FN Thomson Reuters Web of Science™ VR 1.0 PT S AU Weissfloch, L Peller, M Weber, J Feldmann, HJ Senekowitsch-Schmidtke, R Tempel, K Coderre, JA Molls, M Reiser, M AF Weissfloch, L Peller, M Weber, J Feldmann, HJ Senekowitsch-Schmidtke, R Tempel, K Coderre, JA Molls, M Reiser, M BE Dunn, JF Swartz, HM TI Comparison study of oxygen-induced MRI-signal changes and pO(2) changes in murine tumors SO OXYGEN TRANSPORT TO TISSUE XXIV SE ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY LA English DT Article; Proceedings Paper CT 27th Annual Meeting of the International-Society-on-Oxygen-Transport-to-Tissue CY AUG 28-SEP 02, 1999 CL DARTMOUTH MED SCH, HANOVER, NEW HAMPSHIRE SP Int Soc Oxygen Transport Tissue HO DARTMOUTH MED SCH DE tumor; rodent; hyperoxia; oxygen tension measurement; pO(2); MRI AB The purpose of this study was to compare the results from oxygen-induced MR-signal intensity changes with polarographic pO(2) measurements in tumors. Balb-c mice with an intramuscular transplanted osteosarcoma were examined. To study the response of tumors to changes in oxygen supply, hyperoxia was induced by breathing pure oxygen for a short period. The examination of each animal started with T2* weighted MR1 followed by the pO(2) measurements (Eppendorf Histograph). During oxygen inhalation in all tumors, when the hypoxic tumor fraction drops, both areas of significant MR-signal intensity increase and decrease were observed in each animal. C1 Tech Univ Munich, Klinikum Rechts Isar, Dept Radiat Oncol, Munich, Germany. LMU Munich, Klinikum Grosshadern, Inst Diagnost Radiol, Munich, Germany. Tech Univ Munich, Klinikum Rechts Isar, Dept Nucl Med, Munich, Germany. LMU Munich, Fac Med Vet, Inst Pharmacol Toxicol & Pharm, Munich, Germany. Brookhaven Natl Lab, Dept Med, Upton, NY 11973 USA. RP Weissfloch, L (reprint author), Tech Univ Munich, Klinikum Rechts Isar, Dept Radiat Oncol, Munich, Germany. NR 6 TC 0 Z9 0 U1 0 U2 5 PU KLUWER ACADEMIC/PLENUM PUBL PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA SN 0065-2598 BN 0-306-47774-2 J9 ADV EXP MED BIOL JI Adv.Exp.Med.Biol. PY 2003 VL 530 BP 461 EP 465 PG 5 WC Medicine, Research & Experimental; Physiology SC Research & Experimental Medicine; Physiology GA BX70X UT WOS:000186182800043 PM 14562741 ER PT B AU Potok, T Phillips, L Pollock, R Loebl, A Sheldon, F AF Potok, T Phillips, L Pollock, R Loebl, A Sheldon, F BE Yoo, SM Youn, HY TI Suitability of agent-based systems for command and control in fault-tolerant, safety-critical responsive decision networks SO PARALLEL AND DISTRIBUTED COMPUTING SYSTEMS, PROCEEDINGS LA English DT Proceedings Paper CT 16th International Conference on Parallel and Distributed Computing Systems (PDCS 2003) CY AUG 13-15, 2003 CL RENO, NV SP Int Soc Comp & Their Applicat DE intelligent SW agents; fusion and decision support ID CHALLENGES; LANGUAGES AB We assess the novelty and maturity of software (SW) agent-based systems (ABS) for the Future Combat System (FCS) concept. The concept consists of troops, vehicles, communications, and weapon systems viewed as a "system of systems" [including net-centric command and control (C-2) capabilities]. In contrast to, a centralized, or platform-based architecture, FCS avoids decision-making/execution bottlenecks by combining intelligence gathering and analysis available at lower levels in the military hierarchy. ABS are particularly suitable in satisfying battle-space scalability, mobility, and security (SMS) expectations. A set of FCS SW requirements (SRs) was developed based on needs aligned with current computer science technology and inherent limitations. ABS advantages (i.e., SMS) are enabled mainly through a stronger messaging/coordination (MC) model. Such capabilities in an FCS environment do not currently exist, though a number of strong (analogous) agent-based systems have been deployed due to the lack of information fusion and decision support. Nevertheless, ABS can support most networked FCS C-2 requirements despite the lack of current empirical and theoretical validation. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Potok, T (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. NR 28 TC 1 Z9 1 U1 0 U2 1 PU INTERNATIONAL SOCIETY COMPUTER S & THEIR APPLICATIONS (ISCA) PI RALEIGH PA 8820 SIX FORKS ROAD, RALEIGH, NC 27615 USA BN 1-880843-48-X PY 2003 BP 283 EP 290 PG 8 WC Computer Science, Hardware & Architecture; Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA BX45C UT WOS:000185330200045 ER PT B AU Johnston, WE AF Johnston, WE BE Matsuno, K Ecer, A Periaux, J Satofuka, N Fox, P TI Multi-disciplinary simulations and computational and data grids SO PARALLEL COMPUTATIONAL FLUID DYNAMICS: NEW FRONTIERS AND MULTI-DISCIPLINARY APPLICATIONS, PROCEEDINGS LA English DT Proceedings Paper CT International Parallel Computational Fluid Dynamics Conference CY MAY 20-22, 2002 CL KANSAI SCI CITY, JAPAN SP Best Syst Inc, CD adapco Japan Co Ltd, Compaq Comp KK, Engineous Japan Inc, Fuji Res Inst Corp, Fujitsu Info Software Technol Ltd, Fujitsu Prime Software Technol Ltd, Fujitsu Ltd, Hewlett Packard Japan Ltd, Hitachi Ltd, IBM Japan Ltd, KGT Inc, NEC Corp, Nihon ESI KK, Platform Comp KK, Res Ctr Computat Mech Inc, SGI Japan Ltd, Tokyo Electron Ltd, Vinas Co Ltd DE special architectures AB Computational and Data "Grids" are middleware for building dynamically constructed problem solving environments using geographically and organizationally dispersed high performance computing and data handling resources. Grids also provide infrastructure for collaboration. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Johnston, WE (reprint author), Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. NR 32 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 0-444-50680-2 PY 2003 BP 13 EP 22 DI 10.1016/B978-044450680-1/50003-6 PG 10 WC Computer Science, Theory & Methods; Mechanics SC Computer Science; Mechanics GA BX04N UT WOS:000184048900002 ER PT S AU Trivedi, N Pedretti, KT Braun, TA Scheetz, TE Casavant, TL AF Trivedi, N Pedretti, KT Braun, TA Scheetz, TE Casavant, TL BE Malyshkin, V TI Alternative parallelization strategies in EST clustering SO PARALLEL COMPUTING TECHNOLOGIES, PROCEEDINGS SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT 7th International Conference on Parallel Computing Technologies (PaCT 2003) CY SEP 15-19, 2003 CL NIZHNI NOVGORD, RUSSIA SP Russian Acad Sci, Russian Fund Basic Res, Russian State Comm Higher Educ, IBM, Intel ID EXPRESSED SEQUENCE TAGS AB One of the fundamental components of large-scale gene discovery projects is that of clustering of Expressed Sequence Tags (ESTs) from complementary DNA (cDNA) clone libraries. Clustering is used to create non-redundant catalogs and indices of these sequences. In particular, clustering of ESTs is frequently used to estimate the number of genes derived from cDNA-based gene discovery efforts. This paper presents a novel parallel extension to an EST clustering program, UIcluster4, that incorporates alternative splicing information and a new parallelization strategy. The results are compared to other parallelized EST clustering systems in terms of overall processing time and in accuracy of the resulting clustering. C1 Univ Iowa, Iowa City, IA 52242 USA. Sandia Natl Labs, Albuquerque, NM 87123 USA. RP Trivedi, N (reprint author), Univ Iowa, Iowa City, IA 52242 USA. NR 9 TC 1 Z9 1 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-40673-5 J9 LECT NOTES COMPUT SC PY 2003 VL 2763 BP 384 EP 393 PG 10 WC Computer Science, Theory & Methods SC Computer Science GA BX65C UT WOS:000185994300036 ER PT S AU Mantsch, PM AF Mantsch, PM BE Gorham, PW TI The Pierre Auger Project: An overview SO PARTICLE ASTROPHYSICS INSTRUMENTATION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Particle Astrophysics Instrumentation CY AUG 22-23, 2002 CL WAIKOLOA, HI SP SPIE DE cosmic rays; air shower; surface array; fluorescence detector; GZK cutoff; cosmic microwave back-ground ID SPECTRUM AB The Southern Hemisphere site of the Pierre Auger Observatory is now under construction in Argentina by a collaboration of 50 institutions in 16 countries. The objective of the Auger Project is to make a high statistics measurement of cosmic rays above 10(19) eV. The observatory will record extensive air showers induced by these cosmic rays incident on the atmosphere. The measurement will include energy, direction and composition of the primary particles. The engineering phase is now complete and full construction has begun. The search for the source of the highest energy cosmic rays is one of the most interesting problems in astrophysics. Following the discovery of the cosmic microwave background, Greisen and, independently, Zatsepin and Kuzmin realized that this background radiation would make space opaque to cosmic rays of very high energy. Nevertheless over the past 30 years several tens of events were recorded with energies above the Greisen, Zatsepin, Kuzmin (GZK) cutoff (about 5 x 10(19) eV) including a number above 10(20) eV. These events present a conundrum. Because of the GZK cut off these super high-energy events must come from nearby, less than about 50 Mpc. In addition the cosmic acceleration mechanism for achieving these energies is very difficult to conceive. Yet even though particles of these energies are only slightly deflected by galactic and extragalactic magnetic fields, none clearly points back to a source sufficiently violent to be a candidate source. The Auger Observatory finished its engineering development phase at the end of 2001. The "Engineering Array" consists of 40 surface particle detector stations and two prototype air fluorescence telescopes. The Observatory, when complete, will have a 1600 detector surface array covering 3000 km**2 overlooked by 24 fluorescence telescopes. The Engineering Array has demonstrated that all of the detector systems perform as well or better than expected. Recently the Observatory has recorded a number of cosmic ray events simultaneously with both the fluorescence and surface detectors. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Mantsch, PM (reprint author), Fermilab Natl Accelerator Lab, Box 500, Batavia, IL 60510 USA. NR 5 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 0-8194-4637-8 J9 P SOC PHOTO-OPT INS PY 2003 VL 4858 BP 115 EP 120 DI 10.1117/12.458047 PG 6 WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics GA BW51L UT WOS:000182251600012 ER PT S AU Sinnis, G AF Sinnis, G CA Milagro Collaboration BE Gorham, PW TI The Milagro all-sky TeV gamma ray observatory SO PARTICLE ASTROPHYSICS INSTRUMENTATION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Particle Astrophysics Instrumentation CY AUG 22-23, 2002 CL WAIKOLOA, HI SP SPIE DE TeV gamma rays; water-Cherenkov detector; all-sky monitor ID CRAB-NEBULA AB Milagro is a water Cherenkov telescope sensitive to gamma rays with energies above 100 GeV. Unlike air-Cherenkov telescopes, Milagro continuously views the entire overhead sky. This capability makes it well suited to search for transient phenomena such as gamma-ray bursts and to discover new phenomena. I will review the design and construction of Milagro, detail the sensitivity of the instrument, including a discussion of background rejection with Milagro. Recent and ongoing upgrades to the instrument are discussed. The paper concludes with a summary of some recent physics results with Milagro. