 2 WC Computer Science, Cybernetics SC Computer Science GA BEJ84 UT WOS:000317006300029 ER PT S AU Vasdekis, AE Cuennet, JG Psaltis, D AF Vasdekis, A. E. Cuennet, J. G. Psaltis, D. BE Khoo, IC TI Liquid Crystal Optofluidics SO LIQUID CRYSTALS XVI SE Proceedings of SPIE LA English DT Proceedings Paper CT Conference on Liquid Crystals XVI CY AUG 12-15, 2012 CL San Diego, CA SP SPIE DE optofluidics; liquid crystals; microfluidics; surface optics ID WAVE-GUIDES; FLOW; NANOPARTICLES; MANIPULATION; CONFINEMENT; LIGHT AB By employing anisotropic fluids and namely liquid crystals, fluid flow becomes an additional degree of freedom in designing optofluidic devices. In this paper, we demonstrate optofluidic liquid crystal devices based on the direct flow of nematic liquid crystals in microfluidic channels. Contrary to previous reports, in the present embodiment we employ the effective phase delay acquired by light travelling through flowing liquid crystal, without analysing the polarisation state of the transmitted light. With this method, we demonstrate the variation in the diffraction pattern of an array of microfluidic channels acting as a grating. We also discuss our recent activities in integrating mechanical oscillators for on-chip peristaltic pumping. C1 [Vasdekis, A. E.; Cuennet, J. G.; Psaltis, D.] Pacific NW Natl Lab, Environm Mol Sci Lab, POB 999, Richland, WA 99352 USA. RP Vasdekis, AE (reprint author), Pacific NW Natl Lab, Environm Mol Sci Lab, POB 999, Richland, WA 99352 USA. EM andreas.vasdekis@epfl.ch OI Vasdekis, Andreas/0000-0003-4315-1047 NR 31 TC 2 Z9 2 U1 0 U2 5 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 978-0-8194-9192-3 J9 PROC SPIE PY 2012 VL 8475 AR 847507 DI 10.1117/12.928497 PG 7 WC Crystallography; Optics SC Crystallography; Optics GA BEH83 UT WOS:000316634600004 ER PT S AU Hitchcock, AP Leung, BO Brash, JL Scholl, A Doran, A AF Hitchcock, Adam P. Leung, Bonnie O. Brash, John L. Scholl, Andreas Doran, Andrew BE Horbett, T Brash, JL Norde, W TI Soft X-ray Spectromicroscopy of Protein Interactions with Phase-Segregated Polymer Surfaces SO PROTEINS AT INTERFACES III: STATE OF THE ART SE ACS Symposium Series LA English DT Proceedings Paper CT Symposium on Proteins at Interfaces 3 - State of the Art CY MAR 25-29, 2012 CL San Diego, CA SP ACS, Div Colloid & Surface Chem ID PHOTOEMISSION ELECTRON-MICROSCOPE; BIOSENSOR APPLICATIONS; ALBUMIN ADSORPTION; FORCE MICROSCOPY; IONIC-STRENGTH; DRUG-RELEASE; BIOMATERIALS; POLYLACTIDE; BLEND; SPECTROSCOPY AB Quantitative spectro-microscopic characterization of the interfaces between polymers and relevant proteins helps understand fundamental issues of protein polymer interactions and can provide insights into biocompatibility. Synchrotron based X-ray photoemission electron microscopy (X-PEEM) and scanning transmission X-ray microscopy (STXM) are being used to study distributions of proteins adsorbed on chemically heterogeneous polymer surfaces with similar to 30 nm spatial resolution. The relevant contrast in each technique is X-ray absorption spectroscopy which provides speciation and quantitation of both adsorbed proteins or peptides (and in combinations), simultaneously with chemically sensitive imaging of the underlying polymer substrate. An overview of recent progress in this field is given, along with some comparisons to complementary techniques (AFM and TOF-SIMS) for investigating protein-polymer interfaces. C1 [Hitchcock, Adam P.] McMaster Univ, BIMR, Chem & Chem Biol, Hamilton, ON L8S 4M1, Canada. [Leung, Bonnie O.] Alberta Environm & Sustainable Resource Dev, Edmonton, AB T5K 2J6, Canada. [Brash, John L.] McMaster Univ, Sch Biomed Engn, Hamilton, ON L8S 4M1, Canada. [Scholl, Andreas; Doran, Andrew] Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. RP Hitchcock, AP (reprint author), McMaster Univ, BIMR, Chem & Chem Biol, Hamilton, ON L8S 4M1, Canada. EM aph@mcmaster.ca FU Natural Sciences and Engineering Research Council (NSERC, Canada); AFMNet; Canada Research Chairs program; US Department of Energy [DE-ACO3-76SF00098]; NSERC; CIHR; NRC; University of Saskatchewan FX We thank the Hancock Research Group from UBC for providing the SUB-6 peptide. We thank J. Goh for providing the collagen sample and AFM images. We thank D. Castner and T. Weidner for providing the SAM micro-array samples, the C Is reference spectra and the TOF-SIMS results. This research was supported by the Natural Sciences and Engineering Research Council (NSERC, Canada), AFMNet and the Canada Research Chairs program. X-ray microscopy was carried out using PEEM2, PEEM3 and STXM5322 at the ALS and the CaPeRS PEEM and STXM at the CLS. The ALS is supported by the US Department of Energy under Contract DE-ACO3-76SF00098. The CLS is supported by NSERC, CIHR, NRC and the University of Saskatchewan. We thank the staff scientists, David Kilcoyne and Tolek Tyliszczak (ALS) and Jian Wang, Uday Lanke and Chithra Karunakaran (CLS) for their expert support of the beam lines and microscopes. NR 67 TC 1 Z9 1 U1 2 U2 8 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 978-0-8412-2796-5 J9 ACS SYM SER JI ACS Symp. Ser. PY 2012 VL 1120 BP 731 EP + PG 6 WC Biochemical Research Methods; Biochemistry & Molecular Biology; Chemistry, Physical SC Biochemistry & Molecular Biology; Chemistry GA BEI65 UT WOS:000316717400034 ER PT S AU Vukmirovic, MB Cai, Y Bliznakov, ST Sasaki, K Wang, JX Adzic, RR AF Vukmirovic, Miomir B. Cai, Yun Bliznakov, Stoyan T. Sasaki, Kotaro Wang, Jia X. Adzic, Radoslav R. BE Zawodzinski, T Mukerjee, S Strasser, P TI Platinum Monolayer Electrocatalysts for the Oxygen Reduction Reaction SO TUTORIALS ON ELECTROCATALYSIS IN LOW TEMPERATURE FUEL CELLS SE ECS Transactions LA English DT Proceedings Paper CT Symposium on Tutorials on Electrocatalysis in Low Temperature Fuel Cells held during the 221st Meeting of the Electrochemical-Society CY MAY 06-10, 2012 CL Seattle, WA SP Electrochem Soc (ECS), Phys and Analyt Electrochemistry, Energy Technol, Ind Electrochemistry and Electrochem Engn ID LIMITED REDOX REPLACEMENT; O-2 REDUCTION; EPITAXIAL-GROWTH; GALVANIC DISPLACEMENT; CATALYTIC-ACTIVITY; METAL; SURFACES; ALLOY; NANOPARTICLES; DEPOSITION AB The Pt monolayer electrocatalysts for the oxygen reduction reaction is the most promising approach to reduce the content of Pt in fuel cells while meeting all the performance and durability requirements. An ample illustration of the broad possibilities of tailoring Pt monolayer properties is presented thus revealing the potential of Pt monolayer electrocatalysts for resolving problems of availability of Pt in future catalysis and electrocatalysis and removing the main obstacles to the broad scale application of fuel cell technology. C1 [Vukmirovic, Miomir B.; Cai, Yun; Bliznakov, Stoyan T.; Sasaki, Kotaro; Wang, Jia X.; Adzic, Radoslav R.] Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RP Vukmirovic, MB (reprint author), Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. RI cai, yun/G-2689-2013; Wang, Jia/B-6346-2011 NR 31 TC 2 Z9 2 U1 0 U2 25 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA SN 1938-5862 BN 978-1-60768-312-4 J9 ECS TRANSACTIONS PY 2012 VL 45 IS 2 BP 15 EP 23 DI 10.1149/1.3701965 PG 9 WC Electrochemistry; Energy & Fuels SC Electrochemistry; Energy & Fuels GA BEJ45 UT WOS:000316906200002 ER PT S AU Weber, AZ AF Weber, Adam Z. BE Zawodzinski, T Mukerjee, S Strasser, P TI Macroscopic Modeling of the Proton-Exchange-Membrane Fuel-Cell Catalyst Layer SO TUTORIALS ON ELECTROCATALYSIS IN LOW TEMPERATURE FUEL CELLS SE ECS Transactions LA English DT Proceedings Paper CT Symposium on Tutorials on Electrocatalysis in Low Temperature Fuel Cells held during the 221st Meeting of the Electrochemical-Society CY MAY 06-10, 2012 CL Seattle, WA SP Electrochem Soc (ECS), Phys and Analyt Electrochemistry, Energy Technol, Ind Electrochemistry and Electrochem Engn ID OXYGEN REDUCTION REACTION; PLATINUM; TRANSPORT; MICROELECTRODE; INTERFACE; KINETICS AB In the catalyst layers, all of the various phases of a fuel cell exist. Thus, there is membrane, gas, liquid, and solid (mainly carbon). In addition, there are electrocatalysts where the charge-transfer reactions take place. An accurate model of a catalyst layer requires that all of these phases and their various interactions be modeled from a physical perspective. In this transaction, the macroscopic modeling approaches towards a catalyst layer will be discussed. Specifically, the modeling and multi-scaling of catalyst-layer phenomena will be introduced including accounting of Pt-oxide formation and non-unity reaction orders in a simultaneous reaction/diffusion framework. Of particular interest is the modeling and accounting of recently observed unexpected mass-transport limitations at very low Pt loadings. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Weber, AZ (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. OI Weber, Adam/0000-0002-7749-1624 NR 18 TC 1 Z9 1 U1 0 U2 6 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA SN 1938-5862 BN 978-1-60768-312-4 J9 ECS TRANSACTIONS PY 2012 VL 45 IS 2 BP 71 EP 83 DI 10.1149/1.3701969 PG 13 WC Electrochemistry; Energy & Fuels SC Electrochemistry; Energy & Fuels GA BEJ45 UT WOS:000316906200006 ER PT S AU Greeley, J AF Greeley, J. BE Zawodzinski, T Mukerjee, S Strasser, P TI Computational Studies of Trends in Electrocatalysis SO TUTORIALS ON ELECTROCATALYSIS IN LOW TEMPERATURE FUEL CELLS SE ECS Transactions LA English DT Proceedings Paper CT Symposium on Tutorials on Electrocatalysis in Low Temperature Fuel Cells held during the 221st Meeting of the Electrochemical-Society CY MAY 06-10, 2012 CL Seattle, WA SP Electrochem Soc (ECS), Phys and Analyt Electrochemistry, Energy Technol, Ind Electrochemistry and Electrochem Engn ID DENSITY-FUNCTIONAL THEORY; NEAR-SURFACE ALLOYS; HETEROGENEOUS CATALYSIS; OXYGEN REDUCTION; HYDROGEN EVOLUTION; 1ST-PRINCIPLES CALCULATIONS; TRANSITION-METALS; AMMONIA-SYNTHESIS; ADSORPTION; DECOMPOSITION AB A brief overview of concepts relevant to the use of first principles Density Functional Theory calculations for screening of novel electrocatalysts is presented. The development of volcano plots for common electrocatalytic reactions, including the Hydrogen Evolution Reaction and the Oxygen Reduction Reaction, is described, and the use of these plots to identify improved catalysts for these reactions is discussed. Selected future directions for this field are briefly summarized at the conclusion. C1 Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA. RP Greeley, J (reprint author), Argonne Natl Lab, Ctr Nanoscale Mat, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 43 TC 1 Z9 1 U1 1 U2 18 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA SN 1938-5862 BN 978-1-60768-312-4 J9 ECS TRANSACTIONS PY 2012 VL 45 IS 2 BP 85 EP 95 DI 10.1149/1.3701970 PG 11 WC Electrochemistry; Energy & Fuels SC Electrochemistry; Energy & Fuels GA BEJ45 UT WOS:000316906200007 ER PT S AU Zhu, XB Kerr, JB He, QG Hwang, G Martin, Z Clark, K Weber, A Zhao, NN AF Zhu, Xiaobing Kerr, John B. He, Qinggang Hwang, Gisuk Martin, Zulima Clark, Kyle Weber, Adam Zhao, Nana BE Zawodzinski, T Mukerjee, S Strasser, P TI Bridge to Fuel Cell Molecular Catalysis: 3D non-Platinum Group Metal Catalyst in MEAs SO TUTORIALS ON ELECTROCATALYSIS IN LOW TEMPERATURE FUEL CELLS SE ECS Transactions LA English DT Proceedings Paper CT Symposium on Tutorials on Electrocatalysis in Low Temperature Fuel Cells held during the 221st Meeting of the Electrochemical-Society CY MAY 06-10, 2012 CL Seattle, WA SP Electrochem Soc (ECS), Phys & Analyt Electrochemistry, Energy Technol, Ind Electrochemistry & Electrochem Engn DE PEM fuel cells; molecular catalysis; non-Platinum Group Metal (PGM) catalyst ID ELECTROCHEMICAL REACTIONS AB Transition metal porphyrin complexes have been mounted in a three dimensional homogenous distribution inside the ionomer of catalyst layers in MEAs to achieve competitive fuel cell catalysis activity. The effect of electrode components including ionomer, carbon, catalyst, and mediator, and ionomer film thickness, is investigated in fuel cell molecular catalysis system. Membrane electrode assembly (MEA) durability testing has been conducted. SEM and TEM techniques are employed to investigate molecular catalysis electrode micro-and nano-structure and morphology. To date, surprisingly, the best fuel cell performance, i.e. 1280 mA/cm(2) of maximum/short-circuit current density is achieved, approaching that of Pt-based electrode, indicating higher turnover frequencies than Pt although with poorer voltages. C1 [Zhu, Xiaobing; Kerr, John B.; He, Qinggang; Hwang, Gisuk; Martin, Zulima; Clark, Kyle; Weber, Adam] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Environm Energy Technol Div, 1 Cyclotron Rd,Mail Stop 62R203, Berkeley, CA 94720 USA. [Zhao, Nana] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA. RP Zhu, XB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Environm Energy Technol Div, 1 Cyclotron Rd,Mail Stop 62R203, Berkeley, CA 94720 USA. EM jbkerr@lbl.gov RI He, Qinggang/O-7639-2014; OI He, Qinggang/0000-0002-7693-8017; Weber, Adam/0000-0002-7749-1624; Zhu, Xiaobing/0000-0003-1789-2546 FU U.S. Department of Energy [DE-AC02-05CH1123] FX This material is based upon work supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Fuel Cell Technologies of the U.S. Department of Energy under Contract No. DE-AC02-05CH1123. NR 7 TC 4 Z9 4 U1 3 U2 11 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA SN 1938-5862 BN 978-1-60768-312-4; 978-1-56677-954-8 J9 ECS TRANSACTIONS PY 2012 VL 45 IS 2 BP 143 EP 152 DI 10.1149/1.3701976 PG 10 WC Electrochemistry; Energy & Fuels SC Electrochemistry; Energy & Fuels GA BEJ45 UT WOS:000316906200013 ER PT S AU Visimberga, G Faulkner, CC Boese, M O'Dwyer, C AF Visimberga, G. Faulkner, C. C. Boese, M. O'Dwyer, C. BE Stokes, EB Hunter, GW Mi, Z Horng, RH Karim, Z ODwyer, C TI Core-Shell ZnO Nanorod Lasers SO WIDE-BANDGAP SEMICONDUCTOR MATERIALS AND DEVICES 13 SE ECS Transactions LA English DT Proceedings Paper CT 13th Symposium on Wide Bandgap Semiconductor Materials and Devices held during the 221st Meeting of the Electrochemical-Society CY MAY 06-10, 2012 CL Seattle, WA SP Electrochem Soc (ECS), ECS, Elect & Photon Div, Dielectr Sci & Technol Div, Sensor Div ID ROOM-TEMPERATURE; OPTOELECTRONIC DEVICES; OPTICAL GAIN; CONFINEMENT AB Room-temperature ultraviolet lasing in [0001] oriented zinc oxide nanorods are grown on silicon and fused silica substrates by a simple vapor transport and condensation process. These wide band-gap semiconductor nanorods form natural laser cavities with diameters varying from 150 to 350 nm and lengths up to 10 mu m. Under optical excitation, surface-emitting lasing action was observed at 385 nm. The dielectric core-shell Al2O3@ZnO nanorods exhibit enhanced axial Fabry-Perot resonating characteristics with (0001) crystal faces acting as mirror facets and improved by a metallic reflector at one end. This metallic coating and dielectric oxide shell greatly increase near-band edge emission while reducing excitation power thresholds due to lower losses and increased optical density from improved refractive index mediated waveguiding during optical pumping. C1 [Visimberga, G.] Natl Univ Ireland Univ Coll Cork, Tyndall Natl Inst, Cork, Ireland. [Faulkner, C. C.; Boese, M.] Trin Coll Dublin, Ctr Res Adapt Nanostructures & Nanodevices CRANN, Dublin 2, Ireland. Natl Ctr Elect Microscopy, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [O'Dwyer, C.] Univ Limerick, Dept Phys & Energy, Limerick, Ireland. [O'Dwyer, C.] Univ Limerick, Mat & Surface Sci Inst, Limerick, Ireland. RP Visimberga, G (reprint author), Natl Univ Ireland Univ Coll Cork, Tyndall Natl Inst, Cork, Ireland. RI O'Dwyer, Colm/F-9784-2011 OI O'Dwyer, Colm/0000-0001-7429-015X FU EU Framework 6 Network of Excellence PhOREMOST and Science Foundation Ireland [7/SK/B1232a]; Irish Government's Programme for Research in Third Level Institutions; National Development Plan 2007-2013 FX This work was supported by EU Framework 6 Network of Excellence PhOREMOST and Science Foundation Ireland under grant No. 07/SK/B1232a. Part of this work was conducted under the framework of the INSPIRE programme, funded by the Irish Government's Programme for Research in Third Level Institutions, Cycle 4, National Development Plan 2007-2013. NR 26 TC 0 Z9 0 U1 0 U2 6 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA SN 1938-5862 BN 978-1-60768-317-9; 978-1-56677-959-3 J9 ECS TRANSACTIONS PY 2012 VL 45 IS 7 BP 51 EP 59 DI 10.1149/1.3701525 PG 9 WC Electrochemistry; Engineering, Electrical & Electronic SC Electrochemistry; Engineering GA BEI25 UT WOS:000316687500007 ER PT B AU Bull, D Jacob, P AF Bull, Diana Jacob, Paul GP IEEE TI Methodology for creating nonaxisymmetric WECs to screen mooring designs using a Morison Equation approach SO 2012 OCEANS LA English DT Proceedings Paper CT MTS/IEEE Oceans Conference CY OCT 14-19, 2012 CL Virginia Beach, VA SP IEEE, Marine Technol Soc, IEEE Ocean Engn Soc DE WEC; BBDB; OWC; OrcaFlex; mooring; Morison Equation; extreme wave environment AB This paper outlines a methodology to derive the rigid body motions from Morison Equation forces for a floating Backward Bent Duct Buoy (BBDB). This Wave Energy Converter (WEC) is a particular style of Oscillating Water Column (OWC). The methodology details how to decompose the BBDB into a series of 'hydrodynamic bodies' to account for inertial and viscous effects, 'structural bodies' to account for structural mass and inertia, and freely flooding bodies to account for the time dependent variation of entrained water mass in the OWC of the device. Separating these effects allows for independent treatment of the phenomena being modeled and for an easily adaptable WEC model. Because effects of the PTO can be eliminated when considering extreme conditions, OrcaFlex, a validated mooring time domain solver, is applied to this problem. Thus coupled analysis between the proposed mooring system design and the BBDB dynamic response allows for mooring system component specification. Due to the dependence of Morison Equation force magnitudes on empirically derived drag coefficients, the paper concludes with a study quantifying the effect of drag coefficient magnitude on survival mooring loads. C1 [Bull, Diana] Sandia Natl Labs, Water Power Technol, POB 5800, Albuquerque, NM 87185 USA. [Jacob, Paul] Jacob Technol, Sugar Land, TX 77478 USA. RP Bull, D (reprint author), Sandia Natl Labs, Water Power Technol, POB 5800, Albuquerque, NM 87185 USA. EM Diana.Bull@sandia.gov; pj@jtec-tx.com FU Department of Energy's Energy Efficiency and Renewable Energy Office's Wind and Water Power Program FX This research was made possible by support from the Department of Energy's Energy Efficiency and Renewable Energy Office's Wind and Water Power Program. NR 13 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-0829-8; 978-1-4673-0830-4 PY 2012 PG 9 WC Engineering, Multidisciplinary; Telecommunications SC Engineering; Telecommunications GA BDW56 UT WOS:000315350300090 ER PT B AU Li, Y Yi, JH Sale, D AF Li, Ye Yi, Jin-Hak Sale, Danny GP IEEE TI y Recent Improvement of Optimization Methods in a Tidal Current Turbine Optimal Design Tool SO 2012 OCEANS LA English DT Proceedings Paper CT MTS/IEEE Oceans Conference CY OCT 14-19, 2012 CL Virginia Beach, VA SP IEEE, Marine Technol Soc, IEEE Ocean Engn Soc DE Tidal Power; Tidal Current Turbine; Design and Optimization AB In this paper, we present the current turbine optimization design tool improvements implemented since the initial presentation of this tool in 2009. We first briefly review the existing code. Then, we show advanced optimization methods that can significantly improve the efficiency using a hybrid method that combines a genetic algorithm, a pattern search method, and a constrained simplex method. By comparing the newly developed hybrid method with the previously implemented genetic algorithm, we found that the hybrid optimization scheme can reduce the computation time by over 30%, while still obtaining similar or higher quality solutions. Additionally, we discuss the extensive improvements, focusing on the final objective function value, computation time, optimal design (including blade shape, rpm, and pitch angle), and power curve, with respect to current velocity and loads (including torque, thrust force, and root-flap bending moment). C1 [Li, Ye] Natl Renewable Energy Lab, Natl Wind Technol Ctr, Golden, CO USA. [Yi, Jin-Hak] Korea Inst Ocean Sci & Technol, Coastal Dev & Ocean Energy Dept, Ansan, South Korea. [Sale, Danny] Univ Washington, Dept Mech Engn, Washington, DC USA. RP Li, Y (reprint author), Natl Renewable Energy Lab, Natl Wind Technol Ctr, Golden, CO USA. EM ye.li@nrel.gov; yijh@kordi.re.kr FU U.S. Department of Energy's Water Power Program FX We acknowledge the support of the U.S. Department of Energy's Water Power Program for this work. We thank colleagues at the National Renewable Energy Laboratory National Wind Technology Center for providing valuable comments. NR 7 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-0829-8; 978-1-4673-0830-4 PY 2012 PG 8 WC Engineering, Multidisciplinary; Telecommunications SC Engineering; Telecommunications GA BDW56 UT WOS:000315350300307 ER PT B AU Ren, HY Deng, ZD Carlson, TJ Sun, YN Fu, T Martinez, JJ Matzner, S Myers, JR AF Ren, Huiying Deng, Z. Daniel Carlson, Thomas J. Sun, Yannan Fu, Tao Martinez, Jayson J. Matzner, Shari Myers, Joshua R. GP IEEE TI Localization of Southern Resident Killer Whales Using Two Star Arrays to Support Marine Renewable Energy SO 2012 OCEANS LA English DT Proceedings Paper CT MTS/IEEE Oceans Conference CY OCT 14-19, 2012 CL Virginia Beach, VA SP IEEE, Marine Technol Soc, IEEE Ocean Engn Soc DE Passive acoustic system; localization; star array; bearings ID ACOUSTIC TELEMETRY SYSTEM; TRACKING; ENVIRONMENT AB Tidal power has been identified as one of the most promising commercial-scale renewable energy sources. Puget Sound, Washington, is a potential site to deploy tidal power generating devices. The risk of injury for killer whales needs to be managed before the deployment of these types of devices will be approved by regulating authorities. A passive acoustic system consisting of two star arrays, each with four hydrophones, was designed and implemented for the detection and localization of Southern Resident killer whales. Performance evaluation of the passive acoustic system was conducted at Sequim Bay, Washington. A total of nine sound source locations were chosen, within a radius of 250 m around the star arrays, to evaluate the accuracy of our localization approach. A localization algorithm, a least square solver, was applied to obtain a bearing location to a sound source from each star array. The sound source location was estimated by the intersection of the bearings from the two star arrays. Bearing and distance errors were computed to compare calculated and true (from Global Positioning System) sound source locations. Observed bearing errors were within 1.04 for eight of the nine test locations; location 3 had bearing errors slightly larger than expected due to a high level of background noise. The distance errors for six of the test locations were between 1.91 and 32.36 m. The other two test locations, 8 and 9, were near the line passing through the centers of the two star arrays, where large errors were expected based on theoretical sensitivity analysis results. C1 [Ren, Huiying; Deng, Z. Daniel; Carlson, Thomas J.; Sun, Yannan; Fu, Tao; Martinez, Jayson J.; Matzner, Shari; Myers, Joshua R.] Pacific NW Natl Lab, Richland, WA 99354 USA. RP Deng, ZD (reprint author), Pacific NW Natl Lab, Richland, WA 99354 USA. EM zhiqun.deng@pnnl.gov RI Deng, Daniel/A-9536-2011 OI Deng, Daniel/0000-0002-8300-8766 NR 18 TC 1 Z9 1 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-0829-8; 978-1-4673-0830-4 PY 2012 DI 10.1109/OCEANS.2012.6405010 PG 7 WC Engineering, Multidisciplinary; Telecommunications SC Engineering; Telecommunications GA BDW56 UT WOS:000315350300227 ER PT J AU Ruehl, K Bull, D AF Ruehl, Kelley Bull, Diana GP IEEE TI Wave Energy Development Roadmap: Design to Commercialization SO 2012 OCEANS LA English DT Proceedings Paper CT MTS/IEEE Oceans Conference CY OCT 14-19, 2012 CL Virginia Beach, VA SP IEEE, Marine Technol Soc (MTS), IEEE OES (IEEE/OES) DE Wave Energy; Roadmap; Technology Readiness Levels; Numerical Modeling; Experimentation AB In order to promote and support development of the wave energy industry, Sandia National Laboratories (SNL) has developed a Wave Energy Development Roadmap. The Wave Energy Development Roadmap outlines the pathway from initial design to commercialization for Wave Energy Converter (WEC) technologies. Commercialization of a wave energy technology is embodied in the deployment of an array of WEC's, a WEC Farm. The development process is related to the commonly used metric of Technology Readiness Levels (TRLs). The roadmap incorporates modeling and experimental expectations at corresponding TRLs which provide a guide for the industry to pursue successful design optimizations, prototype deployments, and utility scale commercialization. The roadmap serves the additional purpose of pinpointing research gaps in the development process. C1 [Ruehl, Kelley; Bull, Diana] Sandia Natl Labs, Water Power Technol, Albuquerque, NM 87185 USA. RP Ruehl, K (reprint author), Sandia Natl Labs, Water Power Technol, POB 5800, Albuquerque, NM 87185 USA. EM kmruehl@sandia.gov NR 14 TC 0 Z9 0 U1 1 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-0829-8 PY 2012 PG 10 WC Engineering, Multidisciplinary; Telecommunications SC Engineering; Telecommunications GA BDW56 UT WOS:000315350300021 ER PT B AU Sullivan, RG Cothren, J Winters, SL Cooper, C Williamson, M Ball, D AF Sullivan, Robert G. Cothren, Jackson Winters, Snow L. Cooper, Chad Williamson, Malcolm Ball, David GP IEEE TI An Assessment of Offshore Wind Turbine Visibility in the United Kingdom SO 2012 OCEANS LA English DT Proceedings Paper CT MTS/IEEE Oceans Conference CY OCT 14-19, 2012 CL Virginia Beach, VA SP IEEE, Marine Technol Soc, IEEE Ocean Engn Soc DE Offshore; offshore wind; wind turbine visibility; visual impact; aesthetic impact; visual contrast; visual simulation; distance; United Kingdom; Argonne; CAST; BOEM; Atlantic AB The potential visual impact of offshore wind facilities on coastal lands has emerged as a major concern for the siting and future development of these facilities in Europe and the United States. The visibility and visual contrast of offshore wind facilities depend on complex interactions among facility size, turbine size and color, distance from shore, lighting, and weather and atmospheric conditions, as well as other factors that affect overall visibility. However, little systemic study of visibility and visual contrast of offshore wind facilities in real seascape settings has been conducted. As a result, there is uncertainty about the potential effects of offshore wind facilities on sensitive visual resource areas in coastal regions, such as national seashores, historic sites, and trail corridors. As part of a research study sponsored by the U. S. Department of the Interior's Bureau of Ocean Energy Management, an assessment of the visibility and visual contrast of 11 utility-scale offshore wind facilities was conducted in the United Kingdom in August and September of 2011. The observed facilities ranged from 25 to 140 turbines and were located within 5.5-52.0 km (3.4-32.3 mi) of 29 coastal viewpoints. Turbine power output ranged from 2.0 to 5.0 MW, with blade tip heights ranging from 113.5 to 153 m (372 to 502 ft). Study objectives included identifying the maximum distances at which the facilities could be seen from the coastal viewpoints in both daytime and night-time views and assessing the effect of distance on the degree of visual contrast associated with the facilities. Observers included a landscape architect, a geospatial visualization developer, and an archaeologist. For each facility, the observers recorded data about weather and lighting conditions, photographed the facilities at different focal lengths, and used a numeric scale to assess the facilities' degree of visibility. A total of 48 daytime observations of 11 offshore wind facilities were made, and an additional 6 observations were made at night. Weather and visibility conditions varied widely during the 10-day field study. In the course of this study, under favorable but not exceptional viewing conditions, moderate-sized offshore wind facilities were frequently found to be visible at distances exceeding 21 mi (34 km); they were visible at a maximum distance of 43 km (27 mi), as seen from an elevated viewpoint. With few exceptions, regardless of facility size or lighting conditions, on days with good visibility, offshore wind facilities were judged to be major foci of visual attention at distances of 16 km (10 mi) or less, suggesting potentially high levels of visual impact for sensitive viewers. Smaller wind facilities (25-48 turbines) were generally judged to be easily visible at distances of 23-24 km (14-15 mi). Larger offshore wind facilities (100 or more turbines) were judged likely to be seen easily by casual observers as far away as 29 km (18 mi), and were visible with extended or concentrated viewing at distances greater than 40 km (25 mi). That these distances are greater than those reported in previous studies is likely a function of the long-term trend toward larger offshore wind facilities with more and larger turbines than those assessed in previous studies. Turbine blade movement was visible in 42 of the 49 daytime observations, at distances as great as 42 km (26 mi) as seen from an elevated viewpoint, and was observed routinely at distances of 34 km (21 mi) or less. At night, aerial hazard navigation lighting was visible at distances greater than 39 km (24 mi). The study suggests that as countries begin siting offshore wind facilities with hundreds or even thousands of large wind turbines, there is potential for impacts on sensitive visual resources in coastal areas at greater distances than past studies have indicated. C1 [Sullivan, Robert G.] Argonne Natl Lab, Div Environm Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. [Cothren, Jackson; Winters, Snow L.; Cooper, Chad; Williamson, Malcolm] Univ Arkansas, Ctr Adv Spatial Technol, Fayetteville, AR USA. [Ball, David] US Dept Interior Bur Ocean Energy Management, Camarillo, CA USA. RP Sullivan, RG (reprint author), Argonne Natl Lab, Div Environm Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. FU Bureau of Ocean Energy Management; U.S. Department of Energy [DEAC02-06CH11357] FX Argonne National Laboratory's work was supported through the Fiscal Year 2010 National Oceanographic Partnership Program Broad Agency Announcement with the Bureau of Ocean Energy Management, U.S. Department of Energy, and the National Oceanic and Atmospheric Administration through U.S. Department of Energy contract DEAC02-06CH11357. The authors would like to express their appreciation to Kevin Beckman, Pamela Richmond, and Elizabeth Parent (Argonne National Laboratory) for their assistance in conducting this study and preparing this manuscript. NR 12 TC 0 Z9 0 U1 0 U2 7 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-0829-8; 978-1-4673-0830-4 PY 2012 PG 9 WC Engineering, Multidisciplinary; Telecommunications SC Engineering; Telecommunications GA BDW56 UT WOS:000315350300350 ER PT S AU Anders, A Slack, J AF Anders, Andre Slack, Jonathan GP IEEE TI Phase Transitions in Vacuum Arcs in the Context of Liquid Metal Arc Sources SO 25TH INTERNATIONAL SYMPOSIUM ON DISCHARGES AND ELECTRICAL INSULATION IN VACUUM (ISDEIV 2012) SE International Symposium on Discharges and Electrical Insulation in a Vacuum LA English DT Proceedings Paper CT 25th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) CY SEP 02-07, 2012 CL Tomsk, RUSSIA SP Plansee, Schneider Elect, Tavrida Elect (TEL), MICROSPLAV Co, Appl Elect (AE), DEIS, IEEE, Russian Fdn Basic Res (RFBR), Tomsk State Univ Control Syst & Radioelectronics (TYCYP), Tomsk State Univ, Siberian Branch Russian Acad Sci (SB RAS) AB Arc sources using liquid cathode material could enable very high rate deposition of metal and metal compounds of cathode materials of low melting point. Of special interest are cathodes of zinc, cadmium, tin, and indium as they can be used to deposit high quality transparent conducting oxide films. Phase transitions are briefly reviewed using phase diagrams and vapor pressure curves, and preliminary experiments are reported using a crucible designed to hold the solid or liquid cathode material. Liquid zinc showed evidence of boiling, and liquid tin emitted less and smaller macroparticles than the same source using solid tin. C1 [Anders, Andre; Slack, Jonathan] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Anders, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd,MS 53, Berkeley, CA 94720 USA. EM aanders@lbl.gov; jlslack@lbl.gov RI Anders, Andre/B-8580-2009 OI Anders, Andre/0000-0002-5313-6505 NR 14 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1093-2941 BN 978-1-4673-1263-9 J9 INT SYM DISCH ELECTR PY 2012 BP 305 EP 308 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BEB42 UT WOS:000315985400080 ER PT S AU Franz, R Wallig, J Polcik, P Anders, A AF Franz, R. Wallig, J. Polcik, P. Anders, A. GP IEEE TI Charge state distributions of Al and Cr cathodic arc plasmas SO 25TH INTERNATIONAL SYMPOSIUM ON DISCHARGES AND ELECTRICAL INSULATION IN VACUUM (ISDEIV 2012) SE International Symposium on Discharges and Electrical Insulation in a Vacuum LA English DT Proceedings Paper CT 25th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) CY SEP 02-07, 2012 CL Tomsk, RUSSIA SP Plansee, Schneider Elect, Tavrida Elect (TEL), MICROSPLAV Co, Appl Elect (AE), DEIS, IEEE, Russian Fdn Basic Res (RFBR), Tomsk State Univ Control Syst & Radioelectronics (TYCYP), Tomsk State Univ, Siberian Branch Russian Acad Sci (SB RAS) ID TEMPORAL DEVELOPMENT; ION; FLUCTUATIONS AB Ion charge state distributions of pulsed arcs have been measured for Al and Cr cathodes in vacuum and different background gases. The distance from the cathode to the extraction grid of the time-of-flight spectrometer was varied, and measurements were repeated to assess the statistical fluctuations that are typical for arc operation. The results represent a baseline for future studies that aim to include composite cathodes in reactive environments as used for synthesising state-of-the-art hard coatings. C1 [Franz, R.; Wallig, J.; Anders, A.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. [Polcik, P.] PLANSEE Composite Mat, D-86983 Munich, Germany. RP Franz, R (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM rfranz@lbl.gov RI Franz, Robert/G-5263-2010; Anders, Andre/B-8580-2009 OI Franz, Robert/0000-0003-4842-7276; Anders, Andre/0000-0002-5313-6505 FU Erwin Schrdinger Program of the Austrian Science Fund ( FWF) [J3168- N20]; U. S. Department of Energy [DE- AC02- 05CH11231] FX Financial support by the Erwin Schrdinger Program ( Project J3168- N20) of the Austrian Science Fund ( FWF) is highly acknowledged. Work at LBNL is supported by the U. S. Department of Energy under Contract No. DE- AC02- 05CH11231. NR 10 TC 1 Z9 1 U1 1 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1093-2941 BN 978-1-4673-1263-9; 978-1-4673-1265-3 J9 INT SYM DISCH ELECTR PY 2012 BP 541 EP 544 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BEB42 UT WOS:000315985400141 ER PT S AU Savkin, KP Bugaev, AS Nikolaev, AG Oks, EM Kurzina, IA Shandrikov, MV Yushkov, GY Brown, IG AF Savkin, K. P. Bugaev, A. S. Nikolaev, A. G. Oks, E. M. Kurzina, I. A. Shandrikov, M. V. Yushkov, G. Yu. Brown, I. G. GP IEEE TI Decrease of Ceramic Surface Resistance by Implantation Using a Vacuum Arc Metal Ion Source SO 25TH INTERNATIONAL SYMPOSIUM ON DISCHARGES AND ELECTRICAL INSULATION IN VACUUM (ISDEIV 2012) SE International Symposium on Discharges and Electrical Insulation in a Vacuum LA English DT Proceedings Paper CT 25th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) CY SEP 02-07, 2012 CL Tomsk, RUSSIA SP Plansee, Schneider Elect, Tavrida Elect (TEL), MICROSPLAV Co, Appl Elect (AE), DEIS, IEEE, Russian Fdn Basic Res (RFBR), Tomsk State Univ Control Syst & Radioelectronics (TYCYP), Tomsk State Univ, Siberian Branch Russian Acad Sci (SB RAS) ID INSULATORS AB The results of metal ion implantation into alumina ceramic are presented. We show that the of ceramic surface resistivity depends on the metal ion spcies used for the implantation, and decreases with increasing metal ion implantation dose, decreasing by 3 - 4 orders of magnitude from 10(12) Ohm/sq. This approach provides an effective tool for bleeding off accumulated surface charge of ceramic components that can result from interaction with charged particles flows or dielectric polarization. The method can be applied for increasing the maximum electric field hold-off of insulating surfaces in high-voltage devices. C1 [Savkin, K. P.; Bugaev, A. S.; Nikolaev, A. G.; Oks, E. M.; Shandrikov, M. V.; Yushkov, G. Yu.] SB RAS, Inst High Current Elect, 2-3 Akad Skii Ave, Tomsk 634055, Russia. [Kurzina, I. A.] Natl Res Tomsk Polytecn Univ, Tomsk, Russia. [Brown, I. G.] Lawrence Berkeley Natl Lab, Berkeley, CA USA. RP Savkin, KP (reprint author), SB RAS, Inst High Current Elect, 2-3 Akad Skii Ave, Tomsk 634055, Russia. EM savkinkp@mail2000.ru RI Oks, Efim/A-9409-2014; Nikolaev, Alexey/R-2154-2016; Kurzina, Irina/K-1136-2013; Yushkov, Georgy/O-8024-2015; Shandrikov, Maxim/R-2148-2016 OI Oks, Efim/0000-0002-9323-0686; Nikolaev, Alexey/0000-0003-2724-3697; Kurzina, Irina/0000-0003-4976-2295; Yushkov, Georgy/0000-0002-7615-6058; FU RFBR [11- 08- 98006- r] FX This work was supported by joint RFBR No. 11- 08- 98006- r_ Siberia_ a. NR 13 TC 1 Z9 1 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1093-2941 BN 978-1-4673-1263-9; 978-1-4673-1265-3 J9 INT SYM DISCH ELECTR PY 2012 BP 554 EP 557 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BEB42 UT WOS:000315985400145 ER PT S AU Brown, I AF Brown, Ian GP IEEE TI Vacuum arc ion sources: A review SO 25TH INTERNATIONAL SYMPOSIUM ON DISCHARGES AND ELECTRICAL INSULATION IN VACUUM (ISDEIV 2012) SE International Symposium on Discharges and Electrical Insulation in a Vacuum LA English DT Proceedings Paper CT 25th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) CY SEP 02-07, 2012 CL Tomsk, RUSSIA SP Plansee, Schneider Elect, Tavrida Elect (TEL), MICROSPLAV Co, Appl Elect (AE), DEIS, IEEE, Russian Fdn Basic Res (RFBR), Tomsk State Univ Control Syst & Radioelectronics (TYCYP), Tomsk State Univ, Siberian Branch Russian Acad Sci (SB RAS) ID CHARGE-STATE DISTRIBUTIONS; BEAM; IMPLANTATION; FUSION AB The vacuum arc ion source is unique among the arsenal of ion sources available to the experimenter in its capabilities for producing high current beams of metal ions, thereby providing a tool valuable especially for ion implantation and for accelerator injection applications. The source also provides a convenient approach to the investigation of fundamental vacuum arc phenomena via analysis of the ions formed within the metal plasma. First introduced several decades ago, this kind of ion beam generator is by now a relatively mature and widely used technology. Here we review the basic approach to vacuum arc ion source design, source embodiments that have been made and used around the world, their applications in several fields, and the vacuum arc plasma physics that has been explored using this kind of device as a diagnostic tool. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Brown, I (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM IGBrown@LBL.Gov NR 34 TC 1 Z9 1 U1 1 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1093-2941 BN 978-1-4673-1263-9 J9 INT SYM DISCH ELECTR PY 2012 BP 576 EP 579 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BEB42 UT WOS:000315985400151 ER PT J AU Mandelstam, S AF Mandelstam, Stanley BE Cappelli, A Castellani, E Colomo, F DiVecchia, P TI Factorization in dual models and functional integration in string theory SO BIRTH OF STRING THEORY LA English DT Article; Book Chapter ID SCHWARZ SUPERSTRING AMPLITUDES; SPECTRUM-GENERATING ALGEBRA; REGGEIZED RESONANCE MODEL; NO-GHOST THEOREM; RIEMANN SURFACES; QUANTUM GEOMETRY; RAMOND-MODEL; SUPERCONFORMAL INVARIANCE; SCATTERING-AMPLITUDES; MULTILOOP AMPLITUDES C1 [Mandelstam, Stanley] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. [Mandelstam, Stanley] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Mandelstam, S (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. NR 86 TC 1 Z9 1 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND BN 978-0-521-19790-8 PY 2012 BP 294 EP 311 D2 10.1017/CBO9780511977725 PG 18 WC Physics, Multidisciplinary SC Physics GA BDY45 UT WOS:000315654400026 ER PT B AU Bardakci, K Halpern, MB AF Bardakci, Korkut Halpern, Martin B. BE Cappelli, A Castellani, E Colomo, F DiVecchia, P TI The dual quark models SO BIRTH OF STRING THEORY LA English DT Article; Book Chapter ID SINE-GORDON EQUATION; AFFINE LIE-ALGEBRAS; RESONANCE MODELS; FIELD THEORY; THIRRING MODEL; 2 DIMENSIONS; NO TACHYON; CURRENTS; REPRESENTATIONS; FERMIONS AB We briefly recall the historical environment around our 1971 and 1975 constructions of current algebraic internal symmetry on the open string. These constructions included the introduction of world-sheet fermions, the independent discovery of affine Lie algebra in physics (level one of affine su(3)), the first examples of the affine-Sugawara and coset constructions, and finally - from compactified spatial dimensions on the string - the first vertex-operator constructions of the fermions and level one of affine su(n). C1 [Bardakci, Korkut; Halpern, Martin B.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. [Bardakci, Korkut; Halpern, Martin B.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Theoret Phys Grp, Berkeley, CA 94720 USA. RP Bardakci, K (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. NR 56 TC 0 Z9 0 U1 0 U2 0 PU CAMBRIDGE UNIV PRESS PI CAMBRIDGE PA THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND BN 978-0-521-19790-8 PY 2012 BP 393 EP 406 D2 10.1017/CBO9780511977725 PG 14 WC Physics, Multidisciplinary SC Physics GA BDY45 UT WOS:000315654400033 ER PT J AU Fair, JM Taylor-McCabe, KJ Shou, YL Marrone, BL AF Fair, Jeanne M. Taylor-McCabe, Kirsten J. Shou, Yulin Marrone, Babetta L. BE Paul, E TI Immunophenotyping of Avian Lymphocytes IMPLICATIONS AND FUTURE FOR UNDERSTANDING DISEASE IN BIRDS SO EMERGING AVIAN DISEASE SE Studies in Avian Biology LA English DT Article; Book Chapter DE chicken; flow cytometry; Gallus gallus domesticus; host range; immunophenotyping; lymphocytes; West Nile virus ID WEST-NILE-VIRUS; GREATER SAGE-GROUSE; CD8(+) T-CELLS; CENTRAL-NERVOUS-SYSTEM; NORTH-AMERICAN BIRDS; EXPERIMENTAL-INFECTION; BROILER-CHICKENS; ROCK PIGEONS; B-CELLS; ENCEPHALITIS AB Chicken (Gallus gallus domesticus) T-cell populations can be delineated into subsets based on their expression of cell-surface proteins such as cluster of differentiation (CD) cell surface markers. However, immunophenotyping using flow cytometry in birds has focused on cell characterization in the thymus and spleen during development in chickens. West Nile virus (WNV) causes differential infections in birds, ranging the entire spectrum of pathogenesis. In order to accurately assess immunocompetence to diseases such as WNV in birds, more efficient methodology to access natural variability in avian immune function must be devised and understood. Previously, lymphocyte subpopulations CD4(+) and CD8(+) have been found to be critical for clearing infection of WNV in mammals. Focusing on chickens, a species that is susceptible but not infective for WNV, our objectives were to: (1) further develop flow cytometry for estimating subpopulations of lymphocytes in peripheral blood from poultry, (2) estimate the best antibody and cell marker combination for estimating lymphocyte subpopulations, and (3) estimate repeatability and application to other avian species susceptible to WNV. Immunophenotyping of CD3+, CD4+, CD8+, and CD45+ was successfully completed for chicken peripheral blood but not for the Common Raven (Corvus corax) or Black-billed Magpie (Pica hudsonia). Future studies include immunophenotyping during infection studies of WNV in chickens and further development of flow cytometry for other bird species. C1 [Fair, Jeanne M.; Taylor-McCabe, Kirsten J.; Shou, Yulin; Marrone, Babetta L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Fair, JM (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM jmfair@lanl.gov; kjmccab@lanl.gov; shou@lanl.gov; blm@lanl.gov NR 46 TC 0 Z9 0 U1 1 U2 4 PU COOPER ORNITHOLIGICAL SOCIETY PI CAMARILLO PA WESTERN FDN VERTEBRATE ZOOLOGY 439 CALLE SAN PABLO, CAMARILLO, CA 93010 USA BN 978-0-520-95220-1 J9 STUD AVIAN BIOL JI Stud. Avian Biol. PY 2012 IS 42 BP 81 EP 90 PG 10 WC Ornithology SC Zoology GA BDN69 UT WOS:000314056800008 ER PT S AU Holcomb, GR Tylczak, J Meier, GH Jung, KY Mu, N Yanar, N Pettit, F AF Holcomb, G. R. Tylczak, J. Meier, G. H. Jung, K. Y. Mu, N. Yanar, N. Pettit, F. BE Shifler, DA TI Fireside Corrosion in Oxy-Fuel Combustion of Coal SO HIGH TEMPERATURE CORROSION AND MATERIALS CHEMISTRY 9 - A SYMPOSIUM IN HONOR OF PROFESSOR ROBERT A. RAPP SE ECS Transactions LA English DT Proceedings Paper CT Symposium on High Temperature Corrosion and Materials Chemistry 9 in Honor of Robert A. Rapp at the 220th Meeting of the Electrochemical-Society (ECS) CY OCT 09-14, 2011 CL Boston, MA SP Electrochem Soc (ECS), High Temp Mat, Corros ID FE-CR; WATER-VAPOR; OXIDATION; ALLOYS AB Oxy-fuel combustion is based on burning fossil fuels in a mixture of recirculated flue gas and oxygen, rather than in air. An optimized oxy-combustion power plant will have ultra-low emissions since the flue gas that results from oxy-fuel combustion consists almost entirely of CO2 and water vapor. Once the water vapor is condensed, it is relatively easy to sequester the CO2 so that it does not escape into the atmosphere. A variety of laboratory tests comparing air-firing to oxy-firing conditions, and tests examining specific simpler combinations of oxidants, were conducted at 650-700 degrees C. Alloys studied included model Fe-Cr and Ni-Cr alloys, commercial ferritic steels, austenitic steels, and nickel base superalloys. The observed corrosion behavior shows accelerated corrosion even with sulfate additions that remain solid at the tested temperatures, encapsulation of ash components in outer iron oxide scales, and a differentiation between oxy-fuel combustion flue gas recirculation choices. C1 [Holcomb, G. R.; Tylczak, J.] Natl Energy Technol Lab, Albany, OR 97321 USA. [Meier, G. H.; Jung, K. Y.; Mu, N.; Yanar, N.; Pettit, F.] Univ Pittsburgh, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15261 USA. [Meier, G. H.; Jung, K. Y.; Mu, N.; Yanar, N.; Pettit, F.] Natl Energy Technol Lab, Pittsburgh, PA 15236 USA. RP Holcomb, GR (reprint author), Natl Energy Technol Lab, Albany, OR 97321 USA. RI Holcomb, Gordon/G-9070-2013; Tylczak, Joseph/C-7956-2009 OI Holcomb, Gordon/0000-0003-3542-5319; Tylczak, Joseph/0000-0002-0391-2350 NR 8 TC 3 Z9 3 U1 0 U2 12 PU ELECTROCHEMICAL SOC INC PI PENNINGTON PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA SN 1938-5862 BN 978-1-60768-343-8; 978-1-56677-984-5 J9 ECS TRANSACTIONS PY 2012 VL 41 IS 42 BP 73 EP 84 DI 10.1149/1.4718001 PG 12 WC Electrochemistry; Materials Science, Multidisciplinary SC Electrochemistry; Materials Science GA BEB84 UT WOS:000316021500007 ER PT J AU Luo, HM Boll, RA Bell, JR Dai, S AF Luo, H. M. Boll, R. A. Bell, J. R. Dai, S. TI Facile solvent extraction separation of Th-227 and Ac-225 based on room-temperature ionic liquids SO RADIOCHIMICA ACTA LA English DT Article DE Thorium; Actinium; Solvent extraction; Ionic liquids ID CROWN-ETHERS; METAL-IONS; AQUEOUS-SOLUTIONS; SR2+; CS+; ACTINIDES; GENERATOR; GREENNESS; MECHANISM; BI-213 AB New separation methodologies for radioisotopes are crucial to many medical applications. In this work, the solvent extraction of Th-227 and Ac-225 based on ionic liquids (ILs) was investigated using N ,N ,N' ,N'-tetraoctyldiglycolamide (TODGA) or di(2-ethylhexyl)phosphoric acid (HDEHP) as an extractant. Four ILs, 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([C(4)mim][NTf2]), 1-butyl-3-methylimidazolium bis(perfluoroethanesulfonyl)imide ([C(4)mim][BETI]), 1-butyl-2,3-trimethyleneimidazolium (trifluoromethanesulfonyl)imide ([BuI5][ NTf2]), and 1-benzyl pyridinium bis(trifluoromethanesulfonyl)imide ([PhCH2Py][NTf2]) with different cation or anion structural features were used as diluents for the separation of Th-227 and Ac-225. Excellent extraction efficiencies and selectivities were found for Th-227/Ac-225 when HDEHP was used as an extractant in these ILs. The effects of different extractant concentrations in ILs and different aqueous phase acidities on extraction efficiencies and selectivities of Th-227/Ac-225 are also presented. The success in separation of Th-227 and Ac-225 isotopes highlights great potentials of use of ionic liquids in isotope production. C1 [Luo, H. M.; Bell, J. R.] Oak Ridge Natl Lab, Energy & Transportat Sci Div, Oak Ridge, TN 37831 USA. [Boll, R. A.] Oak Ridge Natl Lab, Fuel Cycle & Isotopes Div, Oak Ridge, TN 37831 USA. [Dai, S.] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Luo, HM (reprint author), Oak Ridge Natl Lab, Energy & Transportat Sci Div, Oak Ridge, TN 37831 USA. EM luoh@ornl.gov RI Boll, Rose/C-4138-2016; Dai, Sheng/K-8411-2015 OI Boll, Rose/0000-0003-2507-4834; Dai, Sheng/0000-0002-8046-3931 FU Office of Nuclear Physics, Office of Science, US Department of Energy; Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences [DE-AC05-0096OR22725]; Oak Ridge National Laboratory; Oak Ridge Associated Universities (ORAU) FX HML and RAB were supported by the Office of Nuclear Physics, Office of Science, US Department of Energy. JRB and SD were sponsored by the Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences under Contract DE-AC05-0096OR22725 with Oak Ridge National Laboratory, managed by UT-Battelle, LLC. JRB acknowledges the Oak Ridge Associated Universities (ORAU) for a postdoctoral fellowship. NR 35 TC 2 Z9 3 U1 1 U2 38 PU OLDENBOURG VERLAG PI MUNICH PA LEKTORAT MINT, POSTFACH 80 13 60, D-81613 MUNICH, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 2012 VL 100 IS 10 BP 772 EP 778 DI 10.1524/ract.2012.1950 PG 7 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 105JJ UT WOS:000316063800005 ER PT J AU Mahmassani, HS Hou, T Dong, J AF Mahmassani, Hani S. Hou, Tian Dong, Jing TI Characterizing Travel Time Variability in Vehicular Traffic Networks Deriving a Robust Relation for Reliability Analysis SO TRANSPORTATION RESEARCH RECORD LA English DT Article AB Modeling travel time reliability requires characterizing travel time distributions. Two key statistics commonly used to describe a distribution are the mean deviation and the standard deviation, with one depicting the central tendency and the other describing the dispersion. Although the mean travel time is easier to measure and predict, the corresponding standard deviation is usually hard to obtain because of the insufficiency of individual trip data. Building on seminal insight that goes back to Herman and Prigogine's kinetic theory, this study explores a robust characterization of travel time variability that provides for a near-linear relation between the standard deviation of travel time per unit distance and the corresponding mean value. Simulation-generated vehicle trajectory data from three road networks are used to explore this relationship. On the basis of multiscale and multilevel analysis, large amounts of data show that these two quantities are highly positively correlated; that is, the dispersion of the distribution of individual travel time per unit distance increases with increasing value, of the mean travel time per unit distance. Furthermore, regression models and statistical testing indicate that this relation is linear or near-linear. The relation is also validated by Global Positioning System probe data from the Seattle, Washington, area. This relation provides a robust basis for predicting the standard deviation per unit distance when the mean value is known and thus for characterizing the reliability of travel in a network in strategic and operational studies. C1 [Mahmassani, Hani S.; Hou, Tian] Northwestern Univ, Dept Civil Engn, Evanston, IL 60208 USA. [Dong, Jing] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Mahmassani, HS (reprint author), Northwestern Univ, Dept Civil Engn, 215 Chambers Hall,600 Foster St, Evanston, IL 60208 USA. EM masmah@northwestern.edu RI Mahmassani, Hani/B-7029-2009 FU second Strategic Highway Research Program (SHRP 2) Reliability Area Project, Incorporating Reliability Performance Measures in Operations and Planning Modeling Tools [L04]; National Science Foundation Civil Infrastructure Systems Division Award; Road Weather Management Program of FHWA, U.S. Department of Transportation FX This paper is based on research conducted under funding from the second Strategic Highway Research Program (SHRP 2) Reliability Area Project L04, Incorporating Reliability Performance Measures in Operations and Planning Modeling Tools; the National Science Foundation Civil Infrastructure Systems Division Award; and the Road Weather Management Program of FHWA, U.S. Department of Transportation. The authors are grateful for the contributions of Jiwon Kim, Lan Jiang, Omer Verbas, and All Zockaie Kheiraie, who contributed to various aspects of the work, particularly network building and calibration. This work benefited considerably from valuable discussions with William Hyman and Steven Anderle of SHRP 2, Peter Vovsha of PB Associates, Mark Bradley, and Yannis Stogios of Delcan, Inc. NR 27 TC 12 Z9 12 U1 0 U2 8 PU NATL ACAD SCIENCES PI WASHINGTON PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA SN 0361-1981 J9 TRANSPORT RES REC JI Transp. Res. Record PY 2012 IS 2315 BP 141 EP 152 DI 10.3141/2315-15 PG 12 WC Engineering, Civil; Transportation; Transportation Science & Technology SC Engineering; Transportation GA 106TI UT WOS:000316167200016 ER PT S AU Bartlett, RA Heroux, MA Willenbring, JM AF Bartlett, Roscoe A. Heroux, Michael A. Willenbring, James M. GP IEEE TI Overview of the TriBITS Lifecycle Model A Lean/Agile Software Lifecycle Model for Research-based Computational Science and Engineering Software SO 2012 IEEE 8TH INTERNATIONAL CONFERENCE ON E-SCIENCE (E-SCIENCE) SE Proceeding IEEE International Conference on e-Science (e-Science) LA English DT Proceedings Paper CT IEEE 8th International Conference on E-Science (e-Science) CY OCT 08-12, 2012 CL Chicago, IL SP IEEE, IEEE Comp Soc AB Software lifecycles are becoming an increasingly important issue for computational science & engineering (CSE) software. The process by which a piece of CSE software begins life as a set of research requirements and then matures into a trusted high-quality capability is both commonplace and extremely challenging. Although an implicit lifecycle is obviously being used in any effort, the challenges of this process-respecting the competing needs of research vs. production-cannot be overstated. Here we describe a proposal for a well-defined software lifecycle process based on modern Lean/Agile software engineering principles. What we propose is appropriate for many CSE software projects that are initially heavily focused on research but also are expected to eventually produce usable high-quality capabilities. The model is related to TriBITS, a build, integration and testing system, which serves as a strong foundation for this lifecycle model, and aspects of this lifecycle model are ingrained in the TriBITS system. Indeed this lifecycle process, if followed, will enable large-scale sustainable integration of many complex CSE software efforts across several institutions. C1 [Bartlett, Roscoe A.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Bartlett, RA (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. EM bartlettra@.ornl.gov RI Willenbring, Jane/B-6431-2011 OI Willenbring, Jane/0000-0003-2722-9537 NR 16 TC 0 Z9 0 U1 0 U2 7 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2325-372X BN 978-1-4673-4466-1 J9 P IEEE INT C E-SCI PY 2012 PG 8 WC Computer Science, Interdisciplinary Applications; Computer Science, Theory & Methods SC Computer Science GA BDW61 UT WOS:000315360600038 ER PT S AU Choi, JY Abbasi, H Pugmire, D Podhorszki, N Klasky, S Capdevila, C Parashar, M Wolf, M Qiu, J Fox, G AF Choi, Jong Youl Abbasi, Hasan Pugmire, David Podhorszki, Norbert Klasky, Scott Capdevila, Cristian Parashar, Manish Wolf, Matthew Qiu, Judy Fox, Geoffrey GP IEEE TI Mining Hidden Mixture Context With ADIOS-P To Improve Predictive Pre-fetcher Accuracy SO 2012 IEEE 8TH INTERNATIONAL CONFERENCE ON E-SCIENCE (E-SCIENCE) SE Proceeding IEEE International Conference on e-Science (e-Science) LA English DT Proceedings Paper CT IEEE 8th International Conference on E-Science (e-Science) CY OCT 08-12, 2012 CL Chicago, IL SP IEEE, IEEE Comp Soc DE prefetch; hidden context mining ID LATENT SEMANTIC ANALYSIS; OPTIMIZATION; ENVIRONMENT; ALGORITHM AB Predictive pre-fetcher, which predicts future data access events and loads the data before users requests, has been widely studied, especially in file systems or web contents servers, to reduce data load latency. Especially in scientific data visualization, pre-fetching can reduce the IO waiting time. In order to increase the accuracy, we apply a data mining technique to extract hidden information. More specifically, we apply a data mining technique for discovering the hidden contexts in data access patterns and make prediction based on the inferred context to boost the accuracy. In particular, we performed Probabilistic Latent Semantic Analysis (PLSA), a mixture model based algorithm popular in the text mining area, to mine hidden contexts from the collected user access patterns and, then, we run a predictor within the discovered context. We further improve PLSA by applying the Deterministic Annealing (DA) method to overcome the local optimum problem. In this paper we demonstrate how we can apply PLSA and DA optimization to mine hidden contexts from users data access patterns and improve predictive pre-fetcher performance. C1 [Choi, Jong Youl; Abbasi, Hasan; Pugmire, David; Podhorszki, Norbert; Klasky, Scott] Oak Ridge Natl Lab, Sci Data Grp, Oak Ridge, TN 37831 USA. RP Choi, JY (reprint author), Oak Ridge Natl Lab, Sci Data Grp, Oak Ridge, TN 37831 USA. EM choij@ornl.gov; habbasi@ornl.gov; pugmire@ornl.gov; pnorbert@ornl.gov; klasky@ornl.gov; ccapdevi@utk.edu; parashar@rutgers.edu; mwolf@cc.gatech.edu; xqiu@indiana.edu; gcf@indiana.edu NR 39 TC 0 Z9 0 U1 0 U2 8 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2325-372X BN 978-1-4673-4466-1; 978-1-4673-4467-8 J9 P IEEE INT C E-SCI PY 2012 PG 8 WC Computer Science, Interdisciplinary Applications; Computer Science, Theory & Methods SC Computer Science GA BDW61 UT WOS:000315360600008 ER PT S AU De Carlo, F Xiao, XH Fezzaa, K Wang, S Schwarz, N Jacobsen, C Chawla, N Fusseis, F AF De Carlo, Francesco Xiao, Xianghui Fezzaa, Kamel Wang, Steve Schwarz, Nicholas Jacobsen, Chris Chawla, Nikhilesh Fusseis, Florian GP IEEE TI Data intensive science at synchrotron based 3D x-ray imaging facilities SO 2012 IEEE 8TH INTERNATIONAL CONFERENCE ON E-SCIENCE (E-SCIENCE) SE Proceeding IEEE International Conference on e-Science (e-Science) LA English DT Proceedings Paper CT IEEE 8th International Conference on E-Science (e-Science) CY OCT 08-12, 2012 CL Chicago, IL SP IEEE, IEEE Comp Soc DE Data processing; tomography; x-ray imaging AB New developments in detector technology allow the acquisition of micrometer-resolution x-ray transmission images of specimens as large as a few millimeters at unprecedented frame rates. The high x-ray flux density generated by the Advanced Photon Source (APS) allows for detector exposure times ranging from hundreds of milliseconds to 150 picoseconds. The synchronization of the camera with the rotation stage allows a full 3D dataset to be acquired in less than one second. The micro and nano tomography systems available at the x-ray imaging beamlines of the APS are routinely used in material science and geoscience applications where high-resolution and fast 3D imaging are instrumental in extracting in situ four-dimensional dynamic information. C1 [De Carlo, Francesco; Xiao, Xianghui; Fezzaa, Kamel; Wang, Steve; Schwarz, Nicholas; Jacobsen, Chris] Argonne Natl Lab, Argonne, IL 60439 USA. RP De Carlo, F (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Jacobsen, Chris/E-2827-2015; Fusseis, Florian/M-5321-2016 OI Jacobsen, Chris/0000-0001-8562-0353; Fusseis, Florian/0000-0002-3104-8109 NR 3 TC 0 Z9 0 U1 0 U2 6 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2325-372X BN 978-1-4673-4466-1 J9 P IEEE INT C E-SCI PY 2012 PG 3 WC Computer Science, Interdisciplinary Applications; Computer Science, Theory & Methods SC Computer Science GA BDW61 UT WOS:000315360600058 ER PT S AU Farnsworth, R Benes, S AF Farnsworth, Richard Benes, Scott GP IEEE TI IRMIS: The care and feeding of a generalized relatively relational database for accelerator components with a connection to the real time EPICS Input output controllers SO 2012 IEEE 8TH INTERNATIONAL CONFERENCE ON E-SCIENCE (E-SCIENCE) SE Proceeding IEEE International Conference on e-Science (e-Science) LA English DT Proceedings Paper CT IEEE 8th International Conference on E-Science (e-Science) CY OCT 08-12, 2012 CL Chicago, IL SP IEEE, IEEE Comp Soc DE component; relational database; acclerator; light source; synchrotron; EPICS AB IRMIS: The care and feeding of a generalized relatively relational database for accelerator components with a connection to the real time EPICS Input output controllers. This paper describes a relational database approach to documenting and maintaining; the feeding. It describes the automated process used to generate accelerator or synchrotron component data for the relational tables and the role of devices and components. The data this obtained turn may be used or presented in a variety of ways to the end use in order to either optimize the maintenance or to provide machine metadata for experimental performance purposes. C1 [Farnsworth, Richard; Benes, Scott] Argonne Natl Labs, Adv Photon Source, Argonne, IL USA. RP Farnsworth, R (reprint author), Argonne Natl Labs, Adv Photon Source, Argonne, IL USA. EM rif@aps.anl.gov NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2325-372X BN 978-1-4673-4466-1; 978-1-4673-4467-8 J9 P IEEE INT C E-SCI PY 2012 PG 3 WC Computer Science, Interdisciplinary Applications; Computer Science, Theory & Methods SC Computer Science GA BDW61 UT WOS:000315360600059 ER PT S AU Narayanan, S Madden, TJ Sandy, AR Kettimuthu, R Link, M AF Narayanan, S. Madden, T. J. Sandy, A. R. Kettimuthu, Raj Link, Michael GP IEEE TI GridFTP based real-time data movement architecture for x-ray photon correlation spectroscopy at the Advanced Photon Source SO 2012 IEEE 8TH INTERNATIONAL CONFERENCE ON E-SCIENCE (E-SCIENCE) SE Proceeding IEEE International Conference on e-Science (e-Science) LA English DT Proceedings Paper CT IEEE 8th International Conference on E-Science (e-Science) CY OCT 08-12, 2012 CL Chicago, IL SP IEEE, IEEE Comp Soc DE Big Data; GridFTP; High Performance Computing; X-ray Photon Correlation Spectroscopy; Synchrotron ID SCATTERING AB X-ray photon correlation spectroscopy (XPCS) is a unique tool to study the dynamical properties in a wide range of materials over a wide spatial and temporal range. XPCS measures the correlated changes in the speckle pattern, produced when a coherent x-ray beam is scattered from a disordered sample, over a time series of area detector images. The technique rides on "Big Data" and relies heavily on high performance computing (HPC) techniques. In this paper, we propose a highspeed data movement architecture for moving data within the Advanced Photon Source (APS) as well as between APS and the users' institutions. We describe the challenges involved in the internal data movement and a GridFTP-based solution that enables more efficient usage of the APS beam time. The implementation of GridFTP plugin as part of the data acquisition system at the Advanced Photon Source for real time data transfer to the HPC system for data analysis is discussed. C1 [Narayanan, S.; Madden, T. J.; Sandy, A. R.] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Narayanan, S (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. EM sureshn@aps.anl.gov; kettimut@mcs.anl.gov NR 20 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2325-372X BN 978-1-4673-4466-1; 978-1-4673-4467-8 J9 P IEEE INT C E-SCI PY 2012 PG 8 WC Computer Science, Interdisciplinary Applications; Computer Science, Theory & Methods SC Computer Science GA BDW61 UT WOS:000315360600056 ER PT S AU Samak, T Gunter, D Wang, Z AF Samak, Taghrid Gunter, Dan Wang, Zhong GP IEEE TI Prediction of Protein Solubility in E. coli SO 2012 IEEE 8TH INTERNATIONAL CONFERENCE ON E-SCIENCE (E-SCIENCE) SE Proceeding IEEE International Conference on e-Science (e-Science) LA English DT Proceedings Paper CT IEEE 8th International Conference on E-Science (e-Science) CY OCT 08-12, 2012 CL Chicago, IL SP IEEE, IEEE Comp Soc ID SEQUENCE-BASED PREDICTION; MACHINE-BASED METHOD; ESCHERICHIA-COLI; OVEREXPRESSION; PROPENSITY AB Gene synthesis is a key step to convert digitally predicted proteins to functional proteins. However, it is a relatively expensive and labor-intensive process. About 30-50% of the synthesized proteins are not soluble, thereby further reduces the efficacy of gene synthesis as a method for protein function characterization. Solubility prediction from primary protein sequences holds the promise to dramatically reduce the cost of gene synthesis. This work presents a framework that creates models of solubility from sequence information. From the primary protein sequences of the genes to be synthesized, sequence features can be used to build computational models for solubility. This way, biologists can focus the effort on synthesizing genes that are highly likely to generate soluble proteins. We have developed a framework that employs several machine learning algorithms to model protein solubility. The framework is used to predict protein solubility in the Escherichia coli expression system. The analysis is performed on over 1,600 quantified proteins. The approach successfully predicted the solubility with more than 80% accuracy, and enabled in depth analysis of the most important features affecting solubility. The analysis pipeline is general and can be applied to any set of sequence features to predict any binary measure. The framework also provides the biologist with a comprehensive comparison between different learning algorithms, and insightful feature analysis. C1 [Samak, Taghrid; Gunter, Dan; Wang, Zhong] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Samak, T (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. NR 11 TC 0 Z9 0 U1 1 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2325-372X BN 978-1-4673-4466-1 J9 P IEEE INT C E-SCI PY 2012 PG 8 WC Computer Science, Interdisciplinary Applications; Computer Science, Theory & Methods SC Computer Science GA BDW61 UT WOS:000315360600006 ER PT S AU Sulakhe, D Kettimuthu, R Dave, U AF Sulakhe, Dinanath Kettimuthu, Rajkumar Dave, Utpal GP IEEE TI High-Performance Data Management for Genome Sequencing Centers Using Globus Online: A Case Study SO 2012 IEEE 8TH INTERNATIONAL CONFERENCE ON E-SCIENCE (E-SCIENCE) SE Proceeding IEEE International Conference on e-Science (e-Science) LA English DT Proceedings Paper CT IEEE 8th International Conference on E-Science (e-Science) CY OCT 08-12, 2012 CL Chicago, IL SP IEEE, IEEE Comp Soc DE Globus; Globus Online; GridFTP; sequencing center; data transfer; data management; grid; cloud; next-gen sequencing; translational medicine ID FRAMEWORK AB In the past few years in the biomedical field, availability of low-cost sequencing methods in the form of next-generation sequencing has revolutionized the approaches life science researchers are undertaking in order to gain a better understanding of the causative factors of diseases. With biomedical researchers getting many of their patients' DNA and RNA sequenced, sequencing centers are working with hundreds of researchers with terabytes to petabytes of data for each researcher. The unprecedented scale at which genomic sequence data is generated today by high-throughput technologies requires sophisticated and high-performance methods of data handling and management. For the most part, however, the state of the art is to use hard disks to ship the data. As data volumes reach tens or even hundreds of terabytes, such approaches become increasingly impractical. Data stored on portable media can be easily lost, and typically is not readily accessible to all members of the collaboration. In this paper, we discuss the application of Globus Online within a sequencing facility to address the data movement and management challenges that arise as a result of exponentially increasing amount of data being generated by a rapidly growing number of research groups. We also present the unique challenges in applying a Globus Online solution in sequencing center environments and how we overcome those challenges. C1 [Sulakhe, Dinanath; Kettimuthu, Rajkumar; Dave, Utpal] Argonne Natl Lab, Computat Inst, Chicago, IL 60637 USA. RP Sulakhe, D (reprint author), Argonne Natl Lab, Computat Inst, Chicago, IL 60637 USA. EM sulakhe@mcs.anl.gov; kettimut@mcs.anl.gov; dave@ci.uchicago.edu NR 22 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2325-372X BN 978-1-4673-4466-1 J9 P IEEE INT C E-SCI PY 2012 PG 6 WC Computer Science, Interdisciplinary Applications; Computer Science, Theory & Methods SC Computer Science GA BDW61 UT WOS:000315360600033 ER PT S AU Tierney, B Kissel, E Swany, M Pouyoul, E AF Tierney, Brian Kissel, Ezra Swany, Martin Pouyoul, Eric GP IEEE TI Efficient Data Transfer Protocols for Big Data SO 2012 IEEE 8TH INTERNATIONAL CONFERENCE ON E-SCIENCE (E-SCIENCE) SE Proceeding IEEE International Conference on e-Science (e-Science) LA English DT Proceedings Paper CT IEEE 8th International Conference on E-Science (e-Science) CY OCT 08-12, 2012 CL Chicago, IL SP IEEE, IEEE Comp Soc ID PERFORMANCE; TCP AB Data set sizes are growing exponentially, so it is important to use data movement protocols that are the most efficient available. Most data movement tools today rely on TCP over sockets, which limits flows to around 20Gbps on today's hardware. RDMA over Converged Ethernet (RoCE) is a promising new technology for high-performance network data movement with minimal CPU impact over circuit-based infrastructures. We compare the performance of TCP, UDP, UDT, and RoCE over high latency 10Gbps and 40Gbps network paths, and show that RoCE-based data transfers can fill a 40Gbps path using much less CPU than other protocols. We also show that the Linux zero-copy system calls can improve TCP performance considerably, especially on current Intel "Sandy Bridge"-based PCI Express 3.0 (Gen3) hosts. C1 [Tierney, Brian; Pouyoul, Eric] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94270 USA. RP Tierney, B (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94270 USA. NR 24 TC 0 Z9 0 U1 2 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2325-372X BN 978-1-4673-4466-1; 978-1-4673-4467-8 J9 P IEEE INT C E-SCI PY 2012 PG 9 WC Computer Science, Interdisciplinary Applications; Computer Science, Theory & Methods SC Computer Science GA BDW61 UT WOS:000315360600052 ER PT S AU van Dam, KK Carson, J Corrigan, A Einstein, D Guillen, Z Heath, B Kuprat, A Lanekoff, I Lansing, C Laskin, J Li, DS Liu, Y Marshall, M Miller, E Orr, G da Silva, PP Ryu, S Szymanski, C Thomas, M AF van Dam, Kerstin Kleese Carson, James Corrigan, Abigail Einstein, Daniel Guillen, Zoe Heath, Brandi Kuprat, Andrew Lanekoff, Ingela Lansing, Carina Laskin, Julia Li, Dongsheng Liu, Yan Marshall, Matthew Miller, Erin Orr, Galya da Silva, Paulo Pinheiro Ryu, Seun Szymanski, Craig Thomas, Mathew GP IEEE TI Velo and REXAN - Integrated Data Management and High Speed Analysis for Experimental Facilities SO 2012 IEEE 8TH INTERNATIONAL CONFERENCE ON E-SCIENCE (E-SCIENCE) SE Proceeding IEEE International Conference on e-Science (e-Science) LA English DT Proceedings Paper CT IEEE 8th International Conference on E-Science (e-Science) CY OCT 08-12, 2012 CL Chicago, IL SP IEEE, IEEE Comp Soc DE Data management; high-throughput analysis; analysis framework; collaborative environment ID STATISTICAL CONTINUUM THEORY; GENE-EXPRESSION DATA; MOUSE-BRAIN; EFFECTIVE CONDUCTIVITY; RECONSTRUCTION; SIMULATIONS; SEGMENTATION; REGISTRATION; FRAMEWORK; IMAGES AB The Chemical Imaging Initiative at the Pacific Northwest National Laboratory (PNNL) is creating a 'Rapid Experimental Analysis' (REXAN) Framework, based on the concept of reusable component libraries. REXAN allows developers to quickly compose and customize high throughput analysis pipelines for a range of experiments, as well as supporting the creation of multi-modal analysis pipelines. In addition, PNNL has coupled REXAN with its collaborative data management and analysis environment Velo to create an easy to use data management and analysis environments for experimental facilities. This paper will discuss the benefits of Velo and REXAN in the context of three examples: PNNL High Resolution Mass Spectrometry - reducing analysis times from hours to seconds, and enabling the analysis of much larger data samples (100KB to 40GB) at the same time. ALS X-Ray Tomography - reducing analysis times of combined STXM and EM data collected at the ALS from weeks to minutes, decreasing manual work and increasing data volumes that can be analysed in a single step. Multi-modal nano-scale analysis of STXM and TEM data - providing a semi automated process for particle detection. The creation of REXAN has significantly shortened the development time for these analysis pipelines. The integration of Velo and REXAN has significantly increased the scientific productivity of the instruments and their users by creating easy to use data management and analysis environments with greatly reduced analysis times and improved analysis capabilities. C1 [van Dam, Kerstin Kleese; Carson, James; Corrigan, Abigail; Einstein, Daniel; Guillen, Zoe; Heath, Brandi; Kuprat, Andrew; Lanekoff, Ingela; Lansing, Carina; Laskin, Julia; Li, Dongsheng; Liu, Yan; Marshall, Matthew; Miller, Erin; Orr, Galya; da Silva, Paulo Pinheiro; Ryu, Seun; Szymanski, Craig; Thomas, Mathew] Pacific NW Natl Lab, Richland, WA 99352 USA. RP van Dam, KK (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. RI Laskin, Julia/H-9974-2012 OI Laskin, Julia/0000-0002-4533-9644 NR 51 TC 0 Z9 0 U1 1 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2325-372X BN 978-1-4673-4466-1; 978-1-4673-4467-8 J9 P IEEE INT C E-SCI PY 2012 PG 9 WC Computer Science, Interdisciplinary Applications; Computer Science, Theory & Methods SC Computer Science GA BDW61 UT WOS:000315360600053 ER PT S AU Arham, HZ Hunt, CR Park, WK Gillett, J Das, SD Sebastian, SE Xu, ZJ Wen, JS Lin, ZW Li, Q Gu, G Thaler, A Budko, SL Canfield, PC Greene, LH AF Arham, H. Z. Hunt, C. R. Park, W. K. Gillett, J. Das, S. D. Sebastian, S. E. Xu, Z. J. Wen, J. S. Lin, Z. W. Li, Q. Gu, G. Thaler, A. Budko, S. L. Canfield, P. C. Greene, L. H. GP IOP TI Gap-like feature in the normal state of X(Fe1-xCox)(2)As-2, X = Ba, Sr and Fe1+yTe revealed by Point Contact Spectroscopy SO 26TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT26), PTS 1-5 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 26th International Conference on Low Temperature Physics (LT) CY AUG 10-17, 2011 CL Beijing, PEOPLES R CHINA ID ANDREEV REFLECTION SPECTROSCOPY; DETWINNED BA(FE1-XCOX)(2)AS-2; IRON PNICTIDES; SUPERCONDUCTORS; ANISOTROPY; SYMMETRY AB Point contact spectroscopy reveals a gap-like feature above the magnetic and structural transition temperatures for underdoped Ba(Fe1-xCox)(2)As-2, SrFe2As2 and Fe1+yTe. The conductance spectrum starts showing an enhancement at temperatures as high as 177 K for BaFe2As2 (T-N similar to 132 K) and 250 K for SrFe2As2 (T-N similar to 192 K). Possible origins for this enhancement are discussed in light of recent experimental claims of nematicity in these materials. We construct a modified phase diagram for Co-doped Ba122 showing a gap-like feature existing above T-N and T-S for the underdoped regime. C1 [Arham, H. Z.; Hunt, C. R.; Park, W. K.; Greene, L. H.] Univ Illinois, Dept Phys, Urbana, IL 61801 USA. [Gillett, J.; Das, S. D.; Sebastian, S. E.] Univ Cambridge, Cavendish Lab, Cambridge CB2 1TN, England. [Xu, Z. J.; Wen, J. S.; Lin, Z. W.; Li, Q.; Gu, G.] Condensed Matter Phys & Mat Sci Dept, Brookhaven Natl Lab, Upton, NY 11973 USA. [Thaler, A.; Budko, S. L.; Canfield, P. C.] Ames Lab & Dept Phys & Astron, Iowa State Univ, Ames, IA 50011 USA. RP Arham, HZ (reprint author), Univ Illinois, Dept Phys, Urbana, IL 61801 USA. EM arham1@illinois.edu RI Wen, Jinsheng/F-4209-2010; Canfield, Paul/H-2698-2014; Thaler, Alexander/J-5741-2014 OI Wen, Jinsheng/0000-0001-5864-1466; Thaler, Alexander/0000-0001-5066-8904 FU Center for Emergent Superconductivity; Energy Frontier Research Center - US DOE [DE-ACO298CH1088]; U.S. DOE [ACO298CH10886]; EPSRC; Trinity College; Royal Society; Commonwealth Trust; ISU under DOE [DE-ACO2-07CH11358] FX This is work supported by the Center for Emergent Superconductivity, an Energy Frontier Research Center funded by the US DOE Award No. DE-ACO298CH1088. The work at BNL is carried out under U.S. DOE Award No. DE-ACO298CH10886. University of Cambridge is supported by EPSRC, Trinity College, the Royal Society and the Commonwealth Trust. Ames Lab is operated by ISU under DOE Contract No. DE-ACO2-07CH11358. NR 46 TC 3 Z9 3 U1 1 U2 18 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 400 AR UNSP 022001 DI 10.1088/1742-6596/400/2/022001 PG 6 WC Physics, Applied; Physics, Multidisciplinary; Physics, Condensed Matter SC Physics GA BDU76 UT WOS:000314977100089 ER PT S AU Fujita, K Mesaros, A Kim, EA Lawler, MJ Sachdev, S Zaanen, J Eisaki, H Uchida, S Davis, JC AF Fujita, K. Mesaros, A. Kim, E-A Lawler, M. J. Sachdev, S. Zaanen, J. Eisaki, H. Uchida, S. Davis, J. C. GP IOP TI Spectroscopic Imaging STM studies of broken electronic symmetries in underdoped cuprates SO 26TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT26), PTS 1-5 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 26th International Conference on Low Temperature Physics (LT) CY AUG 10-17, 2011 CL Beijing, PEOPLES R CHINA ID BI2SR2CACU2O8+DELTA; STATES AB We use spectroscopic imaging scanning tunneling microscopy (SI-STM) to visualize the spatial symmetries of the electronic states that occur at the pseudogap energy scale in underdoped cuprates. We find evidence for the intra-unit-cell electronic nematicity - by which we mean the breaking of C4v symmetry within each CuO2 unit cell[1]. We also find that the coexisting incommensurate (smectic) electronic modulations couple to the intra-unit-cell nematicity through their 2 pi topological defects[2]. C1 [Fujita, K.; Kim, E-A; Lawler, M. J.; Davis, J. C.] Cornell Univ, Dept Phys, LASSP, Ithaca, NY 14853 USA. [Fujita, K.; Davis, J. C.] Brookhaven Natl Lab, CMPMS Dept, Upton, NY 11973 USA. [Fujita, K.; Uchida, S.] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan. [Mesaros, A.; Zaanen, J.] Leiden Univ, Inst Lorentz Theoret Phys, Leiden, Netherlands. [Lawler, M. J.] Binghamton Univ, Dept Phys, Appl Phys & Astron, Binghamton, NY 13902 USA. [Sachdev, S.] Harvard Univ, Dept Phys, Boston, MA 02138 USA. [Eisaki, H.] Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan. [Davis, J. C.] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland. RP Fujita, K (reprint author), Cornell Univ, Dept Phys, LASSP, Ithaca, NY 14853 USA. EM fujita@ccmr.cornell.edu RI Lawler, Michael/K-6770-2012 OI Lawler, Michael/0000-0002-2319-2274 NR 11 TC 0 Z9 0 U1 0 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 400 AR UNSP 022022 DI 10.1088/1742-6596/400/2/022022 PG 5 WC Physics, Applied; Physics, Multidisciplinary; Physics, Condensed Matter SC Physics GA BDU76 UT WOS:000314977100110 ER PT S AU Furukawa, Y Micotti, E Lascialfari, A Borsa, F Kumagai, K Fang, XK Kogerler, P AF Furukawa, Yuji Micotti, Edoardo Lascialfari, Alessandro Borsa, Ferdinando Kumagai, Ken-ichi Fang, Xikui Koegerler, Paul GP IOP TI Spin freezing in geometrically frustrated magnetic molecule Fe-30 revealed by NMR SO 26TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT26), PTS 1-5 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 26th International Conference on Low Temperature Physics (LT) CY AUG 10-17, 2011 CL Beijing, PEOPLES R CHINA AB Static and dynamical properties of Fe3+ (3d(5); S = 5/2) spins in geometrically frustrated magnetic molecule Fe30 have been investigated by nuclear magnetic resonance (NMR) in the temperature range T = 0.1 - 300 K. From a measurement of nuclear spin-lattice relaxation rates as a function of temperature, the fluctuation frequency of Fe3+ spins is found to decrease with decreasing temperature, indicating spin freezing at low temperatures. C1 [Furukawa, Yuji; Borsa, Ferdinando; Fang, Xikui; Koegerler, Paul] Iowa State Univ, Ames Lab, Ames, IA 50011 USA. [Micotti, Edoardo; Lascialfari, Alessandro; Borsa, Ferdinando] Univ Pavia, Departmento Fis Volta, I-27100 Pavia, Italy. [Lascialfari, Alessandro] Univ Milan, Ist Fisiologia Generale Chim Biolog, I-20122 Milan, Italy. [Furukawa, Yuji; Kumagai, Ken-ichi] Hokkaido Univ, Dept Phys, Sapporo, Hokkaido 060, Japan. [Koegerler, Paul] Rhein Westfal TH Aachen, Inst Inorgan Chem, D-52074 Aachen, Germany. RP Furukawa, Y (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. EM furukawa@ameslab.gov FU Office of Basic Energy Science; [DE-ACO2-07CH11358] FX Ames Laboratory is operated for U.S. Department of Energy by Iowa State University under Contract No. DE-ACO2-07CH11358. This work at Ames Laboratory was supported by the Office of Basic Energy Science. NR 13 TC 1 Z9 1 U1 1 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 400 AR UNSP 032012 DI 10.1088/1742-6596/400/3/032012 PG 4 WC Physics, Applied; Physics, Multidisciplinary; Physics, Condensed Matter SC Physics GA BDU76 UT WOS:000314977100246 ER PT S AU Kalok, D Bilusic, A Baturina, TI Mironov, AY Postolova, SV Gutakovskii, AK Latyshev, AV Vinokur, VM Strunk, C AF Kalok, D. Bilusic, A. Baturina, T. I. Mironov, A. Yu Postolova, S. V. Gutakovskii, A. K. Latyshev, A. V. Vinokur, V. M. Strunk, C. GP IOP TI Non-linear conduction in the critical region of the superconductor-insulator transition in TiN thin films SO 26TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT26), PTS 1-5 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 26th International Conference on Low Temperature Physics (LT) CY AUG 10-17, 2011 CL Beijing, PEOPLES R CHINA ID QUANTUM; ARRAYS AB We investigate experimentally electric transport at both the superconducting and insulating sides of the superconductor to insulator transition in TiN thin films. Relatively deeply on the superconducting side we find sharp transitions of R(T) to a zero-resistance state. Near the transition temperature the current-voltage I(V)-characteristics develops power-law type of non-linearity even for low currents. Close to the transition the superconducting state is destroyed by small magnetic fields and develops into an insulator with a thermally activated conductance. At low temperatures and low bias voltage we observe I proportional to V-alpha dependences in the insulating state with an exponent alpha rapidly growing with decreasing temperature. This behavior is strikingly similar to the V(I)'s observed in the superconducting state, if I and V are interchanged. C1 [Kalok, D.; Bilusic, A.; Strunk, C.] Univ Regensburg, Inst Expt & Appl Phys, D-93053 Regensburg, Germany. [Bilusic, A.] Univ Split, Fac Sci, Dept Phys, Split, Croatia. [Baturina, T. I.; Mironov, A. Yu; Postolova, S. V.; Gutakovskii, A. K.; Latyshev, A. V.] SB RAS, AV Rzhanov Inst Semicond Phys, Novosibirsk 630090, Russia. [Vinokur, V. M.] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Kalok, D (reprint author), Univ Regensburg, Inst Expt & Appl Phys, D-93053 Regensburg, Germany. EM david.kalok@physik.uni-regensburg.de RI Gutakovskii, Anton/N-3603-2013 OI Gutakovskii, Anton/0000-0002-4712-8736 FU Deutsche Forschungsgemeinschaft [444USA113/3, GRK 638]; Russian Foundation for Basic Research [09-02-01205]; U.S. Department of Energy Office of Science [DE-ACO2-06CH11357] FX We acknowledge support by the Deutsche Forschungsgemeinschaft under Grant 444USA113/3 and within the GRK 638, the Russian Foundation for Basic Research (Grant No. 09-02-01205), and the U.S. Department of Energy Office of Science under the Contract DE-ACO2-06CH11357. NR 16 TC 4 Z9 4 U1 2 U2 10 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 400 AR UNSP 022042 DI 10.1088/1742-6596/400/2/022042 PG 4 WC Physics, Applied; Physics, Multidisciplinary; Physics, Condensed Matter SC Physics GA BDU76 UT WOS:000314977100130 ER PT S AU Liang, KC Chaudhury, RP Lorenz, B Sun, YY Bezmaternykh, LN Gudim, IA Temerov, VL Chu, CW AF Liang, K-C Chaudhury, R. P. Lorenz, B. Sun, Y. Y. Bezmaternykh, L. N. Gudim, I. A. Temerov, V. L. Chu, C. W. GP IOP TI Magnetoelectricity in the system RAl3(BO3)(4) (R = Tb, Ho, Er, Tm) SO 26TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT26), PTS 1-5 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 26th International Conference on Low Temperature Physics (LT) CY AUG 10-17, 2011 CL Beijing, PEOPLES R CHINA ID SINGLE-CRYSTALS; GDFE3(BO3)(4); MULTIFERROICS; POLARIZATION AB The magnetoelectric effect in the system RAl3(BO3)(4) (R = Tb, Ho, Er, Tm) is investigated between 3 K and room temperature and at magnetic fields up to 70 kOe. We show a systematic increase of the magnetoelectric effect with decreasing magnetic anisotropy of the rare earth moment. A giant magnetoelectric polarization is found in the magnetically (nearly) isotropic HoAl3(BO3)(4). The polarization value in transverse field geometry at 70 kOe reaches 3600 mu C/m(2) which is significantly higher than reported values for the field-induced polarization of linear magnetoelectric or even multiferroic compounds. The results indicate a very strong coupling of the f-moments to the lattice. They further indicate the importance of the field-induced ionic displacements in the unit cell resulting in a polar distortion and a change in symmetry on a microscopic scale. The system RAl3(BO3)(4) could be interesting for the technological utilization of the high-field magnetoelectric effect. C1 [Liang, K-C; Lorenz, B.; Sun, Y. Y.; Chu, C. W.] Univ Houston, TCSUH, Houston, TX 77204 USA. [Chaudhury, R. P.] Intel Corp, Hillsboro, OR 07124 USA. [Bezmaternykh, L. N.; Gudim, I. A.; Temerov, V. L.] Russian Acad Sci, Inst Phys Siberian Div, Krasnoyarsk R-660036, Russia. [Chu, C. W.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Liang, KC (reprint author), Univ Houston, TCSUH, Houston, TX 77204 USA. EM blorenz@uh.edu RI Gudim, Irina/K-6294-2015 OI Gudim, Irina/0000-0003-2653-8434 FU T.L.L. Temple Foundation; United States Air Force Office of Scientific Research; Department of Energy; State of Texas through TCSUH FX This work is supported in part by the T.L.L. Temple Foundation, the J. J. and R. Moores Endowment, the United States Air Force Office of Scientific Research, the Department of Energy, and the State of Texas through TCSUH. NR 26 TC 14 Z9 14 U1 0 U2 9 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 400 AR UNSP 032046 DI 10.1088/1742-6596/400/3/032046 PG 6 WC Physics, Applied; Physics, Multidisciplinary; Physics, Condensed Matter SC Physics GA BDU76 UT WOS:000314977100280 ER PT S AU Maniv, A Maniv, T Zhuravlev, V Bergk, B Wosnitza, J Canfield, PC Sonier, JE AF Maniv, A. Maniv, T. Zhuravlev, V. Bergk, B. Wosnitza, J. Canfield, P. C. Sonier, J. E. GP IOP TI Order-disorder transition and magnetic quantum oscillations in the vortex state of strong type-II superconductors SO 26TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT26), PTS 1-5 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 26th International Conference on Low Temperature Physics (LT) CY AUG 10-17, 2011 CL Beijing, PEOPLES R CHINA ID FIELDS AB We present results of mu SR, dHvA, and SQUID magnetization measurements on borocarbide superconductors, which show a remarkable correlation between an order-disorder transition of the vortex lattice, observed in the mu SR measurements, and enhanced additional damping of dHvA oscillations in the peak-effect region. It is, therefore, concluded that an important mechanism of additional damping of dHvA oscillations in the superconducting state should be associated with enhanced scattering of quasi particles by the pair potential in disordered vortex lattices. C1 [Maniv, A.] Nucl Res Ctr Negev, Box 9001, IL-84190 Beer Sheva, Israel. [Maniv, T.; Zhuravlev, V.] Technion Israel Inst Technol, Schulich Fac Chem, IL-32000 Haifa, Israel. [Bergk, B.; Wosnitza, J.] Helmholtz Zentrum Dresden Rossendorf, HLD, DE-01314 Dresden, Germany. [Canfield, P. C.] Iowa State Univ, Ames Lab, Ames, IA 50011 USA. [Canfield, P. C.] Iowa State Univ, Dept Phys, Ames, IA 50011 USA. [Sonier, J. E.] Simon Fraser Univ, Dept Phys, Vancouver, BC V6T 1Z1, Canada. [Sonier, J. E.] Canadian Inst Adv Res, Toronto, ON, Canada. RP Maniv, A (reprint author), Nucl Res Ctr Negev, Box 9001, IL-84190 Beer Sheva, Israel. EM maniv@tx.technion.ac.il RI Canfield, Paul/H-2698-2014 FU Israel Science Foundation [425/07]; Posnansky Research fund in superconductivity; EuroMagNET under EU [228043]; Natural Sciences and Engineering Research Council of Canada; Department of Energy, Basic Energy Sciences [DE-ACO2-07CH11358] FX This research was supported by the Israel Science Foundation Grant No. 425/07, by the Posnansky Research fund in superconductivity, and by EuroMagNET under the EU contract No. 228043. J. E. Sonier acknowledges support from the Natural Sciences and Engineering Research Council of Canada. Work at the Ames Laboratory was supported by the Department of Energy, Basic Energy Sciences under Contract No. DE-ACO2-07CH11358. NR 13 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 400 AR UNSP 022065 DI 10.1088/1742-6596/400/2/022065 PG 4 WC Physics, Applied; Physics, Multidisciplinary; Physics, Condensed Matter SC Physics GA BDU76 UT WOS:000314977100153 ER PT S AU Mci, DM Akerib, DS Bai, XH Bedikian, S Bernard, E Bolozdynya, A Bradley, A Cahn, SB Camp, C Carmona-Benitez, MC Carr, D Chapman, JJ Clark, K Classen, T Coffey, T Curioni, A Dahl, E Dazeley, S de Viveiros, L Dragowsky, M Druszkiewicz, E Faham, CH Fiorucci, S Gaitskell, RJ Gibson, KR Hall, C Hanhardt, M Holbrook, B Ihm, M Jacobsen, RG Kastens, L Kazkaz, K Lander, R Lee, C Leonard, D Lesko, K Lyashenko, A Malling, DC Mannino, R Marquez, Z McKinsey, D Mock, J Morii, M Nelson, H Nokkel, JA Pangilinan, M Phelps, P Rodionov, A Roberts, P Shutt, T Skulski, W Sofka, CJ Sorensen, P Spaans, J Stiegler, T Svoboda, R Sweany, M Thomson, J Tripathi, M Verbus, JR Walsh, N Webb, R White, JT Wlasenko, M Wolfs, FLH Woods, M Zhang, C AF Mci, D-M Akerib, D. S. Bai, X-H Bedikian, S. Bernard, E. Bolozdynya, A. Bradley, A. Cahn, S. B. Camp, C. Carmona-Benitez, M. C. Carr, D. Chapman, J. J. Clark, K. Classen, T. Coffey, T. Curioni, A. Dahl, E. Dazeley, S. de Viveiros, L. Dragowsky, M. Druszkiewicz, E. Faham, C. H. Fiorucci, S. Gaitskell, R. J. Gibson, K. R. Hall, C. Hanhardt, M. Holbrook, B. Ihm, M. Jacobsen, R. G. Kastens, L. Kazkaz, K. Lander, R. Lee, C. Leonard, D. Lesko, K. Lyashenko, A. Malling, D. C. Mannino, R. Marquez, Z. McKinsey, D. Mock, J. Morii, M. Nelson, H. Nokkel, J. A. Pangilinan, M. Phelps, P. Rodionov, A. Roberts, P. Shutt, T. Skulski, W. Sofka, C. J. Sorensen, P. Spaans, J. Stiegler, T. Svoboda, R. Sweany, M. Thomson, J. Tripathi, M. Verbus, J. R. Walsh, N. Webb, R. White, J. T. Wlasenko, M. Wolfs, F. L. H. Woods, M. Zhang, C. GP IOP TI Cryogenic Large Liquid Xenon Detector for Dark Matter Searches SO 26TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT26), PTS 1-5 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 26th International Conference on Low Temperature Physics (LT) CY AUG 10-17, 2011 CL Beijing, PEOPLES R CHINA ID ARGON AB Observation of rotational curve of spiral galaxies shows that a large fraction (similar to 23%) of the mass density of the universe is unaccounted for. Such a significant percentage of missing dark matter suggests that the universe may consist of new types of elementary particles. A compelling explanation for the new particles is the existence of Weakly Interacting Massive Particles (WIMPs), which are non-baryonic particles characterized by particle physics theories beyond the Standard Model. WIMPs are believed to only interact through the weak force and gravity; hence the interaction cross section with ordinary matter is extremely small. Therefore, experimental techniques that combine low radioactivity, low energy thresholds, efficient discrimination against electronic recoil backgrounds, and scalability to large detector masses can only be performed at a deep underground environment where the interference of cosmic rays is obviated. In this paper, we report a cryogenic large liquid xenon detector for dark matter searches at Sanford Lab (Davis Cavern) in the Homestake Mine, USA. The goal of the large underground xenon (LUX) dual-phase detector is to clearly detect (or exclude) WIMPs with a spin independent cross-section per nucleon of 7 x 10(-46) cm(2), equivalent to similar to 0.5 events/100 kg/month in an inner 100 kg fiducial volume (FV) of a 300 kg LXe detector. C1 [Mci, D-M; Spaans, J.; Zhang, C.] Univ S Dakota, Dept Phys 1, 414 E Clark St, Vermillion, SD 57069 USA. [Akerib, D. S.; Bradley, A.; Carmona-Benitez, M. C.; Clark, K.; Dahl, E.; Dragowsky, M.; Gibson, K. R.; Shutt, T.] Case Western Reserve Univ, Dept Phys, Cleveland, OH 44106 USA. [Morii, M.; Sorensen, P.] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA. [Lesko, K.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Bernard, E.; Carr, D.; Dazeley, S.; Kazkaz, K.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. [Bolozdynya, A.] Moscow Phys Engn Inst, Moscow R-115409, Russia. [Bai, X-H; Hanhardt, M.] South Dakota Sch Mines & Technol, Dept Phys, Rapid City, SD 57701 USA. [Camp, C.; Mannino, R.; Marquez, Z.; Rodionov, A.; Roberts, P.; Sofka, C. J.; Stiegler, T.; Webb, R.; White, J. T.] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA. [Ihm, M.; Jacobsen, R. G.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. [Classen, T.; Holbrook, B.; Lander, R.; Mock, J.; Svoboda, R.; Sweany, M.; Thomson, J.; Tripathi, M.; Walsh, N.; Woods, M.] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. [Camp, C.; Mannino, R.; Marquez, Z.; Rodionov, A.; Roberts, P.; Sofka, C. J.; Stiegler, T.; Webb, R.; White, J. T.] Univ Calif Santa Barbara, Dept Phys, Livermore, CA 95616 USA. [Hall, C.; Leonard, D.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA. [Druszkiewicz, E.; Skulski, W.; Wolfs, F. L. H.] Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA. [Mci, D-M; Spaans, J.; Zhang, C.] Univ S Dakota, Dept Phys 4, Vermillion, SD 57069 USA. [Bedikian, S.; Cahn, S. B.; Coffey, T.; Curioni, A.; Kastens, L.; McKinsey, D.; Nokkel, J. A.; Wlasenko, M.] Yale Univ, Dept Phys, New Haven, CT 06511 USA. RP Mci, DM (reprint author), Univ S Dakota, Dept Phys 1, 414 E Clark St, Vermillion, SD 57069 USA. EM dongming.mei@usd.edu RI de Viveiros, Luiz/M-9205-2013 OI de Viveiros, Luiz/0000-0002-7038-2361 FU DOE; NSF; South Dakota 2010 center; South Dakota School Mines and Technology FX The LUX Collaboration would like to thank DOE, NSF, the South Dakota 2010 center and South Dakota School Mines and Technology for the financial support of this work. We also would like to thank the Sanford Lab for their support of the underground laboratory. NR 14 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 400 AR UNSP 052021 DI 10.1088/1742-6596/400/5/052021 PG 7 WC Physics, Applied; Physics, Multidisciplinary; Physics, Condensed Matter SC Physics GA BDU76 UT WOS:000314977100460 ER PT S AU Sochnikov, I Shokef, Y Logvenov, G Bozovic, I Shaulov, A Yeshurun, Y AF Sochnikov, I. Shokef, Y. Logvenov, G. Bozovic, I. Shaulov, A. Yeshurun, Y. GP IOP TI Fluxoid quantization effects in high-T-c superconducting double networks SO 26TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT26), PTS 1-5 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 26th International Conference on Low Temperature Physics (LT) CY AUG 10-17, 2011 CL Beijing, PEOPLES R CHINA ID MAGNETIC-FIELD; VORTEX LATTICE; TEMPERATURE; COMMENSURATE; OSCILLATIONS; PERIODICITY; YBA2CU3O7; STATES; FILMS AB We describe a study of fluxoid quantization effects in a novel superconducting network consisting of two interlaced sub-networks of small and large loops. Computer simulations show different behavior for the sub-networks in this double network. In particular, while the occupation of the large loops by fluxoids grows linearly with the external magnetic field, the small loops occupation grows in steps, similar to the occupation of a single loop. Magnetoresistance measurements in a double network made of MBE grown La1.84Sr0.16CuO4 reveal periodic oscillations resembling that of a single loop with field periodicity as found in the Little-Parks effect. However, the amplitude of the oscillations is found to be larger by almost two orders of magnitude than that expected from this effect. We propose a new model attributing these oscillations to the interaction between moving vortices and the periodic persistent current induced in the loops by the external field. This model explains the large magnetoresistance amplitude as well as its temperature dependence. C1 [Sochnikov, I.; Shaulov, A.; Yeshurun, Y.] Bar Ilan Univ, Dept Phys, Inst Superconduct, IL-52900 Ramat Gan, Israel. [Shokef, Y.] Weizmann Inst Sci, Dept Mat & Interfaces, IL-76100 Rehovot, Israel. [Logvenov, G.; Bozovic, I.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Sochnikov, I (reprint author), Bar Ilan Univ, Dept Phys, Inst Superconduct, IL-52900 Ramat Gan, Israel. EM ilya.sochnkov@gmail.com RI Shokef, Yair/C-3452-2009 OI Shokef, Yair/0000-0002-1195-4614 FU Deutsch Israelische Projektkooperation(DIP) [563363]; US Department of Energy, Basic Energy Sciences, Materials Sciences and Engineering Division FX This work is supported by the Deutsch Israelische Projektkooperation (DIP - Grant no. 563363). I.S. thanks the Israeli Ministry of Science and Technology for Eshkol scholarship. The work at BNL was supported by the US Department of Energy, Basic Energy Sciences, Materials Sciences and Engineering Division. NR 27 TC 0 Z9 0 U1 0 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 400 AR UNSP 022109 DI 10.1088/1742-6596/400/2/022109 PG 6 WC Physics, Applied; Physics, Multidisciplinary; Physics, Condensed Matter SC Physics GA BDU76 UT WOS:000314977100197 ER PT S AU Takita, M Bradbury, FR Gurrieri, TM Wilkel, KJ Eng, K Carroll, MS Lyon, SA AF Takita, Maika Bradbury, F. R. Gurrieri, T. M. Wilkel, K. J. Eng, Kevin Carroll, M. S. Lyon, S. A. GP IOP TI Spatial distribution of electrons on a superfluid helium charge-coupled device SO 26TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT26), PTS 1-5 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 26th International Conference on Low Temperature Physics (LT) CY AUG 10-17, 2011 CL Beijing, PEOPLES R CHINA ID LIQUID-HELIUM; SURFACE AB Electrons floating on the surface of superfluid helium have been suggested as promising mobile spin qubits. Three micron wide channels fabricated with standard silicon processing are filled with superfluid helium by capillary action. Photoemitted electrons are held by voltages applied to underlying gates. The gates are connected as a 3-phase charge-coupled device (CCD). Starting with approximately one electron per channel, no detectable transfer errors occur while clocking 10(9) pixels. One channel with its associated gates is perpendicular to the other 120, providing a CCD which can transfer electrons between the others. This perpendicular channel has not only shown efficient electron transport but also serves as a way to measure the uniformity of the electron occupancy in the 120 parallel channels. C1 [Takita, Maika; Bradbury, F. R.; Lyon, S. A.] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA. [Gurrieri, T. M.; Wilkel, K. J.; Eng, Kevin; Carroll, M. S.] Sandia Natl Labs, Albuquerque, NM USA. [Bradbury, F. R.] Amsterdam Univ Coll, Amsterdam, Netherlands. [Eng, Kevin] HRL Labs, LLC, Malibu, CA USA. RP Takita, M (reprint author), Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA. EM mtakita@princeton.edu FU NSF [CCF-0726490, DMR-1005476, DMR-0844115, ICAM-I2CAM]; Center for Integrated Nanotechnologies; U.S. Department of Energy; Office of Basic Energy Sciences; United States Department of Energy [DE-AC04-94AL85000]; Shields Avenue; Davis [CA 95616] FX We would like to thank S. Shankar and G. Sabouret for helpful discussions and J. Donnal for the electronics to apply clock voltages to the CCD. Work at Princeton was supported by the NSF under Grant Nos. CCF-0726490 and DMR-1005476. Additionally, this work was performed, in part, at the Center for Integrated Nanotechnologies, a U.S. Department of Energy, Office of Basic Energy Sciences user facility. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Co., for the United States Department of Energy under Contract No. DE-AC04-94AL85000. Conference travel was supported by the NSF under Grant No. DMR-0844115 and ICAM-I2CAM, 1 Shields Avenue, Davis, CA 95616. NR 15 TC 1 Z9 1 U1 2 U2 6 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 400 AR UNSP 042059 DI 10.1088/1742-6596/400/4/042059 PG 4 WC Physics, Applied; Physics, Multidisciplinary; Physics, Condensed Matter SC Physics GA BDU76 UT WOS:000314977100419 ER PT S AU Wei, X Bass, C D'Angelo, A Deur, A Dezern, G Ho, D Kageya, T Khandaker, M Kashy, D Laine, V Lowry, M O'Connell, T Sandorfi, AM Teachey, RW Whisnant, CS Zarecky, M AF Wei, X. Bass, C. D'Angelo, A. Deur, A. Dezern, G. Ho, D. Kageya, T. Khandaker, M. Kashy, D. Laine, V. Lowry, M. O'Connell, T. Sandorfi, A. M. Teachey, R. W. Whisnant, C. S. Zarecky, M. GP IOP TI HDice, Highly-Polarized Low-Background Frozen-Spin HD Targets for CLAS experiments at Jefferson Lab SO 26TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT26), PTS 1-5 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 26th International Conference on Low Temperature Physics (LT) CY AUG 10-17, 2011 CL Beijing, PEOPLES R CHINA ID SOLID HD AB Large, portable frozen-spin HD (Deuterium-Hydride) targets have been developed for studying nucleon spin properties with low backgrounds. Protons and Deuterons in HD are polarized at low temperatures (similar to 10mK) inside a vertical dilution refrigerator (Oxford Kelvinox-1000) containing a high magnetic field (up to 17T). The targets reach a frozen-spin state within a few months, after which they can be cold transferred to an In-Beam Cryostat (IBC). The IBC, a thin-walled dilution refrigerator operating either horizontally or vertically, is use with quasi-4 pi detector systems in open geometries with minimal energy loss for exiting reaction products in nucleon structure experiments. The first application of this advanced target system has been used for Spin Sum Rule experiments at the LEGS facility in Brookhaven National Laboratory. An improved target production and handling system has been developed at Jefferson Lab for experiments with the CEBAF Large Acceptance Spectrometer, CLAS. C1 [Wei, X.; Deur, A.; Dezern, G.; Kageya, T.; Khandaker, M.; Kashy, D.; Laine, V.; Lowry, M.; Sandorfi, A. M.; Teachey, R. W.; Zarecky, M.] Jefferson Lab, Newport News, VA 23606 USA. [D'Angelo, A.] Univ Roma Tor Vergata, Rome, Italy. [D'Angelo, A.] INFN Sez Roma2, Rome, Italy. [Ho, D.] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. [Khandaker, M.] Norfolk State Univ, Norfolk, VA 23504 USA. [Laine, V.] Univ Blaise Pascal, Clermont Ferrand, France. [O'Connell, T.] Univ Connecticut, Storrs, CT 06269 USA. [Whisnant, C. S.] James Madison Univ, Harrisonburg, PA 22807 USA. RP Wei, X (reprint author), Jefferson Lab, Newport News, VA 23606 USA. EM xwei@jlab.org RI D'Angelo, Annalisa/A-2439-2012 OI D'Angelo, Annalisa/0000-0003-3050-4907 FU US Department of Energy, Office of Nuclear Physics Division [DE-ACO5-060R23177] FX This work was supported by the US Department of Energy, Office of Nuclear Physics Division, under contract no. DE-ACO5-060R23177 under which Jefferson Science Associates operates Jefferson Lab. NR 7 TC 0 Z9 0 U1 0 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 400 AR UNSP 052042 DI 10.1088/1742-6596/400/5/052042 PG 4 WC Physics, Applied; Physics, Multidisciplinary; Physics, Condensed Matter SC Physics GA BDU76 UT WOS:000314977100481 ER PT S AU Marken, K AF Marken, K. BE Melhem, Z TI Fundamental issues in high temperature superconductor (HTS) materials science and engineering SO HIGH TEMPERATURE SUPERCONDUCTORS (HTS) FOR ENERGY APPLICATIONS SE Woodhead Publishing Series in Energy LA English DT Article; Book Chapter DE critical current density; flux pinning; BiSrCaCuO; YBaCuO; dollars per kiloamp-meter ID CU-O SYSTEM; CRITICAL-CURRENT DENSITY; YBA2CU3O7-X THIN-FILMS; WIRES; PERFORMANCE; FABRICATION; DEPENDENCE; DEPOSITION; PRESSURE; STRANDS AB A key factor for enabling high temperature superconductor (HTS) applications is the critical current density (J(c)). The basic physics determining J(c) is presented, along with basic concepts of the materials science of engineered flux-pinning defects, which provide tools to increase J(c) in a superconductor. A history of the development of HTS materials concludes with comparison of processing and performance in three practical materials. Other key properties that enable applications are discussed, including economic considerations. Present status and price/performance trends indicate a wane in importance of BSCCO materials while YBCO-coated conductors seem to be growing in importance. The significant challenges that remain for the technical and commercial success of YBCO are outlined. C1 Los Alamos Natl Lab, Superconduct Technol Ctr, Los Alamos, NM 87545 USA. RP Marken, K (reprint author), Los Alamos Natl Lab, Superconduct Technol Ctr, Mail Stop K763,POB 1663, Los Alamos, NM 87545 USA. EM kmarken@lanl.gov NR 66 TC 0 Z9 0 U1 0 U2 1 PU WOODHEAD PUBL LTD PI CAMBRIDGE PA ABINGTON HALL ABINGTON, CAMBRIDGE CB1 6AH, CAMBS, ENGLAND SN 2044-9364 BN 978-0-85709-529-9 J9 WOODHEAD PUBL SER EN PY 2012 IS 27 BP 3 EP 33 PG 31 WC Energy & Fuels; Physics, Applied SC Energy & Fuels; Physics GA BDP36 UT WOS:000314300600002 ER PT S AU Barnhart, TE Engle, JW Severin, GW Valdovinos, HF Gagnon, K Nickles, J AF Barnhart, T. E. Engle, J. W. Severin, G. W. Valdovinos, H. F. Gagnon, K. Nickles, J. BE AvilaRodriguez, MA ONeil, JP Barnhart, TE Dick, DW Koziorowski, JM Lapi, SE Lewis, JS TI An After-Market, Five-Port Vertical Beam Line Extension For The PETtrace SO 14TH INTERNATIONAL WORKSHOP ON TARGETRY AND TARGET CHEMISTRY SE AIP Conference Proceedings LA English DT Proceedings Paper CT 14th International Workshop on Targetry and Target Chemistry (WTTC) CY AUG 26-29, 2012 CL Playa del Carmen, MEXICO SP Natl Autonomous Univ Mexico (UNAM), Fac Med, Int Atom Energy Agcy (IAEA), World Federat Nucl Med & Biol (WFNMB), Siemens, GE Hlthcare, IBA, Eckert & Ziegler, LabLogic, Comecer, Eczacibasi, Monrol, Adv Cyclotron Syst, Tema Sinergie, Von Gahlen, Capintec, Inc, Bruce Technologies, Posi Med, Advion, ABX, ACF Met, D-Pace, Micromatter, Best Cyclotron Syst, Inc DE beam optics; radionuclide production AB Most commercial cyclotrons intended for medical isotope production provide a limited number of beam ports crowded into a minimal vault space. Taking advantage of our new lab construction, we planned and installed a beam-line on port #2 of our GEMS PETtrace to bring beam to an additional 5 target positions. These are oriented in the vertical plane, with the downward directed beam well suited for molten target substrates. C1 [Barnhart, T. E.; Valdovinos, H. F.; Nickles, J.] Univ Wisconsin, Dept Med Phys, 1530 Med Sci Ctr, Madison, WI 53706 USA. [Engle, J. W.] Los Alamos Natl Lab, Los Alamos, NM USA. [Severin, G. W.] Danish Tech Univ, Hevesy Lab, Riso, Denmark. [Gagnon, K.] Univ Washington, Dept Radiol, Seattle, WA USA. RP Barnhart, TE (reprint author), Univ Wisconsin, Dept Med Phys, 1530 Med Sci Ctr, Madison, WI 53706 USA. RI Severin, Gregory/C-2230-2015 OI Severin, Gregory/0000-0003-1189-7311 FU NCI Training [T32 CA09206] FX The support of the NCI Training Grant T32 CA09206 and the skills of the staff at National Electrostatics Corporation are gratefully acknowledged. NR 2 TC 0 Z9 0 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1127-2 J9 AIP CONF PROC PY 2012 VL 1509 BP 21 EP 24 DI 10.1063/1.4773932 PG 4 WC Physics, Applied SC Physics GA BDU95 UT WOS:000315028700003 ER PT S AU Engle, JW Gagnon, K Severin, GW Valdovinos, HF Nickles, RJ Barnhart, TE AF Engle, J. W. Gagnon, K. Severin, G. W. Valdovinos, H. F. Nickles, R. J. Barnhart, T. E. BE AvilaRodriguez, MA ONeil, JP Barnhart, TE Dick, DW Koziorowski, JM Lapi, SE Lewis, JS TI Flexible, Durable Proton Energy Degraders for the GE PETtrace SO 14TH INTERNATIONAL WORKSHOP ON TARGETRY AND TARGET CHEMISTRY SE AIP Conference Proceedings LA English DT Proceedings Paper CT 14th International Workshop on Targetry and Target Chemistry (WTTC) CY AUG 26-29, 2012 CL Playa del Carmen, MEXICO SP Natl Autonomous Univ Mexico (UNAM), Fac Med, Int Atom Energy Agcy (IAEA), World Federat Nucl Med & Biol (WFNMB), Siemens, GE Hlthcare, IBA, Eckert & Ziegler, LabLogic, Comecer, Eczacibasi, Monrol, Adv Cyclotron Syst, Tema Sinergie, Von Gahlen, Capintec, Inc, Bruce Technologies, Posi Med, Advion, ABX, ACF Met, D-Pace, Micromatter, Best Cyclotron Syst, Inc DE Cyclotron; degrader; proton energy; solid target AB In order to limit the formation of radioisotopic impurities during proton bombardments of solid targets, two methods of introducing degrader foils into the beam upstream of the target were tested. The first design uses a 445 mu m thick fixed degrader machined from a single piece of aluminum. The second design permits introduction of foils made of any material and was tested with foils as thick as 635 mu m (also aluminium). In both cases, the foils are cooled with by water flowing through an annular channel outside the radius of the beam. Both designs proved durable and tolerated proton beam currents in excess of 80 mu A. C1 [Engle, J. W.] Los Alamos Natl Lab, Chem Div Isotopes Inorgan & Actinides, Los Alamos, NM 87544 USA. [Gagnon, K.] Univ Washington, Dept Radiat Oncol, Seattle, WA USA. [Severin, G. W.] Danish Tech Univ, Hevesy Lab, Riso, Denmark. [Valdovinos, H. F.; Nickles, R. J.; Barnhart, T. E.] Univ Wisconsin, Dept Med Phys, Madison, WI USA. RP Engle, JW (reprint author), Los Alamos Natl Lab, Chem Div Isotopes Inorgan & Actinides, Los Alamos, NM 87544 USA. RI Severin, Gregory/C-2230-2015 OI Severin, Gregory/0000-0003-1189-7311 FU NIH Radiological Sciences Training [T32 CA009206] FX The authors gratefully acknowledge the support of NIH Radiological Sciences Training Grant T32 CA009206. NR 3 TC 0 Z9 0 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1127-2 J9 AIP CONF PROC PY 2012 VL 1509 BP 25 EP 29 DI 10.1063/1.4773933 PG 5 WC Physics, Applied SC Physics GA BDU95 UT WOS:000315028700004 ER PT S AU Barnhart, TE Engle, JW Valdovinos, HF Severin, GW Nickles, RJ AF Barnhart, T. E. Engle, J. W. Valdovinos, H. F. Severin, G. W. Nickles, R. J. BE AvilaRodriguez, MA ONeil, JP Barnhart, TE Dick, DW Koziorowski, JM Lapi, SE Lewis, JS TI Prompt Radiation Detectors To Monitor Target Conditions SO 14TH INTERNATIONAL WORKSHOP ON TARGETRY AND TARGET CHEMISTRY SE AIP Conference Proceedings LA English DT Proceedings Paper CT 14th International Workshop on Targetry and Target Chemistry (WTTC) CY AUG 26-29, 2012 CL Playa del Carmen, MEXICO SP Natl Autonomous Univ Mexico (UNAM), Fac Med, Int Atom Energy Agcy (IAEA), World Federat Nucl Med & Biol (WFNMB), Siemens, GE Hlthcare, IBA, Eckert & Ziegler, LabLogic, Comecer, Eczacibasi, Monrol, Adv Cyclotron Syst, Tema Sinergie, Von Gahlen, Capintec, Inc, Bruce Technologies, Posi Med, Advion, ABX, ACF Met, D-Pace, Micromatter, Best Cyclotron Syst, Inc DE nuclear physics; neutron detection; gamma detection AB Lessons learned by basic scientists in the study of experimental nuclear physics can often go unnoticed by cyclotron operator's intent on meeting a demanding schedule of tracer production. Prompt neutrons and gammas are the signature that the desired reaction is occurring, providing a robust measure of the expected yield. C1 [Barnhart, T. E.; Valdovinos, H. F.; Nickles, R. J.] Univ Wisconsin, Dept Med Phys, 1530 Med Sci Ctr, Madison, WI 53706 USA. [Engle, J. W.] Los Alamos Natl Lab, Los Alamos, NM USA. [Severin, G. W.] Danish Tech Univ, Hevesy Lab, Riso, Denmark. RP Barnhart, TE (reprint author), Univ Wisconsin, Dept Med Phys, 1530 Med Sci Ctr, Madison, WI 53706 USA. RI Severin, Gregory/C-2230-2015; OI Severin, Gregory/0000-0003-1189-7311; Engle, Jonathan W/0000-0002-3399-7228 FU NIH Radiological Sciences Training [T32 CA009206] FX We gratefully acknowledge the support of NIH Radiological Sciences Training Grant T32 CA009206. NR 2 TC 1 Z9 1 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1127-2 J9 AIP CONF PROC PY 2012 VL 1509 BP 34 EP 37 DI 10.1063/1.4773935 PG 4 WC Physics, Applied SC Physics GA BDU95 UT WOS:000315028700006 ER PT S AU Jeffery, CM Smith, SV Asad, AH Chan, S Price, RI AF Jeffery, C. M. Smith, S. V. Asad, A. H. Chan, S. Price, R. I. BE AvilaRodriguez, MA ONeil, JP Barnhart, TE Dick, DW Koziorowski, JM Lapi, SE Lewis, JS TI Routine Production of Copper-64 Using 11.7MeV Protons SO 14TH INTERNATIONAL WORKSHOP ON TARGETRY AND TARGET CHEMISTRY SE AIP Conference Proceedings LA English DT Proceedings Paper CT 14th International Workshop on Targetry and Target Chemistry (WTTC) CY AUG 26-29, 2012 CL Playa del Carmen, MEXICO SP Natl Autonomous Univ Mexico (UNAM), Fac Med, Int Atom Energy Agcy (IAEA), World Federat Nucl Med & Biol (WFNMB), Siemens, GE Hlthcare, IBA, Eckert & Ziegler, LabLogic, Comecer, Eczacibasi, Monrol, Adv Cyclotron Syst, Tema Sinergie, Von Gahlen, Capintec, Inc, Bruce Technologies, Posi Med, Advion, ABX, ACF Met, D-Pace, Micromatter, Best Cyclotron Syst, Inc DE Copper-64; nickel-64; PET; low energy cyclotron; specific activity ID ACTIVITY CU-64; CYCLOTRON AB Reliable production of copper-64 (Cu-64) was achieved by irradiating enriched nickel-64 (Ni-64, > 94.8%) in an IBA 18/9 cyclotron. Nickel-64 (19.1 +/- 3.0 mg) was electroplated onto an Au disc (125 mu m x 15mm). Targets were irradiated with 11.7 MeV protons for 2 hours at 40 mu A. Copper isotopes (Cu-60,Cu-61,Cu-62,Cu-64) were separated from target nickel and cobalt isotopes (Co-55,Co-57,Co-61) using a single ion exchange column, eluted with varying concentration of low HCl alcohol solutions. The Ni-64 target material was recovered and reused. The Cu-64 production rate was 1.46 +/- 0.3 MBq/mu A. hr/mg Ni-64 (n = 10) with a maximum of 2.6GBq of Cu-64 isolated after 2hr irradiation at 40uA. Radionuclidic purity of the Cu-64 was 98.7 +/- 1.6 % at end of separation. Cu content was < 6mg/L (n = 21). The specific activity of Cu-64 was determined by ICP-MS and by titration with Diamsar to be 28.9 +/- 13.0 GBq/mu mol [0.70 +/- 0.35 Ci/mu mol]/(mu A. hr/mg Ni-64) (n = 10) and 13.1 +/- 12.0 GBq/mu mol [0.35 +/- 0.32 Ci/mu mol] /(mu A. hr/mg Ni-64) (n = 9), respectively; which are in agreement, however, further work is required. C1 [Jeffery, C. M.; Asad, A. H.; Chan, S.; Price, R. I.] Sir Charles Gairdner Hosp, Nedlands, WA 6009, Australia. [Jeffery, C. M.] Univ Western Australia, Centre Forens Sci, Nedlands, WA 6009, Australia. [Jeffery, C. M.; Smith, S. V.; Asad, A. H.] Australian Natl Univ, ARC Ctr Excellence Antimatter Matter Studies, Canberra, ACT 0200, Australia. [Smith, S. V.] Collider Accelerator Dept, Brookhaven Natl Lab, Upton, NY 11973 USA. [Smith, S. V.] Curtin Univ Technol, Imaging & Appl Phys, Bentley, WA 6102, Australia. [Price, R. I.] Univ Western Australia, Sch Phys, Nedlands, WA 6009, Australia. RP Jeffery, CM (reprint author), Sir Charles Gairdner Hosp, Nedlands, WA 6009, Australia. NR 9 TC 3 Z9 3 U1 1 U2 3 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1127-2 J9 AIP CONF PROC PY 2012 VL 1509 BP 84 EP 90 DI 10.1063/1.4773946 PG 7 WC Physics, Applied SC Physics GA BDU95 UT WOS:000315028700017 ER PT S AU Asad, AH Smith, SV Chan, S Jeffery, CM Morandeau, L Price, RI AF Asad, A. H. Smith, S. V. Chan, S. Jeffery, C. M. Morandeau, L. Price, R. I. BE AvilaRodriguez, MA ONeil, JP Barnhart, TE Dick, DW Koziorowski, JM Lapi, SE Lewis, JS TI Cyclotron Production of Cu-61 using Natural Zn & Enriched Zn-64 Targets SO 14TH INTERNATIONAL WORKSHOP ON TARGETRY AND TARGET CHEMISTRY SE AIP Conference Proceedings LA English DT Proceedings Paper CT 14th International Workshop on Targetry and Target Chemistry (WTTC) CY AUG 26-29, 2012 CL Playa del Carmen, MEXICO SP Natl Autonomous Univ Mexico (UNAM), Fac Med, Int Atom Energy Agcy (IAEA), World Federat Nucl Med & Biol (WFNMB), Siemens, GE Hlthcare, IBA, Eckert & Ziegler, LabLogic, Comecer, Eczacibasi, Monrol, Adv Cyclotron Syst, Tema Sinergie, Von Gahlen, Capintec, Inc, Bruce Technologies, Posi Med, Advion, ABX, ACF Met, D-Pace, Micromatter, Best Cyclotron Syst, Inc DE Cu-61; Production; Zn-64 electroplating; Separation ID INDUCED NUCLEAR-REACTIONS; EXCITATION-FUNCTIONS; PROTON IRRADIATION; MEDICAL CYCLOTRON; NAT AB Copper-61 (Cu-61) shares with Cu-64 certain advantages for PET diagnostic imaging, but has a shorter half-life (3.4hr vs. 12.7hr) and a greater probability of positron production per disintegration (61% vs. 17.9%). One important application is for in vivo imaging of hypoxic tissue. In this study Cu-61 was produced using the Zn-64(p,alpha)Cu-61 reaction on natural Zn or enriched Zn-64 targets. The enriched Zn-64 (99.82%) was electroplated onto high purity gold or silver foils or onto thin Al discs. A typical target bombardment used 30 mu A; at 11.7, 14.5 or 17.6MeV over 30-60min. The Cu-61 (radiochemical purity of >95%) was separated using a combination of cation and anion exchange columns. The Zn-64 target material was recovered after each run, for re-use. In a direct comparison with enriched Zn-64-target results, Cu-61 production using the cheaper Zn-nat target proved to be an effective alternative. C1 [Asad, A. H.; Chan, S.; Jeffery, C. M.; Morandeau, L.; Price, R. I.] Sir Charles Gairdner Hosp, RAPID PET Labs, Perth, WA, Australia. [Asad, A. H.] Curtin Univ, Imaging Appl Phys, Perth, WA, Australia. [Smith, S. V.] Brookhaven Natl Lab, Upton, NY USA. [Smith, S. V.; Jeffery, C. M.] Australian Natl Univ, Ctr Excellence Anti matter Matter Studies, Canberra, ACT, Australia. [Jeffery, C. M.] Univ Western Australia, Chemistry, Perth, WA, Australia. [Price, R. I.] Univ Western Australia, Phys, Perth, WA, Australia. RP Asad, AH (reprint author), Sir Charles Gairdner Hosp, RAPID PET Labs, Perth, WA, Australia. NR 11 TC 4 Z9 4 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1127-2 J9 AIP CONF PROC PY 2012 VL 1509 BP 91 EP 95 DI 10.1063/1.4773947 PG 5 WC Physics, Applied SC Physics GA BDU95 UT WOS:000315028700018 ER PT S AU Engle, JW Bach, H Couture, A Gritzo, R Smith, DM Bitteker, LJ Ullmann, JL Gulley, M Pillai, C Birnbaum, ER John, KD Nortier, FM AF Engle, J. W. Bach, H. Couture, A. Gritzo, R. Smith, D. M. Bitteker, L. J. Ullmann, J. L. Gulley, M. Pillai, C. Birnbaum, E. R. John, K. D. Nortier, F. M. BE AvilaRodriguez, MA ONeil, JP Barnhart, TE Dick, DW Koziorowski, JM Lapi, SE Lewis, JS TI Cross Sections for Proton Induced Reactions on Terbium at 200 MeV SO 14TH INTERNATIONAL WORKSHOP ON TARGETRY AND TARGET CHEMISTRY SE AIP Conference Proceedings LA English DT Proceedings Paper CT 14th International Workshop on Targetry and Target Chemistry (WTTC) CY AUG 26-29, 2012 CL Playa del Carmen, MEXICO SP Natl Autonomous Univ Mexico (UNAM), Fac Med, Int Atom Energy Agcy (IAEA), World Federat Nucl Med & Biol (WFNMB), Siemens, GE Hlthcare, IBA, Eckert & Ziegler, LabLogic, Comecer, Eczacibasi, Monrol, Adv Cyclotron Syst, Tema Sinergie, Von Gahlen, Capintec, Inc, Bruce Technologies, Posi Med, Advion, ABX, ACF Met, D-Pace, Micromatter, Best Cyclotron Syst, Inc DE Proton irradiation; neutron activation; isotope production AB The potential for the production of 153Gd (240.4 d, 100% EC) has been investigated by proton irradiations of terbium targets between 100 and 200 MeV. Irradiations were conducted in the Los Alamos Neutron Science Center using low current proton irradiations of terbium foil stacks, and radioactive products were assayed by HPGe gamma spectroscopy for several months following irradiation. The predictions of the ALICE 2011 nuclear code are compared with the measured results. C1 [Engle, J. W.; Bach, H.; Couture, A.; Gritzo, R.; Smith, D. M.; Bitteker, L. J.; Ullmann, J. L.; Gulley, M.; Pillai, C.; Birnbaum, E. R.; John, K. D.; Nortier, F. M.] Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Engle, JW (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87544 USA. EM jwengle@lanl.gov OI John, Kevin/0000-0002-6181-9330; Nortier, Francois/0000-0002-7549-8101 NR 1 TC 1 Z9 1 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1127-2 J9 AIP CONF PROC PY 2012 VL 1509 BP 152 EP 156 DI 10.1063/1.4773958 PG 5 WC Physics, Applied SC Physics GA BDU95 UT WOS:000315028700029 ER PT S AU Ehst, DA Smith, NA Bowers, DL Makarashvili, V AF Ehst, D. A. Smith, N. A. Bowers, D. L. Makarashvili, V. BE AvilaRodriguez, MA ONeil, JP Barnhart, TE Dick, DW Koziorowski, JM Lapi, SE Lewis, JS TI Copper-67 Production on Electron Linacs-Photonuclear Technology Development SO 14TH INTERNATIONAL WORKSHOP ON TARGETRY AND TARGET CHEMISTRY SE AIP Conference Proceedings LA English DT Proceedings Paper CT 14th International Workshop on Targetry and Target Chemistry (WTTC) CY AUG 26-29, 2012 CL Playa del Carmen, MEXICO SP Natl Autonomous Univ Mexico (UNAM), Fac Med, Int Atom Energy Agcy (IAEA), World Federat Nucl Med & Biol (WFNMB), Siemens, GE Hlthcare, IBA, Eckert & Ziegler, LabLogic, Comecer, Eczacibasi, Monrol, Adv Cyclotron Syst, Tema Sinergie, Von Gahlen, Capintec, Inc, Bruce Technologies, Posi Med, Advion, ABX, ACF Met, D-Pace, Micromatter, Best Cyclotron Syst, Inc DE photonuclear; 67-Cu; copper-67; electron linac AB Despite modest photonuclear cross sections, such as for the Zn-68(gamma,p)Cu-67 reaction, electron linac technology appears to be a commercially promising option for production of valuable isotopes. Electron accelerators-sources of Bremsstrahlung gamma radiation-are presently available and under-utilized and may offer an affordable route to an expanded supply of Cu-67 and other isotopes. Two key developments have been demonstrated for Cu-67 production: large (100g) solid metal targets; and rapid (1-day) separation of trace amounts of product from the target mass. C1 [Ehst, D. A.; Smith, N. A.; Bowers, D. L.; Makarashvili, V.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Ehst, DA (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 0 TC 1 Z9 1 U1 1 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1127-2 J9 AIP CONF PROC PY 2012 VL 1509 BP 157 EP 161 DI 10.1063/1.4773959 PG 5 WC Physics, Applied SC Physics GA BDU95 UT WOS:000315028700030 ER PT S AU Engle, JW Kelsey, CT Bach, H Ballard, BD Fassbender, ME John, KD Birnbaum, ER Nortier, FM AF Engle, J. W. Kelsey, C. T. Bach, H. Ballard, B. D. Fassbender, M. E. John, K. D. Birnbaum, E. R. Nortier, F. M. BE AvilaRodriguez, MA ONeil, JP Barnhart, TE Dick, DW Koziorowski, JM Lapi, SE Lewis, JS TI Preliminary Investigation of Parasitic Radioisotope Production Using the LANL IPF Secondary Neutron Flux SO 14TH INTERNATIONAL WORKSHOP ON TARGETRY AND TARGET CHEMISTRY SE AIP Conference Proceedings LA English DT Proceedings Paper CT 14th International Workshop on Targetry and Target Chemistry (WTTC) CY AUG 26-29, 2012 CL Playa del Carmen, MEXICO SP Natl Autonomous Univ Mexico (UNAM), Fac Med, Int Atom Energy Agcy (IAEA), World Federat Nucl Med & Biol (WFNMB), Siemens, GE Hlthcare, IBA, Eckert & Ziegler, LabLogic, Comecer, Eczacibasi, Monrol, Adv Cyclotron Syst, Tema Sinergie, Von Gahlen, Capintec, Inc, Bruce Technologies, Posi Med, Advion, ABX, ACF Met, D-Pace, Micromatter, Best Cyclotron Syst, Inc DE Proton irradiation; neutron activation; isotope production AB In order to ascertain the potential for radioisotope production and material science studies using the Isotope Production Facility at Los Alamos National Lab, a two-pronged investigation has been initiated. The Monte Carlo for Neutral Particles eXtended (MCNPX) code has been used in conjunction with the CINDER90 burnup code to predict neutron flux energy distributions as a result of routine irradiations and to estimate yields of radioisotopes of interest for hypothetical irradiation conditions. A threshold foil activation experiment is planned to study the neutron flux using measured yields of radioisotopes, quantified by HPGe gamma spectroscopy, from representative nuclear reactions with known thresholds up to 50 MeV. C1 [Engle, J. W.; Kelsey, C. T.; Bach, H.; Ballard, B. D.; Fassbender, M. E.; John, K. D.; Birnbaum, E. R.; Nortier, F. M.] Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Engle, JW (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87544 USA. EM jwengle@lanl.gov RI Ballard, Beau/E-2925-2017; OI Ballard, Beau/0000-0003-1206-9358; John, Kevin/0000-0002-6181-9330; Nortier, Francois/0000-0002-7549-8101 NR 0 TC 0 Z9 0 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1127-2 J9 AIP CONF PROC PY 2012 VL 1509 BP 171 EP 175 DI 10.1063/1.4773961 PG 5 WC Physics, Applied SC Physics GA BDU95 UT WOS:000315028700032 ER PT S AU Gagnon, K Severin, GW Barnhart, TE Engle, JW Valdovinos, HF Nickles, RJ AF Gagnon, K. Severin, G. W. Barnhart, T. E. Engle, J. W. Valdovinos, H. F. Nickles, R. J. BE AvilaRodriguez, MA ONeil, JP Barnhart, TE Dick, DW Koziorowski, JM Lapi, SE Lewis, JS TI Ti-45 Extraction Using Hydroxamate Resin SO 14TH INTERNATIONAL WORKSHOP ON TARGETRY AND TARGET CHEMISTRY SE AIP Conference Proceedings LA English DT Proceedings Paper CT 14th International Workshop on Targetry and Target Chemistry (WTTC) CY AUG 26-29, 2012 CL Playa del Carmen, MEXICO SP Natl Autonomous Univ Mexico (UNAM), Fac Med, Int Atom Energy Agcy (IAEA), World Federat Nucl Med & Biol (WFNMB), Siemens, GE Hlthcare, IBA, Eckert & Ziegler, LabLogic, Comecer, Eczacibasi, Monrol, Adv Cyclotron Syst, Tema Sinergie, Von Gahlen, Capintec, Inc, Bruce Technologies, Posi Med, Advion, ABX, ACF Met, D-Pace, Micromatter, Best Cyclotron Syst, Inc DE Cyclotron; Ti-45 production; scandium; hydroxamate resin; desferal; chelation; positron emitter ID SMALL ANIMAL PET AB As an attractive radionuclide for positron emission tomography, this study explores the extraction and reactivity of Ti-45 produced via the Sc-45(p,n)Ti-45 reaction on a GE PETtrace. Using a small hydroxamate column, we have demonstrated an overall recovery of >50% of Ti-45 in similar to 1 mL of 1M oxalic acid. Conditions for reacting with desferal were also explored, with effective specific activities up to 38 GBq/mu mol obtained. C1 [Gagnon, K.] Univ Alberta, Dept Oncol, Edmonton, AB, Canada. [Severin, G. W.; Barnhart, T. E.; Valdovinos, H. F.; Nickles, R. J.] Univ Wisconsin, Dept Med Phys, Madison, WI USA. [Engle, J. W.] Los Alamos Natl Lab, Los Alamos, NM USA. RP Gagnon, K (reprint author), Univ Alberta, Dept Oncol, Edmonton, AB, Canada. EM kgagnon1@ualberta.ca RI Severin, Gregory/C-2230-2015 OI Severin, Gregory/0000-0003-1189-7311 FU NIH Radiological Sciences Training [T32 CA009206] FX The authors gratefully acknowledge the support of NIH Radiological Sciences Training Grant T32 CA009206. NR 4 TC 2 Z9 2 U1 0 U2 5 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1127-2 J9 AIP CONF PROC PY 2012 VL 1509 BP 211 EP 214 DI 10.1063/1.4773970 PG 4 WC Physics, Applied SC Physics GA BDU95 UT WOS:000315028700041 ER PT S AU Medvedev, DG Smith, SV Mausner, LF AF Medvedev, D. G. Smith, S. V. Mausner, L. F. BE AvilaRodriguez, MA ONeil, JP Barnhart, TE Dick, DW Koziorowski, JM Lapi, SE Lewis, JS TI Recovery and Irradiation of Isotopically Pure Zn-68 and Sr-86 at Brookhaven Linac Isotope Producer SO 14TH INTERNATIONAL WORKSHOP ON TARGETRY AND TARGET CHEMISTRY SE AIP Conference Proceedings LA English DT Proceedings Paper CT 14th International Workshop on Targetry and Target Chemistry (WTTC) CY AUG 26-29, 2012 CL Playa del Carmen, MEXICO SP Natl Autonomous Univ Mexico (UNAM), Fac Med, Int Atom Energy Agcy (IAEA), World Federat Nucl Med & Biol (WFNMB), Siemens, GE Hlthcare, IBA, Eckert & Ziegler, LabLogic, Comecer, Eczacibasi, Monrol, Adv Cyclotron Syst, Tema Sinergie, Von Gahlen, Capintec, Inc, Bruce Technologies, Posi Med, Advion, ABX, ACF Met, D-Pace, Micromatter, Best Cyclotron Syst, Inc DE yttrium-86; copper-67; radioimmunotherapy; medical imaging; radionuclide production ID EXCITATION-FUNCTIONS; CU-67 AB A positron emitter Y-86 and the radiotherapeutic beta emitter, Cu-67 are two radionuclides, that require the use of enriched isotopes for their cost effective production. Proton irradiation of monoisotopic Sr-86 is conducive to the production of Y-86 with less than 2% Y-87/87m impurities, while the use of enriched Zn-68 results in a 4-5 fold increase in the Cu-67 yield compared to natural Zn. Both Sr-86 and Zn-68 are expensive and therefore their full recovery and re-utilization is critical to reduce production costs. In this paper we describe our experience with recovery and consequent irradiation of the Sr-86 and Zn-68. C1 [Medvedev, D. G.; Smith, S. V.; Mausner, L. F.] Brookhaven Natl Lab, Collider Accelerator Dept, Upton, NY 11953 USA. RP Medvedev, DG (reprint author), Brookhaven Natl Lab, Collider Accelerator Dept, Upton, NY 11953 USA. NR 6 TC 2 Z9 2 U1 0 U2 3 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1127-2 J9 AIP CONF PROC PY 2012 VL 1509 BP 218 EP 222 DI 10.1063/1.4773972 PG 5 WC Physics, Applied SC Physics GA BDU95 UT WOS:000315028700043 ER PT S AU Janabi, M Childs, BC Vandehey, NT O'Neil, JP AF Janabi, M. Childs, B. C. Vandehey, N. T. O'Neil, J. P. BE AvilaRodriguez, MA ONeil, JP Barnhart, TE Dick, DW Koziorowski, JM Lapi, SE Lewis, JS TI Evaluation of a Simple Spectrophotometer to Quantify Fluorine Gas from a Cyclotron Target SO 14TH INTERNATIONAL WORKSHOP ON TARGETRY AND TARGET CHEMISTRY SE AIP Conference Proceedings LA English DT Proceedings Paper CT 14th International Workshop on Targetry and Target Chemistry (WTTC) CY AUG 26-29, 2012 CL Playa del Carmen, MEXICO SP Natl Autonomous Univ Mexico (UNAM), Fac Med, Int Atom Energy Agcy (IAEA), World Federat Nucl Med & Biol (WFNMB), Siemens, GE Hlthcare, IBA, Eckert & Ziegler, LabLogic, Comecer, Eczacibasi, Monrol, Adv Cyclotron Syst, Tema Sinergie, Von Gahlen, Capintec, Inc, Bruce Technologies, Posi Med, Advion, ABX, ACF Met, D-Pace, Micromatter, Best Cyclotron Syst, Inc DE Fluorine-18; Fluorine gas; triiodide; Spectrophotometer AB In an effort to more quickly evaluate the conditioning of our F-18-fluorine target and determine the amount of F-2 that is released with each unload, a simple spectrophotometer was fabricated that aids in quantifying the I-2 produced as a result of bubbling F-2 gas into a solution of potassium iodide. A narrow range LED (470 +/- 10 nm), combined with a wide range photodiode (320-1100 nm) were used to construct the simple spectrophotometer device. We were able to use this device to quantitate the amount of F-2 released and obtained a good correlation (R-2 > 0.991) with the values obtained by the "traditional" titration method. C1 [Janabi, M.; Childs, B. C.; Vandehey, N. T.; O'Neil, J. P.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Biomed Isotope Facil, Berkeley, CA 94720 USA. RP Janabi, M (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Biomed Isotope Facil, 1Cyclotron Rd, Berkeley, CA 94720 USA. OI Vandehey, Nicholas/0000-0003-0286-7532 NR 6 TC 0 Z9 0 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1127-2 J9 AIP CONF PROC PY 2012 VL 1509 BP 239 EP 243 DI 10.1063/1.4773976 PG 5 WC Physics, Applied SC Physics GA BDU95 UT WOS:000315028700047 ER PT S AU Vandehey, NT O'Neil, JP AF Vandehey, N. T. O'Neil, J. P. BE AvilaRodriguez, MA ONeil, JP Barnhart, TE Dick, DW Koziorowski, JM Lapi, SE Lewis, JS TI Conversion of a Commercial UV Detector for in Hot Cell Use SO 14TH INTERNATIONAL WORKSHOP ON TARGETRY AND TARGET CHEMISTRY SE AIP Conference Proceedings LA English DT Proceedings Paper CT 14th International Workshop on Targetry and Target Chemistry (WTTC) CY AUG 26-29, 2012 CL Playa del Carmen, MEXICO SP Natl Autonomous Univ Mexico (UNAM), Fac Med, Int Atom Energy Agcy (IAEA), World Federat Nucl Med & Biol (WFNMB), Siemens, GE Hlthcare, IBA, Eckert & Ziegler, LabLogic, Comecer, Eczacibasi, Monrol, Adv Cyclotron Syst, Tema Sinergie, Von Gahlen, Capintec, Inc, Bruce Technologies, Posi Med, Advion, ABX, ACF Met, D-Pace, Micromatter, Best Cyclotron Syst, Inc DE Remote Sensing; UV absorbance; Automation; Instrumentation AB This paper describes the modifications made to a BioRad EM-1 UV detector for use in a radioactive material handling hot cell. A 5m cable has been built to allow the control unit to remain outside of the hot cell while the optics unit resides inside the hot cell. A USB data acquisition and control device has also been added to the control unit, allowing for PC control of the instrument and reading UV signals without the need to choose a pre-determined absorbance range, maximizing the dynamic range of measured absorbance. C1 [Vandehey, N. T.; O'Neil, J. P.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Biomed Isotope Facil, Berkeley, CA 94720 USA. RP Vandehey, NT (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Biomed Isotope Facil, 1 Cyclotron Rd, Berkeley, CA 94720 USA. OI Vandehey, Nicholas/0000-0003-0286-7532 NR 5 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1127-2 J9 AIP CONF PROC PY 2012 VL 1509 BP 244 EP 248 DI 10.1063/1.4773977 PG 5 WC Physics, Applied SC Physics GA BDU95 UT WOS:000315028700048 ER PT S AU Powell, J O'Neil, JP AF Powell, J. O'Neil, J. P. BE AvilaRodriguez, MA ONeil, JP Barnhart, TE Dick, DW Koziorowski, JM Lapi, SE Lewis, JS TI A Simple Low-Cost Photodiode Radiation Detector for Monitoring In Process PET Radiochemistry SO 14TH INTERNATIONAL WORKSHOP ON TARGETRY AND TARGET CHEMISTRY SE AIP Conference Proceedings LA English DT Proceedings Paper CT 14th International Workshop on Targetry and Target Chemistry (WTTC) CY AUG 26-29, 2012 CL Playa del Carmen, MEXICO SP Natl Autonomous Univ Mexico (UNAM), Fac Med, Int Atom Energy Agcy (IAEA), World Federat Nucl Med & Biol (WFNMB), Siemens, GE Hlthcare, IBA, Eckert & Ziegler, LabLogic, Comecer, Eczacibasi, Monrol, Adv Cyclotron Syst, Tema Sinergie, Von Gahlen, Capintec, Inc, Bruce Technologies, Posi Med, Advion, ABX, ACF Met, D-Pace, Micromatter, Best Cyclotron Syst, Inc DE Radiation Detector; Radiochemistry Automation; PET AB We herein report a compact, low-noise, detector design based on off-the-self amplifier and two-wire 4-20 mA transmitter chips that can easily be connected to standard analogue input electronics with only a single twisted pair of wires. The radiation detectors described herein are low-cost, easy to construct, and reliable. C1 [Powell, J.] Univ Calif San Francisco, Dept Radiol & Biomed Imaging, San Francisco, CA 94107 USA. [O'Neil, J. P.] Lawrence Berkeley Natl Lab, Biomed Isotope Facil, Berkeley, CA 94720 USA. RP Powell, J (reprint author), Univ Calif San Francisco, Dept Radiol & Biomed Imaging, San Francisco, CA 94107 USA. FU Director, Office of Science, OBER, Biological Systems Science Division of the U.S. Department of Energy [DE-AC02-05CH11231] FX The authors wish to thank Nick Vandehey for his assistance in data collection and detector evaluation. This work was supported by the Director, Office of Science, OBER, Biological Systems Science Division of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 NR 2 TC 2 Z9 2 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1127-2 J9 AIP CONF PROC PY 2012 VL 1509 BP 249 EP 253 DI 10.1063/1.4773978 PG 5 WC Physics, Applied SC Physics GA BDU95 UT WOS:000315028700049 ER PT S AU Al-Naib, I Singh, R Shalaby, M Ozaki, T Morandotti, R AF Al-Naib, I. Singh, R. Shalaby, M. Ozaki, T. Morandotti, R. GP IEEE TI Engineering the Response of Terahertz Metasurfaces by Spatial Arrangement of Split-Ring Resonators SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We demonstrate the effect of spatial arrangement of split-ring resonators (SRR) in a macrocell with two SRRs. The diagonal scheme presents the optimal coupling and constructively interfering scattered fields, in turn enhancing the quality factor. C1 [Al-Naib, I.; Shalaby, M.; Ozaki, T.; Morandotti, R.] Univ Quebec, INRS EMT, Varennes, PQ J3X 1S2, Canada. [Singh, R.] Los Alamos Natl Lab, Mat Phys & Appl Div, Ctr Integrated NanoTechnol, Los Alamos, NM 87545 USA. RP Al-Naib, I (reprint author), Univ Quebec, INRS EMT, Varennes, PQ J3X 1S2, Canada. EM alnaib@emt.inrs.ca RI Al-Naib, Ibraheem/A-2344-2009 FU Natural Sciences and Engineering Research Council of Canada (NSERC) and the Fonds Quebecois de la Recherche sur la Nature et les Technologies (FQRNT) FX This work was supported by the Natural Sciences and Engineering Research Council of Canada (NSERC) and the Fonds Quebecois de la Recherche sur la Nature et les Technologies (FQRNT). NR 2 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362402168 ER PT S AU Albrecht, AR Seletskiy, DV Hains, CP Cederberg, JG Di Lieto, A Tonelli, M Balakrishnan, G Sheik-Bahae, M AF Albrecht, Alexander R. Seletskiy, Denis V. Hains, Christopher P. Cederberg, Jeffrey G. Di Lieto, Alberto Tonelli, Mauro Balakrishnan, Ganesh Sheik-Bahae, Mansoor GP IEEE TI Intracavity Laser Cooling Using a VECSEL SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We demonstrate intracavity laser cooling inside of a VECSEL, where the temperature of a Yb:YLF crystal was lowered by 20 K. We outline future improvements, striving towards a compact, efficient cryocooler device. C1 [Albrecht, Alexander R.; Seletskiy, Denis V.; Sheik-Bahae, Mansoor] Univ New Mexico, Dept Phys & Astron, 800 Yale Blvd NE, Albuquerque, NM 87131 USA. [Albrecht, Alexander R.; Hains, Christopher P.; Balakrishnan, Ganesh] Univ New Mexico, Ctr High Technol Mat, Albuquerque, NM 87106 USA. [Di Lieto, Alberto; Tonelli, Mauro] Univ Pisa, NEST CNR, Dipartimento Fis, I-56127 Pisa, Italy. [Seletskiy, Denis V.] Air Force Res Lab, Kirtland AFB, NM 87117 USA. [Cederberg, Jeffrey G.] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Albrecht, AR (reprint author), Univ New Mexico, Dept Phys & Astron, 800 Yale Blvd NE, Albuquerque, NM 87131 USA. EM albrecht@chtm.unm.edu FU Air Force Research Laboratory; DARPA; Sandia's Laboratory Directed Research and Development Office; U.S. Department of Energy's National Nuclear Security Administration [DE-AC04-94AL85000] FX Research in part was performed while DVS held a National Research Council Research Associateship Award at the Air Force Research Laboratory. This work was supported by a DARPA Seedling funding. VECSEL growth was supported by Sandia's Laboratory Directed Research and Development Office. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403144 ER PT S AU Alessi, D Spinka, T Betts, S Kanz, VK Sigurdsson, R Riordan, B Crane, JK Haefner, C AF Alessi, D. Spinka, T. Betts, S. Kanz, V. K. Sigurdsson, R. Riordan, B. Crane, J. K. Haefner, C. GP IEEE TI High Dynamic Range Temporal Contrast Measurement and Characterization of Oscillators for Seeding High Energy Petawatt Laser Systems SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA ID NATIONAL IGNITION FACILITY; PULSES; AUTOCORRELATION AB We have measured the temporal contrast and performance of oscillators to determine their feasibility for future ultra-high-contrast experiments on the Advanced Radiographic Capability at the National Ignition Facility. C1 [Alessi, D.; Spinka, T.; Betts, S.; Kanz, V. K.; Sigurdsson, R.; Riordan, B.; Crane, J. K.; Haefner, C.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Alessi, D (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA. EM alessi2@llnl.gov NR 9 TC 0 Z9 0 U1 1 U2 5 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362400425 ER PT S AU Appavoo, K Brady, NF Seo, M Nag, J Prasankumar, RP Hilton, DJ Haglund, RF AF Appavoo, Kannatassen Brady, Nathaniel F. Seo, Minah Nag, Joyeeta Prasankumar, Rohit P. Hilton, David J. Haglund, Richard F., Jr. GP IEEE TI Ultrafast Metal-Insulator Transition in VO2 Driven by Electron Injection SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB A novel all-optical method of triggering phase-transition in prototypical vanadium dioxide using the "hot-electron" effect is demonstrated. Structural and electronic switching times are retrieved by nondegenerate pump-probe transmission spectroscopy on the hybrid metallic/phase-changing nanomaterial. C1 [Appavoo, Kannatassen; Haglund, Richard F., Jr.] Vanderbilt Univ, 221 Kirkland Hall, Nashville, TN 37235 USA. [Brady, Nathaniel F.; Hilton, David J.] Univ Alabama Birmingham, Dept Phys, Birmingham, AL 35294 USA. [Seo, Minah; Prasankumar, Rohit P.] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA. [Nag, Joyeeta; Haglund, Richard F., Jr.] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. RP Appavoo, K (reprint author), Vanderbilt Univ, 221 Kirkland Hall, Nashville, TN 37235 USA. EM k.appavoo@vanderbilt.edu NR 6 TC 0 Z9 0 U1 1 U2 5 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403173 ER PT S AU Bayramian, A Aceves, S Anklam, T Baker, K Bliss, E Boley, C Bullington, A Caird, J Chen, D Deri, R Dunne, M Erlandson, A Flowers, D Henesian, M Latkowski, J Manes, K Molander, W Moses, E Powers, S Rana, S Rodriguez, S Sawicki, R Schaffers, K Seppala, L Spaeth, M Sutton, S Telford, S AF Bayramian, A. Aceves, S. Anklam, T. Baker, K. Bliss, E. Boley, C. Bullington, A. Caird, J. Chen, D. Deri, R. Dunne, M. Erlandson, A. Flowers, D. Henesian, M. Latkowski, J. Manes, K. Molander, W. Moses, E. Powers, S. Rana, S. Rodriguez, S. Sawicki, R. Schaffers, K. Seppala, L. Spaeth, M. Sutton, S. Telford, S. GP IEEE TI A Compact Line Replaceable Unit Laser Driver for Laser Inertial Fusion Energy SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA ID AVERAGE POWER AB The laser system has predicted performance of 8100-J at 16-Hz with 18% wallplug efficiency. This laser also has broad industrial applications including materials processing, and Chirped-Pulse-Amplification pump/amplifier sources which in turn can produce secondary radiation sources. C1 [Bayramian, A.; Aceves, S.; Anklam, T.; Baker, K.; Bliss, E.; Boley, C.; Bullington, A.; Caird, J.; Chen, D.; Deri, R.; Dunne, M.; Erlandson, A.; Flowers, D.; Henesian, M.; Latkowski, J.; Manes, K.; Molander, W.; Moses, E.; Powers, S.; Rana, S.; Rodriguez, S.; Sawicki, R.; Schaffers, K.; Seppala, L.; Spaeth, M.; Sutton, S.; Telford, S.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Bayramian, A (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave,L-470, Livermore, CA 94550 USA. EM bayramian1@llnl.gov RI Dunne, Mike/B-4318-2014 OI Dunne, Mike/0000-0001-8740-3870 NR 6 TC 0 Z9 0 U1 0 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362402035 ER PT S AU Biedrzycki, S Buric, M Falk, J Woodruff, S AF Biedrzycki, S. Buric, M. Falk, J. Woodruff, S. GP IEEE TI Spectrometer-less Raman detection using rotating, tunable band-pass filters SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA ID MODULATION SPECTROSCOPY; THEORETICAL DESCRIPTION; FREQUENCY-MODULATION; SCATTERING AB Rotation of thin-film, angle-tunable, band-pass filters was used to detect atmospheric-pressure nitrogen in a capillary-waveguide, Raman system. The sinusoidal rotation (frequency f) varies the center of the filters' pass-band and a 2f electrical signal was detected. C1 [Biedrzycki, S.; Buric, M.; Falk, J.; Woodruff, S.] Natl Energy Technol Lab, Morgantown, WV 26507 USA. RP Biedrzycki, S (reprint author), Natl Energy Technol Lab, 3610 Collins Ferry Rd, Morgantown, WV 26507 USA. EM falk@pitt.edu NR 7 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362401458 ER PT S AU Bugrov, A Peroz, C Dhuey, S Goltsov, A Calo, C Ivonin, I Koshelev, A Sasorov, P Cabrini, S Babin, S Yankova, V AF Bugrov, A. Peroz, C. Dhuey, S. Goltsov, A. Calo, C. Ivonin, I. Koshelev, A. Sasorov, P. Cabrini, S. Babin, S. Yankova, V. GP IEEE TI High Resolution Digital Spectrometers-on-Chip SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB Results of characterization of digital optical spectrometers-on-chip are reported. We present high resolution (up to 4x10(-5)) spectrometers fabricated on SiO2:Ge and Si3N4 planar waveguides covering the optical range from 440nm to760nm. C1 [Bugrov, A.; Goltsov, A.; Ivonin, I.; Koshelev, A.; Sasorov, P.; Yankova, V.] Nanoopt Devices, 280 S Chestnut St, Washington Township, NJ 07676 USA. [Peroz, C.; Babin, S.] ABeam Technol, Castro Valley 94546, CA USA. [Dhuey, S.; Calo, C.; Cabrini, S.] Lawrence Berkeley Natl Lab, Mol Foundry, Berkeley, CA 94720 USA. RP Bugrov, A (reprint author), Nanoopt Devices, 280 S Chestnut St, Washington Township, NJ 07676 USA. EM yankov@nanoopticdevices.com NR 2 TC 0 Z9 0 U1 1 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362401478 ER PT S AU Cho, BI Engelhorn, K Vinko, SM Wark, JS Falcone, RW Heimann, PA AF Cho, Byoung-Ick Engelhorn, Kyle Vinko, Sam M. Wark, Justin. S. Falcone, Roger. W. Heimann, Philip. A. GP IEEE TI Revealing multiphoton resonant ionization in solid density plasmas with an x-ray free electron laser SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA ID MATTER AB Interaction of intense x-ray and solid density Al plasma is studied via K-shell emission spectroscopy. A high fluence, high-intensity x-ray pulse from an x-ray free-electron laser unveils multiphoton ionization pathway and drives hidden resonances. C1 [Cho, Byoung-Ick; Engelhorn, Kyle; Falcone, Roger. W.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. [Vinko, Sam M.; Wark, Justin. S.] Univ Oxford, Dept Phys, Clarendon Lab, Oxford OX1 3PU, England. [Falcone, Roger. W.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. [Heimann, Philip. A.] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA. RP Cho, BI (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. RI Vinko, Sam/I-4845-2013; Cho, Byoung-ick/A-6294-2011 OI Vinko, Sam/0000-0003-1016-0975; NR 6 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403284 ER PT S AU Chowdhury, DR Singh, R Reiten, M Chen, HT Taylor, AJ O'Hara, JF Azad, AK AF Chowdhury, Dibakar Roy Singh, Ranjan Reiten, Matthew Chen, Hou-Tong Taylor, Antoinette J. O'Hara, John F. Azad, Abul K. GP IEEE TI Broadening of fundamental resonance via nested resonators in terahertz metamaterial SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We demonstrate broadening of fundamental resonance by successive insertion of rings inside of a split ring resonator (SRR) in a nested fashion. With the maximum inner rings, the resonance linewidth broadens by factor of four. C1 [Chowdhury, Dibakar Roy; Singh, Ranjan; Reiten, Matthew; Chen, Hou-Tong; Taylor, Antoinette J.; O'Hara, John F.; Azad, Abul K.] Los Alamos Natl Lab, Ctr Integrated Nanotechnol CINT Mat Phys & Applic, Los Alamos, NM 87545 USA. RP Chowdhury, DR (reprint author), Los Alamos Natl Lab, Ctr Integrated Nanotechnol CINT Mat Phys & Applic, Los Alamos, NM 87545 USA. EM dibakar@lanl.gov NR 5 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403254 ER PT S AU Nanote, DRCCFI Singh, R O'Hara, JF Chen, HT Taylor, AJ Azad, AK AF Chowdhury, Dibakar Roy Singh, Ranjan O'Hara, John F. Chen, Hou-Tong Taylor, Antoinette J. Azad, Abul K. GP IEEE TI Photo-doped silicon in split ring resonator gap towards dynamically reconfigurable terahertz metamaterial SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We demonstrate reconfigurable metamaterial by actively switching constituent resonators from split-ring to closed-ring configuration. Both fundamental and third order resonances damps out while the second order resonance emerges at high pump power. C1 [Chowdhury, Dibakar Roy; Singh, Ranjan; O'Hara, John F.; Chen, Hou-Tong; Taylor, Antoinette J.; Azad, Abul K.] Los Alamos Natl Lab, Ctr Integrated Nanotechnol CINT, Los Alamos, NM 87545 USA. RP Chowdhury, DR (reprint author), Los Alamos Natl Lab, Ctr Integrated Nanotechnol CINT, Los Alamos, NM 87545 USA. EM dibakar@lanl.gov NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403201 ER PT S AU Corde, S Phuoc, KT Fourmaux, S Thaury, C Lassonde, P Lebrun, G Payeur, S Martin, F Shah, RC Sebban, S Malka, V Kieffer, JC Rousse, A AF Corde, S. Phuoc, K. Ta Fourmaux, S. Thaury, C. Lassonde, P. Lebrun, G. Payeur, S. Martin, F. Shah, R. C. Sebban, S. Malka, V. Kieffer, J. C. Rousse, A. GP IEEE TI All-optical Betatron and Compton x-ray sources and application to phase contrast imaging SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB Bright femtosecond x-ray beams, with energies up to a few hundreds of keV, have been produced from Betatron oscillations and Compton scattering in a laser-plasma accelerator. The potential of Betatron radiation for phase contrast imaging has been demonstrated. (C) 2011 Optical Society of America C1 [Corde, S.; Phuoc, K. Ta; Thaury, C.; Sebban, S.; Malka, V.; Rousse, A.] Ecole Polytech, ENSTA ParisTech, CNRS,UMR7639, Lab Opt Appl, Chemin Huniere, F-91761 Palaiseau, France. [Fourmaux, S.; Lassonde, P.; Lebrun, G.; Payeur, S.; Martin, F.; Kieffer, J. C.] Univ Quebec, Inst natl Recherche Sci Enegie, Materiaux Telecommun, Varennes, PQ J3X 1S2, Canada. [Shah, R. C.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Corde, S (reprint author), Ecole Polytech, ENSTA ParisTech, CNRS,UMR7639, Lab Opt Appl, Chemin Huniere, F-91761 Palaiseau, France. RI Malka, Victor/F-5260-2010; ROUSSE, Antoine/D-2712-2009 NR 3 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403300 ER PT S AU Coslovich, G Huber, B Lee, WS Chuang, YD Zhu, Y Sasagawa, T Hussain, Z Bechtel, HA Martin, MC Schoenlein, RW Shen, ZX Kaindl, RA AF Coslovich, G. Huber, B. Lee, W. -S. Chuang, Y. -D. Zhu, Y. Sasagawa, T. Hussain, Z. Bechtel, H. A. Martin, M. C. Schoenlein, R. W. Shen, Z. -X. Kaindl, R. A. GP IEEE TI Ultrafast Dynamics of the Mid-infrared Pseudogap in Stripe-phase La1.75Sr0.25NiO4 SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We present the first ultrafast mid-infrared study of charge and spin-ordered nickelates. A multi-component dynamics is observed, evidencing the femtosecond decay and formation of the low-energy pseudogap in the optical conductivity. C1 [Coslovich, G.; Huber, B.; Zhu, Y.; Schoenlein, R. W.; Kaindl, R. A.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. [Lee, W. -S.; Shen, Z. -X.] Stanford Univ, SLAC Natl Accelerator Lab, SIMES, Menlo Pk, CA 94025 USA. [Chuang, Y. -D.; Hussain, Z.; Bechtel, H. A.; Martin, M. C.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA. [Sasagawa, T.] Tokyo Inst Technol, Mat & Struct Lab, Kanagawa 2268503, Japan. RP Coslovich, G (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. RI Sasagawa, Takao/E-6666-2014 OI Sasagawa, Takao/0000-0003-0149-6696 NR 9 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403090 ER PT S AU Dyer, GC Aizin, GR Allen, SJ Hensley, JM Casse, BDF Grine, AD Reno, JL Shaner, EA AF Dyer, Gregory C. Aizin, Gregory R. Allen, S. James Hensley, Joel M. Casse, B. D. F. Grine, Albert D. Reno, John L. Shaner, Eric A. GP IEEE TI Multi-Cavity Far Infrared 2D Plasmonic Phenomena with Inhomogeneous Screening SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We have observed coherent interaction of coupled far infrared 2D plasma cavities in a GaAs/AlGaAs FET. These results have been modeled with a transmission line formalism that treats both unscreened and screened 2D plasmons. (c) 2012 Optical Society of America C1 [Dyer, Gregory C.; Grine, Albert D.; Reno, John L.; Shaner, Eric A.] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. [Aizin, Gregory R.] CUNY, Kingsborough Coll, Brooklyn, NY 11235 USA. [Allen, S. James] Univ Calif Santa Barbara, Inst Terahertz Sci & Technol, Santa Barbara, CA 93106 USA. [Hensley, Joel M.; Casse, B. D. F.] Phys Sci Inc, New England Business Ctr 20, Andover, MA 01810 USA. RP Dyer, GC (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM gcdyer@sandia.gov NR 7 TC 0 Z9 0 U1 2 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362402165 ER PT S AU Dyer, GC Nordquist, CD Cich, MJ Grine, AD Fuller, CT Reno, JL Wanke, MC AF Dyer, Gregory C. Nordquist, Christopher D. Cich, Michael J. Grine, Albert D. Fuller, Charles T. Reno, John L. Wanke, Michael C. GP IEEE TI Rectified Diode Response of a Quantum Cascade Laser Integrated Terahertz Transceiver SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We characterized the rectified response of a diode integrated on a terahertz quantum cascade laser transceiver. The diode response is consistent with its I-V characteristics and reflects the complex Fabry-Perot laser cavity mode spectrum. (c) 2012 Optical Society of America C1 [Dyer, Gregory C.; Nordquist, Christopher D.; Cich, Michael J.; Grine, Albert D.; Fuller, Charles T.; Reno, John L.; Wanke, Michael C.] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Dyer, GC (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM gcdyer@sandia.gov NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362402167 ER PT S AU Earl, D Evans, P Grice, W Guo, DS Humble, T Martin, E Pooser, R AF Earl, D. Evans, P. Grice, W. Guo, D. -S. Humble, T. Martin, E. Pooser, R. GP IEEE TI Beam Profiler for Single-Photon Applications based on Compressive Sampling Techniques SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We report the development of a low-cost beam characterization technique appropriate for extremely low light levels. The technique makes use of compressive sampling strategies that have been developed recently for imaging applications. (C) 2011 Optical Society of America C1 [Earl, D.; Evans, P.; Grice, W.; Humble, T.; Pooser, R.] Oak Ridge Natl Lab, Computat Sci & Engn Div, Oak Ridge, TN 37831 USA. [Grice, W.; Martin, E.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. [Guo, D. -S.] Southern Univ & A&M Coll, Dept Phys, Baton Rouge, LA 70815 USA. RP Earl, D (reprint author), Oak Ridge Natl Lab, Computat Sci & Engn Div, Oak Ridge, TN 37831 USA. EM gricew@ornl.gov RI Grice, Warren/L-8466-2013 NR 3 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403020 ER PT S AU Gesuele, F Sfeir, MY Koh, WK Murray, CB Heinz, TF Wong, CW AF Gesuele, F. Sfeir, M. Y. Koh, W. -K. Murray, C. B. Heinz, T. F. Wong, C. W. GP IEEE TI Ultrafast supercontinuum spectroscopy of multiple exciton states in lead chalcogenide nanorods and nanocrystals SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA ID QUANTUM DOTS; PBSE AB We examine the multiple exciton population dynamics in lead chalcogenide nanostructures by ultrafast supercontinuum transient absorption. Carrier multiplication is revealed in the limit of low absorbed photon number, along with biexciton dynamics. C1 [Gesuele, F.; Wong, C. W.] Columbia Univ, Opt Nanostruct Lab, Ctr Integrated Sci & Engn, Solid State Sci & Engn, New York, NY 10027 USA. [Sfeir, M. Y.] Ctr Funct Nanomat, Brookhaven Natl Lab, Upton, NY 11973 USA. [Koh, W. -K.; Murray, C. B.] Univ Penn, Dept Chem, Philadelphia, PA 19104 USA. [Murray, C. B.] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA. [Heinz, T. F.] Columbia Univ, Dept Phys & Elect Engn, New York, NY 10027 USA. RP Gesuele, F (reprint author), Columbia Univ, Opt Nanostruct Lab, Ctr Integrated Sci & Engn, Solid State Sci & Engn, New York, NY 10027 USA. EM fg2251@columbia.edu; cww2104@columbia.edu RI gesuele, felice/L-1372-2015; Heinz, Tony/K-7797-2015 OI Heinz, Tony/0000-0003-1365-9464 NR 7 TC 0 Z9 0 U1 0 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403013 ER PT S AU Gilbertson, S Dakovski, GL Durakiewicz, T Zhu, JX Dani, KM Mohite, AD Dattelbaum, A Rodriguez, G AF Gilbertson, Steve Dakovski, Georgi L. Durakiewicz, Tomasz Zhu, Jian-Xin Dani, Keshav M. Mohite, Aditya D. Dattelbaum, Andrew Rodriguez, George GP IEEE TI Time Resolved Separation and Recombination of Carrier Distributions in Graphene SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB Employing the technique of time-resolved photoemission allowed the measurement of carrier distributions in graphene. An initial separation followed by an eventual coalescence of the distributions was directly observed for the first time. (C)2007 Optical Society of America C1 [Gilbertson, Steve; Dakovski, Georgi L.; Dani, Keshav M.; Dattelbaum, Andrew; Rodriguez, George] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA. [Durakiewicz, Tomasz] Los Alamos Natl Lab, Condensed Matter & Magnet Sci Mat Phys & Appl Div, Los Alamos, NM 87545 USA. [Zhu, Jian-Xin] Los Alamos Natl Lab, Phys Condensed Matter & Complex Phys Theoret Div, Los Alamos, NM 87545 USA. [Mohite, Aditya D.] Los Alamos Natl Lab, Phys Chem & Appl Spectroscopy Chem Div, Los Alamos, NM 87545 USA. RP Gilbertson, S (reprint author), Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Mat Phys & Applicat Div, Los Alamos, NM 87545 USA. EM steveg@lanl.gov RI Gilbertson, Steve/D-4229-2013; Rodriguez, George/G-7571-2012 OI Rodriguez, George/0000-0002-6044-9462 NR 2 TC 0 Z9 0 U1 1 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403139 ER PT S AU Hehlen, MP Asay, BW Parker, GR Smilowitz, LB Henson, BF AF Hehlen, Markus P. Asay, Blaine W. Parker, Gary R. Smilowitz, Laura B. Henson, Bryan F. GP IEEE TI Fiber-Optic Measurement of High Temperatures with Sub-Millimeter Spatial Resolution SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA ID THERMOMETRY AB Two-band differential luminescence thermometry is enabled by a 760-mu m long section of Yb3+, Er3+-codoped fiber in a fully integrated fiber-optic system. Temperature measurements up to 1100 degrees C with sensitivities of up to 1.4x10(-3) K-1 are demonstrated. C1 [Hehlen, Markus P.; Asay, Blaine W.; Parker, Gary R.; Smilowitz, Laura B.; Henson, Bryan F.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Hehlen, MP (reprint author), Los Alamos Natl Lab, Mailstop E549, Los Alamos, NM 87545 USA. EM hehlen@lanl.gov NR 6 TC 0 Z9 0 U1 1 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362400261 ER PT S AU Hsieh, P Chung, C Kocaman, S Biris, C Lu, M Panoiu, NC Wong, CW AF Hsieh, P. Chung, C. Kocaman, S. Biris, C. Lu, M. Panoiu, N. C. Wong, C. W. GP IEEE TI Near-field observations of self-collimation in photonic crystal superlattices SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA ID INDEX AB We present experimental observations of self-collimation effect in photonic crystal superlattices consisting of photonics crystal region and homogeneous media. The high-resolution near-field scanning optical microscopy is supported by precise nanofabrication, and rigorous 3D-FDTD simulations. (c) 2011 Optical Society of America C1 [Hsieh, P.; Kocaman, S.; Wong, C. W.] Columbia Univ, Opt Nanostruct Lab, New York, NY 10027 USA. [Chung, C.] Natl Cheng Kung Univ, Ctr Micor Nano Sci & Technol, Tainan 701, Taiwan. [Biris, C.; Panoiu, N. C.] UCL, Dept Elect & Elect Engn, Photon Grp, London WC1E 6BT, England. [Lu, M.] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA. RP Hsieh, P (reprint author), Columbia Univ, Opt Nanostruct Lab, New York, NY 10027 USA. EM ph2285@columbia.edu; cww2104@columbia.edu RI Panoiu, Nicolae-Coriolan/G-1256-2014 OI Panoiu, Nicolae-Coriolan/0000-0001-5666-2116 NR 6 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362402429 ER PT S AU Huang, CN Liu, Y AF Huang, Chunning Liu, Yun GP IEEE TI Dual Color Beam Recycling Optical Cavity Development SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB Dual color beam recycling optical cavity was proposed to provide 402.5MHz 50ps UV laser pulses with a MW level peak power applicable to the laser assisted H-beam stripping for the Spallation Neutron Source. C1 [Huang, Chunning; Liu, Yun] Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA. RP Huang, CN (reprint author), Oak Ridge Natl Lab, Spallat Neutron Source, 1 Bethel Valley Rd, Oak Ridge, TN 37831 USA. EM huangc@ornl.gov NR 1 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362402140 ER PT S AU Jun, YC Gonzales, E Reno, JL Shaner, EA Gabbay, A Brener, I AF Jun, Young Chul Gonzales, Edward Reno, John L. Shaner, Eric A. Gabbay, Alon Brener, Igal GP IEEE TI Electrically-Controlled Thermal Infrared Metamaterial Devices SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We demonstrate electrically-controlled thermal mid-infrared metamaterials using depletion-type semiconductor devices. This electrical tuning can find novel applications in chip-scale active infrared devices. C1 [Jun, Young Chul; Gonzales, Edward; Reno, John L.; Gabbay, Alon; Brener, Igal] Sandia Natl Labs, Ctr Integrated Nanotechnol CINT, POB 5800, Albuquerque, NM 87185 USA. [Shaner, Eric A.; Brener, Igal] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Jun, YC (reprint author), Sandia Natl Labs, Ctr Integrated Nanotechnol CINT, POB 5800, Albuquerque, NM 87185 USA. EM youngchul.jun@sandia.gov RI Jun, Young Chul/I-2274-2013 OI Jun, Young Chul/0000-0002-7578-8811 NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362400162 ER PT S AU Kocaman, S Aras, MS Panoiu, NC Lu, M Wong, CW AF Kocaman, S. Aras, M. S. Panoiu, N. C. Lu, M. Wong, C. W. GP IEEE TI Integrated optical filters based on negative-index photonic crystals SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA ID SUPERLATTICES AB We demonstrate chip-scale flat-top filters at near-infrared wavelengths using negative index photonic crystal based Mach Zehnder interferometers. We further show that our approach can be used to design multi-level tunable filters. C1 [Kocaman, S.; Aras, M. S.; Wong, C. W.] Columbia Univ, Opt Nanostruct Lab, New York, NY 10027 USA. [Panoiu, N. C.] UCL, Dept Elect & Elect Engn, London WC1E 6BT, England. [Lu, M.] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA. RP Kocaman, S (reprint author), Columbia Univ, Opt Nanostruct Lab, New York, NY 10027 USA. EM sk2927@columbia.edu; cww2104@columbia.edu RI Panoiu, Nicolae-Coriolan/G-1256-2014 OI Panoiu, Nicolae-Coriolan/0000-0001-5666-2116 NR 11 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362402431 ER PT S AU Lee, J Talbayev, D Xiong, J Zhu, JX Trugman, SA Jia, Q Yarotski, DA Taylor, AJ Prasankumar, RP AF Lee, J. Talbayev, D. Xiong, J. Zhu, J. -X. Trugman, S. A. Jia, Q. Yarotski, D. A. Taylor, A. J. Prasankumar, R. P. GP IEEE TI Quasiparticle Dynamics in YBCO and YBCO/LSMO Measured Using Femtosecond Optical Spectroscopy SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB Terahertz time-domain spectroscopy and temperature dependent femtosecond optical pump-probe spectroscopy are used to track quasiparticle dynamics at the interface between superconducting and ferromagnetic oxide layers. (C) 2012 Optical Society of America C1 [Lee, J.; Talbayev, D.; Jia, Q.; Yarotski, D. A.; Taylor, A. J.; Prasankumar, R. P.] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, POB 1663, Los Alamos, NM 87545 USA. [Xiong, J.; Zhu, J. -X.; Trugman, S. A.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Lee, J (reprint author), Los Alamos Natl Lab, Ctr Integrated Nanotechnol, POB 1663, Los Alamos, NM 87545 USA. EM rpprasan@lanl.gov NR 6 TC 0 Z9 0 U1 0 U2 8 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403089 ER PT S AU Lee, SH Choi, M Kim, TT Lee, S Liu, M Yin, XB Choi, HK Lee, SS Choi, CG Choi, SY Zhang, X Mi, B AF Lee, Seung Hoon Choi, Muhan Kim, Teun-Teun Lee, Seungwoo Liu, Ming Yin, Xiaobo Choi, Hong Kyw Lee, Seung S. Choi, Choon-Gi Choi, Sung-Yool Zhang, Xiang Mi, Bumki GP IEEE TI Gate-controlled Active Graphene Metamaterials SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We demonstrate an electrically controllable light-matter interaction in a gate-controlled active graphene metamaterial, which shows an electrically controlled memory effect as well as the modulation of terahertz waves in the extreme subwavelength-scale. (C) 2012 Optical Society of America C1 [Lee, Seung Hoon; Kim, Teun-Teun; Lee, Seungwoo; Lee, Seung S.; Mi, Bumki] Korea Adv Inst Sci & Technol, Dept Mech Engn, 373-1 Guseong Dong, Taejon 305701, South Korea. [Choi, Muhan; Choi, Hong Kyw] Elect & Telecommun Res Ctr ETRI, Taejon 305700, South Korea. [Liu, Ming; Yin, Xiaobo] Univ Calif Berkeley, Nanoscale Sci & Engn Ctr, Berkeley, CA 94720 USA. [Choi, Sung-Yool] Korea Adv Inst Sci & Technol, Dept Elect Engn, Taejon 305701, South Korea. [Zhang, Xiang] Lawerence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA. RP Lee, SH (reprint author), Korea Adv Inst Sci & Technol, Dept Mech Engn, 373-1 Guseong Dong, Taejon 305701, South Korea. EM bmin@kaist.ac.kr FU National Research Foundation of Korea (NRF) - Korea government (MEST) [2008-0062235, 2009-0069459, 2010-0012058, 2011-0020186, 2011-0028151] FX This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2008-0062235, 2009-0069459, 2010-0012058, 2011-0020186, and 2011-0028151 NR 4 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403171 ER PT S AU Li, CY Seletskiy, DV Cederberg, JG Sheik-Bahae, M AF Li, Chia-Yeh Seletskiy, Denis V. Cederberg, Jeffrey G. Sheik-Bahae, Mansoor GP IEEE TI Quantum-Well Electro-Absorption Sampling for Broadband THz Detection SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB Broad-band THz detection is demonstrated using GaAs/AlGaAs asymmetric double quantum-well structures. Transient electro-absorption modulation by the THz pulses is sampled coherently with detection bandwidth exceeding 10 THz. C1 [Li, Chia-Yeh; Seletskiy, Denis V.; Sheik-Bahae, Mansoor] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA. [Cederberg, Jeffrey G.] Sandia Natl Labs, Albuquerque, NM USA. [Seletskiy, Denis V.] Air Force Res Lab, Kirtland AFB, NM USA. RP Li, CY (reprint author), Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA. EM cyli@unm.edu NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403213 ER PT S AU Li, TQ Patz, A Ran, S Bud'ko, S Canfield, P Wang, JG AF Li, Tianqi Patz, Aaron Ran, Sheng Bud'ko, Sergey Canfield, Paul Wang, Jigang GP IEEE TI Dynamic decoupling of spin-lattice-charge excitations in iron pnictides using time-resolved laser ellipsometry SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We report distinct dynamics of magnetic, electronic anisotropy and charge excitations in parent and weakly Co-doped BaFe2As2, which identify the manifestation of the Ising nematic symmetry and, its contribution to magneto-structural phase transition. (C) 2011 Optical Society of America C1 [Li, Tianqi; Patz, Aaron; Ran, Sheng; Bud'ko, Sergey; Canfield, Paul; Wang, Jigang] Iowa State Univ, Ames Lab, Dept Phys & Astron, Ames, IA 50011 USA. RP Li, TQ (reprint author), Iowa State Univ, Ames Lab, Dept Phys & Astron, Ames, IA 50011 USA. RI Li, Tianqi/C-5142-2014 OI Li, Tianqi/0000-0002-5238-8540 NR 5 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403087 ER PT S AU Mahler, DH Rozema, LA Darabi, A Branczyk, AM Combes, J Ferrie, C Blume-Kohout, R James, DFV Steinberg, AM AF Mahler, D. H. Rozema, L. A. Darabi, A. Branczyk, A. M. Combes, Joshua Ferrie, Christopher Blume-Kohout, Robin James, D. F. V. Steinberg, A. M. GP IEEE TI Experimental Demonstration of Adaptive Tomography and Self-Calibrating Tomography SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA ID ENERGY-TRANSFER AB We experimentally demonstrate two new quantum tomography protocols, one of which provides a quadratic speedup using adaptation and the other of which enables tomography to be done even with uncalibrated measurement devices. (C) 2011 Optical Society of America C1 [Mahler, D. H.; Rozema, L. A.; Darabi, A.; Branczyk, A. M.; James, D. F. V.; Steinberg, A. M.] Univ Toronto, Ctr Quantum Informat & Quantum Control, Inst Opt Sci, 60 St George St, Toronto, ON M5S 1A7, Canada. [Combes, Joshua] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA. [Ferrie, Christopher] Univ Waterloo, Inst Quantum Com, Dept Appl Math, Waterloo, ON, Canada. [Blume-Kohout, Robin] Univ New Mexico, CQulC, Div Theoret, Los Alamos Natl Lab, Albuquerque, NM 87131 USA. [Mahler, D. H.; Rozema, L. A.; Darabi, A.; Branczyk, A. M.; James, D. F. V.; Steinberg, A. M.] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada. RP Mahler, DH (reprint author), Univ Toronto, Ctr Quantum Informat & Quantum Control, Inst Opt Sci, 60 St George St, Toronto, ON M5S 1A7, Canada. EM dmahler@physics.utoronto.ca RI Branczyk, Agata/C-6731-2012; James, Daniel/B-9805-2009; Ferrie, Christopher/C-8330-2014; Steinberg, Aephraim/C-3226-2008 OI Branczyk, Agata/0000-0001-9681-4671; James, Daniel/0000-0003-3981-4602; NR 6 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403252 ER PT S AU Miller, OD Ganapati, V Yablonovitch, E AF Miller, Owen D. Ganapati, Vidya Yablonovitch, Eli GP IEEE TI Inverse Design of a Nano-Scale Surface Texture for Light Trapping SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA ID LIMIT AB We introduce computational inverse design to optimize nano-scale surface textures for light trapping. The approach yields a structure with a 40.8 absorption enhancement factor, the highest reported for a high-index material in the full-wave domain. C1 [Miller, Owen D.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA. RP Miller, OD (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. EM omiller@berkeley.edu RI Miller, Owen/A-6354-2014 OI Miller, Owen/0000-0003-2745-2392 NR 5 TC 0 Z9 0 U1 0 U2 6 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362400135 ER PT S AU Miller, TA Wittenberg, J Wen, H Lindenberg, AM AF Miller, T. A. Wittenberg, J. Wen, H. Lindenberg, A. M. GP IEEE TI Ultrafast x-ray spectroscopic and scattering studies of nanoscale superionic phase transitions SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA ID CHALCOCITE; CU2S AB Ultrafast x-ray absorption spectroscopy and diffraction techniques are used to directly record the superionic structural phase transition in nanoscale copper sulfide. C1 [Miller, T. A.; Lindenberg, A. M.] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA. [Miller, T. A.; Wittenberg, J.; Lindenberg, A. M.] Stanford Univ, SLAC, PULSE, SIMES, Stanford, CA 94305 USA. [Wen, H.] Adv Photon Source, Argonne, IL 60439 USA. RP Miller, TA (reprint author), Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA. EM tamiller@stanford.edu NR 4 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362402210 ER PT S AU Nanot, S Pint, CL Cummings, AW Leonard, F Hauge, RH Kono, J AF Nanot, Sebastien Pint, Cary L. Cummings, Aron W. Leonard, Francois Hauge, Robert H. Kono, Junichiro GP IEEE TI Large Area, Broadband, and Polarization-Sensitive Photodetectors Based on Aligned Carbon Nanotubes SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We have studied the photoresponse of highly aligned carbon nanotube devices in the visible, near-infrared, and mid-infrared. Using different metal combinations for electrodes, we designed detectors that work up to 10 mu m under global illumination. C1 [Nanot, Sebastien; Pint, Cary L.; Hauge, Robert H.; Kono, Junichiro] Rice Univ, Dept Elect & Comp Engn, 6100 Main St,MS378, Houston, TX 77005 USA. [Cummings, Aron W.; Leonard, Francois] Sandia Natl Labs, Livermore, CA 94550 USA. RP Nanot, S (reprint author), Rice Univ, Dept Elect & Comp Engn, 6100 Main St,MS378, Houston, TX 77005 USA. EM sn14@rice.edu NR 5 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362402073 ER PT S AU Park, YS Chen, YF Ghosh, Y Pirytinski, A Xu, P Mack, NH Wang, HL Klimov, VI Hollingsworth, JA Htoon, H AF Park, Young-Shin Chen, Yongfen Ghosh, Yagnaseni Pirytinski, Andrei Xu, Ping Mack, Nathan H. Wang, Hsing-Ling Klimov, Victor I. Hollingsworth, Jennifer A. Htoon, Han GP IEEE TI Strong Photon Bunching in Individual Nanocrystal Quantum Dots Coupled to Rough Silver Film SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We demonstrate that sub-Poissonian statistics (photon antibunching) of photon emission from individual core-shell quantum dots can be transformed to super-Poissonian statistics (photon bunching) by coupling dots to a rough silver film. C1 [Park, Young-Shin; Chen, Yongfen; Ghosh, Yagnaseni; Hollingsworth, Jennifer A.; Htoon, Han] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, POB 1663, Los Alamos, NM 87545 USA. [Park, Young-Shin; Chen, Yongfen; Xu, Ping; Mack, Nathan H.; Wang, Hsing-Ling; Klimov, Victor I.; Htoon, Han] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. [Pirytinski, Andrei] Los Alamos Natl Lab, Div Theory, Los Alamos, NM 87545 USA. [Klimov, Victor I.] Los Alamos Natl Lab, Ctr Adv Solar Photophys, Los Alamos, NM 87545 USA. RP Park, YS (reprint author), Los Alamos Natl Lab, Ctr Integrated Nanotechnol, POB 1663, Los Alamos, NM 87545 USA. EM ypark@lanl.gov RI Xu, Ping/I-1910-2013 OI Xu, Ping/0000-0002-1516-4986 FU CINT; Alamos National Laboratory Directed Research and Development Funds; Center for Advanced Solar Photophysics, an Energy Frontier Research Center of U.S; Single-Investigator Small-Group Research Award [Single-Investigator Small-Group Research Award, (2009LANL1096] FX This work was conducted, in part, at the Center for Integrated Nanotechnologies (CINT), a U.S. Department of Energy (DOE), Office of Science (OS), Office of Basic Energy Sciences (OBES) user facility. Y.-S.P. is supported by CINT. Y.G., Y.C. and A. P. acknowledge Los Alamos National Laboratory Directed Research and Development Funds. V.I.K. is supported by the Center for Advanced Solar Photophysics, an Energy Frontier Research Center of U.S. DOE, OS, OBES. H.H. and J.A.H. acknowledge a Single-Investigator Small-Group Research Award (2009LANL1096), OBES, OS, U.S. DOE. NR 10 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403228 ER PT S AU Podolskiy, VA Wells, B Wurtz, GA Pollard, R Hendren, W Wiederrecht, GP Gosztola, DJ Zayats, AV AF Podolskiy, Viktor A. Wells, Brian Wurtz, G. A. Pollard, R. Hendren, W. Wiederrecht, G. P. Gosztola, D. J. Zayats, Anatoly V. GP IEEE TI Nonlocal optical phenomena in metamaterials SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We demonstrate excitation of additional electromagnetic waves in plasmonic nanorod metamaterials. These waves arising from a nonlocal optical response of metamaterial results in strongly enhanced ultrafast nonlinear response. (C)2010 Optical Society of America C1 [Podolskiy, Viktor A.; Wells, Brian] Univ Massachusetts Lowell, Dept Phys & Appl Phys, 1 Univ Ave, Lowell, MA 01854 USA. [Wurtz, G. A.; Zayats, Anatoly V.] Kings Coll London, Dept Phys, London, England. [Pollard, R.; Hendren, W.] Queens Univ Belfast, Ctr Nanostructured Media, Belfast BT7 1NN, Antrim, North Ireland. [Wiederrecht, G. P.; Gosztola, D. J.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA. RP Podolskiy, VA (reprint author), Univ Massachusetts Lowell, Dept Phys & Appl Phys, 1 Univ Ave, Lowell, MA 01854 USA. EM viktor_podolskiy@uml.edu RI Gosztola, David/D-9320-2011 OI Gosztola, David/0000-0003-2674-1379 FU NSF [ECCS-0724763, ECCS-1102183]; EPSRC (UK) FX This work has been partially supported by NSF grants #ECCS-0724763 and #ECCS-1102183 and EPSRC (UK) NR 13 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403198 ER PT S AU Pooser, RC Lawrie, BJ Earl, DD Humble, TS Schaake, J AF Pooser, R. C. Lawrie, B. J. Earl, D. D. Humble, T. S. Schaake, J. GP IEEE TI Real Time Quantum Imaging via Compressed Sensing SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We demonstrate quantum imaging in real time by measuring quantum noise reduction frame by frame in a moving quantum image. We obtain and reconstruct quantum images using a compressed measurement technique, demonstrating quantum compressive imaging. C1 [Pooser, R. C.; Lawrie, B. J.; Earl, D. D.] Oak Ridge Natl Lab, Computat Sci & Engn Div, Oak Ridge, TN 37831 USA. [Humble, T. S.] Oak Ridge Natl Lab, Computat Sci & Math Div, Oak Ridge, TN 37831 USA. [Schaake, J.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. RP Pooser, RC (reprint author), Oak Ridge Natl Lab, Computat Sci & Engn Div, Oak Ridge, TN 37831 USA. EM pooserrc@ornl.gov RI Lawrie, Benjamin/B-7182-2016 OI Lawrie, Benjamin/0000-0003-1431-066X NR 4 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362402060 ER PT S AU Proust, J Rumyantseva, A Gosztola, DJ Kostcheev, S Bijeon, JL Bachelot, R Wiederrecht, GP Plain, J AF Proust, Julien Rumyantseva, Anna Gosztola, David J. Kostcheev, Sergei Bijeon, Jean Louis Bachelot, Renaud Wiederrecht, Gary P. Plain, Jerome GP IEEE TI Coupling between a sub-wavelength optical cavity and a plasmonic nanostructure probed by SERS SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We report on the utilization of optical sub-wavelength quasi Fabry-Perot cavity coupled with the Raman microscopy to study the interaction between the localized surface plasmon resonance of gold nanoparticles and the surface plasmon resonance of a gold film. We show an enhancement of the Fabry-Perot oscillations when the distance between nanoparticle and gold film decrease. C1 [Proust, Julien; Rumyantseva, Anna; Kostcheev, Sergei; Bijeon, Jean Louis; Bachelot, Renaud; Plain, Jerome] Univ Technol Troyes, Lab Nanotechnol & Instrumentat Opt, Inst Charles Delaunay, UMR CNRS STMR 6279, 12 Rue Marie Curie,BP 2060, F-10010 Troyes, France. [Gosztola, David J.; Wiederrecht, Gary P.] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL USA. RP Proust, J (reprint author), Univ Technol Troyes, Lab Nanotechnol & Instrumentat Opt, Inst Charles Delaunay, UMR CNRS STMR 6279, 12 Rue Marie Curie,BP 2060, F-10010 Troyes, France. EM jerome.plain@utt.fr RI Plain, Jerome/A-2888-2009; Bachelot, Renaud/M-6888-2015; Gosztola, David/D-9320-2011 OI Gosztola, David/0000-0003-2674-1379 FU European Community FEDER fund; Region Champagne Ardennes; French National Research Agency; CNRS; U. S. Department of Energy; Office of Science; Office of Basic Energy Sciences [DE AC0 06CH11357] FX This work has been supported by the European Community FEDER fund and the Region Champagne Ardennes (Grant HYNNOV and NANOMAT ), the French National Research Agency (Grant HYNNA ANR 10 BLAN -1016) and by the PUF program. J.P roust acknowledges the financial support of the CNRS and the Region Champagne Ardennes for the PhD grant. Use of the Center for Nanoscale Materials was supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE AC0 06CH11357 NR 2 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403061 ER PT S AU Rakich, PT Reinke, C Camacho, R Davids, P Wang, Z AF Rakich, Peter T. Reinke, Charles Camacho, Ryan Davids, Paul Wang, Zheng GP IEEE TI Giant Enhancement of Stimulated Brillouin Scattering in The Sub-Wavelength Limit SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA ID WAVE-GUIDES; RADIATION PRESSURE; OPTICAL FORCES AB We show that the nature of stimulated Brillouin scattering (SBS) radically changes at nanoscales due to tremendous internal radiation pressures. Coherent interplay between radiation pressure and electrostriction yields giant enhancement of SBS and tailorable photon-phonon coupling. (C) 2009 Optical Society of America C1 [Rakich, Peter T.; Reinke, Charles; Camacho, Ryan; Davids, Paul] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. [Wang, Zheng] MIT, Cambridge, MA 02139 USA. [Wang, Zheng] Univ Texas Austin, Microelect Res Ctr, Dept Elect & Comp Engn, Austin, TX 78758 USA. RP Rakich, PT (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM rakich@alum.mit.edu NR 9 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362400268 ER PT S AU Robinson, JS Nagel, PM Harteneck, BD Abel, MJ Prell, JS Neumark, DM Pfeifer, T Leone, SR Kaindl, RA AF Robinson, Joseph S. Nagel, Phillip M. Harteneck, Bruce D. Abel, Mark J. Prell, James S. Neumark, Daniel M. Pfeifer, Thomas Leone, Stephen R. Kaindl, Robert A. GP IEEE TI Plasmon-assisted Photoemission from Gold Nanopillars in Few-cycle Laser Fields SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We report plasmon-assisted photoemission from gold nanopillars using few cycle near-IR laser pulses, along with simulations, showing strong acceleration and a scaling of the electron yield that indicates the transition into the strong-field regime. C1 [Robinson, Joseph S.; Kaindl, Robert A.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. [Nagel, Phillip M.; Abel, Mark J.; Prell, James S.; Neumark, Daniel M.; Pfeifer, Thomas; Leone, Stephen R.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Dept Chem, Chem Sci Div, Berkeley, CA 94720 USA. [Harteneck, Bruce D.] Lawrence Berkeley Natl Lab, Molecular Foundry, Berkeley, CA 94720 USA. RP Robinson, JS (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. FU NSF [CHE-0742662]; DOE [DE-AC02-05CH11231]; MURI award [FA95500410242]; NSSEFF fellowship FX M.A. and T.P. are presently with the Fritz-Haber-Institut, Berlin and Max-Planck-Institut fur Kernphysik in Heidelberg, respectively. TOF studies were supported by NSF award CHE-0742662 [PMN, SRL] and by DOE contract DE-AC02-05CH11231 [JSR, RAK] which also supported the simulations. Few-cycle instrumentation was developed via the MURI award FA95500410242. SRL acknowledges a NSSEFF fellowship. NR 7 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403197 ER PT S AU Sandberg, RL Gardner, DF Seaberg, MD Adams, DE Kapteyn, HC Murnane, MM Barber, JL AF Sandberg, Richard L. Gardner, Dennis F. Seaberg, Matthew D. Adams, Daniel E. Kapteyn, Henry C. Murnane, Margeret M. Barber, John L. GP IEEE TI Fresnel-regime Coherent Diffractive Imaging using a Tabletop Soft X-ray Source SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB Coherent x-ray diffractive imaging (CXDI) is a powerful technique for wavelength-limited, ultrafast images. We present a novel analysis and demonstration of Fresnel-regime (near field) CXDI with a tabletop 13 nm high harmonic generation source. C1 [Sandberg, Richard L.] Los Alamos Natl Lab, MPA Div, Ctr Integrated Nanotechnolgy, Los Alamos, NM 87545 USA. RP Sandberg, RL (reprint author), Los Alamos Natl Lab, MPA Div, Ctr Integrated Nanotechnolgy, POB 1663, Los Alamos, NM 87545 USA. EM sandberg@lanl.gov RI Kapteyn, Henry/H-6559-2011 OI Kapteyn, Henry/0000-0001-8386-6317 NR 5 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362400090 ER PT S AU Sandberg, RL McCulloch, Q Dattelbaum, AM Staggs, KW Rodriguez, G AF Sandberg, Richard L. McCulloch, Quinn Dattelbaum, Andrew M. Staggs, Kyle W. Rodriguez, George GP IEEE TI Nondestructive Calibration of Chirped Fiber Bragg Grating Sensors using a Fiber-Based Ultrafast Laser SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB Chirped Fiber Bragg Gratings (CFBG) sensors are powerful high-speed strain detectors for various applications like traffic monitoring or detonation measurement. Here we present a novel, non-destructive calibration for CFBGs using a femtosecond fiber laser. C1 [Sandberg, Richard L.; McCulloch, Quinn; Dattelbaum, Andrew M.; Staggs, Kyle W.; Rodriguez, George] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87544 USA. RP Sandberg, RL (reprint author), Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Bikini Atoll Rd SM 30,MS K771, Los Alamos, NM 87544 USA. EM sandberg@lanl.gov RI Rodriguez, George/G-7571-2012 OI Rodriguez, George/0000-0002-6044-9462 NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362400039 ER PT S AU Schmitt, RL Glen, CC Sickafoose, SM Shagam, RN Santarpia, J Brockman, JE Reichardt, TA Pack, MV Chavez, V Boney, C Servantes, B AF Schmitt, Randal L. Glen, Crystal C. Sickafoose, Shane M. Shagam, Richard N. Santarpia, Josh Brockman, John E. Reichardt, Thomas A. Pack, Michael V. Chavez, Victor Boney, Craig Servantes, Brandon GP IEEE TI A short-standoff bistatic lidar system for aerosol cloud backscatter cross section measurement SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB A short-standoff bistatic lidar system coupled with an aerosol chamber has been built to measure aerosol optical backscatter and laser induced fluorescence cross-sections. Preliminary results show good sensitivity across all channels with high signal-to-noise ratio. C1 [Schmitt, Randal L.; Glen, Crystal C.; Sickafoose, Shane M.; Shagam, Richard N.; Santarpia, Josh; Brockman, John E.; Reichardt, Thomas A.; Pack, Michael V.; Chavez, Victor; Boney, Craig; Servantes, Brandon] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Schmitt, RL (reprint author), Sandia Natl Labs, POB 5800,MS 1423, Albuquerque, NM 87185 USA. EM schmitt@sandia.gov NR 3 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362402132 ER PT S AU Seo, MA Yoo, J Dayeh, SA Picraux, ST Taylor, AJ Prasankumar, RP AF Seo, M. A. Yoo, J. Dayeh, S. A. Picraux, S. T. Taylor, A. J. Prasankumar, R. P. GP IEEE TI Tracking charge carriers through space and time in single silicon core-shell nanowires SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We map space-and-time-dependent carrier dynamics in single silicon nanowires firstly, using ultrafast optical microscopy. This enables us to directly measure acoustic phonon oscillations and carrier velocities in Si and Si/SiO2 core-shell nanowires. (C) 2012 Optical Society of America C1 [Seo, M. A.; Yoo, J.; Dayeh, S. A.; Picraux, S. T.; Taylor, A. J.; Prasankumar, R. P.] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA. RP Seo, MA (reprint author), Los Alamos Natl Lab, Ctr Integrated Nanotechnol, POB 1663, Los Alamos, NM 87545 USA. EM minahseo@lanl.gov NR 5 TC 0 Z9 0 U1 1 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403014 ER PT S AU Shen, YZ Yang, X Carr, GL Heese, R Hidaka, Y Murphy, JB Wang, XJ AF Shen, Yuzhen Yang, Xi Carr, G. L. Heese, Richard Hidaka, Yoshiteru Murphy, James B. Wang, Xijie GP IEEE TI Generation of Tunable Narrowband Terahertz Pulses from Coherent Transition Radiation SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We demonstrate the generation of tunable, narrow-band, few-cycle and multi-cycle terahertz pulses from a temporally modulated relativistic electron beam through coherent transition radiation. C1 [Shen, Yuzhen; Yang, Xi; Carr, G. L.; Heese, Richard; Hidaka, Yoshiteru; Murphy, James B.; Wang, Xijie] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA. RP Shen, YZ (reprint author), Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362401140 ER PT S AU Singh, R Al-Naib, IAI Yang, YP Chowdhury, DR Cao, W Rockstuhl, C Ozaki, T Morandotti, R Zhang, WL AF Singh, Ranjan Al-Naib, Ibraheem A. I. Yang, Yuping Chowdhury, Dibakar Roy Cao, Wei Rockstuhl, Carsten Ozaki, Tsuneyuki Morandotti, Roberto Zhang, Weili GP IEEE TI Electromagnetically induced transparency in an individual Fano resonator metamaterial SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We observe metamaterial induced transparency in a single Fano resonator array. In a perfect symmetric configuration, a broad dipolar resonance is excited whereas a high Q transparency window opens as the structural symmetry is broken. (C) 2012 Optical Society of America C1 [Singh, Ranjan; Chowdhury, Dibakar Roy] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, POB 1663, Los Alamos, NM 87545 USA. [Singh, Ranjan; Yang, Yuping; Cao, Wei; Zhang, Weili] Oklahoma State Univ, Sch Elect & Comp Engn, Stillwater, OK 74078 USA. [Al-Naib, Ibraheem A. I.; Ozaki, Tsuneyuki; Morandotti, Roberto] Univ Quebec, INRS EMT, Varennes, PQ J3X IS2, Canada. [Rockstuhl, Carsten] Univ Jena, Inst Condensed Matter Theory & Solid State Opt, D-07743 Jena, Germany. RP Singh, R (reprint author), Los Alamos Natl Lab, Ctr Integrated Nanotechnol, POB 1663, Los Alamos, NM 87545 USA. EM ranjan@lanl.gov RI Al-Naib, Ibraheem/A-2344-2009 NR 6 TC 0 Z9 0 U1 1 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403258 ER PT S AU Singh, R Xiong, J Azad, AK Yang, H Trugman, SA Jia, QX Taylor, AJ Chen, HT AF Singh, Ranjan Xiong, Jie Azad, Abul K. Yang, Hao Trugman, Stuart A. Jia, Q. X. Taylor, Antoinette J. Chen, Hou-Tong GP IEEE TI Ultrafast optical tuning of superconducting terahertz metamaterials SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We demonstrate the ultrafast switching and tuning of the resonance in high temperature superconducting YBCO metamaterial excited by near infrared femtosecond laser pulses. The infrared photons break the Cooper pairs thus destroys the metamaterial resonance. (C) 2012 Optical Society of America C1 [Singh, Ranjan; Xiong, Jie; Azad, Abul K.; Yang, Hao; Trugman, Stuart A.; Jia, Q. X.; Taylor, Antoinette J.; Chen, Hou-Tong] Los Alamos Natl Lab, Ctr Integrated Nanotechnol, Los Alamos, NM 87545 USA. RP Singh, R (reprint author), Los Alamos Natl Lab, Ctr Integrated Nanotechnol, POB 1663, Los Alamos, NM 87545 USA. EM ranjan@lanl.gov NR 4 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403256 ER PT S AU Urbanski, L Isoyan, A Stein, A Rocca, J Menoni, C Marconi, MC AF Urbanski, Lukasz Isoyan, Artak Stein, Aaron Rocca, Jorge Menoni, Carmen Marconi, Mario C. GP IEEE TI Defect Tolerant Extreme Ultraviolet Lithography SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We report on defect tolerant, extreme ultraviolet (EUV) lithography technique. We envision that our technique will impact both the quality and the cost of nano-fabrication with coherent EUV light. C1 [Urbanski, Lukasz; Rocca, Jorge; Menoni, Carmen; Marconi, Mario C.] Colorado State Univ, 1320 Campus Delivery, Ft Collins, CO 80523 USA. [Isoyan, Artak] Synopsys, Inc, Hillsboro, OR 97124 USA. [Stein, Aaron] Ctr Functional Nanomat, Brookhaven Natl Lab, Upton, NY 11973 USA. RP Urbanski, L (reprint author), Colorado State Univ, 1320 Campus Delivery, Ft Collins, CO 80523 USA. EM urbanski@engr.colostate.edu NR 5 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362400036 ER PT S AU van Tilborg, J Bakker, DJ Matlis, NH Leemans, WP AF van Tilborg, J. Bakker, D. J. Matlis, N. H. Leemans, W. P. GP IEEE TI Broad-bandwidth THz pulse characterization through electro-optic sampling with narrow-bandwidth probe pulses SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB A novel electro-optic THz pulse diagnostic is presented [1]. Experiments are conducted with a 0.11-THz-bandwidth optical probe on a broadband THz source (0-8 THz detection bandwidth) rich in spectral features. The validity and technical details are discussed. (C) 2011 Optical Society of America C1 [van Tilborg, J.; Bakker, D. J.; Matlis, N. H.; Leemans, W. P.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP van Tilborg, J (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM JvanTilborg@lbl.gov NR 2 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362400337 ER PT S AU Wang, Z Rakich, P AF Wang, Zheng Rakich, Peter GP IEEE TI Non-Conservative Optical Forces on Single Particle in A Single-Mode Waveguide SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA ID MANIPULATION; SYSTEMS AB Optical forces have been traditionally decomposed into gradient force and scattering force. We show the limit of this decomposition and the non-conservative nature of optical forces, even for single particle confined in a single-mode waveguide. C1 [Wang, Zheng] Univ Texas Austin, Dept Elect & Comp Engn, 1 Univ Stn,C0803, Austin, TX 78712 USA. [Rakich, Peter] Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. RP Wang, Z (reprint author), Univ Texas Austin, Dept Elect & Comp Engn, 1 Univ Stn,C0803, Austin, TX 78712 USA. EM zhwang@mit.edu; rakich@alum.mit.edu NR 7 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362401382 ER PT S AU Wierer, JJ Wang, GT Li, QM Koleske, DD Lee, SR AF Wierer, Jonathan J., Jr. Wang, George T. Li, Qiming Koleske, Daniel D. Lee, Stephen R. GP IEEE TI III-nitride nanowire array solar cells SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB III-nitride solar cells comprised of large-area arrays of GaN-InGaN core-shell nanowires electrically connected by a p-InGaN canopy are demonstrated. This proof-of-concept hybrid film-nanowire device enables various advantages including elastic strain relief within the InGaN shell. C1 [Wierer, Jonathan J., Jr.; Wang, George T.; Li, Qiming; Koleske, Daniel D.; Lee, Stephen R.] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Wierer, JJ (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM jwierer@sandia.gov NR 4 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362401113 ER PT S AU Wittenberg, J Miller, TA Wen, H Lindenberg, AM AF Wittenberg, J. Miller, T. A. Wen, H. Lindenberg, A. M. GP IEEE TI Ultrafast Optical and X-ray Probes of Nanoscale Solid-Liquid Phase Transformations SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA ID SEMICONDUCTOR NANOCRYSTALS AB Ultrafast incoherent second harmonic scattering and X-ray diffraction are used to probe the initial solid-liquid phase transformation dynamics of cadmium selenide nanocrystals. C1 [Wittenberg, J.; Miller, T. A.; Lindenberg, A. M.] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA. [Wen, H.] Adv Photon Source, Argonne, IL 60439 USA. [Wittenberg, J.; Miller, T. A.; Lindenberg, A. M.] Stanford Univ, Stanford, CA 94305 USA. RP Wittenberg, J (reprint author), Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA. EM joshw@slac.stanford.edu NR 3 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403161 ER PT S AU Wright, JB Li, QM Brener, I Luk, TS Wang, GT Chow, WW Lester, LF AF Wright, Jeremy B. Li, Qiming Brener, Igal Luk, Ting S. Wang, George T. Chow, Weng W. Lester, Luke F. GP IEEE TI Gallium Nitride Single-Mode Nanowire Lasers SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We obtained single-mode lasing in GaN nanowires by using a limited number of cavity modes and a narrow gain spectra. The fabrication was achieved by a top-down technique in high quality GaN films. C1 [Wright, Jeremy B.; Li, Qiming; Brener, Igal; Luk, Ting S.; Wang, George T.; Chow, Weng W.] Sandia Natl Labs, 1515 Eubank SE, Albuquerque, NM 87185 USA. [Brener, Igal; Luk, Ting S.] Sandia Natl Labs, Ctr Integrat Nanotechnol, Albuquerque, NM 87185 USA. [Lester, Luke F.] Univ New Mexico, Ctr High Technol Mat, Albuquerque, NM 87106 USA. RP Wright, JB (reprint author), Sandia Natl Labs, 1515 Eubank SE, Albuquerque, NM 87185 USA. EM jbwrigh@sandia.gov RI Wright, Jeremy/G-7149-2011 OI Wright, Jeremy/0000-0001-6861-930X FU U.S. Department of Energy, Office of Basic Energy Sciences at Los Alamos National Laboratory [DE-AC52-06NA25396]; Sandia National Laboratories [DEAC04-94AL85000]; U.S. Department of Energy's National Nuclear Security Administration [DEAC04-94AL85000]; Sandia's Solid-State-Lighting Science Energy Frontier Research Center FX This work was performed, in part, at the Center for Integrated Nanotechnologies, a U.S. Department of Energy, Office of Basic Energy Sciences user facility at Los Alamos National Laboratory (Contract DE-AC52-06NA25396) and Sandia National Laboratories (Contract DEAC04-94AL85000). Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DEAC04-94AL85000. Work at Sandia National Laboratories was supported by Sandia's Solid-State-Lighting Science Energy Frontier Research Center, funded by the U.S. Department of Energy, Office of Basic Energy Sciences. NR 5 TC 0 Z9 0 U1 0 U2 9 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362401101 ER PT S AU Yablonovitch, E Miller, OD AF Yablonovitch, Eli Miller, Owen D. GP IEEE TI The Opto-Electronics which Broke the Efficiency Record in Solar Cells SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB As solar cells exceed 25% efficiency, photon management becomes far more important than electronic properties. Surprisingly, maximizing external fluorescence increases efficiency, the key behind the recent single-junction efficiency record of 28.4%. C1 [Yablonovitch, Eli] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. [Miller, Owen D.] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA. RP Yablonovitch, E (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. EM eliy@eecs.berkeley.edu RI Miller, Owen/A-6354-2014 OI Miller, Owen/0000-0003-2745-2392 NR 5 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362400134 ER PT S AU Yang, XD Yao, J Rho, J Yin, XB Zhang, X AF Yang, Xiaodong Yao, Jie Rho, Junsuk Yin, Xiaobo Zhang, Xiang GP IEEE TI Three-Dimensional Nanoscale Optical Cavities of Indefinite Metamaterial SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We realize three-dimensional nanoscale optical cavities with anomalous scaling laws, by incorporating indefinite metamaterial with hyperbolic dispersion. Optical cavities with sizes down to similar to lambda/12 and high refractive index of 17.4 are demonstrated. C1 [Yang, Xiaodong; Yin, Xiaobo; Zhang, Xiang] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Yang, XD (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Mat Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM xiang@berkeley.edu NR 6 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362403115 ER PT S AU Yang, X Zhang, AY Wheeler, DA Bond, TC Gu, C Li, Y AF Yang, Xuan Zhang, Alissa Y. Wheeler, Damon A. Bond, Tiziana C. Gu, Claire Li, Yat GP IEEE TI Glucose Biosensor Based on Raman Spectroscopy and Liquid-filled Photonic Crystal Fiber SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We present the first quantitative glucose Raman detection in the physiological concentration range with a low laser power, a short integration time, and an extremely small sampling volume using the liquid-filled photonic crystal fiber probe. C1 [Yang, Xuan; Zhang, Alissa Y.; Wheeler, Damon A.; Gu, Claire; Li, Yat] Univ Calif Santa Cruz, 1156 High St, Santa Cruz, CA 95064 USA. [Yang, Xuan; Bond, Tiziana C.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Gu, C (reprint author), Univ Calif Santa Cruz, 1156 High St, Santa Cruz, CA 95064 USA. EM claire@soe.ucsc.edu; yli@chemistry.ucsc.edu FU NSF FX This work is supported by NSF. We thank Profs. Bakthan Singaram and Jin Z. Zhang for helpful discussions. NR 5 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362402105 ER PT S AU Yard, J AF Yard, Jon GP IEEE TI Quantum Channel Capacities SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA ID COMMUNICATION AB Channel capacities measure the ultimate communication abilities of noisy channels. I discuss capacities for optical channels with Gaussian noise and show the capacity for quantum information has surprising aspects that could be probed experimentally. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Yard, J (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM jtyard@gmail.com NR 2 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 1 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362401404 ER PT S AU Zhang, P Wang, S Liu, YM Yin, XB Lu, CG Chen, ZG Zhang, X AF Zhang, Peng Wang, Sheng Liu, Yongmin Yin, Xiaobo Lu, Changgui Chen, Zhigang Zhang, Xiang GP IEEE TI Dynamically routing surface plasmon polaritons along arbitrary trajectories SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA ID AIRY BEAMS; OPTICS; WAVE AB We show how surface plasmon polaritons can be routed along arbitrary trajectories by forming nondiffracting Airy beams on metal surfaces. The dynamic computer-based control over such plasmonic Airy beams is successfully demonstrated in our experiment. (C) 2012 Optical Society of America C1 [Zhang, Peng; Wang, Sheng; Liu, Yongmin; Yin, Xiaobo; Lu, Changgui; Zhang, Xiang] Univ Calif Berkeley, NSF Nanoscale Sci & Engn Ctr, 3112 Etcheverry Hall, Berkeley, CA 94720 USA. [Zhang, Peng; Chen, Zhigang] San Francisco State Univ, Dept Phys & Astron, San Francisco, CA 94132 USA. [Yin, Xiaobo; Zhang, Xiang] Lawrence Berkeley Natl Lab, Div Sci Mat, Berkeley, CA 94720 USA. [Chen, Zhigang] Nankai Univ, TEDA Appl Phys Sch, Tianjin 300457, Peoples R China. RP Zhang, P (reprint author), Univ Calif Berkeley, NSF Nanoscale Sci & Engn Ctr, 3112 Etcheverry Hall, Berkeley, CA 94720 USA. EM xiang@berkeley.edu RI Zhang, Peng/D-9624-2011 FU USARO MURI program; AFOSR; NSF; NSF Nano-scale Science and Engineering Center FX This work was supported by USARO MURI program, AFOSR, NSF, and NSF Nano-scale Science and Engineering Center. NR 13 TC 0 Z9 0 U1 0 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362402365 ER PT S AU Zheng, JJ Li, Y Aras, MS Stein, A Shepard, KL Wong, CW AF Zheng, Jiangjun Li, Ying Aras, Mehmet Sirin Stein, Aaron Shepard, Ken L. Wong, Chee Wei GP IEEE TI Parametric oscillations and phase noise of an optomechanical air-slot photonic crystal cavity SO 2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO) SE Conference on Lasers and Electro-Optics LA English DT Proceedings Paper CT Conference on Lasers and Electro-Optics (CLEO) CY MAY 06-11, 2012 CL San Jose, CA AB We demonstrated the above-threshold regenerative optomechanical behavior of an air-slot photonic crystal cavity. The experimental optomechanical coupling rate g(om)/2 pi is similar to 154 GHz/nm. The parametric oscillations and phase noise are shown. C1 [Zheng, Jiangjun; Li, Ying; Aras, Mehmet Sirin; Wong, Chee Wei] Columbia Univ, Opt Nanostruct Lab, New York, NY 10027 USA. [Stein, Aaron] Brookhaven Natl Lab, Upton, NY 11973 USA. [Shepard, Ken L.] Columbia Univ, Dept Elect Engn, New York, NY 10027 USA. RP Zheng, JJ (reprint author), Columbia Univ, Opt Nanostruct Lab, New York, NY 10027 USA. EM jz2356@columbia.edu; yl2584@columbia.edu; cww2104@columbia.edu RI Wong, Chee Wei/E-9169-2017 NR 5 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 2160-9020 BN 978-1-55752-933-6 J9 CONF LASER ELECTR PY 2012 PG 2 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BCK05 UT WOS:000310362401337 ER PT S AU Gonsalves, AJ Nakamura, K Lin, C Panasenko, D Shiraishi, S Sokollik, T Benedetti, C Schroeder, CB Geddes, CGR van Tilborg, J Osterhoff, J Esarey, E Toth, C Leemans, WP AF Gonsalves, A. J. Nakamura, K. Lin, C. Panasenko, D. Shiraishi, S. Sokollik, T. Benedetti, C. Schroeder, C. B. Geddes, C. G. R. van Tilborg, J. Osterhoff, J. Esarey, E. Toth, Cs. Leemans, W. P. BE Zgadzaj, R Gaul, E Downer, MC TI Injection and Staging for Laser Plasma Accelerators SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE plasma accelerators ID DOWNWARD DENSITY TRANSITION; ELECTRON-BEAMS; WAKEFIELD ACCELERATOR; PULSES; GENERATION AB Controlled injection and staging are critical elements to the improvement of the stability, quality, and tunability of laser plasma accelerators (LPAs) [1, 2]. This paper will discuss techniques such as colliding pulse [3], density tailoring [4, 5], and ionization injection [6, 7, 8], which have recently allowed for the generation of high-energy femtosecond electron beams with percent-level energy spread and stability, and state-of-the-art emittance. Progress on staged acceleration will also be presented, which promises to further increase beam quality, allow for mapping of the wakefield, and overcome the limit of pump depletion [9]. C1 [Gonsalves, A. J.; Nakamura, K.; Lin, C.; Panasenko, D.; Shiraishi, S.; Sokollik, T.; Benedetti, C.; Schroeder, C. B.; Geddes, C. G. R.; van Tilborg, J.; Osterhoff, J.; Esarey, E.; Toth, Cs.; Leemans, W. P.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Accelerator & Fus Res, LOASIS Program, Berkeley, CA 94720 USA. RP Gonsalves, AJ (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Accelerator & Fus Res, LOASIS Program, Berkeley, CA 94720 USA. RI Sokollik, Thomas/P-2584-2015; OI Schroeder, Carl/0000-0002-9610-0166 NR 51 TC 0 Z9 0 U1 1 U2 4 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 67 EP 75 DI 10.1063/1.4773678 PG 9 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700002 ER PT S AU Yonehara, K AF Yonehara, Katsuya BE Zgadzaj, R Gaul, E Downer, MC TI Study of High Pressure Gas Filled RF Cavities for Muon Collider SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Muon Collider; Ionization; RF Cavity AB Muon collider is a considerable candidate of the next-generation high-energy lepton collider machine. Operating an RF cavity in a multi-Tesla magnet is a critical requirement in a muon accelerator and a cooling channel. However, the maximum RF gradient in a vacuum RF cavity is strongly limited by an external magnetic field. Dense hydrogen gas filled RF cavity has been proposed since it is functional of generating a high RF accelerating gradient in a strong magnetic field and making an ionization cooling process at the same time. A critical issue of the cavity is a beam-induced plasma that consumes a considerable amount of RF power. The gas filled RF test cell was made and measured the RF loading due to a beam-induced plasma by using an intense proton beam at Fermilab. By doping an electronegative gas in dense hydrogen, the plasma loading effect is significantly mitigated. The result shows that the cavity is functional with a muon collider beam. Recent progress is shown in this presentation. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Yonehara, K (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 10 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 138 EP 146 DI 10.1063/1.4773686 PG 9 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700010 ER PT S AU Dawson, JW Crane, JK Messerly, MJ Prantil, MA Pax, PH Sridharan, AK Allen, GS Drachenberg, DR Phan, HH Heebner, JE Ebbers, CA Beach, RJ Hartouni, EP Siders, CW Spinka, TM Barty, CPJ Bayramian, AJ Haefner, LC Albert, F Lowdermilk, WH Rubenchik, AM Bonanno, RE AF Dawson, Jay W. Crane, John K. Messerly, Michael J. Prantil, Matthew A. Pax, Paul H. Sridharan, Arun K. Allen, Graham S. Drachenberg, Derrek R. Phan, Henry H. Heebner, John E. Ebbers, Christopher A. Beach, Raymond J. Hartouni, Edward P. Siders, Craig W. Spinka, Thomas M. Barty, C. P. J. Bayramian, Andrew J. Haefner, Leon C. Albert, Felicie Lowdermilk, W. Howard Rubenchik, Alexander M. Bonanno, Regina E. BE Zgadzaj, R Gaul, E Downer, MC TI High Average Power Lasers for Future Particle Accelerators SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Lasers; laser based particle accelerators; high average power lasers; fiber lasers; short pulse lasers ID CHIRPED-PULSE AMPLIFICATION; SOLID-STATE LASERS; FIBER AMPLIFIERS; SYSTEM; ENERGY; YB/YAG; KW AB Lasers are of increasing interest to the accelerator community and include applications as diverse as stripping electrons from hydrogen atoms, sources for Compton scattering, efficient high repetition rate lasers for dielectric laser acceleration, peta-watt peak power lasers for laser wake field and high energy, short pulse lasers for proton and ion beam therapy. The laser requirements for these applications are briefly surveyed. State of the art of laser technologies with the potential to eventually meet those requirements are reviewed. These technologies include diode pumped solid state lasers (including cryogenic), fiber lasers, OPCPA based lasers and Ti:Sapphire lasers. Strengths and weakness of the various technologies are discussed along with the most important issues to address to get from the current state of the art to the performance needed for the accelerator applications. Efficiency issues are considered in detail as in most cases the system efficiency is a valuable indicator of the actual ability of a given technology to deliver the application requirements. C1 [Dawson, Jay W.] Lawrence Livermore Natl Lab, Natl Ignit Facil, 7000 East Ave,L-464, Livermore, CA 94551 USA. Photon Sci Directorate, Livermore, CA 94551 USA. RP Dawson, JW (reprint author), Lawrence Livermore Natl Lab, Natl Ignit Facil, 7000 East Ave,L-464, Livermore, CA 94551 USA. RI Albert, Felicie/G-2645-2013; OI Hartouni, Edward/0000-0001-9869-4351 FU U. S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344] FX This work was performed under the auspices of the U. S. Department of Energy by Lawrence Livermore National Laboratory under contract DE-AC52-07NA27344. NR 31 TC 7 Z9 7 U1 1 U2 17 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 147 EP 153 DI 10.1063/1.4773687 PG 7 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700011 ER PT S AU Allen, B Martins, J Silva, LO Yakimenko, V Fedurin, M Kusche, K Babzien, M Huang, CK Mori, W Muggli, P AF Allen, Brian Martins, Joana Silva, Luis O. Yakimenko, Vitaly Fedurin, Mikhail Kusche, Karl Babzien, Marcus Huang, Chengkun Mori, Warren Muggli, Patric BE Zgadzaj, R Gaul, E Downer, MC TI Seeding of the Current Filamentation Instability for an Accelerator Beam in a Capillary Plasma SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE current filamentation instability; beam-plasma interaction; plasma instability; beam instability AB We show that the current filamentation instability (CFI) can be seeded by introducing a pattern in the initial transverse density distribution of an electron bunch propagating in a uniform plasma. The pattern is created by using wires that selectively scatter some of the bunch particles before the plasma. We use the code QuickPIC to study the CFI, in particular the instability growth along the plasma and the beam pattern at the plasma exit for parameters available at the BNL-ATF. Seeding leads to a larger growth rate, shorter saturation length and recognizable filament pattern. C1 [Allen, Brian; Muggli, Patric] Univ So Calif, Dept Elect Engn, Los Angeles, CA 90089 USA. [Martins, Joana; Silva, Luis O.] Inst Super Tecn, GoLP Inst Plasmas & Fusao Nucl, Lab Associado, Lisbon, Portugal. [Yakimenko, Vitaly; Fedurin, Mikhail; Kusche, Karl; Babzien, Marcus] Brookhaven Natl Lab, Upton, NY 11973 USA. [Huang, Chengkun] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. [Mori, Warren] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90024 USA. [Muggli, Patric] Max Planck Inst Phys & Astrophys, Munich, Germany. RP Allen, B (reprint author), Univ So Calif, Dept Elect Engn, Los Angeles, CA 90089 USA. RI Silva, Luis/C-3169-2009; Luis Martins, Joana/K-6610-2015 OI Silva, Luis/0000-0003-2906-924X; Luis Martins, Joana/0000-0003-2748-0377 FU NSF [0903822]; DoE [DEFG03-92ER40745]; UCLA/IST collaboration team for access to QuickPIC FX This work was supported by NSF grant 0903822 and DoE grant DEFG03-92ER40745. Simulations were conducted on HPCC at the University of Southern California and NERSC through the DoE. The authors would also like to thank the UCLA/IST collaboration team for access to QuickPIC and their support. NR 16 TC 0 Z9 0 U1 0 U2 9 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 154 EP 159 DI 10.1063/1.4773688 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700012 ER PT S AU Schroeder, CB Helle, MH AF Schroeder, Carl B. Helle, Michael H. BE Zgadzaj, R Gaul, E Downer, MC TI Summary Report of Working Group 1: Laser-Plasma Accelerators SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE laser plasma electron acceleration AB A summary is given of the presentations and discussion in the Laser-Plasma Accelerators Working Group at the 2012 Advanced Accelerator Concepts Workshop. The status, future directions, and outlook of research in laser-plasma accelerators is presented. C1 [Schroeder, Carl B.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Helle, Michael H.] Naval Res Lab, Div Plasma Phys, Washington, DC 20375 USA. RP Schroeder, CB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. OI Schroeder, Carl/0000-0002-9610-0166 FU U.S. Department of Energy, Office of Science, Office of High Energy Physics. FX We would like to gratefully acknowledge the many contributions of the participants of Working Group 1: Laser- Plasma Accelerators, and we would like to express our appreciation to the Workshop organizers. Support was provided by the U.S. Department of Energy, Office of Science, Office of High Energy Physics. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 199 EP 203 DI 10.1063/1.4773694 PG 5 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700018 ER PT S AU Bruhwiler, DL Li, ZH AF Bruhwiler, David L. Li, Zenghai BE Zgadzaj, R Gaul, E Downer, MC TI Summary Report of Working Group 2: Computations for Accelerator Physics SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE many-core computing; parallel computing; computational accelerator physics; particle accelerator modeling AB The working group on computation addressed: 1) many-core architectures, parallel programming, code optimization, and load balancing; 2) reduced algorithms for rapid simulation of laser-plasma and beam-plasma accelerators; 3) multi-physics simulations: ionization and radiation; 4) ion acceleration via laser-plasma interactions; 5) rf structure simulations: superconducting, normal conducting and hybrid metal-dielectric; 6) novel beam dynamics; 7) simulation of anti-atom traps; 8) novel algorithms; and 9) modeling needs for further advancement of high-power lasers. We review the themes and issues that emerged from the working group discussions. C1 [Bruhwiler, David L.] Univ Colorado, Ctr Integrated Plasma Studies, Boulder, CO 80309 USA. [Bruhwiler, David L.] Tech X Corp, Boulder, CO 80303 USA. [Li, Zenghai] SLAC, Menlo Pk, CA 94025 USA. RP Bruhwiler, DL (reprint author), Univ Colorado, Ctr Integrated Plasma Studies, Boulder, CO 80309 USA. OI Bruhwiler, David/0000-0002-2318-8494 NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 204 EP 210 DI 10.1063/1.4773695 PG 7 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700019 ER PT S AU Fazio, MV Anderson, SG AF Fazio, Michael V. Anderson, Scott G. BE Zgadzaj, R Gaul, E Downer, MC TI Summary Report of Working Group 3: Laser and High-Gradient Structure-Based Acceleration SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE accelerating structure; dielectric loaded structures; photonic bandgap structures; solid-state crystal structures; terahertz; inverse FELs; undulators; micro-accelerators; light sources; high gradient structures; RF sources; laser driven acceleration AB Working Group (WG) 3 assessed current challenges in developing advanced accelerators based on RF and laser-driven electromagnetic (EM) structures and surveyed the state-of-the-art research and methods addressing these challenges. A critical challenge for EM structures is the gradient limitation imposed by RF breakdown, pulsed heating, dark current, quench, thermal breakdown and other factors, depending on structure type, pulse width, duty cycle and regime of operation. Other challenges include developing approaches to reduce cost and size while at the same time greatly increasing performance. WG 3 examined a variety of approaches to the improve gradient, cost, size, and performance of advanced accelerators including dielectric loaded structures, photonic bandgap structures, solid-state crystal structures, terahertz generation technologies, inverse FELs and undulators, micro-accelerators and light sources, high gradient structures, and RF sources. These approaches cover a large range of frequencies and span a considerable parameter space including room temperature and superconducting devices, THz and optical EM, and dielectric-based structures. The state of the art was surveyed in RF source and component development, materials development, advanced micro-and nano-fabrication technologies, and surface coatings for accelerator applications. WG 3 also attempted to address challenges beyond gradient limitation, including simulation challenges, high order mode characterization, measurement, and damping, field distributions producing low emittance, power efficiency, and impact of fabrication tolerances. C1 [Fazio, Michael V.] SLAC Natl Accelerator Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. [Anderson, Scott G.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Fazio, MV (reprint author), SLAC Natl Accelerator Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 211 EP 215 DI 10.1063/1.4773696 PG 5 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700020 ER PT S AU Musumeci, P Van Tilborg, J AF Musumeci, P. Van Tilborg, J. BE Zgadzaj, R Gaul, E Downer, MC TI Summary Report of Working Group 5: Beam and Radiation Generation, Monitoring and Control SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Beam sources; Radiation Diagnostics AB This paper summarizes the activities and the discussion of Working Group 5 at the Advanced Accelerator Conceopts Workshop held in Austin, Texas, in June 2012. The themes of this working group are very broad and we have regrouped the sessions and discussions, as well as the organization of this paper, in four general topics: electron sources, phase space manipulation, diagnostics and radiation generation. Within the latter, ampler space was given to beam-based radiation sources in the spectral range where conventional light sources perform poorly, that includes the THz window and the high energy end of the electromagnetic spectrum (x-rays and gamma-rays). C1 [Musumeci, P.] UCLA Dept Phys & Astron, Los Angeles, CA USA. [Van Tilborg, J.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Musumeci, P (reprint author), UCLA Dept Phys & Astron, Los Angeles, CA USA. NR 34 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 222 EP 230 DI 10.1063/1.4773698 PG 9 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700022 ER PT S AU Tochitsky, S Hegelich, M AF Tochitsky, Sergei Hegelich, Manuel BE Zgadzaj, R Gaul, E Downer, MC TI Summary Report of Working Group 6: Laser-Plasma Acceleration of Ions SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE advanced accelerators; laser-plasma acceleration of ions ID ENERGY PROTON-BEAMS; PULSE AB This is a summary of presentations and discussions in the Laser-Plasma Acceleration of Ions Working Group at the 2012 Advanced Accelerator Concepts Workshop. Presentations on various topics of laser-driven ion acceleration in plasma are reviewed, and the status and future directions of research in this area are presented C1 [Tochitsky, Sergei] Univ Calif Los Angeles, Dept Elect Engn, Neptune Lab, Los Angeles, CA 90095 USA. [Hegelich, Manuel] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Tochitsky, S (reprint author), Univ Calif Los Angeles, Dept Elect Engn, Neptune Lab, Los Angeles, CA 90095 USA. RI Hegelich, Bjorn/J-2689-2013 FU U. S. Department of Energy [DE-FG02-92ER40727] FX Support for this work was provided by the U. S. Department of Energy under the contract No. DE-FG02-2ER40727. NR 19 TC 0 Z9 0 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 231 EP 239 DI 10.1063/1.4773699 PG 9 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700023 ER PT S AU Nagaitsev, S Berg, JS AF Nagaitsev, Sergei Berg, J. Scott BE Zgadzaj, R Gaul, E Downer, MC TI Summary Report of Working Group 7: Muon Colliders and Advanced Concepts SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE muon collider; neutrino factory; integrable optics; Penning trap; antihydrogen; positron source ID ACCELERATOR AB The primary subject of working group 7 at the 2012 Advanced Accelerator Concepts Workshop was muon accelerators for a muon collider or neutrino factory. Additionally, this working group included topics that did not fit well into other working groups. Two subjects were discussed by more than one speaker: lattices to create a perfectly integrable nonlinear lattice, and a Penning trap to create antihydrogen. C1 [Nagaitsev, Sergei] Fermilab Natl Accelerator Lab, Batavia, IL USA. [Berg, J. Scott] Brookhaven Natl Lab, Upton, NY USA. RP Nagaitsev, S (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL USA. RI Berg, Joseph/E-8371-2014 OI Berg, Joseph/0000-0002-5955-6973 NR 22 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 240 EP 245 DI 10.1063/1.4773700 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700024 ER PT S AU Gaul, E Toth, C AF Gaul, Erhard Toth, Csaba BE Zgadzaj, R Gaul, E Downer, MC TI Summary Report of Working Group 8: Laser Technology for Laser-Plasma Accelerators SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Laser; Laser particle acceleration; Laser wakefield; High power laser; High intensity laser AB Laser Technology has long been the limiting and the enabling step for laser plasma accelerators. The work presented here addressed the current and near future laser technology relevant to particle acceleration as well as laser technology challenges for future accelerator facilities. Many laser facilities are operating or will be operating shortly at high intensity, high peak power, and with good beam parameters. C1 [Gaul, Erhard] Univ Texas Austin, Ctr High Energy Dens Sci, 2511 Speedway, Austin, TX 78712 USA. [Toth, Csaba] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Gaul, E (reprint author), Univ Texas Austin, Ctr High Energy Dens Sci, 2511 Speedway, Austin, TX 78712 USA. NR 1 TC 0 Z9 0 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 246 EP 251 DI 10.1063/1.4773701 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700025 ER PT S AU Benedetti, C Schroeder, CB Esarey, E Leemans, WP AF Benedetti, C. Schroeder, C. B. Esarey, E. Leemans, W. P. BE Zgadzaj, R Gaul, E Downer, MC TI Quasi-matched propagation of high-intensity, ultra-short laser pulses in plasma channels SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE laser-plasma accelerators; laser guiding ID WAVE-GUIDE AB The propagation of a short and intense laser pulse in a plasma channel is investigated through the nonlinear paraxial wave equation. An analytic condition describing quasi-matched laser propagation (i.e., when the second order normalized-intensity-weighted transverse moment of the laser-pulse remain constant) is obtained. For any arbitrary temporal laser pulse profile and any prescribed transverse density profile in the channel, we determine the laser intensity distribution along the pulse, i.e., the slice-dependent laser waist, ensuring quasi-matched propagation. For the case of a Gaussian laser with an initially uniform spot throughout the pulse, we determine the optimal channel depth that minimizes spot size oscillations. The analytical and semi-analytical results obtained for both cases are validated through comparison with numerical simulations. C1 [Benedetti, C.; Schroeder, C. B.; Esarey, E.; Leemans, W. P.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Benedetti, C (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. OI Schroeder, Carl/0000-0002-9610-0166 NR 13 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 252 EP 257 DI 10.1063/1.4773702 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700026 ER PT S AU Chen, M Geddes, CGR Esarey, E Schroeder, CB Bulanov, SS Benedetti, C Yu, LL Rykovanov, S Leemans, WP Cormier-Michel, E Bruhwiler, DL AF Chen, M. Geddes, C. G. R. Esarey, E. Schroeder, C. B. Bulanov, S. S. Benedetti, C. Yu, L. L. Rykovanov, S. Leemans, W. P. Cormier-Michel, E. Bruhwiler, David L. BE Zgadzaj, R Gaul, E Downer, MC TI Using transverse colliding-pulse injection to obtain electron beams with small emittance in a laser-plasma accelerator SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE laser wakefield; injection; particle-in-cell simulation; ionization ID WAKEFIELD ACCELERATOR; DRIVEN; CODE AB Electron injection in a laser plasma wakefield accelerator by transverse colliding pulses is studied using two dimensional Particle-in-Cell simulations. It is demonstrated that beams with extremely small transverse emittance can be obtained, injected by the transverse standing wave created by the colliding pulses. Ionization of neutral gas is used to increase the final injection charge but keep the emittance small. C1 [Chen, M.; Geddes, C. G. R.; Esarey, E.; Schroeder, C. B.; Bulanov, S. S.; Benedetti, C.; Yu, L. L.; Rykovanov, S.; Leemans, W. P.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Cormier-Michel, E.; Bruhwiler, David L.] Tech X Corp, Boulder, CO 80303 USA. RP Chen, M (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RI Chen, Min/A-9955-2010; Yu, Lule/P-2566-2015; OI Chen, Min/0000-0002-4290-9330; Schroeder, Carl/0000-0002-9610-0166; Bruhwiler, David/0000-0002-2318-8494 FU U. S. Department of Energy; Office of National Nuclear Security Administration [NA-22]; Office of Science, Office of High Energy Physics [DE-AC02-05CH11231]; ComPASS SciDAC [DE-FC02-07ER41499]; Tech-X Corporation; National Energy Research Scientific Computing Center; Office of Science of the U. S. Department of Energy [DE-AC02-05CH11231] FX This work was supported by the U. S. Department of Energy, Office of National Nuclear Security Administration, NA- 22, and Office of Science, Office of High Energy Physics under contract No. DE-AC02-05CH11231, and via the ComPASS SciDAC project, grant No. DE-FC02-07ER41499, and by Tech-X Corporation. This work used resources of the National Energy Research Scientific Computing Center, which is supported by the Office of Science of the U. S. Department of Energy under Contract No. DE-AC02-05CH11231. The authors acknowledge useful discussions with N. Matlis. NR 33 TC 2 Z9 2 U1 0 U2 5 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 262 EP 266 DI 10.1063/1.4773704 PG 5 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700028 ER PT S AU Geddes, CGR Plateau, GR Thorn, DB Chen, M Benedetti, C Esarey, E Gonsalves, AJ Matlis, NH Nakamura, K Rykovanov, S Schroeder, CB Shiraishi, S Sokollik, T van Tilborg, J Toth, C Trotsenko, S Kim, TS Battaglia, M Stohlker, T Leemans, WP AF Geddes, C. G. R. Plateau, G. R. Thorn, D. B. Chen, M. Benedetti, C. Esarey, E. Gonsalves, A. J. Matlis, N. H. Nakamura, K. Rykovanov, S. Schroeder, C. B. Shiraishi, S. Sokollik, T. van Tilborg, J. Toth, Cs. Trotsenko, S. Kim, T. S. Battaglia, M. Stoehlker, Th. Leemans, W. P. BE Zgadzaj, R Gaul, E Downer, MC TI Low-emittance electron bunches from a laser-plasma accelerator measured using single-shot X-ray spectroscopy SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Laser Wakefield Acceleration; Low Emittance Beams; Betatron radiation ID WAKEFIELD ACCELERATOR; SYNCHROTRON-RADIATION; TERAHERTZ RADIATION; BEAMS; DRIVEN; CHANNEL AB The presence of low emittance beams in laser-plasma accelerators is indicated by single-shot spectroscopic measurements of betatron X-rays. By matching the X-ray betatron spectra to analytical and numerical models of betatron radiation, the electron bunch radius inside the plasma is estimated to be close to 0.1 micron. Correlations of the bunch radius with electron beam parameters are presented. Photon-counting spectra and statistical fitting are used to establish confidence ranges. Combined with simultaneous electron spectrum and divergence measurements, the normalized transverse emittance is estimated to be as low as 0.1 mm mrad consistent with three-dimensional particle-in-cell simulations. C1 [Geddes, C. G. R.; Plateau, G. R.; Chen, M.; Benedetti, C.; Esarey, E.; Gonsalves, A. J.; Matlis, N. H.; Nakamura, K.; Rykovanov, S.; Schroeder, C. B.; Shiraishi, S.; Sokollik, T.; van Tilborg, J.; Toth, Cs.; Kim, T. S.; Battaglia, M.; Leemans, W. P.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. [Plateau, G. R.] Ecole Polytech, F-91128 Palaiseau, France. [Thorn, D. B.] ExtreMe Matter Inst, D-64291 Darmstadt, Germany. [Thorn, D. B.; Trotsenko, S.] GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany. [Trotsenko, S.] Helmholtz Inst Jena, D-07743 Jena, Germany. [Battaglia, M.] SCIPP, Santa Cruz, CA 95064 USA. [Stoehlker, Th.] GSI Helmholtzzentrum Schwerionenforsch, Inst Jena, D-64291 Darmstadt, Germany. [Leemans, W. P.] Univ Calif Berkeley, Berkeley, CA 94720 USA. RP Geddes, CGR (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. RI Chen, Min/A-9955-2010; Sokollik, Thomas/P-2584-2015; OI Chen, Min/0000-0002-4290-9330; Schroeder, Carl/0000-0002-9610-0166 FU Director, Office of Science; Office of High Energy Physics; U. S. Dept. of Energy [DE-AC02-05CH11231, DOE NNSA NA-22]; NSF [PHY-0917687, 0614001]; NERSC FX The authors thank the LOASIS team at LBNL, as well as the VORPAL team at Tech- X and the Helmholtz Alliance HA216/ EMMI. This work was supported by the Director, Office of Science, Office of High Energy Physics, U. S. Dept. of Energy under Contract no. DE-AC02-05CH11231, DOE NNSA NA- 22, and NSF Grants PHY-0917687 and 0614001, and used computation at NERSC. NR 40 TC 0 Z9 0 U1 0 U2 5 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 278 EP 283 DI 10.1063/1.4773707 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700031 ER PT S AU Matlis, NH Axley, A Leemans, WP AF Matlis, N. H. Axley, A. Leemans, W. P. BE Zgadzaj, R Gaul, E Downer, MC TI Spectral Multiplexing for Single-shot Ultrafast Tomographic Imaging SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Tomography; Laser; Plasma; Interferometry; Single-shot AB We demonstrate, for the first time, single-shot, ultrafast computed-tomography reconstructions using a new technique of spectral multiplexing. High-precision, picosecond-resolved, position and morphology measurements of a heterogeneous plasma object are presented. C1 [Matlis, N. H.; Axley, A.; Leemans, W. P.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Matlis, NH (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. NR 5 TC 0 Z9 0 U1 1 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 301 EP 303 DI 10.1063/1.4773711 PG 3 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700035 ER PT S AU Shaw, B van Tilborg, J Gonsalves, A Nakamura, K Sokollik, T Shiraishi, S Mittal, R Esarey, E Schroeder, C Toth, C Leemans, WP AF Shaw, B. van Tilborg, J. Gonsalves, A. Nakamura, K. Sokollik, T. Shiraishi, S. Mittal, R. Esarey, E. Schroeder, C. Toth, C. Leemans, W. P. BE Zgadzaj, R Gaul, E Downer, MC TI Undulator Radiation from Laser-Plasma-Accelerated Electron Beams SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Laser-Plasma Acceleration; Undulator; XUV Spontaneous Emission Measurements; Electron Beam Diagnostics; Electron Beam Emittance; Electron Beam Energy Spread ID DRIVEN AB Recent experiments coupled electron beams from the LOASIS TREX laser plasma accelerator (LPA) [1, 2, 3] to the Tapered Hybrid Undulator (THUNDER). Using the 1.5m, 66 period undulator, followed by an XUV spectrometer, spontaneous radiation was observed at photon energies extending to 100 eV. Previous experiments have reported visible [4] and soft-x-ray [5] radiation. The purpose of our experiments is to do highly precise, single shot diagnostics of the energy spread and emittance for each electron beam. We present recent results including measurements of electron beam transport through the undulator with and without the use of permanent magnetic quadrapoles, and measurements of XUV spectra up to 100 eV from LPA produced e-beams C1 [Shaw, B.; van Tilborg, J.; Gonsalves, A.; Nakamura, K.; Sokollik, T.; Shiraishi, S.; Mittal, R.; Esarey, E.; Schroeder, C.; Toth, C.; Leemans, W. P.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, LOASIS Program, Berkeley, CA 94720 USA. RP Shaw, B (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, LOASIS Program, Berkeley, CA 94720 USA. RI Sokollik, Thomas/P-2584-2015; OI Schroeder, Carl/0000-0002-9610-0166 NR 8 TC 2 Z9 2 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 310 EP 314 DI 10.1063/1.4773713 PG 5 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700037 ER PT S AU Shiraishi, S Sokollik, T Benedetti, C Gonsalves, AJ Nakamura, K Shaw, BH van Tilborg, J Geddes, CGR Schroeder, CB Toth, C Esarey, E Leemans, WP AF Shiraishi, S. Sokollik, T. Benedetti, C. Gonsalves, A. J. Nakamura, K. Shaw, B. H. van Tilborg, J. Geddes, C. G. R. Schroeder, C. B. Toth, Cs. Esarey, E. Leemans, W. P. BE Zgadzaj, R Gaul, E Downer, MC TI Recent Progress on Staging Laser-Plasma Accelerators SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Laser-plasma accelerator; staged acceleration; capillary discharge waveguide; optical spectra ID PULSES AB Recent progress on a staged laser-plasma accelerator (LPA) experiment is reported. The experiment utilizes a 40 TW class laser which is split into two laser pulses. The first laser drives the first LPA module to produce an electron beam. The second laser drives the second LPA module in a dark-current free regime and accelerates the electron beam from the first LPA. Injection from the first stage, triggering of plasma mirror and reflection of the second laser, and laser guiding in the second stage with the laser pulses reflected off the plasma mirror has been successfully demonstrated. Optical spectral redshift of driving laser is analyzed to estimate the wakefield amplitude and electron energy gain in the second stage. C1 [Shiraishi, S.; Sokollik, T.; Benedetti, C.; Gonsalves, A. J.; Nakamura, K.; Shaw, B. H.; van Tilborg, J.; Geddes, C. G. R.; Schroeder, C. B.; Toth, Cs.; Esarey, E.; Leemans, W. P.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, LOASIS Program, Berkeley, CA 94720 USA. RP Shiraishi, S (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, LOASIS Program, Berkeley, CA 94720 USA. RI Sokollik, Thomas/P-2584-2015; OI Schroeder, Carl/0000-0002-9610-0166 NR 18 TC 0 Z9 0 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 321 EP 326 DI 10.1063/1.4773715 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700039 ER PT S AU Sokollik, T Shiraishi, S Shaw, B Gonsalves, A Nakamura, K van Tilborg, J Esarey, E Schroeder, CB Benedetti, C Toth, C Leemans, W AF Sokollik, Thomas Shiraishi, Satomi Shaw, Brian Gonsalves, Antony Nakamura, Kei van Tilborg, Jeroen Esarey, Eric Schroeder, Carl B. Benedetti, Carlo Toth, Csaba Leemans, Wim BE Zgadzaj, R Gaul, E Downer, MC TI Staged Laser Plasma Accelerators SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE staged electron acceleration; tape drive plasma mirror ID ELECTRON-ACCELERATORS AB We present current results on staged electron acceleration in the LOASIS program at the Lawrence Berkeley National Laboratory. The goal is to experimentally demonstrate laser driven electron acceleration in two stages, where each stage is driven by a separate laser pulse. This technology could provide the key to built compact laser driven accelerators which could potentially reach up to TeV in electron energy. C1 [Sokollik, Thomas; Shiraishi, Satomi; Shaw, Brian; Gonsalves, Antony; Nakamura, Kei; van Tilborg, Jeroen; Esarey, Eric; Schroeder, Carl B.; Benedetti, Carlo; Toth, Csaba; Leemans, Wim] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, LOASIS Program, Berkeley, CA 94720 USA. RP Sokollik, T (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, LOASIS Program, 1 Cyclotron Rd, Berkeley, CA 94720 USA. RI Sokollik, Thomas/P-2584-2015; OI Schroeder, Carl/0000-0002-9610-0166 NR 9 TC 0 Z9 0 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 327 EP 329 DI 10.1063/1.4773716 PG 3 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700040 ER PT S AU Arefiev, AV Schollmeier, M Khudik, VN AF Arefiev, Alexey V. Schollmeier, Marius Khudik, Vladimir N. BE Zgadzaj, R Gaul, E Downer, MC TI Parametric Amplification of Laser-Driven Acceleration in a Plasma Channel SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE laser-driven acceleration; betatron resonance; preplasma; parametric amplification; plasma channel ID PULSES; GENERATION; BEAMS AB Two-dimensional particle-in-cell simulations are presented for a laser-irradiated solid-density target with and without an underdense preplasma. It is shown that an underdense preplasma can generate an energetic electron tail in addition to the warm electrons generated at the critical surface. Preplasma electrons are accelerated in a quasi-static positively charged channel formed by the laser. At ultra-relativistic laser intensities (a(0) = 10), the acceleration mechanism is not sensitive to the laser polarization. An energetic tail with energies significantly exceeding the energy expected for a single electron in a vacuum is present in simulations with s and p-polarized beams. This suggests that the mechanism of parametric amplification of laser-driven electron acceleration is a likely explanation for the observed phenomenon. C1 [Arefiev, Alexey V.; Khudik, Vladimir N.] Univ Texas Austin, Inst Fus Studies, Austin, TX 78712 USA. [Schollmeier, Marius] Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Arefiev, AV (reprint author), Univ Texas Austin, Inst Fus Studies, Austin, TX 78712 USA. RI Schollmeier, Marius/H-1056-2012; Arefiev, Alexey/A-8550-2016 OI Schollmeier, Marius/0000-0002-0683-022X; Arefiev, Alexey/0000-0002-0597-0976 FU Sandia National Laboratory [PO 990947]; National Nuclear Security Administration [DE-FC52-08NA28512]; U. S. Department of Energy [DE-FG02-04ER54742] FX The simulations were performed using the Plasma Simulation Code ( PSC), which was provided to the authors by Dr. H. Ruhl and Dr. A. Kemp. The authors acknowledge the Texas Advanced Computing Center at The University of Texas at Austin for providing HPC resources that have contributed to the research results reported within this paper. This work was supported by Sandia National Laboratory Contract No. PO 990947, National Nuclear Security Administration Contract No. DE-FC52-08NA28512, and U. S. Department of Energy Contract No. DE-FG02- 04ER54742. Sandia is operated by Lockheed Martin Corp. for the U. S. DOE NNSA under contract No. DE- AC04- 94AL85000. NR 20 TC 4 Z9 4 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 363 EP 368 DI 10.1063/1.4773723 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700047 ER PT S AU Cormier-Michel, E Bruhwiler, DL Hallman, EJ Cowan, BM Cary, JR Geddes, CGR Vay, JL Esarey, E Schroeder, CB Leemans, WP AF Cormier-Michel, Estelle Bruhwiler, David L. Hallman, Eric J. Cowan, Benjamin M. Cary, John R. Geddes, Cameron G. R. Vay, Jean-Luc Esarey, Eric Schroeder, Carl B. Leemans, Wim P. BE Zgadzaj, R Gaul, E Downer, MC TI Low noise Particle-In-Cell simulations of 10 GeV laser-plasma accelerator stages SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Plasma accelerator; laser-plasma acceleration; boosted frame; PIC; numerical noise ID CODE AB Because of their ultra-high accelerating gradient, laser plasma based accelerators (LPA) are contemplated for the next generation of high-energy colliders and light sources. The upcoming BELLA project will explore acceleration of electron bunches to 10 GeV in a 1 meter long plasma, where a wakefield is driven by a PW-class laser. Particle-in-cell (PIC) simulations are used to design LPA stages relevant to the upcoming experiments. Simulations in a Lorentz boosted frame are used to gain significant speed up and to simulate the 10 GeV stages at full scale parameters, otherwise impractical. As criteria on energy spread and beam emittance become more stringent, PIC simulations become more challenging as high frequency noise artificially increases those quantities. To reduce numerical noise, we consider using a Poisson solve to calculate the beam self-fields. This method allows correct cancelation of the beam transverse self-forces and prevents artificial emittance growth for a matched beam in a linear focusing field. C1 [Cormier-Michel, Estelle; Bruhwiler, David L.; Hallman, Eric J.; Cowan, Benjamin M.; Cary, John R.] Tech X Corp, 5621 Arapahoe Ave,Suite A, Boulder, CO 80303 USA. [Geddes, Cameron G. R.; Vay, Jean-Luc; Esarey, Eric; Schroeder, Carl B.; Leemans, Wim P.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Cormier-Michel, E (reprint author), Tech X Corp, 5621 Arapahoe Ave,Suite A, Boulder, CO 80303 USA. OI Schroeder, Carl/0000-0002-9610-0166; Bruhwiler, David/0000-0002-2318-8494 FU US DOE office of science; office of High- Energy Physics [DE-FC02-07ER41499, DE-SC0004441, DE-AC02-05CH11231]; National Energy Research Scientific Computing Center; US DOE Office of Science [DE-AC02-05CH11231] FX This work was supported by the US DOE office of science, office of High- Energy Physics under grants numbers DE-FC02-07ER41499 (SciDAC-2; ComPASS Project), DE-SC0004441 (SBIR), and DE-AC02-05CH11231 ( LBNL). This research used resources of the National Energy Research Scientific Computing Center, which is supported by US DOE Office of Science under Contract No. DE-AC02-05CH11231. NR 19 TC 1 Z9 1 U1 0 U2 10 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 369 EP 374 DI 10.1063/1.4773724 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700048 ER PT S AU Rykovanov, SG Chen, M Geddes, CGR Schroeder, CB Esarey, E Leemans, WP AF Rykovanov, S. G. Chen, M. Geddes, C. G. R. Schroeder, C. B. Esarey, E. Leemans, W. P. BE Zgadzaj, R Gaul, E Downer, MC TI Virtual Detector of Synchrotron Radiation (VDSR) - a C plus plus parallel code for particle tracking and radiation calculation SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Laser Wakefield Acceleration; Betatron radiation; Particle tracking; Synchrotron radiation ID ELECTRON-BEAMS; PLASMA; ACCELERATOR AB The Virtual Detector for Synchrotron Radiation (VDSR) is a parallel C++ code developed to calculate the incoherent radiation from a single charged particle or a beam moving in given external electro-magnetic fields. In this proceedings the code structure and features are introduced. An example of radiation generation from the betatron motion of a beam in the focusing fields of the wake in a laser-plasma accelerator is presented. C1 [Rykovanov, S. G.; Chen, M.; Geddes, C. G. R.; Schroeder, C. B.; Esarey, E.; Leemans, W. P.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Rykovanov, SG (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. RI Chen, Min/A-9955-2010; OI Chen, Min/0000-0002-4290-9330; Schroeder, Carl/0000-0002-9610-0166 NR 13 TC 0 Z9 0 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 399 EP 403 DI 10.1063/1.4773729 PG 5 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700053 ER PT S AU Antipov, S Jing, CG Schoessow, P Kanareykin, A Jiang, B Yakimenko, V Zholents, A Gai, W AF Antipov, Sergey Jing, Chunguang Schoessow, Paul Kanareykin, Alexei Jiang, Bo Yakimenko, Vitaly Zholents, Alexander Gai, Wei BE Zgadzaj, R Gaul, E Downer, MC TI Terahertz Radiation Source Based on Self-Wake Beam Bunching SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE advanced accelerator concepts; beam driven radiation sources AB A table top device for producing high power T-ray beams is described. A rectangular electron beam that can be produced out of a photoinjector via stacking of the laser pulse, and running off-crest of the photoinjector rf is sent through a dielectric loaded waveguide. Due to the beam's self-wake its energy becomes modulated. In the chicane beamline following the dielectric energy-bunching section this energy modulation is converted to a density modulation-a bunch train. The density modulated beam can be sent through a power extraction section, like a dielectric loaded accelerating structure, or simply can intercept a foil target, producing THz radiation of various bandwidths and power levels. C1 [Antipov, Sergey; Jing, Chunguang; Schoessow, Paul; Kanareykin, Alexei] Euclid Techlabs LLC, Solon, OH 44139 USA. [Jiang, Bo] Shanghai Inst Appl Phys, Shanghai, Peoples R China. [Yakimenko, Vitaly] Brookhaven Natl Lab, Upton, NY 11973 USA. [Zholents, Alexander; Gai, Wei] Argonne Natl Lab, Argonne, IL 60439 USA. RP Antipov, S (reprint author), Euclid Techlabs LLC, Solon, OH 44139 USA. FU DOE SBIR [DE- SC0006299] FX This work is supported by DOE SBIR grant DE- SC0006299 ( Euclid Techlabs LLC). NR 21 TC 2 Z9 2 U1 0 U2 5 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 421 EP 424 DI 10.1063/1.4773733 PG 4 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700057 ER PT S AU Arsenyev, SA Simakov, EI AF Arsenyev, Sergey A. Simakov, Evgenya I. BE Zgadzaj, R Gaul, E Downer, MC TI The Design of a Five-Cell Superconducting RF Module with a PBG Coupler Cell SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Photonic Band Gap; Photonic crystal; Linear accelerator; Superconducting RF AB We discuss the problem of incorporating a Photonic Band Gap (PBG) cell into a superconducting accelerating module of 5 cells designed for the operational frequency of 2.1 GHz. The reason for using a PBG cell is to provide a good accelerating mode confinement and good Higher Order Mode (HOM) suppression. PBG cell can potentially be used for placing HOM and fundamental mode couplers. However, because of the naturally higher ratio of the peak magnetic field to the accelerating field in the PBG cell, it should be designed to operate at a lower accelerating gradient than the other cells of the module. This ensures that the probability of quench in the PBG cell would be no higher than in other elliptical cells of the structure. C1 [Arsenyev, Sergey A.] MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA. [Simakov, Evgenya I.