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Sinnis, G (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. NR 13 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 0-8194-4637-8 J9 P SOC PHOTO-OPT INS PY 2003 VL 4858 BP 358 EP 366 PG 9 WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics GA BW51L UT WOS:000182251600037 ER PT S AU Harris, DA AF Harris, DA BE Nieves, JF Leung, CN TI Oscillation measurements from accelerators: a global status report SO PARTICLE PHYSICS AND COSMOLOGY SE AIP Conference Proceedings LA English DT Proceedings Paper CT 3rd Tropical Workshop on Particle Physics and Cosmology CY AUG 19-23, 2002 CL SAN JUAN, PR SP Univ Puerto Rico, US DOE ID ART.; SEARCH; MODEL AB This report gives the status of the most recent round of accelerator-based experiments to release neutrino oscillation measurements or limits, as well as those currently planned in the near future. The report concludes with a discussion of a few of the many possible future experiments to take the next steps in this rapidly-evolving field. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. EM dharris@fnal.gov NR 28 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 0-7354-0112-8 J9 AIP CONF PROC PY 2003 VL 655 BP 42 EP 57 PG 16 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BW31Z UT WOS:000181554200003 ER PT S AU McGregor, G AF McGregor, G BE Nieves, JF Leung, CN TI The MiniBooNE experiment: Status and plans SO PARTICLE PHYSICS AND COSMOLOGY SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Tropical Workshop on Particle Physics and Cosmology CY AUG 19-23, 2002 CL SAN JUAN, PR SP Univ Puerto Rico, US DOE ID NEUTRINO OSCILLATIONS; (NU)OVER-BAR(MU)->(NU)OVER-BAR(E) AB The MiniBooNE experiment has recently started a search for v(mu) --> v(e) oscillations at Fermilab. This will provide a definitive test of the LSND results which show evidence for neutrino oscillation. The MiniBooNE neutrino source and detector are both now operational and data taking has begun. We describe the experiment, report on the status, and show the expected sensitivity to neutrino oscillations. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP McGregor, G (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 9 TC 11 Z9 11 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 0-7354-0112-8 J9 AIP CONF PROC PY 2003 VL 655 BP 58 EP 67 PG 10 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BW31Z UT WOS:000181554200004 ER PT S AU Linder, EV AF Linder, EV BE Nieves, JF Leung, CN TI Dark energy, expansion history of the universe, and SNAP SO PARTICLE PHYSICS AND COSMOLOGY SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Tropical Workshop on Particle Physics and Cosmology CY AUG 19-23, 2002 CL SAN JUAN, PR SP Univ Puerto Rico, US DOE ID SUPERNOVAE AB Precision distance-redshift observations can map out the recent expansion history of the universe, including the present acceleration and the transition to matter dominated deceleration. The proposed Supernova/Acceleration Probe (SNAP) will carry out observations determining the components and equations of state of the energy density, providing insights into the cosmological model, the nature of the accelerating dark energy, and potentially clues to fundamental high energy physics theories and gravitation. This includes the ability to distinguish between various dynamical scalar field models for the dark energy, as well as higher dimension and alternate gravity theories. A new, advantageous parametrization for the study of dark energy to high redshift is also presented. C1 Lawrence Berkeley Lab, Div Phys, Berkeley, CA 94720 USA. RP Linder, EV (reprint author), Lawrence Berkeley Lab, Div Phys, Berkeley, CA 94720 USA. NR 26 TC 5 Z9 5 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 0-7354-0112-8 J9 AIP CONF PROC PY 2003 VL 655 BP 193 EP 207 PG 15 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BW31Z UT WOS:000181554200015 ER PT S AU Rubinstein, R AF Rubinstein, R BE Cotti, E Mondragon, M TavaresVelasco, G TI Two decades of Mexican particle physics at Fermilab SO PARTICLES AND FIELDS SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 10th Mexican School on Particles and Fields CY OCT 30-NOV 06, 2002 CL PLAYA DEL CARMEN, MEXICO SP Cinvestav, DPF MPS, ICN UNAM, IF UNAM, CLAF, Conacyt, IF UASLP, IFM UMSNH AB This report is a view from Fermilab of Mexican particle physics at the Laboratory since about 1980; it is not intended to be a history of Mexican particle physics: that topic is outside the expertise of the writer. The period 1980 to the present coincides with the growth of Mexican experimental particle physics from essentially no activity to its current state where Mexican groups take part in experiments at several of the world's major laboratories. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Rubinstein, R (reprint author), Fermilab Natl Accelerator Lab, Batavia, IL 60510 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 0-7354-0135-7 J9 AIP CONF PROC PY 2003 VL 670 BP 352 EP 353 PG 2 WC Physics, Particles & Fields SC Physics GA BX04B UT WOS:000184043400043 ER PT S AU Morfin, JG AF Morfin, JG BE Cotti, E Mondragon, M TavaresVelasco, G TI The Fermilab neutrino physics program SO PARTICLES AND FIELDS SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 10th Mexican School on Particles and Fields CY OCT 30-NOV 06, 2002 CL PLAYA DEL CARMEN, MEXICO SP Cinvestav, DPF MPS, ICN UNAM, IF UNAM, CLAF, Conacyt, IF UASLP, IFM UMSNH AB The NuMI Facility at Fermilab will provide an extremely intense beam of neutrinos for the MINOS neutrino oscillation experiment. The status and expected results of the MINOS experiment will be reviewed. As a next step in the study of neutrino oscillation parameters, an experiment designed to detect the sub-dominant v(mu) --> v(e) oscillation has been proposed and will be briefly described. Finally, to accurately interpret the experimental results and minimize the systematic error of neutrino oscillation experiments, as well as investigate a poorly studied aspect of neutrino physics, a high-statistics neutrino scattering experiment off various nuclei has been proposed. The physics and conceptual detector design of this experiment will be outlined. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Morfin, JG (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 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 0-7354-0135-7 J9 AIP CONF PROC PY 2003 VL 670 BP 387 EP 394 PG 8 WC Physics, Particles & Fields SC Physics GA BX04B UT WOS:000184043400048 ER PT S AU Sanchez, MCD AF Sanchez, MCD CA STAR Collaboration BE Cotti, E Mondragon, M TavaresVelasco, G TI Recent results from the STAR experiment at RHIC SO PARTICLES AND FIELDS SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 10th Mexican School on Particles and Fields CY OCT 30-NOV 06, 2002 CL PLAYA DEL CARMEN, MEXICO SP Cinvestav, DPF MPS, ICN UNAM, IF UNAM, CLAF, Conacyt, IF UASLP, IFM UMSNH ID COLLISIONS AB At high energy density, nuclear matter is predicted to undergo a phase transition to a deconfined state consisting of free quarks and gluons. The Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory is dedicate to the experimental study of high energy nuclear collisions with the goal of studying such a deconfined state, the Quark-Gluon Plasma. I will discuss recent results from the STAR experiment pertaining to which suggest novel nuclear effects in the production of high transverse momentum hadrons. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Sanchez, MCD (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 17 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 0-7354-0135-7 J9 AIP CONF PROC PY 2003 VL 670 BP 423 EP 431 PG 9 WC Physics, Particles & Fields SC Physics GA BX04B UT WOS:000184043400053 ER PT B AU Walton, CC Rader, DJ Folta, JA Sweeney, DW AF Walton, CC Rader, DJ Folta, JA Sweeney, DW BE Mittal, KL TI Particle transport and adhesion in an ultra-clean ion-beam sputter deposition process SO PARTICLES ON SURFACES 8: DETECTION, ADHESION AND REMOVAL LA English DT Proceedings Paper CT 8th International Symposium on Particles on Surfaces CY JUN 24-26, 2002 CL Providence, RI DE particles; defects; optical coatings; EUVL; lithography; bounce; transport; ion drag; ion-beam; sputtering ID CHEMICAL-VAPOR-DEPOSITION; SIZED PREPLANETARY DUST; GLOW-DISCHARGE; ENERGY-LOSS; CONTAMINATION; PLASMAS; SURFACE; DEPENDENCE; GENERATION; IMPACT AB The transport and adhesion of submicrometer particles have ,,been studied in an ion-beam sputter-coating chamber, to improve ultra-clean coating technology for Extreme Ultraviolet Lithography (EUVL). EUVL is an extension of optical lithography to lambda = 13.4 nm using reflective optics. For enhanced reflectivity, the EUVL mask and optics must be coated with an 81-layer, 280 nm total thickness Mo/Si multilayer coating. The reflectance of the multilayer is highly sensitive to particle defects, so the particle level on the mask must be reduced to a total areal density below 0.003 particles/cm(2). Current ion-beam sputter coating technology can achieve a median level of 0.04 added particles/cm(2) (i.e., 10 added particles 90 nm or larger on a 200 mm Si-wafer test substrate), but this must be reduced by about 10 times to meet mask cost requirements for EUVL. In order to understand the sources of particle defects on the masks, transport and adhesion of particles in ion-beam coating conditions have been studied, using test particles and particles native to the coating process. At process pressure near 1x10(-4) Tort, gas drag is negligible for particles larger than 10 nm, so particles travel ballistically until they hit a surface. Particle bounce appeared to contribute to transport in many experiments. Test particles introduced at a velocity V similar to 300 m/s reached remote surfaces with no line-of-sight to the particle source, consistent with multiple bounces within the chamber. The ion beam has sufficient momentum to entrain slower particles and accelerate them toward the sputter target, where some can bounce to the substrate. A model of particle entrainment by the ion beam is presented, and the relationship of beam entrainment to particle bounce is assessed. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Walton, CC (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave, Livermore, CA 94550 USA. NR 32 TC 0 Z9 0 U1 0 U2 1 PU VSP BV-C/O BRILL ACAD PUBL PI LEIDEN PA PO BOX 9000, 2300 PA LEIDEN, NETHERLANDS BN 90-6764-392-0 PY 2003 BP 63 EP 76 PG 14 WC Materials Science, Multidisciplinary; Materials Science, Characterization & Testing SC Materials Science GA BAT42 UT WOS:000223428200004 ER PT J AU Chawla, NV Moore, TE Hall, LO Bowyer, KW Kegelmeyer, WP Springer, C AF Chawla, NV Moore, TE Hall, LO Bowyer, KW Kegelmeyer, WP Springer, C TI Distributed learning with bagging-like performance SO PATTERN RECOGNITION LETTERS LA English DT Article DE distributed learning; bagging; large data sets; ensembles; multiple classifiers ID DATASETS AB Bagging forms a committee of classifiers by bootstrap aggregation of training sets from a pool of training data. A simple alternative to bagging is to partition the data into disjoint subsets. Experiments with decision tree and neural network classifiers on various datasets show that, given the same size partitions and bags, disjoint partitions result in performance equivalent to, or better than, bootstrap aggregates (bags). Many applications (e.g., protein structure prediction) involve use of datasets that are too large to handle in the memory of the typical computer. Hence, bagging with samples the size of the data is impractical. Our results indicate that, in such applications, the simple approach of creating a committee of n classifiers from disjoint partitions each of size 1/n (which will be memory resident during learning) in a distributed way results in a classifier which has a bagging-like performance gain. The use of distributed disjoint partitions in learning is significantly less complex and faster than bagging. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ S Florida, Dept Comp Sci & Engn, Tampa, FL 33620 USA. Univ Notre Dame, Dept Comp Engn & Sci, Notre Dame, IN 46556 USA. Sandia Natl Labs, Biosyst Res Dept, Livermore, CA 94551 USA. RP Univ S Florida, Dept Comp Sci & Engn, 4202 E Flower Ave, Tampa, FL 33620 USA. EM chawla@csee.usf.edu; tmoore4@csee.usf.edu; hall@csee.usf.edu; kwb@cse.nd.edu; wpk@ca.sandia.gov; csprin@ca.sandia.gov OI Bowyer, Kevin/0000-0002-7562-4390 NR 29 TC 32 Z9 35 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-8655 EI 1872-7344 J9 PATTERN RECOGN LETT JI Pattern Recognit. Lett. PD JAN PY 2003 VL 24 IS 1-3 BP 455 EP 471 AR PII S0167-8655(02)00269-6 DI 10.1016/S0167-8655(02)00269-6 PG 17 WC Computer Science, Artificial Intelligence SC Computer Science GA 630KE UT WOS:000180105400041 ER PT S AU Dziarmaga, J Smerzi, A Zurek, WH Bishop, AR AF Dziarmaga, J Smerzi, A Zurek, WH Bishop, AR BE Arodz, H Dziarmaga, J Zurek, WH TI Non-equilibrium Mott transition in a lattice of Bose-Einstein condensates SO PATTERNS OF SYMMETRY BREAKING SE NATO Science Series II-Mathematics Physics and Chemistry LA English DT Proceedings Paper CT Conference of the NATO-Advanced-Study-Institute on Patterns of Symmetry Breaking CY SEP 15-29, 2002 CL Cracow, POLAND SP NATO, Sci & Environm Affairs Div, Jagiellonian Univ, Off Acad, ESF, COSLAB Programme, Polish Acad Sci, Phys Comm, Jagiellonian Univ, Inst Phys, NATO Adv Studies Inst ID DEFECT FORMATION; COSMOLOGICAL EXPERIMENTS; VORTEX FORMATION; SYMMETRY BREAKS; SUPERFLUID; QUANTUM; QUENCH; GENERATION; INSULATOR; VORTICES AB We study the non-equilibrium dynamics of a zero temperature Mott insulator-superfluid quantum phase transition in a lattice of weakly coupled Bose-Einstein condensates. We show that crossing the critical point from the insulating to the superfluid phase at a finite rate results in a finite dispersion of current. Viceversa, crossing the critical point from the superfluid phase to the insulating one, results in a finite dispersion in the number of atoms per lattice site. We develop a microscopic dynamical model of the transition, and make quantitative predictions for realistic experiments. C1 Los Alamos Natl Lab, Div Theory, Los Alamos, NM 87545 USA. RP Dziarmaga, J (reprint author), Los Alamos Natl Lab, Div Theory, MS B210, Los Alamos, NM 87545 USA. NR 38 TC 1 Z9 1 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 1568-2609 BN 1-4020-1745-6; 1-4020-1744-8 J9 NATO SCI SER II-MATH PY 2003 VL 127 BP 313 EP 333 PG 21 WC Astronomy & Astrophysics; Physics, Condensed Matter; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BAL83 UT WOS:000222749000011 ER PT B AU von Laszewski, G Alunkal, B Gawor, J Madhuri, R Plaszczak, P Sun, XH AF von Laszewski, G Alunkal, B Gawor, J Madhuri, R Plaszczak, P Sun, XH BE Arabnia, HR Mun, Y TI A file transfer component for grids SO PDPTA'03: PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON PARALLEL AND DISTRIBUTED PROCESSING TECHNIQUES AND APPLICATIONS, VOLS 1-4 LA English DT Proceedings Paper CT International Conference on Parallel and Distributed Processing Techniques and Applications CY JUN 23-26, 2003 CL LAS VEGAS, NV SP Comp Sci Res, Educ & Applicat Press, Int Technol Inst, Korean Soc Internet Informat, World Acad Sci Informat Technol DE FTP; GridFTP; RFT; grid AB Grids have become a critical asset in large-scale scientific and engineering research. Accessing to distributed data is typically as important as access to distributed computational resources. In this paper, we present the design of Java CoG Kit components and APIs that make handling of data accessed through Grids easier for the novice Grid user and programmer. We introduce the design and architecture of a component for file transfers that separates issues related to requesting, performing and visualizing the actual file transfer. The design of our component is based on object and component based methodologies. Hence, it is assembled from a collection of reusable components promoting customization and reuse. We integrated the drag-and-drop paradigm. Protocol-independent interfaces allow easy adaptation to a variety of data sources. Hence, we not only have developed a GUI but sophisticated middleware to develop advanced Grid file transfer services. These components are distributed with the Java CoG Kit. C1 Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. RP von Laszewski, G (reprint author), Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. RI von Laszewski, Gregor/C-2808-2012 OI von Laszewski, Gregor/0000-0001-9558-179X NR 10 TC 0 Z9 0 U1 0 U2 0 PU C S R E A PRESS PI ATHENS PA 115 AVALON DR, ATHENS, GA 30606 USA BN 1-892512-45-9 PY 2003 BP 24 EP 30 PG 7 WC Computer Science, Theory & Methods SC Computer Science GA BY08G UT WOS:000187549500003 ER PT B AU Horner, JK AF Horner, JK BE Arabnia, HR Mun, Y TI A reliability limit to scaling for large globally state-sensitive, computations on homogeneous multiprocessor systems SO PDPTA'03: PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON PARALLEL AND DISTRIBUTED PROCESSING TECHNIQUES AND APPLICATIONS, VOLS 1-4 LA English DT Proceedings Paper CT International Conference on Parallel and Distributed Processing Techniques and Applications CY JUN 23-26, 2003 CL LAS VEGAS, NV SP Comp Sci Res, Educ & Applicat Press, Int Technol Inst, Korean Soc Internet Informat, World Acad Sci Informat Technol DE reliability; parallel computing; network computing; grid computing AB Globally state-sensitive computations in which the order-of-magnitude of the time-to-failure of the system hardware required by those computations is equal to or less than the order-of-magnitude of the time-to-solution must save state. Examples of such computations include large parallelized scientific computing applications running on networks of commodity-class hardware. Using elementary reliability and processing workflow theory, I derive a model of the relation among number of processing elements, "ideal" (failure-free) time-to-solution, state save/restore time, state-save frequency, and actual time-to-solution. For contemporary commercial-off-the-shelf processing elements and ideal time-to-solution greater than similar to1000 h, the model correctly predicts that actual time-to-solulion of such applications is statistically minimized at 2000-4000 processing elements. This is a statistical limit on the usable size of dedicated suites of processing elements in large globally state-sensitive applications running on contemporary off-the-shelf networks. C1 Sci Applicat Int Corp, High Performance Comp Environm, Los Alamos Natl Lab, Santa Fe, NM 87501 USA. RP Horner, JK (reprint author), Sci Applicat Int Corp, High Performance Comp Environm, Los Alamos Natl Lab, CCN-8,MS T080, Santa Fe, NM 87501 USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU C S R E A PRESS PI ATHENS PA 115 AVALON DR, ATHENS, GA 30606 USA BN 1-892512-45-9 PY 2003 BP 94 EP 99 PG 6 WC Computer Science, Theory & Methods SC Computer Science GA BY08G UT WOS:000187549500014 ER PT B AU May, J Gyllenhaal, J AF May, J Gyllenhaal, J BE Arabnia, HR Mun, Y TI Tool gear: Infrastructure for parallel tools SO PDPTA'03: PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON PARALLEL AND DISTRIBUTED PROCESSING TECHNIQUES AND APPLICATIONS, VOLS 1-4 LA English DT Proceedings Paper CT International Conference on Parallel and Distributed Processing Techniques and Applications CY JUN 23-26, 2003 CL LAS VEGAS, NV SP Comp Sci Res, Educ & Applicat Press, Int Technol Inst, Korean Soc Internet Informat, World Acad Sci Informat Technol DE parallel programming tools; performance analysis; automatic instrumentation; tool infrastructure ID PROGRAMS AB Tool Gear is a software infrastructure for developing performance analysis and other tools. Unlike existing integrated toolkits, which focus on providing a suite of capabilities, Tool Gear is designed to help toot developers create new tools quickly. It combines dynamic instrumentation capabilities with an efficient database and a sophisticated and extensible graphical user interface. This paper describes the design of Tool Gear and presents examples of tools that have been built with it. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP May, J (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave,L-561, Livermore, CA 94550 USA. NR 13 TC 2 Z9 2 U1 0 U2 0 PU C S R E A PRESS PI ATHENS PA 115 AVALON DR, ATHENS, GA 30606 USA BN 1-892512-45-9 PY 2003 BP 231 EP 237 PG 7 WC Computer Science, Theory & Methods SC Computer Science GA BY08G UT WOS:000187549500034 ER PT S AU Foster, I Iamnitchi, A AF Foster, I Iamnitchi, A BE Kaashoek, F Stoica, I TI On death, taxes, and the convergence of peer-to-peer and grid computing SO PEER-TO-PEER SYSTEMS II SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT 2nd International Workshop on Peer-to-Peer Systems CY FEB 21-22, 2003 CL BERKELEY, CALIFORNIA SP Natl Sci Fdn, Microsoft Corp C1 Univ Chicago, Dept Comp Sci, Chicago, IL 60637 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Foster, I (reprint author), Univ Chicago, Dept Comp Sci, Chicago, IL 60637 USA. RI Tavares, Antonio/A-7115-2008 NR 52 TC 64 Z9 68 U1 0 U2 2 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-40724-3 J9 LECT NOTES COMPUT SC PY 2003 VL 2735 BP 118 EP 128 PG 11 WC Computer Science, Theory & Methods SC Computer Science GA BX62M UT WOS:000185936300010 ER PT S AU Priedhorsky, WC Ransom, SM AF Priedhorsky, WC Ransom, SM BE Doty, FP Barber, HB Roehrig, H TI On-orbit radiography of space vehicles using natural radiation SO PENETRATING RADIATION SYSTEMS AND APPLICATIONS V SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Penetrating Radiation Systems and Applications V CY AUG 06-08, 2003 CL SAN DIEGO, CA SP SPIE ID CYGNUS X-1 AB We demonstrate that 80-140 keV hard X-rays from the X-ray star Cygnus X-1 could be used, in principle, to image the interior of an unknown target spacecraft. A simulated radiograph shows good signal-to-noise in a 1000-second exposure with similar to2 cm spatial resolution. Because of the high collimation and short wavelength of the radiation, an image can be formed at almost any target-detector distance. Practical application of the technique would require the detector spacecraft to assume a parallel trajectory with the target and maintain station accurately enough to hold the radiograph shadow on its sensitive surface. Further research is needed on 1) detector background minimization in high-latitude and high-altitude orbits; 2) image formation for rotating targets, which is a problem similar to computerized tomography; and 3) optimization of navigation and station-keeping. C1 Los Alamos Natl Lab, Threat Reduct Directorate, Los Alamos, NM 87545 USA. RP Priedhorsky, WC (reprint author), Los Alamos Natl Lab, Threat Reduct Directorate, Los Alamos, NM 87545 USA. OI Priedhorsky, William/0000-0003-0295-9138 NR 7 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 0-8194-5072-3 J9 P SOC PHOTO-OPT INS PY 2003 VL 5199 BP 99 EP 110 PG 12 WC Optics; Physics, Applied; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging SC Optics; Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging GA BY26S UT WOS:000188595300012 ER PT S AU Vanier, PE AF Vanier, PE BE Doty, FP Barber, HB Roehrig, H TI Improvements in coded aperture thermal neutron imaging SO