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Arsenyev, SA (reprint author), MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA. FU U. S. Department of Energy ( DOE) Office of Science Early Career Research Program FX We would like to acknowledge people who helped this work: F. Krawczyk, H. Min, B. Munroe, E. Nanni, M. Shapiro, D. Shchegolkov and R. Temkin. This work is supported by the U. S. Department of Energy ( DOE) Office of Science Early Career Research Program. NR 10 TC 2 Z9 2 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 425 EP 430 DI 10.1063/1.4773734 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700058 ER PT S AU Duris, J Li, RK Musumeci, P Sakai, Y Threlkeld, E Williams, O Fedurin, M Kusche, K Pogorelsky, I Polyanskiy, M Yakimenko, V AF Duris, J. Li, R. K. Musumeci, P. Sakai, Y. Threlkeld, E. Williams, O. Fedurin, M. Kusche, K. Pogorelsky, I. Polyanskiy, M. Yakimenko, V. BE Zgadzaj, R Gaul, E Downer, MC TI Preparations for a High Gradient Inverse Free Electron Laser Experiment at Brookhaven National Laboratory SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Inverse Free Electron Laser Acceleration AB Preparations for an inverse free electron laser experiment at Brookhaven National Laboratory's Accelerator Test Facilty are presented. Details of the experimental setup including beam and laser transport optics are first discussed. Next, the driving laser pulse structure is investigated and initial diagnostics are explored and compared to simulations. Finally, planned improvements to the experimental setup are discussed. C1 [Duris, J.; Li, R. K.; Musumeci, P.; Sakai, Y.; Threlkeld, E.; Williams, O.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. [Fedurin, M.; Kusche, K.; Pogorelsky, I.; Polyanskiy, M.; Yakimenko, V.] Brookhaven Natl Lab, Accelerator Test Facil, Upton, NY 11973 USA. RP Duris, J (reprint author), Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. RI Polyanskiy, Mikhail/E-8406-2010 FU DOE [DE- FG02-92ER40693]; Defense Threat Reduction Angency award [HDTRA1-10-0073] FX This work was supported by DOE grant DE- FG02-92ER40693 and Defense Threat Reduction Angency award HDTRA1-10-0073. NR 8 TC 1 Z9 1 U1 0 U2 5 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 440 EP 445 DI 10.1063/1.4773737 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700061 ER PT S AU Jiang, Y Shchelkunov, S Yakovlev, VP Solyak, N Kuzikov, SV Hirshfield, JL AF Jiang, Y. Shchelkunov, S. Yakovlev, V. P. Solyak, N. Kuzikov, S. V. Hirshfield, J. L. BE Zgadzaj, R Gaul, E Downer, MC TI Multi-Harmonic RF Test Stand For RF Breakdown Studies SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE RF Source; multi-frequency; multi-harmonic; RF breakdown AB A multi-harmonic RF test stand is under construction at Yale Beam Physics Laboratory. It includes a frequency multiplier which can generate high power harmonics efficiently that are phase locked to the fundamental drive frequency. In a bi-modal asymmetric cavity powered by this RF source, the cavity may experience reduced exposure time to peak fields and sweeping of peak fields across their surfaces, and strong asymmetry between surfaces that may experience cathode- and anode-like fields; these phenomena are to be assessed for their influence on RF breakdown probabilities. C1 [Jiang, Y.; Shchelkunov, S.; Hirshfield, J. L.] Yale Univ, Beam Phys Lab, New Haven, CT 06511 USA. [Yakovlev, V. P.; Solyak, N.; Kuzikov, S. V.; Hirshfield, J. L.] Omega P Inc, New Haven, CT 06510 USA. [Yakovlev, V. P.; Solyak, N.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Institute Appl Phys, Nizhny Novgorod, Nizhny, Russia. RP Jiang, Y (reprint author), Yale Univ, Beam Phys Lab, New Haven, CT 06511 USA. EM yong.jiang@aya.yale.edu FU U. S. Department of Energy, Office of High Energy Physics FX Work is supported in part by the U. S. Department of Energy, Office of High Energy Physics. NR 7 TC 0 Z9 0 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 452 EP 457 DI 10.1063/1.4773739 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700063 ER PT S AU Rosenzweig, JB Arab, E Andonian, G Cahill, A Fitzmorris, K Fukusawa, A Hoang, P Jovanovic, I Marcus, G Marinelli, A Murokh, A Musumeci, P Naranjo, B O'Shea, B O'Shea, F Ovodenko, A Pogorelsky, I Putterman, S Roberts, K Shumail, M Tantawi, S Valloni, A Yakimenko, V Xu, G AF Rosenzweig, J. B. Arab, E. Andonian, G. Cahill, A. Fitzmorris, K. Fukusawa, A. Hoang, P. Jovanovic, I. Marcus, G. Marinelli, A. Murokh, A. Musumeci, P. Naranjo, B. O'Shea, B. O'Shea, F. Ovodenko, A. Pogorelsky, I. Putterman, S. Roberts, K. Shumail, M. Tantawi, S. Valloni, A. Yakimenko, V. Xu, G. BE Zgadzaj, R Gaul, E Downer, MC TI The GALAXIE All-Optical FEL Project SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE dielectric laser accelerator; photonics; undulator; infra-red ID FREE-ELECTRON LASER AB We describe a comprehensive project, funded under the DARPA AXiS program, to develop an all-optical table-top X-ray FEL based on dielectric acceleration and electromagnetic undulators, yielding a compact source of coherent X-rays for medical and related applications. The compactness of this source demands that high field (>GV/m) acceleration and undulation-inducing fields be employed, thus giving rise to the project's acronym: GV/m AcceLerator And X-ray Integrated Experiment (GALAXIE). There are numerous physics and technical hurdles to surmount in this ambitious scenario, and the integrated solutions include: a biharmonic photonic TW structure, 200 micron wavelength electromagnetic undulators, 5 mu m laser development, ultra-high brighness magnetized/asymmetric emittance electron beam generation, and SASE FEL operation. We describe the overall design philosophy of the project, the innovative approaches to addressing the challenges presented by the design, and the significant progress towards realization of these approaches in the nine months since project initialization. C1 [Rosenzweig, J. B.; Arab, E.; Andonian, G.; Cahill, A.; Fitzmorris, K.; Fukusawa, A.; Hoang, P.; Marcus, G.; Marinelli, A.; Musumeci, P.; Naranjo, B.; O'Shea, B.; O'Shea, F.; Putterman, S.; Roberts, K.; Valloni, A.] Univ Calif Los Angeles, Dept Phys & Astron, 405 Hilgard Ave, Los Angeles, CA 90034 USA. [Arab, E.; Shumail, M.; Tantawi, S.] Brookhaven Natl Lab, Accelerator Test Facil, Upton, NY 11973 USA. [Jovanovic, I.; Xu, G.] Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA. [Murokh, A.] RadiaBeam Technol, Santa Monica, CA 90404 USA. [Xu, G.] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA. RP Rosenzweig, JB (reprint author), Univ Calif Los Angeles, Dept Phys & Astron, 405 Hilgard Ave, Los Angeles, CA 90034 USA. FU DARPA [N66001-11-1-4197]; U. S. Department of Energy [DE-FG02-07ER46272, DE-FG03-92ER40693]; Office of Naval Research [ONR N00014-06-1-0925]; Defense Threat Reduction Agency [HDTRA1-10-1-0073] FX This work supported by DARPA under Contracts N66001-11-1-4197, the U. S. Department of Energy under Contracts Nos. DE-FG02-07ER46272 and DE-FG03-92ER40693, and the Office of Naval Research under Contract No. ONR N00014-06-1-0925, and the Defense Threat Reduction Agency under Contract No. HDTRA1-10-1-0073. NR 14 TC 7 Z9 7 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 493 EP 498 DI 10.1063/1.4773746 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700070 ER PT S AU Shchelkunov, SV LaPointe, MA Jiang, Y Hirshfield, JL Yakovlev, VP AF Shchelkunov, S. V. LaPointe, M. A. Jiang, Y. Hirshfield, J. L. Yakovlev, V. P. BE Zgadzaj, R Gaul, E Downer, MC TI Modified Magnicon for High-Gradient Accelerator R&D SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE RF; amplifiers; generators; sources; high power; high frequency; Ka-band microwave technology; magnicon AB A design is presented of a modified 34.3 GHz magnicon amplifier with a TE311-mode output cavity, to replace the existing magnicon at Yale Beam Physics Lab Test Facility whose output cavity operates in the TM310 mode. The main goal for the new design is to achieve robust day-to-day reliable operation at pulsed power levels up to 25 MW. C1 [Shchelkunov, S. V.; LaPointe, M. A.; Jiang, Y.; Hirshfield, J. L.] Yale Univ, Dept Phys, New Haven, CT 06520 USA. [Hirshfield, J. L.; Yakovlev, V. P.] Omega P Inc, New Haven, CT USA. [Yakovlev, V. P.] Fermilab Natl Accelerator Lab, Batavia, IL USA. RP Shchelkunov, SV (reprint author), Yale Univ, Dept Phys, New Haven, CT 06520 USA. RI Jiang, Yong/A-8956-2013 OI Jiang, Yong/0000-0002-5659-6953 FU US DoE FX This work was supported by US DoE. NR 3 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 499 EP 504 DI 10.1063/1.4773747 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700071 ER PT S AU de la Ossa, AM Gross, M Gruner, F Khojoyan, M Krasilnikov, M Oppelt, A Stephan, F Schroeder, CB Osterhoff, J AF de la Ossa, A. Martinez Gross, M. Gruener, F. Khojoyan, M. Krasilnikov, M. Oppelt, A. Stephan, F. Schroeder, C. B. Osterhoff, J. BE Zgadzaj, R Gaul, E Downer, MC TI Self-modulation of long electron beams in plasma at PITZ SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Plasma acceleration; beam-driven; self-modulation; long beam; PITZ ID WAKEFIELD ACCELERATOR AB The Photo Injector Test facility at DESY, Zeuthen site (PITZ), offers the unique possibility to study and demonstrate the self-modulation of long electron bunches in plasma. A set of numerical simulations with the particle-in-cell code OSIRIS has been carried out for a better understanding of the process. Of particular interest is the measurement of the energy modulation induced to the beam itself by means of the generated wakefields in plasma. It will reflect the key properties of the accelerating electric fields such as their magnitude and their phase velocity, both of significant importance in the design of experiments relying on this technique. C1 [de la Ossa, A. Martinez; Gross, M.; Khojoyan, M.; Krasilnikov, M.; Oppelt, A.; Stephan, F.] Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany. [Gruener, F.; Osterhoff, J.] Univ Hamburg, Inst Experimentalphys, D-22761 Hamburg, Germany. [Schroeder, C. B.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP de la Ossa, AM (reprint author), Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany. OI Schroeder, Carl/0000-0002-9610-0166 FU Helmholtz Alliance "Physics at the Terascale"; U.S. Department of Energy [E-AC02-05CH11231] FX This project was funded by the Helmholtz Alliance "Physics at the Terascale". We thank the OSIRIS consortium (IST/UCLA) for access to the OSIRIS code. Special thanks for support go to J. Vieira. Furthermore, we like to thank DESY IT for their support concerning simulations and data storage at DESY. C. B. Schroeder acknowledges support from U.S. Department of Energy under Contract No. DE-AC02-05CH11231. NR 11 TC 1 Z9 1 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 588 EP 593 DI 10.1063/1.4773763 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700087 ER PT S AU Muggli, P Allen, B Fang, Y Yakimenko, V Babzien, M Kusche, K Fedurin, M Vieira, J Martins, J Silva, L AF Muggli, P. Allen, B. Fang, Y. Yakimenko, V. Babzien, M. Kusche, K. Fedurin, M. Vieira, J. Martins, J. Silva, L. BE Zgadzaj, R Gaul, E Downer, MC TI Three Regimes of Relativistic Beam - Plasma Interaction SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE plasma wakefield accelerator; self-modulation instability; current filamentation instability; resonant excitation; instability seeding ID ACCELERATION; WAKEFIELDS; ELECTRONS AB Three regimes of relativistic beam - plasma interaction can in principle be reached at the ATF depending on the relative transverse and longitudinal size of the electron bunch when compared to the cold plasma collisionless skin depth c/omega(pe): the plasma wakefield accelerator (PWFA), the self-modulation instability (SMI), and the current filamentation instability (CFI) regime. In addition, by choosing the bunch density, the linear, quasi-nonlinear and non linear regime of the PWFA can be reached. In the case of the two instabilities, the bunch density determines the growth rate and therefore the occurrence or not of the instability. We briefly describe these three regimes and outline results demonstrating that all these regime have or will be reached experimentally. We also outline planned and possible follow-on experiments. C1 [Muggli, P.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany. [Muggli, P.; Fang, Y.] Univ So Calif, Los Angeles, CA 90089 USA. [Fedurin, M.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Silva, L.] Univ Tecn Lisboa, Lab Associado Inst Super Tecn IST, GoLP Inst Plasmas Fusao Nucl, Lisbon, Portugal. RP Muggli, P (reprint author), Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany. RI Luis Martins, Joana/K-6610-2015 OI Vieira, Jorge/0000-0002-5515-3624; Luis Martins, Joana/0000-0003-2748-0377 FU NSF [0903822]; DoE [DEFG03-92ER40745] FX This work was supported by NSF grant 0903822 and DoE grant DEFG03-92ER40745. No experiments would be possible without the many expert contributions of the ATF technical personnel. Thank you. NR 31 TC 2 Z9 2 U1 0 U2 6 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 594 EP 599 DI 10.1063/1.4773764 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700088 ER PT S AU O'Shea, B Rosenzweig, J Barber, S Fukasawa, A Williams, O Muggli, P Yakimenko, V Kusche, K AF O'Shea, Brendan Rosenzweig, James Barber, Samuel Fukasawa, Atsushi Williams, Oliver Muggli, Patric Yakimenko, Vitaly Kusche, Karl BE Zgadzaj, R Gaul, E Downer, MC TI Transformer Ratio Improvement For Beam Based Plasma Accelerators SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE beam plasma interactions; plasma dynamics; advanced acceleration AB Increasing the transformer ratio of wakefield accelerating systems improves the viability of present novel accelerating schemes. The use of asymmetric bunches to improve the transformer ratio of beam based plasma systems has been proposed for some time[1, 2] but suffered from lack appropriate beam creation systems. Recently these impediments have been overcome [3, 4] and the ability now exists to create bunches with current profiles shaped to overcome the symmetric beam limit of R <= 2. We present here work towards experiments designed to measure the transformer ratio of such beams, including theoretical models and simulations using VORPAL (a 3D capable PIC code) [5]. Specifically we discuss projects to be carried out in the quasi-nonlinear regime [6] at the UCLA Neptune Laboratory and the Accelerator Test Facility at Brookhaven National C1 [O'Shea, Brendan; Rosenzweig, James; Barber, Samuel; Fukasawa, Atsushi; Williams, Oliver] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. [Muggli, Patric] Univ So Calif, Dept Elect Engn, Los Angeles, CA 90089 USA. [Muggli, Patric] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany. [Yakimenko, Vitaly; Kusche, Karl] Brookhaven Natl Lab, Accelerator Test Facil, Upton, NY 11973 USA. RP O'Shea, B (reprint author), Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. FU US DoE [DE-FG02-07ER46272, DE-FG03-92ER40693]; ONR [N00014-06-0925] FX This work is partially supported by US DoE Grants DE-FG02-07ER46272, DE-FG03-92ER40693 and ONR contract N00014-06-0925. NR 24 TC 0 Z9 0 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 606 EP 611 DI 10.1063/1.4773766 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700090 ER PT S AU Rosenzweig, JB Andonian, G Barber, S Ferrario, M Muggli, P O'Shea, B Sakai, Y Valloni, A Williams, O Xi, Y Yakimenko, V AF Rosenzweig, J. B. Andonian, G. Barber, S. Ferrario, M. Muggli, P. O'Shea, B. Sakai, Y. Valloni, A. Williams, O. Xi, Y. Yakimenko, V. BE Zgadzaj, R Gaul, E Downer, MC TI Plasma wakefields in the quasi-nonlinear regime: Experiments at ATF SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Plamsa wakefield acceleration; PWFA; linear; non linear; plasma ID WAKE FIELDS; ACCELERATION; ELECTRONS AB In this work we present details of planned experiments to investigate certain aspects of the quasi non linear regime (QNL) of plasma wakefield acceleration (PWFA). In the QNL regime it is, in principal, possible to combine the benefits of both nonlinear and linear PWFA. That is, beams of high quality can be maintained through acceleration due to the complete ejection of plasma electrons from beam occupied region, while large energy gains can be achieved through use of transformer ratio increasing schemes, such as ramped bunch trains. With the addition of an short focal length PMQ triplet capable of focusing beams to the few micron scale and the ability to generate tunable bunch trains, the Accelerator Test Facility (ATF) at Brookhaven National Lab offers the unique capabilities to probe these characteristics of the QNL regime. C1 [Rosenzweig, J. B.; Andonian, G.; Barber, S.; O'Shea, B.; Sakai, Y.; Valloni, A.; Williams, O.; Xi, Y.] Univ Calif Los Angeles, Dept Phys & Astron, 405 Hilgard Ave, Los Angeles, CA 90095 USA. [Ferrario, M.] Ist Nazl Fis Nucleare, Lab Nazionali Frascati, Accelerator Div, I-00044 Frascati, Italy. [Muggli, P.] Max Planck Inst Phys & Astrophys, Munich, Germany. [Yakimenko, V.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Rosenzweig, JB (reprint author), Univ Calif Los Angeles, Dept Phys & Astron, 405 Hilgard Ave, Los Angeles, CA 90095 USA. NR 15 TC 6 Z9 6 U1 1 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 612 EP 617 DI 10.1063/1.4773767 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700091 ER PT S AU Schroeder, CB Benedetti, C Esarey, E Gruner, FJ Leemans, WP AF Schroeder, C. B. Benedetti, C. Esarey, E. Gruener, F. J. Leemans, W. P. BE Zgadzaj, R Gaul, E Downer, MC TI Beam hosing instability in overdense plasma SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE plasma wakefield accelerator; proton beam driven plasma wave ID WAKEFIELD ACCELERATOR; ELECTRONS AB Transverse stability of the drive beam is critical to plasma wakefield accelerators. A long, relativistic particle beam propagating in an overdense plasma is subject to beam envelope modulation and hosing (centroid displacement) instabilities. Coupled equations for the beam centroid and envelope are derived. The growth rate for beam hosing is examined including return current effects (where the beam radius is of order the plasma skin depth) in the long-beam, strongly-coupled, overdense regime. C1 [Schroeder, C. B.; Benedetti, C.; Esarey, E.; Leemans, W. P.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Gruener, F. J.] Univ Hamburg, D-22761 Hamburg, Germany. RP Schroeder, CB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. OI Schroeder, Carl/0000-0002-9610-0166 FU U.S. Department of Energy [DE-AC02-05CH11231] FX The authors would like to acknowledge useful discussions with Alberto Martinez de la Ossa, Jens Osterhoff, and Frank Stephan. This work was supported by the Director, Office of Science, Office of High Energy Physics, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. NR 20 TC 0 Z9 0 U1 1 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 623 EP 628 DI 10.1063/1.4773769 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700093 ER PT S AU Simakov, EI Carlsten, BE Shchegolkov, DY AF Simakov, Evgenya I. Carlsten, Bruce E. Shchegolkov, Dmitry Yu. BE Zgadzaj, R Gaul, E Downer, MC TI Possibility for Ultra-bright Electron Beam Acceleration in Dielectric Wakefield Accelerators SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE dielectric wakefield accelerator; emittance exchanger; free electron laser ID WAKE-FIELD AB We describe a conceptual proposal to combine the Dielectric Wakefield Accelerator (DWA) with the Emittance Exchanger (EEX) to demonstrate a high-brightness DWA with a gradient of above 100 MV/m and less than 0.1% induced energy spread in the accelerated beam. We currently evaluate the DWA concept as a performance upgrade for the future LANL signature facility MaRIE with the goal of significantly reducing the electron beam energy spread. The pre-conceptual design for MaRIE is underway at LANL, with the design of the electron linear accelerator being one of the main research goals. Although generally the baseline design needs to be conservative and rely on existing technology, any future upgrade would immediately call for looking into the advanced accelerator concepts capable of boosting the electron beam energy up by a few GeV in a very short distance without degrading the beam's quality. Scoping studies have identified large induced energy spreads as the major cause of beam quality degradation in high-gradient advanced accelerators for free-electron lasers. We describe simulations demonstrating that trapezoidal bunch shapes can be used in a DWA to greatly reduce the induced beam energy spread, and, in doing so, also preserve the beam brightness at levels never previously achieved. This concept has the potential to advance DWA technology to a level that would make it suitable for the upgrades of the proposed Los Alamos MaRIE signature facility. C1 [Simakov, Evgenya I.; Carlsten, Bruce E.; Shchegolkov, Dmitry Yu.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Simakov, EI (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. OI Carlsten, Bruce/0000-0001-5619-907X; Shchegolkov, Dmitry/0000-0002-0721-3397; Simakov, Evgenya/0000-0002-7483-1152 NR 20 TC 4 Z9 4 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 634 EP 638 DI 10.1063/1.4773771 PG 5 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700095 ER PT S AU Thangaraj, JCT Park, CS Lewis, JD Spentzouris, P An, W Mori, W Joshi, C AF Thangaraj, J. C. T. Park, C. S. Lewis, J. D. Spentzouris, P. An, W. Mori, W. Joshi, C. BE Zgadzaj, R Gaul, E Downer, MC TI PROTOPLASMA - Proton-driven plasma-wakefield experiment at Fermilab: Stages and Approach SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE proton-driven accelerator; plasma wakefield; self-modulation instability; colliders ID ACCELERATOR AB Generation of TeV-scale electron beams using conventional RF technology appears expensive for building the next generation of colliders. Proton-driven plasma-wakefield acceleration of electrons promises an alternative route to generate TeV-scale electron beams using existing proton machines. PROTOPLASMA is the proposed R&D project at Fermilab that plans to use a proton beam driven plasma-wakefield to accelerate electrons. The project is planned in stages with the project's path guided by simulations. First, a 60-120 GeV proton beam will be injected into 1-2 meters of plasma to observe self-modulation instability in the proton beam. Next, an injected 5 MeV electron beam will be accelerated by the plasma. In this paper, we report on the basic project plan and outline our staged approach. We report on first simulation results that show self-modulation of a proton bunch and discuss beam optics requirements and other limits. C1 [Thangaraj, J. C. T.; Park, C. S.; Lewis, J. D.; Spentzouris, P.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. [An, W.; Mori, W.; Joshi, C.] Univ Calif Los Angeles, Los Angeles, CA USA. RP Thangaraj, JCT (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. NR 9 TC 1 Z9 1 U1 1 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 644 EP 649 DI 10.1063/1.4773773 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700097 ER PT S AU Albert, F Anderson, SG Ebbers, CA Gibson, DJ Hartemann, FV Marsh, RA Messerly, MJ Prantil, MA Wu, S Barty, CPJ AF Albert, F. Anderson, S. G. Ebbers, C. A. Gibson, D. J. Hartemann, F. V. Marsh, R. A. Messerly, M. J. Prantil, M. A. Wu, S. Barty, C. P. J. BE Zgadzaj, R Gaul, E Downer, MC TI Development of Compton gamma-ray sources at LLNL SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Radiation by moving charges; X- and gamma-ray sources; X-ray; gamma-ray; particle generation ID RESONANCE FLUORESCENCE AB Compact Compton scattering gamma-ray sources offer the potential of studying nuclear photonics with new tools. The optimization of such sources depends on the final application, but generally requires maximizing the spectral density (photons/eV) of the gamma-ray beam while simultaneously reducing the overall bandwidth on target to minimize noise. We have developed an advanced design for one such system, comprising the RF drive, photo injector, accelerator, and electron-generating and electron-scattering laser systems. This systems uses a 120 Hz, 250pC, 2 ps, 0.35 mm mrad electron beam with 250 MeV maximum energy in an X-band accelerator scattering off a 150 mJ, 20 ps, 532 nm laser to generate 5 x 10(10) photons/eV/s/Sr at 0.5 MeV with an overall bandwidth of less than 1%. The source will be able to produce photons up to energies of 2.5 MeV. We also discuss Compton scattering gamma-ray source predictions given by numerical codes. C1 [Albert, F.; Anderson, S. G.; Ebbers, C. A.; Gibson, D. J.; Hartemann, F. V.; Marsh, R. A.; Messerly, M. J.; Prantil, M. A.; Wu, S.; Barty, C. P. J.] Lawrence Livermore Natl Lab, NIF & Photon Sci, Livermore, CA 94550 USA. RP Albert, F (reprint author), Lawrence Livermore Natl Lab, NIF & Photon Sci, 7000 E Ave, Livermore, CA 94550 USA. RI Albert, Felicie/G-2645-2013 NR 16 TC 0 Z9 0 U1 0 U2 7 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 666 EP 671 DI 10.1063/1.4773777 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700101 ER PT S AU Ha, G Power, J Kim, SH Gai, W Kim, KJ Cho, MH Namkung, W AF Ha, G. Power, J. Kim, S. H. Gai, W. Kim, K. -J. Cho, M. H. Namkung, W. BE Zgadzaj, R Gaul, E Downer, MC TI Start-to-End Beam Dynamics Simulation of Double Triangular Current Profile Generation in Argonne Wakefield Accelerator SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE beam dynamics; phase space manipulation; emittance exchange; current profile shaping AB Double triangular current profile (DT) gives a high transformer ratio which is the determining factor of the performance of collinear wakefield accelerator. This current profile can be generated using the emittance exchange (EEX) beam line. Argonne Wakefield Accelerator (AWA) facility plans to generate DT using the EEX beam line. We conducted start-to-end simulation for the AWA beam line using PARMELA code. Also, we discuss requirements of beam parameters for the generation of DT. C1 [Ha, G.; Kim, K. -J.; Cho, M. H.] POSTECH, Pohang 790784, Gyeongbuk, South Korea. [Power, J.; Kim, S. H.; Gai, W.; Kim, K. -J.] Argonne Natl Lab, Argonne, IL 60439 USA. [Cho, M. H.; Namkung, W.] Pohang Accelerator Lab, Pohang 790784, South Korea. RP Ha, G (reprint author), POSTECH, Pohang 790784, Gyeongbuk, South Korea. FU POSTECH; Argonne National Laboratory; US DOE FX This work was supported by POSTECH and Argonne National Laboratory. Also, it is supported by the office of HEP, US DOE. NR 3 TC 1 Z9 1 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 693 EP 698 DI 10.1063/1.4773782 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700106 ER PT S AU Matlis, NH Geddes, CGR Plateau, GR Esarey, E Schroeder, C Bruhwiler, D Cormier-Michel, E Chen, M Yu, L Leemans, WP AF Matlis, N. H. Geddes, C. G. R. Plateau, G. R. Esarey, E. Schroeder, C. Bruhwiler, D. Cormier-Michel, E. Chen, M. Yu, L. Leemans, W. P. BE Zgadzaj, R Gaul, E Downer, MC TI Controlling Electron Injection in Laser Plasma Accelerators Using Multiple Pulses SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Colliding Pulse; Laser; Plasma; Accelerator; Wakefield AB Use of counter-propagating pulses to control electron injection in laser-plasma accelerators promises to be an important ingredient in the development of stable devices. We discuss the colliding pulse scheme and associated diagnostics. C1 [Matlis, N. H.; Geddes, C. G. R.; Plateau, G. R.; Esarey, E.; Schroeder, C.; Yu, L.; Leemans, W. P.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Bruhwiler, D.; Cormier-Michel, E.] Tech X Corp, Boulder, CO 80303 USA. [Chen, M.] Jiao Tong Univ, Shanghai 200240, Peoples R China. [Leemans, W. P.] Univ Calif, Berkeley, CA 94720 USA. RP Matlis, NH (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RI Chen, Min/A-9955-2010; OI Chen, Min/0000-0002-4290-9330; Schroeder, Carl/0000-0002-9610-0166 FU U.S. Department of Energy [DE-AC02-05CH11231] FX This work was supported by the Office of Science, Office of High Energy Physics, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. NR 5 TC 2 Z9 2 U1 1 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 717 EP 721 DI 10.1063/1.4773786 PG 5 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700110 ER PT S AU Nakamura, K Sokollik, T van Tilborg, J Gonsalves, AJ Shaw, B Shiraishi, S Mittal, R De Santis, S Byrd, JM Leemans, W AF Nakamura, K. Sokollik, T. van Tilborg, J. Gonsalves, A. J. Shaw, B. Shiraishi, S. Mittal, R. De Santis, S. Byrd, J. M. Leemans, W. BE Zgadzaj, R Gaul, E Downer, MC TI Beam Transport and Monitoring for Laser Plasma Accelerators SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Laser plasma acceleration; electron beam transport; permanent-magnet quadrupole; beam position monitor ID WAKEFIELD ACCELERATOR; ELECTRON-BEAMS; DRIVEN AB The controlled transport and imaging of relativistic electron beams from laser plasma accelerators (LPAs) are critical for their diagnostics and applications. Here we present the design and progress in the implementation of the transport and monitoring system for an undulator based electron beam diagnostic. Miniature permanent-magnet quadrupoles (PMQs) are employed to realize controlled transport of the LPA electron beams, and cavity based electron beam position monitors for non-invasive beam position detection. Also presented is PMQ calibration by using LPA electron beams with broadband energy spectrum. The results show promising performance for both transporting and monitoring. With the proper transport system, XUV-photon spectra from THUNDER will provide the momentum distribution of the electron beam with the resolution above what can be achieved by the magnetic spectrometer currently used in the LOASIS facility. C1 [Nakamura, K.; Sokollik, T.; van Tilborg, J.; Gonsalves, A. J.; Shaw, B.; Shiraishi, S.; Mittal, R.; De Santis, S.; Byrd, J. M.; Leemans, W.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Nakamura, K (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RI Sokollik, Thomas/P-2584-2015 NR 32 TC 1 Z9 1 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 728 EP 733 DI 10.1063/1.4773788 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700112 ER PT S AU Piot, P Brau, CA Gabella, WE Choi, BK Jarvis, JD Lewellen, JW Mendenhall, MH Mihalcea, D AF Piot, P. Brau, C. A. Gabella, W. E. Choi, B. K. Jarvis, J. D. Lewellen, J. W. Mendenhall, M. H. Mihalcea, D. BE Zgadzaj, R Gaul, E Downer, MC TI R&D toward a Compact High-Brilliance X-ray Source based on Channeling Radiation SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE beam dynamics; electron beams; X-rays ID CHARGED-PARTICLES; NANOTUBES; EMISSION; CRYSTAL; DIAMOND AB X-rays have been valuable to a large number of fields including Science, Medicine, and Security. Yet, the availability of a compact high-spectral brilliance X-ray sources is limited. A technique to produce X-rays with spectral brilliance B similar to 10(12) photons.(mm-mrd)(-2).(0.1% BW)(-1).s(-1) is discussed. The method is based on the generation and acceleration of a low-emittance field-emitted electron bunches. The bunches are then focused on a diamond crystal thereby producing channeling radiation. In this paper, after presenting the overarching concept, we discuss the generation, acceleration and transport of the low-emittance bunches with parameters consistent with the production of high-brilliance X-rays through channeling radiation. We especially consider the example of the Advanced Superconducting Test Accelerator (ASTA) currently in construction at Fermilab where a proof-of-principle experiment is in preparation. C1 [Piot, P.; Mihalcea, D.] Northern Illinois Univ, Northern Illinois Ctr Accelerator & Detector Dev, De Kalb, IL 60115 USA. [Piot, P.] Fermilab Natl Accelerator Lab, Accelerator Phys Ctr, Batavia, IL 60510 USA. [Brau, C. A.; Gabella, W. E.; Jarvis, J. D.; Mendenhall, M. H.] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. [Choi, B. K.] Vanderbilt Univ, Dept Elect Engn & Comp Sci, Nashville, TN 37235 USA. [Lewellen, J. W.] Naval Postgraduate Sch, Phys Dept Combat Syst, Monterey, CA 93943 USA. RP Piot, P (reprint author), Northern Illinois Univ, Northern Illinois Ctr Accelerator & Detector Dev, De Kalb, IL 60115 USA. OI Choi, Bo K./0000-0002-4984-5958 FU DARPA with Vanderbilt University [AXIS N66001-11-1-4196]; DARPA with Northern Illinois University [AXIS N66001-11-1-4196]; LLC with U.S. Department of Energy [DE-AC02-07CH11359] FX This work was supported by the DARPA Axis program under contract AXIS N66001-11-1-4196 with Vanderbilt University and Northern Illinois University. The work of P.P. is partially supported by the Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy. We are thankful to R. A. Carrigan, Jr. for useful discussions on channeling radiation and to M. Church and V. Shiltsev for their support. NR 32 TC 2 Z9 2 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 734 EP 739 DI 10.1063/1.4773789 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700113 ER PT S AU Sakai, Y Xiao, L Barber, S O'Shea, FH Williams, O Rosenzweig, JB Pogorelsky, I Korostyshevsky, A Malone, B Kusche, K Montemagno, M Polyanskiy, MN Babzien, M Fedurin, M Yakimenko, V AF Sakai, Y. Xiao, L. Barber, S. O'Shea, F. H. Williams, O. Rosenzweig, J. B. Pogorelsky, I. Korostyshevsky, A. Malone, B. Kusche, K. Montemagno, M. Polyanskiy, M. N. Babzien, M. Fedurin, M. Yakimenko, V. BE Zgadzaj, R Gaul, E Downer, MC TI Angular Spectrum Characteristics of Relativistic Inverse Compton Harmonic X-rays SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Inverse Compton scattering; X-to-gamma-ray laser; Strong field laser; Infrared laser ID THOMSON SCATTERING; ELECTRON; BEAMS AB The X-ray spectrum emitted during relativistic non-linear inverse Compton scattering is angularly resolved, and energy analyzed through the use of K-edge and attenuation filters. A 0.5 nC electron beam of 65 MeV energy was employed, colliding with a highly intense CO2 laser of normalized vector potential a(L)similar to 0.5. In this experiment, 2nd harmonic radiation was clearly observed. In addition, evidence for the 3rd harmonic component of the radiation, having radiation angle of < 1/gamma has been found. This measurement represents a significant step forward in experimental understanding the electrodynamics of ICS in the nonlinear regime. C1 [Sakai, Y.; Xiao, L.; Barber, S.; O'Shea, F. H.; Williams, O.; Rosenzweig, J. B.] Univ Calif Los Angeles, Dept Phys & Astron, 405 Hilgard Ave, Los Angeles, CA 90095 USA. [Pogorelsky, I.; Korostyshevsky, A.; Malone, B.; Kusche, K.; Montemagno, M.; Polyanskiy, M. N.; Babzien, M.; Fedurin, M.; Yakimenko, V.] Brookhaven Natl Lab, Accelerator Test Facil, Upton, NY 11973 USA. RP Sakai, Y (reprint author), Univ Calif Los Angeles, Dept Phys & Astron, 405 Hilgard Ave, Los Angeles, CA 90095 USA. RI Polyanskiy, Mikhail/E-8406-2010 FU U. S. Department of Energy [DE- FG02- 07ER46272, DE- FG03- 92ER40693]; Office of Naval Research [ONR N00014- 06- 1- 0925]; Defense Threat Reduction Agency [HDTRA1- 10- 1- 0073] FX This work was supported by the U. S. Department of Energy under Contracts No. DE- FG02- 07ER46272 and No. DE- FG03- 92ER40693, the Office of Naval Research under Contract No. ONR N00014- 06- 1- 0925, and the Defense Threat Reduction Agency Contract No. HDTRA1- 10- 1- 0073. The authors would like to thank all of the members and collaborators in BNL ATF and UCLA PBPL. In addition, authors would like to acknowledge for helpful advices and contributions from Dr. T. Kumita in Tokyo Metropolitan Univ., Dr. Y. Kamiya in Tokyo Univ, Dr. D. Cline, and Dr. S. Tochitsky in UCLA. NR 22 TC 2 Z9 2 U1 0 U2 5 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 746 EP 751 DI 10.1063/1.4773791 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700115 ER PT S AU Shumail, M Bowden, G Chang, C Neilson, J Tantawi, S AF Shumail, M. Bowden, G. Chang, C. Neilson, J. Tantawi, S. BE Zgadzaj, R Gaul, E Downer, MC TI Beam Dynamics Studies of a Helical X-Band RF Undulator SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE RF Undulator; Electron Beam Dynamics; Symplectic Integration; Field Integrals; Electron Beam Drift AB We present beam dynamics studies of a proposed circularly polarized RF undulator cavity to be operated at 50 MW to yield the undulator strength parameter K = 0.7. A symplectic integration scheme is used for numerical studies. The expressions for field integrals of the RF undulator are also developed. Simulation results for the electron trajectories, showing off-axis drift and bunch defocusing, for 60 and 120 MeV beam energies are presented. C1 [Shumail, M.; Bowden, G.; Chang, C.; Neilson, J.; Tantawi, S.] SLAC, Menlo Pk, CA 94025 USA. RP Shumail, M (reprint author), SLAC, Menlo Pk, CA 94025 USA. NR 5 TC 3 Z9 3 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 752 EP 756 DI 10.1063/1.4773792 PG 5 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700116 ER PT S AU Thangaraj, JCT Piot, P AF Thangaraj, J. C. T. Piot, P. BE Zgadzaj, R Gaul, E Downer, MC TI A high-resolution multi-slit phase space measurement technique for low-emittance beams SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE multi-slit; emittance; high-resolution; emittance exchange; low-emittance AB Precise measurement of transverse phase space of a high-brightness electron beam is of fundamental importance in modern accelerators and free-electron lasers. Often, the transverse phase space of a high-brightness, space-charge-dominated electron beam is measured using a multi-slit method. In this method, a transverse mask (slit/pepperpot) samples the beaminto a set of beamlets, which are then analyzed on to a screen downstream. The resolution in this method is limited by the type of screen used which is typically around 20 mu m for a high-sensitivity Yttrium Aluminum Garnet screen. Accurate measurement of sub-micron transverse emittance using this method would require a long drift space between the multi-slit mask and observation screen. In this paper, we explore a variation of the technique that incorporates quadrupole magnets between the multi-slit mask and the screen. It is shown that this arrangement can improve the resolution of the transverse-phase-space measurement within a short footprint. C1 [Thangaraj, J. C. T.; Piot, P.] Fermilab Natl Accelerator Lab, Accelerator Phys Ctr, Batavia, IL 60510 USA. RP Thangaraj, JCT (reprint author), Fermilab Natl Accelerator Lab, Accelerator Phys Ctr, POB 500, Batavia, IL 60510 USA. NR 14 TC 0 Z9 0 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 757 EP 761 DI 10.1063/1.4773793 PG 5 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700117 ER PT S AU van Tilborg, J Bakker, D Matlis, NH Leemans, WP AF van Tilborg, J. Bakker, D. Matlis, N. H. Leemans, W. P. BE Zgadzaj, R Gaul, E Downer, MC TI Broad bandwidth THz pulse and e-beam characterization SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Electro-optic sampling; electron beam diagnostic; spectral up-conversion; sideband generation ID SHOT SPATIOTEMPORAL MEASUREMENTS AB Electro-optic sampling (EOS) is widely used as a technique to measure THz-domain electric field pulses such as the self-fields of femtosecond electron beams. We present an EOS-based approach for single-shot spectral measurement that excels in simplicity (compatible with fiber integration) and bandwidth coverage (overcomes the laser bandwidth limitation), allowing few-fs electron beams or single-cycle THz pulses to be characterized with conventional picosecond probes. Experiments are conducted with a 0.11-THz-bandwidth optical probe and a broadband source (0-8 THz detection bandwidth) rich in spectral features. We observe clear optical sidebands for various electro-optic crystals. Sharp spectral features in the THz source spectrum are resolved. We also provide an outlook towards minimizing the crystal limitations and extending the detection bandwidth to 10's of THz. C1 [van Tilborg, J.; Bakker, D.; Matlis, N. H.; Leemans, W. P.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP van Tilborg, J (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 15 TC 0 Z9 0 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 768 EP 773 DI 10.1063/1.4773795 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700119 ER PT S AU van Tilborg, J Lin, C Nakamura, K Gonsalves, AJ Matlis, NH Sokollik, T Shiraishi, S Osterhoff, J Benedetti, C Schroeder, CB Toth, C Esarey, E Leemans, WP AF van Tilborg, J. Lin, C. Nakamura, K. Gonsalves, A. J. Matlis, N. H. Sokollik, T. Shiraishi, S. Osterhoff, J. Benedetti, C. Schroeder, C. B. Toth, Cs. Esarey, E. Leemans, W. P. BE Zgadzaj, R Gaul, E Downer, MC TI Long-Range Persistence of Femtosecond Modulations on Laser-Plasma-Accelerated Electron Beams SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Electro-optic sampling; electron beam diagnostic; spectral up-conversion; sideband generation AB Laser plasma accelerators have produced femtosecond electron bunches with a relative energy spread ranging from 100% to a few percent. Simulations indicate that the measured energy spread can be dominated by a correlated spread, with the slice spread significantly lower. Measurements of coherent optical transition radiation are presented for broad-energy-spread beams with laser-induced density and momentum modulations. The long-range ( meter-scale) observation of coherent optical transition radiation indicates that the slice energy spread is below the percent level to preserve the modulations. C1 [van Tilborg, J.; Nakamura, K.; Gonsalves, A. J.; Matlis, N. H.; Sokollik, T.; Shiraishi, S.; Osterhoff, J.; Benedetti, C.; Schroeder, C. B.; Toth, Cs.; Esarey, E.; Leemans, W. P.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. [Lin, C.] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China. RP van Tilborg, J (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. RI Sokollik, Thomas/P-2584-2015; OI Schroeder, Carl/0000-0002-9610-0166 FU U. S. Department of Energy [DE- AC0205CH11231]; National Science Foundation [PHY- 0935197, PHY- 0917687]; China Scholarship Council FX This work was supported by the U. S. Department of Energy under Contract No. DE- AC0205CH11231, and by the National Science Foundation under Grants PHY- 0935197 and PHY- 0917687. This work is also supported by the China Scholarship Council. NR 18 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 774 EP 779 DI 10.1063/1.4773796 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700120 ER PT S AU Velazquez, D Wisniewski, EE Yusof, Z Harkay, K Spentzouris, L Terry, J AF Velazquez, D. Wisniewski, E. E. Yusof, Z. Harkay, K. Spentzouris, L. Terry, J. BE Zgadzaj, R Gaul, E Downer, MC TI Kelvin Probe Studies of Cesium Telluride Photocathode for the AWA Photoinjector SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus ID WORK-FUNCTIONS; SPECTROSCOPY AB Cesium telluride is an important photocathode as an electron source for particle accelerators. It has a relatively high quantum efficiency (> 1%), is robust in a photoinjector, and long lifetime. This photocathode is fabricated in-house for a new Argonne Wakefield Accelerator (AWA) beamline to produce high charge per bunch (similar to 50 nC) in a long bunch train. We present some results from a study of the work function of cesium telluride photocathode using the Kelvin Probe technique. The study includes an investigation of the correlation between the quantum efficiency and the work function, the effect of photocathode aging, the effect of UV light exposure on the work function, and the evolution of the work function during and after photocathode rejuvenation via heating. C1 [Velazquez, D.; Wisniewski, E. E.; Spentzouris, L.; Terry, J.] IIT, Dept Phys, Chicago, IL 60616 USA. [Velazquez, D.; Wisniewski, E. E.; Yusof, Z.] Argonne Natl Lab, High Energy Phys Div, Lemont, IL 60439 USA. [Harkay, K.] Argonne Natl Lab, Accelerator Sci Div, Lemont, IL 60439 USA. RP Velazquez, D (reprint author), IIT, Dept Phys, Chicago, IL 60616 USA. FU U. S. Dept of Energy Office of Science [DE- AC02- 06CH11357]; National Science Foundation [0969989] FX We thank Richard Rosenberg, Wei Gai, and acknowledge valuable discussion with Karoly Nemeth. This work was funded by the U. S. Dept of Energy Office of Science under contract number DE- AC02- 06CH11357 and the National Science Foundation under grant number 0969989. NR 14 TC 1 Z9 1 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 780 EP 784 DI 10.1063/1.4773797 PG 5 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700121 ER PT S AU Bulanov, SS Schroeder, CB Esarey, E Leemans, WP AF Bulanov, S. S. Schroeder, C. B. Esarey, E. Leemans, W. P. BE Zgadzaj, R Gaul, E Downer, MC TI Optimized laser pulse profile for efficient radiation pressure acceleration of ions SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE laser ion acceleration; radiation pressure acceleration ID RELATIVISTIC IONS; COLLIMATED BEAMS; FAST IGNITION; GENERATION; PLASMAS; FOIL AB The radiation pressure acceleration regime of laser ion acceleration requires high intensity laser pulses to function efficiently. Moreover the foil should be opaque for incident radiation during the interaction to ensure maximum momentum transfer from the pulse to the foil, which requires proper matching of the target to the laser pulse. However, in the ultrarelativistic regime, this leads to large acceleration distances, over which the high laser intensity for a Gaussian laser pulse must be maintained. It is shown that proper tailoring of the laser pulse profile can significantly reduce the acceleration distance, leading to a compact laser ion accelerator, requiring less energy to operate. C1 [Bulanov, S. S.; Leemans, W. P.] Univ Calif Berkeley, Berkeley, CA 94720 USA. [Schroeder, C. B.; Esarey, E.; Leemans, W. P.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Bulanov, SS (reprint author), Univ Calif Berkeley, Berkeley, CA 94720 USA. OI Schroeder, Carl/0000-0002-9610-0166 FU NSF [PHY- 0935197]; Office of Science of the US DOE [DE- AC02- 05CH11231, DE- FG02- 12ER41798] FX We appreciate support from the NSF under Grant No. PHY- 0935197 and the Office of Science of the US DOE under Contract No. DE- AC02- 05CH11231 and No. DE- FG02- 12ER41798. NR 55 TC 0 Z9 0 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 785 EP 790 DI 10.1063/1.4773798 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700122 ER PT S AU Pogorelsky, IV Dover, NP Babzien, M Bell, AR Dangor, AE Horbury, T Palmer, CAJ Polyanskiy, M Schreiber, J Schwartz, S Shkolnikov, P Yakimenko, V Najmudin, Z AF Pogorelsky, I. V. Dover, N. P. Babzien, M. Bell, A. R. Dangor, A. E. Horbury, T. Palmer, C. A. J. Polyanskiy, M. Schreiber, J. Schwartz, S. Shkolnikov, P. Yakimenko, V. Najmudin, Z. BE Zgadzaj, R Gaul, E Downer, MC TI Ion Acceleration by Laser Hole-Boring into Plasmas SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE CO2 lasers; ion acceleration; plasma; shock wave ID COLLISIONLESS SHOCKS; ABSORPTION AB By experiment and simulations, we study the interaction of an intense CO2 laser pulse with slightly over-critical plasmas of fully ionized helium gas. Transverse optical probing is used to show a recession of the front plasma surface with an initial velocity >10(6) m/s driven by hole-boring by the laser pulse and the resulting radiation pressure driven electrostatic shocks. The collisionless shock propagates through the plasma, dissipates into an ion-acoustic solitary wave, and eventually becomes collisional as it slows further. These observations are supported by PIC simulations which prove the conclusion that monoenergetic protons observed in our earlier reported experiment with a hydrogen jet result from ion trapping and reflection from a shock wave driven through the plasma. C1 [Pogorelsky, I. V.; Babzien, M.; Polyanskiy, M.; Yakimenko, V.] Brookhaven Natl Lab, Accelerator Test Facil, Upton, NY 11973 USA. [Dover, N. P.; Dangor, A. E.; Horbury, T.; Palmer, C. A. J.; Schreiber, J.; Schwartz, S.; Najmudin, Z.] Imperial Coll London, Blackett Lab, London, England. [Bell, A. R.] Univ Oxford, Clarendon Lab, Oxford OX1 3PU, England. [Shkolnikov, P.] SUNY Stony Brook, Stony Brook, NY 11794 USA. RP Pogorelsky, IV (reprint author), Brookhaven Natl Lab, Accelerator Test Facil, Upton, NY 11973 USA. RI Polyanskiy, Mikhail/E-8406-2010 FU US DOE with RCUK Libra Basic Tech [DE- AC02- 98CH10886]; US DOE [DE- FG02- 07ER41488] FX The work was supported by the US DOE contract DE- AC02- 98CH10886 with part funded by RCUK Libra Basic Tech and US DOE DE- FG02- 07ER41488 grants. We thank the Osiris consortium ( UCLA/ IST) for use of Osiris and K. Kusche and the ATF technical staff for experimental assistance. NR 13 TC 3 Z9 3 U1 0 U2 9 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 814 EP 819 DI 10.1063/1.4773803 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700127 ER PT S AU Bulanov, SS Chen, M Schroeder, CB Esarey, E Leemans, WP Bulanov, SV Esirkepov, TZ Kando, M Koga, JK Zhidkov, AG Chen, P Mur, VD Narozhny, NB Popov, VS Thomas, AGR Korn, G AF Bulanov, S. S. Chen, M. Schroeder, C. B. Esarey, E. Leemans, W. P. Bulanov, S. V. Esirkepov, T. Zh. Kando, M. Koga, J. K. Zhidkov, A. G. Chen, P. Mur, V. D. Narozhny, N. B. Popov, V. S. Thomas, A. G. R. Korn, G. BE Zgadzaj, R Gaul, E Downer, MC TI On the design of experiments to study extreme field limits SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Radiation damping; Quantum Electrodynamics; Electron-positron avalanches ID PLANE ELECTROMAGNETIC WAVE; POSITRON PAIR PRODUCTION; X-RAY LASERS; ELECTRIC-FIELD; SCHWINGER MECHANISM; QUANTUM PROCESSES; CONSTANT FIELD; VACUUM; LIGHT; BEAMS AB We propose experiments on the collision of high intensity electromagnetic pulses with electron bunches and on the collision of multiple electromagnetic pulses for studying extreme field limits in the nonlinear interaction of electromagnetic waves. The effects of nonlinear QED will be revealed in these laser plasma experiments. C1 [Bulanov, S. S.; Leemans, W. P.] Univ Calif Berkeley, Berkeley, CA 94720 USA. [Chen, M.; Schroeder, C. B.; Esarey, E.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Bulanov, S. V.; Esirkepov, T. Zh.; Kando, M.; Koga, J. K.] Kansai Photon Sci Inst, JAEA, Kizugawa, Kyoto 6190215, Japan. [Zhidkov, A. G.] Osaka Univ, Osaka 5650871, Japan. [Chen, P.] Natl Taiwan Univ, Leung Ctr Cosmol & Particle Astrophys, Taipei 10617, Taiwan. [Mur, V. D.; Narozhny, N. B.] Moscow Engn Phys Inst State Univ, Moscow 115409, Russia. [Popov, V. S.] Inst Theoret & Expt Phys, Moscow 117218, Russia. [Thomas, A. G. R.] Univ Michigan, Ann Arbor, MI 48103 USA. [Korn, G.] Max Planck Inst Quantum Opt, D-85748 Garching, Germany. [Korn, G.] Acad Sci Czech Republic, Inst Phys, ELI Beamline Facil, Prague 18221, Czech Republic. RP Bulanov, SS (reprint author), Univ Calif Berkeley, Berkeley, CA 94720 USA. RI Narozhny OR Narozhnyi, Nikolay/O-2851-2015; OI Narozhny OR Narozhnyi, Nikolay/0000-0002-2277-7430; Schroeder, Carl/0000-0002-9610-0166; Thomas, Alexander/0000-0003-3206-8512 FU NSF [PHY- 0935197]; Office of Science of the US DOE [DE- AC02- 05CH11231] FX We appreciate support from the NSF under Grant No. PHY- 0935197 and the Office of Science of the US DOE under Contract No. DE- AC02- 05CH11231. NR 62 TC 5 Z9 5 U1 0 U2 4 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 825 EP 830 DI 10.1063/1.4773805 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700129 ER PT S AU Fernow, RC Palmer, RB AF Fernow, R. C. Palmer, R. B. BE Zgadzaj, R Gaul, E Downer, MC TI Charge Recombination in the Muon Collider Cooling Channel SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE muon collider; cooling channel; bent solenoid AB The final stage of the ionization cooling channel for the muon collider must transversely recombine the positively and negatively charged bunches into a single beam before the muons can be accelerated. It is particularly important to minimize any emittance growth in this system since no further cooling takes place before the bunches are collided. We have found that emittance growth could be minimized by using symmetric pairs of bent solenoids and careful matching. We show that a practical design can be found that has transmission similar to 99%, emittance growth less than 0.1%, and minimal dispersion in the recombined bunches. C1 [Fernow, R. C.; Palmer, R. B.] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Fernow, RC (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. NR 6 TC 0 Z9 0 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 831 EP 836 DI 10.1063/1.4773806 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700130 ER PT S AU Li, ZH Ge, LX Adolphsen, C Li, DR Bowring, D AF Li, Zenghai Ge, Lixin Adolphsen, Chris Li, Derun Bowring, Daniel BE Zgadzaj, R Gaul, E Downer, MC TI RF Optimization and Analysis of the 805-MHz Cavity for the MuCool Program Using ACE3P SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Muon collider; ACE3P code suite; multipacting; dark current; rf breakdown AB An 805 MHz pillbox cavity tested at Fermilab's MTA facility showed significant degradation in gradient when operated in a several Tesla solenoidal magnetic field. We have used the advanced ACE3P simulation codes developed at SLAC to study the cavity dark current and multipacting characteristics to gain more insight into the gradient limitations. We also checked whether there is an optimal cavity length that minimizes the dark current impact energy. Finally, we have improved on the cavity design, significantly lowering the fields outside the beam area. These and other results are presented in this paper. C1 [Li, Zenghai; Ge, Lixin; Adolphsen, Chris] SLAC Natl Accelerator Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. [Li, Derun; Bowring, Daniel] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Li, ZH (reprint author), SLAC Natl Accelerator Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 837 EP 842 DI 10.1063/1.4773807 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700131 ER PT S AU Morozov, VS Derbenev, YS Afanasev, A Johnson, RP Erdelyi, B Maloney, JA AF Morozov, V. S. Derbenev, Ya. S. Afanasev, A. Johnson, R. P. Erdelyi, B. Maloney, J. A. BE Zgadzaj, R Gaul, E Downer, MC TI Parametric-Resonance Ionization Cooling of Muon Beams SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE parametric; resonance; ionization; cooling AB Parametric-resonance Ionization Cooling (PIC) is proposed as the final 6D cooling stage of a high-luminosity muon collider. Combining muon ionization cooling with parametric resonant dynamics should allow an order of magnitude smaller final equilibrium transverse beam emittances than conventional ionization cooling alone. In this scheme, a half-integer parametric resonance is induced in a cooling channel causing the beam to be naturally focused with the period of the channel's free oscillations. Thin absorbers placed at the focal points then cool the beam's angular divergence through the usual ionization cooling mechanism where each absorber is followed by RF cavities. A special continuous-field twin-helix magnetic channel with correlated behavior of the horizontal and vertical betatron motions and dispersion was developed for PIC. We present the results of modeling PIC in such a channel using GEANT4/G4beamline. We discuss the challenge of precise beam aberration control from one absorber to another over a wide angular spread. C1 [Morozov, V. S.; Derbenev, Ya. S.] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. [Afanasev, A.; Johnson, R. P.] Muons Inc, Batavia, IL 60510 USA. [Afanasev, A.] George Washington Univ, Washington, DC USA. [Erdelyi, B.; Maloney, J. A.] Northern Illinois Univ, De Kalb, IL 60115 USA. RP Morozov, VS (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. OI Afanasev, Andrei/0000-0003-0679-3307 FU U. S. DOE OHEP STTR [DE- SC0005589]; Jefferson Science Associates; LLC under U. S. DOE [DE- AC05- 06OR23177] FX This work was supported in part by U. S. DOE OHEP STTR Grant DE- SC0005589. This manuscript has been authored by Jefferson Science Associates, LLC under U. S. DOE Contract No. DE- AC05- 06OR23177. The U. S. Government retains a non- exclusive, paid- up, irrevocable, world- wide license to publish or reproduce this manuscript for U. S. Government purposes. NR 14 TC 0 Z9 0 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 843 EP 848 DI 10.1063/1.4773808 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700132 ER PT S AU Neuffer, D AF Neuffer, David BE Zgadzaj, R Gaul, E Downer, MC TI The First Muon Collider-125 GeV Higgs Factory? SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Higgs; muons; colliders AB Because muons connect directly to a standard-model Higgs particle in s-channel production, a muon collider would be an ideal device for precision measurement of the mass and width of a Higgs-like particle, and for further exploration of its production and decay properties. The LHC has seen evidence for a 125 GeV Higgs particle, and a muon collider at that energy could be constructed. Parameters of a high-precision muon collider are presented and the necessary components and performance are described. Extension to a higher-energy higher-luminosity device is also discussed. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Neuffer, D (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 11 TC 1 Z9 1 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 849 EP 853 DI 10.1063/1.4773809 PG 5 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700133 ER PT S AU Stratakis, D Alekou, A Neuffer, D Pasternak, J Rogers, CT AF Stratakis, Diktys Alekou, Androula Neuffer, David Pasternak, Jaroslaw Rogers, Chris T. BE Zgadzaj, R Gaul, E Downer, MC TI Numerical Study of a Bucked-Coil System for Muon Transport and Cooling SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE muon accelerators; beam transport; Neutrino Factory; ionization cooling AB A Neutrino Factory, which can deliver an intense flux of similar to 10(21) neutrinos per year from a multi-GeV stored muon-beam is seemingly the ideal tool for studying neutrino oscillations and CP-violations for leptons. The front-end of this facility plays a critical role in determining the number of muons that can be accepted by the downstream accelerators. Delivering peak performance requires transporting the muon beams through long sections of a beam channel containing high-gradient rf cavities and strong focusing solenoids. Here, we propose a novel scheme to improve the performance of the cavities, thereby increasing the number of muons within the acceptance of the accelerator chain. The key element of our new scheme is to apply a set of bucked coils along the lattice, thus forcing the external magnetic field to drop substantially within the cavity. We incorporate this idea into a new lattice design for a Neutrino Factory, and detail its performance numerically. C1 [Stratakis, Diktys] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. [Alekou, Androula; Pasternak, Jaroslaw] Imperial Coll London, Blackett Lab, London SW7 2BW, England. [Neuffer, David] Fermi Natl Acceleartor Lab, Batavia, IL 60510 USA. [Pasternak, Jaroslaw; Rogers, Chris T.] Rutherford Appleton Lab, Chilton, England. RP Stratakis, D (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. NR 12 TC 0 Z9 0 U1 1 U2 3 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 854 EP 859 DI 10.1063/1.4773810 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700134 ER PT S AU Polyanskiy, M Pogorelsky, I Babzien, M Yakimenko, V AF Polyanskiy, Mikhail Pogorelsky, Igor Babzien, Marcus Yakimenko, Vitaly BE Zgadzaj, R Gaul, E Downer, MC TI Next-generation Ultrafast CO2 Lasers for Strong-Field Science SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Terawatt CO2 laser; ultrashort mid-IR pulses ID AMPLIFICATION AB Strong-field research will benefit greatly from developing next-generation ultra-fast CO2 lasers based on all-solid-state femtosecond seed-pulse generation, chirped-pulse amplification, pulse compression via self-phase modulation, and optical pumping. We review progress in elaborating CO2 lasers aimed to meet the requirements of ion acceleration for radiation cancer therapy. C1 [Polyanskiy, Mikhail; Pogorelsky, Igor; Babzien, Marcus; Yakimenko, Vitaly] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Polyanskiy, M (reprint author), Brookhaven Natl Lab, Bldg 820M, Upton, NY 11973 USA. NR 5 TC 0 Z9 0 U1 1 U2 3 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 879 EP 881 DI 10.1063/1.4773815 PG 3 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700139 ER PT S AU Schroeder, CB Esarey, E Leemans, WP AF Schroeder, C. B. Esarey, E. Leemans, W. P. BE Zgadzaj, R Gaul, E Downer, MC TI Operational plasma density and laser parameters for future colliders based on laser-plasma accelerators SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE laser plasma electron acceleration; lepton collider ID ELECTRON-ACCELERATORS; BEAMS AB The operational plasma density and laser parameters for future colliders based on laser-plasma accelerators are discussed. Beamstrahlung limits the charge per bunch at low plasma densities. Reduced laser intensity is examined to improve accelerator efficiency in the beamstrahlung-limited regime. C1 [Schroeder, C. B.; Esarey, E.; Leemans, W. P.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Schroeder, CB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. OI Schroeder, Carl/0000-0002-9610-0166 NR 20 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 887 EP 892 DI 10.1063/1.4773817 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700141 ER PT S AU Xu, G Jovanovic, I Arab, E Hoang, P Musumeci, P O'Shea, B Rosenzweig, J Murokh, A Ovedenko, A Tikhoplav, R Pogorelsky, I AF Xu, G. Jovanovic, I. Arab, E. Hoang, P. Musumeci, P. O'Shea, B. Rosenzweig, J. Murokh, A. Ovedenko, A. Tikhoplav, R. Pogorelsky, I. BE Zgadzaj, R Gaul, E Downer, MC TI A 5 mu m Wavelength Laser for Dielectric Laser Acceleration SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE Mid-IR source; optical parametric amplification; optical parametric generation; BBO; ZnGeP2 ID FREQUENCY COMB; SPECTROSCOPY; ZNGEP2 AB A high-energy 5 mu m laser source which will be used to pump a dielectric photonic structure for GV-per-meter electron acceleration has been designed and modeled. The source utilizes two-step ultrafast optical parametric amplification and can be pumped by a Ti:sapphire laser. The experimental implementation and system integration are in progress. We describe 5-mu m seed pulse generation using optical parametric generation in AgGaS2 and ZnGeP2 crystals and the commissioning of a 2-mu m pump source, including supercontinuum generation and the preliminary results on the amplification of the signal beam at 1.3 mu m. C1 [Xu, G.; Jovanovic, I.] Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA. [Arab, E.; Hoang, P.; Musumeci, P.; O'Shea, B.; Rosenzweig, J.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. [Murokh, A.; Ovedenko, A.; Tikhoplav, R.] Radiabeam Technol, Santa Monica, CA 90404 USA. [Pogorelsky, I.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Xu, G (reprint author), Penn State Univ, Dept Mech & Nucl Engn, University Pk, PA 16802 USA. FU DARPA [N66001-11-1-4197] FX We gratefully acknowledge finical support from DARPA under Contract N66001-11-1-4197. NR 11 TC 2 Z9 2 U1 0 U2 7 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 893 EP 898 DI 10.1063/1.4773818 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700142 ER PT S AU Chen, M Cormier-Michel, E Geddes, CGR Bruhwiler, DL Yu, LL Esarey, E Schroeder, CB Leemans, WP AF Chen, M. Cormier-Michel, E. Geddes, C. G. R. Bruhwiler, David L. Yu, L. L. Esarey, E. Schroeder, C. B. Leemans, W. P. BE Zgadzaj, R Gaul, E Downer, MC TI Numerical simulation of laser tunneling ionization in explicit particle-in-cell codes SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE laser wakefield; injection; particle-in-cell simulation; ionization ID TERAHERTZ-EMISSION; PLASMA-WAVES; PULSES AB Methods for the calculation of laser tunneling ionization in explicit particle-in-cell codes used for modeling laser-plasma interactions are revisited. Improved accuracy is obtained by using the direct current form for the ionization rate. The effects of grid resolution and number of macro-particles per cell are examined. Implementation of the ionization algorithm in two different particle-in-cell codes is compared for the case of ionization-based electron injection in a laser-plasma accelerator. C1 [Chen, M.; Geddes, C. G. R.; Yu, L. L.; Esarey, E.; Schroeder, C. B.; Leemans, W. P.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Cormier-Michel, E.; Bruhwiler, David L.] Tech X Corp, Boulder, CO 80303 USA. RP Chen, M (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RI Chen, Min/A-9955-2010; Yu, Lule/P-2566-2015; OI Chen, Min/0000-0002-4290-9330; Bruhwiler, David/0000-0002-2318-8494 FU Office of Science, Office of High Energy Physics, of the U.S.Department of Energy [DE-AC02-05CH11231]; Scientific Discovery through Advanced Computing Project "Advanced Computing for 21st Century Accelerator Science and Technology" FX This work was supported by the Director, Office of Science, Office of High Energy Physics, of the U.S.Department of Energy under Contract No. DE-AC02-05CH11231 and by a Scientific Discovery through Advanced Computing Project "Advanced Computing for 21st Century Accelerator Science and Technology". Computational resources of the National Energy Research Scientific Computing Center were used to perform the simulations. NR 25 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 911 EP 916 DI 10.1063/1.4788987 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700143 ER PT S AU Wisniewski, EE Li, C Gai, W Power, J AF Wisniewski, E. E. Li, C. Gai, W. Power, J. BE Zgadzaj, R Gaul, E Downer, MC TI Generation of Annular, High-Charge Electron Beams at the Argonne Wakefield Accelerator SO ADVANCED ACCELERATOR CONCEPTS SE AIP Conference Proceedings LA English DT Proceedings Paper CT 15th Workshop on Advanced Accelerator Concepts (AAC) CY JUN 10-15, 2012 CL Univ Texas, Austin Campus, Austin, TX SP U S Dept Energy, Off High Energy Phys, Univ Texas, Bergoz Instrumentat, Coherent Inc, GMW Associates, RadiaBeam Technologies, Amplitude Technologies, Continuum, CVI Melles Griot, Muons Inc, Natl Energet, Thales Optronique, Tech-X Corp, Tech Mfg Corp, Nanolabz HO Univ Texas, Austin Campus DE beam generation; RF photocathode gun; high charge; ring beam AB We present and discuss the results from the experimental generation of high-charge annular (ring-shaped) electron beams at the Argonne Wakefield Accelerator (AWA). These beams were produced by using laser masks to project annular laser profiles of various inner and outer diameters onto the photocathode of an RF gun. The ring beam is accelerated to 15 MeV, then it is imaged by means of solenoid lenses. Transverse profiles are compared for different solenoid settings. Discussion includes a comparison with Parmela simulations, some applications of high-charge ring beams, and an outline of a planned extension of this study. C1 [Wisniewski, E. E.; Gai, W.; Power, J.] ANL HEP, Argonne, IL 60439 USA. [Wisniewski, E. E.] IIT Chicago, Chicago, IL USA. [Li, C.] Tsinghua Univ, Dept Eng Phys, Tsinghua, Peoples R China. RP Wisniewski, EE (reprint author), ANL HEP, Argonne, IL 60439 USA. FU U. S. Dept of Energy Office of Science [DE-AC02-06CH11357] FX This work was funded by the U. S. Dept of Energy Office of Science under contract number DE-AC02-06CH11357. NR 3 TC 0 Z9 0 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 978-0-7354-1125-8 J9 AIP CONF PROC PY 2012 VL 1507 BP 956 EP 958 DI 10.1063/1.4788995 PG 3 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDV13 UT WOS:000315058700151 ER PT S AU Besuner, R Bebek, C Dey, A Goble, W Joyce, D Levi, ME Reil, K Schlegel, D Sholl, M AF Besuner, Robert Bebek, Chris Dey, Arjun Goble, Will Joyce, Dick Levi, Michael E. Reil, Kevin Schlegel, David Sholl, Michael BE McLean, IS Ramsay, SK Takami, H TI Integrating BigBOSS with the Mayall Telescope SO GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IV SE Proceedings of SPIE LA English DT Proceedings Paper CT Conference on Ground-Based and Airborne Telescopes IV CY JUL 01-06, 2012 CL Amsterdam, NETHERLANDS SP SPIE DE dark energy; multi-object spectrograph; baryon acoustic oscillations; Mayall AB BigBOSS is a proposed ground-based dark energy experiment to study baryon acoustic oscillations (BAO) and the growth of large scale structure. It consists of a fiber-fed multi-object spectrograph designed to be installed on the Mayall 4-meter telescope at Kitt Peak, Arizona. BigBOSS includes an optical corrector assembly and 5000-fiber-positioner focal plane assembly that replace the existing Mayall prime focus hardware. 40-meter long optical fiber bundles are routed from the focal plane, through the telescope declination and right ascension pivots, to spectrographs in the thermally insulated FTS Laboratory, immediately adjacent to the telescope. Each of the ten spectrographs includes three separate spectral bands. The FTS Laboratory also houses support electronics, cooling, and vacuum equipment. The prime focus assembly includes mounts for the existing Mayall f/8 secondary mirror to allow observations with Cassegrain instruments. We describe the major elements of the BigBOSS instrument, plans for integrating with the Telescope, and proposed modifications and additions to existing Mayall facilities. C1 [Besuner, Robert; Sholl, Michael] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. [Bebek, Chris; Levi, Michael E.; Schlegel, David] Lawrence Berkeley Natl Lab, Lawrence, KS USA. [Dey, Arjun; Goble, Will; Joyce, Dick] Natl Optic Astron Observ, Tucson, AZ USA. [Reil, Kevin] SLAC Natl Accelerator Lab, Menlo Pk, CA USA. RP Besuner, R (reprint author), Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. FU Office of Science, of the U.S. Department of Energy [DEAC03-76SF00098] FX This work was supported by the Director, Office of Science, of the U.S. Department of Energy under Contract No. DEAC03-76SF00098. NR 9 TC 0 Z9 0 U1 0 U2 0 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 978-0-8194-9147-3 J9 PROC SPIE PY 2012 VL 8446 AR 844652 DI 10.1117/12.925497 PG 13 WC Engineering, Aerospace; Instruments & Instrumentation; Optics SC Engineering; Instruments & Instrumentation; Optics GA BDL69 UT WOS:000313675900156 ER PT S AU Cease, H DePoy, D Derylo, G Diehl, HT Estrada, J Flaugher, B Kuk, K Kuhlmann, S Lathrop, A Schultz, K Reinert, RJ Schmitt, RL Stefanik, A Zhao, A AF Cease, H. DePoy, D. Derylo, G. Diehl, H. T. Estrada, J. Flaugher, B. Kuk, K. Kuhlmann, S. Lathrop, A. Schultz, K. Reinert, R. J. Schmitt, R. L. Stefanik, A. Zhao, A. CA Dark Energy Survey Collaboration BE McLean, IS Ramsay, SK Takami, H TI Commissioning and Initial Performance of the Dark Energy Camera Liquid Nitrogen Cooling System. SO GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IV SE Proceedings of SPIE LA English DT Proceedings Paper CT Conference on Ground-Based and Airborne Telescopes IV CY JUL 01-06, 2012 CL Amsterdam, NETHERLANDS SP SPIE DE DES; DECAM; CTIO; NOAO; CCD; liquid nitrogen; pump; camera cooling AB The Dark Energy Camera and its cooling system has been shipped to Cerro Tololo Inter-American Observatory in Chile for installation onto the Blanco 4m telescope. Along with the camera, the cooling system has been installed in the Coude room at the Blanco Telescope. Final installation of the cooling system and operations on the telescope is planned for the middle of 2012. Initial commissioning experiences and cooling system performance is described. C1 [Cease, H.; Derylo, G.; Diehl, H. T.; Estrada, J.; Flaugher, B.; Kuk, K.; Lathrop, A.; Schultz, K.; Reinert, R. J.; Schmitt, R. L.; Stefanik, A.] Fermilab Natl Accelerator Lab, Box 500, Batavia, IL 60510 USA. [Kuhlmann, S.; Zhao, A.] Argonne Natl Lab, Argonne, IL 60439 USA. [DePoy, D.] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA. RP Cease, H (reprint author), Fermilab Natl Accelerator Lab, Box 500, Batavia, IL 60510 USA. EM Cease@fnal.gov RI De Vicente, Juan/H-3242-2015 OI De Vicente, Juan/0000-0001-8318-6813 NR 8 TC 1 Z9 1 U1 0 U2 3 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 978-0-8194-9147-3 J9 PROC SPIE PY 2012 VL 8446 AR 84466S DI 10.1117/12.926634 PG 10 WC Engineering, Aerospace; Instruments & Instrumentation; Optics SC Engineering; Instruments & Instrumentation; Optics GA BDL69 UT WOS:000313675900209 ER PT S AU Chilcote, JK Larkin, JE Maire, J Perrin, MD Fitzgerald, MP Doyon, R Thibault, S Bauman, B Macintosh, BA Graham, JR Saddlemyer, L AF Chilcote, Jeffrey K. Larkin, James E. Maire, Jerome Perrin, Marshall D. Fitzgerald, Michael P. Doyon, Rene Thibault, Simon Bauman, Brian Macintosh, Bruce A. Graham, James R. Saddlemyer, Les BE McLean, IS Ramsay, SK Takami, H TI Performance of the Integral Field Spectrograph for the Gemini Planet Imager SO GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IV SE Proceedings of SPIE LA English DT Proceedings Paper CT Conference on Ground-Based and Airborne Telescopes IV CY JUL 01-06, 2012 CL Amsterdam, NETHERLANDS SP SPIE DE Integral field spectrograph; Extrasolar planets ID ADAPTIVE OPTICS; STAR AB We present performance results, from in-lab testing, of the Integral Field Spectrograph (IFS) for the Gemini Planet Imager (GPI). GPI is a facility class instrument for the Gemini Observatory with the primary goal of directly detecting young Jovian planets. The GPI IFS is based on concepts from the OSIRIS instrument at Keck and utilizes an infrared transmissive lenslet array to sample a rectangular 2.8 x 2.8 arcsecond field of view. The IFS provides low-resolution spectra across five bands between 1 and 2.5 mu m. Alternatively, the dispersing element can be replaced with a Wollaston prism to provide broadband polarimetry across the same five filter bands. The IFS construction was based at the University of California, Los Angeles in collaboration with the Universite de Montreal, Immervision and Lawrence Livermore National Laboratory. During its construction, we encountered an unusual noise source from microphonic pickup by the Hawaii-2RG detector. We describe this noise and how we eliminated it through vibration isolation. The IFS has passed its preship review and was shipped to University of California, Santa Cruz at the end of 2011 for integration with the remaining sub-systems of GPI. The IFS has been integrated with the rest of GPI and is delivering high quality spectral datacubes of GPI's coronagraphic field. C1 [Chilcote, Jeffrey K.; Larkin, James E.; Fitzgerald, Michael P.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. [Maire, Jerome; Graham, James R.] Dunlap Inst Astron & Astrophys, Toronto, ON M5S3II4, Canada. [Perrin, Marshall D.] Space Telescope Sci Inst, Baltimore, MD 21218 USA. [Doyon, Rene] Univ Montreal, Dept Phys, Montreal, PQ H3C 3J7, Canada. [Thibault, Simon] Univ Laval, Dept Phys, Quebec City, PQ G1V 0A6, Canada. [Bauman, Brian; Macintosh, Bruce A.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. [Saddlemyer, Les] Herzberg Inst AstroPhys, Victoria, BC V8X 4M6, Canada. RP Chilcote, JK (reprint author), Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. EM jchilcote@astro.ucla.edu RI Fitzgerald, Michael/C-2642-2009 OI Fitzgerald, Michael/0000-0002-0176-8973 FU NSF; Particle Physics and Astronomy Research Council (UnitedKingdom); National Research Council (Canada); CONICYT(Chile); Australian Research Council(Australia); CNPq(Brazil); CONICET (Argentina); U.S.Department of Energy; Lawrence Livermore National Laboratory [DE-AC52-07NA27344] FX We would like to thank the staff of the Gemini Observatory for their collaboration on the design of our instrument.The Gemini Observatory is operated by the Association of Universities for Research in Astronomy,Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation(UnitedStates),the Particle Physics and Astronomy Research Council (UnitedKingdom),the National Research Council (Canada),CONICYT(Chile),the Australian Research Council(Australia),CNPq(Brazil), and CONICET (Argentina). Portions of this work performed under the auspices of the U.S.Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. NR 23 TC 5 Z9 5 U1 0 U2 3 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 978-0-8194-9147-3 J9 PROC SPIE PY 2012 VL 8446 AR 84468W DI 10.1117/12.925790 PG 11 WC Engineering, Aerospace; Instruments & Instrumentation; Optics SC Engineering; Instruments & Instrumentation; Optics GA BDL69 UT WOS:000313675900271 ER PT S AU Derylo, G Chi, E Diehl, HT Estrada, J Flaugher, B Schultz, K AF Derylo, Greg Chi, Edward Diehl, H. Thomas Estrada, Juan Flaugher, Brenna Schultz, Ken BE McLean, IS Ramsay, SK Takami, H TI Transport and Installation of the Dark Energy Survey CCD Imager SO GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IV SE Proceedings of SPIE LA English DT Proceedings Paper CT Conference on Ground-Based and Airborne Telescopes IV CY JUL 01-06, 2012 CL Amsterdam, NETHERLANDS SP SPIE DE Imager; transport; Blanco; CTIO AB The Dark Energy Survey CCD imager was constructed at the Fermi National Accelerator Laboratory and delivered to the Cerro Tololo Inter-American Observatory in Chile for installation onto the Blanco 4m telescope. Several efforts are described relating to preparation of the instrument for transport, development and testing of a shipping crate designed to minimize transportation loads transmitted to the camera, and inspection of the imager upon arrival at the observatory. Transportation loads were monitored and are described. For installation of the imager at the telescope prime focus, where it mates with its previously-installed optical corrector, specialized tooling was developed to safely lift, support, and position the vessel. The installation and removal processes were tested on the Telescope Simulator mockup at FNAL, thus minimizing technical and schedule risk for the work performed at CTIO. Final installation of the imager is scheduled for August 2012. C1 [Derylo, Greg; Chi, Edward; Diehl, H. Thomas; Estrada, Juan; Flaugher, Brenna; Schultz, Ken] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Derylo, G (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM Derylo@fnal.gov NR 5 TC 2 Z9 2 U1 0 U2 0 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 978-0-8194-9147-3 J9 PROC SPIE PY 2012 VL 8446 AR 84466J DI 10.1117/12.925390 PG 11 WC Engineering, Aerospace; Instruments & Instrumentation; Optics SC Engineering; Instruments & Instrumentation; Optics GA BDL69 UT WOS:000313675900200 ER PT S AU Doel, P Brooks, D Antonik, ML Flaugher, BL Stefanik, A Kent, SM Gutierrez, G Cease, HP Abbott, TM Walker, AR DePoy, DL Bernstein, RA Worswick, S AF Doel, Peter Brooks, David Antonik, Michelle L. Flaugher, Brenna L. Stefanik, Andrew Kent, Stephen M. Gutierrez, Gaston Cease, Herman P. Abbott, Timothy M. Walker, Alistair R. DePoy, Darren L. Bernstein, Rebecca A. Worswick, Sue BE McLean, IS Ramsay, SK Takami, H TI Assembly, alignment, and testing of the DECam wide field corrector optics SO GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IV SE Proceedings of SPIE LA English DT Proceedings Paper CT Conference on Ground-Based and Airborne Telescopes IV CY JUL 01-06, 2012 CL Amsterdam, NETHERLANDS SP SPIE DE wide field corrector; alignment; dark energy AB The DES project is a 5 year imaging survey of the southern sky using the 4m Blanco Telescope at the Cerro Tololo International Observatory in Chile. A new wide field camera with a 2.2 degree diameter field of view has been built to undertake this survey. The alignment of the large lenses for this camera poses a significant challenge as they have to be aligned to a tolerance of +/-50 micrometers. This paper presents the assembly and alignment process of the full optical system along with the test results. Also included is the predicted imaging performance from the as-built system. C1 [Doel, Peter; Brooks, David; Antonik, Michelle L.] UCL, Dept Phys, Gower St, London WC1E 6BT, England. [Flaugher, Brenna L.; Stefanik, Andrew; Kent, Stephen M.; Gutierrez, Gaston; Cease, Herman P.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. [Abbott, Timothy M.; Walker, Alistair R.] Cerro Tololo Interamer Observ, Region Coquimbo, Chile. [DePoy, Darren L.] Texas A&M Univ, Dept Phys, College Stn, TX 77843 USA. [Bernstein, Rebecca A.] Dept Astron & Astrophys, Lick Observ, Santa Cruz, CA 95064 USA. [Worswick, Sue] Observ Opt Ltd, London, England. RP Doel, P (reprint author), UCL, Dept Phys, Gower St, London WC1E 6BT, England. NR 6 TC 2 Z9 2 U1 0 U2 0 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 978-0-8194-9147-3 J9 PROC SPIE PY 2012 VL 8446 AR 84466F DI 10.1117/12.926590 PG 9 WC Engineering, Aerospace; Instruments & Instrumentation; Optics SC Engineering; Instruments & Instrumentation; Optics GA BDL69 UT WOS:000313675900197 ER PT S AU Edelstein, J Erskine, D Sirk, M Vanderburg, A Wishnow, EH AF Edelstein, Jerry Erskine, David Sirk, Martin Vanderburg, Andrew Wishnow, Edward H. BE McLean, IS Ramsay, SK Takami, H TI Enhanced spectral resolution via externally dispersed interferometry SO GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IV SE Proceedings of SPIE LA English DT Proceedings Paper CT Conference on Ground-Based and Airborne Telescopes IV CY JUL 01-06, 2012 CL Amsterdam, NETHERLANDS SP SPIE DE High resolution spectroscopy; externally dispersed interferometry; Doppler velocimetry AB Externally dispersed interferometry (EDI) uses a hybrid spectrometer that combines a Michelson interferometer in series with a grating spectrometer. EDI provides a means of deriving spectral information at a resolution substantially higher than that provided by the grating spectrograph alone. Near IR observations have been conducted using the Triplespec spectrometer mounted on the 5m Hale telescope. Spectra have been reconstructed at a resolution of similar to 27000 where the resolution of Triplespec is similar to 2700. Progress in the development of the EDI technique is reported herein emphasizing studies related to the accuracy of the reconstructed spectra. C1 [Edelstein, Jerry; Sirk, Martin; Vanderburg, Andrew; Wishnow, Edward H.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. [Erskine, David] Lawrence Livermore Natl Lab, Livermore, CA USA. RP Edelstein, J (reprint author), Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. OI Vanderburg, Andrew/0000-0001-7246-5438 FU National Science Foundation [AST-096064]; NASA [NNX09AB38G] FX This work was supported by the National Science Foundation grant AST-096064 and NASA grant NNX09AB38G. Observations were conducted at the Mt. Palomar Observatory and the expertise of the support staff is much appreciated. We also benefited from assistance from P. Muirhead, J. Lloyd, and M. Muterspaugh during the observations and analysis. NR 10 TC 1 Z9 1 U1 1 U2 1 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 978-0-8194-9147-3 J9 PROC SPIE PY 2012 VL 8446 AR 84464J DI 10.1117/12.928290 PG 8 WC Engineering, Aerospace; Instruments & Instrumentation; Optics SC Engineering; Instruments & Instrumentation; Optics GA BDL69 UT WOS:000313675900137 ER PT S AU Flaugher, BL Abbott, TMC Angstadt, R Annis, J Antonik, ML Bailey, J Ballester, O Bernstein, JP Bernstein, R Bonati, M Bremer, G Briones, J Brooks, D Buckley-Geer, EJ Campa, J Cardiel-Sas, L Castander, F Castilla, J Cease, H Chappa, S Chi, EC da Costa, L DePoy, DL Derylo, G de Vicente, J Diehl, HT Doel, P Estrada, J Eiting, J Elliott, AE Finley, DA Flores, R Josh, F Gaztanaga, E Gerdes, D Gladders, M Guarino, V Gutierrez, G Grudzinski, J Hanlon, B Hao, JG Holland, S Honscheid, K Huffman, D Jackson, C Jonas, M Karliner, I Kau, D Kent, S Kozlovsky, M Krempetz, K Krider, J Kubik, D Kuehn, KW Kuhlmann, SE Kuk, K Lahav, O Langellier, N Lathrop, A Lewis, PM Lin, H Lorenzon, W Martinez, G McKaye, T Merritt, W Meyer, M Miquel, R Morgan, J Moore, P Moore, T Neilsen, E Nord, B Ogando, R Olsen, J Patton, K Peoples, J Plazas, A Qian, T Roe, N Roodman, A Rossetto, B Sanchez, E Soares-Santos, M Scarpine, V Schalk, T Schindler, R Schmidt, R Schmitt, R Schubnell, M Schultz, K Selen, M Serrano, S Shaw, T Simaitis, V Slaughter, J Smith, RC Spinka, H Stefanik, A Stuermer, W Sypniewski, A Talaga, R Tarle, G Thaler, J Tucker, D Walker, AR Weaverdyck, C Wester, W Woods, RJ Worswick, S Zhao, A AF Flaugher, Brenna L. Abbott, Timothy M. C. Angstadt, Robert Annis, Jim Antonik, Michelle L. Bailey, Jim Ballester, Otger Bernstein, Joseph P. Bernstein, Rebbeca Bonati, Marco Bremer, Gale Briones, Jorge Brooks, David Buckley-Geer, Elizabeth J. Campa, Juila Cardiel-Sas, Laia Castander, Franciso Castilla, Javier Cease, Herman Chappa, Steve Chi, Edward C. da Costa, Luis DePoy, Darren L. Derylo, Gregory de Vicente, Juan Diehl, H. Thomas Doel, Peter Estrada, Juan Eiting, Jacob Elliott, Anne E. Finley, David A. Flores, Rolando Frieman, Josh Gaztanaga, Enrique Gerdes, David Gladders, Mike Guarino, V. Gutierrez, G. Grudzinski, Jim Hanlon, Bill Hao, Jiangang Holland, Steve Honscheid, Klaus Huffman, Dave Jackson, Cheryl Jonas, Michelle Karliner, Inga Kau, Daekwang Kent, Steve Kozlovsky, Mark Krempetz, Kurt Krider, John Kubik, Donna Kuehn, Kyler W. Kuhlmann, Stephen E. Kuk, Kevin Lahav, Ofer Langellier, Nick Lathrop, Andrew Lewis, Peter M. Lin, Huan Lorenzon, Wolfgang Martinez, Gustavo McKaye, Timothy Merritt, Wyatt Meyer, Mark Miquel, Ramon Morgan, Jim Moore, Peter Moore, Todd Neilsen, Eric Nord, Brian Ogando, R. Olsen, Jamieson Patton, Kenneth Peoples, John Plazas, Andres Qian, Tao Roe, Natalie Roodman, Aaron Rossetto, B. Sanchez, E. Soares-Santos, Marcelle Scarpine, Vic Schalk, Terry Schindler, Rafe Schmidt, Ricardo Schmitt, Richard Schubnell, Mike Schultz, Kenneth Selen, M. Serrano, Santiago Shaw, Terri Simaitis, Vaidis Slaughter, Jean Smith, R. Christopher Spinka, Hal Stefanik, Andy Stuermer, Walter Sypniewski, Adam Talaga, Rick Tarle, Greg Thaler, Jon Tucker, Doug Walker, Alistair R. Weaverdyck, Curtis Wester, William Woods, Robert J. Worswick, Sue Zhao, Allen BE McLean, IS Ramsay, SK Takami, H TI Status of the Dark Energy Survey Camera (DECam) Project SO GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IV SE Proceedings of SPIE LA English DT Proceedings Paper CT Conference on Ground-Based and Airborne Telescopes IV CY JUL 01-06, 2012 CL Amsterdam, NETHERLANDS SP SPIE DE Dark Energy; CCD; camera; survey; Blanco; CTIO; imaging ID CHARGE-COUPLED-DEVICES AB The Dark Energy Survey Collaboration has completed construction of the Dark Energy Camera (DECam), a 3 square degree, 570 Megapixel CCD camera which will be mounted on the Blanco 4-meter telescope at CTIO. DECam will be used to perform the 5000 sq. deg. Dark Energy Survey with 30% of the telescope time over a 5 year period. During the remainder of the time, and after the survey, DECam will be available as a community instrument. All components of DECam have been shipped to Chile and post-shipping checkout finished in Jan. 2012. Installation is in progress. A summary of lessons learned and an update of the performance of DECam and the status of the DECam installation and commissioning will be presented. C1 [Flaugher, Brenna L.; Angstadt, Robert; Annis, Jim; Buckley-Geer, Elizabeth J.; Cease, Herman; Chappa, Steve; Chi, Edward C.; Derylo, Gregory; Diehl, H. Thomas; Estrada, Juan; Finley, David A.; Flores, Rolando; Frieman, Josh; Gutierrez, G.; Hao, Jiangang; Huffman, Dave; Jackson, Cheryl; Jonas, Michelle; Kent, Steve; Kozlovsky, Mark; Krempetz, Kurt; Krider, John; Kubik, Donna; Kuk, Kevin; Lathrop, Andrew; Lin, Huan; Merritt, Wyatt; Neilsen, Eric; Olsen, Jamieson; Peoples, John; Soares-Santos, Marcelle; Scarpine, Vic; Schmitt, Richard; Schultz, Kenneth; Shaw, Terri; Slaughter, Jean; Stefanik, Andy; Stuermer, Walter; Tucker, Doug; Wester, William; Woods, Robert J.] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. RP Flaugher, BL (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM Brenna@fnal.gov RI Holland, Stephen/H-7890-2013; Martinez Botella, Gustavo/K-8834-2014; Ogando, Ricardo/A-1747-2010; De Vicente, Juan/H-3242-2015; Sanchez, Eusebio/H-5228-2015; Gaztanaga, Enrique/L-4894-2014; OI Martinez Botella, Gustavo/0000-0002-1061-8520; Ogando, Ricardo/0000-0003-2120-1154; De Vicente, Juan/0000-0001-8318-6813; Sanchez, Eusebio/0000-0002-9646-8198; Gaztanaga, Enrique/0000-0001-9632-0815; Hao, Jiangang/0000-0003-0502-7571; Tucker, Douglas/0000-0001-7211-5729 FU U.S. Department of Energy; U.S. National Science Foundation; Ministry of Science and Education of Spain; Science and Technology Facilities Council of the United Kingdom; Higher Education Funding Council for England; National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign; Kavli Institute of Cosmological Physics at the University of Chicago; Financiadora de Estudos e Projetos; Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro; Conselho Nacional de Desenvolvimento Cientifico e Tecnolcgico; Ministerio da Ciencia e Tecnologia; cluster of excellence "Origin and Structure of the Universe"; Argonne National Laboratories; University of California at Santa Cruz; University of Cambridge; Centro de Investigaciones Energeticas; Medioambientales y Tecnologicas-Madrid; University of Chicago; University College London; DES-Brazil; Fermilab; University of Edinburgh; University of Illinois at Urbana-Champaign; Institut de Ciencies de l'Espai (IEEC/CSIC); Institut de Fisica d'Altes Energies; Lawrence Berkeley National Laboratory; Ludwig-Maximilians Universitat; University of Michigan; National Optical Astronomy Observatory; University of Nottingham; Ohio State University; University of Pennsylvania; University of Portsmouth; SLAC; Stanford University; University of Sussex; Fermi Research Alliance, LLC [DE-AC02-07CH11359]; United States Department of Energy FX Funding for the DES Projects has been provided by the U.S. Department of Energy, the U.S. National Science Foundation, the Ministry of Science and Education of Spain, the Science and Technology Facilities Council of the United Kingdom, the Higher Education Funding Council for England, the National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign, the Kavli Institute of Cosmological Physics at the University of Chicago, Financiadora de Estudos e Projetos, Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de Janeiro, Conselho Nacional de Desenvolvimento Cientifico e Tecnolcgico and the Ministerio da Ciencia e Tecnologia, the German Research Foundation sponsored cluster of excellence "Origin and Structure of the Universe" and the Collaborating Institutions in the Dark Energy Survey.; The Collaborating Institutions are Argonne National Laboratories, the University of California at Santa Cruz, the University of Cambridge, Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas-Madrid, the University of Chicago, University College London, DES-Brazil, Fermilab, the University of Edinburgh, the University of Illinois at Urbana-Champaign, the Institut de Ciencies de l'Espai (IEEC/CSIC), the Institut de Fisica d'Altes Energies, the Lawrence Berkeley National Laboratory, the Ludwig-Maximilians Universitat, the University of Michigan, the National Optical Astronomy Observatory, the University of Nottingham, the Ohio State University, the University of Pennsylvania, the University of Portsmouth, SLAC, Stanford University, and the University of Sussex.; Fermilab is operated by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the United States Department of Energy. NR 22 TC 22 Z9 22 U1 0 U2 6 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 978-0-8194-9147-3 J9 PROC SPIE PY 2012 VL 8446 AR 844611 DI 10.1117/12.926216 PG 15 WC Engineering, Aerospace; Instruments & Instrumentation; Optics SC Engineering; Instruments & Instrumentation; Optics GA BDL69 UT WOS:000313675900032 ER PT S AU Jelinsky, P Bebek, C Besuner, R Carton, PH Edelstein, J Lampton, M Levi, ME Poppett, C Prieto, E Schlegel, D Sholl, M AF Jelinsky, Patrick Bebek, Chris Besuner, Robert Carton, Pierre-Henri Edelstein, Jerry Lampton, Michael Levi, Michael E. Poppett, Claire Prieto, Eric Schlegel, David Sholl, Michael BE McLean, IS Ramsay, SK Takami, H TI The BigBOSS Spectrograph SO GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IV SE Proceedings of SPIE LA English DT Proceedings Paper CT Conference on Ground-Based and Airborne Telescopes IV CY JUL 01-06, 2012 CL Amsterdam, NETHERLANDS SP SPIE DE dark energy; multi-object spectrograph; baryon acoustic oscillations; Mayall Telescope AB BigBOSS is a proposed ground-based dark energy experiment to study baryon acoustic oscillations (BAO) and the growth of structure with a 14,000 square degree galaxy and quasi-stellar object redshift survey. It consists of a 5,000-fiber-positioner focal plane feeding the spectrographs. The optical fibers are separated into ten 500 fiber slit heads at the entrance of ten identical spectrographs in a thermally insulated room. Each of the ten spectrographs has a spectral resolution (lambda/Delta lambda) between 1500 and 4000 over a wavelength range from 360 - 980 nm. Each spectrograph uses two dichroic beam splitters to separate the spectrograph into three arms. It uses volume phase holographic (VPH) gratings for high efficiency and compactness. Each arm uses a 4096x4096 15 mu m pixel charge coupled device (CCD) for the detector. We describe the requirements and current design of the BigBOSS spectrograph. Design trades (e.g. refractive versus reflective) and manufacturability are also discussed. C1 [Jelinsky, Patrick; Besuner, Robert; Edelstein, Jerry; Lampton, Michael; Sholl, Michael] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. [Bebek, Chris; Levi, Michael E.; Poppett, Claire; Prieto, Eric] Lawrence Berkeley Natl Lab, Berkeley, CA USA. [Carton, Pierre-Henri] CEA Saclay, Gif Sur Yvette, France. [Prieto, Eric] Lab Astrophys Marseille, Marseille, France. RP Jelinsky, P (reprint author), Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. FU Office of Science, of the U. S. Department of Energy [DEAC03- 76SF00098] FX This work was supported by the Director, Office of Science, of the U. S. Department of Energy under Contract No. DEAC03- 76SF00098. NR 10 TC 2 Z9 2 U1 0 U2 1 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 978-0-8194-9147-3 J9 PROC SPIE PY 2012 VL 8446 AR 844668 DI 10.1117/12.925451 PG 12 WC Engineering, Aerospace; Instruments & Instrumentation; Optics SC Engineering; Instruments & Instrumentation; Optics GA BDL69 UT WOS:000313675900191 ER PT S AU Leisenring, JM Skrutskie, MF Hinz, PM Skemer, A Bailey, V Eisner, J Garnavich, P Hoffmann, WF Jones, T Kenworthy, M Kuzmenko, P Meyer, M Nelson, M Rodigas, TJ Wilson, JC Vaitheeswaran, V AF Leisenring, J. M. Skrutskie, M. F. Hinz, P. M. Skemer, A. Bailey, V. Eisner, J. Garnavich, P. Hoffmann, W. F. Jones, T. Kenworthy, M. Kuzmenko, P. Meyer, M. Nelson, M. Rodigas, T. J. Wilson, J. C. Vaitheeswaran, V. BE McLean, IS Ramsay, SK Takami, H TI On-sky operations and performance of LMIRcam at the Large Binocular Telescope SO GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IV SE Proceedings of SPIE LA English DT Proceedings Paper CT Conference on Ground-Based and Airborne Telescopes IV CY JUL 01-06, 2012 CL Amsterdam, NETHERLANDS SP SPIE DE Infrared; Interferometry; Fizeau; HgCdTe detectors ID APODIZING PHASE PLATE; VY-CANIS-MAJORIS; 3-DIMENSIONAL MORPHOLOGY; MU-M; IMAGES; EJECTA AB The L/M-band (3-5 mu m) InfraRed Camera (LMIRcam) sits at the combined focal plane of the Large Binocular Telescope Interferometer (LBTI), ultimately imaging the coherently combined focus of the LBT's two 8.4-meter mirrors. LMIRcam achieved first light at the LBT in May 2011 using a single AO-enabled 8.4-meter aperture. With the delivery of LBT's final adaptive secondary mirror in Fall of 2011, dual-aperture AO-corrected interferometric fringes were realized in April 2012. We report on the performance of these configurations and characterize the noise performance of LMIRcam's HAWAII-2RG 5.3-mu m cutoff array paired with Cornell FORCAST readout electronics. In addition, we describe recent science highlights and discuss future improvements to the LMIRcam hardware. C1 [Leisenring, J. M.; Meyer, M.] ETH, Wolfgang Pauli Str 27, CH-8093 Zurich, Switzerland. [Skrutskie, M. F.; Nelson, M.; Wilson, J. C.] Univ Virginia, Charlottesville, VA 22904 USA. [Hinz, P. M.; Skemer, A.; Bailey, V.; Eisner, J.; Hoffmann, W. F.; Rodigas, T. J.; Vaitheeswaran, V.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA. [Garnavich, P.] Univ Notre Dame, Notre Dame, IN 46556 USA. [Jones, T.] Univ Minnesota, Minneapolis, MN 55455 USA. [Kenworthy, M.] Leiden Univ, Leiden Observ, NL-2300 RA Leiden, Netherlands. [Kuzmenko, P.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Leisenring, JM (reprint author), ETH, Wolfgang Pauli Str 27, CH-8093 Zurich, Switzerland. OI Skemer, Andrew/0000-0001-6098-3924; Bailey, Vanessa/0000-0002-5407-2806 FU National Science Foundation [AST-0705296] FX The National Science Foundation supported this work under Grant No. AST-0705296 at both the University of Virginia and the University of Minnesota. The LMIRcam team is grateful for the support received from the LBT organization and its partner members. NR 23 TC 11 Z9 11 U1 0 U2 3 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 978-0-8194-9147-3 J9 PROC SPIE PY 2012 VL 8446 AR 84464F DI 10.1117/12.924814 PG 16 WC Engineering, Aerospace; Instruments & Instrumentation; Optics SC Engineering; Instruments & Instrumentation; Optics GA BDL69 UT WOS:000313675900134 ER PT S AU Macintosh, BA Anthony, A Atwood, J Barriga, N Bauman, B Caputa, K Chilcote, J Dillon, D Doyon, R Dunn, J Gavel, DT Galvez, R Goodsell, S Graham, JR Hartung, M Isaacs, J Kerley, D Konopacky, Q Labrie, K Larkin, J Maire, J Marois, C Millar-Blanchaer, M Nunez, A Oppenheimer, B Palmer, D Pazder, J Perrin, M Poyneer, LA Quiroz, C Rantakyro, F Reshtov, V Saddlemyer, L Sadakuni, N Savransky, D Sivaramakrishnan, A Smith, M Soummer, R Thomas, S Wallace, JK Weiss, J Wiktorowicz, S AF Macintosh, Bruce A. Anthony, Andre Atwood, Jenny Barriga, Nicolas Bauman, Brian Caputa, Kris Chilcote, Jeffery Dillon, Daren Doyon, Rene Dunn, Jennifer Gavel, Donald T. Galvez, Ramon Goodsell, Stephen Graham, James R. Hartung, Markus Isaacs, Joshua Kerley, Dan Konopacky, Quinn Labrie, Kathleen Larkin, James Maire, Jerome Marois, Christian Millar-Blanchaer, Max Nunez, Arturo Oppenheimer, Ben Palmer, David Pazder, John Perrin, Marshall Poyneer, Lisa A. Quiroz, Carlos Rantakyro, Fredrik Reshtov, Vlad Saddlemyer, Les Sadakuni, Naru Savransky, Dmitry Sivaramakrishnan, Anand Smith, Malcolm Soummer, Remi Thomas, Sandrine Wallace, J. Kent Weiss, Jason Wiktorowicz, Sloane BE McLean, IS Ramsay, SK Takami, H TI The Gemini Planet Imager: Integration and Test SO GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IV SE Proceedings of SPIE LA English DT Proceedings Paper CT Conference on Ground-Based and Airborne Telescopes IV CY JUL 01-06, 2012 CL Amsterdam, NETHERLANDS SP SPIE DE Adaptive optics; extrasolar planets; coronagraphy; integral field spectrograph ID POINT-SPREAD FUNCTIONS; CORONAGRAPHS; ASTROMETRY; PHOTOMETRY; SYSTEMS; DESIGN AB The Gemini Planet Imager is a next-generation instrument for the direct detection and characterization of young warm exoplanets, designed to be an order of magnitude more sensitive than existing facilities. It combines a 1700-actuator adaptive optics system, an apodized-pupil Lyot coronagraph, a precision interferometric infrared wavefront sensor, and a integral field spectrograph. All hardware and software subsystems are now complete and undergoing integration and test at UC Santa Cruz. We will present test results on each subsystem and the results of end-to-end testing. In laboratory testing, GPI has achieved a raw contrast (without post-processing) of 10(-6) 5 sigma at 0.4 '', and with multiwavelength speckle suppression, 2x10(-7) at the same separation. C1 [Macintosh, Bruce A.; Bauman, Brian; Palmer, David; Poyneer, Lisa A.; Savransky, Dmitry] Lawrence Livermore Natl Lab, 7000 East Ave,L-210, Livermore, CA 94040 USA. [Barriga, Nicolas; Goodsell, Stephen; Hartung, Markus; Nunez, Arturo; Thomas, Sandrine] Gemini Observ, Hilo, HI 96720 USA. [Dillon, Daren; Graham, James R.; Sadakuni, Naru] Univ Calif, Dept Astron, Berkeley, CA 94720 USA. [Doyon, Rene] Univ Montreal, Dept Phys, Montreal H3C 3J7, PQ, Canada. [Gavel, Donald T.; Wiktorowicz, Sloane] UC Santa Cruz, Santa Cruz, CA USA. [Chilcote, Jeffery] UC Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA. [Oppenheimer, Ben] Amer Museum Nat Hist, Dept Astrophys, New York, NY 10024 USA. [Anthony, Andre; Atwood, Jenny; Pazder, John; Reshtov, Vlad] Herzberg Inst Astrophys, Victoria, BC V8X 4M6, Canada. [Wallace, J. Kent] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA. [Perrin, Marshall; Sivaramakrishnan, Anand; Soummer, Remi] Space Telescope Sci Inst, Baltimore, MD 21218 USA. [Konopacky, Quinn; Millar-Blanchaer, Max] Univ Toronto, Dunlap Inst, Toronto, ON M5S 3H4, Canada. [Isaacs, Joshua] Univ Wisconsin, Madison, WI 53706 USA. RP Macintosh, BA (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave,L-210, Livermore, CA 94040 USA. RI Savransky, Dmitry/M-1298-2014; Barriga, Nicolas/M-8398-2015 OI Savransky, Dmitry/0000-0002-8711-7206; Barriga, Nicolas/0000-0002-1914-3840 NR 27 TC 16 Z9 16 U1 0 U2 2 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 978-0-8194-9147-3 J9 PROC SPIE PY 2012 VL 8446 AR 84461U DI 10.1117/12.926721 PG 9 WC Engineering, Aerospace; Instruments & Instrumentation; Optics SC Engineering; Instruments & Instrumentation; Optics GA BDL69 UT WOS:000313675900057 ER PT S AU Marshall, JL Kent, SM Diehl, HT Flaugher, B Frieman, J Kron, RG DePoy, DL Colless, M Saunders, W Smith, GA Lahav, O Abdalla, F Brooks, D Doel, P Kirk, D Annis, J Lin, H Marriner, JP Jouvel, S Seiffert, MD AF Marshall, J. L. Kent, Stephen M. Diehl, H. Thomas Flaugher, Brenna Frieman, Joshua Kron, Richard G. DePoy, D. L. Colless, Matthew Saunders, Will Smith, Greg A. Lahav, Ofer Abdalla, Filipe Brooks, David Doel, Peter Kirk, Donnacha Annis, James Lin, Huan Marriner, John P. Jouvel, Stephanie Seiffert, Michael D. BE McLean, IS Ramsay, SK Takami, H TI The Dark Energy Spectrometer-A Potential Multi-Fiber Instrument for the Blanco 4-meter Telescope SO GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY IV SE Proceedings of SPIE LA English DT Proceedings Paper CT Conference on Ground-Based and Airborne Telescopes IV CY JUL 01-06, 2012 CL Amsterdam, NETHERLANDS SP SPIE DE dark energy; fiber spectrometers; wide field spectroscopy AB We describe the preliminary design of the Dark Energy Spectrometer (DESpec), a fiber-fed spectroscopic instrument concept for the Blanco 4-meter telescope at Cerro Tololo Inter-American Observatory (CTIO). DESpec would take advantage of the infrastructure recently deployed for the Dark Energy Camera (DECam). DESpec would be mounted in the new DECam prime focus cage, would be interchangeable with DECam, would share the DECam optical corrector, and would feature a focal plane with similar to 4000 robotically positioned optical fibers feeding multiple high-throughput spectrometers. The instrument would have a field of view of 3.8 square degrees, a wavelength range of approximately 500 10 s) is a major advance and enables new types of experiments at the interface of atomic and nuclear physics. C1 [Brandau, C.; Mueller, A.; Bernhardt, D.; Schippers, S.] Univ Giessen, Inst Atom & Mol Phys, D-35392 Giessen, Germany. [Brandau, C.; Kozhuharov, C.; Litvinov, Yu. A.; Bosch, F.; Dimopoulou, C.; Gumberidze, A.; Heil, M.; Nolden, F.; Reifarth, R.; Simon, H.; Spillmann, U.; Steck, M.; Stoehlker, Th.; Winckler, N.; Winters, D. F. A.] GSI Helmholtzzentrum Schwerionenforschung, D-64291 Darmstadt, Germany. [Bernstein, L. A.; Schneider, D.; Wiedeking, M.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. [Currell, F. J.] Queens Univ, Sch Math & Phys, Belfast, Antrim BT7 1NN, North Ireland. [Stachura, Z.] Instytut Fizyki Jadrowej, PL-31342 Krakow, Poland. [Winckler, N.] Max Planck Inst Kernphysik, D-69117 Heidelberg, Germany. [Gumberidze, A.] GSI Helmholtzzentrum Schwerionenforschung, ExtreMe Matter Inst, D-64291 Darmstadt, Germany. [Stoehlker, Th.; Winters, D. F. A.] Heidelberg Univ, D-69120 Heidelberg, Germany. [Gumberidze, A.] Frankfurt Inst Adv Studies FIAS, D-60438 Frankfurt, Germany. RP Brandau, C (reprint author), Univ Giessen, Inst Atom & Mol Phys, D-35392 Giessen, Germany. EM c.brandau@gsi.de RI Muller, Alfred/A-3548-2009; Schippers, Stefan/A-7786-2008; OI Muller, Alfred/0000-0002-0030-6929; Schippers, Stefan/0000-0002-6166-7138; Currell, Frederick/0000-0001-9280-4724 NR 7 TC 2 Z9 2 U1 2 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 062042 DI 10.1088/1742-6596/388/6/062042 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700427 ER PT S AU Covington, AM Aguilar, A Covington, IR Hinojosa, G Shirley, CA Phaneuf, RA Alvarez, I Cisneros, C Dominguez-Lopez, I Sant'Anna, MM Schlachter, AS Ballance, CP McLaughlin, BM AF Covington, A. M. Aguilar, A. Covington, I. R. Hinojosa, G. Shirley, C. A. Phaneuf, R. A. Alvarez, I. Cisneros, C. Dominguez-Lopez, I. Sant'Anna, M. M. Schlachter, A. S. Ballance, C. P. McLaughlin, B. M. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Valence-shell photoionization of Cl-like Ar+ Ions SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast ID ORION ASSOCIATION; ABUNDANCES; STARS AB High-resolution photoionization cross-section measurements for the Cl-like ion Ar+ made at the Advanced Light Source are compared with 48-level semi-relativistic Breit-Pauli R-matrix calculations. C1 [Covington, A. M.; Aguilar, A.; Covington, I. R.; Hinojosa, G.; Shirley, C. A.; Phaneuf, R. A.] Univ Nevada, Dept Phys, MS 220, Reno, NV 89557 USA. [Aguilar, A.; Dominguez-Lopez, I.; Sant'Anna, M. M.; Schlachter, A. S.] Lawrence Berkeley Natl Lab, Adv Light Source Lawrence Berkeley, Berkeley, CA 94720 USA. [Hinojosa, G.] Ctr Nacl Metrologia, Queretaro 76900, Mexico. [Alvarez, I.; Cisneros, C.; Dominguez-Lopez, I.] Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, Mexico. [Sant'Anna, M. M.] Univ Fed Rio Janeiro, Inst Fis, Rio De Janeiro, Brazil. [Ballance, C. P.] Auburn Univ, Dept Phys, Auburn, AL 36849 USA. [McLaughlin, B. M.] Queens Univ Belfast, Sch Math & Phys, Mol & Opt Phys, Ctr Theoret Atom, Belfast BT7 1NN, Antrim, North Ireland. [McLaughlin, B. M.] ITAMP, Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA. RP Covington, AM (reprint author), Univ Nevada, Dept Phys, MS 220, Reno, NV 89557 USA. EM phaneuf@unr.edu; b.mclaughlin@qub.ac.uk RI Sant'Anna, Marcelo/B-9355-2013; Dominguez-Lopez, Ivan/B-6072-2016 OI Sant'Anna, Marcelo/0000-0001-5342-5799; Dominguez-Lopez, Ivan/0000-0001-8084-8711 NR 4 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 022035 DI 10.1088/1742-6596/388/2/022035 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700086 ER PT S AU Fang, L Osipov, T Murphy, B Juranic, P Berrah, N Kukk, E Ueda, K Feifel, R van der Meulen, P Salen, P Schmidt, H Thomas, R Larsson, M Richter, R Prince, KC Bozek, JD Bostedt, C Wada, S Piancastelli, M Tashiro, M Ehara, M Tarantelli, F AF Fang, L. Osipov, T. Murphy, B. Juranic, P. Berrah, N. Kukk, E. Ueda, K. Feifel, R. van der Meulen, P. Salen, P. Schmidt, H. Thomas, R. Larsson, M. Richter, R. Prince, K. C. Bozek, J. D. Bostedt, C. Wada, S. Piancastelli, M. Tashiro, M. Ehara, M. Tarantelli, F. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Multiple Ionization and Double Core-Hole Production in Molecules using the LCLS X-Ray FEL SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB We used the world's first hard x-ray FEL to investigate the response of molecular systems to the ultra-intense, femtosecond x-ray radiation. We report sequential multiphoton ionization, frustrated absorption and double core hole production mechanisms. C1 [Fang, L.; Osipov, T.; Murphy, B.; Juranic, P.; Berrah, N.] Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA. [Kukk, E.] Univ Turku, Dept Phys & Astron, FI-20014 Turku, Finland. [Ueda, K.] Tohoku Univ, IMRAM, Sendai, Miyagi 9808577, Japan. [Thomas, R.] Uppsala Univ, Dept Phys & Astron, SE-75121 Uppsala, Sweden. [van der Meulen, P.; Salen, P.; Schmidt, H.; Thomas, R.; Larsson, M.] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden. [Richter, R.; Prince, K. C.] Sincrotrone Trieste, Elettra & FermigElettra, Trieste, Italy. [Bozek, J. D.; Bostedt, C.; Wada, S.] LCLS, SLAC, Menlo Pk, CA 94025 USA. [Tashiro, M.; Ehara, M.] Inst Mol Sci, Okazaki, Aichi 4448585, Japan. [Tarantelli, F.] Univ Perugia, Dipartimento Chim, I-06123 Perugia, Italy. RP Fang, L (reprint author), Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA. EM nora.berrah@wmich.edu RI Bozek, John/E-9260-2010; Tarantelli, Francesco/H-5798-2013; Feifel, Raimund/A-4441-2009; Juranic, Pavle/E-7187-2017; OI Bozek, John/0000-0001-7486-7238; Tarantelli, Francesco/0000-0002-1285-0606; Feifel, Raimund/0000-0001-5234-3935; Juranic, Pavle/0000-0003-4174-1924; RICHTER, Robert/0000-0001-8585-626X FU DOE; BES; MEXT; JST; JSPS; Swedish (VR) Research Council funding FX The work was partly supported by DOE, BES, MEXT, JST, JSPS and Swedish (VR) Research Council funding. NR 5 TC 0 Z9 0 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 032028 DI 10.1088/1742-6596/388/3/032028 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700191 ER PT S AU Fontes, CJ Colgan, J Zhang, HL Abdallah, J Hungerford, AL Fryer, CL Kilcrease, DP AF Fontes, C. J. Colgan, J. Zhang, H. L. Abdallah, J., Jr. Hungerford, A. L. Fryer, C. L. Kilcrease, D. P. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Atomic Data and the Modeling of Supernova Light Curves SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast ID OPACITIES; PLASMAS AB We report on preliminary efforts to apply non-local thermodynamic equilibrium (NLTE) effects in the modeling of light curves for Type Ia supernovae. Significant differences are obtained for the opacity of iron at relevant conditions when account is taken of non-thermal electrons resulting from the down-scattering of gamma rays that arise from the radioactive decay of nickel and cobalt. These results provide evidence that a more precise, detailed investigation is warranted. C1 [Fontes, C. J.; Zhang, H. L.] Los Alamos Natl Lab, Computat Phys Div, POB 1663, Los Alamos, NM 87545 USA. [Colgan, J.; Abdallah, J., Jr.; Kilcrease, D. P.] Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. [Hungerford, A. L.] Alamos Natl Lab, Theoret Design Div, Los Alamos, NM 87545 USA. [Fryer, C. L.] Alamos Natl Lab, Comp Computat & Stat Sci Div, Los Alamos, NM 87545 USA. RP Fontes, CJ (reprint author), Los Alamos Natl Lab, Computat Phys Div, POB 1663, Los Alamos, NM 87545 USA. EM cjf@lanl.gov OI Colgan, James/0000-0003-1045-3858; Kilcrease, David/0000-0002-2319-5934 FU U.S. Department of Energy by Los Alamos National Laboratory [DE-AC52-06NA25396] FX This work was performed under the auspices of the U.S. Department of Energy by Los Alamos National Laboratory under Contract No. DE-AC52-06NA25396. NR 13 TC 0 Z9 0 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 012022 DI 10.1088/1742-6596/388/1/012022 PG 7 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700022 ER PT S AU Gibson, ND Bilodeau, RC Walter, CW Hanstorp, D Aguilar, A Berrah, N Matyas, DJ Li, YG Alton, RM Lou, SE AF Gibson, N. D. Bilodeau, R. C. Walter, C. W. Hanstorp, D. Aguilar, A. Berrah, N. Matyas, D. J. Li, Y. -G. Alton, R. M. Lou, S. E. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI K-shell Photodetachment from O- SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast ID IONS AB The K-shell photodetachment spectrum of O- has been investigated using the merged ion-photon beam photodetachment technique. O- ions were produced in a Cs sputtered ion source on a new Movable Ion Photon Beamline (MIPB) while the photons were produced at the Advanced Light Source Beamline 8.0.1. Positive oxygen ions formed by multiple detachment were detected as a function of photon energy. Photoexcitation of a 1s electron leads to a short-lived Feshbach resonance similar to 3 eV below the 1s detachment threshold due to the extra stability of the now full 2p(6) shell. C1 [Gibson, N. D.; Walter, C. W.; Matyas, D. J.; Li, Y. -G.; Alton, R. M.; Lou, S. E.] Denison Univ, Dept Phys & Astron, Granville, OH 43023 USA. [Bilodeau, R. C.; Berrah, N.] Western Michigan Univ, Kalamazoo, MI USA. [Bilodeau, R. C.; Aguilar, A.] Adv Light Source, LBL, Berkeley, CA USA. [Hanstorp, D.] Univ Gothenburg, Dept Phys, Gothenburg, Sweden. RP Gibson, ND (reprint author), Denison Univ, Dept Phys & Astron, Granville, OH 43023 USA. EM gibson@denison.edu; rcbilodeau@lbl.gov OI Bilodeau, Rene/0000-0001-8607-2328 NR 5 TC 1 Z9 1 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 022102 DI 10.1088/1742-6596/388/2/022102 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700153 ER PT S AU Jiang, YH Rudenko, A Kubel, M Herrwerth, O Foucar, L Kurka, M Kuhnel, KU Senftleben, A Kling, MF Sturm, FP van Tilborg, J Belkacem, A Motomura, K Yamada, A Ueda, K Dusterer, S Treusch, R Schroter, CD Moshammer, R Ullrich, J AF Jiang, Y. H. Rudenko, A. Kuebel, M. Herrwerth, O. Foucar, L. Kurka, M. Kuehnel, K. U. Senftleben, A. Kling, M. F. Sturm, F. P. van Tilborg, J. Belkacem, A. Motomura, K. Yamada, A. Ueda, K. Duesterer, S. Treusch, R. Schroeter, C. D. Moshammer, R. Ullrich, J. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Time-resolved XUV-induced isomerization and H-3 formation in C2H4 cation SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB Using a split-mirror setup attached to a Reaction Microscope at the Free electron LASer in Hamburg (FLASH) we traced as function of time the migration of a hydrogen atom in C2H4+ from one end of the molecule to the other by coincident CH+ + CH3+ fragment detection. In addition, the observed H-3(+)+C2H+ channel provides for the first time evidence for an isomerization-induced formation mechanism of H-3(+) molecules. C1 [Jiang, Y. H.; Kurka, M.; Kuehnel, K. U.; Senftleben, A.; Schroeter, C. D.; Moshammer, R.; Ullrich, J.] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany. [Rudenko, A.; Foucar, L.] Max Planck Adv Study Grp, D-22607 Hamburg, Germany. [Kuebel, M.; Herrwerth, O.; Kling, M. F.] Max Planck Inst Quantum Opt, D-85748 Garching, Germany. [Sturm, F. P.; van Tilborg, J.; Belkacem, A.] Lawrence Berkeley Natl Lab, LBNL, Berkeley, CA 94720 USA. [Motomura, K.; Yamada, A.; Ueda, K.] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 980, Japan. [Duesterer, S.; Treusch, R.] DESY, D-22607 Hamburg, Germany. RP Jiang, YH (reprint author), Max Planck Inst Kernphys, D-69117 Heidelberg, Germany. EM yuhai.Jiang@mpi-hd.mpg.de RI Rudenko, Artem/C-7412-2009; Kling, Matthias/D-3742-2014; OI Rudenko, Artem/0000-0002-9154-8463; Kubel, Matthias/0000-0001-6065-6122 NR 3 TC 1 Z9 1 U1 0 U2 10 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 032014 DI 10.1088/1742-6596/388/3/032014 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700177 ER PT S AU Kilcoyne, ALD Aguilar, A Muller, A Schippers, S Cisneros, C Alna'Washi, G Aryal, NB Baral, KK Esteves, DA Thomas, CM Phaneuf, RA AF Kilcoyne, A. L. D. Aguilar, A. Mueller, A. Schippers, S. Cisneros, C. Alna'Washi, G. Aryal, N. B. Baral, K. K. Esteves, D. A. Thomas, C. M. Phaneuf, R. A. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Confinement resonances in photoionization of endohedral Xe@C-60(+) SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB Experimental evidence is presented for confinement resonances predicted in photoionization of the endohedral Xe@C-60(+) molecular ion at photon energies corresponding to the giant 4d resonance of Xe. C1 [Kilcoyne, A. L. D.; Aguilar, A.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, MS-7-100, Berkeley, CA 94720 USA. [Cisneros, C.] Univ Nacl Autonoma Mexico, Inst Ciencias Fisicas, Mexico City, DF, Mexico. Hashemite Univ, Zarqa 12115, Jordan. Univ Nevada, Dept Phys, Reno, NV 89557 USA. RP Kilcoyne, ALD (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, MS-7-100, Berkeley, CA 94720 USA. EM phaneuf@unr.edu RI Muller, Alfred/A-3548-2009; Kilcoyne, David/I-1465-2013; Schippers, Stefan/A-7786-2008 OI Muller, Alfred/0000-0002-0030-6929; Schippers, Stefan/0000-0002-6166-7138 NR 5 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 022003 DI 10.1088/1742-6596/388/2/022003 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700054 ER PT S AU Muller, A Schippers, S Phaneuf, RA Scully, SWJ Aguilar, A Cisneros, C Gharaibeh, MF Schlachter, AS McLaughlin, BM AF Mueller, A. Schippers, S. Phaneuf, R. A. Scully, S. W. J. Aguilar, A. Cisneros, C. Gharaibeh, M. F. Schlachter, A. S. McLaughlin, B. M. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI K-shell photoionization of Be-like B+ ions SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB Absolute cross sections for K-shell photoionization of Be-like B+ ions were measured employing the photon-ion merged-beam technique at the Advanced Light Source in Berkeley. The results are found to be in fair agreement with R-matrix calculations using L-S coupling. C1 [Mueller, A.; Schippers, S.] Univ Giessen, Inst Atom & Mol Phys, D-35392 Giessen, Germany. [Phaneuf, R. A.; Scully, S. W. J.; Aguilar, A.; Gharaibeh, M. F.] Univ Nevada, Dept Phys, Reno, NV 89557 USA. [Scully, S. W. J.; McLaughlin, B. M.] Queens Univ Belfast, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland. [Aguilar, A.; Schlachter, A. S.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Cisneros, C.] Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, Mexico. [McLaughlin, B. M.] Harvard Smithsonian Ctr Astrophys, ITAMP, Cambridge, MA 02138 USA. RP Muller, A (reprint author), Univ Giessen, Inst Atom & Mol Phys, D-35392 Giessen, Germany. EM Alfred.Mueller@iamp.physik.uni-giessen.de RI Muller, Alfred/A-3548-2009; Schippers, Stefan/A-7786-2008 OI Muller, Alfred/0000-0002-0030-6929; Schippers, Stefan/0000-0002-6166-7138 NR 4 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700152 ER PT S AU Muller, A Schippers, S Kilcoyne, ALD Aguilar, A Esteves, D Phaneuf, RA AF Mueller, A. Schippers, S. Kilcoyne, A. L. D. Aguilar, A. Esteves, D. Phaneuf, R. A. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Photoionization of singly and multiply charged tungsten ions SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB Relative cross sections for photoionization of Wq+ ions q = 1,...,5 were measured at energies up to 90 eV employing the photon-ion merged-beam technique at the Advanced Light Source in Berkeley. While the cross sections for the lower charge states are dominated by broad resonance features in the range of 4f and 5p excitations, the cross section for W5+ shows much narrower peak features. C1 [Mueller, A.; Schippers, S.] Univ Giessen, Inst Atom & Mol Phys, D-35392 Giessen, Germany. [Kilcoyne, A. L. D.; Aguilar, A.] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA. [Esteves, D.; Phaneuf, R. A.] Univ Nevada, Dept Phys, Reno, NV 89557 USA. RP Muller, A (reprint author), Univ Giessen, Inst Atom & Mol Phys, D-35392 Giessen, Germany. EM Alfred.Mueller@iamp.physik.uni-giessen.de RI Muller, Alfred/A-3548-2009; Kilcoyne, David/I-1465-2013; Schippers, Stefan/A-7786-2008 OI Muller, Alfred/0000-0002-0030-6929; Schippers, Stefan/0000-0002-6166-7138 NR 2 TC 3 Z9 3 U1 1 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 022037 DI 10.1088/1742-6596/388/2/022037 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700088 ER PT S AU Nagaya, K Iwayama, H Yase, S Sugishima, A Mizoguchi, Y Yao, M Fukuzawa, H Motomura, K Yamada, A Wang, C Liu, XJ Ueda, K Saito, N Rudenko, A Faucer, L Kurka, M Kuhnel, KU Ullrich, J Czasch, A Dorner, R Feilfel, R Piseri, P Mazza, T Devetta, M Coreno, M Belkacem, A Nagasono, M Higashiya, A Tono, K Yabashi, M Ishikawa, T Ohashi, H Kimura, H Togashi, T Senba, Y AF Nagaya, K. Iwayama, H. Yase, S. Sugishima, A. Mizoguchi, Y. Yao, M. Fukuzawa, H. Motomura, K. Yamada, A. Wang, C. Liu, X. -J. Ueda, K. Saito, N. Rudenko, A. Faucer, L. Kurka, M. Kuhnel, K. -U. Ullrich, J. Czasch, A. Dorner, R. Feilfel, R. Piseri, P. Mazza, T. Devetta, M. Coreno, M. Belkacem, A. Nagasono, M. Higashiya, A. Tono, K. Yabashi, M. Ishikawa, T. Ohashi, H. Kimura, H. Togashi, T. Senba, Y. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Multiple photoionization of rare-gas clusters by EUV-FEL at Spring-8 SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB Multiple photoionization processes of giant rare-gas clusters are investigated in the wavelength region of 51 to 61nm at Spring8. We report here some latest results of our investigation; the frustration of photoionization for giant xenon clusters and the charge transfer in Ar-core Ne-shell clusters. C1 [Nagaya, K.; Iwayama, H.; Yase, S.; Sugishima, A.; Mizoguchi, Y.; Yao, M.; Faucer, L.; Kurka, M.; Piseri, P.; Mazza, T.; Devetta, M.] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan. [Nagaya, K.; Iwayama, H.; Yase, S.; Sugishima, A.; Mizoguchi, Y.; Yao, M.; Fukuzawa, H.; Motomura, K.; Yamada, A.; Wang, C.; Liu, X. -J.; Ueda, K.; Saito, N.; Rudenko, A.; Faucer, L.; Kurka, M.; Kuhnel, K. -U.; Ullrich, J.; Feilfel, R.; Piseri, P.; Mazza, T.; Devetta, M.; Nagasono, M.; Higashiya, A.; Tono, K.; Yabashi, M.; Ishikawa, T.; Ohashi, H.; Kimura, H.; Togashi, T.] XFEL Project Head Off, RIKEN, Sayo, Hyogo 6795148, Japan. [Fukuzawa, H.; Motomura, K.; Yamada, A.; Wang, C.; Liu, X. -J.; Ueda, K.] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan. [Saito, N.] Natl Metrol Inst Japan, AIST, Tsukuba, Ibaraki 3058568, Japan. [Rudenko, A.; Faucer, L.; Ullrich, J.] Max Planck Adv Study Grp, CFEL, D-22607 Hamburg, Germany. [Faucer, L.; Czasch, A.; Dorner, R.] Goethe Univ Frankfurt, Inst Kernphys, D-60438 Frankfurt, Germany. [Kurka, M.; Kuhnel, K. -U.; Ullrich, J.] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany. [Feilfel, R.] Uppsala Univ, Dept Phys & Mat Sci, SE-75121 Uppsala, Sweden. [Piseri, P.; Mazza, T.; Devetta, M.] Univ Milano CIMAINA, Dipartimento Fis, I-20133 Milan, Italy. [Nagasono, M.] CNR IMIP, Montelibretti, I-00016 Rome, Italy. [Higashiya, A.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Ohashi, H.; Kimura, H.; Togashi, T.; Senba, Y.] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan. RP Nagaya, K (reprint author), Kyoto Univ, Dept Phys, Kyoto 6068502, Japan. EM nagaya@scphys.kyoto-u.ac.jp RI Piseri, Paolo/A-1561-2011; Devetta, Michele/C-9039-2014; OI Piseri, Paolo/0000-0001-8611-4735; Devetta, Michele/0000-0002-3806-3475; Coreno, Marcello/0000-0003-4376-808X NR 2 TC 0 Z9 0 U1 0 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 032082 DI 10.1088/1742-6596/388/3/032082 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700245 ER PT S AU Ouchi, T Sakai, K Fukuzawa, H Liu, XJ Ueda, K Higuchi, I Tamenori, Y Iwayama, H Nagaya, K Yao, M Saito, N Zhang, D Ding, D Schoffler, M Mazza, T Chiang, YC Stoychev, SD Demekhin, PV Kuleff, AI Cederbaum, LS AF Ouchi, T. Sakai, K. Fukuzawa, H. Liu, X. -J. Ueda, K. Higuchi, I. Tamenori, Y. Iwayama, H. Nagaya, K. Yao, M. Saito, N. Zhang, D. Ding, D. Schoeffler, M. Mazza, T. Chiang, Y. -C. Stoychev, S. D. Demekhin, Ph V. Kuleff, A. I. Cederbaum, L. S. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Interatomic Coulombic decay of NeAr dimers following Auger decay SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB Using momentum-resolved electron-ion multicoincidence, we have investigated interatomic Coulombic decay (ICD). We observed ICD processes in NeAr dimers following Ar LMM and Ne KLL Auger decay. From Auger final state of Ar2+(3s(-2)), we observed ICD where three electrons participate in. C1 [Ouchi, T.; Sakai, K.; Fukuzawa, H.; Liu, X. -J.; Ueda, K.; Mazza, T.] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan. [Higuchi, I.; Tamenori, Y.] Japan Synchrotron Radiat Res, Mikazuki, Hyogo 6795148, Japan. [Nagaya, K.; Yao, M.] Kyoto Univ, Grad Sch Sci, Dept Phys, Kyoto 6068502, Japan. [Saito, N.] Natl Metrol Inst Japan, Tsukuba, Ibaraki 3058568, Japan. [Zhang, D.; Ding, D.] Jilin Univ, Inst Atom & Mol Phys, Changchun 130012, Peoples R China. [Schoeffler, M.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Mazza, T.] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy. [Chiang, Y. -C.; Stoychev, S. D.; Demekhin, Ph V.; Kuleff, A. I.; Cederbaum, L. S.] Heidelberg Univ, Theoret Chem, D-69120 Heidelberg, Germany. RP Ouchi, T (reprint author), Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan. EM ueda@tagen.tohoku.ac.jp RI Schoeffler, Markus/B-6261-2008 OI Schoeffler, Markus/0000-0001-9214-6848 FU JSPS; MEXT; EU ERC; DFG FX The work was carried out with the approval of JASRI and supported in part by JSPS, MEXT, EU ERC, and DFG. NR 1 TC 0 Z9 0 U1 0 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 022041 DI 10.1088/1742-6596/388/2/022041 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700092 ER PT S AU Plesiat, E Canton, SE Bozek, JD Rude, BS Decleva, P Martin, F AF Plesiat, E. Canton, S. E. Bozek, J. D. Rude, B. S. Decleva, P. Martin, F. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Theoretical study of the vibrationally resolved photoionization cross section for the valence shells of N-2 and CO SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB Vibrationally resolved cross section for the valence shell photoionization of N-2 and CO has been accurately measured experimentally up to 300 eV. Series of ratios between two vibrational cross sections (v-ratios) are compared to theoretical results obtained from a new ab initio DFT method that includes nuclear motion. It reveals strong oscillations around the Franck-Condon factor which are the fingerprints of double-slit like interferences. To support this point, a simple model (based on the Cohen-Fano formula) will be presented at the conference. C1 [Plesiat, E.; Martin, F.] Univ Autonoma Madrid, Dept Quim, E-28049 Madrid, Spain. [Canton, S. E.] Univ Lund Lund, Dept Chem Phys, Lund, Sweden. [Decleva, P.] Univ Trieste, Dipartimento Scienze Chimiche, I-34127 Trieste, Italy. [Bozek, J. D.] Fermilab Natl Accelerator Lab, SLAC, Menlo Pk, CA 94025 USA. [Decleva, P.] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA. [Martin, F.] Inst Madrileflo Estudios Avanzados Nanociencia, Madrid 28049, Spain. RP Plesiat, E (reprint author), Univ Autonoma Madrid, Dept Quim, E-28049 Madrid, Spain. EM etienne.plesiat@uam.es RI Bozek, John/E-9260-2010; Plesiat, Etienne/M-6248-2014 OI Bozek, John/0000-0001-7486-7238; NR 2 TC 0 Z9 0 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 022033 DI 10.1088/1742-6596/388/2/022033 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700084 ER PT S AU Reinhold, CO Yoshida, S Dunning, FB AF Reinhold, C. O. Yoshida, S. Dunning, F. B. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Field-induced dissociation of Rydberg ion-pair states SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB A theoretical study is presented on the dissociation of H+..F- and K+..Cl- heavy-Rydberg ion pairs induced by a ramped electric-field, a technique used experimentally to detect and probe ion-pair states. C1 [Reinhold, C. O.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. [Yoshida, S.] Vienna Univ Technol, Inst Theoret Phys, Vienna, Austria. [Dunning, F. B.] Rice Univ, Dept Phys Astron, Houston, TX 77005 USA. RP Reinhold, CO (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. EM reinhold@ornl.gov OI Reinhold, Carlos/0000-0003-0100-4962 FU NSF; Robert A. Welch Foundation; US DoE; FWF (Austria) FX Funded by the NSF, the Robert A. Welch Foundation, the US DoE, and the FWF (Austria). NR 2 TC 1 Z9 1 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 022064 DI 10.1088/1742-6596/388/2/022064 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700115 ER PT S AU Sakai, K Ouchi, T Fukuzawa, H Ueda, K Higuchi, I Tamenori, Y Schoffler, M Mazza, T Nagaya, K Yao, M Stoychev, S Kuleff, AI Saito, N AF Sakai, K. Ouchi, T. Fukuzawa, H. Ueda, K. Higuchi, I. Tamenori, Y. Schoeffler, M. Mazza, T. Nagaya, K. Yao, M. Stoychev, S. Kuleff, A. I. Saito, N. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Interatomic Coulombic decay and electron-transfer-mediated decay following triple ionization in Ne-2, NeAr, and Ar-2 SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB We report the first observation of electron-transfer-mediated decay (ETMD) and interatomic Coulombic decay (ICD) from the triply charged states with an inner-valence vacancy, using the Ne-2, NeAr, and Ar-2. These ETMD and ICD processes are unambiguously identified by electron-ion-ion coincidence spectroscopy in which the kinetic energy of the ETMD or ICD electron and the kinetic energy release between the two fragment ions are measured in coincidence. C1 [Sakai, K.; Ouchi, T.; Fukuzawa, H.; Ueda, K.; Mazza, T.] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan. [Higuchi, I.; Tamenori, Y.] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795198, Japan. [Schoeffler, M.] Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA. [Mazza, T.] Univ Studi Milano, Cimaina & Dipartimento Fis, Milan, Italy. [Mazza, T.; Nagaya, K.] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan. [Stoychev, S.; Kuleff, A. I.] Heidelberg Univ, Theoret Chem, D-69120 Heidelberg, Germany. [Saito, N.] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan. RP Sakai, K (reprint author), Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan. EM ueda@tagen.tohoku.ac.jp RI Schoeffler, Markus/B-6261-2008 OI Schoeffler, Markus/0000-0001-9214-6848 FU JSPS; MEXT; EU ERC; DFG FX The work was carried out with the approval of JASRI and supported in part by JSPS, MEXT, EU ERC, and DFG. NR 3 TC 0 Z9 0 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 022043 DI 10.1088/1742-6596/388/2/022043 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700094 ER PT S AU Salen, P van der Meulen, P Thomas, RD Schmidt, HT Larsson, M Feifel, R Pian-Castelli, MN Fang, L Osipov, T Murphy, B Juranic, P Berrah, N Kukk, E Ueda, K Richter, R Prince, KC Bozek, JD Bostedt, C Wada, S Tashiro, M Ehara, M Tarantelli, F AF Salen, P. van der Meulen, P. Thomas, R. D. Schmidt, H. T. Larsson, M. Feifel, R. Pian-Castelli, M. N. Fang, L. Osipov, T. Murphy, B. Juranic, P. Berrah, N. Kukk, E. Ueda, K. Richter, R. Prince, K. C. Bozek, J. D. Bostedt, C. Wada, S. Tashiro, M. Ehara, M. Tarantelli, F. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI X-Ray FEL-induced Double Core-Hole Formation in Polyatomic Molecules SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB We use extremely intense, ultrashort soft X-Ray pulses generated by the LCLS X-Ray Free Electron Laser to investigate the production of molecular double core-hole states by sequential two-photon X-Ray absorption. The effect of critical LCLS parameters such as the number of photons per pulse, the pulse duration, and the focal spot size on the photoelectron and Auger spectra is modeled in detail and the results of these simulations are used as an aid in the interpretation of the experimental spectra obtained. The emphasis is on double core-hole formation in small polyatomic molecules such as CO2. C1 [Salen, P.; van der Meulen, P.; Thomas, R. D.; Schmidt, H. T.; Larsson, M.] Stockholm Univ, Dept Phys, S-10691 Stockholm, Sweden. [Feifel, R.; Pian-Castelli, M. N.] Uppsala Univ, Dept Phys & Astron, Uppsala 75120, Sweden. [Fang, L.; Osipov, T.; Murphy, B.; Juranic, P.; Berrah, N.] Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA. [Kukk, E.] Univ Turku, Dept Phys & Astron, FIN-20014 Turku, Finland. [Ueda, K.] Tohoku Univ, IMRAM, Sendai, Miyagi 9808577, Japan. [Richter, R.; Prince, K. C.] Sincrotrone Trieste, Trieste, Italy. [Bozek, J. D.; Bostedt, C.; Wada, S.] SLAC, LCLS, Menlo Pk, CA 94025 USA. [Tashiro, M.; Ehara, M.] Inst Mol Sci, Okazaki, Aichi 4448585, Japan. [Tarantelli, F.] Univ Perugia & ISTM CNR, Dept Chem, I-06123 Perugia, Italy. RP Salen, P (reprint author), Stockholm Univ, Dept Phys, S-10691 Stockholm, Sweden. EM peter.salen@physto.se RI Bozek, John/E-9260-2010; Tarantelli, Francesco/H-5798-2013; Feifel, Raimund/A-4441-2009; Schmidt, Henning/H-6277-2016; Juranic, Pavle/E-7187-2017 OI Bozek, John/0000-0001-7486-7238; RICHTER, Robert/0000-0001-8585-626X; Tarantelli, Francesco/0000-0002-1285-0606; Feifel, Raimund/0000-0001-5234-3935; Juranic, Pavle/0000-0003-4174-1924 NR 7 TC 0 Z9 0 U1 0 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 022083 DI 10.1088/1742-6596/388/2/022083 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700134 ER PT S AU Sann, H Jahnke, T Havermeier, T Kreidi, K Stuck, C Meckel, M Schoffler, MS Neumann, N Wallauer, R Voss, S Czasch, A Jagutzki, O Weber, T Schmidt-Bocking, H Miyabe, S Haxton, DJ Orel, AE Rescigno, TN Dorner, R AF Sann, H. Jahnke, T. Havermeier, T. Kreidi, K. Stuck, C. Meckel, M. Schoeffler, M. S. Neumann, N. Wallauer, R. Voss, S. Czasch, A. Jagutzki, O. Weber, Th. Schmidt-Boecking, H. Miyabe, S. Haxton, D. J. Orel, A. E. Rescigno, T. N. Doerner, R. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Electron diffraction self imaging of molecular fragmentation in two step double ionization of water SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB We doubly ionize H2O by single photon absorption at 43 eV leading to H+ + OH+. A direct double ionization and a sequential process in which single ionization is followed by rapid dissociation into a proton and an autoionizing OH* are identified. We obtain information about the internuclear distance at which the decay of the OH* occurs from the angular distribution of the autoionization electron. C1 [Sann, H.; Jahnke, T.; Havermeier, T.; Kreidi, K.; Stuck, C.; Meckel, M.; Schoeffler, M. S.; Neumann, N.; Wallauer, R.; Voss, S.; Czasch, A.; Jagutzki, O.; Weber, Th.; Schmidt-Boecking, H.; Doerner, R.] Goethe Univ Frankfurt, Inst Kernphys, Max von Lauc Str 1, D-60438 Frankfurt, Germany. [Miyabe, S.; Haxton, D. J.; Rescigno, T. N.] Lawrence Berkeley Natl Lab, Chem Sci & Ultrafast Xray Sci Lab, Berkeley, CA 94720 USA. [Orel, A. E.] Univ Calif Davis, Dept Appl Sci, Davis, CA 95616 USA. RP Sann, H (reprint author), Goethe Univ Frankfurt, Inst Kernphys, Max von Lauc Str 1, D-60438 Frankfurt, Germany. EM sann@atom.uni-frankfurt.de RI Weber, Thorsten/K-2586-2013; Schoeffler, Markus/B-6261-2008 OI Weber, Thorsten/0000-0003-3756-2704; Schoeffler, Markus/0000-0001-9214-6848 FU DEG; BMBE FX We want to thank the staff of BESSY II for experimental support. This work was funded by DEG and BMBE. NR 3 TC 0 Z9 0 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 022029 DI 10.1088/1742-6596/388/2/022029 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700080 ER PT S AU Sant'Anna, MM Schlachter, AS Ohrwall, G Stolte, WC Lindle, DW McLaughlin, BM AF Sant'Anna, M. M. Schlachter, A. S. Ohrwall, G. Stolte, W. C. Lindle, D. W. McLaughlin, B. M. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI K-shell X-ray spectroscopy of atomic nitrogen SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB Photoionization cross-section measurements for atomic nitrogen in the region of the K-edge have been made at the Advanced Light Source for the first time and are suitably reproduced by R-matrix calculations. C1 [Sant'Anna, M. M.; Schlachter, A. S.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA. [Sant'Anna, M. M.] Univ Fed Rio de Janeiro, Inst Fis, SE-22100 Lund, Sweden. [Ohrwall, G.] Lund Univ, MAX Lab, S-22100 Lund, Sweden. [Ohrwall, G.; Stolte, W. C.; Lindle, D. W.] Univ Nevada, Dept Chem, Las Vegas, NV 89154 USA. [McLaughlin, B. M.] Queens Univ Belfast, Ctr Theoret Atom Mol & Opt Phys CTAMOP, Sch Math & Phys, Belfast BT7 1NN, Antrim, North Ireland. [McLaughlin, B. M.] Harvard Smithsonian Ctr Astrophys, Inst Theoret Atom & Mol Phys ITAMP, Cambridge, MA 02138 USA. RP Sant'Anna, MM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA. EM wcstolte@lbl.gov; b.mclaughlin@qub.ac.uk RI Sant'Anna, Marcelo/B-9355-2013 OI Sant'Anna, Marcelo/0000-0001-5342-5799 NR 2 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 022007 DI 10.1088/1742-6596/388/2/022007 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700058 ER PT S AU Schoffler, MS Jahnke, T Waitz, M Trinter, F Lenz, U Stuck, C Jones, M Belkacem, A Cocke, CL Landers, A Schmidt-Bocking, H Weber, T Dorner, R AF Schoeffler, M. S. Jahnke, T. Waitz, M. Trinter, F. Lenz, U. Stuck, C. Jones, M. Belkacem, A. Cocke, C. L. Landers, A. Schmidt-Boecking, H. Weber, Th. Doerner, R. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Quasi free mechanism in single photon double ionization of Helium SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB We have kinematically complete measured photo double ionization of Helium at E-gamma=800 eV and observed recoiling ions with nearly 0 momentum that agree well with theoretical predictions of a new photo double ionization mechanism. C1 [Schoeffler, M. S.] Vienna Univ Technol, Photon Inst, A-1040 Vienna, Austria. [Schoeffler, M. S.; Belkacem, A.; Weber, Th.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Jahnke, T.; Waitz, M.; Trinter, F.; Lenz, U.; Stuck, C.; Schmidt-Boecking, H.; Doerner, R.] JK Goethe Univ Frankfurt Main, Inst Kernphys, D-60438 Frankfurt, Germany. [Jones, M.; Landers, A.] Auburn Univ, Auburn, AL 36849 USA. [Cocke, C. L.] Kansas State Univ, Manhattan, KS 66506 USA. RP Schoffler, MS (reprint author), Vienna Univ Technol, Photon Inst, A-1040 Vienna, Austria. EM markus.schoeffler@tuwien.ac.at RI Weber, Thorsten/K-2586-2013; Schoeffler, Markus/B-6261-2008 OI Weber, Thorsten/0000-0003-3756-2704; Schoeffler, Markus/0000-0001-9214-6848 NR 4 TC 0 Z9 0 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 022021 DI 10.1088/1742-6596/388/2/022021 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700072 ER PT S AU Slaughter, DS Adaniya, H Rescigno, TN Haxton, DJ McCurdy, CW Belkacem, A Larson, A Orel, AE AF Slaughter, D. S. Adaniya, H. Rescigno, T. N. Haxton, D. J. McCurdy, C. W. Belkacem, A. Larson, A. Orel, A. E. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Resonant enhanced electron impact dissociation of molecules SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast ID VIBRATIONAL-EXCITATION; ATTACHMENT; CO2 AB In the collision of electrons with molecules and molecular ions, excitation and dissociation are dominated by resonant processes, where the electron becomes temporarily trapped, changing the forces felt by the nuclei. We have carried out calculations on the resonant process leading to dissociative attachment and dissociative recombination. We separate the problem into two steps. First, the resonance parameters are obtained from accurate electron scattering calculations using the Complex Kohn variational method. Then these parameters are used as input to the dynamics calculations. We will illustrate the method with two examples, dissociative attachment in CO2 and dissociative recombination in O-2(+). C1 [Slaughter, D. S.; Adaniya, H.; Rescigno, T. N.; Haxton, D. J.; McCurdy, C. W.; Belkacem, A.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [McCurdy, C. W.] Univ Calif Davis, Dept Chem, Davis, CA 95616 USA. [Larson, A.] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden. [Orel, A. E.] Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA. RP Slaughter, DS (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM aeorel@ucdavis.edu FU US DOE; LBNL [DE-ACO205CH11231]; U.S. DOE Office of Basic Energy Sciences; Division of Chemical Sciences; Swedish Research Council; National Science Foundation [PHY-08-55092] FX This work was performed under the auspices of the US DOE by LBNL under Contract DE-ACO205CH11231 and was supported by the U.S. DOE Office of Basic Energy Sciences, Division of Chemical Sciences. A. L. acknowledges support from The Swedish Research Council and A. E. O. acknowledges support from the National Science Foundation, Grant No. PHY-08-55092. NR 15 TC 1 Z9 1 U1 0 U2 14 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 012016 DI 10.1088/1742-6596/388/1/012016 PG 8 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700016 ER PT S AU Slaughter, D Adaniya, H Osipov, T Haxton, D Weber, T Rescigno, T McCurdy, B Belkacem, A AF Slaughter, Dan Adaniya, Hidehito Osipov, Tim Haxton, Dan Weber, Thorsten Rescigno, Tom McCurdy, Bill Belkacem, Ali BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Dynamical Studies of Dissociative Electron Attachment to CO2 SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast ID DNA AB We report the results of our combined experimental and theoretical investigation on the dynamics of dissociative electron attachment to the triatomic molecule CO2. The experiments employ a 4 pi momentum spectrometer to collect kinematically complete data for this 2-body dissociation reaction. The angular dependence of the attachment entrance amplitudes, calculated by ab initio methods, connect the laboratory frame to the molecular frame. Preliminary results from our ongoing investigations of DEA to larger molecules, including formic acid and the nucleobases uracil and and thymine, will also be presented. C1 [Slaughter, Dan; Adaniya, Hidehito; Osipov, Tim; Haxton, Dan; Weber, Thorsten; Rescigno, Tom; McCurdy, Bill; Belkacem, Ali] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Slaughter, D (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. EM DSSlaughter@lbl.gov NR 5 TC 1 Z9 1 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR 052013 DI 10.1088/1742-6596/388/5/052013 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700312 ER PT S AU Trinter, F Schoffler, MS Jahnke, T Bocharova, IA Vredenborg, A Guillemin, R Sturm, FP Neumann, N Cole, K Williams, JB Simon, M Landers, A Weber, T Dorner, R AF Trinter, F. Schoeffler, M. S. Jahnke, T. Bocharova, I. A. Vredenborg, A. Guillemin, R. Sturm, F. P. Neumann, N. Cole, K. Williams, J. B. Simon, M. Landers, A. Weber, T. Doerner, R. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Double Auger Emission of fixed-in-space Carbon Monoxide following Core-Excitation and Ionization SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB Double Auger decay after core-level photo excitation and after ionization through synchrotron radiation in gas phase carbon monoxide has been studied. We report the first experiment where both Auger electrons in double Auger decay have been measured in coincidence with the ionic fragments. C1 [Trinter, F.; Jahnke, T.; Vredenborg, A.; Neumann, N.; Cole, K.; Doerner, R.] Goethe Univ Frankfurt, Inst Kernphys, D-60438 Frankfurt, Germany. [Schoeffler, M. S.; Bocharova, I. A.; Sturm, F. P.; Weber, T.] Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA USA. [Williams, J. B.; Landers, A.] Auburn Univ, Phys Dept, Auburn, AL 36849 USA. [Guillemin, R.; Simon, M.] UPMC Univ Paris 06, Laboratoire Chim Phys Matire & Rayonnement, F-75005 Paris, France. RP Trinter, F (reprint author), Goethe Univ Frankfurt, Inst Kernphys, D-60438 Frankfurt, Germany. EM trinter@atom.uni-frankfurt.de RI Weber, Thorsten/K-2586-2013; Schoeffler, Markus/B-6261-2008 OI Weber, Thorsten/0000-0003-3756-2704; Schoeffler, Markus/0000-0001-9214-6848 NR 2 TC 0 Z9 0 U1 0 U2 6 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 022066 DI 10.1088/1742-6596/388/2/022066 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700117 ER PT S AU Williams, JB Trevisan, C Schoffler, MS Jahnke, T Bocharova, IA Sturm, FP McCurdy, CW Belkacem, A Weber, T Dorner, R Landers, AL AF Williams, J. B. Trevisan, C. Schoeffler, M. S. Jahnke, T. Bocharova, I. A. Sturm, F. P. McCurdy, C. W. Belkacem, A. Weber, Th. Doerner, R. Landers, A. L. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Dissociative Photoionization of Methane at the Carbon K-edge SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB We have used soft X-ray radiation from the Advanced Light Source (ALS) in combination with Cold Target Recoil Ion Momentum Spectroscopy (COLTRIMS) to examine the correlated momenta of the photoelectron and molecular fragments arising from the dissociative photoionization of methane. In particular, we are studying (1) molecule frame photoelectron angular distributions as a stringent test of theory and (2) the interplay between electronic and nuclear dynamics through the correlated measurement of vibrationational state population and fragmentation branching ratios and kinetic energy release. C1 [Williams, J. B.; Landers, A. L.] Auburn Univ, Dept Phys, Allison Lab 206, Auburn, AL 36849 USA. [Trevisan, C.; Belkacem, A.] Calif Maritime Acad, Vallejo, CA 94590 USA. [Bocharova, I. A.; Sturm, F. P.; McCurdy, C. W.; Weber, Th.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Jahnke, T.] Inst fin Kernphysik, D-60438 Frankfurt, Germany. [Schoeffler, M. S.] Tech Univ Wien, Inst Photon, A-1040 Vienna, Austria. RP Landers, AL (reprint author), Auburn Univ, Dept Phys, Allison Lab 206, Auburn, AL 36849 USA. EM landers@physics.auburn.edu RI Weber, Thorsten/K-2586-2013; Schoeffler, Markus/B-6261-2008 OI Weber, Thorsten/0000-0003-3756-2704; Schoeffler, Markus/0000-0001-9214-6848 FU DOE-BES-AMOS; DFG; Humbolt foundation FX Work supported by DOE-BES-AMOS, DFG, and the Humbolt foundation NR 0 TC 0 Z9 0 U1 0 U2 6 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 022085 DI 10.1088/1742-6596/388/2/022085 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700136 ER PT S AU Wyker, B Ye, S Dunning, FB Yoshida, S Reinhold, CO Burgdorfer, J AF Wyker, B. Ye, S. Dunning, F. B. Yoshida, S. Reinhold, C. O. Burgdoerfer, J. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Probing and manipulating high-n near-circular Rydberg wave packets SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB Fourier transform time domain spectroscopy is used to probe the spatial distribution of near-circular Rydberg wave packets and evaluate protocols for their control and manipulation. C1 [Wyker, B.; Ye, S.; Dunning, F. B.] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA. [Yoshida, S.; Burgdoerfer, J.] Vienna Univ Technol, Inst Theoret Phys, Vienna, Austria. [Reinhold, C. O.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Wyker, B (reprint author), Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA. EM fbd@rice.edu OI Reinhold, Carlos/0000-0003-0100-4962 NR 3 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 032001 DI 10.1088/1742-6596/388/3/032001 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700164 ER PT S AU Wyker, B Ye, S Dunning, FB Yoshida, S Reinhold, CO Burgdorfer, J AF Wyker, B. Ye, S. Dunning, F. B. Yoshida, S. Reinhold, C. O. Burgdoerfer, J. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Transporting near-circular Bohr-like wave packets using chirped sine waves SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB Protocols for driving localized high-n (n similar to 300) wave packets in near-circular Bohr-like orbits to higher n states using chirped sine waves are described. C1 [Wyker, B.; Ye, S.; Dunning, F. B.] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA. [Reinhold, C. O.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. [Yoshida, S.; Burgdoerfer, J.] Vienna Univ Technol, Inst Theoret Phys, Vienna, Austria. RP Wyker, B (reprint author), Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA. EM fbd@rice.edu OI Reinhold, Carlos/0000-0003-0100-4962 FU NSF; Robert A. Welch Foundation; US DoE; FWF (Austria) FX Research supported by the NSF, the Robert A. Welch Foundation, the US DoE, and the FWF (Austria) NR 1 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 032002 DI 10.1088/1742-6596/388/3/032002 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700165 ER PT S AU Yip, FL Martin, F McCurdy, CW Rescigno, TN AF Yip, F. L. Martin, F. McCurdy, C. W. Rescigno, T. N. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Single photon double core-hole photoionization of atomic beryllium SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB Fully differential cross sections of double core hole photoionization of Be with fixed valence electrons C1 [Yip, F. L.; Martin, F.] Univ Autonoma Madrid, Dept Quim, Modulo 13, E-28049 Madrid, Spain. [Martin, F.] Inst Madrileno Estudios Avanzados Nanocienc, E-28049 Madrid, Spain. [Martin, F.; Rescigno, T. N.] Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA. [McCurdy, C. W.] Univ Calif Davis, Dept Chem, Davis, CA 95616 USA. RP Yip, FL (reprint author), Univ Autonoma Madrid, Dept Quim, Modulo 13, E-28049 Madrid, Spain. EM frank.yip@uam.es NR 2 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 022012 DI 10.1088/1742-6596/388/2/022012 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700063 ER PT S AU Yoshida, S Reinhold, CO Burgdorfer, J Wyker, B Ye, S Dunning, FB AF Yoshida, S. Reinhold, C. O. Burgdoerfer, J. Wyker, B. Ye, S. Dunning, F. B. BE Williams, ID VanDerHart, HW McCann, JF Crothers, DSF TI Decoherence of high-n, high-l Rydberg wave packets by electrical noise and collisions SO XXVII INTERNATIONAL CONFERENCE ON PHOTONIC, ELECTRONIC AND ATOMIC COLLISIONS (ICPEAC 2011), PTS 1-15 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 27th International Conference on Photonic, Electronic and Atomic Collisions (ICPEAC) CY JUL 27-AUG 02, 2011 CL Queens Univ Belfast, Belfast, NORTH IRELAND SP Andor Technol, Belfast City Council, Belfast Visitor & Convent Bur, Coherent, CVI Melles Griot, Dell, Int Union Pure & Appl Phys (IUPAP), Invest No Ireland, Laserlines, UK Cold Atoms/Condensed Matter Network (EPSRC), Phys Review Letters & Phys Review A, Quantemol, Springer, Great Britain Sasakawa Fdn, IoP Publishing - Journal Phys B: Atom, Mol & Opt Phys, IoP Publishing - Journal Phys: Conf Series HO Queens Univ Belfast AB Quantum revivals in high-n (n similar to 300) high-l Rydberg wave packets are used to examine decoherence induced by application of "colored" electrical noise and by collisions. C1 [Yoshida, S.; Burgdoerfer, J.] Vienna Univ Technol, Inst Theoret Phys, A-1040 Vienna, Austria. [Reinhold, C. O.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. [Wyker, B.; Ye, S.; Dunning, F. B.] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA. RP Yoshida, S (reprint author), Vienna Univ Technol, Inst Theoret Phys, A-1040 Vienna, Austria. EM fbd@rice.edu OI Reinhold, Carlos/0000-0003-0100-4962 FU NSF; Robert A. Welch Foundation; US DoE; FWF (Austria) FX Funded by the NSF, the Robert A. Welch Foundation, the US DoE, and the FWF (Austria). NR 1 TC 0 Z9 0 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 388 AR UNSP 032003 DI 10.1088/1742-6596/388/3/032003 PG 1 WC Physics, Atomic, Molecular & Chemical; Physics, Multidisciplinary SC Physics GA BDU81 UT WOS:000314994700166 ER PT B AU Navid, A Almaas, E AF Navid, Ali Almaas, Eivind BE Carniel, E Hinnebusch, BJ TI Yersinia pestis Metabolic Network SO YERSINIA: SYSTEMS BIOLOGY AND CONTROL LA English DT Article; Book Chapter ID LOW-CALCIUM-RESPONSE; COMPLETE GENOME SEQUENCE; VIRULENCE-ASSOCIATED PLASMIDS; EARLY-PHASE TRANSMISSION; OUTER-MEMBRANE PROTEINS; PASTEURELLA-PESTIS; ESCHERICHIA-COLI; MYCOBACTERIUM-TUBERCULOSIS; PLASMINOGEN-ACTIVATOR; SACCHAROMYCES-CEREVISIAE AB Bubonic plague is one of the deadliest diseases known to man. Unfortunately, despite all of our medical advances, we still do not have a working vaccine against this disease. Worse yet, discovery of antimicrobial-resistant strains of Yersinia pestis, the causative agent of plague, could soon render our current therapeutic means ineffective. Unique characteristics of bacterial metabolism constitute one of the primary sets of targets for drug design. Accordingly, metabolism of Y. pestis has been one of the most studied aspects of its physiology. In this chapter we aim to provide a summary report of the current knowledge about the important metabolic networks of Y. pestis. We report on the evolutionary downsizing of Y. pestis metabolism as it adapted to environments and modes of transmission that are different from that of its progenitor. We detail the known changes in Y. pestis metabolism as it transitions between different stations of its lifecycle. We describe the role of metabolism in bacterial virulence. Finally, we report the results of system-level analyses of Y. pestis that use the available genomic and transcriptomic data to assess the organism's response to various genetic and environmental perturbations. C1 [Navid, Ali] Lawrence Livermore Natl Lab, Biosci & Biotechnol Div, Livermore, CA 94550 USA. [Almaas, Eivind] Norwegian Univ Sci & Technol, Dept Biotechnol, N-7034 Trondheim, Norway. RP Navid, A (reprint author), Lawrence Livermore Natl Lab, Biosci & Biotechnol Div, Livermore, CA 94550 USA. EM navid1@llnl.gov; Eivind.almaas@ntnu.no NR 162 TC 0 Z9 0 U1 0 U2 4 PU CAISTER ACADEMIC PRESS PI WYMONDHAM PA 32 HEWITTS LANE, WYMONDHAM NR 18 0JA, ENGLAND BN 978-1-908230-05-8 PY 2012 BP 83 EP 107 PG 25 WC Infectious Diseases SC Infectious Diseases GA BDO15 UT WOS:000314140400007 ER PT J AU Willert, J Kelley, CT Knoll, DA Dong, H Ravishankar, M Sathre, P Sullivan, M Taitano, W AF Willert, Jeff Kelley, C. T. Knoll, D. A. Dong, Han Ravishankar, Mahesh Sathre, Paul Sullivan, Michael Taitano, William BE Guo, Q Douglas, C TI Hybrid Deterministic/Monte Carlo Neutronics using GPU Accelerators SO 2012 11TH INTERNATIONAL SYMPOSIUM ON DISTRIBUTED COMPUTING AND APPLICATIONS TO BUSINESS, ENGINEERING & SCIENCE (DCABES) LA English DT Proceedings Paper CT 11th International Symposium on Distributed Computing and Applications to Business, Engineering and Science (DCABES) CY OCT 19-22, 2012 CL Guilin, PEOPLES R CHINA DE Neutron Transport; Jacobian-Free Newton-Krylov; GPU; Monte Carlo AB In this paper we discuss a GPU implementation of a hybrid deterministic/Monte Carlo method for the solution of the neutron transport equation. The key feature is using GPUs to perform a Monte Carlo transport sweep as part of the evaluation of the nonlinear residual and Jacobian-vector product. We describe the algorithm and present some preliminary numerical results which illustrate the effectiveness of the GPU Monte Carlo sweeps. C1 [Willert, Jeff; Kelley, C. T.] North Carolina State Univ, Dept Math, Box 8205, Raleigh, NC 27695 USA. [Knoll, D. A.] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. [Dong, Han] Univ Maryland Baltimore Cty, Comp Sci & Elect Engn Dept, Baltimore, MD 21250 USA. [Ravishankar, Mahesh] Ohio State Univ, Dept Comp Sci & Engn, Columbus, OH 43210 USA. [Sathre, Paul] Virginia Tech Univ, Dept Comp Sci, Blacksburg, VA 24060 USA. [Sullivan, Michael] Univ Texas, Sch Elect & Comp Engn, Austin, TX 78712 USA. [Sullivan, Michael] Univ New Mexico, Chem & Nucl Engn Dept, Albuquerque, NM 87131 USA. RP Willert, J (reprint author), North Carolina State Univ, Dept Math, Box 8205, Raleigh, NC 27695 USA. EM jawiller@ncsu.edu; tim_kelley@ncsu.edu; nol@lanl.gov; han6@umbc.edu; ravishan@cse.ohio-state.edu; sath6220@cs.vt.edu; mbsullivan@utexas.edu; taitae25@unm.edu FU Consortium for Advanced Simulation of Light Water Reactors [DE-AC05-00OR22725]; Los Alamos National Laboratory [172092-1] FX This work was been partially supported by the Consortium for Advanced Simulation of Light Water Reactors (www.casl.gov), an Energy Innovation Hub (http:// www. energy. gov/ hubs) for Modeling and Simulation of Nuclear Reactors under U. S. Department of Energy Contract No. DE- AC05- 00OR22725 and Los Alamos National Laboratory contract No. 172092-1. NR 15 TC 2 Z9 2 U1 0 U2 2 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA BN 978-0-7695-4818-0 PY 2012 BP 43 EP 47 DI 10.1109/DCABES.2012.37 PG 5 WC Computer Science, Hardware & Architecture; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BDS18 UT WOS:000314663600011 ER PT B AU Nekoogar, F Dowla, F AF Nekoogar, Faranak Dowla, Farid GP IEEE TI Next Generation RFID Using Ultra-wideband Signaling SO 2012 IEEE INTERNATIONAL CONFERENCE ON WIRELESS INFORMATION TECHNOLOGY AND SYSTEMS (ICWITS) LA English DT Proceedings Paper CT IEEE International Conference on Wireless Information Technology and Systems (ICWITS) CY NOV 11-16, 2012 CL Maui, HI SP IEEE, IEEE Antennas & Propagat Soc, IEEE Commun Soc, IEEE Microwave Theory & Techniques Soc (IEEE MTT-S), Agilent Technologies, Natl Sci Fdn (NSF), Anritsu C1 [Nekoogar, Faranak; Dowla, Farid] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Nekoogar, F (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. EM nekoogar1@llnl.gov; dowla1@llnl.gov NR 4 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 978-1-4673-0947-9; 978-1-4673-0946-2 PY 2012 PG 4 WC Computer Science, Theory & Methods; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BDT38 UT WOS:000314775300049 ER PT S AU Abdelaziz, O Shen, B AF Abdelaziz, Omar Shen, Bo GP ASHRAE TI Cold Climates Heat Pump Design Optimization SO ASHRAE TRANSACTIONS 2012, VOL 118, PT 1 SE ASHRAE Transactions LA English DT Proceedings Paper CT ASHRAE Winter Conference CY 2012 CL Chicago, IL SP ASHRAE ID REFRIGERANT AB Heat pumps provide an efficient heating method; however they suffer from sever capacity and performance degradation at low ambient conditions. This has deterred market penetration in cold climates. There is a continuing effort to find an efficient air source cold climate heat pump that maintains acceptable capacity and performance at low ambient conditions. Systematic optimization techniques provide a reliable approach for the design of such systems. This paper presents a step-by-step approach for the design optimization of cold climate heat pumps. We first start by describing the optimization problem: objective function, constraints, and design space. Then we illustrate how to perform this design optimization using an open source publically available optimization toolbox. The response of the heat pump design was evaluated using a validated component based vapor compression model. This model was treated as a black box model within the optimization framework. Optimum designs for different system configurations are presented. These optimum results were further analyzed to understand the performance tradeoff and selection criteria. The paper ends with a discussion on the use of systematic optimization for the cold climate heat pump design. C1 [Abdelaziz, Omar; Shen, Bo] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Abdelaziz, O (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RI Abdelaziz, Omar/O-9542-2015 OI Abdelaziz, Omar/0000-0002-4418-0125 NR 20 TC 4 Z9 4 U1 0 U2 4 PU AMER SOC HEATING, REFRIGERATING AND AIR-CONDITIONING ENGS PI ATLANTA PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 USA SN 0001-2505 J9 ASHRAE TRAN PY 2012 VL 118 BP 34 EP 41 PN 1 PG 8 WC Thermodynamics; Construction & Building Technology SC Thermodynamics; Construction & Building Technology GA BDC57 UT WOS:000312640000005 ER PT S AU Athalye, R Xie, YL Liu, B Baechler, M AF Athalye, Rahul Xie, Yulong Liu, Bing Baechler, Michael GP ASHRAE TI A Case Study: Using Integrated Approach to Design a Net-Zero Bank Branch SO ASHRAE TRANSACTIONS 2012, VOL 118, PT 1 SE ASHRAE Transactions LA English DT Proceedings Paper CT ASHRAE Winter Conference CY 2012 CL Chicago, IL SP ASHRAE AB This paper describes a real life project conducted by the Pacific Northwest National Laboratory (PNNL) and PNC Financial Services Group's design team. This is a demonstration project supported by the US. Department of Energy's Commercial Partnerships Program. The goal of this project is to design and construct a net-zero energy bank branch in Fort Lauderdale, Florida. The integrated design involved two steps, 1) achieve 50% better energy performance than comparable baseline building, i.e., ANSI/ASHRAE/IESNA Standard 90.1-2004, using the optimized energy efficiency measures (EEMs), 2) then use renewable to cover the remaining energy loads. The lessons learned from this process will be used in the development of all future PNC Branches in the United States. At the concept design phase, the EnergyPlus models were developed to evaluate the EEMs and optimize the design package in terms of energy savings and cost-effectiveness. Despite a comprehensive EEM package, the total energy reduction was only 27% over the baseline. This result turned the team's attention back to PNNL's metering analysis, which revealed that over 50% of energy consumption in a similar branch was contributed from decorative lighting and plug loads. This metering study also revealed a substantial amount of base load existed during business off-hours. Another set of EEMs were proposed to tackle the newly found sources of energy consumption. Exterior lighting was reduced by using LED fixtures for site lighting, signage and decorative lights, and plug loads were reduced by combining ENERGY STAR equipment with off-hours turn off of major equipment. PNC showed great commitment by actively engaging their IT department. The collaboration efforts made it possible to find a solution to tackle the plug loads and save additional 16,000 kWh of electricity. With these changes, the total building energy consumption dropped to 56% of the baseline building consumption, exceeding the target. This paper presents how metering data was used to calibrate models and apply the calibrated modeling analysis results to guide the design team throughout the project design phases. The case study showed the importance of metering and studying the actual energy end use distribution in a building. It also served as a showcase for what is possible when there is commitment from the client and great rapport between design teams. C1 [Athalye, Rahul; Xie, Yulong; Liu, Bing; Baechler, Michael] Pacific NW Natl Lab, Richland, WA 99352 USA. RP Athalye, R (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. RI Xie, Yulong/O-9322-2016 OI Xie, Yulong/0000-0001-5579-482X NR 2 TC 0 Z9 0 U1 1 U2 3 PU AMER SOC HEATING, REFRIGERATING AND AIR-CONDITIONING ENGS PI ATLANTA PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 USA SN 0001-2505 J9 ASHRAE TRAN PY 2012 VL 118 BP 183 EP 190 PN 1 PG 8 WC Thermodynamics; Construction & Building Technology SC Thermodynamics; Construction & Building Technology GA BDC57 UT WOS:000312640000023 ER PT S AU Arena, LB Butcher, TA Zoeller, WA Shapiro, CR AF Arena, Lois B. Butcher, Thomas A. Zoeller, William A. Shapiro, Carl R. GP ASHRAE TI In-Field Performance of Condensing Boilers SO ASHRAE TRANSACTIONS 2012, VOL 118, PT 1 SE ASHRAE Transactions LA English DT Proceedings Paper CT ASHRAE Winter Conference CY 2012 CL Chicago, IL SP ASHRAE AB High-efficiency, condensing boilers have been available in the U.S. since the 1990s and are now common in the residential market, but in many instances are not achieving consistent condensing performance levels due to high return water temperatures. This is particularly true with hydronic baseboard heating systems and their traditional sizing and design methods. In high performance, low-load homes, a change in the baseboard sizing and overall system configuration is warranted. In response to this need, Steven Winter Associates, Inc. (SWA) teamed with the Department of Energy's Building America Program, the New York State Energy Research and Development Authority (NYSERDA), Ithaca Neighborhood Housing Services (INHS), and Brookhaven National Laboratory (BNL) to evaluate the performance of condensing boilers using baseboard convector delivery systems. Specific objectives included: I) evaluate and define the optimal operating parameters of the condensing-boiler/hot-water baseboard combination; 2)- evaluate and define the optimal operating parameters of the condensing boiler/indirect domestic hot water combination; 3) test those findings in real-world residential settings; and 4) document those parameters in a technically accurate, installer friendly manner. This research identified several issues affecting: I) the installed performance of condensing boilers when combined with baseboard convector; 2) the comfort of the occupant; and 3) the longevity of the equipment. This presentation outlines the test protocol used for evaluating system performance in three homes in the cold climate region, key findings from over one year of data collection, suggestions for improving installed efficiency, and continuing research needs to overcome market barriers. C1 [Arena, Lois B.; Zoeller, William A.; Shapiro, Carl R.] Steven Winter Associates, Norwalk, CT 06854 USA. [Butcher, Thomas A.] Brookhaven Natl Lab, Upton, NY USA. RP Arena, LB (reprint author), Steven Winter Associates, Norwalk, CT 06854 USA. NR 19 TC 2 Z9 2 U1 0 U2 3 PU AMER SOC HEATING, REFRIGERATING AND AIR-CONDITIONING ENGS PI ATLANTA PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 USA SN 0001-2505 J9 ASHRAE TRAN PY 2012 VL 118 BP 359 EP 366 PN 1 PG 8 WC Thermodynamics; Construction & Building Technology SC Thermodynamics; Construction & Building Technology GA BDC57 UT WOS:000312640000045 ER PT S AU Shen, B Rice, CK AF Shen, Bo Rice, C. Keith GP ASHRAE TI Multiple-Zone Variable Refrigerant Flow System Modeling and Equipment Performance Mapping SO ASHRAE TRANSACTIONS 2012, VOL 118, PT 1 SE ASHRAE Transactions LA English DT Proceedings Paper CT ASHRAE Winter Conference CY 2012 CL Chicago, IL SP ASHRAE AB We developed a variable refrigerant flow (VRF), vapor compression, system model, which has five indoor units, one outdoor unit and one water heater. The VRF system can run simultaneous space conditioning (cooling or heating) and water heating. The indoor units and outdoor unit use fin-&-tube coil heat exchangers, and the water heater uses a tube-in-tube heat exchanger. The fin-&-tube coil heat exchangers are modeled using a segment-by-segment approach, and the tube-in-tube water heater is modeled using a phase-by-phase approach. The compressor used is a variable-speed rotary design. We calibrated our model against a manufacturer's product literature. Based on the vapor compression system model, we investigated the methodology for generating VRF equipment performance maps, which can be used for energy simulations in TRNSYS and EnergyPlus, etc, In the study, the major independent variables for mapping are identified, and the deviations between the simplified performance map and the actual equipment system simulation are quantified. C1 [Shen, Bo; Rice, C. Keith] Oak Ridge Natl Lab, Bldg Technol Res & Integrat Ctr, Bldg Equipment Res Grp, Oak Ridge, TN 37831 USA. RP Shen, B (reprint author), Oak Ridge Natl Lab, Bldg Technol Res & Integrat Ctr, Bldg Equipment Res Grp, Oak Ridge, TN 37831 USA. NR 4 TC 4 Z9 4 U1 0 U2 2 PU AMER SOC HEATING, REFRIGERATING AND AIR-CONDITIONING ENGS PI ATLANTA PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 USA SN 0001-2505 J9 ASHRAE TRAN PY 2012 VL 118 BP 420 EP 427 PN 1 PG 8 WC Thermodynamics; Construction & Building Technology SC Thermodynamics; Construction & Building Technology GA BDC57 UT WOS:000312640000053 ER PT S AU Hudon, K Sparn, B Christensen, D Maguire, J AF Hudon, Kate Sparn, Bethany Christensen, Dane Maguire, Jeff GP ASHRAE TI Heat Pump Water Heater Technology Assessment Based on Laboratory Research and Energy Simulation Models SO ASHRAE TRANSACTIONS 2012, VOL 118, PT 1 SE ASHRAE Transactions LA English DT Proceedings Paper CT ASHRAE Winter Conference CY 2012 CL Chicago, IL SP ASHRAE AB This paper explores the laboratory performance of five integrated Heat Pump Water Heaters (HPWHs) across a wide range of operating conditions representative of US climate regions. Laboratory results demonstrate the efficiency of this technology under most of the conditions tested and show that differences in control schemes and design features impact the performance of the individual units. These results were used to understand current model limitations, and then to bracket the energy savings potential for HPWH technology in various US climate regions. Simulation results show that HPWHs are expected to provide significant energy savings in many climate zones when compared to other types of water heaters (up to 64%, including impact on HVAC systems). C1 [Hudon, Kate; Sparn, Bethany; Christensen, Dane; Maguire, Jeff] Natl Renewable Energy Lab, Residential Bldg Res Grp, Golden, CO USA. RP Hudon, K (reprint author), Natl Renewable Energy Lab, Residential Bldg Res Grp, Golden, CO USA. NR 26 TC 0 Z9 1 U1 0 U2 3 PU AMER SOC HEATING, REFRIGERATING AND AIR-CONDITIONING ENGS PI ATLANTA PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 USA SN 0001-2505 J9 ASHRAE TRAN PY 2012 VL 118 BP 683 EP 704 PN 1 PG 22 WC Thermodynamics; Construction & Building Technology SC Thermodynamics; Construction & Building Technology GA BDC57 UT WOS:000312640000086 ER PT S AU Deru, M Langner, R Zhivov, A Liesen, R Herron, D Smith, V AF Deru, Michael Langner, Rois Zhivov, Alexander Liesen, Richard Herron, Dale Smith, Vernon GP ASHRAE TI Extremely Low-Energy Design for Army Buildings: Dining Facility SO ASHRAE TRANSACTIONS 2012, VOL 118, PT 1 SE ASHRAE Transactions LA English DT Proceedings Paper CT ASHRAE Winter Conference CY 2012 CL Chicago, IL SP ASHRAE AB The U. S. Army Corps of Engineers, in collaboration with the U. S. Department of Energy's (DOE) National Renewable Energy Laboratory (NREL), academia, and private sector subject matter experts, recently completed an energy study to evaluate potential site and source energy-use reduction in new Army buildings. The study was completed in response to the mandates for energy savings in federal buildings enacted by the U. S. Energy Independence and Security Act of 2007 (U. S. Congress 2007). The building types studied included an Unaccompanied Enlisted Personnel Housing (UEPH or barracks), a brigade headquarters (administrative building), a company operation facility, a maintenance facility, and a dining facility (DFAC). The study was conducted for representative locations in all 15 DOE identified climate zones in the United States with building designs adapted to these climatic conditions. This paper presents the results of the energy analysis for a typical Army dining facility. It discusses energy efficiency measures and combinations used to reduce both internal and external loads on the building and overall energy use. The largest load in a DFAC is the cooking, and the currently available best-in-class kitchen equipment is included in the final design. The potential site energy savings compared to the energy code range from 21% to 38%. The potential source energy savings compared to Commercial Building Energy Consumption Survey ranges from 37% to 42%. Additional savings may be obtained if an efficient cogeneration system is used and the building is considered as apart of the building cluster or community to fully utilize the energy from the cogeneration system. C1 [Deru, Michael; Langner, Rois] Natl Renewable Energy Lab, Commercial Bldg Res Grp, Golden, CO 80401 USA. [Zhivov, Alexander; Liesen, Richard; Herron, Dale] US Army, ERDC, CERL, Champaign, IL USA. RP Deru, M (reprint author), Natl Renewable Energy Lab, Commercial Bldg Res Grp, Golden, CO 80401 USA. FU U.S. Army Corps of Engineers Headquarters under leadership of Daniel Carpio and in collaboration with the ACE Construction Engineering Research Laboratory and the National Renewable Energy Laboratory. FX This study was conducted by the U.S. Army Corps of Engineers Headquarters under leadership of Daniel Carpio and in collaboration with the ACE Construction Engineering Research Laboratory and the National Renewable Energy Laboratory. NR 17 TC 0 Z9 0 U1 0 U2 0 PU AMER SOC HEATING, REFRIGERATING AND AIR-CONDITIONING ENGS PI ATLANTA PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 USA SN 0001-2505 J9 ASHRAE TRAN PY 2012 VL 118 BP 790 EP 815 PN 1 PG 26 WC Thermodynamics; Construction & Building Technology SC Thermodynamics; Construction & Building Technology GA BDC57 UT WOS:000312640000092 ER PT S AU Langner, R Deru, M Zhivov, A Liesen, R Herron, D AF Langner, Rois Deru, Michael Zhivov, Alexander Liesen, Richard Herron, Dale GP ASHRAE TI Extremely Low-Energy Design for Army Buildings: Tactical Equipment Maintenance Facility SO ASHRAE TRANSACTIONS 2012, VOL 118, PT 1 SE ASHRAE Transactions LA English DT Proceedings Paper CT ASHRAE Winter Conference CY 2012 CL Chicago, IL SP ASHRAE AB The U. S. Army Corps of Engineers Headquarters, the U. S. Army Corps of Engineers Construction Energy Research Laboratory (CERL), and the National Renewable Energy Laboratory (NREL) worked together to explore the potential to reach the 2015 energy performance goal of the Energy Independence and Security Act of 2007: to reduce fossil fuel-generated energy consumption by 65% for five common military construction building types (U. S. Congress 2007). This report covers the analysis, approach, and results examining energy performance for the Army tactical equipment maintenance facility. Starting with a previous project by CERL and NREL that explored 30% energy savings for the Energy Policy Act of 2005 (U. S. Congress 2005), the current project was able to achieve 40%-63% site energy savings (depending on climate zone) compared to a baseline building model, and 51%-76% source energy savings compared to Commercial Buildings Energy Consumption Survey 2003 (EIA 2008) data for a similar building type. Recommended energy efficiency measures include passive house insulation standards, demand control ventilation strategies in the maintenance repair bays, radiant floor heating, transpired solar collectors, reduced lighting power densities, daylighting, and lighting control strategies. C1 [Langner, Rois; Deru, Michael] Natl Renewable Energy Lab, Commercial Bldg Res Grp, Golden, CO 80401 USA. [Zhivov, Alexander; Liesen, Richard; Herron, Dale] US Army, Army Engn Res & Dev Ctr, Energy Branch, Construct Engn Res Lab, Champaign, IL USA. RP Langner, R (reprint author), Natl Renewable Energy Lab, Commercial Bldg Res Grp, Golden, CO 80401 USA. NR 19 TC 0 Z9 0 U1 0 U2 4 PU AMER SOC HEATING, REFRIGERATING AND AIR-CONDITIONING ENGS PI ATLANTA PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 USA SN 0001-2505 J9 ASHRAE TRAN PY 2012 VL 118 BP 816 EP 830 PN 1 PG 15 WC Thermodynamics; Construction & Building Technology SC Thermodynamics; Construction & Building Technology GA BDC57 UT WOS:000312640000093 ER PT S AU Lutz, JD AF Lutz, James D. GP ASHRAE TI Water and Energy Wasted During Residential Shower Events: Findings from a Pilot Field Study of Hot-Water Distribution Systems SO ASHRAE TRANSACTIONS 2012, VOL 118, PT 1 SE ASHRAE Transactions LA English DT Proceedings Paper CT ASHRAE Winter Conference CY 2012 CL Chicago, IL SP ASHRAE AB Heating water is one of the most energy-consumptive activities in a household, accounting for about 49% of California's residential natural gas consumption (Palmgren et al. 2010). Data collected during a pilot field study in California indicate that significant amounts of water and energy are wasted while waiting for hot water to be delivered to the point of end use. We calculate the water and energy wasted during shower events from data collected using a wireless sensor network that monitored water flows and temperatures in three single-family residences. The total calculated water waste for a typical shower event was 30%. 41% of the hot-water energy for the same event was wasted. This relatively low efficiency highlights the importance of examining further the energy and water waste of residential hot water distribution systems in order to improve them. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. RP Lutz, JD (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. NR 10 TC 0 Z9 0 U1 0 U2 4 PU AMER SOC HEATING, REFRIGERATING AND AIR-CONDITIONING ENGS PI ATLANTA PA 1791 TULLIE CIRCLE NE, ATLANTA, GA 30329 USA SN 0001-2505 J9 ASHRAE TRAN PY 2012 VL 118 BP 890 EP 900 PN 1 PG 11 WC Thermodynamics; Construction & Building Technology SC Thermodynamics; Construction & Building Technology GA BDC57 UT WOS:000312640000098 ER PT B AU Neilsen, EH AF Neilsen, Eric H., Jr. BE Ballester, P Egret, D Lorente, NPF TI Prediction of Observing Conditions for DES Exposure Scheduling SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS XXI SE Astronomical Society of the Pacific Conference Series LA English DT Proceedings Paper CT 21st Annual Conference on Astronomical Data Analysis Software and Systems CY NOV 06-10, 2011 CL Observ Paris, Paris, FRANCE SP European So Observ HO Observ Paris AB Delivered sky brightness and atmospheric seeing are two important factors in the optimal scheduling of observations in large observing programs, but are less well studied than spherical astronomy. In the Dark Energy Survey (DES), planning software needs to optimize over the requirements of each of its science programs. For example, observing cadence is the primary factor in supernova detection, whereas seeing is the most important factor in weak lensing measurements. Delivered sky brightness is an important factor in filter and field selection for all programs. I describe models for the short timescale (5 minute) evolution of seeing and delivered sky brightness, and parametrize and test these models using data from CTIO and Apache Point Observatory. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Neilsen, EH (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 6 TC 3 Z9 2 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA BN 978-1-58381-804-6 J9 ASTR SOC P PY 2012 VL 461 BP 201 EP 204 PG 4 WC Astronomy & Astrophysics; Computer Science, Interdisciplinary Applications SC Astronomy & Astrophysics; Computer Science GA BDT65 UT WOS:000314795700038 ER PT B AU Bolton, AS Bailey, S Brownstein, J Pandey, P Schlege, D Shu, YP AF Bolton, Adam S. Bailey, Stephen Brownstein, Joel Pandey, Parul Schlege, David Shu, Yiping BE Ballester, P Egret, D Lorente, NPF TI What is a Spectrum? SO ASTRONOMICAL DATA ANALYSIS SOFTWARE AND SYSTEMS XXI SE Astronomical Society of the Pacific Conference Series LA English DT Proceedings Paper CT 21st Annual Conference on Astronomical Data Analysis Software and Systems CY NOV 06-10, 2011 CL Observ Paris, Paris, FRANCE SP European So Observ HO Observ Paris ID SPECTROSCOPY; EXTRACTION AB This contribution describes the "spectro-perfectionism" algorithm of Bolton & Schlegel (2010) that is being implemented within the Baryon Oscillation Spectroscopic Survey (BOSS) of the Sloan Digital Sky Survey III (SDSS-III), in terms of its potential to deliver Poisson-limited sky subtraction and lossless compression of the input likelihood functional given raw CCD data. C1 [Bolton, Adam S.; Brownstein, Joel; Pandey, Parul; Shu, Yiping] Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA. [Bailey, Stephen; Schlege, David] Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA USA. RP Bolton, AS (reprint author), Univ Utah, Dept Phys & Astron, Salt Lake City, UT 84112 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU ASTRONOMICAL SOC PACIFIC PI SAN FRANCISCO PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA BN 978-1-58381-804-6 J9 ASTR SOC P PY 2012 VL 461 BP 509 EP + PG 2 WC Astronomy & Astrophysics; Computer Science, Interdisciplinary Applications SC Astronomy & Astrophysics; Computer Science GA BDT65 UT WOS:000314795700108 ER PT J AU Meijer, M Somers, B Johnson, J Naber, J Lee, SY Malbec, LM Bruneaux, G Pickett, LM Bardi, M Payri, R Bazyn, T AF Meijer, Maarten Somers, Bart Johnson, Jaclyn Naber, Jeffrey Lee, Seong-Young Malbec, Louis Marie Bruneaux, Gilles Pickett, Lyle M. Bardi, Michele Payri, Raul Bazyn, Tim TI ENGINE COMBUSTION NETWORK (ECN): CHARACTERIZATION AND COMPARISON OF BOUNDARY CONDITIONS FOR DIFFERENT COMBUSTION VESSELS SO ATOMIZATION AND SPRAYS LA English DT Article DE diesel; sprays; combustion; combustion vessels; experimental methodologies; boundary conditions; temperature characterization; spray modeling; TSL ID FREQUENCY-RESPONSE; TEMPERATURE AB The Engine Combustion Network (ECN) is a worldwide group of institutions using combustion vessels and/or performing computational fluid dynamics (CFD) simulation, whose aim is to advance the state of spray and combustion knowledge at engine-relevant conditions. A key activity is the use of spray chamber facilities that operate at high-temperature, high-pressure conditions typical of diesel combustion, which are operated at specific target conditions in order to leverage research capabilities and advanced diagnostics of all ECN participants. The first target condition, called "Spray A," has been defined with detailed ambient (900 K, 60 bar, 22.8 kg/m(3), 15% oxygen) and injector (common rail, 1500 bar, KS1.5/86 nozzle, 0.090-mm orifice diameter, n-dodecane, 363 K) conditions. Establishing and improving these experimental boundary conditions in unique facilities throughout the world represents a major step forward in the establishment of high-quality, quantitative data sets for engine spray combustion. This paper is a review of the methodology to characterize and control the ambient and fuel-injector boundary conditions (e.g., temperature, pressure, composition) as offered by six different participating institutions of the ECN, each targeting the Spray A conditions and quantifying experimental uncertainty. Constant-pressure flow (CPF) and constant-volume preburn (CVP) chambers with various ambient gas composition are compared for the first time. Experimental diagnostics include the use of fast-response, radiation-corrected thermocouples for spatially resolved gas and fuel-injector temperature, laser-induced phosphorescence for surface temperature, and high-speed transducers for pressure. With guidance about the uncertainty and variation that exists between facilities, simplified models are then employed to understand how these boundary condition variations may affect aspects of spray combustion. Ambient gas and fuel temperature effects on liquid- and vapor-phase penetration are examined with established one-dimensional models. Chemical kinetics modeling in single- or multi-zone reactors is used to predict the influence of different preburn environments on the major and minor species present in the ambient gas at the start of injection, and their subsequent effect on spray ignition. This review article provides recognition of the challenge in creating well-controlled high-temperature, high-pressure environments, and identifies which boundary condition variations are expected to have the highest impact on spray combustion. C1 [Meijer, Maarten; Somers, Bart] TU E, Eindhoven, Netherlands. [Malbec, Louis Marie; Bruneaux, Gilles] IFP Energies Nouvelles, F-92852 Rueil Malmaison, France. [Pickett, Lyle M.] Sandia Natl Labs, Livermore, CA 94550 USA. [Bardi, Michele; Payri, Raul] Univ Politecn Valencia, CMT Motores Term, E-46071 Valencia, Spain. [Bazyn, Tim] Caterpillar Inc, Peoria, IL USA. RP Meijer, M (reprint author), TU E, Eindhoven, Netherlands. EM M.Meijer@tue.nl RI Somers, Bart/I-4833-2013; Payri, Raul/B-3662-2009; Moteur, Direction TAE/C-1458-2013; IFPEN, Publications/A-8028-2008 OI Somers, Bart/0000-0003-2969-6745; Payri, Raul/0000-0001-7428-5510; NR 24 TC 40 Z9 40 U1 3 U2 24 PU BEGELL HOUSE INC PI REDDING PA 50 CROSS HIGHWAY, REDDING, CT 06896 USA SN 1044-5110 J9 ATOMIZATION SPRAY JI Atom. Sprays PY 2012 VL 22 IS 9 BP 777 EP 806 PG 30 WC Engineering, Multidisciplinary; Engineering, Chemical; Engineering, Mechanical; Materials Science, Multidisciplinary; Physics, Applied SC Engineering; Materials Science; Physics GA 093CU UT WOS:000315170100004 ER PT S AU Muller, G AF Muller, George BE Dagli, CH TI Fuzzy architecture assessment for critical infrastructure resilience SO COMPLEX ADAPTIVE SYSTEMS 2012 SE Procedia Computer Science LA English DT Proceedings Paper CT Conference on Complex Adaptive Systems CY NOV 14-16, 2012 CL Washington, DC SP Missouri Univ Sci & Technol, Lockheed Martin, Mocana, Tata Consultancy Serv, GAK3, Drexel Univ Online, Hark.com DE resilience; infrastructure; fuzzy sets; input-output modeling AB This paper presents an approach for the selection of alternative architectures in a connected infrastructure system to increase resilience of the overall infrastructure system. The paper begins with a description of resilience and critical infrastructure, then summarizes existing approaches to resilience, and presents a fuzzy-rule based method of selecting among alternative infrastructure architectures. This methodology includes considerations which are most important when deciding on an approach to resilience. The paper concludes with a proposed approach which builds on existing resilience architecting methods by integrating key system aspects using fuzzy memberships and fuzzy rule sets. This novel approach aids the systems architect in considering resilience for the evaluation of architectures for adoption into the final system architecture. (C) 2012 Published by Elsevier Ltd. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Muller, G (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM george.muller@pnnl.gov NR 16 TC 2 Z9 2 U1 3 U2 10 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1877-0509 J9 PROCEDIA COMPUT SCI PY 2012 VL 12 BP 367 EP 372 DI 10.1016/j.procs.2012.09.086 PG 6 WC Computer Science, Artificial Intelligence; Computer Science, Theory & Methods; Mathematical & Computational Biology SC Computer Science; Mathematical & Computational Biology GA BDU80 UT WOS:000314992600058 ER PT S AU Boyd, RN Kajino, T Onaka, T AF Boyd, R. N. Kajino, T. Onaka, T. GP IOP TI Stardust, supernovae, neutrinos, and the chirality of the amino acids SO HITES 2012: HORIZONS OF INNOVATIVE THEORIES, EXPERIMENTS, AND SUPERCOMPUTING IN NUCLEAR PHYSICS SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Horizons of Innovative Theories, Experiments, and Supercomputing in Nuclear Physics (HITES) CY JUN 04-07, 2012 CL New Orleans, LA SP Louisiana State Univ (LSU), Louisiana State Univ (LSU), Ctr Computat & Technol (CCT), Louisiana State Univ (LSU). Dept Phys & Astronomy, Lawrence Livermore Natl Lab (LLNL), Int HPC Initiate Adv Res, Louisiana State Univ (LSU), Ctr Adv Microstruct & Devices (CAMD) ID NMR-SPECTROSCOPY; LYMAN-ALPHA; ORIGIN; ABSORPTION; METEORITE; REGIONS; STARS; LIFE AB A mechanism for creating amino acid enantiomerism that involves selection of one chirality by interactions with the neutrinos from a core-collapse supernova is defined. This selection mechanism involves the alignment between the spins of the neutrinos and of the N-14 nuclei in the amino acids, or in precursor molecules, which in turn couple to the molecular chirality. Details of the chiral selection, as well as the subsequent chemical evolution and galactic mixing that would ultimately populate the Galaxy with the selected species are discussed. The resulting amino acids could either be the source thereof on Earth, or could have produced the chirality that was ultimately achieved for Earthly amino acids. C1 [Boyd, R. N.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. [Kajino, T.] Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan. [Kajino, T.; Onaka, T.] Univ Tokyo, Grad Sch Sci, Dept Astron, Tokyo 1130033, Japan. RP Boyd, RN (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM richard11boyde@comcast.net FU US National Science Foundation [PHY-9901241]; Lawrence Livermore National Security, LLC, (LLNS) [DE-AC5207NA27344] FX This work was supported by the US National Science Foundation grant PHY-9901241, and under the auspices of the Lawrence Livermore National Security, LLC, (LLNS) under Contract No. DE-AC5207NA27344. NR 38 TC 1 Z9 1 U1 0 U2 8 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 403 AR 012032 DI 10.1088/1742-6596/403/1/012032 PG 7 WC Physics, Multidisciplinary; Physics, Nuclear SC Physics GA BDS65 UT WOS:000314706900033 ER PT S AU Dean, DJ AF Dean, D. J. GP IOP TI Nuclear physics in the coming decade SO HITES 2012: HORIZONS OF INNOVATIVE THEORIES, EXPERIMENTS, AND SUPERCOMPUTING IN NUCLEAR PHYSICS SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Horizons of Innovative Theories, Experiments, and Supercomputing in Nuclear Physics (HITES) CY JUN 04-07, 2012 CL New Orleans, LA SP Louisiana State Univ (LSU), Louisiana State Univ (LSU), Ctr Computat & Technol (CCT), Louisiana State Univ (LSU). Dept Phys & Astronomy, Lawrence Livermore Natl Lab (LLNL), Int HPC Initiat Adv Res, Louisiana State Univ (LSU), Ctr Adv Microstruct & Devices (CAMD) ID PARTICLE AB The summary talk for this conference is actually a brief status report on the physics of nuclei and what advances we may anticipate during the next decade. We are making progress on multiple fronts to tackle the nuclear quantum many-body problem. Due to the continuing expansion and use of computational science in our field, and due to the new experimental facilities that will soon be available, progress will continue. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Dean, DJ (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM deandj@ornl.gov OI Dean, David/0000-0002-5688-703X NR 25 TC 0 Z9 0 U1 0 U2 7 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 403 AR 012047 DI 10.1088/1742-6596/403/1/012047 PG 7 WC Physics, Multidisciplinary; Physics, Nuclear SC Physics GA BDS65 UT WOS:000314706900048 ER PT S AU Deibel, CM Afanasieva, L Albers, M Alcorta, M Almarez-Calderon, S Bedoor, S Bertone, PF Carnelli, P Chen, AA Chen, J Clark, JA Figueira, JM Greene, JP Hoffman, CR Irvine, D Jiang, CL Kay, BP Lai, J Lee, HY Lighthall, JC Manwell, S Marley, ST Nair, C Palachan-Hazan, T Pardo, RC Patel, N Paul, M Rasco, BC Rehm, KE Rogers, AM Shetty, D Ugalde, C Wuosmaa, A Zinkann, G AF Deibel, C. M. Afanasieva, L. Albers, M. Alcorta, M. Almarez-Calderon, S. Bedoor, S. Bertone, P. F. Carnelli, P. Chen, A. A. Chen, J. Clark, J. A. Figueira, J. M. Greene, J. P. Hoffman, C. R. Irvine, D. Jiang, C. L. Kay, B. P. Lai, J. Lee, H. Y. Lighthall, J. C. Manwell, S. Marley, S. T. Nair, C. Palachan-Hazan, T. Pardo, R. C. Patel, N. Paul, M. Rasco, B. C. Rehm, K. E. Rogers, A. M. Shetty, D. Ugalde, C. Wuosmaa, A. Zinkann, G. GP IOP TI Studying X-ray Burst Nucleosynthesis in the Laboratory SO HITES 2012: HORIZONS OF INNOVATIVE THEORIES, EXPERIMENTS, AND SUPERCOMPUTING IN NUCLEAR PHYSICS SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Horizons of Innovative Theories, Experiments, and Supercomputing in Nuclear Physics (HITES) CY JUN 04-07, 2012 CL New Orleans, LA SP Louisiana State Univ (LSU), Louisiana State Univ (LSU), Ctr Computat & Technol (CCT), Louisiana State Univ (LSU). Dept Phys & Astronomy, Lawrence Livermore Natl Lab (LLNL), Int HPC Initiate Adv Res, Louisiana State Univ (LSU), Ctr Adv Microstruct & Devices (CAMD) ID STATISTICAL-MODEL CALCULATIONS; ASTROPHYSICAL REACTION-RATES AB Type I X-ray bursts are the most common explosions in the Galaxy; however, the nucleosynthesis that occurs during the thermonuclear runaway and explosion is poorly understood. In this proceedings we discuss current experimental efforts and techniques that are being used to study X-ray burst nucleosynthesis in the laboratory. Specifically, radioactive ion beam techniques that have recently been developed have allowed the study of some of the most important (alpha, p) reactions in X-ray bursts for the first time. C1 [Deibel, C. M.; Afanasieva, L.; Lai, J.; Rasco, B. C.] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA. [Deibel, C. M.] Michigan State Univ, Joint Inst Nucl Astrophys, E Lansing, MI 48824 USA. [Deibel, C. M.; Albers, M.; Alcorta, M.; Almarez-Calderon, S.; Bertone, P. F.; Chen, J.; Clark, J. A.; Greene, J. P.; Hoffman, C. R.; Jiang, C. L.; Kay, B. P.; Lee, H. Y.; Lighthall, J. C.; Marley, S. T.; Nair, C.; Palachan-Hazan, T.; Pardo, R. C.; Ugalde, C.; Zinkann, G.] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. [Bedoor, S.; Lighthall, J. C.; Marley, S. T.; Shetty, D.; Wuosmaa, A.] Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA. [Carnelli, P.; Figueira, J. M.] Comis Nacl Energia Atom, Lab Tandar, Buenos Aires, DF, Argentina. [Irvine, D.; Manwell, S.] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada. [Patel, N.] Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA. [Paul, M.] Hebrew Univ Jerusalem, Racah Inst Phys, Jerusalem, Israel. RP Deibel, CM (reprint author), Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA. EM deibel@phys.lsu.edu RI Kay, Benjamin/F-3291-2011; Alcorta, Martin/G-7107-2011; OI Kay, Benjamin/0000-0002-7438-0208; Alcorta, Martin/0000-0002-6217-5004; Chen, Jun/0000-0003-0447-7466 FU NSF JINA [PHY0822648]; U.S. DOE [DE-AC02-06CH11357] FX We would also like to acknowledge funding from NSF JINA grant No. PHY0822648 and U.S. DOE contract No. DE-AC02-06CH11357. NR 20 TC 0 Z9 0 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 403 AR 012033 DI 10.1088/1742-6596/403/1/012033 PG 6 WC Physics, Multidisciplinary; Physics, Nuclear SC Physics GA BDS65 UT WOS:000314706900034 ER PT S AU Escher, JE Mukhamedzhanov, AM Thompson, IJ AF Escher, J. E. Mukhamedzhanov, A. M. Thompson, I. J. GP IOP TI Exploring R-matrix ideas for the description of one-nucleon transfer reactions SO HITES 2012: HORIZONS OF INNOVATIVE THEORIES, EXPERIMENTS, AND SUPERCOMPUTING IN NUCLEAR PHYSICS SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Horizons of Innovative Theories, Experiments, and Supercomputing in Nuclear Physics (HITES) CY JUN 04-07, 2012 CL New Orleans, LA SP Louisiana State Univ (LSU), Louisiana State Univ (LSU), Ctr Computat & Technol (CCT), Louisiana State Univ (LSU). Dept Phys & Astronomy, Lawrence Livermore Natl Lab (LLNL), Int HPC Initiate Adv Res, Louisiana State Univ (LSU), Ctr Adv Microstruct & Devices (CAMD) ID CHANNELS CALCULATIONS AB Deuteron-induced reactions, in particular (d,p) one-neutron transfer reactions, have been used for decades to investigate the structure of nuclei. These reactions, carried out in inverse kinematics, are expected to play a central role in the study of weakly-bound systems at modern radioactive beam facilities. While the theoretical framework and its computational implementation for describing (d,p) reactions have seen much progress over the decades, open questions remain and need to be addressed, including the proper treatment of transfers to resonance states. Recently, a new formalism was proposed [1] that, in principle, describes transfers to both bound and resonance states. The new formalism is summarized here and illustrated; implications are discussed. C1 [Escher, J. E.; Thompson, I. J.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. [Mukhamedzhanov, A. M.] Texas A&M Univ, Cyclotron Inst, College Stn, TX 77843 USA. RP Escher, JE (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. EM escher1@llnl.gov RI Escher, Jutta/E-1965-2013 FU U.S.Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]; DOE through the Topical Collaboration TORUS FX This work, performed under the auspices of the U.S.Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344,is supported by the DOE through the Topical Collaboration TORUS. NR 7 TC 0 Z9 0 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 403 AR 012026 DI 10.1088/1742-6596/403/1/012026 PG 6 WC Physics, Multidisciplinary; Physics, Nuclear SC Physics GA BDS65 UT WOS:000314706900027 ER PT S AU Gandolfi, S AF Gandolfi, Stefano GP IOP TI Quantum Monte Carlo study of inhomogeneous neutron matter SO HITES 2012: HORIZONS OF INNOVATIVE THEORIES, EXPERIMENTS, AND SUPERCOMPUTING IN NUCLEAR PHYSICS SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Horizons of Innovative Theories, Experiments, and Supercomputing in Nuclear Physics (HITES) CY JUN 04-07, 2012 CL New Orleans, LA SP Louisiana State Univ (LSU), Louisiana State Univ (LSU), Ctr Computat & Technol (CCT), Louisiana State Univ (LSU). Dept Phys & Astronomy, Lawrence Livermore Natl Lab (LLNL), Int HPC Initiate Adv Res, Louisiana State Univ (LSU), Ctr Adv Microstruct & Devices (CAMD) ID EQUATION-OF-STATE; NUCLEI; FORCES AB We present an ab-initio study of neutron drops. We use Quantum Monte Carlo techniques to calculate the energy up to 54 neutrons in different external potentials, and we compare the results with Skyrme forces. We also calculate the rms radii and radial densities, and we find that a re-adjustment of the gradient term in Skyrme is needed in order to reproduce the properties of these systems given by the ab-initio calculation. By using the ab-initio results for neutron drops for close- and open-shell configurations, we suggest how to improve Skyrme forces when dealing with systems with large isospin-asymmetries like neutron-rich nuclei. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Gandolfi, S (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM stefano@lanl.gov OI Gandolfi, Stefano/0000-0002-0430-9035 NR 30 TC 1 Z9 1 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 403 AR 012016 DI 10.1088/1742-6596/403/1/012016 PG 8 WC Physics, Multidisciplinary; Physics, Nuclear SC Physics GA BDS65 UT WOS:000314706900017 ER PT S AU Ginocchio, JN AF Ginocchio, Joseph N. GP IOP TI The Relativistic Origins of Pseudospin Symmetry in Nuclei SO HITES 2012: HORIZONS OF INNOVATIVE THEORIES, EXPERIMENTS, AND SUPERCOMPUTING IN NUCLEAR PHYSICS SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Horizons of Innovative Theories, Experiments, and Supercomputing in Nuclear Physics (HITES) CY JUN 04-07, 2012 CL New Orleans, LA SP Louisiana State Univ (LSU), Louisiana State Univ (LSU), Ctr Computat & Technol (CCT), Louisiana State Univ (LSU). Dept Phys & Astronomy, Lawrence Livermore Natl Lab (LLNL), Int HPC Initiat Adv Res, Louisiana State Univ (LSU), Ctr Adv Microstruct & Devices (CAMD) ID MIXED CONFIGURATIONS; TRANSITIONS; SCHEMES; PHYSICS AB Jerry Draayer has worked in approximate pseudospin and pseudo-U(3) symmetry in nuclei in the non-relativistic shell model. We show that pseudospin symmetry is a SU(2) relativistic symmetry of the Dirac Hamiltonian for which the sum of the vector and scalar potentials is a constant. We show that the Dirac Hamiltonian for which the sum of the vector harmonic oscillator potential and a scalar harmonic oscillator is a constant has a pseudo-U(3) symmetry and we derive the generators for this symmetry. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87544 USA. RP Ginocchio, JN (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87544 USA. EM gino@lanl.gov NR 28 TC 2 Z9 2 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 403 AR 012004 DI 10.1088/1742-6596/403/1/012004 PG 5 WC Physics, Multidisciplinary; Physics, Nuclear SC Physics GA BDS65 UT WOS:000314706900005 ER PT S AU Jaganathen, Y Michel, N Ploszajczak, M AF Jaganathen, Y. Michel, N. Ploszajczak, M. GP IOP TI Weakly bound systems, continuum effects, and reactions SO HITES 2012: HORIZONS OF INNOVATIVE THEORIES, EXPERIMENTS, AND SUPERCOMPUTING IN NUCLEAR PHYSICS SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Horizons of Innovative Theories, Experiments, and Supercomputing in Nuclear Physics (HITES) CY JUN 04-07, 2012 CL New Orleans, LA SP Louisiana State Univ (LSU), Louisiana State Univ (LSU), Ctr Computat & Technol (CCT), Louisiana State Univ (LSU). Dept Phys & Astronomy, Lawrence Livermore Natl Lab (LLNL), Int HPC Initiate Adv Res, Louisiana State Univ (LSU), Ctr Adv Microstruct & Devices (CAMD) ID SHELL-MODEL; NUCLEAR REACTIONS; QUANTUM-SYSTEMS; RESONANT STATES; UNIFIED THEORY; WAVE FUNCTIONS; SCATTERING; THRESHOLD AB Structure of weakly bound/unbound nuclei close to particle drip lines is different from that around the valley of beta stability. A comprehensive description of these systems goes beyond standard Shell Model (SM) and demands an open quantum system description of the nuclear many-body system. We approach this problem using the Gamow Shell Model (GSM) which provides a fully microscopic description of bound and unbound nuclear states, nuclear decays, and reactions. We present in this paper the first application of the GSM for a description of the elastic and inelastic scattering of protons on He-6. C1 [Jaganathen, Y.; Ploszajczak, M.] CNRS, IN2P3, CEA, GANIL,DSM, BP 55027, F-14076 Caen, France. [Michel, N.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. [Michel, N.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Jaganathen, Y (reprint author), CNRS, IN2P3, CEA, GANIL,DSM, BP 55027, F-14076 Caen, France. EM ploszajczak@ganil.fr FU MNiSW [N N202 033837]; Collaboration COPIN- GANIL; U.S. Department of Energy [DE-FG02-96ER40963, DE-FG02-10ER41700] FX This paper is written to honor important and numerous contributions of Jerry P. Draayer to the nuclear many- body theory. This work has been supported in part by the by the MNiSW grant No. N N202 033837; the Collaboration COPIN- GANIL; and U.S. Department of Energy under Contract Nos. DE-FG02-96ER40963 (University of Tennessee) and DE-FG02-10ER41700 (French- U.S. Theory Institute for Physics with Exotic Nuclei). NR 51 TC 7 Z9 7 U1 0 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 403 AR 012022 DI 10.1088/1742-6596/403/1/012022 PG 10 WC Physics, Multidisciplinary; Physics, Nuclear SC Physics GA BDS65 UT WOS:000314706900023 ER PT S AU Linhardt, LE Baby, L Bardayan, DW Blackmon, JC Gardiner, H Johnson, E Koschiy, E Macon, KT Matos, M Rasco, BC Rogachev, G Santiago-Gonzalez, D Wiedenhoever, I AF Linhardt, L. E. Baby, L. Bardayan, D. W. Blackmon, J. C. Gardiner, H. Johnson, E. Koschiy, E. Macon, K. T. Matos, M. Rasco, B. C. Rogachev, G. Santiago-Gonzalez, D. Wiedenhoever, I. GP IOP TI Measurement of F-17 + p reactions with ANASEN SO HITES 2012: HORIZONS OF INNOVATIVE THEORIES, EXPERIMENTS, AND SUPERCOMPUTING IN NUCLEAR PHYSICS SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Horizons of Innovative Theories, Experiments, and Supercomputing in Nuclear Physics (HITES) CY JUN 04-07, 2012 CL New Orleans, LA SP Louisiana State Univ (LSU), Louisiana State Univ (LSU), Ctr Computat & Technol (CCT), Louisiana State Univ (LSU). Dept Phys & Astronomy, Lawrence Livermore Natl Lab (LLNL), Int HPC Initiate Adv Res, Louisiana State Univ (LSU), Ctr Adv Microstruct & Devices (CAMD) AB Reactions involving radioactive nuclei play an important role in stellar explosions, but those reactions involving short-lived nuclei have only limited experimental information available due to currently limited beam intensities. Several facilities are aiming to provide greater access to these unstable isotopes at higher beam intensities, but more efficient and selective techniques and devices are needed to properly study these important reactions. The Array for Nuclear Astrophysics Studies with Exotic Nuclei (ANASEN), a charged particle detector designed by Louisiana State University (LSU) and Florida State University (FSU), was created for this purpose. ANASEN is used to study the reactions important in the alpha p- and rp-processes with proton-rich exotic nuclei, providing essentially complete solid angle coverage through an array of 40 silicon-strip detectors backed with CsI scintillators, covering an area of roughly 1300 cm(2). ANASEN also includes an active gas target/detector in a position-sensitive annular gas proportional counter, which allows direct measurement of (alpha,p) reactions in inverse kinematics The first in-beam measurements with a partial implementation of ANASEN were performed at the RESOLUT radioactive beam facility of FSU during the summer of 2011. They included stable beam experiments and measurements of the F-17(p,p)F-17 and F-17(p,alpha)O-14 reactions which are important to understanding the structure of Ne-18 and the O-14(alpha,p)F-17 reaction rate. The performance of ANASEN and initial results from the F-17 studies will be presented. C1 [Linhardt, L. E.; Blackmon, J. C.; Gardiner, H.; Macon, K. T.; Matos, M.; Rasco, B. C.] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA. [Baby, L.; Johnson, E.; Koschiy, E.; Rogachev, G.; Santiago-Gonzalez, D.] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA. [Baby, L.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Linhardt, LE (reprint author), Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA. EM llinha2@tigers.lsu.edu RI Matos, Milan/G-6947-2012 OI Matos, Milan/0000-0003-1722-9509 FU National Science Foundation [0821308]; U.S. Department of Energy Office of Nuclear Physics [DE-FG02-96ER40978] FX This work is supported by the National Science Foundation Award # 0821308 and by the U.S. Department of Energy Office of Nuclear Physics grant # DE-FG02-96ER40978. NR 4 TC 2 Z9 2 U1 0 U2 7 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 403 AR 012036 DI 10.1088/1742-6596/403/1/012036 PG 5 WC Physics, Multidisciplinary; Physics, Nuclear SC Physics GA BDS65 UT WOS:000314706900037 ER PT S AU Luu, T AF Luu, Thomas GP IOP TI Nuclear Physics in Box SO HITES 2012: HORIZONS OF INNOVATIVE THEORIES, EXPERIMENTS, AND SUPERCOMPUTING IN NUCLEAR PHYSICS SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Horizons of Innovative Theories, Experiments, and Supercomputing in Nuclear Physics (HITES) CY JUN 04-07, 2012 CL New Orleans, LA SP Louisiana State Univ (LSU), Louisiana State Univ (LSU), Ctr Computat & Technol (CCT), Louisiana State Univ (LSU). Dept Phys & Astronomy, Lawrence Livermore Natl Lab (LLNL), Int HPC Initiat Adv Res, Louisiana State Univ (LSU), Ctr Adv Microstruct & Devices (CAMD) ID LATTICE QCD; DIBARYON; STATES AB I provide a short overview of the current status of nuclear physics calculations using lattice Quantum Chromodynamics (LQCD). I demonstrate, at a very high level, how LQCD calculations are performed and how nuclear scattering data are extracted from these calculations, emphasizing the overlap between traditional nuclear many-body theory and LQCD calculations. I look at the Omega(-)Omega(-) system as a concrete example, and in so doing demonstrate the predictive nature of LQCD calculations as applied to nuclear physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Luu, T (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM tluu@llnl.gov NR 21 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 403 AR 012041 DI 10.1088/1742-6596/403/1/012041 PG 8 WC Physics, Multidisciplinary; Physics, Nuclear SC Physics GA BDS65 UT WOS:000314706900042 ER PT S AU Richards, D AF Richards, David CA Hadron Spectrum Calculation GP IOP TI The Excited-state Spectrum of QCD through Lattice Gauge Theory Calculations SO HITES 2012: HORIZONS OF INNOVATIVE THEORIES, EXPERIMENTS, AND SUPERCOMPUTING IN NUCLEAR PHYSICS SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Horizons of Innovative Theories, Experiments, and Supercomputing in Nuclear Physics (HITES) CY JUN 04-07, 2012 CL New Orleans, LA SP Louisiana State Univ (LSU), Louisiana State Univ (LSU), Ctr Computat & Technol (CCT), Louisiana State Univ (LSU). Dept Phys & Astronomy, Lawrence Livermore Natl Lab (LLNL), Int HPC Initiat Adv Res, Louisiana State Univ (LSU), Ctr Adv Microstruct & Devices (CAMD) ID SCATTERING MATRIX; MESONS; HYBRID AB I describe the computation of the spectrum of Quantum Chromodynamics through first principles calculations using lattice gauge theory. I begin outlining briefly the formulation of QCD on a lattice, and then describe some of the challenges in computing the exciting state spectrum of the theory. I then present recent results for the spectrum for mesons containing both the light and heavier charm quarks, and for baryons containing the light quarks. A particular emphasis will be laid on the role played by gluons within the spectrum. I conclude by some of the challenges that remain, notably those due to strong decays, and the prospect for future calculations. C1 [Richards, David; Hadron Spectrum Calculation] Jefferson Lab, Newport News, VA 23606 USA. RP Richards, D (reprint author), Jefferson Lab, 12000 Jefferson Ave, Newport News, VA 23606 USA. EM dgr@jlab.org NR 24 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 403 AR 012044 DI 10.1088/1742-6596/403/1/012044 PG 8 WC Physics, Multidisciplinary; Physics, Nuclear SC Physics GA BDS65 UT WOS:000314706900045 ER PT S AU Alverson, G Eulisse, G McCauley, T Taylor, L AF Alverson, G. Eulisse, G. McCauley, T. Taylor, L. GP IOP TI iSpy: a powerful and lightweight event display SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB iSpy is a general-purpose event data and detector visualization program that was developed as an event display for the CMS experiment at the LHC and has seen use by the general public and teachers and students in the context of education and outreach. Central to the iSpy design philosophy is ease of installation, use, and extensibility. The application itself uses the open-access packages Qt4 and Open Inventor and is distributed either as a fully-bound executable or a standard installer package: one can simply download and double-click to begin. Mac OSX, Linux, and Windows are supported. iSpy renders the standard 2D, 3D, and tabular views, and the architecture allows for a generic approach to production of new views and projections. iSpy reads and displays data in the ig format: event information is written in compressed JSON format files designed for distribution over a network. This format is easily extensible and makes the iSpy client indifferent to the original input data source. The ig format is the one used for release of approved CMS data to the public. C1 [Alverson, G.] Northeastern Univ, Boston, MA 02115 USA. [Eulisse, G.; McCauley, T.; Taylor, L.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Alverson, G (reprint author), Northeastern Univ, Boston, MA 02115 USA. EM george.alverson@cern.ch; giulio.eulisse@cern.ch; thomas.mccauley@cern.ch; lucas.taylor@cern.ch FU Luis Lopera Gonzalez and Zhang Jinzhong; US DOE; NSF FX We wish to thank former developers Shahzad Muzaffar, Ianna Osborne, and Lassi Tuura as well as support from Luis Lopera Gonzalez and Zhang Jinzhong. We also acknowledge the support of the US DOE and NSF. NR 2 TC 3 Z9 3 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 022002 DI 10.1088/1742-6596/396/2/022002 PG 6 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749800055 ER PT S AU Anisenkov, A Belov, S Di Girolamo, A Gayazov, S Klimentov, A Oleynik, D Senchenko, A AF Anisenkov, Alexey Belov, Sergey Di Girolamo, Alessandro Gayazov, Stavro Klimentov, Alexei Oleynik, Danila Senchenko, Alexander CA ATLAS Collaboration GP IOP TI AGIS: The ATLAS Grid Information System SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB ATLAS is a particle physics experiment at the Large Hadron Collider at CERN. The experiment produces petabytes of data annually through simulation production and tens petabytes of data per year from the detector itself. The ATLAS Computing model embraces the Grid paradigm and a high degree of decentralization and computing resources able to meet ATLAS requirements of petabytes scale data operations. In this paper we present ATLAS Grid Information System (AGIS) designed to integrate configuration and status information about resources, services and topology of whole ATLAS Grid needed by ATLAS Distributed Computing applications and services. C1 [Anisenkov, Alexey; Gayazov, Stavro; Senchenko, Alexander] Budker Inst Nucl Phys, Novosibirsk 630090, Russia. [Belov, Sergey; Oleynik, Danila] Joint Inst Nucl Res, Lab Informat Technol, Dubna, Russia. [Di Girolamo, Alessandro] CERN, ES Dept, CH-1211 Geneva, Switzerland. [Klimentov, Alexei] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Anisenkov, A (reprint author), Budker Inst Nucl Phys, Novosibirsk 630090, Russia. EM Alexey.Anisenkov@cern.ch NR 5 TC 4 Z9 4 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 032006 DI 10.1088/1742-6596/396/3/032006 PG 6 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801019 ER PT S AU Arkhipkin, D Lauret, J Betts, W Van Buren, G AF Arkhipkin, D. Lauret, J. Betts, W. Van Buren, G. GP IOP TI Online Meta-data Collection and Monitoring Framework for the STAR Experiment at RHIC SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The STAR Experiment further exploits scalable message-oriented model principles to achieve a high level of control over online data streams. In this paper we present an AMQP-powered Message Interface and Reliable Architecture framework (MIRA), which allows STAR to orchestrate the activities of Meta-data Collection, Monitoring, Online QA and several Run-Time and Data Acquisition system components in a very efficient manner. The very nature of the reliable message bus suggests parallel usage of multiple independent storage mechanisms for our meta-data. We describe our experience with a robust data-taking setup employing MySQL- and HyperTable-based archivers for meta-data processing. In addition, MIRA has an AJAX-enabled web GUI, which allows real-time visualisation of online process flow and detector subsystem states, and doubles as a sophisticated alarm system when combined with complex event processing engines like Esper, Borealis or Cayuga. The performance data and our planned path forward are based on our experience during the 2011-2012 running of STAR. C1 [Arkhipkin, D.; Lauret, J.; Betts, W.; Van Buren, G.] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Arkhipkin, D (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. EM arkhipkin@bnl.gov; jlauret@bnl.gov; wbetts@bnl.gov; gene@bnl.gov NR 5 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 012002 DI 10.1088/1742-6596/396/1/012002 PG 6 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749800002 ER PT S AU Badgett, W AF Badgett, W. CA CDF Collaboration GP IOP TI A Final Review of the Performance of the CDF Run II Data Acquisition System SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The CDF Collider Detector at Fermilab ceased data collection on September 30, 2011 after over twenty-five years of operation. We review the performance of the CDF Run II data acquisition systems over the last ten of these years while recording nearly 10 inverse femtobarns of proton-antiproton collisions with a high degree of efficiency - exceeding 83%. Technology choices in the online control and configuration systems and front-end embedded processing have impacted the efficiency and quality of the data accumulated by CDF, and have had to perform over a large range of instantaneous luminosity values and trigger rates. We identify significant sources of problems and successes. In particular, we present our experience computing and acquiring data in a radiation environment, and attempt to correlate system technical faults with radiation dose rate and technology choices. C1 [Badgett, W.; CDF Collaboration] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Badgett, W (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM badgett@fnal.gov NR 9 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 012004 DI 10.1088/1742-6596/396/1/012004 PG 18 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749800004 ER PT S AU Bagliesi, G Bloom, K Bonacorsi, D Brew, C Fisk, I Flix, J Kreuzer, P Sciaba, A AF Bagliesi, Giuseppe Bloom, Kenneth Bonacorsi, Daniele Brew, Chris Fisk, Ian Flix, Jose Kreuzer, Peter Sciaba, Andrea GP IOP TI CMS resource utilization and limitations on the grid after the first two years of LHC collisions SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB After years of development, the CMS distributed computing system is now in full operation. The LHC continues to set records for operational performance, and CMS records data at more than 300 Hz. Because of the intensity of the beams, there are multiple proton-proton interactions per beam crossing, leading to ever-larger event sizes and processing times. The CMS computing system has responded admirably to these challenges, but some reoptimization of the computing model has been required to maximize the efficient delivery of data analysis results by the collaboration in the face of increasingly constrained computing resources. We present the current status of the system, describe the recent performance, and discuss the challenges ahead and how CMS intends to meet them. C1 [Bloom, Kenneth] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA. [Bagliesi, Giuseppe] Univ Pisa, Sez INFN, I-56100 Pisa, Italy. [Bonacorsi, Daniele] Univ Bologna, Sez INFN, I-40127 Bologna, Italy. [Brew, Chris] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. [Fisk, Ian] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. [Flix, Jose] CIEMAT, Ctr Invest Energt Medioambientales & Technol, PIC, E-28040 Madrid, Spain. [Kreuzer, Peter] Rhein Westfal TH Aachen, Physikal Inst A 3, D-52056 Aachen, Germany. [Sciaba, Andrea] European Org Nucl Res, CH-1211 Geneva, Switzerland. RP Bloom, K (reprint author), Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA. EM kenbloom@unl.edu RI Flix, Josep/G-5414-2012 OI Flix, Josep/0000-0003-2688-8047 FU U.S. Department of Energy, Office of Science, HEP, Scientific Computing FX Scientific Computing Division, Fermi National Accelerator Laboratory, Batavia, IL, USA. This work was supported in part by the U.S. Department of Energy, Office of Science, HEP, Scientific Computing. NR 2 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 032012 DI 10.1088/1742-6596/396/3/032012 PG 10 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801025 ER PT S AU Bauerdick, LAT Bloom, K Bockelman, B Bradley, DC Dasu, S Sfiligoi, I Tadel, A Tadel, M Wuerthwein, F Yagil, A AF Bauerdick, L. A. T. Bloom, K. Bockelman, B. Bradley, D. C. Dasu, S. Sfiligoi, I. Tadel, A. Tadel, M. Wuerthwein, F. Yagil, A. CA CMS Collaboration GP IOP TI Xrootd Monitoring for the CMS Experiment SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB During spring and summer of 2011, CMS deployed Xrootd-based access for all US T1 and T2 sites. This allows for remote access to all experiment data on disk in the US. It is used for user analysis, visualization, running of jobs at computing sites when data is not available at local sites, and as a fail-over mechanism for data access in jobs. Monitoring of this Xrootd infrastructure is implemented on three levels. Basic service and data availability checks are performed by Nagios probes. The second level uses Xrootd's "summary data" stream; this data is aggregated from all sites and fed into a MonALISA service providing visualization and storage. The third level uses Xrootd's "detailed monitoring" stream, which includes detailed information about users, opened files and individual data transfers. A custom application was developed to process this information. It currently provides a real-time view of the system usage and can store data into ROOT files for detailed analysis. Detailed monitoring allows us to determine dataset popularity and to detect abuses of the system, including sub-optimal usage of the Xrootd protocol and the ROOT prefetching mechanism. C1 [Bauerdick, L. A. T.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Tadel, M (reprint author), Univ Calif San Diego, La Jolla, CA 92093 USA. EM mtadel@ucsd.edu FU US National Science Foundation [PHY-0612805 (CMS Maintenance Operations), PHY- 1104549, PHY - 1104447, PHY - 1104664 (AAA)]; US Department of Energy [DE - FC02-06ER41436, 647F290 (OSG)] FX This work is partially sponsored by the US National Science Foundation under Grants No. PHY-0612805 (CMS Maintenance & Operations), PHY - 1104549, PHY - 1104447, and PHY - 1104664 (AAA), and the US Department of Energy under Grant No. DE - FC02-06ER41436 subcontract No.647F290 (OSG). NR 5 TC 2 Z9 2 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 042058 DI 10.1088/1742-6596/396/4/042058 PG 9 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749802088 ER PT S AU Bauerdick, LAT Sciaba, A AF Bauerdick, L. A. T. Sciaba, A. GP IOP TI Towards a global monitoring system for CMS computing operations SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The operation of the CMS computing system requires a complex monitoring system to cover all its aspects: central services, databases, the distributed computing infrastructure, production and analysis workflows, the global overview of the CMS computing activities and the related historical information. Several tools are available to provide this information, developed both inside and outside of the collaboration and often used in common with other experiments. Despite the fact that the current monitoring allowed CMS to successfully perform its computing operations, an evolution of the system is clearly required, to adapt to the recent changes in the data and workload management tools and models and to address some shortcomings that make its usage less than optimal. Therefore, a recent and ongoing coordinated effort was started in CMS, aiming at improving the entire monitoring system by identifying its weaknesses and the new requirements from the stakeholders, rationalise and streamline existing components and drive future software development. This contribution gives a complete overview of the CMS monitoring system and a description of all the recent activities that have been started with the goal of providing a more integrated, modern and functional global monitoring system for computing operations. C1 [Bauerdick, L. A. T.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Bauerdick, LAT (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM bauerdick@fnal.gov; Andrea.Sciaba@cern.ch NR 27 TC 1 Z9 1 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 032099 DI 10.1088/1742-6596/396/3/032099 PG 9 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749802008 ER PT S AU Bauerdick, LAT Eulisse, G Jones, C Kovalskyi, D McCauley, T Tadel, AM Osborne, I Tadel, M Yagil, A AF Bauerdick, L. A. T. Eulisse, G. Jones, C. Kovalskyi, D. McCauley, T. Tadel, A. Mrak Osborne, I. Tadel, M. Yagil, A. GP IOP TI Multiple-view, Multiple-selection Visualization of Simulation Geometry in CMS SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB Fireworks, the event-display program of CMS, was extended with an advanced geometry visualization package. ROOT's TGeo geometry is used as internal representation, shared among several geometry views. Each view is represented by a GUI list-tree widget, implemented as a flat vector to allow for fast searching, selection, and filtering by material type, node name, and shape type. Display of logical and physical volumes is supported. Color, transparency, and visibility flags can be modified for each node or for a selection of nodes. Further operations, like opening of a new view or changing of the root node, can be performed via a context menu. Node selection and graphical properties determined by the list-tree view can be visualized in any 3D graphics view of Fireworks. As each 3D view can display any number of geometry views, a user is free to combine different geometry-view selections within the same 3D view. Node-selection by proximity to a given point is possible. A visual clipping box can be set for each geometry view to limit geometry drawing into a specified region. Visualization of geometric overlaps, as detected by TGeo, is also supported. The geometry visualization package is used for detailed inspection and display of simulation geometry with or without the event data. It also serves as a tool for geometry debugging and inspection, facilitating development of geometries for CMS detector upgrades and for SLHC. C1 [Bauerdick, L. A. T.; Eulisse, G.; Jones, C.; McCauley, T.; Osborne, I.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Tadel, AM (reprint author), Univ Calif San Diego, La Jolla, CA 92093 USA. EM amraktadel@ucsd.edu; mtadel@ucsd.edu NR 6 TC 0 Z9 0 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 022052 DI 10.1088/1742-6596/396/2/022052 PG 8 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801004 ER PT S AU Bauerdick, L Ernst, M Fraser, D Livny, M Pordes, R Sehgal, C Wurthwein, F AF Bauerdick, Lothar Ernst, Michael Fraser, Dan Livny, Miron Pordes, Ruth Sehgal, Chander Wuerthwein, Frank CA Open Sci Grid GP IOP TI The Open Science Grid - Support for Multi-Disciplinary Team Science - the Adolescent Years SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB As it enters adolescence the Open Science Grid (OSG) is bringing a maturing fabric of Distributed High Throughput Computing (DHTC) services that supports an expanding HEP community to an increasingly diverse spectrum of domain scientists. Working closely with researchers on campuses throughout the US and in collaboration with national cyberinfrastructure initiatives, we transform their computing environment through new concepts, advanced tools and deep experience. We discuss examples of these including: the pilot-job overlay concepts and technologies now in use throughout OSG and delivering 1.4 Million CPU hours/day; the role of campus infrastructures- built out from concepts of sharing across multiple local faculty clusters (made good use of already by many of the HEP Tier-2 sites in the US); the work towards the use of clouds and access to high throughput parallel (multi-core and GPU) compute resources; and the progress we are making towards meeting the data management and access needs of non-HEP communities with general tools derived from the experience of the parochial tools in HEP (integration of Globus Online, prototyping with IRODS, investigations into Wide Area Lustre). We will also review our activities and experiences as HTC Service Provider to the recently awarded NSF XD XSEDE project, the evolution of the US NSF TeraGrid project, and how we are extending the reach of HTC through this activity to the increasingly broad national cyberinfrastructure. We believe that a coordinated view of the HPC and HTC resources in the US will further expand their impact on scientific discovery. C1 [Bauerdick, Lothar; Ernst, Michael; Fraser, Dan; Livny, Miron; Pordes, Ruth; Sehgal, Chander; Wuerthwein, Frank; Open Sci Grid] Univ Calif San Diego, Univ Wisconsin Madison, Brookhaven Natl Lab, Fermilab,Argonne Natl Lab,Comp Sci Dept, La Jolla, CA 92093 USA. RP Bauerdick, L (reprint author), Univ Calif San Diego, Univ Wisconsin Madison, Brookhaven Natl Lab, Fermilab,Argonne Natl Lab,Comp Sci Dept, La Jolla, CA 92093 USA. NR 4 TC 2 Z9 2 U1 0 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 042048 DI 10.1088/1742-6596/396/4/042048 PG 7 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749802078 ER PT S AU Bhimji, W Cranshaw, J van Gemmeren, P Malon, D Schaffer, RD Vukotic, I AF Bhimji, W. Cranshaw, J. van Gemmeren, P. Malon, D. Schaffer, R. D. Vukotic, I. CA ATLAS Collaboration GP IOP TI The ATLAS ROOT-based data formats: recent improvements and performance measurements SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB We detail recent changes to ROOT-based I/O within the ATLAS experiment. The ATLAS persistent event data model continues to make considerable use of a ROOT I/O backend through POOL persistency. Also ROOT is used directly in later stages of analysis that make use of a flat-ntuple based "D3PD" data-type. For POOL/ROOT persistent data, several improvements have been made including implementation of automatic basket optimisation, memberwise streaming, and changes to split and compression levels. Optimisations have also been made for the D3PD format. We present a full evaluation of the resulting performance improvements from these, including in the case of selected retrieval of events. We also evaluate ongoing changes internal to ROOT, in the ATLAS context, for both POOL and D3PD data. We report results not only from test systems, but also utilising new automated tests on real ATLAS production resources which employ a wide range of storage technologies. C1 [Bhimji, W.] Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Kings Bldg,Mayfield Rd, Edinburgh EH9 3JZ, Midlothian, Scotland. [Cranshaw, J.; van Gemmeren, P.; Malon, D.] ANL, Lemont, IL 60439 USA. [Schaffer, R. D.] Univ Paris Sud 11, Lab IAccelerateur Lineaire, F-91898 Orsay, France. [Vukotic, I.] Univ Chicago, Chicago, IL 60637 USA. RP Bhimji, W (reprint author), Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg,Kings Bldg,Mayfield Rd, Edinburgh EH9 3JZ, Midlothian, Scotland. EM wbhimji@staffmail.ed.ac.uk NR 6 TC 1 Z9 1 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 022006 DI 10.1088/1742-6596/396/2/022006 PG 11 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749800059 ER PT S AU Bobyshev, A Demar, P Grigaliunas, V Bigrow, J Hoeft, B Reymund, A AF Bobyshev, A. DeMar, P. Grigaliunas, V. Bigrow, J. Hoeft, B. Reymund, A. GP IOP TI Status and Trends in Networking at LHC Tier1 Facilities SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The LHC is entering its fourth year of production operation. Most Tier1 facilities have been in operation for almost a decade, when development and ramp-up efforts are included. LHC's distributed computing model is based on the availability of high capacity, high performance network facilities for both the WAN and LAN data movement, particularly within the Tier1 centers. As a result, the Tier1 centers tend to be on the leading edge of data center networking technology. In this paper, we analyze past and current developments in Tier1 LAN networking, as well as extrapolating where we anticipate networking technology is heading. Our analysis will include examination into the following areas: center dot Evolution of Tier1 centers to their current state center dot Evolving data center networking models and how they apply to Tier1 centers center dot Impact of emerging network technologies (e.g. 10GE-connected hosts, 40GE/100GE links, IPv6) on Tier1 centers center dot Trends in WAN data movement and emergence of software-defined WAN network capabilities center dot Network virtualization C1 [Bobyshev, A.; DeMar, P.; Grigaliunas, V.] Fermilab Natl Accelerator Lab, Comp Div, Batavia, IL 60510 USA. RP Bobyshev, A (reprint author), Fermilab Natl Accelerator Lab, Comp Div, Batavia, IL 60510 USA. EM bobyshev@fnal.gov; demar@fnal.gov; vyto@fnal.gov; big@bnl.gov; Bruno.Hoeft@kit.edu; Aurelie.Reymund@kit.edu NR 3 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 042011 DI 10.1088/1742-6596/396/4/042011 PG 13 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749802041 ER PT S AU Caballero, J Hover, J Love, P Stewart, GA AF Caballero, J. Hover, J. Love, P. Stewart, G. A. CA ATLAS Collaboration GP IOP TI AutoPyFactory: A Scalable Flexible Pilot Factory Implementation SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The ATLAS experiment at the CERN LHC is one of the largest users of grid computing infrastructure, which is a central part of the experiment's computing operations. Considerable efforts have been made to use grid technology in the most efficient and effective way, including the use of a pilot job based workload management framework. In this model the experiment submits 'pilot' jobs to sites without payload. When these jobs begin to run they contact a central service to pick-up a real payload to execute. The first generation of pilot factories were usually specific to a single Virtual Organization (VO), and were bound to the particular architecture of that VO's distributed processing. A second generation provides factories which are more flexible, not tied to any particular VO, and provide new and improved features such as monitoring, logging, profiling, etc. In this paper we describe this key part of the ATLAS pilot architecture, a second generation pilot factory, AutoPyFactory. AutoPyFactory has a modular design and is highly configurable. It is able to send different types of pilots to sites and exploit different submission mechanisms and queue characteristics. It is tightly integrated with the PanDA job submission framework, coupling pilot flow to the amount of work the site has to run. It gathers information from many sources in order to correctly configure itself for a site and its decision logic can easily be updated. Integrated into AutoPyFactory is a flexible system for delivering both generic and specific job wrappers which can perform many useful actions before starting to run end-user scientific applications, e. g., validation of the middleware, node profiling and diagnostics, and monitoring. AutoPyFactory also has a robust monitoring system that has been invaluable in establishing a reliable pilot factory service for ATLAS. C1 [Caballero, J.; Hover, J.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Caballero, J (reprint author), Brookhaven Natl Lab, POB 5000, Upton, NY 11973 USA. EM jcaballero@bnl.gov NR 4 TC 4 Z9 4 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 032016 DI 10.1088/1742-6596/396/3/032016 PG 9 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801029 ER PT S AU Calafiura, P Eranian, S Levinthal, D Kama, S Vitillo, RA AF Calafiura, P. Eranian, S. Levinthal, D. Kama, S. Vitillo, R. A. GP IOP TI GOoDA: The Generic Optimization Data Analyzer SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB Modern superscalar, out-of-order microprocessors dominate large scale server computing. Monitoring their activity, during program execution, has become complicated due to the complexity of the microarchitectures and their IO interactions. Recent processors have thousands of performance monitoring events. These are required to actually provide coverage for all of the complex interactions and performance issues that can occur. Knowing which data to collect and how to interpret the results has become an unreasonable burden for code developers whose tasks are already hard enough. It becomes the task of the analysis tool developer to bridge this gap. To address this issue, a generic decomposition of how a microprocessor is using the consumed cycles allows code developers to quickly understand which of the myriad of microarchitectural complexities they are battling, without requiring a detailed knowledge of the microarchitecture. When this approach is intrinsically integrated into a performance data analysis tool, it enables software developers to take advantage of the microarchitectural methodology that has only been available to experts. The Generic Optimization Data Analyzer (GOoDA) project integrates this expertise into a profiling tool in order to lower the required expertise of the user and, being designed from the ground up with large-scale object-oriented applications in mind, it will be particularly useful for large HENP codebases C1 [Calafiura, P.; Vitillo, R. A.] Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94703 USA. RP Calafiura, P (reprint author), Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94703 USA. EM lblcalaf@gmail.com; eranian@google.com; levinth@google.com; sami.kama@cern.ch; ravitillo@lbl.gov NR 2 TC 3 Z9 3 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 052072 DI 10.1088/1742-6596/396/5/052072 PG 11 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749803063 ER PT S AU Canal, P AF Canal, Ph GP IOP TI ROOT I/O Improvements SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB In the past year, the development of ROOT I/O has focused on improving the existing code and increasing the collaboration with the experiments' experts. Regular I/O workshops have been held to share and build upon the various experiences and points of view. The resulting improvements in ROOT I/O span many dimensions including reduction and more control over the memory usage, reduction in CPU usage as well as optimization of the file size and the hardware I/O utilization. Many of these enhancements came as a result of an increased collaboration with the experiments' development teams and their direct contributions both in code and quarterly ROOT I/O workshops. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Canal, P (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM pcanal@fnal.gov NR 4 TC 1 Z9 1 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 052017 DI 10.1088/1742-6596/396/5/052017 PG 8 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749803008 ER PT S AU Corvo, M Bianchi, F Ciaschini, V Delprete, D Di Simone, A Donvito, G Fella, A Giacomini, F Gianoli, A Longo, S Luitz, S Luppi, E Manzali, M Pardi, S Perezm, A Rama, M Russo, G Santeramo, B Stroili, R Tomassetti, L AF Corvo, M. Bianchi, F. Ciaschini, V. Delprete, D. Di Simone, A. Donvito, G. Fella, A. Giacomini, F. Gianoli, A. Longo, S. Luitz, S. Luppi, E. Manzali, M. Pardi, S. Perezm, A. Rama, M. Russo, G. Santeramo, B. Stroili, R. Tomassetti, L. GP IOP TI Exploiting new CPU architectures in the SuperB software framework SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ ID DETECTOR AB The SuperB asymmetric-energy e(+)e(-) collider and detector to be built at the newly founded Nicola Cabibbo Lab will provide a uniquely sensitive probe of New Physics in the flavour sector of the Standard Model. Studying minute effects in the heavy quark and heavy lepton sectors requires a data sample of 75ab(-1) and a luminosity target of 10(36) cm(-2) s(-1). These parameters require a substantial growth in computing requirements and performances. The SuperB collaboration is thus investigating the advantages of new CPU architectures (multi and many cores) and how to exploit their capability of task parallelization in the framework for simulation and analysis software. In this work we present the underlying architecture which we intend to use and some preliminary performance results of the first framework prototype. C1 [Corvo, M.; Fella, A.] CNRS, F-91405 Orsay, France. [Corvo, M.; Longo, S.; Stroili, R.] INFN & Univ Padova, Padua, Italy. [Bianchi, F.] INFN & Univ Torino, Turin, Italy. [Ciaschini, V.; Giacomini, F.] INFN, Bologna, Italy. [Delprete, D.; Pardi, S.; Russo, G.] INFN & Univ Napoli, Naples, Italy. [Di Simone, A.] INFN & Univ Roma Tor Vergata, Tor Vergata, Italy. [Donvito, G.; Santeramo, B.] INFN & Univ Bari, Bari, Italy. [Gianoli, A.; Luppi, E.; Manzali, M.; Tomassetti, L.] INFN & Univ Ferrara, Ferrara, Italy. [Luitz, S.] SLAC, Menlo Pk, CA USA. [Fella, A.; Perezm, A.] INFN & Univ Pisa, Pisa, Italy. [Rama, M.] LNF, Frascati, Italy. RP Corvo, M (reprint author), CNRS, F-91405 Orsay, France. EM corvo@pd.infn.it RI Tomassetti, Luca/G-5065-2012; Di Simone, Andrea/K-6609-2013; Gianoli, Alberto/H-5544-2015; Luppi, Eleonora/A-4902-2015; OI Manzali, Matteo/0000-0001-6163-3782; Tomassetti, Luca/0000-0003-4184-1335; Di Simone, Andrea/0000-0003-0201-3377; Gianoli, Alberto/0000-0002-2456-8667; Donvito, Giacinto/0000-0002-0628-1080; Luppi, Eleonora/0000-0002-1072-5633; Giacomini, Francesco/0000-0002-3129-2814 NR 8 TC 0 Z9 0 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 022010 DI 10.1088/1742-6596/396/2/022010 PG 5 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749800063 ER PT S AU Crawford, M Dumitrescu, C Litvintsev, D Moibenko, A Oleynik, G AF Crawford, Matt Dumitrescu, Catalin Litvintsev, Dmitry Moibenko, Alexander Oleynik, Gene GP IOP TI Scalability and Performance Improvements in the Fermilab Mass Storage System SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB By 2009 the Fermilab Mass Storage System had encountered two major challenges: the required amount of data stored and accessed in both tiers of the system (dCache and Enstore) had significantly increased and the number of clients accessing Mass Storage System had increased from tens to hundreds of nodes and from hundreds to thousands of parallel requests. To address these challenges Enstore and the SRM part of dCache were modified to scale for performance, access rates, and capacity. This work increased the amount of simultaneously processed requests in a single Enstore Library instance from about 1000 to 30000. The rates of incoming requests to Enstore increased from tens to hundreds per second. Fermilab is invested in LTO4 tape technology and we have investigated both LTO5 and Oracle T10000C to cope with the increasing needs in capacity. We have decided to adopt T10000C, mainly due to its large capacity, which allows us to scale up the existing robotic storage space by a factor 6. This paper describes the modifications and investigations that allowed us to meet these scalability and performance challenges and provided some perspectives of Fermilab Mass Storage System. C1 [Crawford, Matt; Dumitrescu, Catalin; Litvintsev, Dmitry; Moibenko, Alexander; Oleynik, Gene] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Crawford, M (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM crawdad@fnal.gov; catalind@fnal.gov; litvinse@fnal.gov; moibenko@fnal.gov; oleynik@fnal.gov NR 5 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 052024 DI 10.1088/1742-6596/396/5/052024 PG 6 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749803015 ER PT S AU Dykstra, D AF Dykstra, Dave GP IOP TI Comparison of the Frontier Distributed Database Caching System to NoSQL Databases SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB One of the main attractions of non-relational "NoSQL" databases is their ability to scale to large numbers of readers, including readers spread over a wide area. The Frontier distributed database caching system, used in production by the Large Hadron Collider CMS and ATLAS detector projects for Conditions data, is based on traditional SQL databases but also adds high scalability and the ability to be distributed over a wide-area for an important subset of applications. This paper compares the major characteristics of the two different approaches and identifies the criteria for choosing which approach to prefer over the other. It also compares in some detail the NoSQL databases used by CMS and ATLAS: MongoDB, CouchDB, HBase, and Cassandra. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Dykstra, D (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. EM dwd@fnal.gov NR 8 TC 0 Z9 0 U1 1 U2 17 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 052031 DI 10.1088/1742-6596/396/5/052031 PG 9 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749803022 ER PT S AU Dykstra, D Garzoglio, G Kim, H Mhashilkar, P AF Dykstra, Dave Garzoglio, Gabriele Kim, Hyunwoo Mhashilkar, Parag GP IOP TI Identifying Gaps in Grid Middleware on Fast Networks with the Advanced Networking Initiative SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB As of 2012, a number of US Department of Energy (DOE) National Laboratories have access to a 100 Gb/s wide-area network backbone. The ESnet Advanced Networking Initiative (ANI) project is intended to develop a prototype network, based on emerging 100 Gb/s Ethernet technology. The ANI network will support DOE's science research programs. A 100 Gb/s network test bed is a key component of the ANI project. The test bed offers the opportunity for early evaluation of 100Gb/s network infrastructure for supporting the high impact data movement typical of science collaborations and experiments. In order to make effective use of this advanced infrastructure, the applications and middleware currently used by the distributed computing systems of large-scale science need to be adapted and tested within the new environment, with gaps in functionality identified and corrected. As a user of the ANI test bed, Fermilab aims to study the issues related to end-to-end integration and use of 100 Gb/s networks for the event simulation and analysis applications of physics experiments. In this paper we discuss our findings from evaluating existing HEP Physics middleware and application components, including GridFTP, Globus Online, etc. in the high-speed environment. These will include possible recommendations to the system administrators, application and middleware developers on changes that would make production use of the 100 Gb/s networks, including data storage, caching and wide area access. C1 [Dykstra, Dave; Garzoglio, Gabriele; Kim, Hyunwoo; Mhashilkar, Parag] Fermilab Natl Accelerator Lab, Div Comp Sci, Batavia, IL 60510 USA. RP Garzoglio, G (reprint author), Fermilab Natl Accelerator Lab, Div Comp Sci, Batavia, IL 60510 USA. EM dwd@fnal.gov; garzoglio@fnal.gov; hyunwoo@fnal.gov; parag@fnal.gov NR 10 TC 1 Z9 1 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 032034 DI 10.1088/1742-6596/396/3/032034 PG 13 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801047 ER PT S AU Fischler, M Green, C Kowalkowski, J Norman, A Paterno, M Rechenmacher, R AF Fischler, M. Green, C. Kowalkowski, J. Norman, A. Paterno, M. Rechenmacher, R. GP IOP TI NO upsilon A Event Building,Buffering and Data-Driven Triggering From Within theD AQ System SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The NO upsilon A experiment is along base line neutrino experiment design to make precision probes of the structure of neutrino mixing.The experiment features aunique dead time less data acquisition system that is capable acquiring and building an event dat a stream from the continuous readout of themore than 360,000 far detector channe ls. In order to achieve its physics goals the experiment must be able to buffer,correlate and extract the data in this stream with the beam-spills that occur that Fermilab.In addition the NO upsilon A experiment seeks to enhance its data collection efficiencies for rare class of event to pologies that are valuable for calibration through the use of data driven triggering. The NO upsilon aADDT is a proto type Data-Driven Triggering system. NO upsilon A-DDTh as been developed using the Fermilabartdaq generic DAQ/Event-building toolkit.This toolkit provides the advantages of sharing onlines of t ware infrastructure with other Intensity Frontier experiments, and of being able to use any o ine analysis module{unchanged{as a componen to f the online triggering decisions.We have measured the performance and over head of NO upsilon A-DDT framework using a Hough transform based trigger decision module developed for the NO upsilon A detector to identify cosmicrays.The results of these tests which were run on theNO upsilon A prototypenear detector, yielde damean processing time of 98 ms perevent,while consumingonly 1/16th of the available processing capacity.These results provide a proof of concept thata NO upsilon A-DDT based processing system is aviables trategy for data acquisition and triggering for the NO upsilon A far detector. C1 [Fischler, M.; Green, C.; Kowalkowski, J.; Norman, A.; Paterno, M.; Rechenmacher, R.