PENETRATING RADIATION SYSTEMS AND APPLICATIONS V SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Penetrating Radiation Systems and Applications V CY AUG 06-08, 2003 CL SAN DIEGO, CA SP SPIE DE neutron; image; coded aperture; MURA; FFT; He-3; ionization chamber; position-sensitive ID UNIFORMLY REDUNDANT ARRAYS AB A new thermal neutron imaging system has been constructed, based on a 20-cm x 17-cm He-3 position-sensitive detector with spatial resolution better than 1 mm. New compact custom-designed position-decoding electronics are employed, as well as high-precision cadmium masks with Modified Uniformly Redundant Array patterns. Fast Fourier Transform algorithms are incorporated into the deconvolution software to provide rapid conversion of shadowgrams into real images. The system demonstrates the principles for locating sources of thermal neutrons by a stand-off technique, as well as visualizing the shapes of nearby sources. The data acquisition time could potentially be reduced two orders of magnitude by building larger detectors. C1 Brookhaven Natl Lab, NNS Dept, Upton, NY 11973 USA. RP Vanier, PE (reprint author), Brookhaven Natl Lab, NNS Dept, Bldg 197C, Upton, NY 11973 USA. NR 10 TC 4 Z9 4 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 0-8194-5072-3 J9 P SOC PHOTO-OPT INS PY 2003 VL 5199 BP 124 EP 131 PG 8 WC Optics; Physics, Applied; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging SC Optics; Physics; Imaging Science & Photographic Technology; Radiology, Nuclear Medicine & Medical Imaging GA BY26S UT WOS:000188595300014 ER PT J AU Ramakrishnan, H Khataniar, S Dandekar, AY Patil, SL Chukwu, GA Kamath, VA Haslebacher, WF Hackworth, JH AF Ramakrishnan, H Khataniar, S Dandekar, AY Patil, SL Chukwu, GA Kamath, VA Haslebacher, WF Hackworth, JH TI Characterization of gas-to-liquid (GTL) and Alaska North Slope Crude (ANSC) oil blend properties for flow through the Trans Alaska Pipeline System (TAPS) by density and viscosity measurements SO PETROLEUM SCIENCE AND TECHNOLOGY LA English DT Article DE GTL; viscosity; TAPS; ANS ID TEMPERATURE AB As part of a major project on studying the transportation of gas-to-liquids (GTL) through the existing Trans Alaska Pipeline System (TAPS), the density and viscosity of GTL and the Alaskan North Slope Crude (ANSC) and their blends were measured. All density and viscosity measurements were performed, using the Anton-Paar vibrating tube densitometer and a cone and plate viscometer respectively, at temperatures ranging from 20degreesC to 60degreesC at Atmospheric pressure. The accuracy of the measured data has been ascertained. In addition to the density and viscosity data, other data reported for GTL and ANSC include compositions. Finally, generalized density and viscosity correlations for the measured data are presented. C1 Univ Alaska Fairbanks, Dept Petr Engn, Fairbanks, AK 99701 USA. US DOE, Morgantown, WV USA. RP Dandekar, AY (reprint author), Univ Alaska Fairbanks, Dept Petr Engn, POB 755880, Fairbanks, AK 99701 USA. NR 9 TC 6 Z9 6 U1 0 U2 3 PU MARCEL DEKKER INC PI NEW YORK PA 270 MADISON AVE, NEW YORK, NY 10016 USA SN 1091-6466 J9 PETROL SCI TECHNOL JI Pet. Sci. Technol. PY 2003 VL 21 IS 1-2 BP 301 EP 314 DI 10.1081/LFT-120016950 PG 14 WC Energy & Fuels; Engineering, Chemical; Engineering, Petroleum SC Energy & Fuels; Engineering GA 650NV UT WOS:000181271000020 ER PT J AU Sharma, SS Moore, KT Howe, JM AF Sharma, SS Moore, KT Howe, JM TI Transmission electron microscopy investigation of an ordered metastable phase in Zr-N alloys SO PHILOSOPHICAL MAGAZINE LA English DT Article ID GROWTH-KINETICS; TRANSFORMATIONS; BOUNDARIES; INTERFACES; CRYSTAL; MODEL AB Supersaturated hcp alpha-Zr(N) alloys containing 22-28 at.% N were prepared by nitriding sheets of Zr in an atmosphere of high-purity N-2, followed by homogenization under high-purity Ar gas. Quenching and isothermal ageing of the alloys for various times between 500 and 650degreesC resulted in precipitation of a metastable phase, rather than the equilibrium phase ZrN. This investigation focused on determining the structure, orientation relationship, habit plane, morphology, growth kinetics and atomic growth mechanism of this non-equilibrium precipitate using transmission electron microscopy imaging and diffraction techniques, high-resolution transmission electron microscopy, electron-energy-loss spectroscopy and various simulation programs. The precipitate, which was arbitrarily designated the xi phase, has a monoclinic Bravais lattice. Its lattice parameters are a = 0.32 nm, b = 0.60 nm, c = 0.56 nm, alpha = beta = 90degrees and gamma = 121.5degrees. Its orientation relationship with the alpha matrix is (0001)(alpha)//(020)(xi) and [01 (1) over bar0](alpha)//[001](xi) and the average habit plane of lenticularly shaped precipitates is (01 (1) over bar2)(alpha). Determination of the structure and other aspects of the phase transformation are discussed. C1 Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA. Lawrence Livermore Natl Lab, Chem & Mat Directorate, Livermore, CA 94550 USA. RP Howe, JM (reprint author), Univ Virginia, Dept Mat Sci & Engn, Charlottesville, VA 22904 USA. EM jh9s@virginia.edu NR 24 TC 4 Z9 4 U1 2 U2 6 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1478-6443 J9 PHILOS MAG JI Philos. Mag. PD JAN 1 PY 2003 VL 83 IS 1 BP 31 EP 51 DI 10.1080/0141861021000020103 PG 21 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 660AK UT WOS:000181811600003 ER PT J AU Liao, XZ Huang, JY Zhu, YT Zhou, F Lavernia, EJ AF Liao, XZ Huang, JY Zhu, YT Zhou, F Lavernia, EJ TI Nanostructures and deformation mechanisms in a cryogenically ball-milled Al-Mg alloy SO PHILOSOPHICAL MAGAZINE LA English DT Article ID CHANNEL ANGULAR EXTRUSION; SINGLE-CRYSTALS; MICROSTRUCTURES; ALUMINUM; POWDERS; STRESS; STRAIN; COPPER AB An Al-7.6 at.% Mg alloy was ball milled in liquid N(2) for 8 h and its microstructures were investigated using transmission electron microscopy. Electron diffraction confirmed that the resulting powder is a supersaturated Al-Mg solid solution with an fcc structure. Three typical nanostructures with different grain-size ranges and shapes were observed and the deformation mechanisms in these structures were found to be different. High densities of dislocations were found in large crystallites, implying that dislocation slip is the dominant deformation mechanism. The dislocations rearranged to form small-angle subboundaries upon further deformation, resulting in the formation of medium-sized crystallites with diameters of 10 - 30 nm. In very small crystallites with dimensions less than 10 nm, twinning becomes an important deformation mechanism. The reasons for the different deformation mechanisms were discussed. Some defects, such as twin boundaries, and small- and large-angle grain boundaries were investigated in detail. C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA. RP Liao, XZ (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. EM xzliao@lanl.gov RI Zhu, Yuntian/B-3021-2008; Liao, Xiaozhou/B-3168-2009; Huang, Jianyu/C-5183-2008 OI Zhu, Yuntian/0000-0002-5961-7422; Liao, Xiaozhou/0000-0001-8565-1758; NR 30 TC 115 Z9 117 U1 4 U2 25 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1478-6435 J9 PHILOS MAG JI Philos. Mag. PY 2003 VL 83 IS 26 BP 3065 EP 3075 DI 10.1080/1478643031000152799 PG 11 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 716DB UT WOS:000185012600007 ER PT J AU Moldovan, D Wolf, D Phillpot, SR Mukherjee, AK Gleiter, H AF Moldovan, D Wolf, D Phillpot, SR Mukherjee, AK Gleiter, H TI Grain-boundary diffusion-controlled stress concentration in polycrystals SO PHILOSOPHICAL MAGAZINE LETTERS LA English DT Article ID VOID GROWTH; CREEP; CAVITATION AB Mesoscopic simulations are used to elucidate the fundamental effects of microstructural inhomogeneity in polycrystalline materials on grain-boundary diffusion creep (Coble creep). Considering two-dimensional model microstructures with a distribution in the grain sizes and grain-boundary diffusivities, we determine the stress distribution along the grain boundaries during diffusion creep. Our simulations reveal that two distinct types of microstructural inhomogeneity have similar effects on the diffusion creep. The purely topological inhomogeneities, arising from the presence of the distributions in the grain sizes and grain shapes, cause the larger grains to experience much higher stresses than the smaller grains do. Moreover, even in a topologically uniform microstructure, a distribution in the grain-boundary diffusivities can lead to even higher stress concentrations than those caused by the topological inhomogeneities alone. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Forschungszentrum Karlsruhe, Inst Nanotechnol, D-76021 Karlsruhe, Germany. Univ Calif Davis, Dept Chem Engn & Mat Sci, Davis, CA 95616 USA. RP Moldovan, D (reprint author), Louisiana State Univ, Dept Mech Engn, Baton Rouge, LA 70803 USA. RI Phillpot, Simon/J-9117-2012; OI Phillpot, Simon/0000-0002-7774-6535 NR 22 TC 10 Z9 10 U1 0 U2 8 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0950-0839 J9 PHIL MAG LETT JI Philos. Mag. Lett. PD JAN PY 2003 VL 83 IS 1 BP 29 EP 38 DI 10.1080/0950083021000045742 PG 10 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 636QP UT WOS:000180467900004 ER PT J AU Allen, CW Birtcher, RC Donnelly, SE Song, M Mitsuishi, K Furura, K Dahmen, U AF Allen, CW Birtcher, RC Donnelly, SE Song, M Mitsuishi, K Furura, K Dahmen, U TI Determination of interfacial tensions for Xe nanoprecipitates in Al at 300 K SO PHILOSOPHICAL MAGAZINE LETTERS LA English DT Article ID MEV ELECTRON-IRRADIATION; COALESCENCE; BEHAVIOR; ALUMINUM AB An expression for the Laplace pressure associated with a cuboctahedral (tetrakaidodecahedral) void having {111} and {200} facets is derived, which includes anisotropy of void facet energies. The result is compared with experiment at 300 K for the equilibrium size of the largest Xe nanocrystal, constrained within such voids in Al. From the largest Xe nanocrystal, the Al-Xe interfacial tensions are deduced by setting the corresponding calculated Laplace pressure equal to the equilibrium pressure for melting of Xe at 300 K, obtained from empirical bulk compression data. These interfacial tension values are 1.05 J m(-2) for {111} facets and 1.10 J m(-2) for {200} facets, deduced from the size of two large Xe nanoprecipitates. These values are believed to approximate closely the corresponding surface tensions for Al at 300 K. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Univ Salford, Joule Phys Lab, Salford M5 4WT, Lancs, England. Natl Inst Mat Sci, Nanomat Lab, Tsukuba, Ibaraki 305003, Japan. Univ Calif Berkeley, Lawrence Berkeley Lab, Natl Ctr Electron Microscopy, Berkeley, CA 94720 USA. RP Allen, CW (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. OI Donnelly, Stephen/0000-0002-9749-5550 NR 17 TC 11 Z9 11 U1 1 U2 1 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0950-0839 J9 PHIL MAG LETT JI Philos. Mag. Lett. PD JAN PY 2003 VL 83 IS 1 BP 57 EP 64 DI 10.1080/0950083021000045733 PG 8 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 636QP UT WOS:000180467900007 ER PT J AU Majzoub, EH Hennig, RG Kelton, KF AF Majzoub, EH Hennig, RG Kelton, KF TI Rietveld refinement and ab initio calculations of a C14-like Laves phase in Ti-Zr-Ni SO PHILOSOPHICAL MAGAZINE LETTERS LA English DT Article ID ALLOYS; METALS; CRYSTAL AB Ternary Ti-Zr-Ni alloys form icosahedral and other complex phases near the composition Ti41.5Zr41.5Ni17. Among these is a C14-like Laves phase, lambda-(Ti-Zr-Ni), which forms at a composition Ti37Zr33Ni30. The crystal structure of this phase is determined by a Rietveld analysis. Ab initio calculations are used to confirm the structural details and to investigate the energetic stability of the structure. We show. that lambda-(Ti-Zr-Ni) is a high-temperature phase, with a MgZn2-type structure with Zr occupying primarily the Mg sites and Ti and Ni randomly occupying the Zn sites. C1 Washington Univ, Dept Phys, St Louis, MO 63130 USA. RP Majzoub, EH (reprint author), Sandia Natl Labs, 7011 East Ave, Livermore, CA 94550 USA. RI Hennig, Richard/A-2978-2008 OI Hennig, Richard/0000-0003-4933-7686 NR 16 TC 6 Z9 6 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0950-0839 J9 PHIL MAG LETT JI Philos. Mag. Lett. PD JAN PY 2003 VL 83 IS 1 BP 65 EP 71 DI 10.1080/0950083021000045779 PG 7 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 636QP UT WOS:000180467900008 ER PT J AU Medlin, DL Cohen, D Pond, RC AF Medlin, DL Cohen, D Pond, RC TI Accommodation of coherency strain by interfacial disconnections at a 90 degrees < 110 > grain boundary in gold SO PHILOSOPHICAL MAGAZINE LETTERS LA English DT Article ID DISLOCATIONS; STEPS AB The structure of interfacial disconnections (i.e. line defects possessing both step and dislocation character) at a 90degrees [110] tilt boundary in gold has been investigated. High-resolution transmission electron microscopy observations identify these defects separating short (40-60 Angstrom) {111}-{112} terraces along the boundary. Because the ratio of the periodic length in the [111] direction to that in the [112] direction is irrational (2 1/2), the crystallography of this boundary is incommensurate. By measuring the dislocation content of the disconnections, it is shown how the defects accommodate the 5.7% 'misfit' in the directions parallel to the interface and thereby enable coherency to be achieved across the {111}-{112} terraces. This structural relaxation is markedly different from that at {100}-{110} grain boundary facets in this same system, for which previous observations have found an incoherent structure with no strain localization. C1 Sandia Natl Labs, Thin Film & Interface Sci Dept, Livermore, CA 94551 USA. Univ Liverpool, Dept Mat Engn, Liverpool L69 3BX, Merseyside, England. RP Medlin, DL (reprint author), Sandia Natl Labs, Thin Film & Interface Sci Dept, Livermore, CA 94551 USA. NR 11 TC 11 Z9 11 U1 0 U2 6 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0950-0839 J9 PHIL MAG LETT JI Philos. Mag. Lett. PY 2003 VL 83 IS 4 BP 223 EP 232 DI 10.1080/0950083031000091461 PG 10 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 660NA UT WOS:000181838200002 ER PT J AU Mandal, P Hashimoto, T Suzuki, K Hosono, K Kamimura, Y Edagawa, K AF Mandal, P Hashimoto, T Suzuki, K Hosono, K Kamimura, Y Edagawa, K TI Formation of decagonal and approximant phases in the Al-Ni-Ru system SO PHILOSOPHICAL MAGAZINE LETTERS LA English DT Article ID QUASI-CRYSTAL; CO-NI; ELECTRON-MICROSCOPY; QUASICRYSTALS; AL65CU20CO15; ORDER; PATTERNS; ALLOYS; AXIS AB Al-Ni-Ru alloys with a wide composition range have been synthesized and examined by X-ray and electron diffraction experiments. In this system, two types of decagonal (d) phases are formed, namely basic-type and superlattice-type d phases. Annealing experiments have shown that the basic-type d phase is stable at high temperatures and that its single-phase region is located in a small composition range around Al75Ni15Ru10. On the other hand, the superlattice-type d phase is metastable and has been found to form only in the samples before annealing. Besides the d phases, a high-order crystal approximant phase with lattice parameters a = 99.5 Angstrom and b = 84.6 Angstrom has been found. The structural relation between the approximant phase and the d phase is discussed in terms of a phason tensor. C1 Univ Tokyo, Inst Ind Sci, Meguro Ku, Tokyo 1538505, Japan. Ames Lab, Ames, IA 50011 USA. RP Mandal, P (reprint author), Univ Tokyo, Inst Ind Sci, Meguro Ku, 4-6-1 Komaba, Tokyo 1538505, Japan. NR 24 TC 2 Z9 2 U1 0 U2 1 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 0950-0839 J9 PHIL MAG LETT JI Philos. Mag. Lett. PY 2003 VL 83 IS 5 BP 315 EP 323 DI 10.1080/0950083031000103872 PG 9 WC Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering; Physics, Applied; Physics, Condensed Matter SC Materials Science; Metallurgy & Metallurgical Engineering; Physics GA 677FY UT WOS:000182797300004 ER PT J AU Zepp, RG Callaghan, TV Erickson, DJ AF Zepp, RG Callaghan, TV Erickson, DJ TI Interactive effects of ozone depletion and climate change on biogeochemical cycles SO PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES LA English DT Review ID DISSOLVED ORGANIC-MATTER; UV-B RADIATION; SOLAR ULTRAVIOLET-RADIATION; FRESH-WATER ECOSYSTEMS; SOUTHEASTERN UNITED-STATES; MIDDLE ATLANTIC BIGHT; ROBUR LEAF-LITTER; TIERRA-DEL-FUEGO; PHOTOCHEMICAL PRODUCTION; QUERCUS-ROBUR AB The effects of ozone depletion on global biogeochemical cycles, via increased UV-B radiation at the Earth's surface, have continued to be documented over the past 4 years. In this report we also document various effects of UV-B that interact with global climate change because the detailed interactions between ozone depletion and climate change are central to the prediction and evaluation of future Earth environmental conditions. There is increasing evidence that elevated UV-B has significant effects on the terrestrial biosphere with important implications for the cycling of carbon, nitrogen and other elements. Increased UV has been shown to induce carbon monoxide production from dead plant matter in terrestrial ecosystems, nitrogen oxide production from Arctic and Antarctic snowpacks, and halogenated substances from several terrestrial ecosystems. New studies on UV effects on the decomposition of dead leaf material confirm that these effects are complex and species-specific. Decomposition can be retarded, accelerated or remain unchanged. It has been difficult to relate effects of UV on decomposition rates to leaf litter chemistry, as this is very variable. However, new evidence shows UV effects on some fungi, bacterial communities and soil fauna that could play roles in decomposition and nutrient cycling. An important new result is that not only is nitrogen cycling in soils perturbed significantly by increased UV-B, but that these effects persist for over a decade. As nitrogen cycling is temperature dependent, this finding clearly links the impacts of ozone depletion to the ability of plants to use nitrogen in a warming global environment. There are many other potential interactions between UV and climate change impacts on terrestrial biogeochemical cycles that remain to be quantified. There is also new evidence that UV-B strongly influences aquatic carbon, nitrogen, sulfur, and metals cycling that affect a wide range of life processes. UV-B accelerates the decomposition of colored dissolved organic matter (CDOM) entering the sea via terrestrial runoff, thus having important effects on oceanic carbon cycle dynamics. Since UV-B influences the distribution of CDOM, there is an impact of UV-B on estimates of oceanic productivity based on remote sensing of ocean color. Thus, oceanic productivity estimates based on remote sensing require estimates of CDOM distributions. Recent research shows that UV-B transforms dissolved organic matter to dissolved inorganic carbon and nitrogen, including carbon dioxide and ammonium and to organic substances that are either more or less readily available to micro-organisms. The extent of these transformations is correlated with loss of UV absorbance by the organic matter. Changes in aquatic primary productivity and decomposition due to climate-related changes in circulation and nutrient supply, which occur concurrently with increased UV-B exposure, have synergistic influences on the penetration of light into aquatic ecosystems. New research has confirmed that UV affects the biological availability of iron, copper and other trace metals in aquatic environments thus potentially affecting the growth of phytoplankton and other microorganisms that are involved in carbon and nitrogen cycling. There are several instances where UV-B modifies the air-sea exchange of trace gases that in turn alter atmospheric chemistry, including the carbon cycle. C1 US EPA, Athens, GA 30605 USA. Abisko Sci Res Stn, S-98107 Abisko, Sweden. Univ Sheffield, Sheffield Ctr Arctic Ecol, Dept Anim & Plant Sci, Tapton Expt Gardens, Sheffield S10 5BR, S Yorkshire, England. Oak Ridge Natl Lab, Div Math & Comp Sci, Computat Climate Dynam Grp, Oak Ridge, TN 37831 USA. RP Zepp, RG (reprint author), US EPA, 960 Coll Stn Rd, Athens, GA 30605 USA. RI Callaghan, Terens/N-7640-2014 NR 158 TC 45 Z9 53 U1 3 U2 45 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1474-905X J9 PHOTOCH PHOTOBIO SCI JI Photochem. Photobiol. Sci. PD JAN PY 2003 VL 2 IS 1 BP 51 EP 61 DI 10.1039/b211154n PG 11 WC Biochemistry & Molecular Biology; Biophysics; Chemistry, Physical SC Biochemistry & Molecular Biology; Biophysics; Chemistry GA 642HH UT WOS:000180797800008 PM 12659539 ER PT S AU Griffith, ML Ensz, MT Reckaway, DE AF Griffith, ML Ensz, MT Reckaway, DE BE Pique, A Sugioka, K Herman, PR Fieret, J Bachmann, FG Dubowski, JJ Hoving, W Washio, K Geohegan, DB Trager, F Murakami, K TI Femtosecond laser machining of steel SO PHOTON PROCESSING IN MICROELECTRONICS AND PHOTONICS II SE Proceedings of SPIE LA English DT Proceedings Paper CT Conference on Photon Processing in Microelectronics and Photonics II CY JAN 27-30, 2003 CL SAN JOSE, CA SP SPIE DE femtosecond; laser; micro fabrication; micro machining; steel; rapid prototyping; layered manufacturing AB Femtosecond laser processing is a promising new technology for the fabrication of micro-scale components from engineering materials, such as metals. In the femtosecond time regime, the ablation process is nearly a solid to vapor transition, thereby providing access to cut smaller features. Sandia National Laboratories has constructed a femtosecond laser microfabrication system to study the ability to produce microscale components in metals and glasses. In this paper, we will report on our initial studies to understand the metal ablation process with respect to manufacturing process parameters. With this understanding, we will show that femtosecond laser processing can fabricate complex components with fine feature detail and clean surfaces. A key finding in this work is the substantial effect of layer decrement on resulting recast material deposition when processing in air. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Griffith, ML (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM mlgriff@sandia.gov NR 11 TC 4 Z9 4 U1 3 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 0-8194-4777-3 J9 PROC SPIE PY 2003 VL 4977 BP 118 EP 122 DI 10.1117/12.479229 PG 5 WC Engineering, Manufacturing; Optics; Physics, Applied SC Engineering; Optics; Physics GA BX33C UT WOS:000184964100014 ER PT S AU Geohegan, DB Schittenhelm, CH Puretzky, AA Lance, MJ Jellison, GE Britt, PF AF Geohegan, DB Schittenhelm, CH Puretzky, AA Lance, MJ Jellison, GE Britt, PF BE Pique, A Sugioka, K Herman, PR Fieret, J Bachmann, FG Dubowski, JJ Hoving, W Washio, K Geohegan, DB Trager, F Murakami, K TI Synthesis of multifunctional single wall carbon nanotube amorphous diamond thin film composites SO PHOTON PROCESSING IN MICROELECTRONICS AND PHOTONICS II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Photon Processing in Microelectronics and Photonics II CY JAN 27-30, 2003 CL SAN JOSE, CA SP SPIE DE carbon nanotubes; laser plasmas; spectroscopy; in situ diagnostics; nanoparticles; hydrodynamics ID OPTICAL-PROPERTIES; ARF-LASER; DEPOSITION AB The first thin-film single-wall carbon nanotube (SWNT) composites synthesized by pulsed laser deposition (PLD) are reported. Ultrahard, transparent, pure-carbon, electrically-insulating, amorphous diamond thin films were deposited by PLD as scratch-resistant, encapsulating matrices for disperse, electrically conductive mats of SWNT bundles. In situ resistance measurements of the mats during PLD, as well as ex situ: Raman spectroscopy, IN measurements, spectroscopic ellipsometry, and field emission scanning electron microscopy, are used to understand the interaction between the SWNT and the highly energetic (similar to 100 eV) carbon species responsible for the formation of the amorphous diamond thin film. The results indicate that a large fraction of SWNT within the bundles survive the energetic bombardment from the PLD plume, preserving the metallic behavior of the interconnected nanotube mat, although with higher resistance. Amorphous diamond film thicknesses of only 50 nm protect the SWNT against wear, providing scratch hardness up to 25 GPa in an optically transmissive, all-carbon thin film composite. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Geohegan, DB (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RI Puretzky, Alexander/B-5567-2016; Lance, Michael/I-8417-2016; Geohegan, David/D-3599-2013 OI Puretzky, Alexander/0000-0002-9996-4429; Lance, Michael/0000-0001-5167-5452; Geohegan, David/0000-0003-0273-3139 NR 20 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 0-8194-4777-3 J9 P SOC PHOTO-OPT INS PY 2003 VL 4977 BP 658 EP 669 DI 10.1117/12.483866 PG 12 WC Engineering, Manufacturing; Optics; Physics, Applied SC Engineering; Optics; Physics GA BX33C UT WOS:000184964100072 ER PT S AU Lin, SY Fleming, JG AF Lin, SY Fleming, JG BE Adibi, A Scherer, A Lin, SY TI Efficient light emission by a three-dimensional, all-metallic photonic crystal and its energy consequences SO PHOTONIC CRYSTAL MATERIALS AND DEVICES SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Photonic Crystal Materials and Devices CY JAN 28-30, 2003 CL SAN JOSE, CA SP SPIE DE photonic crystal; photonic band gap; metallic structure; thermal emission ID BAND-GAP AB A review is given on the recent progress in three-dimensional (3D) all-metallic photonic-crystals in the near- and mid-infrared wavelengths. Results of optical spectroscopy of the sample will be described. Unique light emission characteristics at a narrow band from the photonic-crystal will also be presented. This new class of 3D all-metallic photonic-crystal is promising for thermal photo-voltaic power generation and for lighting application. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Lin, SY (reprint author), Sandia Natl Labs, MS 0603,POB 5800, Albuquerque, NM 87185 USA. NR 16 TC 5 Z9 5 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 0-8194-4800-1 J9 P SOC PHOTO-OPT INS PY 2003 VL 5000 BP 1 EP 7 DI 10.1117/12.480060 PG 7 WC Crystallography; Optics SC Crystallography; Optics GA BX18M UT WOS:000184544200001 ER PT S AU Demos, SG Ramsamooj, R AF Demos, SG Ramsamooj, R BE Iftekharuddin, KM Awwal, AAS TI Hyperspectral imaging of cells; Towards real-time pathological assessment SO PHOTONIC DEVICES AND ALGORITHMS FOR COMPUTING V SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Photonic Devices and Algorithms for Computing V CY AUG 06-07, 2003 CL SAN DIEGO, CA SP SPIE DE microscopy; tissue optical properties; cell imaging; miniaturization ID LIGHT-SCATTERING SPECTROSCOPY; SCANNING MICROSCOPE; FLUORESCENCE AB The goal of this work is to develop micro-scale noninvasive photonic instrumentation and techniques that will enable real-time imaging and monitoring of microstructures and cells in tissues. We utilize a hyperspectral microscope to explore the differences of native fluorescence and polarized light scattering from cellular components using various excitation wavelengths. The key optical "signature" characteristics that differentiate the various cellular components are used to obtain composite images that highlight their presence and the relative concentration of various tissue chromophores. The sensitivity has been optimized in our specially designed instrumentation so that image acquisition times are very short for real-time application in a clinical setting. This technology is not invasive to the cells and therefore it can be used to monitor their function while they are still alive. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Demos, SG (reprint author), Lawrence Livermore Natl Lab, POB 808,L-411, Livermore, CA 94551 USA. NR 16 TC 1 Z9 1 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 0-8194-5074-X J9 P SOC PHOTO-OPT INS PY 2003 VL 5201 BP 133 EP 137 DI 10.1117/12.508097 PG 5 WC Computer Science, Hardware & Architecture; Optics; Physics, Applied SC Computer Science; Optics; Physics GA BY24W UT WOS:000188420500015 ER PT S AU Bakke, T Sullivan, CT AF Bakke, T Sullivan, CT BE Heyler, RA Robbins, DJ Jabbour, GE TI Integration of polymeric optical waveguides with SOI MEMS structures SO PHOTONICS PACKAGING AND INTEGRATION III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Photonics Packaging and Integration III CY JAN 28-30, 2003 CL SAN JOSE, CA SP SPIE DE optical switch; silicon on insulator; polymeric optical waveguides ID SPOT-SIZE TRANSFORMER; SWITCH AB Optical switches based on deflection of a waveguide element offer low crosstalk, low polarization dependency, low power consumption, and high degree of integration. Such switches made by post processing of polymeric waveguides onto MEMS structures of silicon-on-insulator (SOI) efficiently combine low loss waveguides with the exceptional mechanical properties of single crystalline silicon. An important aspect of this concept is that it allows independent optimization of the mechanical and optical structures by efficiently separating the two. Well established, high yield methods exist for structuring silicon based on deep reactive ion etching (DRIE), which allows the formation of mechanical structures with high aspect ratio. The mechanical structure can then be planarized for further processing by utilizing spin coating properties of certain polymers. This allows post processing of high-resolution passive polymeric waveguide networks that can fulfil a variety of functions depending on the application, including spot-size transformers for low loss coupling to optical fibers. These waveguides can also potentially be integrated with CMOS or. active optoelectronic elements into forming highly functional hybrid photonic integrated circuits, partly facilitated by the low temperatures required for processing of polymers. This paper highlights key process technologies and specifically discusses issues related to an optical switch that was developed for proof of concept. This switch was made of 5mum thick SOI with 3mum wide, high optical confinement polymeric waveguides. Switching times were down to 30mus, switching voltages 20 to 50V, and crosstalk was -32dB. The paper further outlines possible applications of the switch to state-of-the-art problems in photonics. C1 Sandia Natl Labs, RF Microsyst Technol, Albuquerque, NM 87185 USA. RP Bakke, T (reprint author), Sandia Natl Labs, RF Microsyst Technol, POB 5800, Albuquerque, NM 87185 USA. NR 18 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 0-8194-4797-8 J9 P SOC PHOTO-OPT INS PY 2003 VL 4997 BP 109 EP 122 DI 10.1117/12.479462 PG 14 WC Optics SC Optics GA BX02F UT WOS:000183989900013 ER PT J AU Seibert, M Wasielewski, MR AF Seibert, M Wasielewski, MR TI The isolated Photosystem II reaction center: first attempts to directly measure the kinetics of primary charge separation SO PHOTOSYNTHESIS RESEARCH LA English DT Review DE charge separation; femtosecond spectroscopy; Govindjee; Scott Greenfield; Photosystem II; reaction center; Michael Seibert; Michael Wasielewski ID TRANSIENT ABSORPTION-SPECTROSCOPY; PHOTOSYNTHETIC REACTION CENTER; REACTION CENTER COMPLEX; ENERGY-TRANSFER; RHODOPSEUDOMONAS-VIRIDIS; PRIMARY PHOTOCHEMISTRY; THYLAKOID MEMBRANE; EXCITATION-ENERGY; PROTEIN; RESOLUTION AB Direct measurements of the intrinsic rate of primary charge separation in the isolated Photosystem II ( PS II) reaction center complex had to await the availability of suitable, stabilized reaction center materials as well as sophisticated femtosecond transient absorption spectroscopic techniques. The events that led to the first direct measurements of the primary charge separation act in PS II and discussions of the results thereafter are chronicled in this brief historical review. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. Northwestern Univ, Dept Chem, Evanston, IL 60208 USA. RP Seibert, M (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. NR 31 TC 15 Z9 15 U1 0 U2 2 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0166-8595 J9 PHOTOSYNTH RES JI Photosynth. Res. PY 2003 VL 76 IS 1-3 BP 263 EP 268 DI 10.1023/A:1024986307839 PG 6 WC Plant Sciences SC Plant Sciences GA 705XJ UT WOS:000184422000025 ER PT J AU Kreiskott, S Getta, M Monter, B Piel, H Pupeter, N AF Kreiskott, S Getta, M Monter, B Piel, H Pupeter, N TI High J(C) YBCO films on biaxially textured Ni with oxide buffer layers deposited using evaporation and sputtering techniques SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS LA English DT Article DE RABiTS; coated conductors; YBaCuO-films; buffer layers ID CRITICAL-CURRENT DENSITIES; ELECTRON-BEAM EVAPORATION; EPITAXIAL YBA2CU3O7; CONDUCTORS; GROWTH; TAPES; CEO2 AB Epitaxial buffer layers of CeO2 and yttria-stabilised ZrO2 (YSZ) have been deposited on biaxially textured nickel substrates using evaporation and rf sputtering. The buffer layers were characterised by XRD, SEM and optical microscopy. YBa2CU3O7-6 (YBCO) films were deposited by high pressure dc sputtering on CeO2/YSZ/CeO2 buffered substrates and the resulting superconducting properties were measured inductively. On exclusively evaporated buffers critical current densities of up to 0.6 MA/cm(2) (77.3 K, H = 0 T) were achieved. The buffer layers showed some cracks after YBCO deposition, which we considered to be responsible for the relatively low J(c). In contrast buffer architectures with evaporated CeO2 followed by rf sputtering of YSZ and CeO2 remained completely free of cracks after YBCO deposition. Critical current densities between 1.5 and 2.6 MA/cm(2) (77 K, H = 0 T) in 400 nm thick YBCO films were obtained reproducibly. The critical temperatures T-c ranged between 87 and 92 K and the typical width DeltaT(c) of the transition was 1.5 K. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Berg Univ Gesamthsch Wuppertal, Dept Phys, D-42097 Wuppertal, Germany. Cryoelectra GmbH, D-42287 Wuppertal, Germany. RP Kreiskott, S (reprint author), Los Alamos Natl Lab, Superconduct Technol Ctr, Mailstop T004, Los Alamos, NM 87545 USA. NR 21 TC 17 Z9 18 U1 1 U2 13 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD JAN 1 PY 2003 VL 383 IS 4 BP 306 EP 314 AR PII S0921-4534(02)01986-X DI 10.1016/S0921-4534(02)01986-X PG 9 WC Physics, Applied SC Physics GA 633WH UT WOS:000180307200004 ER PT J AU Lorenz, B Meng, RL Xue, YY Chu, CW AF Lorenz, B Meng, RL Xue, YY Chu, CW TI Pressure effect on the superconducting and magnetic transitions of the superconducting ferromagnet RuSr2GdCu2O8 SO PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS LA English DT Article DE RuSr2GdCu2O8; intra-grain superconductivity; pressure effect ID PHYSICAL-PROPERTIES; GD; EU; COEXISTENCE AB The superconducting ferromagnet RuSr2GdCu2O8 was investigated at high pressure. The intra-grain superconducting transition temperatures T-c, is resolved in ac-susceptibility as well as resistivity measurements. It is shown that the pressure shift of T-c is much smaller than that of other high-T-c compounds in a similar doping state. In contrast, the ferromagnetic transition temperature, T-c increases with pressure at a relative rate that is about twice as large as that of T-c. The high-pressure data indicate a possible competition of the ferromagnetic and superconducting states in RuSr2GdCu2O8. (C) 2002 Elsevier Science B.V. All rights reserved. C1 Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA. Univ Houston, Dept Phys, Houston, TX 77204 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Hong Kong Univ Sci & Technol, Hong Kong, Hong Kong, Peoples R China. RP Lorenz, B (reprint author), Univ Houston, Texas Ctr Superconduct, Houston, TX 77204 USA. EM blorenz@uh.edu NR 26 TC 16 Z9 16 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4534 J9 PHYSICA C JI Physica C PD JAN 1 PY 2003 VL 383 IS 4 BP 337 EP 342 AR PII S0921-4534(02)01983-4 DI 10.1016/S0921-4534(02)01983-4 PG 6 WC Physics, Applied SC Physics GA 633WH UT WOS:000180307200007 ER PT J AU Skinner, CH Bekris, N Coad, JP Gentile, CA Hassanein, A Reiswig, R Willms, S AF Skinner, CH Bekris, N Coad, JP Gentile, CA Hassanein, A Reiswig, R Willms, S TI Thermal response of tritiated codeposits from JET and TFTR to transient heat pulses SO PHYSICA SCRIPTA LA English DT Article; Proceedings Paper CT International Workshop on Hydrogen Isotopes in Fusion Reactor Materials CY MAY 22-24, 2002 CL TOKYO, JAPAN SP Atom Energy Soc Japan ID PLASMA INSTABILITIES; TRITIUM REMOVAL; EROSION; TOKAMAKS; TILES; LASER; WALL; ITER AB High heat flux interactions with plasma facing components have been studied at microscopic scales. The beam from a continuous wave neodymium laser was scanned at high speed over the surface of graphite and carbon fiber composite tiles that had been retrieved from TFTR and JET after DT plasma operations. The tiles have a surface layer of amorphous hydrogenated carbon that was codeposited during plasma operations and laser scanning has released more than 80% of the codeposited tritium. The temperature rise of the codeposit was much higher than that of the manufactured material and showed an extended time history. The peak temperature varied dramatically (e.g. 1436degreesC compared to > 2300degreesC) indicating strong variations in the thermal conductivity to the substrate. A digital microscope imaged the codeposit before. during and after the interaction with the laser and revealed 100-micron scale hot spots during the interaction. The heat flux produced a pattern of beads on a mixed Be/C deposit. Heat pulse durations of order 100ms resulted in brittle destruction and material loss from the surface. whilst a duration of approximate to10ms showed minimal changes to the codeposit. These results show that reliable predictions for the response of deposition areas to off-normal events such as ELMs and disruptions in next step devices need to be based on experiments with tokamak generated codeposits. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Forschungszentrum Karlsruhe, Tritium Lab, D-76021 Karlsruhe, Germany. UKAEA Euratom Fus Assoc, Culham Res Ctr, Abingdon, Oxon, England. Argonne Natl Lab, Argonne, IL 60439 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Skinner, CH (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 20 TC 31 Z9 31 U1 0 U2 1 PU ROYAL SWEDISH ACAD SCIENCES PI STOCKHOLM PA PUBL DEPT BOX 50005, S-104 05 STOCKHOLM, SWEDEN SN 0031-8949 J9 PHYS SCRIPTA JI Phys. Scr. PY 2003 VL T103 BP 34 EP 37 DI 10.1238/Physica.Topical.103a00034 PG 4 WC Physics, Multidisciplinary SC Physics GA 678FN UT WOS:000182854700007 ER PT J AU Glazunov, GP Volkov, ED Baron, DI Dolgiy, AP Konotopskiy, AL Hassanein, A AF Glazunov, GP Volkov, ED Baron, DI Dolgiy, AP Konotopskiy, AL Hassanein, A TI Effect of low/high hydrogen recycling OPERATION on palladium sputtering under steady state plasma impact SO PHYSICA SCRIPTA LA English DT Article; Proceedings Paper CT International Workshop on Hydrogen Isotopes in Fusion Reactor Materials CY MAY 22-24, 2002 CL TOKYO, JAPAN SP Atom Energy Soc Japan AB Simulation of sputtering experiments were carried out in steady state plasma of a mirror Penning discharge under low and high hydrogen recycling regimes. The samples for studies were Pd (99.98 purity) foils with and without hydrogen saturation of concentrations up to H/Pd = 0.65. Irradiation doses were 10(18)-10(19) ions/cm(2). No significant difference in Pd erosion behavior was found under hydrogen. helium or nitrogen plasma impact for the different recycling regimes. The absolute values of the erosion coefficient in helium and nitrogen plasmas are in sufficient agreement with ion sputtering data in literature. However. in the case of hydrogen plasma disagreement of more than an order of magnitude was observed. Possible reasons are suggested and discussed to explain such erosion behavior. C1 NSC KIPT, Inst Plasma Phys, UA-61108 Kharkov, Ukraine. Argonne Natl Lab, Argonne, IL 60439 USA. RP Glazunov, GP (reprint author), NSC KIPT, Inst Plasma Phys, UA-61108 Kharkov, Ukraine. NR 15 TC 7 Z9 7 U1 0 U2 1 PU ROYAL SWEDISH ACAD SCIENCES PI STOCKHOLM PA PUBL DEPT BOX 50005, S-104 05 STOCKHOLM, SWEDEN SN 0031-8949 J9 PHYS SCRIPTA JI Phys. Scr. PY 2003 VL T103 BP 89 EP 92 DI 10.1238/Physica.Topical.103a00089 PG 4 WC Physics, Multidisciplinary SC Physics GA 678FN UT WOS:000182854700020 ER PT J AU Errandonea, D Somayazulu, M Hausermann, D AF Errandonea, D Somayazulu, M Hausermann, D TI Phase transitions and amorphization of CaWO4 at high pressure SO PHYSICA STATUS SOLIDI B-BASIC RESEARCH LA English DT Article ID X-RAY-DIFFRACTION; ALKALINE-EARTH TUNGSTATES; RAMAN; MOLYBDATES; CRYSTALS; CDMOO4; PBMOO4; STATE; PBWO4; GPA AB The structural phase transitions in CaWO4 were studied by in situ energy-dispersive X-ray diffraction in a diamond-anvil-cell under high pressure up to 65 GPa at room temperature. The previously reported phase transition detected by Raman spectroscopy at 10 GPa was observed in our experiments at 12 GPa and the high-pressure phase was characterized. This transition is from the tetragonal scheelite structure (I4(1)/a) of CaWO4 to a monoclinic wolframite-type structure (P2/c) and a small discontinuity in the evolution of the unit-cell volume was detectable during the transformation (DeltaV/V < -1.9%). In addition, we observed that CaWO4 becomes amorphous at pressures exceeding 40 GPa and found that a novel high-pressure phase of CaWO4 can be obtained at 45 GPa after heating to 477 K and quenching to room temperature an amorphous sample. C1 Argonne Natl Lab, Adv Photon Source, Carnegie Inst Washington, HPCAT, Argonne, IL 60439 USA. RP Errandonea, D (reprint author), Argonne Natl Lab, Adv Photon Source, Carnegie Inst Washington, HPCAT, Bldg 434E,9700 S Cass Ave, Argonne, IL 60439 USA. RI Errandonea, Daniel/J-7695-2016 OI Errandonea, Daniel/0000-0003-0189-4221 NR 37 TC 63 Z9 65 U1 1 U2 16 PU WILEY-V C H VERLAG GMBH PI WEINHEIM PA PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY SN 0370-1972 J9 PHYS STATUS SOLIDI B JI Phys. Status Solidi B-Basic Res. PD JAN PY 2003 VL 235 IS 1 BP 162 EP 169 DI 10.1002/pssb.200301412 PG 8 WC Physics, Condensed Matter SC Physics GA 641NT UT WOS:000180751400029 ER PT J AU Schmidt, TJ Stamenkovic, V Ross, PN Markovic, NM AF Schmidt, TJ Stamenkovic, V Ross, PN Markovic, NM TI Temperature dependent surface electrochemistry on Pt single crystals in alkaline electrolyte - Part 3. The oxygen reduction reaction SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID RING-DISK ELECTRODE; ACID-SOLUTIONS; CO OXIDATION; PLATINUM; KINETICS; PARAMETERS; ACTIVATION; INTERFACE; PT(111); FILM AB The kinetics of the oxygen reduction reaction (ORR) was studied in alkaline electrolyte at 293-333 K on Pt(hkl) surfaces by means of the rotating ring-disk electrode technique with solution phase peroxide detected at the ring electrode. The ORR on Pt( hkl) was found to be highly structure sensitive with activities increasing in the sequence (111) > (100) > (110) (1 x 2). Very similar apparent activation energies (37-45+/- 5 kJ mol(-1), eta = 0.35 V) were found on all three surfaces. Furthermore, at elevated temperature, significantly smaller amounts of peroxide are formed in agreement with enhanced peroxide reduction rates by increasing temperature. We found that the Tafel slopes on all three single crystal surfaces decrease with increasing temperature, indicating that the log i-E relationship is not represented by a classical Butler Volmer expression. Based on the kinetic analysis of the polarization curves and from simulations of log i-E curves, we propose that the rate of the ORR on Pt(hkl) in alkaline solution is mainly determined by the potential/temperature dependent surface coverage by OHad. We propose two modes of action of the OHad : (i) OHad blocks the adsorption of O-2 on active platinum sites; and ( ii) OHad alters the adsorption energy of intermediates which are formed during the ORR on Pt sites. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA. RP Schmidt, TJ (reprint author), Celanese Ventures GmbH, D-65926 Frankfurt, Germany. RI Schmidt, Thomas/A-2586-2010 OI Schmidt, Thomas/0000-0002-1636-367X NR 37 TC 77 Z9 77 U1 13 U2 76 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD,, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1463-9076 J9 PHYS CHEM CHEM PHYS JI Phys. Chem. Chem. Phys. PY 2003 VL 5 IS 2 BP 400 EP 406 DI 10.1039/b208322a PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 631LN UT WOS:000180169400024 ER PT J AU Pritchina, EA Gritsan, NP Maltsev, A Bally, T Autrey, T Liu, YL Wang, YH Toscano, JP AF Pritchina, EA Gritsan, NP Maltsev, A Bally, T Autrey, T Liu, YL Wang, YH Toscano, JP TI Matrix isolation, time-resolved IR, and computational study of the photochemistry of benzoyl azide SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID QUADRATIC CONFIGURATION-INTERACTION; CORRELATED MOLECULAR CALCULATIONS; DENSITY-FUNCTIONAL THEORY; ACETYL-SUBSTITUTED AROYL; COUPLED-CLUSTER SINGLES; GAUSSIAN-BASIS SETS; PHOTOELECTRON-SPECTROSCOPY; VIBRATIONAL FREQUENCIES; INFRARED-SPECTROSCOPY; N-ACYLHYDRAZONES AB It was shown recently on the basis of DFT calculations (N. P. Gritsan and E. A. Pritchina, Mendeleev Commun., 2001, 11, 94) that the singlet states of aroylnitrenes undergo tremendous stabilization due to an extra N-O bonding interaction. To test experimentally the multiplicity and the structure of the lowest state of benzoylnitrenes we performed a study of their photochemistry in Ar matrices at 12 K. Formation of two species was observed on irradiation of benzoyl azide (1b) and its 4-acetyl derivative (1c). One of these species has an IR spectrum, which is consistent with that of isocyanate (2b, c). The IR and UV spectra of the second intermediate are in very good agreement with the calculated spectra of the singlet species (3b, c), whose structure is intermediate between that of a carbonylnitrene and an oxazirene. We further examined the photochemistry of benzoyl azide in solution at ambient temperatures by nanosecond time-resolved IR methods and obtained additional evidence for the singlet ground state of benzoylnitrene as well as insight into its reactivity in acetonitrile, cyclohexane, and dichloromethane. The above