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Fischler, M (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 012020 DI 10.1088/1742-6596/396/1/012020 PG 10 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749800020 ER PT S AU Gallas, EJ Albrand, S Fulachier, J Lambert, F Pachal, KE Tseng, JCL Zhang, Q AF Gallas, E. J. Albrand, S. Fulachier, J. Lambert, F. Pachal, K. E. Tseng, J. C. L. Zhang, Q. CA ATLAS Collaboration GP IOP TI Conditions and configuration metadata for the ATLAS experiment SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB In the ATLAS experiment, a system called COMA (Conditions/Configuration Metadata for ATLAS), has been developed to make globally important run-level metadata more readily accessible. It is based on a relational database storing directly extracted, refined, reduced, and derived information from system-specific database sources as well as information from non-database sources. This information facilitates a variety of unique dynamic interfaces and provides information to enhance the functionality of other systems. This presentation will give an overview of the components of the COMA system, enumerate its diverse data sources, and give examples of some of the interfaces it facilitates. We list important principles behind COMA schema and interface design, and how features of these principles create coherence and eliminate redundancy among the components of the overall system. In addition, we elucidate how interface logging data has been used to refine COMA content and improve the value and performance of end-user reports and browsers. C1 [Gallas, E. J.; Pachal, K. E.; Tseng, J. C. L.] Univ Oxford, Dept Phys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England. [Albrand, S.; Fulachier, J.; Lambert, F.] Univ Grenoble 1, CNRS IN2P3, Lab Phys Subatom Corpusculaire, INPG, F-38026 St Martin Dheres, France. [Zhang, Q.] Argonne Natl Lab, High Energy Phys Div, Argonne, IL 60439 USA. RP Gallas, EJ (reprint author), Univ Oxford, Dept Phys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England. EM gallas@cern.ch NR 7 TC 6 Z9 6 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 052033 DI 10.1088/1742-6596/396/5/052033 PG 13 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749803024 ER PT S AU Garzoglio, G AF Garzoglio, Gabriele GP IOP TI Investigation of Storage Options for Scientific Computing on Grid and Cloud Facilities SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB In recent years, several new storage technologies, such as Lustre, Hadoop, OrangeFS, and BlueArc, have emerged. While several groups have run benchmarks to characterize them under a variety of configurations, more work is needed to evaluate these technologies for the use cases of scientific computing on Grid clusters and Cloud facilities. This paper discusses our evaluation of the technologies as deployed on a test bed at FermiCloud, one of the Fermilab infrastructure-as-a-service Cloud facilities. The test bed consists of 4 server-class nodes with 40 TB of disk space and up to 50 virtual machine clients, some running on the storage server nodes themselves. With this configuration, the evaluation compares the performance of some of these technologies when deployed on virtual machines and on "bare metal" nodes. In addition to running standard benchmarks such as IOZone to check the sanity of our installation, we have run I/O intensive tests using physics-analysis applications. This paper presents how the storage solutions perform in a variety of realistic use cases of scientific computing. One interesting difference among the storage systems tested is found in a decrease in total read throughput with increasing number of client processes, which occurs in some implementations but not others. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Garzoglio, G (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM garzoglio@fnal.gov NR 3 TC 1 Z9 1 U1 0 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 042021 DI 10.1088/1742-6596/396/4/042021 PG 19 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749802051 ER PT S AU Garzoglio, G Levshina, T Rynge, M Sehgal, C Slyz, M AF Garzoglio, Gabriele Levshina, Tanya Rynge, Mats Sehgal, Chander Slyz, Marko GP IOP TI Supporting Shared Resource Usage for a Diverse User Community: the OSG Experience and Lessons Learned SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The Open Science Grid (OSG) supports a diverse community of new and existing users in adopting and making effective use of the Distributed High Throughput Computing (DHTC) model. The LHC user community has deep local support within the experiments. For other smaller communities and individual users the OSG provides consulting and technical services through the User Support area. We describe these sometimes successful and sometimes not so successful experiences and analyze lessons learned that are helping us improve our services. The services offered include forums to enable shared learning and mutual support, tutorials and documentation for new technology, and troubleshooting of problematic or systemic failure modes. For new communities and users, we bootstrap their use of the distributed high throughput computing technologies and resources available on the OSG by following a phased approach. We first adapt the application and run a small production campaign on a subset of "friendly" sites. Only then do we move the user to run full production campaigns across the many remote sites on the OSG, adding to the community resources up to hundreds of thousands of CPU hours per day. This scaling up generates new challenges like no determinism in the time to job completion, and diverse errors due to the heterogeneity of the configurations and environments so some attention is needed to get good results. We cover recent experiences with image simulation for the Large Synoptic Survey Telescope (LSST), small-file large volume data movement for the Dark Energy Survey (DES), civil engineering simulation with the Network for Earthquake Engineering Simulation (NEES), and accelerator modeling with the Electron Ion Collider group at BNL. We will categorize and analyze the use cases and describe how our processes are evolving based on lessons learned. C1 [Garzoglio, Gabriele; Levshina, Tanya; Sehgal, Chander; Slyz, Marko] Fermilab Natl Accelerator Lab, Comp Sect, POB 500, Batavia, IL 60510 USA. RP Garzoglio, G (reprint author), Fermilab Natl Accelerator Lab, Comp Sect, POB 500, Batavia, IL 60510 USA. EM garzoglio@fnal.gov; tlevshin@fnal.gov; rynge@isi.edu; cssehgal@fnal.gov; mslyz@fnal.gov NR 9 TC 1 Z9 1 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 032046 DI 10.1088/1742-6596/396/3/032046 PG 11 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801059 ER PT S AU Giffels, M Guo, Y Riley, D AF Giffels, M. Guo, Y. Riley, D. GP IOP TI Data Bookkeeping Service 3-A new event data catalog for CMS SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The Data Bookkeeping Service (DBS) provides an event data catalog for Monte Carlo and recorded data of the Compact Muon Solenoid (CMS) Experiment at the Large Hadron Collider (LHC) at CERN, Geneva. It contains all the necessary information used for tracking datasets, like their processing history and associations between runs, files and datasets, on a large scale of about 105 datasets and more than 107 files. The DBS is widely used within CMS, since all kind of data-processing like Monte Carlo production, processing of recorded event data as well as physics analysis done by the user, are relying on the information stored in DBS. C1 [Giffels, M.] CERN, PH CMG CO, CH-1211 Geneva 23, Switzerland. [Guo, Y.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. [Riley, D.] Cornell Univ, Ithaca, NY USA. RP Giffels, M (reprint author), CERN, PH CMG CO, CH-1211 Geneva 23, Switzerland. EM Manuel.Giffels@cern.ch; yuyi@fnal.gov; Daniel.Riley@cornell.edu NR 8 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 052036 DI 10.1088/1742-6596/396/5/052036 PG 5 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749803027 ER PT S AU Graf, NA AF Graf, Norman A. GP IOP TI Extra Dimensions: 3D in PDF Documentation SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB Experimental science is replete with multi-dimensional information which is often poorly represented by the two dimensions of presentation slides and print media. Past efforts to disseminate such information to a wider audience have failed for a number of reasons, including a lack of standards which are easy to implement and have broad support. Adobe's Portable Document Format (PDF) has in recent years become the de facto standard for secure, dependable electronic information exchange. It has done so by creating an open format, providing support for multiple platforms and being reliable and extensible. By providing support for the ECMA standard Universal 3D (U3D) and the ISO PRC file format in its free Adobe Reader software, Adobe has made it easy to distribute and interact with 3D content. Until recently, Adobe's Acrobat software was also capable of incorporating 3D content into PDF files from a variety of 3D file formats, including proprietary CAD formats. However, this functionality is no longer available in Acrobat X, having been spun off to a separate company. Incorporating 3D content now requires the additional purchase of a separate plug-in. In this talk we present alternatives based on open source libraries which allow the programmatic creation of 3D content in PDF format. While not providing the same level of access to CAD files as the commercial software, it does provide physicists with an alternative path to incorporate 3D content into PDF files from such disparate applications as detector geometries from Geant4, 3D data sets, mathematical surfaces or tesselated volumes. C1 SLAC, Menlo Pk, CA 94025 USA. RP Graf, NA (reprint author), SLAC, MS 71,2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. EM Norman.Graf@slac.stanford.edu NR 0 TC 0 Z9 0 U1 0 U2 8 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 022019 DI 10.1088/1742-6596/396/2/022019 PG 6 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749800072 ER PT S AU Graf, NA AF Graf, Norman A. GP IOP TI mesh2gdml SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ ID SIMULATION AB As particle detectors and physics analyses become more complex, the need for more detailed simulations of the detector response becomes increasingly important. Traditionally, two-dimensional engineering drawings have been interpreted by physicists who then implement approximations to the individual parts in software simulation packages. This process requires a high level of experience in both the abstraction of the physical volumes as well as the implementation in code, and is prone to error. mesh2gdml is a program which allows three-dimensional tesselated geometrical volumes to be converted into a format which the Geant4 simulation toolkit can import directly. This provides a pathway for simulating the response of detector elements which have been designed in CAD programs without having to write any code. C1 SLAC, Menlo Pk, CA 94025 USA. RP Graf, NA (reprint author), SLAC, MS 71,2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. EM Norman.Graf@slac.stanford.edu NR 3 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 022018 DI 10.1088/1742-6596/396/2/022018 PG 6 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749800071 ER PT S AU Grigoriev, M Demar, P Tierney, B Lake, A Metzger, J Frey, M Calyam, P AF Grigoriev, M. DeMar, P. Tierney, B. Lake, A. Metzger, J. Frey, M. Calyam, P. GP IOP TI E-Center: A Collaborative Platform for Wide Area Network Users SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The E-Center is a social collaborative web-based platform for assisting network users in understanding network conditions across network paths of interest to them. It is designed to give a user the necessary tools to isolate, identify, and resolve network performance-related problems. E-Center provides network path information on a link-by-link level, as well as from an end-to-end perspective. In addition to providing current and recent network path data, E-Center is intended to provide a social media environment for them to share issues, ideas, concerns, and problems. The product has a modular design that accommodates integration of other network services that make use of the same network path and performance data. C1 [Grigoriev, M.; DeMar, P.] Fermilab Natl Accelerator Lab, Core Comp Div, Batavia, IL 60510 USA. RP Grigoriev, M (reprint author), Fermilab Natl Accelerator Lab, Core Comp Div, Batavia, IL 60510 USA. EM maxim@fnal.gov; demar@fnal.gov; bltierney@es.net; andy@es.net; metzger@es.net; mfrey@bucknell.edu; pcalyam@osc.edu NR 5 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 042025 DI 10.1088/1742-6596/396/4/042025 PG 11 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749802055 ER PT S AU Grimm, K Guido, E Meloni, F Griso, SP Prokofiev, K Rudolph, M Wildauer, A AF Grimm, K. Guido, E. Meloni, F. Griso, S. Pagan Prokofiev, K. Rudolph, M. Wildauer, A. GP IOP TI Methods to quantify the performance of the primary vertex reconstruction in the ATLAS experiment under high luminosity conditions SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ ID INN AB Presented in this contribution are methods currently developed and used by the ATLAS collaboration to measure the performance of the primary vertex reconstruction algorithms. These methods quantify the amount of additional pile up interactions and help to identify the hard scattering process (the so called primary vertex) in the proton-proton collisions with high accuracy. The correct identification of the primary vertex and knowledge of the amount of pile up per bunch crossing is crucial for many physics analyses. With the increasing instantaneous luminosity at the LHC additional effects like splitting one vertex into many or reconstructing several pile up interactions as one become sizable effects. Statistical methods based on data and Monte Carlo simulation are applied to disentangle the different contributions. The mathematical methods, their software implementation and comparisons with independent luminosity measurements are presented. C1 [Grimm, K.] Univ Lancaster, Lancaster LA1 4YW, England. [Guido, E.] INFN, Milan, Italy. [Meloni, F.] Univ Milan, I-20122 Milan, Italy. [Griso, S. Pagan] Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. [Prokofiev, K.] NYU, New York, NY 10003 USA. [Rudolph, M.] Univ Toronto, Toronto, ON M5S 1A1, Canada. [Wildauer, A.] Max Planck Inst Phys & Astrophys, Munich, Germany. RP Grimm, K (reprint author), Univ Lancaster, Lancaster LA1 4YW, England. EM Kirill.Prokofiev@cern.ch OI Prokofiev, Kirill/0000-0002-2177-6401 NR 8 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 022041 DI 10.1088/1742-6596/396/2/022041 PG 8 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749800094 ER PT S AU Gysin, S Mandrichenko, I Podstavkov, V Vittone, M AF Gysin, Suzanne Mandrichenko, Igor Podstavkov, Vladimir Vittone, Margherita GP IOP TI Electronic Collaboration Logbook SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB In HEP, scientific research is performed by large collaborations of organizations and individuals. The logbook of a scientific collaboration is an important part of the collaboration record. Often it contains experimental data. At Fermi National Accelerator Laboratory (FNAL), we developed an Electronic Collaboration Logbook (ECL) application, which is used by about 20 different collaborations, experiments and groups at FNAL. The ECL is the latest iteration of the project formerly known as the Control Room Logbook (CRL). We have been working on mobile (IOS and Android) clients for the ECL. We will present the history, current status and future plans of the project, as well as design, implementation and support solutions made by the project. C1 [Gysin, Suzanne; Mandrichenko, Igor; Podstavkov, Vladimir; Vittone, Margherita] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Gysin, S (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 062014 DI 10.1088/1742-6596/396/6/062014 PG 6 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749803082 ER PT S AU Hategan, M McCauley, T Nguyen, P AF Hategan, M. McCauley, T. Nguyen, P. GP IOP TI A browser-based event display for the CMS experiment at the LHC SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The line between native and web applications is becoming increasingly blurred as modern web browsers are becoming powerful platforms on which applications can be run. Such applications are trivial to install and are readily extensible and easy to use. In an educational setting, web applications permit a way to deploy deploy tools in a highly-restrictive computing environment. The I2U2 collaboration has developed a browser-based event display for viewing events in data collected and released to the public by the CMS experiment at the LHC. The application itself reads a JSON event format and uses the JavaScript 3D rendering engine pre3d. The only requirement is a modern browser using HTML5 canvas. The event display has been used by thousands of high school students in the context of programs organized by I2U2, QuarkNet, and IPPOG. This browser-based approach to display of events can have broader usage and impact for experts and public alike. C1 [Hategan, M.] Univ Chicago, Chicago, IL 60637 USA. [McCauley, T.; Nguyen, P.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Hategan, M (reprint author), Univ Chicago, Chicago, IL 60637 USA. EM hategan@mcs.anl.gov; thomas.mccauley@cern.ch; phongn@fnal.gov FU US DOE; NSF FX We wish to acknowledge the collaboration and support of colleagues in I2U2, Quark Net, IPPOG and CMS. We also acknowledge the support of the US DOE and NSF. NR 0 TC 4 Z9 4 U1 1 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 022022 DI 10.1088/1742-6596/396/2/022022 PG 3 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749800075 ER PT S AU Hendrix, V Benjamin, D Yao, YS AF Hendrix, Val Benjamin, Doug Yao, Yushu GP IOP TI Scientific Cluster Deployment and Recovery - Using puppet to simplify cluster management SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB Deployment, maintenance and recovery of a scientific cluster, which has complex, specialized services, can be a time consuming task requiring the assistance of Linux system administrators, network engineers as well as domain experts. Universities and small institutions that have a part-time FTE with limited time for and knowledge of the administration of such clusters can be strained by such maintenance tasks. This current work is the result of an effort to maintain a data analysis cluster (DAC) with minimal effort by a local system administrator. The realized benefit is the scientist, who is the local system administrator, is able to focus on the data analysis instead of the intricacies of managing a cluster. Our work provides a cluster deployment and recovery process (CDRP) based on the puppet configuration engine allowing a part-time FTE to easily deploy and recover entire clusters with minimal effort. Puppet is a configuration management system (CMS) used widely in computing centers for the automatic management of resources. Domain experts use Puppet's declarative language to define reusable modules for service configuration and deployment. Our CDRP has three actors: domain experts, a cluster designer and a cluster manager. The domain experts first write the puppet modules for the cluster services. A cluster designer would then define a cluster. This includes the creation of cluster roles, mapping the services to those roles and determining the relationships between the services. Finally, a cluster manager would acquire the resources (machines, networking), enter the cluster input parameters (hostnames, IP addresses) and automatically generate deployment scripts used by puppet to configure it to act as a designated role. In the event of a machine failure, the originally generated deployment scripts along with puppet can be used to easily reconfigure a new machine. The cluster definition produced in our CDRP is an integral part of automating cluster deployment in a cloud environment. Our future cloud efforts will further build on this work. C1 [Hendrix, Val; Yao, Yushu] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. RP Hendrix, V (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 042027 DI 10.1088/1742-6596/396/4/042027 PG 9 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749802057 ER PT S AU Hollowell, C Pryor, J Smith, J AF Hollowell, Christopher Pryor, James Smith, Jason GP IOP TI Rebootless Linux Kernel Patching with Ksplice Uptrack at BNL SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB Ksplice/Oracle Uptrack is a software tool and update subscription service which allows system administrators to apply security and bug fix patches to the Linux kernel running on servers/workstations without rebooting them. The RHIC/ATLAS Computing Facility (RACF) at Brookhaven National Laboratory (BNL) has deployed Uptrack on nearly 2,000 hosts running Scientific Linux and Red Hat Enterprise Linux. The use of this software has minimized downtime, and increased our security posture. In this paper, we provide an overview of Ksplice's rebootless kernel patch creation/insertion mechanism, and our experiences with Uptrack. C1 [Hollowell, Christopher; Pryor, James; Smith, Jason] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Hollowell, C (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM hollowec@bnl.gov; pryor@bnl.gov; smithj4@bnl.gov NR 1 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 042028 DI 10.1088/1742-6596/396/4/042028 PG 4 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749802058 ER PT S AU Holmgren, D Seenu, N Simone, J Singh, A AF Holmgren, D. Seenu, N. Simone, J. Singh, A. GP IOP TI Fermilab multicore and GPU-accelerated clusters for lattice QCD SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB As part of the DOE LQCD-ext project, Fermilab designs, deploys, and operates dedicated high performance clusters for lattice QCD (LQCD) computations. We describe the design of these clusters, as well as their performance and the benchmarking processes that were used to select the hardware and the techniques used to handle their NUMA architecture. We discuss the design and performance of a GPU-accelerated cluster that Fermilab deployed in January 2012. On these clusters, the use of multicore processors with increasing numbers of cores has contributed to the steady decrease in price/performance for these calculations over the last decade. In the last several years, GPU acceleration has led to further decreases in price/performance for ported applications. C1 [Holmgren, D.; Seenu, N.; Simone, J.; Singh, A.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Holmgren, D (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM djholm@fnal.gov; nirmal@fnal.gov; simone@fnal.gov; amitoj@fnal.gov OI Simone, James/0000-0001-8515-3337; Holmgren, Donald/0000-0001-6701-7737 NR 6 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 042029 DI 10.1088/1742-6596/396/4/042029 PG 7 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749802059 ER PT S AU Huang, CH Lanciotti, E Magini, N Ratnikova, N Sanchez-Hernandez, A Serfon, C Wildish, T Zhang, X AF Huang, C-H Lanciotti, E. Magini, N. Ratnikova, N. Sanchez-Hernandez, A. Serfon, C. Wildish, T. Zhang, X. GP IOP TI Data Storage Accounting and Verification at LHC experiments SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB All major experiments at the Large Hadron Collider (LHC) need to measure real storage usage at the Grid sites. This information is equally important for resource management, planning, and operations. To verify the consistency of central catalogs, experiments are asking sites to provide a full list of the files they have on storage, including size, checksum, and other file attributes. Such storage dumps, provided at regular intervals, give a realistic view of the storage resource usage by the experiments. Regular monitoring of the space usage and data verification serve as additional internal checks of the system integrity and performance. Both the importance and the complexity of these tasks increase with the constant growth of the total data volumes during the active data taking period at the LHC. The use of common solutions helps to reduce the maintenance costs, both at the large Tier1 facilities supporting multiple virtual organizations and at the small sites that often lack manpower. We discuss requirements and solutions to the common tasks of data storage accounting and verification, and present experiment-specific strategies and implementations used within the LHC experiments according to their computing models. C1 [Huang, C-H] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Huang, CH (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. EM Natalia.Ratnikova@kit.edu NR 21 TC 2 Z9 2 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 032090 DI 10.1088/1742-6596/396/3/032090 PG 13 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801103 ER PT S AU Ito, H Potekhin, M Wenaus, T AF Ito, H. Potekhin, M. Wenaus, T. CA ATLAS Collaboration GP IOP TI Development of noSQL data storage for the ATLAS PanDA Monitoring System SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB For several years the PanDA Workload Management System has been the basis for distributed production and analysis for the ATLAS experiment at the LHC. Since the start of data taking PanDA usage has ramped up steadily, typically exceeding 500k completed jobs/day by June 2011. The associated monitoring data volume has been rising as well, to levels that present a new set of challenges in the areas of database scalability and monitoring system performance and efficiency. These challenges are being met with an R&D effort aimed at implementing a scalable and efficient monitoring data storage based on a noSQL solution (Cassandra). We present our motivations for using this technology, as well as data design and the techniques used for efficient indexing of the data. We also discuss the hardware requirements as they were determined by testing with actual data and realistic rate of queries. In conclusion, we present our experience with operating a Cassandra cluster over an extended period of time and with data load adequate for planned application. C1 [Ito, H.; Potekhin, M.; Wenaus, T.; ATLAS Collaboration] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Ito, H (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM potekhin@bnl.gov NR 4 TC 1 Z9 1 U1 0 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 052041 DI 10.1088/1742-6596/396/5/052041 PG 6 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749803032 ER PT S AU Jones, CD AF Jones, C. D. GP IOP TI Study of a Fine Grained Threaded Framework Design SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB Traditionally, HEP experiments exploit the multiple cores in a CPU by having each core process one event. However, future PC designs are expected to use CPUs which double the number of processing cores at the same rate as the cost of memory falls by a factor of two. This effectively means the amount of memory per processing core will remain constant. This is a major challenge for LHC processing frameworks since the LHC is expected to deliver more complex events (e. g. greater pileup events) in the coming years while the LHC experiment's frameworks are already memory constrained. Therefore in the not so distant future we may need to be able to efficiently use multiple cores to process one event. In this presentation we will discuss a design for an HEP processing framework which can allow very fine grained parallelization within one event as well as supporting processing multiple events simultaneously while minimizing the memory footprint of the job. The design is built around the libdispatch framework created by Apple Inc. (a port for Linux is available) whose central concept is the use of task queues. This design also accommodates the reality that not all code will be thread safe and therefore allows one to easily mark modules or sub parts of modules as being thread unsafe. In addition, the design efficiently handles the requirement that events in one run must all be processed before starting to process events from a different run. After explaining the design we will provide measurements from simulating different processing scenarios where the processing times used for the simulation are drawn from processing times measured from actual CMS event processing. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Jones, CD (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM cdj@fnal.gov NR 3 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 022027 DI 10.1088/1742-6596/396/2/022027 PG 11 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749800080 ER PT S AU Kutschke, RK AF kutschke, Robert K. GP IOP TI Offline Software for the Mu2e Experiment SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The Mu2e experiment at Fermilab is in the midst of its R\&D and approval processes. To aid and inform this process, a small team has developed an end-to-end Geant4-based simulation package and has developed reconstruction code that is already at the stage of an advanced prototype. Having these tools available at an early stage allows design options and tradeoffs to be studied using high level physics quantities. A key to the success of this effort has been, as much as possible, to acquire software and customize it, rather than to build it in-house. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Kutschke, RK (reprint author), Fermilab Natl Accelerator Lab, Mailstop 234,POB 500, Batavia, IL 60510 USA. EM kutschke@fnal.gov OI Kutschke, Robert/0000-0001-9315-2879 NR 7 TC 2 Z9 2 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 022028 DI 10.1088/1742-6596/396/2/022028 PG 8 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749800081 ER PT S AU Kuznetsov, V Evans, D Metson, S AF Kuznetsov, V. Evans, D. Metson, S. GP IOP TI Life in extra dimensions of database world or penetration of NoSQL in HEP community SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The recent buzzword in IT world is NoSQL. Major players, such as Facebook, Yahoo, Google, etc. are widely adopted different "NoSQL" solutions for their needs. Horizontal scalability, flexible data model and management of big data volumes are only a few advantages of NoSQL. In CMS experiment we use several of them in production environment. Here, we present CMS projects based on NoSQL solutions, their strengths and weaknesses as well as our experience with those tools and their coexistence with standard RDBMS solutions in our applications. C1 [Kuznetsov, V.] Cornell Univ, Ithaca, NY 14853 USA. [Evans, D.] Fermilab Natl Accelerator Lab, Batavia, IL USA. [Metson, S.] Univ Bristol, Bristol, Avon, England. RP Kuznetsov, V (reprint author), Cornell Univ, Ithaca, NY 14853 USA. EM vkuznet@gmail.com FU National Science Foundation [NSF-PHY-0970024]; Department of Energy of the United States of America FX This work was supported by the National Science Foundation, contract No. NSF-PHY-0970024, and the Department of Energy of the United States of America. NR 10 TC 0 Z9 0 U1 1 U2 11 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 052043 DI 10.1088/1742-6596/396/5/052043 PG 7 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749803034 ER PT S AU Lavrijsen, WTLP AF Lavrijsen, Wim T. L. P. GP IOP TI Optimizing python-based ROOT I/O with PyPy's tracing just-in-time compiler SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The Python programming language allows objects and classes to respond dynamically to the execution environment. Most of this, however, is made possible through language hooks which by definition can not be optimized and thus tend to be slow. The PyPy implementation of Python includes a tracing just in time compiler (JIT), which allows similar dynamic responses but at the interpreter-, rather than the application-level. Therefore, it is possible to fully remove the hooks, leaving only the dynamic response, in the optimization stage for hot loops, if the types of interest are opened up to the JIT. A general opening up of types to the JIT, based on reflection information, has already been developed (cppyy). The work described in this paper takes it one step further by customizing access to ROOT I/O to the JIT, allowing for fully automatic optimizations. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Lavrijsen, WTLP (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, 1 Cyclotron Rd,BLDG 50B3238, Berkeley, CA 94720 USA. EM WLavrijsen@lbl.gov NR 5 TC 2 Z9 2 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 052046 DI 10.1088/1742-6596/396/5/052046 PG 7 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749803037 ER PT S AU Litvintsev, D Moibenko, A Oleynik, G Zalokar, M AF Litvintsev, Dmitry Moibenko, Alexander Oleynik, Gene Zalokar, Michael GP IOP TI Enstore with Chimera namespace provider SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB Enstore is a mass storage system developed by Fermilab that provides distributed access and management of data stored on tapes. It uses a namespace service, PNFS, developed by DESY to provide a filesystem-like view of the stored data. PNFS is a legacy product and is being replaced by a new implementation, called Chimera, which is also developed by DESY. Chimera offers multiple advantages over PNFS in terms of performance and functionality. The Enstore client component, encp, has been modified to work with Chimera, as well as with any other namespace provider. We performed high load end-to-end acceptance test of Enstore with the Chimera namespace. This paper describes the modifications to Enstore, the test procedure and the results of the acceptance testing. C1 [Litvintsev, Dmitry; Moibenko, Alexander; Oleynik, Gene; Zalokar, Michael] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Litvintsev, D (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM litvinse@fnal.gov; moibenko@fnal.gov; oleynik@fnal.gov; zalokar@fnal.gov NR 4 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 052048 DI 10.1088/1742-6596/396/5/052048 PG 8 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749803039 ER PT S AU Lu, QM Biery, KA Kowalkowski, JB AF Lu, Qiming Biery, Kurt A. Kowalkowski, James B. GP IOP TI Message Correlation Analysis Tool for NO nu A SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB A complex running system, such as the NO nu A online data acquisition, consists of a large number of distributed but closely interacting components. This paper describes a generic real-time correlation analysis and event identification engine, named Message Analyzer. Its purpose is to capture run time abnormalities and recognize system failures based on log messages from participating components. The initial design of analysis engine is driven by the data acquisition (DAQ) of the NO nu A experiment. The Message Analyzer performs filtering and pattern recognition on the log messages and reacts to system failures identified by associated triggering rules. The tool helps the system maintain a healthy running state and to minimize data corruption. This paper also describes a domain specific language that allows the recognition patterns and correlation rules to be specified in a clear and flexible way. In addition, the engine provides a plugin mechanism for users to implement specialized patterns or rules in generic languages such as C++. C1 [Lu, Qiming; Biery, Kurt A.; Kowalkowski, James B.] Fermilab Natl Accelerator Lab, Div Comp Sci, Batavia, IL 60510 USA. RP Lu, QM (reprint author), Fermilab Natl Accelerator Lab, Div Comp Sci, POB 500, Batavia, IL 60510 USA. EM qlu@fnal.gov; biery@fnal.gov; jbk@fnal.gov NR 11 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 012030 DI 10.1088/1742-6596/396/1/012030 PG 11 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749800030 ER PT S AU Lukhanin, G Biery, K Foulkes, S Frank, M Hatzikoutelis, A Kowalkowski, J Paterno, M Rechenmacher, R AF Lukhanin, Gennadiy Biery, Kurt Foulkes, Stephen Frank, Martin Hatzikoutelis, Athanasios Kowalkowski, Jim Paterno, Marc Rechenmacher, Ron GP IOP TI Application of Control System Studio for the NOvA Detector Control System. SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB In the NOvA experiment, the Detector Controls System (DCS) provides a method for controlling and monitoring important detector hardware and environmental parameters. It is essential for operating the detector and is required to have access to roughly 370,000 independent programmable channels via more than 11,600 physical devices. In this paper, we demonstrate an application of Control System Studio (CSS), developed by Oak Ridge National Laboratory, for the NOvA experiment. The application of CSS for the DCS of the NOvA experiment has been divided into three phases: (1) user requirements and concept prototype on a test-stand, (2) small scale deployment at the prototype Near Detector on the Surface, and (3) a larger scale deployment at the Far Detector. We also give an outline of the CSS integration with the NOvA online software and the alarm handling logic for the Front-End electronics. C1 [Lukhanin, Gennadiy; Biery, Kurt; Foulkes, Stephen; Kowalkowski, Jim; Paterno, Marc; Rechenmacher, Ron] Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. RP Lukhanin, G (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM lukhanin@fnal.gov; biery@fnal.gov; sfoulkes@fnal.gov; mfrank@fnal.gov; athansh@fnal.gov; jbk@fnal.gov; paterno@fnal.gov; ron@fnal.gov FU National Accelerator Laboratory is operated by Fermi Research Alliance, LLC [De-AC02-07CH11359]; United States Department of Energy [FERMILAB-CONF-12-292-CD] FX The Fermi National Accelerator Laboratory is operated by Fermi Research Alliance, LLC under Contract No. De-AC02-07CH11359 with the United States Department of Energy. This contribution is FERMILAB-CONF-12-292-CD. NR 4 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 062012 DI 10.1088/1742-6596/396/6/062012 PG 6 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749803080 ER PT S AU Lyon, AL Illingworth, RA Mengel, M Norman, AJ AF Lyon, Adam L. Illingworth, Robert A. Mengel, Marc Norman, Andrew J. GP IOP TI Taking Global Scale Data Handling to the Fermi lab Intensity Frontier SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB SAM is a comprehensive data management system used by the Tevatron Run II experiments with great success. The newest experiments at Fermi lab, the Intensity Frontier experiments, are currently lacking such a system. In these proceedings, the advantages of using SAM for these experiments is discussed. Two improvements to SAM, namely SAMWeb and SAMfs are described. These improvements will make SAM much easier to integrate, deploy, maintain, and use. C1 [Lyon, Adam L.; Illingworth, Robert A.; Mengel, Marc; Norman, Andrew J.] Fermilab Natl Accelerator Lab, Data Handling Grp, Running Expt Dept, Div Comp Sci, Batavia, IL 60510 USA. RP Lyon, AL (reprint author), Fermilab Natl Accelerator Lab, Data Handling Grp, Running Expt Dept, Div Comp Sci, POB 500, Batavia, IL 60510 USA. EM lyon@fnal.gov OI Norman, Andrew/0000-0001-8572-956X NR 2 TC 5 Z9 5 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 032069 DI 10.1088/1742-6596/396/3/032069 PG 9 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801082 ER PT S AU Lyon, AL AF Lyon, Adam L. GP IOP TI Event Processing Track Summary for CHEP 2012 SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB A general perspective of the CHEP 2012 Event Processing track is given, and some predictions for the future are offered. C1 Fermilab Natl Accelerator Lab, Div Comp Sci, Batavia, IL 60510 USA. RP Lyon, AL (reprint author), Fermilab Natl Accelerator Lab, Div Comp Sci, POB 500, Batavia, IL 60510 USA. EM lyon@fnal.gov NR 5 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 022032 DI 10.1088/1742-6596/396/2/022032 PG 4 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749800085 ER PT S AU Maeno, T De, K Wenaus, T Nilsson, P Walker, R Stradling, A Fine, V Potekhin, M Panitkin, S Compostella, G AF Maeno, T. De, K. Wenaus, T. Nilsson, P. Walker, R. Stradling, A. Fine, V. Potekhin, M. Panitkin, S. Compostella, G. CA ATLAS Collaboration GP IOP TI Evolution of the ATLAS PanDA Production and Distributed Analysis System SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The PanDA (Production and Distributed Analysis) system has been developed to meet ATLAS production and analysis requirements for a data-driven workload management system capable of operating at LHC data processing scale. PanDA has performed well with high reliability and robustness during the two years of LHC data-taking, while being actively evolved to meet the rapidly changing requirements for analysis use cases. We will present an overview of system evolution including automatic rebrokerage and reattempt for analysis jobs, adaptation for the CernVM File System, support for the multi-cloud model through which Tier-2 sites act as members of multiple clouds, pledged resource management and preferential brokerage, and monitoring improvements. We will also describe results from the analysis of two years of PanDA usage statistics, current issues, and plans for the future. C1 [Maeno, T.; Wenaus, T.; Fine, V.; Potekhin, M.; Panitkin, S.] Brookhaven Natl Lab, Upton, NY 11973 USA. [De, K.; Nilsson, P.; Stradling, A.] Univ Texas Arlington, Arlington, TX USA. [Walker, R.] Univ Munich, Munich, Germany. [Compostella, G.] Max Planck Inst Phys & Astrophys, Munich, Germany. RP Maeno, T (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM tmaeno@bnl.gov NR 11 TC 11 Z9 11 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 032071 DI 10.1088/1742-6596/396/3/032071 PG 7 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801084 ER PT S AU Maeno, T De, K Panitkin, S AF Maeno, T. De, K. Panitkin, S. CA ATLAS Collaboration GP IOP TI PD2P: PanDA Dynamic Data Placement for ATLAS SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The PanDA (Production and Distributed Analysis) system plays a key role in the ATLAS distributed computing infrastructure. PanDA is the ATLAS workload management system for processing all Monte-Carlo (MC) simulation and data reprocessing jobs in addition to user and group analysis jobs. The PanDA Dynamic Data Placement (PD2P) system has been developed to cope with difficulties of data placement for ATLAS. We will describe the design of the new system, its performance during the past year of data taking, dramatic improvements it has brought about in the efficient use of storage and processing resources, and plans for the future. C1 [Maeno, T.; Panitkin, S.] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Maeno, T (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM tmaeno@bnl.gov NR 8 TC 3 Z9 3 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 032070 DI 10.1088/1742-6596/396/3/032070 PG 7 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801083 ER PT S AU Malon, D Cranshaw, J Zhang, Q AF Malon, D. Cranshaw, J. Zhang, Q. CA ATLAS Collaboration GP IOP TI An extensible infrastructure for querying and mining event-level metadata in ATLAS SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The ATLAS event-level metadata infrastructure supports applications that range from data quality monitoring, anomaly detection, and fast physics monitoring to event-level selection and navigation to file-resident event data at any processing stage, from raw through analysis object data, in globally distributed analysis. A central component of the infrastructure is a distributed TAG database, which contains event-level metadata records for all ATLAS events, real and simulated. This resource offers a unique global view of ATLAS data, and provides an opportunity, not only for stream-style mining of event data, but also for an examination of data across streams, across runs, and across (re) processings. The TAG database serves as a natural locus for run-level and processing-level integrity checks, for investigations of event duplication and other issues in the trigger and offline systems, for questions about stream overlap, for queries about interesting but out-of-stream events, for statistics, and more. In early ATLAS running, such database queries were largely ad hoc, and were handled manually. In this paper, we describe an extensible infrastructure for addressing these and other use cases during upload and post-upload processing, and discuss some of the uses to which this infrastructure has been applied. C1 [Malon, D.; Cranshaw, J.; Zhang, Q.] Argonne Natl Lab, Argonne, IL 60439 USA. RP Malon, D (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM malon@anl.gov; cranshaw@anl.gov; qzhang@anl.gov NR 8 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 052053 DI 10.1088/1742-6596/396/5/052053 PG 5 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749803044 ER PT S AU Malon, D Albrand, S Gallas, E Stewart, G AF Malon, D. Albrand, S. Gallas, E. Stewart, G. CA ATLAS Collaboration GP IOP TI A programmatic view of metadata, metadata services, and metadata flow in ATLAS SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The volume and diversity of metadata in an experiment of the size and scope of ATLAS are considerable. Even the definition of metadata may seem context-dependent: data that are primary for one purpose may be metadata for another. ATLAS metadata services must integrate and federate information from inhomogeneous sources and repositories, map metadata about logical or physics constructs to deployment and production constructs, provide a means to associate metadata at one level of granularity with processing or decision-making at another, offer a coherent and integrated view to physicists, and support both human use and programmatic access. In this paper we consider ATLAS metadata, metadata services, and metadata flow principally from the illustrative perspective of how disparate metadata are made available to executing jobs and, conversely, how metadata generated by such jobs are returned. We describe how metadata are read, how metadata are cached, and how metadata generated by jobs and the tasks of which they are a part are communicated, associated with data products, and preserved. We also discuss the principles that guide decision-making about metadata storage, replication, and access. C1 [Malon, D.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Albrand, S.] Univ Grenoble 1, CNRS, IN2P3, INPG,Lab Phys Subatom Corpusculaire, F-38026 Grenoble, France. [Gallas, E.] Univ Oxford, Dept Phys, Oxford, England. [Stewart, G.] CERN, Geneva, Switzerland. RP Malon, D (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM malon@anl.gov FU U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357] FX Argonne National Laboratory's work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under contract DE-AC02-06CH11357. NR 13 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 052052 DI 10.1088/1742-6596/396/5/052052 PG 6 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749803043 ER PT S AU Megino, FHB Benjamin, D De, K Gable, I Hendrix, V Panitkin, S Paterson, M De Silva, A van der Ster, D Taylor, R Vitillo, RA Walker, R AF Megino, Fernando Harald Barreiro Benjamin, Doug De, Kaushik Gable, Ian Hendrix, Val Panitkin, Sergey Paterson, Michael De Silva, Asoka van der Ster, Daniel Taylor, Ryan Vitillo, Roberto A. Walker, Rod CA ATLAS Collaboration GP IOP TI Exploiting Virtualization and Cloud Computing in ATLAS SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The ATLAS Computing Model was designed around the concept of grid computing; since the start of data-taking, this model has proven very successful in the federated operation of more than one hundred Worldwide LHC Computing Grid (WLCG) sites for offline data distribution, storage, processing and analysis. However, new paradigms in computing, namely virtualization and cloud computing, present improved strategies for managing and provisioning IT resources that could allow ATLAS to more flexibly adapt and scale its storage and processing workloads on varied underlying resources. In particular, ATLAS is developing a "grid-of-clouds" infrastructure in order to utilize WLCG sites that make resources available via a cloud API. This work will present the current status of the Virtualization and Cloud Computing R&D project in ATLAS Distributed Computing. First, strategies for deploying PanDA queues on cloud sites will be discussed, including the introduction of a "cloud factory" for managing cloud VM instances. Next, performance results when running on virtualized/cloud resources at CERN LxCloud, StratusLab, and elsewhere will be presented. Finally, we will present the ATLAS strategies for exploiting cloud-based storage, including remote XROOTD access to input data, management of EC2-based files, and the deployment of cloud-resident LCG storage elements. C1 [Megino, Fernando Harald Barreiro; van der Ster, Daniel] CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland. [Benjamin, Doug] Duke Univ, Durham, NC 27708 USA. [De, Kaushik] Univ Texas Arlington, Arlington, TX USA. [Gable, Ian; Paterson, Michael; Taylor, Ryan] Univ Victoria, Victoria, BC V8W 2Y2, Canada. [Hendrix, Val; Vitillo, Roberto A.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. [Panitkin, Sergey] Brookhaven Natl Lab, Upton, NY USA. [De Silva, Asoka] TRIUMF, Vancouver, BC, Canada. [Walker, Rod] Univ Munich, Munich, Germany. RP Megino, FHB (reprint author), CERN, European Org Nucl Res, CH-1211 Geneva, Switzerland. NR 11 TC 6 Z9 6 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 032011 DI 10.1088/1742-6596/396/3/032011 PG 12 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801024 ER PT S AU Mhashilkar, P Miller, Z Kettimuthu, R Garzoglio, G Holzman, B Weiss, C Duan, X Lacinski, L AF Mhashilkar, Parag Miller, Zachary Kettimuthu, Rajkumar Garzoglio, Gabriele Holzman, Burt Weiss, Cathrin Duan, Xi Lacinski, Lukasz GP IOP TI End-To-End Solution for Integrated Workload and Data Management using GlideinWMS and Globus Online SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB Grid computing has enabled scientific communities to effectively share computing resources distributed over many independent sites. Several such communities, or Virtual Organizations (VO), in the Open Science Grid and the European Grid Infrastructure use the GlideinWMS system to run complex application work-flows. GlideinWMS is a pilot-based workload management system (AVMS) that creates an on-demand, dynamically-sized overlay Condor batch system on Grid resources. While the WMS addresses the management of compute resources, however, data management in the Grid is still the responsibility of the VO. In general, large VOs have resources to develop complex custom solutions, while small VOs would rather push this responsibility to the infrastructure. The latter requires a tight integration of the WMS and the data management layers, an approach still not common in modern Grids. In this paper we describe a solution developed to address this shortcoming in the context of Center for Enabling Distributed Peta-scale Science (CEDPS) by integrating GlideinWMS with Globus Online (GO). Globus Online is a fast, reliable file transfer service that makes it easy for any user to move data. The solution eliminates the need for the users to provide custom data transfer solutions in the application by making this functionality part of the GlideinWMS infrastructure. To achieve this, GlideinWMS uses the file transfer plug-in architecture of Condor. The paper describes the system architecture and how this solution can be extended to support data transfer services other than Globus Online when used with Condor or GlideinWMS. C1 [Mhashilkar, Parag; Garzoglio, Gabriele; Holzman, Burt] Fermilab Natl Accelerator Lab, Div Comp Sci, Batavia, IL 60563 USA. [Kettimuthu, Rajkumar] Argonne Natl Lab, Math & Comp Sci Div, Chicago, IL 60637 USA. [Kettimuthu, Rajkumar; Lacinski, Lukasz] Univ Chicago, Computat Inst, Argonne Natl Lab, Chicago, IL 60637 USA. [Miller, Zachary; Weiss, Cathrin] Univ Wisconsin, Dept Comp Sci, Madison, WI 53706 USA. [Duan, Xi] Illinois Inst Technol, IIT Coll Sci & Letter, Chicago, IL 60616 USA. RP Mhashilkar, P (reprint author), Fermilab Natl Accelerator Lab, Div Comp Sci, Batavia, IL 60563 USA. EM parag@fnal.gov; zmiller@cs.wisc.edu; kettimut@mcs.anl.gov; garzogli@fnal.gov; burt@fnal.gov; cweiss@cs.wisc.edu; xduan@iit.edu; lukasz@ci.uchicago.edu OI Holzman, Burt/0000-0001-5235-6314 NR 5 TC 2 Z9 2 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 032076 DI 10.1088/1742-6596/396/3/032076 PG 9 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801089 ER PT S AU Millar, AP Baranova, T Behrmann, G Bernardt, C Fuhrmann, P Litvintsev, DO Mkrtchyan, T Petersen, A Rossi, A Schwank, K AF Millar, A. P. Baranova, T. Behrmann, G. Bernardt, C. Fuhrmann, P. Litvintsev, D. O. Mkrtchyan, T. Petersen, A. Rossi, A. Schwank, K. GP IOP TI dCache, agile adoption of storage technology SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB For over a decade, dCache has been synonymous with large-capacity, fault-tolerant storage using commodity hardware that supports seamless data migration to and from tape. In this paper we provide some recent news of changes within dCache and the community surrounding it. We describe the flexible nature of dCache that allows both externally developed enhancements to dCache facilities and the adoption of new technologies. Finally, we present information about avenues the dCache team is exploring for possible future improvements in dCache. C1 [Millar, A. P.; Baranova, T.; Bernardt, C.; Fuhrmann, P.; Mkrtchyan, T.; Petersen, A.; Schwank, K.] DESY, IT Dept, Notkestr 85, Hamburg, Germany. [Behrmann, G.] NORDUnet, Copenhagen, Denmark. [Litvintsev, D. O.; Rossi, A.] Fermilab Natl Accelerator Lab, Chicago, IL USA. RP Millar, AP (reprint author), DESY, IT Dept, Notkestr 85, Hamburg, Germany. EM paul.millar@desy.de NR 10 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 032077 DI 10.1088/1742-6596/396/3/032077 PG 11 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801090 ER PT S AU Morrison, D Sourikova, I AF Morrison, Dave Sourikova, Irina GP IOP TI Improving PHENIX search with Solr, Nutch and Drupal. SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB During its 20 years of R&D, construction and operation the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) has accumulated large amounts of proprietary collaboration data that is hosted on many servers around the world and is not open for commercial search engines for indexing and searching. The legacy search infrastructure did not scale well with the fast growing PHENIX document base and produced results inadequate in both precision and recall. After considering the possible alternatives that would provide an aggregated, fast, full text search of a variety of data sources and file formats we decided to use Nutch [1] as a web crawler and Solr [2] as a search engine. To present XML-based Solr search results in a user-friendly format we use Drupal [3] as a web interface to Solr. We describe the experience of building a federated search for a heterogeneous collection of 10 million PHENIX documents with Nutch, Solr and Drupal. C1 [Morrison, Dave; Sourikova, Irina] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Morrison, D (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM dave@bnl.gov; irina@bnl.gov NR 0 TC 0 Z9 0 U1 0 U2 7 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 062017 DI 10.1088/1742-6596/396/6/062017 PG 4 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749803085 ER PT S AU Nilsson, P Bejar, JC Compostella, G Contreras, C De, K Dos Santos, T Maeno, T Potekhin, M Wenaus, T AF Nilsson, P. Bejar, J. Caballero Compostella, G. Contreras, C. De, K. Dos Santos, T. Maeno, T. Potekhin, M. Wenaus, T. CA ATLAS Collaboration GP IOP TI Recent Improvements in the ATLAS PanDA Pilot SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The Production and Distributed Analysis system (PanDA) in the ATLAS experiment uses pilots to execute submitted jobs on the worker nodes. The pilots are designed to deal with different runtime conditions and failure scenarios, and support many storage systems. This talk will give a brief overview of the PanDA pilot system and will present major features and recent improvements including CernVM File System integration, the job retry mechanism, advanced job monitoring including JEM technology, and validation of new pilot code using the Hammer Cloud stress-testing system. PanDA is used for all ATLAS distributed production and is the primary system for distributed analysis. It is currently used at over 130 sites worldwide. We analyze the performance of the pilot system in processing LHC data on the OSG. EGI and Nordugrid infrastructures used by ATLAS, and describe plans for its further evolution. C1 [Nilsson, P.; De, K.] Univ Texas Arlington, Arlington, TX 76019 USA. [Bejar, J. Caballero; Maeno, T.; Potekhin, M.; Wenaus, T.] Brookhaven Natl Lab, Upton, NY USA. [Compostella, G.] Max Planck Inst Phys & Astrophys, Munich, Germany. [Contreras, C.] Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso, Chile. [Dos Santos, T.] Univ Berg, Wuppertal, Germany. RP Nilsson, P (reprint author), Univ Texas Arlington, Arlington, TX 76019 USA. EM paul.nilsson@cern.ch NR 8 TC 0 Z9 0 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 032080 DI 10.1088/1742-6596/396/3/032080 PG 7 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801093 ER PT S AU Norman, A Kwarciany, R Deuerling, G Wilcer, N AF Norman, A. Kwarciany, R. Deuerling, G. Wilcer, N. GP IOP TI The NO nu A Timing System: A system for synchronizing a long baseline neutrino experiment SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The NO nu A experiment is designed to measure key parameters in neutrino physics related to the neutrino mass hierarchy and the asymmetry between matter and anti-matter. To make these measurements the NO nu A experiment must correlate the extraction of beam to the NuMI target with individual hits in both a near detector and a far detector located 810 km from Fermi lab. Precisely correlating hits across these detectors and reconstructing particle trajectories require that all of the readout electronics be precisely synchronized to an absolute wall time with a channel to channel variation less than 15.6 ns. The NO nu A Timing Distribution System accomplishes this through an integration of commercial GPS receiver technology and custom electronics. This paper describes the timing system, its component hardware and the synchronization method that is employed by it. C1 [Norman, A.; Kwarciany, R.; Deuerling, G.; Wilcer, N.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Norman, A (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM anorman@fnal.gov NR 2 TC 5 Z9 5 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 012034 DI 10.1088/1742-6596/396/1/012034 PG 12 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749800034 ER PT S AU Norman, A AF Norman, A. GP IOP TI The NO nu A Data Acquisition System SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The NO nu A experiment is a long baseline neutrino experiment designed to make key measures to determine the neutrino mass hierarchy, neutrino mixing and CP violation in the neutrino sector. In order to make these measurements the NO nu A collaboration has designed a highly distributed, synchronized, continuous digitization and readout system that is able to acquire and correlate data from the Fermi lab accelerator complex, the NO nu A near detector at Fermi lab and the NO nu A far detector which is located 810 km away at Ash River, MN. This system has unique properties that let it fully exploit the physics capabilities of the NO nu A detector. This paper discusses the design of the NO nu A DAQ system and its capabilities. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Norman, A (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM anorman@fnal.gov NR 0 TC 1 Z9 1 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 012035 DI 10.1088/1742-6596/396/1/012035 PG 11 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749800035 ER PT S AU Panitkin, S Fine, V Wenaus, T AF Panitkin, Sergey Fine, Valery Wenaus, Torre CA ATLAS Collaboration GP IOP TI A Study of ATLAS Grid Performance for Distributed Analysis SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB In the past two years the ATLAS Collaboration at the LHC has collected a large volume of data and published a number of ground breaking papers. The Grid-based ATLAS distributed computing infrastructure played a crucial role in enabling timely analysis of the data. We will present a study of the performance and usage of the ATLAS Grid as platform for physics analysis in 2011. This includes studies of general properties as well as timing properties of user jobs (wait time, run time, etc). These studies are based on mining of data archived by the PanDA workload management system. C1 [Panitkin, Sergey; Fine, Valery; Wenaus, Torre] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Panitkin, S (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 032085 DI 10.1088/1742-6596/396/3/032085 PG 6 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801098 ER PT S AU Ryu, S Wakefield, S AF Ryu, S. Wakefield, S. GP IOP TI The WorkQueue project - a task queue for the CMS workload management system SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB We present the development and first experience of a new component (termed WorkQueue) in the CMS workload management system. This component provides a link between a global request system (Request Manager) and agents (WMAgents) which process requests at compute and storage resources (known as sites). These requests typically consist of creation or processing of a data sample (possibly terabytes in size). Unlike the standard concept of a task queue, the WorkQueue does not contain fully resolved work units (known typically as jobs in HEP). This would require the WorkQueue to run computationally heavy algorithms that are better suited to run in the WMAgents. Instead the request specifies an algorithm that the WorkQueue uses to split the request into reasonable size chunks (known as elements). An advantage of performing lazy evaluation of an element is that expanding datasets can be accommodated by having job details resolved as late as possible. The WorkQueue architecture consists of a global WorkQueue which obtains requests from the request system, expands them and forms an element ordering based on the request priority. Each WMAgent contains a local WorkQueue which buffers work close to the agent, this overcomes temporary unavailability of the global WorkQueue and reduces latency for an agent to begin processing. Elements are pulled from the global WorkQueue to the local WorkQueue and into the WMAgent based on the estimate of the amount of work within the element and the resources available to the agent. WorkQueue is based on CouchDB, a document oriented NoSQL database. The WorkQueue uses the features of CouchDB (map/reduce views and bi-directional replication between distributed instances) to provide a scalable distributed system for managing large queues of work. The project described here represents an improvement over the old approach to workload management in CMS which involved individual operators feeding requests into agents. This new approach allows for a system where individual WMAgents are transient and can be added or removed from the system as needed. C1 [Ryu, S.; Wakefield, S.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Ryu, S (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM stuart.wakefield@imperial.ac.uk NR 3 TC 1 Z9 1 U1 0 U2 4 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 032114 DI 10.1088/1742-6596/396/3/032114 PG 5 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749802023 ER PT S AU Smith, JA De Stefano, JS Fetzko, J Hollowell, C Ito, H Karasawa, M Pryor, J Rao, T Strecker-Kellogg, W AF Smith, Jason A. De Stefano, John S., Jr. Fetzko, John Hollowell, Christopher Ito, Hironori Karasawa, Mizuki Pryor, James Rao, Tejas Strecker-Kellogg, William GP IOP TI Centralized Fabric Management Using Puppet, Git, and GLPI SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB Managing the infrastmcture of a large and complex data center can be extremely difficult without taking advantage of recent technological advances in administrative automation Puppet is a seasoned open-source tool that is designed for enterprise class centralized configuration management. At the RHIC and ATLAS Computing Facility (RACF) at Brookhaven National Laboratory, we use Puppet along with Git, GLPI, and some custom scripts as part of our centralized configuration management system. In this paper, we discuss how we use these tools for centralized configuration management of our servers and services, change management requiring authorized approval of production changes, a complete version controlled history of all changes made, separation of production, testing and development systems using puppet environments, semi-automated server inventory using GLPI, and configuration change monitoring and reporting using the Puppet dashboard. We will also discuss scalability and performance results from using these tools on a 2,000+ node cluster and 400+ infrastructure servers with an administrative staff of approximately 25 full-time employees (FTEs). C1 [Smith, Jason A.; De Stefano, John S., Jr.; Fetzko, John; Hollowell, Christopher; Ito, Hironori; Karasawa, Mizuki; Pryor, James; Rao, Tejas; Strecker-Kellogg, William] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Smith, JA (reprint author), Brookhaven Natl Lab, POB 5000, Upton, NY 11973 USA. EM smithj4@bnl.gov; jd@bnl.gov; jfetzko@bnl.gov; hollowec@bnl.gov; hito@bnl.gov; mizuki@bnl.gov; pryor@bnl.gov; raot@bnl.gov; willsk@bnl.gov NR 1 TC 1 Z9 1 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 042056 DI 10.1088/1742-6596/396/4/042056 PG 6 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749802086 ER PT S AU Snyder, S Krasznahorkay, A AF Snyder, Scott Krasznahorkay, Attila CA ATLAS Collaboration GP IOP TI Toolkit for data reduction to tuples for the ATLAS experiment SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The final step in a HEP data-processing chain is usually to reduce the data to a 'tuple' form which can be efficiently read by interactive analysis tools such as ROOT. Often, this is implemented independently by each group analyzing the data, leading to duplicated effort and needless divergence in the format of the reduced data. ATLAS has implemented a common toolkit for performing this processing step. By using tools from this package, physics analysis groups can produce tuples customized for a particular analysis but which are still consistent in format and vocabulary with those produced by other physics groups. The package is designed so that almost all the code is independent of the specific form used to store the tuple. The code that does depend on this is grouped into a set of small backend packages. While the ROOT backend is the most used, backends also exist for HDF5 and for specialized databases. By now, the majority of ATLAS analyses rely on this package, and it is an important contributor to the ability of ATLAS to rapidly analyze physics data. C1 [Snyder, Scott] Brookhaven Natl Lab, Upton, NY 11973 USA. [Krasznahorkay, Attila; ATLAS Collaboration] New York Univ, Dept Phys, New York, NY 10003 USA. RP Snyder, S (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM snyder@bnl.gov FU U.S. Department of Energy [DE-ACO298CH10886]; Brookhaven National Laboratory FX This work is supported in part by the U.S. Department of Energy under contract DE-ACO298CH10886 with Brookhaven National Laboratory. NR 5 TC 1 Z9 1 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 022047 DI 10.1088/1742-6596/396/2/022047 PG 14 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749800100 ER PT S AU Strecker-Kellogg, W Caramarcu, C Hollowell, C Wong, T AF Strecker-Kellogg, W. Caramarcu, C. Hollowell, C. Wong, T. GP IOP TI Simplified Virtualization in a HEP/NP Environment with Condor SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB In this work we will address the development of a simple prototype virtualized worker node cluster, using Scientific Linux 6.x as a base OS, KVM and the libvirt API for virtualization, and the Condor batch software to manage virtual machines. The discussion in this paper provides details on our experience with building, configuring, and deploying the various components from bare metal, including the base OS, creation and distribution of the virtualized OS images and the integration of batch services with the virtual machines. Our focus was on simplicity and interoperability with our existing architecture. C1 [Strecker-Kellogg, W.; Caramarcu, C.; Hollowell, C.; Wong, T.] Brookhaven Natl Lab, RHIC ATLAS Comp Facil, New York, NY USA. RP Strecker-Kellogg, W (reprint author), Brookhaven Natl Lab, RHIC ATLAS Comp Facil, New York, NY USA. EM willsk@bnl.gov NR 3 TC 0 Z9 0 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 042057 DI 10.1088/1742-6596/396/4/042057 PG 5 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749802087 ER PT S AU Undrus, A AF Undrus, A. CA ATLAS Collaboration GP IOP TI Evolution of the ATLAS Nightly Build System SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB The ATLAS Nightly Build System is a major component in the ATLAS collaborative software organization, validation, and code approval scheme. For over 10 years of development it has evolved into a factory for automatic release production and grid distribution. The 50 multi-platform branches of ATLAS releases provide vast opportunities for testing new packages, verification of patches to existing software, and migration to new platforms and compilers for ATLAS code that currently contains 2200 packages with 4 million C++ and 1.4 million python scripting lines written by about 1000 developers. Recent development was focused on the integration of ATLAS Nightly Build and Installation systems. The nightly releases are distributed and validated and some are transformed into stable releases used for data processing worldwide. The ATLAS Nightly System is managed by the NICOS control tool on a computing farm with 50 powerful multiprocessor nodes. NICOS provides the fully automated framework for the release builds, testing, and creation of distribution kits. The ATN testing framework of the Nightly System runs unit and integration tests in parallel suites, fully utilizing the resources of multi-core machines, and provides the first results even before compilations complete. The NICOS error detection system is based on several techniques and classifies the compilation and test errors according to their severity. It is periodically tuned to place greater emphasis on certain software defects by highlighting the problems on NICOS web pages and sending automatic e-mail notifications to responsible developers. These and other recent developments will be presented and future plans will be described. C1 [Undrus, A.; ATLAS Collaboration] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Undrus, A (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM undrus@bnl.gov NR 16 TC 2 Z9 2 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 052070 DI 10.1088/1742-6596/396/5/052070 PG 8 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749803061 ER PT S AU van Gemmeren, P Binet, S Calafiura, P Lavrijsen, W Malon, D Tsulaia, V AF van Gemmeren, P. Binet, S. Calafiura, P. Lavrijsen, W. Malon, D. Tsulaia, V. CA ATLAS Collaboration GP IOP TI I/O Strategies for Multicore Processing in ATLAS SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab, ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB A critical component of any multicore/manycore application architecture is the handling of input and output. Even in the simplest of models, design decisions interact both in obvious and in subtle ways with persistence strategies. When multiple workers handle I/O independently using distinct instances of a serial I/O framework, for example, it may happen that because of the way data from consecutive events are compressed together, there may be serious inefficiencies, with workers redundantly reading the same buffers, or multiple instances thereof. With shared reader strategies, caching and buffer management by the persistence infrastructure and by the control framework may have decisive performance implications for a variety of design choices. Providing the next event may seem straightforward when all event data are contiguously stored in a block, but there may be performance penalties to such strategies when only a subset of a given event's data are needed; conversely, when event data are partitioned by type in persistent storage, providing the next event becomes more complicated, requiring marshalling of data from many I/O buffers. Output strategies pose similarly subtle problems, with complications that may lead to significant serialization and the possibility of serial bottlenecks, either during writing or in post-processing, e. g., during data stream merging. In this paper we describe the I/O components of AthenaMP, the multicore implementation of the ATLAS control framework, and the considerations that have led to the current design, with attention to how these I/O components interact with ATLAS persistent data organization and infrastructure. C1 [van Gemmeren, P.; Malon, D.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Binet, S.] Lab Accelerateur Lineaire IN2P3, F-91898 Orsay, France. [Calafiura, P.; Lavrijsen, W.; Tsulaia, V.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP van Gemmeren, P (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM gemmeren@anl.gov FU U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357] FX Argonne National Laboratory's work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under contract DE-AC02-06CH11357. NR 4 TC 2 Z9 2 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 022054 DI 10.1088/1742-6596/396/2/022054 PG 9 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801006 ER PT S AU Webb, JC Lauret, J Perevoztchikov, V AF Webb, Jason C. Lauret, Jerome Perevoztchikov, Victor GP IOP TI Planning for Evolution in a Production Environment: Migration from a Legacy Geometry Code to an Abstract Geometry Modeling Language in STAR SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ AB Increasingly detailed descriptions of complex detector geometries are required for the simulation and analysis of today's high-energy and nuclear physics experiments. As new tools for the representation of geometry models become available during the course of an experiment, a fundamental challenge arises: how best to migrate from legacy geometry codes developed over many runs to the new technologies, such as the ROOT/TGeo [1] framework, without losing touch with years of development, tuning and validation. One approach, which has been discussed within the community for a number of years, is to represent the geometry model in a higher-level language independent of the concrete implementation of the geometry. The STAR experiment has used this approach to successfully migrate its legacy GEANT 3-era geometry to an Abstract geometry Modelling Language (AgML), which allows us to create both native GEANT 3 and ROOT/TGeo implementations. The language is supported by parsers and a C++ class library which enables the automated conversion of the original source code to AgML, supports export back to the original AgSTAR[5] representation, and creates the concrete ROOT/TGeo geometry implementation used by our track reconstruction software. In this paper we present our approach, design and experience and will demonstrate physical consistency between the original AgSTAR and new AgML geometry representations. C1 [Webb, Jason C.; Lauret, Jerome; Perevoztchikov, Victor] Brookhaven Natl Lab, Upton, NY 11973 USA. RP Webb, JC (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM jwebb@bnl.gov; jlauret@bnl.gov; vperev@bnl.gov NR 8 TC 1 Z9 1 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 022058 DI 10.1088/1742-6596/396/2/022058 PG 8 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801010 ER PT S AU Yarba, J AF Yarba, Julia CA Geant Hadronic Grp GP IOP TI Recent Developments and Validation of Geant4 Hadronic Physics SO INTERNATIONAL CONFERENCE ON COMPUTING IN HIGH ENERGY AND NUCLEAR PHYSICS 2012 (CHEP2012), PTS 1-6 SE Journal of Physics Conference Series LA English DT Proceedings Paper CT International Conference on Computing in High Energy and Nuclear Physics (CHEP) CY MAY 21-25, 2012 CL New York Univ, New York, NY SP Brookhaven Natl Lab (BNL), ACEOLE, Data Direct Networks, Dell, European Middleware Initiat, Nexsan HO New York Univ ID NUCLEAR-REACTIONS; CASCADE; MODEL AB In the past year several improvements in Geant4 hadronic physics code have been made, both for HEP and nuclear physics applications. We discuss the implications of these changes for physics simulation performance and user code. In this context several of the most-used codes will be covered briefly. These include the Fritiof (FTF) parton string model which has been extended to include antinucleon and antinucleus interactions with nuclei, the Bertini-style cascade with its improved CPU performance and extension to include photon interactions, and the precompound and deexcitation models. We have recently released new models and databases for low energy neutrons, and the radioactive decay process has been improved with the addition of forbidden beta decays and better gamma spectra following internal conversion. As new and improved models become available, the number of tests and comparisons to data has increased. One of these is a validation of the parton string models against data from the MIPP experiment, which covers the largely untested range of 50 to 100 GeV. At the other extreme, a new stopped hadron validation will cover pions, kaons and antiprotons. These, and the ongoing simplified calorimeter studies, will be discussed briefly. We also discuss the increasing number of regularly performed validations, the demands they place on both software and users, and the automated validation system being developed to address them. C1 [Yarba, Julia; Geant Hadronic Grp] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Yarba, J (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM yarba_j@fnal.gov NR 19 TC 4 Z9 4 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 396 AR 022060 DI 10.1088/1742-6596/396/2/022060 PG 11 WC Physics, Multidisciplinary; Physics, Nuclear; Physics, Particles & Fields SC Physics GA BDT23 UT WOS:000314749801012 ER PT S AU Chen, KJ Heger, A Almgren, A AF Chen, Ke-Jung Heger, Alexander Almgren, Ann BE Stocks, GM Troparevsky, MC TI Conservative Initial Mapping For Multidimensional Simulations of Stellar Explosions SO IUPAP C20 CONFERENCE ON COMPUTATIONAL PHYSICS (CCP 2011) SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 23rd IUPAP C20 Conference on Computational Physics (CCP) CY OCT 30-NOV 03, 2011 CL Gatlinburg, TN SP Int Union Pure & Appl Phys (IUPAP), Int Union Pure & Appl Phys (IUPAP), Commiss Computat Phys (C20), Amer Phys Soc, Div Computat Phys (APS-DCOMP), Oak Ridge Natl Lab (ORNL), Ctr Defect Phys (CDP), Univ Tennessee (UT)/ORNL, Joint Inst Computat Sci (JICS), Cray, Inc ID HYDRODYNAMICS; SUPERNOVAE; EVOLUTION; STARS; CASTRO AB Mapping one-dimensional stellar profiles onto multidimensional grids as initial conditions for hydrodynamics calculations can lead to numerical artifacts, one of the most severe of which is the violation of conservation laws for physical quantities such as energy and mass. Here we introduce a numerical scheme for mapping one-dimensional spherically-symmetric data onto multidimensional meshes so that these physical quantities are conserved. We validate our scheme by porting a realistic 1D Lagrangian stellar profile to the new multidimensional Eulerian hydro code CASTRO. Our results show that all important features in the profiles are reproduced on the new grid and that conservation laws are enforced at all resolutions after mapping. C1 [Chen, Ke-Jung; Heger, Alexander] Univ Minnesota, Minnesota Inst Astrophys, Minneapolis, MN 55455 USA. [Almgren, Ann] Lawrence Berkeley Natl Lab, Ctr Computat Sci & Engn, Berkeley, CA 94720 USA. RP Chen, KJ (reprint author), Univ Minnesota, Minnesota Inst Astrophys, Minneapolis, MN 55455 USA. EM kchen@physics.umn.edu FU DOE SciDAC program [DOE-FC02-01ER41176, DOE-FC02-06ER41438, DE-FC02-09ER41618]; US Department of Energy [DE-FG02-87ER40328.] FX This work has been supported by the DOE SciDAC program under grants DOE-FC02-01ER41176, DOE-FC02-06ER41438, and DE-FC02-09ER41618, and by the US Department of Energy under grant DE-FG02-87ER40328. NR 12 TC 2 Z9 2 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 402 AR 012024 DI 10.1088/1742-6596/402/1/012024 PG 7 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA BDS66 UT WOS:000314709800023 ER PT S AU Chertkow, MA Messer, OEB Hix, WR Lee, CT Yakunin, K Marronetti, P Bruenn, SW Lentz, EJ Blondin, J Mezzacappa, A AF Chertkow, M. A. Messer, O. E. B. Hix, W. R. Lee, C. T. Yakunin, K. Marronetti, P. Bruenn, S. W. Lentz, E. J. Blondin, J. Mezzacappa, A. BE Stocks, GM Troparevsky, MC TI Advancements in modeling self-consistent core collapse supernovae with CHIMERA SO IUPAP C20 CONFERENCE ON COMPUTATIONAL PHYSICS (CCP 2011) SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 23rd IUPAP C20 Conference on Computational Physics (CCP) CY OCT 30-NOV 03, 2011 CL Gatlinburg, TN SP Int Union Pure & Appl Phys (IUPAP), Int Union Pure & Appl Phys (IUPAP), Commiss Computat Phys (C20), Amer Phys Soc, Div Computat Phys (APS-DCOMP), Oak Ridge Natl Lab (ORNL), Ctr Defect Phys (CDP), Univ Tennessee (UT)/ORNL, Joint Inst Computat Sci (JICS), Cray, Inc ID MASSIVE STARS; NUCLEOSYNTHESIS; EVOLUTION; ABUNDANCES; HOT AB We discuss advancements in modeling core-collapse supernovae with our code CHIMERA. We describe the status and details of our tracer particle method and its uses for post-processing nucleosynthesis and as a tool for broad core-collapse supernova (CCSN) model analyses. We also introduce our progress towards expanding a nuclear reaction network beyond the alpha-network for the purpose of accurate in-situ nucleosynthesis, not only for core-collapse supernovae (CCSNe) in general, but for a special sub-class of supernovae called electron capture supernovae (ECSNe), which stem from progenitors stars between 8 and 10 M-circle dot. By using an advanced nuclear reaction network, our 2D and 3D code will allow for unparalleled studies of CCSNe and ECSNe ejecta. C1 [Chertkow, M. A.; Messer, O. E. B.; Hix, W. R.; Lentz, E. J.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. [Messer, O. E. B.; Hix, W. R.; Lee, C. T.; Lentz, E. J.; Mezzacappa, A.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. [Yakunin, K.; Marronetti, P.; Bruenn, S. W.] Florida Atlant Univ, Dept Phys, Boca Raton, FL 33431 USA. [Blondin, J.] North Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA. RP Chertkow, MA (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. EM chertkow@utk.edu RI Hix, William/E-7896-2011; Messer, Bronson/G-1848-2012; Lentz, Eric/M-7173-2015; Mezzacappa, Anthony/B-3163-2017 OI Hix, William/0000-0002-9481-9126; Messer, Bronson/0000-0002-5358-5415; Lentz, Eric/0000-0002-5231-0532; Mezzacappa, Anthony/0000-0001-9816-9741 FU NSF [NSF-AST-0653376, NSF-PHY-0855315, NSF-OCI-0749242, NSF-OCI-0749204]; NASA [07-ATFP07-0011]; Office of Nuclear Physics; US Department of Energy; OEBM; Office of Advanced Scientific Computing Research, US Department of Energy FX This work was supported in part by NSF grants NSF-AST-0653376, NSF-PHY-0855315, NSF-OCI-0749242, NSF-OCI-0749204 & NASA grant 07-ATFP07-0011. WRH and AM acknowledge support from the Office of Nuclear Physics, US Department of Energy, and OEBM and AM acknowledge support from the Office of Advanced Scientific Computing Research, US Department of Energy. NR 27 TC 1 Z9 1 U1 0 U2 6 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 402 AR 012025 DI 10.1088/1742-6596/402/1/012025 PG 11 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA BDS66 UT WOS:000314709800024 ER PT S AU Endeve, E Cardall, CY Budiardja, RD Mezzacappa, A AF Endeve, E. Cardall, C. Y. Budiardja, R. D. Mezzacappa, A. BE Stocks, GM Troparevsky, MC TI Turbulent magnetic field amplification from spiral SASI modes in core-collapse supernovae SO IUPAP C20 CONFERENCE ON COMPUTATIONAL PHYSICS (CCP 2011) SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 23rd IUPAP C20 Conference on Computational Physics (CCP) CY OCT 30-NOV 03, 2011 CL Gatlinburg, TN SP Int Union Pure & Appl Phys (IUPAP), Int Union Pure & Appl Phys (IUPAP), Commiss Computat Phys (C20), Amer Phys Soc, Div Computat Phys (APS-DCOMP), Oak Ridge Natl Lab (ORNL), Ctr Defect Phys (CDP), Univ Tennessee (UT)/ORNL, Joint Inst Computat Sci (JICS), Cray, Inc ID HYPERBOLIC CONSERVATION-LAWS; GENERAL-RELATIVISTIC MAGNETOHYDRODYNAMICS; CONSTRAINED TRANSPORT METHOD; ACCRETION-SHOCK INSTABILITY; SPECTRAL NEUTRINO TRANSPORT; APPROXIMATE RIEMANN SOLVER; GODUNOV-TYPE SCHEMES; GAMMA-RAY BURSTS; IDEAL MAGNETOHYDRODYNAMICS; MASSIVE STARS AB We describe the initial implementation of magnetohydrodynamics (MHD) in our astrophysical simulation code GENASIS. Then, we present MHD simulations exploring the capacity of the stationary accretion shock instability (SASI) to generate magnetic fields by adding a weak magnetic field to an initially spherically symmetric fluid configuration that models a stalled shock in the post-bounce supernova environment. Upon perturbation and nonlinear SASI development, shear flows associated with the spiral SASI mode contributes to a widespread and turbulent field amplification mechanism. While the SASI may contribute to neutron star magnetization, these simulations do not show qualitatively new features in the global evolution of the shock as a result of SASI-induced magnetic field amplification. C1 [Endeve, E.; Mezzacappa, A.] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. [Cardall, C. Y.; Budiardja, R. D.; Mezzacappa, A.] ORNL, Div Phys, Oak Ridge, TN 37831 USA. [Cardall, C. Y.; Budiardja, R. D.; Mezzacappa, A.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. [Budiardja, R. D.] ORNL, Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA. RP Endeve, E (reprint author), Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. EM endevee@ornl.gov RI Mezzacappa, Anthony/B-3163-2017; OI Mezzacappa, Anthony/0000-0001-9816-9741; Endeve, Eirik/0000-0003-1251-9507 FU Office of Advanced Scientific Computing Research; Office of Nuclear Physics, U. S. Department of Energy FX This research was supported by the Office of Advanced Scientific Computing Research and the Office of Nuclear Physics, U. S. Department of Energy. This research used resources of the Oak Ridge Leadership Computing Facility at the Oak Ridge National Laboratory provided through the INCITE program. NR 53 TC 2 Z9 2 U1 0 U2 6 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 402 AR 012027 DI 10.1088/1742-6596/402/1/012027 PG 15 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA BDS66 UT WOS:000314709800026 ER PT S AU Kim, J Esler, KP McMinis, J Morales, MA Clark, BK Shulenburger, L Ceperley, DM AF Kim, Jeongnim Esler, Kenneth P. McMinis, Jeremy Morales, Miguel A. Clark, Bryan K. Shulenburger, Luke Ceperley, David M. BE Stocks, GM Troparevsky, MC TI Hybrid algorithms in quantum Monte Carlo SO IUPAP C20 CONFERENCE ON COMPUTATIONAL PHYSICS (CCP 2011) SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 23rd IUPAP C20 Conference on Computational Physics (CCP) CY OCT 30-NOV 03, 2011 CL Gatlinburg, TN SP Int Union Pure & Appl Phys (IUPAP), Int Union Pure & Appl Phys (IUPAP), Commiss Computat Phys (C20), Amer Phys Soc, Div Computat Phys (APS-DCOMP), Oak Ridge Natl Lab (ORNL), Ctr Defect Phys (CDP), Univ Tennessee (UT)/ORNL, Joint Inst Computat Sci (JICS), Cray, Inc AB With advances in algorithms and growing computing powers, quantum Monte Carlo (QMC) methods have become a leading contender for high accuracy calculations for the electronic structure of realistic systems. The performance gain on recent HPC systems is largely driven by increasing parallelism: the number of compute cores of a SMP and the number of SMPs have been going up, as the Top500 list at tests. However, the available memory as well as the communication and memory bandwidth per element has not kept pace with the increasing parallelism. This severely limits the applicability of QMC and the problem size it can handle. OpenMP/MPI hybrid programming provides applications with simple but effective solutions to overcome efficiency and scalability bottlenecks on large-scale clusters based on multi/many-core SMPs. We discuss the design and implementation of hybrid methods in QMCPACK and analyze its performance on current HPC platforms characterized by various memory and communication hierarchies. C1 [Kim, Jeongnim; Esler, Kenneth P.; Ceperley, David M.] Univ Illinois, Natl Ctr Supercomp Applicat, Urbana, IL 61802 USA. [Kim, Jeongnim] Oak Ridge Natl Lab, Oak Ridge, TN USA. [McMinis, Jeremy; Ceperley, David M.] Univ Illinois, Dept Phys, Urbana, IL USA. [Morales, Miguel A.] Lawrence Livermore Natl Lab, Livermore, CA USA. [Clark, Bryan K.] Princeton Univ, Princeton Ctr Theoret Sci, Princeton, NJ USA. [Shulenburger, Luke] Sandia Natl Labs, Albuquerque, NM USA. RP Kim, J (reprint author), Univ Illinois, Natl Ctr Supercomp Applicat, Urbana, IL 61802 USA. OI McMinis, Jeremy/0000-0003-3285-3940 FU U.S. Department of Energy (DOE) [DOEDE- FG05-08OR23336]; National Science Foundation (NSF) [0904572]; US DOE by LLNL [DEAC52- 07NA27344]; Laboratory Directed Research and Development Program of Oak Ridge National Laboratory; UT-Battelle, LLC; U.S. Department of Energy; U.S. DOE's National Nuclear Security Administration [DE-AC04-94AL85000]; National Center for Computational Sciences and the Center for Nanophase Materials Sciences; Advanced Scienti fi c Computing Research and Basic Energy Sciences of DOE [DE-AC05-00OR22725]; NSF [TG-MCA93S030, TGMCA07S016] FX This work was supported by the U.S. Department of Energy (DOE) under Contract No. DOEDE- FG05-08OR23336 and by the National Science Foundation (NSF) under No. 0904572. This work was performed in part under the auspices of the US DOE by LLNL under Contract DEAC52- 07NA27344 and by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the U.S. Department of Energy. Sandia National Laboratories is a multiprogram laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. DOE's National Nuclear Security Administration under Contract No. DE-AC04-94AL85000. This research used resources of the National Center for Computational Sciences and the Center for Nanophase Materials Sciences, which are sponsored by the respective facilities divisions of the o ffi ces of Advanced Scienti fi c Computing Research and Basic Energy Sciences of DOE under Contract No. DE-AC05-00OR22725 and allocations under TG-MCA93S030 and TGMCA07S016 of advanced computing resources provided by the NSF. NR 14 TC 34 Z9 34 U1 0 U2 10 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 402 AR 012008 DI 10.1088/1742-6596/402/1/012008 PG 12 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA BDS66 UT WOS:000314709800008 ER PT S AU Kumar, R Li, YG Sides, SW Mays, JW Sumpter, BG AF Kumar, Rajeev Li, Yige Sides, Scott W. Mays, Jimmy W. Sumpter, Bobby G. BE Stocks, GM Troparevsky, MC TI Morphology diagrams for A(2)B copolymer melts: real-space self-consistent field theory SO IUPAP C20 CONFERENCE ON COMPUTATIONAL PHYSICS (CCP 2011) SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 23rd IUPAP C20 Conference on Computational Physics (CCP) CY OCT 30-NOV 03, 2011 CL Gatlinburg, TN SP Int Union Pure & Appl Phys (IUPAP), Int Union Pure & Appl Phys (IUPAP), Commiss Computat Phys (C20), Amer Phys Soc, Div Computat Phys (APS-DCOMP), Oak Ridge Natl Lab (ORNL), Ctr Defect Phys (CDP), Univ Tennessee (UT)/ORNL, Joint Inst Computat Sci (JICS), Cray, Inc ID MIKTOARM STAR COPOLYMERS; MICROPHASE-SEPARATION; DIBLOCK COPOLYMER; BLOCK-COPOLYMERS; CONFORMATIONAL ASYMMETRY; GRAFT-COPOLYMERS; PHASE-BEHAVIOR; POLYDISPERSITY; ARCHITECTURE; TRANSITION AB Morphology diagrams for A(2)B copolymer melts are constructed using real-space self-consistent field theory (SCFT). In particular, the effect of architectural asymmetry on the morphology diagram is studied. It is shown that asymmetry in the lengths of A arms in the A(2)B copolymer melts aids in the microphase separation. As a result, the disorder-order transition boundaries for the A(2)B copolymer melts are shown to shift downward in terms of chi N, chi and N being the Flory's chi parameter and the total number of the Kuhn segments, respectively, in comparison with the A(2)B copolymers containing symmetric A arms. Furthermore, perforated lamellar (PL) and a micelle-like (M) microphase segregated morphologies are found to compete with the classical morphologies namely, lamellar, cylinders, spheres and gyroid. The PL morphology is found to be stable for A(2)B copolymers containing asymmetric A arms and M is found to be metastable for the parameter range explored in this work. C1 [Kumar, Rajeev] Oak Ridge Natl Lab, Natl Ctr Computat Sci, Oak Ridge, TN 37831 USA. [Li, Yige] Denison Univ, Granville, OH 43023 USA. [Sides, Scott W.] Tech X Corp, Boulder, CO 80303 USA. [Mays, Jimmy W.] Univ Tennessee, Dept Chem, Knoxville, TN 37096 USA. [Sumpter, Bobby G.] Oak Ridge Natl Lab, Cent Nanophase Mat Sci, POB 2008, Oak Ridge, TN 37831 USA. RP Kumar, R (reprint author), Oak Ridge Natl Lab, Natl Ctr Computat Sci, Oak Ridge, TN 37831 USA. EM kumarr@ornl.gov RI Sumpter, Bobby/C-9459-2013; KUMAR, RAJEEV/D-2562-2010; Kumar, Rajeev/Q-2255-2015 OI Sumpter, Bobby/0000-0001-6341-0355; Kumar, Rajeev/0000-0001-9494-3488 NR 28 TC 1 Z9 1 U1 0 U2 18 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 402 AR 012042 DI 10.1088/1742-6596/402/1/012042 PG 7 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA BDS66 UT WOS:000314709800041 ER PT S AU Nam, H Stoitsov, M Nazarewicz, W Bulgac, A Hagen, G Kortelainen, M Maris, P Pei, JC Roche, KJ Schunck, N Thompson, I Vary, JP Wild, SM AF Nam, H. Stoitsov, M. Nazarewicz, W. Bulgac, A. Hagen, G. Kortelainen, M. Maris, P. Pei, J. C. Roche, K. J. Schunck, N. Thompson, I. Vary, J. P. Wild, S. M. BE Stocks, GM Troparevsky, MC TI UNEDF: Advanced Scientific Computing Collaboration Transforms the Low-Energy Nuclear Many-Body Problem SO IUPAP C20 CONFERENCE ON COMPUTATIONAL PHYSICS (CCP 2011) SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 23rd IUPAP C20 Conference on Computational Physics (CCP) CY OCT 30-NOV 03, 2011 CL Gatlinburg, TN SP Int Union Pure & Appl Phys (IUPAP), Int Union Pure & Appl Phys (IUPAP), Commiss Computat Phys (C20), Amer Phys Soc, Div Computat Phys (APS-DCOMP), Oak Ridge Natl Lab (ORNL), Ctr Defect Phys (CDP), Univ Tennessee (UT)/ORNL, Joint Inst Computat Sci (JICS), Cray, Inc AB The demands of cutting-edge science are driving the need for larger and faster computing resources. With the rapidly growing scale of computing systems and the prospect of technologically disruptive architectures to meet these needs, scientists face the challenge of effectively using complex computational resources to advance scientific discovery. Multidisciplinary collaborating networks of researchers with diverse scientific backgrounds are needed to address these complex challenges. The UNEDF SciDAC collaboration of nuclear theorists, applied mathematicians, and computer scientists is developing a comprehensive description of nuclei and their reactions that delivers maximum predictive power with quantified uncertainties. This paper describes UNEDF and identifies attributes that classify it as a successful computational collaboration. We illustrate significant milestones accomplished by UNEDF through integrative solutions using the most reliable theoretical approaches, most advanced algorithms, and leadership-class computational resources. C1 [Nam, H.; Stoitsov, M.; Nazarewicz, W.; Hagen, G.; Kortelainen, M.; Pei, J. C.] Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. [Stoitsov, M.; Kortelainen, M.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. [Nazarewicz, W.] Warsaw Univ, Inst Theoret Phys, PL-00681 Warsaw, Poland. [Bulgac, A.] Univ Washington, Dept Phys, Seattle, WA 98195 USA. [Roche, K. J.] Pacif NW Natl Lab, Richland, WA 99352 USA. [Schunck, N.; Thompson, I.] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. [Maris, P.] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. [Wild, S. M.] Div Argonne Natl Lab, Math & Comp Sci Div, Argonne, IL 60439 USA. RP Nam, H (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. EM namha@ornl.gov RI Pei, Junchen/E-3532-2010; Wild, Stefan/P-4907-2016; OI Wild, Stefan/0000-0002-6099-2772; Schunck, Nicolas/0000-0002-9203-6849; Hagen, Gaute/0000-0001-6019-1687 NR 13 TC 6 Z9 6 U1 0 U2 16 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 402 AR 012033 DI 10.1088/1742-6596/402/1/012033 PG 12 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA BDS66 UT WOS:000314709800032 ER PT S AU Odbadrakh, K Nicholson, DM Rusanu, A Samolyuk, GD Stoller, RE Zhang, XG Stocks, GM AF Odbadrakh, Kh Nicholson, D. M. Rusanu, A. Samolyuk, G. D. Stoller, R. E. Zhang, X. -G. Stocks, G. M. BE Stocks, GM Troparevsky, MC TI Coarse Grained Approach to First Principles Modeling of Radiation Cascade in Large Fe Supercells SO IUPAP C20 CONFERENCE ON COMPUTATIONAL PHYSICS (CCP 2011) SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 23rd IUPAP C20 Conference on Computational Physics (CCP) CY OCT 30-NOV 03, 2011 CL Gatlinburg, TN SP Int Union Pure & Appl Phys (IUPAP), Int Union Pure & Appl Phys (IUPAP), Commiss Computat Phys (C20), Amer Phys Soc, Div Computat Phys (APS-DCOMP), Oak Ridge Natl Lab (ORNL), Ctr Defect Phys (CDP), Univ Tennessee (UT)/ORNL, Joint Inst Computat Sci (JICS), Cray, Inc ID MOLECULAR-DYNAMICS SIMULATIONS; ALPHA-IRON; ELECTRON-IRRADIATION; PRIMARY DAMAGE; METALS; IMPURITIES; EVOLUTION; DEFECTS AB Classical Molecular Dynamics (MD) simulations characterizing dislocations and radiation damage typically treat 10(5)-10(7) atoms. First principles techniques employed to understand systems at an atomistic level are not practical for such large systems consisting of millions of atoms. We present an efficient coarse grained (CG) approach to calculate local electronic and magnetic properties of large MD-generated structures from the first principles. Local atomic magnetic moments in crystalline Fe are perturbed by the presence of radiation generated vacancies and interstitials. The effects are most pronounced near the defect cores and decay slowly as the strain field of the defects decrease with distance. We develop the CG technique based on the Locally Self-consistent Multiple Scattering (LSMS) method that exploits the near-sightedness of the electron Green function. The atomic positions were determined by MD with an embedded atom force field. The local moments in the neighborhood of the defect cores are calculated with first-principles based on full local structure information. Atoms in the rest of the system are modeled by representative atoms with approximated properties. The calculations result in local moments near the defect centers with first-principles accuracy, while capturing coarse-grained details of local moments at greater length scales. This CG approach makes these large scale structures amenable to first principles study. C1 [Odbadrakh, Kh; Rusanu, A.; Samolyuk, G. D.; Stoller, R. E.; Zhang, X. -G.; Stocks, G. M.] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37830 USA. [Nicholson, D. M.] Oak Ridge Natl Lab, Computat Sci & Math Div, Oak Ridge, TN 37830 USA. RP Odbadrakh, K (reprint author), Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37830 USA. EM odbadrakhk@ornl.gov RI Stocks, George Malcollm/Q-1251-2016 OI Stocks, George Malcollm/0000-0002-9013-260X FU Center for Defect Physics in Structural Materials (CDP); Energy Frontier Research Center; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences; Oak Ridge Leadership Computing Facility at Oak Ridge National Laboratory; Office of Science of the Department of Energy [DE-AC05-00OR22725] FX This material is based up on work supported as part of the Center for Defect Physics in Structural Materials (CDP), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences. This research used resources of the Oak Ridge Leadership Computing Facility at Oak Ridge National Laboratory, which is supported by the Office of Science of the Department of Energy under contract DE-AC05-00OR22725 NR 25 TC 0 Z9 0 U1 0 U2 22 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 402 AR 012011 DI 10.1088/1742-6596/402/1/012011 PG 7 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA BDS66 UT WOS:000314709800011 ER PT S AU Ojha, M Nicholson, DM Odbadrakh, K Radhakrishnan, B Stoller, RE Egami, T AF Ojha, Madhusudan Nicholson, D. M. Odbadrakh, Kh. Radhakrishnan, Bala. Stoller, R. E. Egami, Takeshi BE Stocks, GM Troparevsky, MC TI The use of atomic level stress to characterize the structure of irradiated iron SO IUPAP C20 CONFERENCE ON COMPUTATIONAL PHYSICS (CCP 2011) SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 23rd IUPAP C20 Conference on Computational Physics (CCP) CY OCT 30-NOV 03, 2011 CL Gatlinburg, TN SP Int Union Pure & Appl Phys (IUPAP), Int Union Pure & Appl Phys (IUPAP), Commiss Computat Phys (C20), Amer Phys Soc, Div Computat Phys (APS-DCOMP), Oak Ridge Natl Lab (ORNL), Ctr Defect Phys (CDP), Univ Tennessee (UT)/ORNL, Joint Inst Computat Sci (JICS), Cray, Inc ID MOLECULAR-DYNAMICS; DENSITY; SIMULATIONS; METALS AB The behaviour of irradiated material near a primary knock on atom immediately after impact is of great importance for designing reactor materials. Currently, molecular dynamics simulations with classical force fields provide the foundation for understanding the resulting cascade. However, modern density functional calculations can now treat large enough numbers of atoms that they can provide additional details of the magnetic and electronic nature of irradiated samples. In this paper we calculate from first principles the atomic level stresses for an instantaneous configuration following the initiation of a low energy cascade in iron. C1 [Ojha, Madhusudan; Radhakrishnan, Bala.; Egami, Takeshi] Univ Tennessee, Knoxville, TN 37996 USA. [Nicholson, D. M.; Odbadrakh, Kh.; Stoller, R. E.; Egami, Takeshi] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Ojha, M (reprint author), Univ Tennessee, Knoxville, TN 37996 USA. EM nicholsondm@ornl.gov FU Division of Materials Science and Engineering; Office of Basic Energy Sciences; Department of Energy; Center for Defect Physics in Structural Materials (CDP); U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences; Oak Ridge Leadership Computing Facility at Oak Ridge National Laboratory FX This research was supported by the Division of Materials Science and Engineering, Office of Basic Energy Sciences, Department of Energy, and as part of the Center for Defect Physics in Structural Materials (CDP), an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences. This research used resources of the Oak Ridge Leadership Computing Facility at Oak Ridge National Laboratory. NR 18 TC 1 Z9 1 U1 0 U2 23 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 402 AR 012010 DI 10.1088/1742-6596/402/1/012010 PG 6 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA BDS66 UT WOS:000314709800010 ER PT S AU Parete-Koon, ST Smith, CR Guidry, MW Hix, WR Messer, OEB AF Parete-Koon, S. T. Smith, C. R. Guidry, M. W. Hix, W. R. Messer, O. E. B. BE Stocks, GM Troparevsky, MC TI Ash-detonation interactions in multi-dimensional simulation of Type Ia supernovae SO IUPAP C20 CONFERENCE ON COMPUTATIONAL PHYSICS (CCP 2011) SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 23rd IUPAP C20 Conference on Computational Physics (CCP) CY OCT 30-NOV 03, 2011 CL Gatlinburg, TN SP Int Union Pure & Appl Phys (IUPAP), Int Union Pure & Appl Phys (IUPAP), Commiss Computat Phys (C20), Amer Phys Soc, Div Computat Phys (APS-DCOMP), Oak Ridge Natl Lab (ORNL), Ctr Defect Phys (CDP), Univ Tennessee (UT)/ORNL, Joint Inst Computat Sci (JICS), Cray, Inc AB Thermonuclear supernovae (Type Ia SNe) are believed to result from the complete disruption of a near-Chandrasekhar-mass white dwarf (WD) by explosive thermonuclear runaway. Their use as cosmological distance indicators as well as comprehension of their role in galactic chemical evolution ultimately depends on a reliable and robust understanding of the explosion mechanism. We have undertaken a study of turbulent thermonuclear combustion in these events, focusing on the effects of increased physical fidelity in simulations, through improved resolution and increased dimensionality. We begin with a series of detonation simulations at low WD densities that we will use for baseline metrics against which subsequent simulations will be measured. We have performed these simulations using a version of the FLASH code[1]. We show progress on a set of simulations in one, two, and three spatial dimensions designed to explore the impact of dimensionality on the evolution of the detonations, and thereby clearly delineate the role of the nuclear kinetics. By performing a suite of simulations incorporating an alpha network at several levels of maximum mesh refinement, we will be able to quantify the effects of resolution and network size on future results. C1 [Parete-Koon, S. T.; Guidry, M. W.; Hix, W. R.; Messer, O. E. B.] Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. [Smith, C. R.; Guidry, M. W.; Hix, W. R.; Messer, O. E. B.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37906 USA. RP Parete-Koon, ST (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. EM parete-koonst@ornl.gov RI Hix, William/E-7896-2011; Messer, Bronson/G-1848-2012 OI Hix, William/0000-0002-9481-9126; Messer, Bronson/0000-0002-5358-5415 NR 6 TC 0 Z9 0 U1 0 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 402 AR 012028 DI 10.1088/1742-6596/402/1/012028 PG 7 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA BDS66 UT WOS:000314709800027 ER PT S AU Pei, JC Fann, GI Harrison, RJ Nazarewicz, W Hill, J Galindo, D Jia, J AF Pei, J. C. Fann, G. I. Harrison, R. J. Nazarewicz, W. Hill, J. Galindo, D. Jia, J. BE Stocks, GM Troparevsky, MC TI Coordinate-Space Hartree-Fock-Bogoliubov Solvers for Superfluid Fermi Systems in Large Boxes SO IUPAP C20 CONFERENCE ON COMPUTATIONAL PHYSICS (CCP 2011) SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 23rd IUPAP C20 Conference on Computational Physics (CCP) CY OCT 30-NOV 03, 2011 CL Gatlinburg, TN SP Int Union Pure & Appl Phys (IUPAP), Int Union Pure & Appl Phys (IUPAP), Commiss Computat Phys (C20), Amer Phys Soc, Div Computat Phys (APS-DCOMP), Oak Ridge Natl Lab (ORNL), Ctr Defect Phys (CDP), Univ Tennessee (UT)/ORNL, Joint Inst Computat Sci (JICS), Cray, Inc ID BASES AB The self-consistent Hartree-Fock-Bogoliubov problem in large boxes can be solved accurately in the coordinate space with the recently developed solvers HFB-AX (2D) and MADNESS-HFB (3D). This is essential for the description of superfluid Fermi systems with complicated topologies and significant spatial extend, such as fissioning nuclei, weakly-bound nuclei, nuclear matter in the neutron star rust, and ultracold Fermi atoms in elongated traps. The HFB-AX solver based on B-spline techniques uses a hybrid MPI and OpenMP programming model for parallel computation for distributed parallel computation, within a node multi-threaded LAPACK and BLAS libraries are used to further enable parallel calculations of large eigensystems. The MADNESS-HFB solver uses a novel multi-resolution analysis based adaptive pseudo-spectral techniques to enable fully parallel 3D calculations of very large systems. In this work we present benchmark results for HFB-AX and MADNESS-HFB on ultracold trapped fermions. C1 [Pei, J. C.; Nazarewicz, W.] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. [Pei, J. C.; Nazarewicz, W.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. [Fann, G. I.; Harrison, R. J.; Hill, J.; Galindo, D.; Jia, J.] Comp Sci & Math Div, Oak Ridge, TN 37830 USA. [Harrison, R. J.] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA. [Nazarewicz, W.] Univ Warsaw, Inst Theoret Phys, Hoza 69, PL-00681 Warsaw, Poland. RP Pei, JC (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. EM peij@ornl.gov RI Pei, Junchen/E-3532-2010 FU U.S. Department of Energy [DE-FG02-96ER40963, DE-FC02-09ER41583]; Office of Advanced Scientific Computing Research; U.S. Department of Energy; Oak Ridge National Laboratory; LLC [De-AC0500OR22725] FX This work was supported in part by the U.S. Department of Energy under Contract Nos. DE-FG02-96ER40963 ( University of Tennessee) and DE-FC02-09ER41583 (UNEDF SciDAC Collaboration). It is also partially sponsored by the Office of Advanced Scientific Computing Research; U.S. Department of Energy. The work was partially performed at the Oak Ridge National Laboratory, which is managed by UT- Battelle, LLC under Contract No. De-AC0500OR22725. NR 16 TC 6 Z9 6 U1 0 U2 9 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 402 AR 012035 DI 10.1088/1742-6596/402/1/012035 PG 7 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA BDS66 UT WOS:000314709800034 ER PT S AU Petreczky, P AF Petreczky, P. BE Stocks, GM Troparevsky, MC TI Numerical study of hot strongly interacting matter SO IUPAP C20 CONFERENCE ON COMPUTATIONAL PHYSICS (CCP 2011) SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 23rd IUPAP C20 Conference on Computational Physics (CCP) CY OCT 30-NOV 03, 2011 CL Gatlinburg, TN SP Int Union Pure & Appl Phys (IUPAP), Int Union Pure & Appl Phys (IUPAP), Commiss Computat Phys (C20), Amer Phys Soc, Div Computat Phys (APS-DCOMP), Oak Ridge Natl Lab (ORNL), Ctr Defect Phys (CDP), Univ Tennessee (UT)/ORNL, Joint Inst Computat Sci (JICS), Cray, Inc ID SU(2) GAUGE-THEORY; MESON SPECTRAL FUNCTIONS; EQUATION-OF-STATE; FINITE-TEMPERATURE; LATTICE QCD; SCALING FUNCTIONS; SCREENING MASSES; MONTE-CARLO; FLAVOR QCD; QUARK AB I review recent progress in study of strongly interacting matter at high temperatures using Monte-Carlo simulations in lattice QCD. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Petreczky, P (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. NR 92 TC 4 Z9 4 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 402 AR 012036 DI 10.1088/1742-6596/402/1/012036 PG 15 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA BDS66 UT WOS:000314709800035 ER PT S AU Quaglioni, S Navratil, P Roth, R Horiuchi, W AF Quaglioni, S. Navratil, P. Roth, R. Horiuchi, W. BE Stocks, GM Troparevsky, MC TI From nucleons to nuclei to fusion reactions SO IUPAP C20 CONFERENCE ON COMPUTATIONAL PHYSICS (CCP 2011) SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 23rd IUPAP C20 Conference on Computational Physics (CCP) CY OCT 30-NOV 03, 2011 CL Gatlinburg, TN SP Int Union Pure & Appl Phys (IUPAP), Int Union Pure & Appl Phys (IUPAP), Commiss Computat Phys (C20), Amer Phys Soc, Div Computat Phys (APS-DCOMP), Oak Ridge Natl Lab (ORNL), Ctr Defect Phys (CDP), Univ Tennessee (UT)/ORNL, Joint Inst Computat Sci (JICS), Cray, Inc ID CONTINUUM SHELL-MODEL; ELASTIC-SCATTERING; CROSS-SECTIONS; UNIFIED THEORY; LAGRANGE MESH; GAMMA)B-8; CAPTURE; BE-7(P AB Nuclei are prototypes of many-body open quantum systems. Complex aggregates of protons and neutrons that interact through forces arising from quantum chromo-dynamics, nuclei exhibit both bound and unbound states, which can be strongly coupled. In this respect, one of the major challenges for computational nuclear physics, is to provide a unified description of structural and reaction properties of nuclei that is based on the fundamental underlying physics: the constituent nucleons and the realistic interactions among them. This requires a combination of innovative theoretical approaches and high-performance computing. In this contribution, we present one of such promising techniques, the ab initio no-core shell model/resonating-group method, and discuss applications to light nuclei scattering and fusion reactions that power stars and Earth-base fusion facilities. C1 [Quaglioni, S.; Navratil, P.] Lawrence Livermore Natl Lab, POB 808,L-414, Livermore, CA 94551 USA. [Navratil, P.] TRIUMF, Vancouver, BC V6T 2A3, Canada. [Roth, R.] Univ Darmstadt, Inst Kernphysik Tech, D-64289 Darmstadt, Germany. [Horiuchi, W.] RIKEN, Nishina Ctr, Wako, Saitama 3510198, Japan. RP Quaglioni, S (reprint author), Lawrence Livermore Natl Lab, POB 808,L-414, Livermore, CA 94551 USA. EM quaglioni1@llnl.gov NR 59 TC 5 Z9 5 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 402 AR 012037 DI 10.1088/1742-6596/402/1/012037 PG 17 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA BDS66 UT WOS:000314709800036 ER PT S AU Radhakrishnan, B Gorti, SB Nicholson, DM Dantzig, J AF Radhakrishnan, B. Gorti, S. B. Nicholson, D. M. Dantzig, J. BE Stocks, GM Troparevsky, MC TI Comparison of Phase Field Crystal and Molecular Dynamics Simulations for a Shrinking Grain SO IUPAP C20 CONFERENCE ON COMPUTATIONAL PHYSICS (CCP 2011) SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 23rd IUPAP C20 Conference on Computational Physics (CCP) CY OCT 30-NOV 03, 2011 CL Gatlinburg, TN SP Int Union Pure & Appl Phys (IUPAP), Int Union Pure & Appl Phys (IUPAP), Commiss Computat Phys (C20), Amer Phys Soc, Div Computat Phys (APS-DCOMP), Oak Ridge Natl Lab (ORNL), Ctr Defect Phys (CDP), Univ Tennessee (UT)/ORNL, Joint Inst Computat Sci (JICS), Cray, Inc AB The Phase-Field Crystal (PFC) model represents the atomic density as a continuous function, whose spatial distribution evolves at diffusional, rather than vibrational time scales. PFC provides a tool to study defect interactions at the atomistic level but over longer time scales than in molecular dynamics (MD). We examine the behavior of the PFC model with the goal of relating the PFC parameters to physical parameters of real systems, derived from MD simulations. For this purpose we model the phenomenon of the shrinking of a spherical grain situated in a matrix. By comparing the rate of shrinking of the central grain using MD and PFC we obtain a relationship between PFC and MD time scales for processes driven by grain boundary diffusion. The morphological changes in the central grain including grain shape and grain rotation are also examined in order to assess the accuracy of the PFC in capturing the evolution path predicted by MD. C1 [Radhakrishnan, B.; Gorti, S. B.; Nicholson, D. M.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [Dantzig, J.] Univ Illinois, Urbana, IL 61801 USA. RP Radhakrishnan, B (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM radhakrishnb@ornl.gov FU Energy Frontier Research Center (EFRC); DOE at ORNL [DE-AC05-00OR22725]; Office of Science of the Department of Energy [DE-AC0500OR22725] FX Research funded by the Energy Frontier Research Center (EFRC) project, Center for Defect Physics, Basic Energy Sciences, DOE at ORNL under contract DE-AC05-00OR22725. Computational resources were provided by the National Center for Computational Sciences at ORNL, which is supported by the Office of Science of the Department of Energy under Contract DE-AC0500OR22725. NR 7 TC 1 Z9 1 U1 0 U2 14 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 402 AR 012043 DI 10.1088/1742-6596/402/1/012043 PG 7 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA BDS66 UT WOS:000314709800042 ER PT S AU Rogers, DM Rempe, SB AF Rogers, David M. Rempe, Susan B. BE Stocks, GM Troparevsky, MC TI Irreversible Thermodynamics SO IUPAP C20 CONFERENCE ON COMPUTATIONAL PHYSICS (CCP 2011) SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 23rd IUPAP C20 Conference on Computational Physics (CCP) CY OCT 30-NOV 03, 2011 CL Gatlinburg, TN SP Int Union Pure & Appl Phys (IUPAP), Int Union Pure & Appl Phys (IUPAP), Commiss Computat Phys (C20), Amer Phys Soc, Div Computat Phys (APS-DCOMP), Oak Ridge Natl Lab (ORNL), Ctr Defect Phys (CDP), Univ Tennessee (UT)/ORNL, Joint Inst Computat Sci (JICS), Cray, Inc ID FREE-ENERGY DIFFERENCES; STATISTICAL-MECHANICS; STOCHASTIC DYNAMICS; INFORMATION-THEORY; NONEQUILIBRIUM THERMODYNAMICS; FLUCTUATION THEOREM; ENTROPY PRODUCTION; EQUATIONS; DERIVATION; SIMULATION AB We present a maximum-entropy theory of mesoscopic kinetics. The theory gives fully nonlinear nonequilibrium thermodynamic relationships and has no explicit requirement for either microscopic bath variables, an equilibrium energy, or an equilibrium partition function. The entropy maximization process is instead carried out over transition probability distributions with constraints on particle position and velocity updates. The Lagrange multipliers for these constraints express the instantaneous temperature and pressure of external (or microscopic) thermostatic driving systems, with which the distinguished system may or may not eventually reach equilibrium. We show that the analogues of the Gibbs-Maxwell relations and free energy perturbation techniques carry over to fluctuation-dissipation theorems and nonequilibrium ensemble reweighting techniques as should be expected. The result is a fully time-dependent, non-local description of a nonequilibrium ensemble coupled to reservoirs at possibly time-varying thermostatic or mechanical states. We also show that the thermodynamic entropy production extends the generalized fluctuation theorem through the addition of an instantaneous information entropy term for the end-points, leading to a concise statement of the second law of thermodynamics. C1 [Rogers, David M.; Rempe, Susan B.] Sandia Natl Labs, Ctr Biol & Mat Sci, Albuquerque, NM 87185 USA. RP Rogers, DM (reprint author), Sandia Natl Labs, Ctr Biol & Mat Sci, MS 0895, Albuquerque, NM 87185 USA. EM dmroge@sandia.gov; slrempe@sandia.gov NR 56 TC 1 Z9 1 U1 1 U2 19 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 402 AR 012014 DI 10.1088/1742-6596/402/1/012014 PG 16 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA BDS66 UT WOS:000314709800013 ER PT S AU Staar, P Maier, TA Schulthess, TC AF Staar, Peter Maier, Thomas A. Schulthess, Thomas C. BE Stocks, GM Troparevsky, MC TI Efficient non-equidistant FFT approach to the measurement of single- and two-particle quantities in continuous time Quantum Monte Carlo methods SO IUPAP C20 CONFERENCE ON COMPUTATIONAL PHYSICS (CCP 2011) SE Journal of Physics Conference Series LA English DT Proceedings Paper CT 23rd IUPAP C20 Conference on Computational Physics (CCP) CY OCT 30-NOV 03, 2011 CL Gatlinburg, TN SP Int Union Pure & Appl Phys (IUPAP), Int Union Pure & Appl Phys (IUPAP), Commiss Computat Phys (C20), Amer Phys Soc, Div Computat Phys (APS-DCOMP), Oak Ridge Natl Lab (ORNL), Ctr Defect Phys (CDP), Univ Tennessee (UT)/ORNL, Joint Inst Computat Sci (JICS), Cray, Inc ID IMPURITY MODELS AB Continuous time cluster solvers allow us to measure single-and two-particle Greens functions in the Matsubara frequency domain with unprecedented accuracy. Currently, the usage of the two-particle functions is limited due to a lack of an efficient measurement method that can deal with the random times of the vertices. In this paper, we show how the Non-equidistant Fast Fourier Transform (NFFT) algorithm can be modified in order to obtain a very efficient measurement algorithm. For the single particle case, we propose a delayed-NFFT (d-NFFT) scheme, which reduces the arithmetical operations from O(N log (N)) in NFFT to O(N), a huge improvement compared to the standard O(N-2) of the Non-equidistant Discrete Fourier Transform (NDFT), currently used in most continuous time cluster solvers. For the two-particle case, we discuss how the NFFT can be applied to measure the two-particle Greens functions and how to exploit its properties to further optimize the NFFT. We then apply these algorithms to the half-filled 2D Hubbard model at U/t = 8 in order to study the anti-ferromagnetic transition. In particular, we confirm the logarithmic decay of the Neel-temperatures versus cluster-sizes in accordance with the Mermin-Wagner theorem. C1 [Staar, Peter; Schulthess, Thomas C.] ETH, Inst Theoret Phys, Wolfgang Pauli Str 27, CH-8093 Zurich, Switzerland. [Maier, Thomas A.; Schulthess, Thomas C.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. [Maier, Thomas A.; Schulthess, Thomas C.] Ctr Nanophase Mat Sci, Comp Sci & Math Div, Oak Ridge, TN 37831 USA. RP Staar, P (reprint author), ETH, Inst Theoret Phys, Wolfgang Pauli Str 27, CH-8093 Zurich, Switzerland. RI Maier, Thomas/F-6759-2012 OI Maier, Thomas/0000-0002-1424-9996 FU Laboratory Directed Research and Development; Center for Nanophase Materials Sciences; Division for Scientific User Facilities of the Office of Basic Energy Sciences; National Center for Computational Sciences (NCCS) of ORNL; Swiss National Super computing Center (CSCS) in Lugano, Switzerland FX Workat Oak Ridge National Laboratory (ORNL) was supported by the Laboratory Directed Research and Development fund and the Center for Nanophase Materials Sciences, which is sponsored by the Division for Scientific User Facilities of the Office of Basic Energy Sciences. Computational resources at the National Center for Computational Sciences (NCCS) of ORNL and the Swiss National Super computing Center (CSCS) in Lugano, Switzerland were used for the simulations NR 15 TC 4 Z9 4 U1 0 U2 6 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 1742-6588 J9 J PHYS CONF SER PY 2012 VL 402 AR 012015 DI 10.1088/1742-6596/402/1/012015 PG 13 WC Physics, Multidisciplinary; Physics, Mathematical SC Physics GA BDS66 UT WOS:000314709800014 ER PT S AU Anderson, J Freeman, J Los, S Whitmore, J AF Anderson, Jacob Freeman, James Los, Sergey Whitmore, Juliana CA CMS HCAL Collaboration BE Liu, T TI Upgrade of the CMS Hadron Outer Calorimeter with SIPMs SO PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON TECHNOLOGY AND INSTRUMENTATION IN PARTICLE PHYSICS (TIPP 2011) SE Physics Procedia LA English DT Proceedings Paper CT 2nd International Conference on Technology and Instrumentation in Particle Physics (TIPP) CY JUN 09-14, 2011 CL Chicago, IL SP Fermilab, NSF, Fermi Res Alliance, APS Phys, U S Dept Energy, Argonne Natl Lab, Int Union Pure & Appl Phys (IUPAP) DE SIPM; CMS; Calorimeter; Hadron ID PERFORMANCE; DESIGN AB The CMS Hadron Outer Calorimeter (HO) is undergoing an upgrade to replace the existing hybrid photodetectors (HPDs) with silicon photo-multipliers (SIPMs). The chosen device is the Hamamatsu 3 x 3 mm(2) 50 mu m pitch MPPC. The system has been developed to be a "drop-in" replacement of the HPDs. A complete control system of bias voltage generation, leakage current monitoring, temperature monitoring, and temperature control using solid state Peltier coolers has been developed and tested. 108 channels of the system have been installed into CMS and operated for more than 2 years. The complete system of about 2200 channels is in production and will be installed in the next LHC long shut-down scheduled for 2013. (C) 2012 Published by Elsevier B.V. Selection and/or peer review under responsibility of the organizing committee for TIPP 11. C1 [Anderson, Jacob; Freeman, James; Los, Sergey; Whitmore, Juliana; CMS HCAL Collaboration] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Anderson, J (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM andersj@fnal.gov NR 8 TC 4 Z9 4 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1875-3892 J9 PHYSCS PROC PY 2012 VL 37 BP 72 EP 78 DI 10.1016/j.phpro.2012.02.358 PG 7 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDA98 UT WOS:000312408100009 ER PT S AU Terentiev, NK Di Benedetto, V Gatto, C Mazzacane, A Mokhov, NV Striganov, SI AF Terentiev, N. K. Di Benedetto, V. Gatto, C. Mazzacane, A. Mokhov, N. V. Striganov, S. I. BE Liu, T TI ILCRoot tracker and vertex detector hits response to MARS15 simulated backgrounds in the muon collider SO PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON TECHNOLOGY AND INSTRUMENTATION IN PARTICLE PHYSICS (TIPP 2011) SE Physics Procedia LA English DT Proceedings Paper CT 2nd International Conference on Technology and Instrumentation in Particle Physics (TIPP) CY JUN 09-14, 2011 CL Chicago, IL SP Fermilab, NSF, Fermi Res Alliance, APS Phys, U S Dept Energy, Argonne Natl Lab, Int Union Pure & Appl Phys (IUPAP) DE muon collider background; MARS15; ILCRoot; Si vertex and tracking detectors hits simulation AB Results from a simulation of the background for a muon collider, and the hits response of a silicon tracking detector to this background are presented. The background caused by decays of the 750 GeV/c beam mu(+) and mu(-) was simulated using the MARS15 program, which included the infrastructure of the beam line elements near the detector and the 10 degrees nozzles that shield the detector from this background. The ILCRoot framework, along with the Geant4 program, was used to simulate the hits response of the tracker and vertex silicon detectors to the muon-decay background remaining after the shielding nozzles. Results include the hit distributions in these detectors, the fractions of type-specific background particles producing these hits and illustrate the use of timing of the hits to suppress the muon beam background. (C) 2012 Published by Elsevier B.V. Selection and/or peer review under responsibility of the organizing committee for TIPP 11. C1 [Terentiev, N. K.] Carnegie Mellon Univ, 5000 Forbes Ave, Pittsburgh, PA 15213 USA. [Di Benedetto, V.] Univ Salento, Inst Nazl Fis Nucl INFN, Lecce, Italy. [Gatto, C.] Complesso Univ Monte Sant Angelo, Inst Nazl Fis Nucl INFN, Sez Napoli, I-80126 Naples, Italy. [Mazzacane, A.; Mokhov, N. V.; Striganov, S. I.] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Terentiev, NK (reprint author), Carnegie Mellon Univ, 5000 Forbes Ave, Pittsburgh, PA 15213 USA. EM teren@fnal.gov FU Fermi Research Alliance, LLC [AC02- 07CH11359]; U. S. Department of Energy FX Supported by Fermi Research Alliance, LLC under contract No. DE- AC02- 07CH11359 with the U. S. Department of Energy NR 9 TC 0 Z9 0 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1875-3892 J9 PHYSCS PROC PY 2012 VL 37 BP 104 EP 110 DI 10.1016/j.phpro.2012.03.705 PG 7 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDA98 UT WOS:000312408100013 ER PT S AU Cheung, HWK AF Cheung, H. W. K. CA CMS Collaboration BE Liu, T TI CMS: Present Status, Limitations, and Upgrade Plans SO PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON TECHNOLOGY AND INSTRUMENTATION IN PARTICLE PHYSICS (TIPP 2011) SE Physics Procedia LA English DT Proceedings Paper CT 2nd International Conference on Technology and Instrumentation in Particle Physics (TIPP) CY JUN 09-14, 2011 CL Chicago, IL SP Fermilab, NSF, Fermi Res Alliance, APS Phys, U S Dept Energy, Argonne Natl Lab, Int Union Pure & Appl Phys (IUPAP) DE LHC; CMS; upgrade AB An overview of the CMS upgrade plans will be presented. A brief status of the CMS detector will be given, covering some of the issues we have so far experienced. This will be followed by an overview of the various CMS upgrades planned, covering the main motivations for them, and the various R&D efforts for the possibilities under study. (C) 2012 Published by Elsevier B.V. Selection and/or peer review under responsibility of the organizing committee for TIPP 11. C1 [Cheung, H. W. K.; CMS Collaboration] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Cheung, HWK (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. EM cheung@fnal.gov NR 17 TC 0 Z9 0 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1875-3892 J9 PHYSCS PROC PY 2012 VL 37 BP 128 EP 137 DI 10.1016/j.phpro.2012.02.362 PG 10 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDA98 UT WOS:000312408100016 ER PT S AU Anderson, J Freeman, J Whitmore, J AF Anderson, Jake Freeman, Jim Whitmore, Juliana CA CMS HCAL Collaboration BE Liu, T TI Progress on the Upgrade of the CMS Hadron Calorimeter Front-End Electronics SO PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON TECHNOLOGY AND INSTRUMENTATION IN PARTICLE PHYSICS (TIPP 2011) SE Physics Procedia LA English DT Proceedings Paper CT 2nd International Conference on Technology and Instrumentation in Particle Physics (TIPP) CY JUN 09-14, 2011 CL Chicago, IL SP Fermilab, NSF, Fermi Res Alliance, APS Phys, U S Dept Energy, Argonne Natl Lab, Int Union Pure & Appl Phys (IUPAP) DE CMS; Hadron; Calorimeter; Front-End; Electronics; Upgrade; SLHC AB We present a scheme to upgrade the CMS HCAL front-end electronics in the second long shutdown to upgrade the LHC (LS2), which is expected to occur around 2018. The HCAL electronics upgrade is required to handle the major instantaneous luminosity increase (up to 5 * 10(34) cm(-2) s(-1)) and an expected integrated luminosity of similar to 3000 fb(-1). A key aspect of the HCAL upgrade is to read out longitudinal segmentation information to improve background rejection, energy resolution, and electron isolation at the L1 trigger. This paper focuses on the requirements for the new electronics and on the proposed solutions. The requirements include increased channel count, additional timing capabilities, and additional redundancy. The electronics are required to operate in a high radiation/high magnetic field environment and are constrained by the existing infrastructure (existing on-detector custom crates, legacy optical fiber, existing water cooling plant, tight trigger latency requirement). The proposed solutions span from chip level to system level. They include the development of a new ASIC ADC, the design and testing of higher speed transmitters to handle the increased data volume, the evaluation and use of circuits from other developments, evaluation of commercial FPGAs, better thermal design, and improvements in the overall readout architecture. We will report on the progress of the designs for these upgraded systems, along with performance requirements and initial design studies. (C) 2012 Published by Elsevier B.V. Selection and/or peer review under responsibility of the organizing committee for TIPP 11. C1 [Anderson, Jake; Freeman, Jim; Whitmore, Juliana] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Whitmore, J (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM jaws@fnal.gov NR 13 TC 0 Z9 0 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1875-3892 J9 PHYSCS PROC PY 2012 VL 37 BP 190 EP 197 DI 10.1016/j.phpro.2012.03.708 PG 8 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDA98 UT WOS:000312408100023 ER PT S AU Bonvicini, W Bosisio, L Cauz, D Cole, S Driutti, A Dychkant, S Fisk, G Fitzpatrick, T Guiterrez, A Hedin, D Iori, M Karchin, P McKenna, M Para, A Pauletta, G Rashevskaya, A Ramberg, E Rubinov, P Santi, L Shea, R Soha, A Viti, I Wayne, M AF Bonvicini, W. Bosisio, L. Cauz, D. Cole, S. Driutti, A. Dychkant, S. Fisk, G. Fitzpatrick, T. Guiterrez, A. Hedin, D. Iori, M. Karchin, P. McKenna, M. Para, A. Pauletta, G. Rashevskaya, A. Ramberg, E. Rubinov, P. Santi, L. Shea, R. Soha, A. Viti, I. Wayne, M. BE Liu, T TI Scintillator - based muon-detector/tail-catcher with SiPM readout SO PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON TECHNOLOGY AND INSTRUMENTATION IN PARTICLE PHYSICS (TIPP 2011) SE Physics Procedia LA English DT Proceedings Paper CT 2nd International Conference on Technology and Instrumentation in Particle Physics (TIPP) CY JUN 09-14, 2011 CL Chicago, IL SP Fermilab, NSF, Fermi Res Alliance, APS Phys, U S Dept Energy, Argonne Natl Lab, Int Union Pure & Appl Phys (IUPAP) DE Muon detectors; calorimeter tail-catchers; Silicon Photomultipliers AB Extruded scintillator with wavelength shifting (wls) fiber for light collection and silicon avalanche photo-detection (SiPM), followed by modest amplification remains an attractive candidate for large area counters such as are required for muon detectors/tail catchers for collider detectors. We report on R & D for the optimization of such detectors which has included the development of ad hoc SiPMs and frontend electronics with 12 bit waveform digitization at 100 - 200 MHz. Bias voltage is generated locally and provision is made for on board data storage and fast transfer to a local PC for immediate analysis. In addition to describing the data collection and counter assembly we will present representative data results from tests performed at the Fermilab Test Beam Facility. (C) 2012 Published by Elsevier B.V. Selection and/or peer review under responsibility of the organizing committee for TIPP 11. C1 [Cauz, D.; Pauletta, G.; Santi, L.] Univ Udine, I-33100 Udine, Italy. [Bonvicini, W.; Bosisio, L.; Driutti, A.; Fitzpatrick, T.; Rashevskaya, A.] Ist Nazl Fis Nucl, Trieste, Italy. [Bosisio, L.; Driutti, A.] Univ Trieste, Trieste, Italy. [Cauz, D.; Santi, L.] INFN Udine, Udine, Italy. [Cole, S.; Dychkant, S.; Hedin, D.; Shea, R.; Viti, I.] Northern Univ Illinois, De Kalb, IL USA. [Fisk, G.; Para, A.; Ramberg, E.; Rubinov, P.; Soha, A.] Fermilab Natl Accelerator Lab, Batavia, IL USA. [Guiterrez, A.; Karchin, P.] Wayne State Univ, Detroit, MI USA. [McKenna, M.; Wayne, M.] Univ Notre Dame, Notre Dame, IN USA. [Iori, M.] Univ Roma 1, Rome, Italy. [Iori, M.] INFN Roma, Rome, Italy. RP Pauletta, G (reprint author), Univ Udine, I-33100 Udine, Italy. EM Giovanni.pauletta@uniud.it OI Hedin, David/0000-0001-9984-215X FU Fermilab scientific and technical staff; US (DOE, NSF); Italian (INFN, GV) Funding Agencies FX We acknowledge the support of the Fermilab scientific and technical staff in the preparation and execution of the measurements reported and of the US (DOE, NSF) and Italian (INFN, GV) Funding Agencies for making them possible. NR 8 TC 0 Z9 0 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1875-3892 J9 PHYSCS PROC PY 2012 VL 37 BP 279 EP 286 DI 10.1016/j.phpro.2012.02.375 PG 8 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDA98 UT WOS:000312408100035 ER PT S AU Bilki, B Onel, Y Para, A Pauletta, G Rubinov, P Vasilas, I Wenzel, H AF Bilki, B. Onel, Y. Para, A. Pauletta, G. Rubinov, P. Vasilas, I. Wenzel, H. BE Liu, T TI Total Absorption Dual Readout Calorimetry R&D SO PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON TECHNOLOGY AND INSTRUMENTATION IN PARTICLE PHYSICS (TIPP 2011) SE Physics Procedia LA English DT Proceedings Paper CT 2nd International Conference on Technology and Instrumentation in Particle Physics (TIPP) CY JUN 09-14, 2011 CL Chicago, IL SP Fermilab, NSF, Fermi Res Alliance, APS Phys, U S Dept Energy, Argonne Natl Lab, Int Union Pure & Appl Phys (IUPAP) DE Dual readout calorimetry; Crystal calorimetry; Total absorption calorimetry; SiPM detectors; Cerenkov detectors; Scintillation detectors AB This calorimetry R&D focuses on establishing a proof of concept for totally active hadron calorimetry. The research program involves evaluating the performance of the different crystal and glass samples in combination with different light collection and readout alternatives to optimize simultaneous collection of Cerenkov and scintillation light components for application of the Dual Readout technique to total absorption calorimetry. We performed initial studies in two short test beam phases in April and November 2010 at Fermilab. Here we present first measurements from these two beam tests. (C) 2012 Published by Elsevier B.V. Selection and/or peer review under responsibility of the organizing committee for TIPP 11. C1 [Bilki, B.; Onel, Y.] Univ Iowa, Iowa City, IA 52242 USA. [Para, A.; Rubinov, P.; Wenzel, H.] Fermilab Natl Accelerator Lab, Batavia, IL USA. [Pauletta, G.] INFN, Sez Trieste, Trieste, Italy. [Vasilas, I.] Univ Cyprus, Nicosia, Cyprus. RP Bilki, B (reprint author), Univ Iowa, Iowa City, IA 52242 USA. EM burak-bilki@uiowa.edu NR 0 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1875-3892 J9 PHYSCS PROC PY 2012 VL 37 BP 309 EP 316 DI 10.1016/j.phpro.2012.02.382 PG 8 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDA98 UT WOS:000312408100039 ER PT S AU Repond, J AF Repond, Jose CA CALICE Collaboration BE Liu, T TI Analysis of muon events in the DHCAL SO PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON TECHNOLOGY AND INSTRUMENTATION IN PARTICLE PHYSICS (TIPP 2011) SE Physics Procedia LA English DT Proceedings Paper CT 2nd International Conference on Technology and Instrumentation in Particle Physics (TIPP) CY JUN 09-14, 2011 CL Chicago, IL SP Fermilab, NSF, Fermi Res Alliance, APS Phys, U S Dept Energy, Argonne Natl Lab, Int Union Pure & Appl Phys (IUPAP) DE Calorimetry; Resistive Plate Chambers; Particle Flow Algorithms; Calibration; Muons AB The Digital Hadron Calorimeter (DHCAL) is a large prototype of an imaging calorimeter using Resistive Plate Chambers (RPCs) as active media. The readout is segmented into 1x1 cm(2) pads, each with a single bit resolution, hence the denomination of digital. The total channel count is close to 500,000. The DHCAL construction and assembly was completed in fall 2010, followed by a series of test beam campaigns in the FTBF test beam at Fermilab. In this paper we report on the analysis of events collected with the broadband muon beam. These events are utilized to geometrically align the layers horizontally and vertically, to establish the response as function of position on a single readout pad, and to measure the performance characteristics of the RPCs, i.e. the efficiency and average pad multiplicity. The latter were measured in both 'clean' regions of the detector, i.e. away from structures such as the rims of the chambers, and as function of position on the entire vertical plane. In addition, the paper reviews the preliminary measurements of the noise rate in the detector. (C) 2012 Published by Elsevier B.V. Selection and/or peer review under responsibility of the organizing committee for TIPP 11. C1 [Repond, Jose] Argonne Natl Lab, Argonne, IL 60439 USA. RP Repond, J (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM repond@hep.anl.gov NR 4 TC 1 Z9 1 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1875-3892 J9 PHYSCS PROC PY 2012 VL 37 BP 347 EP 355 DI 10.1016/j.phpro.2012.02.384 PG 9 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDA98 UT WOS:000312408100044 ER PT S AU Francis, K AF Francis, Kurt CA CALICE Collaboration BE Liu, T TI Construction of the DHCAL SO PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON TECHNOLOGY AND INSTRUMENTATION IN PARTICLE PHYSICS (TIPP 2011) SE Physics Procedia LA English DT Proceedings Paper CT 2nd International Conference on Technology and Instrumentation in Particle Physics (TIPP) CY JUN 09-14, 2011 CL Chicago, IL SP Fermilab, NSF, Fermi Res Alliance, APS Phys, U S Dept Energy, Argonne Natl Lab, Int Union Pure & Appl Phys (IUPAP) DE Calorimetry; Resistive Plate Chambers; Particle Flow Algorithms; Calibration; Muons AB Particle Flow Algorithms (PFAs) have been proposed as a method of improving the jet energy resolution of future colliding beam detectors. PFAs require calorimeters with high granularity to enable three-dimensional imaging of events. The Calorimeter for the Linear Collider Collaboration (CALICE) is developing and testing prototypes of such highly segmented calorimeters. In this context, a large prototype of a Digital Hadron Calorimeter (DHCAL) was developed and constructed by a group led by Argonne National Laboratory. The DHCAL consists of 52 layers, instrumented with Resistive Plate Chambers (RPCs) and interleaved with steel absorber plates. The RPCs are read out by 1 x 1 cm(2) pads with a 1-bit resolution (digital readout). The DHCAL prototype has approximately 480,000 readout channels. This talk reports on the design, construction and commissioning of the DHCAL. The DHCAL was installed at the Fermilab Test Beam Facility in fall 2010 and data was collected through the summer 2011. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of the organizing committee for TIPP 11. C1 [Francis, Kurt] Argonne Natl Lab, Argonne, IL 60439 USA. RP Francis, K (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM kfrancis@hep.anl.gov NR 2 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1875-3892 J9 PHYSCS PROC PY 2012 VL 37 BP 384 EP 392 DI 10.1016/j.phpro.2012.02.377 PG 9 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDA98 UT WOS:000312408100048 ER PT S AU Xia, L AF Xia, Lei BE Liu, T TI Imaging Calorimeter: what have we learned so far SO PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON TECHNOLOGY AND INSTRUMENTATION IN PARTICLE PHYSICS (TIPP 2011) SE Physics Procedia LA English DT Proceedings Paper CT 2nd International Conference on Technology and Instrumentation in Particle Physics (TIPP) CY JUN 09-14, 2011 CL Chicago, IL SP Fermilab, NSF, Fermi Res Alliance, APS Phys, U S Dept Energy, Argonne Natl Lab, Int Union Pure & Appl Phys (IUPAP) DE PFA; imaging calorimeter; lepton collider; jet energy resolution AB Particle Flow Algorithms (PFAs) have been applied to existing detectors to improve the measurement of hadronic jets in colliding beam experiments. For future experiments, such as a TeV lepton collider, detector concepts optimized for the application of PFAs are being developed. These concepts require so-called imaging calorimeters, with unprecedented granularity. We will review the various recent developments of such highly granular calorimeters. (C) 2011 Published by Elsevier BV. Selection and/or peer-review under responsibility of the organizing committee for TIPP 2011. C1 Argonne Natl Lab, HEP Div, Argonne, IL 60439 USA. RP Xia, L (reprint author), Argonne Natl Lab, HEP Div, 362 HEP,9700 S Cass Ave, Argonne, IL 60439 USA. EM lxia@hep.anl.gov NR 5 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1875-3892 J9 PHYSCS PROC PY 2012 VL 37 BP 410 EP 420 DI 10.1016/j.phpro.2012.02.388 PG 11 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDA98 UT WOS:000312408100051 ER PT S AU Yamaoka, J Feng, H Garcia-Sciveres, M Jaegle, I Kadyk, J Nguyen, Y Rosen, M Ross, S Thorpe, T Vahsen, S AF Yamaoka, J. Feng, H. Garcia-Sciveres, M. Jaegle, I. Kadyk, J. Nguyen, Y. Rosen, M. Ross, S. Thorpe, T. Vahsen, S. BE Liu, T TI Application of Time Projection Chambers with GEMs and Pixels to WIMP Searches and Fast Neutron Detection SO PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON TECHNOLOGY AND INSTRUMENTATION IN PARTICLE PHYSICS (TIPP 2011) SE Physics Procedia LA English DT Proceedings Paper CT 2nd International Conference on Technology and Instrumentation in Particle Physics (TIPP) CY JUN 09-14, 2011 CL Chicago, IL SP Fermilab, NSF, Fermi Res Alliance, APS Phys, U S Dept Energy, Argonne Natl Lab, Int Union Pure & Appl Phys (IUPAP) DE Time Projection Chambers (TPC); Pixel Electronics; Gas Electron Multipliers (GEM) ID READOUT; CHIP; TPC AB We present work on the detection of neutral particles via nuclear recoils in gas-filled Time Projection Chambers (TPCs). We employ Gas Electron Multipliers (GEMs) to amplify the signal and silicon pixel electronics to detect the avalanche charge. These technologies allow ionization in the target gas to be detected with low noise, improved position and time resolution, and high efficiency. We review experimental results obtained in previous years, and report on ongoing simulation studies and construction of the first prototype at the University of Hawaii. We also present prospects of using such detectors to perform direction-sensitive searches for WIMP dark matter and fast neutron from fissionable material. (C) 2012 Published by Elsevier B. V. Selection and/or peer review under responsibility of the organizing committee for TIPP 11. C1 [Yamaoka, J.; Feng, H.; Jaegle, I.; Rosen, M.; Ross, S.; Thorpe, T.; Vahsen, S.] Univ Hawaii Manoa, 2505 Correa Rd, Honolulu, HI 96822 USA. [Garcia-Sciveres, M.; Kadyk, J.; Nguyen, Y.] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Yamaoka, J (reprint author), Univ Hawaii Manoa, 2505 Correa Rd, Honolulu, HI 96822 USA. EM yamaoka@phys.hawaii.edu NR 17 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1875-3892 J9 PHYSCS PROC PY 2012 VL 37 BP 567 EP 574 DI 10.1016/j.phpro.2012.03.714 PG 8 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDA98 UT WOS:000312408100073 ER PT S AU Cecil, T Miceli, A Gades, L Datesman, A Quaranta, O Yefremenko, V Novosad, V Mazin, B AF Cecil, T. Miceli, A. Gades, L. Datesman, A. Quaranta, O. Yefremenko, V. Novosad, V. Mazin, B. BE Liu, T TI Kinetic Inductance Detectors for X-Ray Spectroscopy SO PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON TECHNOLOGY AND INSTRUMENTATION IN PARTICLE PHYSICS (TIPP 2011) SE Physics Procedia LA English DT Proceedings Paper CT 2nd International Conference on Technology and Instrumentation in Particle Physics (TIPP) CY JUN 09-14, 2011 CL Chicago, IL SP Fermilab, NSF, Fermi Res Alliance, APS Phys, U S Dept Energy, Argonne Natl Lab, Int Union Pure & Appl Phys (IUPAP) DE kinetic inductance detector; x-ray spectroscopy AB The lack of efficient x-ray detectors is often the main factor limiting the effective use of ever more powerful synchrotron light sources. Spectroscopic X-ray detectors are used for a wide variety of synchrotron experiments including X-ray micro/nano-probes and X-ray absorption spectroscopy for biology and geophysical applications. The current state-of-art spectroscopic X-ray detectors are semiconductor devices, and their energy resolutions are approaching their theoretical limit of about 100eV at 6 keV. We describe a detector research and development program to develop the next-generation of high-resolution spectroscopic X-ray detectors using superconducting Kinetic Inductance Detectors (KIDs). With a required energy per charge carrier four orders of magnitude smaller than that of Si, superconducting detectors offer up to two orders of magnitude increase in energy resolution. In addition, KIDs can be optimized for detection of photons ranging in energy from hard X-ray to IR. (C) 2012 Published by Elsevier B. V. Selection and/or peer review under responsibility of the organizing committee for TIPP 11. C1 [Cecil, T.; Miceli, A.; Gades, L.; Datesman, A.; Quaranta, O.; Yefremenko, V.; Novosad, V.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Mazin, B.] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA. RP Cecil, T (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM cecil@aps.anl.gov RI Novosad, Valentyn/C-2018-2014; Mazin, Ben/B-8704-2011; Novosad, V /J-4843-2015 OI Mazin, Ben/0000-0003-0526-1114; FU U.S. Department of Energy; Office of Science; Office of Basic Energy Sciences [DE-AC02-06CH11357]; U.S. Department of Energy, Office of Science [DE-AC02-06CH11357] FX Use of the Center for Nanoscale Materials was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. Work at Argonne National Laboratory was supported by the U.S. Department of Energy, Office of Science under Contract No. DE-AC02-06CH11357. NR 18 TC 1 Z9 1 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1875-3892 J9 PHYSCS PROC PY 2012 VL 37 BP 697 EP 702 DI 10.1016/j.phpro.2012.03.719 PG 6 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDA98 UT WOS:000312408100090 ER PT S AU Diwan, M Dolph, J Ling, JJ Sharma, R Sexton, K Simos, N Tanaka, H Arnold, D Tabor, P Turner, S AF Diwan, Milind Dolph, Jeffrey Ling, Jiajie Sharma, Rahul Sexton, Kenneth Simos, Nikolaos Tanaka, Hidekazu Arnold, Douglas Tabor, Philip Turner, Stephen BE Liu, T TI Underwater Implosions of Large Format Photo-multiplier Tubes SO PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON TECHNOLOGY AND INSTRUMENTATION IN PARTICLE PHYSICS (TIPP 2011) SE Physics Procedia LA English DT Proceedings Paper CT 2nd International Conference on Technology and Instrumentation in Particle Physics (TIPP) CY JUN 09-14, 2011 CL Chicago, IL SP Fermilab, NSF, Fermi Res Alliance, APS Phys, U S Dept Energy, Argonne Natl Lab, Int Union Pure & Appl Phys (IUPAP) DE PMT; implosion; shock wave; simulation AB Large, deep, well shielded liquid detectors have become an important technology for the detection of neutrinos over a wide dynamic range of a few MeV to TeV. The critical component of this technology is the large format semi-hemispherical photo-multiplier tube with diameters in the range of 25 to 50 cm. The survival of an assembled array of these photo-multiplier tubes under high hydrostatic pressure is the subject of this study. These are the results from an R&D program which is intended to understand the modes of failure when a photo-multiplier tube implodes under hydrostatic pressure. Our tests include detailed measurements of the shock wave which results from the implosion of a photo-multiplier tube and a comparison of the test data to modern hydrodynamic simulation codes. Using these results we can extrapolate to other tube geometries and make recommendation on deployment of the photo-multiplier tubes in deep water detectors with a focus on risk mitigation from a tube implosion shock wave causing a chain reaction loss of multiple tubes. (C) 2012 Published by Elsevier B. V. Selection and/or peer review under responsibility of the organizing committee for TIPP 11. C1 [Diwan, Milind; Dolph, Jeffrey; Ling, Jiajie; Sharma, Rahul; Sexton, Kenneth; Simos, Nikolaos; Tanaka, Hidekazu] Brookhaven Natl Lab, Upton, NY 11973 USA. [Arnold, Douglas; Tabor, Philip; Turner, Stephen] Naval Underwater Warfare Ctr, Newport, RI 02841 USA. RP Ling, JJ (reprint author), P Box 5000 Bldg 510E, Upton, NY 11973 USA. EM jjling@bnl.gov RI Ling, Jiajie/I-9173-2014 OI Ling, Jiajie/0000-0003-2982-0670 FU US Department of Energy [DE-AC02-98CH10886] FX This work was supported by the US Department of Energy under contract number DE-AC02-98CH10886. We are grateful to the technical staff at the Naval Underwater Warfare Center. NR 9 TC 3 Z9 3 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1875-3892 J9 PHYSCS PROC PY 2012 VL 37 BP 715 EP 721 DI 10.1016/j.phpro.2012.03.721 PG 7 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDA98 UT WOS:000312408100093 ER PT S AU Mane, AU Peng, Q Elam, JW Bennis, DC Craven, CA Detarando, MA Escolas, JR Frisch, HJ Jokela, SJ McPhate, J Minot, MJ Siegmund, OHW Renaud, JM Wagner, RG Wetstein, MJ AF Mane, Anil U. Peng, Qing Elam, Jeffrey W. Bennis, Daniel C. Craven, Christopher A. Detarando, Michael A. Escolas, John R. Frisch, Henry J. Jokela, Slade J. McPhate, Jason Minot, Michael J. Siegmund, Oswald H. W. Renaud, Joseph M. Wagner, Robert G. Wetstein, Matthew J. BE Liu, T TI An atomic layer deposition method to fabricate economical and robust large area microchannel plates for photodetectors SO PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON TECHNOLOGY AND INSTRUMENTATION IN PARTICLE PHYSICS (TIPP 2011) SE Physics Procedia LA English DT Proceedings Paper CT 2nd International Conference on Technology and Instrumentation in Particle Physics (TIPP) CY JUN 09-14, 2011 CL Chicago, IL SP Fermilab, NSF, Fermi Res Alliance, APS Phys, U S Dept Energy, Argonne Natl Lab, Int Union Pure & Appl Phys (IUPAP) DE Atomic layer deposition; capillary arrays; microchannel plate; photodetector; secondary electron emission AB We demonstrate an economical and robust route to fabricate large-area microchannel plate (MCP) detectors which will open new opportunities in larger area MCP-based detector technologies. Using our newly developed bottom-up process flow, we have fabricated large area MCPs (8"x8"). We used Atomic Layer Deposition (ALD), a powerful and precise thin film deposition technique, to tailor the electrical resistance and secondary electron emission (SEE) properties of large area, low cost, borosilicate glass capillary arrays. The self limiting growth mechanism in ALD allows atomic level control over the thickness and composition of resistive and secondary electron emission (SEE) layers that can be deposited conformally on high aspect ratio capillary glass arrays. We have developed several robust and reliable ALD processes for the resistive coatings and SEE layers to give us precise control over the resistance in the target range for MCPs (10(6)-10(9)Omega) and SEE coefficient (up to 8). The MCPs are tested in stacks of one or two plates and exhibit gains as high as 10(7) for a pair of MCPs. This approach allows the functionalization of microporous, insulating substrates to produce MCPs with high gain and low noise. These capabilities allow separation of the substrate material properties from the amplification properties. We studied the various MCP parameters such as gain, background counts, and resistance as a function of the ALD process parameters. Here we describe a complete process flow to produce fully functionalized working large area MCPs. (C) 2012 Published by Elsevier B. V. Selection and/or peer review under responsibility of the organizing committee for TIPP 11. C1 [Mane, Anil U.; Peng, Qing; Elam, Jeffrey W.; Frisch, Henry J.; Jokela, Slade J.; Wagner, Robert G.; Wetstein, Matthew J.] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Frisch, Henry J.; Wetstein, Matthew J.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. [McPhate, Jason; Siegmund, Oswald H. W.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. [Bennis, Daniel C.; Craven, Christopher A.; Detarando, Michael A.; Escolas, John R.; Minot, Michael J.; Renaud, Joseph M.] Incom Inc, Charlton, MA 01507 USA. RP Mane, AU (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM amane@anl.gov RI peng, qing/I-2970-2013 FU U.S. Department of Energy Office of Science laboratory [DE-AC02-06CH11357] FX The submitted manuscript has been created by UChicago Argonne, LLC, Operator of Argonne National Laboratory ("Argonne"). Argonne, a U.S. Department of Energy Office of Science laboratory, is operated under Contract No. DE-AC02-06CH11357. The U.S. Government retains for itself, and others acting on its behalf, a paid- up nonexclusive, irrevocable worldwide license in said article to reproduce, prepare derivative works, distribute copies to the public, and perform publicly and display publicly, by or on behalf of the Government. The authors would like to thank Eileen Hahn, ( Fermi Lab) for the electrode deposition work, Hsien-Hau Wang for AFM analysis, and Electron microscopy was performed at the Electron Microscopy Centre at Argonne National Laboratory. NR 21 TC 17 Z9 17 U1 1 U2 9 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1875-3892 J9 PHYSCS PROC PY 2012 VL 37 BP 722 EP 732 DI 10.1016/j.phpro.2012.03.720 PG 11 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDA98 UT WOS:000312408100094 ER PT S AU Yusof, Z Attenkofer, K Demarteau, M Frisch, H Gregar, J Jelinsky, S Lee, SW McPhate, J Northrop, R Paramonov, A Ronzhin, A Sellberg, G Siegmund, O Wagner, R Walters, D Xie, JQ AF Yusof, Zikri Attenkofer, Klaus Demarteau, Marcel Frisch, Henry Gregar, Joe Jelinsky, Sharon Lee, Seon Woo McPhate, Jason Northrop, Richard Paramonov, Alexander Ronzhin, Anatoly Sellberg, Greg Siegmund, Oswald Wagner, Robert Walters, Dean Xie, Junqi CA LAPPD Collaboration BE Liu, T TI Development of an alkali transfer photocathode for large area microchannel plate-based photodetectors SO PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON TECHNOLOGY AND INSTRUMENTATION IN PARTICLE PHYSICS (TIPP 2011) SE Physics Procedia LA English DT Proceedings Paper CT 2nd International Conference on Technology and Instrumentation in Particle Physics (TIPP) CY JUN 09-14, 2011 CL Chicago, IL SP Fermilab, NSF, Fermi Res Alliance, APS Phys, U S Dept Energy, Argonne Natl Lab, Int Union Pure & Appl Phys (IUPAP) DE Alkali photocathode; transfer photocathode; large area photodetector; visible light photodetector AB The goal of the Large Area Picosecond Photodetector collaboration is to produce 8-inch by 8-inch microchannel plate-based photodetectors, with fast timing resolution of the order of 1-100 ps and spatial resolution of 0.1-10 mm. At Argonne, the transfer photocathode process being developed is on a recipe for manufacturing photomultiplier cathodes. Starting with a commercial PMT facility, the photocathode recipe and growth system will be scaled up using a custom-built glass vessel produce transfer photocathodes. This leads to the production of the 8-inch by 8-inch photocathode will be incorporated with the photodetector assembly system. (C) 2012 Published by Elsevier B. V. Selection and/or peer review under responsibility of the organizing committee for TIPP 11. C1 [Yusof, Zikri; Demarteau, Marcel; Frisch, Henry; Gregar, Joe; Lee, Seon Woo; Paramonov, Alexander; Wagner, Robert; Walters, Dean; Xie, Junqi] Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. [Attenkofer, Klaus; Frisch, Henry; Northrop, Richard] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. [Ronzhin, Anatoly; Sellberg, Greg] Fermi Natl Accelerator, Batavia, IL 60510 USA. [Jelinsky, Sharon; McPhate, Jason; Siegmund, Oswald] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. RP Yusof, Z (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM zyusof@anl.gov RI Xie, Junqi/J-8985-2012 FU U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences and Office of High Energy Physics [DE-AC0206CH11357] FX Work at Argonne National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences and Office of High Energy Physics under contract DE-AC0206CH11357. NR 12 TC 0 Z9 0 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1875-3892 J9 PHYSCS PROC PY 2012 VL 37 BP 733 EP 739 DI 10.1016/j.phpro.2012.02.416 PG 7 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDA98 UT WOS:000312408100095 ER PT S AU Jokela, SJ Veryovkin, IV Zinovev, AV Elam, JW Mane, AU Peng, Q Insepov, Z AF Jokela, Slade J. Veryovkin, Igor V. Zinovev, Alexander V. Elam, Jeffrey W. Mane, Anil U. Peng, Qing Insepov, Z. CA Large Area Picosecond BE Liu, T TI Secondary electron yield of emissive materials for large-area micro-channel plate detectors: surface composition and film thickness dependencies SO PROCEEDINGS OF THE 2ND INTERNATIONAL CONFERENCE ON TECHNOLOGY AND INSTRUMENTATION IN PARTICLE PHYSICS (TIPP 2011) SE Physics Procedia LA English DT Proceedings Paper CT 2nd International Conference on Technology and Instrumentation in Particle Physics (TIPP) CY JUN 09-14, 2011 CL Chicago, IL SP Fermilab, NSF, Fermi Res Alliance, APS Phys, U S Dept Energy, Argonne Natl Lab, Int Union Pure & Appl Phys (IUPAP) DE Secondary Electron Yield; Atomic Layer Deposition; Magnesium Oxide; Aluminum Oxide; XPS ID CARBON; LAYER AB The ongoing development of Atomic Layer Deposition (ALD) enables the use of relatively inexpensive and robust borosilicate micro-channel substrates for use as Micro-Channel Plates (MCPs). The surfaces of the channels in these glass plates are functionalized to control the conductivity as well as the Secondary Electron Yield (SEY). The extensive SEY data found in literature show significant variation for a given material depending on the apparatus, the measurement procedure, and the sample preparation and handling. We present systematic studies on the effects of film thickness and surface chemical composition on SEY. We have modified an existing ultra-high vacuum apparatus containing X-ray and Ultraviolet Photoelectron Spectrometers (XPS and UPS, respectively) by adding a modified Low Energy Electron Diffraction (LEED) module for SEY measurements. With these tools, we have characterized the secondary electron emissive properties for MgO, Al2O3, and multilayered MgO/TiO2 structures to serve as electron emissive layers in the channels of the MCPs. (C) 2012 Published by Elsevier B. V. Selection and/or peer review under responsibility of the organizing committee for TIPP 11. C1 [Jokela, Slade J.; Veryovkin, Igor V.; Zinovev, Alexander V.] Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. [Elam, Jeffrey W.; Mane, Anil U.; Peng, Qing] Argonne Natl Lab, Div Energy Syst, Argonne, IL 60439 USA. [Insepov, Z.] Argonne Natl Lab, Math & Comp Sci Div, Argonne, IL 60439 USA. RP Jokela, SJ (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. EM sjokela@anl.gov RI peng, qing/I-2970-2013; Insepov, Zinetula/L-2095-2013 OI Insepov, Zinetula/0000-0002-8079-6293 FU U.S. Department of Energy; Office of Science; Office of Basic Energy Sciences and Office of High Energy Physics [DE-AC0206CH11357] FX Work at Argonne National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences and Office of High Energy Physics under contract DE-AC0206CH11357. NR 16 TC 14 Z9 14 U1 2 U2 21 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1875-3892 J9 PHYSCS PROC PY 2012 VL 37 BP 740 EP 747 DI 10.1016/j.phpro.2012.03.718 PG 8 WC Physics, Applied; Physics, Particles & Fields SC Physics GA BDA98 UT WOS:000312408100096 ER EF