experiments were accompanied by quantum chemical calculations which included also a thorough investigation of the parent species, formylnitrene, at different levels of theory. C1 Russian Acad Sci, Inst Chem Kinet & Combust, Siberian Branch, Novosibirsk 630090, Russia. Novosibirsk State Univ, Novosibirsk 630090, Russia. Univ Fribourg, Dept Chem, CH-1700 Fribourg, Switzerland. Pacific NW Natl Lab, Richland, WA 99352 USA. Johns Hopkins Univ, Dept Chem, Baltimore, MD 21218 USA. RP Gritsan, NP (reprint author), Russian Acad Sci, Inst Chem Kinet & Combust, Siberian Branch, Novosibirsk 630090, Russia. RI Nina, Gritsan/A-6409-2009 NR 69 TC 54 Z9 55 U1 0 U2 23 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1463-9076 J9 PHYS CHEM CHEM PHYS JI Phys. Chem. Chem. Phys. PY 2003 VL 5 IS 6 BP 1010 EP 1018 DI 10.1039/b209775c PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 650XG UT WOS:000181288700005 ER PT J AU DeSain, JD Klippenstein, SJ Taatjes, CA AF DeSain, JD Klippenstein, SJ Taatjes, CA TI Time-resolved measurements of OH and HO2 product formation in pulsed-photolytic chlorine atom initiated oxidation of neopentane SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID PLUS O-2 REACTIONS; EVALUATED KINETIC DATA; MOLECULAR-OXYGEN; CHEMICAL-KINETICS; C2H5+O-2 REACTION; BUTYL RADICALS; COMBUSTION; ETHYL; ALKYL; THERMOCHEMISTRY AB The time-resolved production of HO2 and OH has been measured in pulsed-photolytic Cl-initiated oxidation of neopentane (2,2-dimethylpropane) between 573 and 750 K. The initial reaction in the oxidation process is the reaction of the neopentyl radical (R), formed by Cl + neopentane, with O-2. The neopentylperoxy radical (RO2) formed can then isomerize to a hydroperoxyalkyl radical (QOOH) and dissociate. The production of HO2 in the neopentane oxidation is attributed to secondary reaction of the RO2 or QOOH radicals, since the neopentylperoxy radical cannot form a conjugate alkene + HO2, and formation of 1,1-dimethylcyclopropane + HO2 is energetically inaccessible. Significant HO2 formation is measured above 623 K, and the formation of HO2 increases with increasing temperature. The overall amount of HO2 produced increases with increasing O-2 at 673 K, consistent with the proposed role for QOOH+ O-2 in chain branching for this system. A simple kinetic model is constructed based on comparison with previous time- dependent master equation calculations of analogous processes in the reaction of n-propyl with O-2. The present experimental results require inclusion of formally direct pathways for several chemical activation reactions, especially direct production of OH from R+O-2. Estimation of these direct components by analogy with n-propyl+O-2 is reasonably successful. The isomerization from RO2 to QOOH is found to be significantly larger than previously proposed. A possible course towards a generally applicable theoretically-based model for alkyl radical oxidation is suggested. C1 Sandia Natl Labs, Combust Res Facil, Livermore, CA 94551 USA. RP Taatjes, CA (reprint author), Aerosp Corp, 2350 El Segundo Blvd,M5-754, El Segundo, CA 90245 USA. OI Klippenstein, Stephen/0000-0001-6297-9187 NR 43 TC 23 Z9 23 U1 2 U2 17 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1463-9076 J9 PHYS CHEM CHEM PHYS JI Phys. Chem. Chem. Phys. PY 2003 VL 5 IS 8 BP 1584 EP 1592 DI 10.1039/b211452f PG 9 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 661YY UT WOS:000181919000016 ER PT J AU Mellot-Draznieks, C Rodriguez-Carvajal, J Cox, DE Cheetham, AK AF Mellot-Draznieks, C Rodriguez-Carvajal, J Cox, DE Cheetham, AK TI Adsorption of chlorofluorocarbons in nanoporous solids; a combined powder neutron diffraction and computational study of CFCl(3) in NaY zeolite SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID MONTE-CARLO SIMULATIONS; FAUJASITE-TYPE ZEOLITES; X-RAY; MAS NMR; CATION MIGRATION; HYDROFLUOROCARBONS; CATALYSTS; BINDING; TRICHLOROETHYLENE; SPECTROSCOPY AB The crystal structure of NaY (Na(54)Si(138)Al(54)O(384))+ CFCl(3) has been determined at 20 K by Rietveld analysis of powder neutron diffraction data in space group Fd (3) over barm. The sodium cations were located preferentially in sites II, which are fully-occupied and also in sites I, which are half-occupied. A new cation position in the beta-cages was detected around x = 0.125, y = 0.125, z = 0.031. Important cation migration is observed upon adsorption of CFCl(3), as shown by the absence of cations in sites I', known to be a favorable cation site in bare NaY, together with the detection of this new site in the beta-cages. Part of extraframework cations remained undetected, that were assumed to be located in the supercages in low symmetry sites. The CFCl(3) molecules are found in the 12-ring windows, where they accomodate Cl...O(zeolite) and F...O(zeolite) van der Waals interactions together with Cl...Na(II) electrostatic interactions. (N,V,T) Monte Carlo simulations were performed in order to elucidate the role of extraframework cations in the adsorption of CFCl(3) in NaY. They show that the presence of Na ions in the 12-ring window (sites III') has to be taken into account in order to get adsorption geometries consistent with that obtained from neutron diffraction. C1 Univ Versailles, Inst Lavoisier, F-78035 Versailles, France. CEA Saclay, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France. Brookhaven Natl Lab, Upton, NY 11973 USA. Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA. RP Mellot-Draznieks, C (reprint author), Univ Versailles, Inst Lavoisier, 45 Ave Etats Unis, F-78035 Versailles, France. EM mellot@chimie.uvsq.fr RI Rodriguez-Carvajal, Juan/C-4362-2008 OI Rodriguez-Carvajal, Juan/0000-0001-5582-2632 NR 43 TC 19 Z9 19 U1 0 U2 8 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1463-9076 J9 PHYS CHEM CHEM PHYS JI Phys. Chem. Chem. Phys. PY 2003 VL 5 IS 9 BP 1882 EP 1887 DI 10.1039/b212330b PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 668JE UT WOS:000182285900021 ER PT J AU Mason, TO Gonzalez, GB Hwang, JH Kammler, DR AF Mason, TO Gonzalez, GB Hwang, JH Kammler, DR TI Point defects and related properties of highly co-doped bixbyite In2O3 SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article; Proceedings Paper CT 78th International Discussion Meeting of the Deutsche-Bunsen-Gesellschaft-fur-Physikalische-Chemie CY OCT 06-09, 2002 CL VAALS, NETHERLANDS SP Deutsch Bunsen Gesell Physikal ID TRANSPARENT CONDUCTING OXIDES; RAY-ABSORPTION-SPECTROSCOPY; INDIUM-TIN-OXIDE; ELECTRICAL-PROPERTIES; PHASE-RELATIONS; SYSTEM; DIFFRACTION; CHEMISTRY AB The method of co-doping has been employed to achieve and study the influence of high defect populations in bixbyite In2O3. Substantial metastable Sn-doping levels can be achieved in nanocrystalline In2O3 with associated co-doping by oxygen interstitials. The resulting electrical properties, diffraction data (X-ray and neutron), and EXAFS studies support the presence of 2 : 1 Sn-oxygen interstitial point defect clusters. Upon reduction, some of these clusters can be reduced to liberate donors and generate charge carriers. Extensive Cd/Sn co-substitution for indium in In2O3 has been achieved in equilibrium solid solutions. This self-compensated (isovalent) and relatively size-matched substitution reveals a tendency for off-stoichiometry in favor of donors, resulting in "self-doped'' behavior irrespective of oxygen partial pressure. Rami. cations of bixbyite defect structure for transparent electrode applications are discussed. C1 Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA. Hongik Univ, Seoul 121791, South Korea. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Mason, TO (reprint author), Northwestern Univ, Dept Mat Sci & Engn, 3037 Cook Hall, Evanston, IL 60208 USA. RI Mason, Thomas/B-7528-2009 NR 42 TC 15 Z9 15 U1 1 U2 10 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1463-9076 J9 PHYS CHEM CHEM PHYS JI Phys. Chem. Chem. Phys. PY 2003 VL 5 IS 11 BP 2183 EP 2189 DI 10.1039/b300171g PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 680DQ UT WOS:000182961400005 ER PT J AU Routbort, J Ralph, J Cook, RE Clauss, C de Arellano-Lopez, AR AF Routbort, J Ralph, J Cook, RE Clauss, C de Arellano-Lopez, AR TI Creep of (La0.55Sr0.45)(0.99)Mn1-yGayO3 SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article; Proceedings Paper CT 78th International Discussion Meeting of the Deutsche-Bunsen-Gesellschaft-fur-Physikalische-Chemie CY OCT 06-09, 2002 CL VAALS, NETHERLANDS SP Deutsch Bunsen Gesell Physikal ID TEMPERATURE DEFORMATION; OXIDE; CONDUCTOR; CERAMICS AB Steady-state compressive creep was measured in (La0.55Sr0.45)(0.99)Mn1-yGayO3 at temperatures from 1200 to 1270degreesC in air at stresses (sigma) from 13 to 40 MPa. The Ga concentration was y = 0, 0.05, and 0.10. Strains to 0.14 were obtained. In the creep equation for strain rate, (epsilon) over dot = An exp(-Q/RT), stress exponents (n) were between 1.3 and 1.7, indicating that diffusional flow is the dominant creep mechanism, and the activation energy (Q) was found to vary from 355 kJ mol(-1) for y = 0 to 485 kJ mol(-1) for y = 0.10. C1 Argonne Natl Lab, Argonne, IL 60439 USA. Univ Sevilla, E-41080 Seville, Spain. RP Routbort, J (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. OI Clauss Klamp, Caroline Maria/0000-0003-4425-4814; R. de Arellano Lopez, Antonio/0000-0002-7443-0244 NR 19 TC 1 Z9 1 U1 0 U2 0 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1463-9076 J9 PHYS CHEM CHEM PHYS JI Phys. Chem. Chem. Phys. PY 2003 VL 5 IS 11 BP 2232 EP 2236 DI 10.1039/b300149k PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 680DQ UT WOS:000182961400012 ER PT J AU Beran, GJO Gwaltney, SR Head-Gordon, M AF Beran, GJO Gwaltney, SR Head-Gordon, M TI Approaching closed-shell accuracy for radicals using coupled cluster theory with perturbative triple substitutions SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID DENSITY-FUNCTIONAL THEORY; HARMONIC VIBRATIONAL FREQUENCIES; SYMMETRY-BREAKING PROBLEMS; WAVE-FUNCTIONS; DOUBLES MODEL; SPIN-CONTAMINATION; BRUECKNER ORBITALS; HARTREE-FOCK; EQUILIBRIUM GEOMETRIES; BASIS-SETS AB The erratic performance of CCSD(T) for radicals is analyzed using non-Hartree-Fock references as a starting point for correlations and by testing the (2) approach as an alternative to (T) for including higher-order correlation effects. Though CCSD(2) improves upon CCSD(T), correlating from a better-behaved reference makes both theories robust. Comparisons of calculated harmonic frequencies against experiment in a set of diatomic radicals from Brueckner-like orbitals demonstrate improvement approaching closed-shell accuracy. Additionally, we find that using BLYP Kohn-Sham orbitals yields similar improvements, and they are therefore a useful, inexpensive reference for high-level correlation methods in difficult systems. Root-mean-square errors of 1.0-1.2% are found in the cc-pVQZ basis for predicted harmonic frequencies in the test set using OD(T) and KS-CCSD(T), making these approaches quite competitive with CCSD(T) for closed-shell molecules. Finally, these improvements are correlated with spin contamination and the rate of change of the electron density with nuclear displacement. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem, Div Chem Sci, Berkeley, CA 94720 USA. Mississippi State Univ, Dept Chem, Mississippi State, MS 39762 USA. RP Head-Gordon, M (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Chem, Div Chem Sci, Berkeley, CA 94720 USA. RI Beran, Gregory/B-8684-2011; OI Beran, Gregory/0000-0002-2229-2580; Gwaltney, Steven/0000-0003-3833-5087 NR 48 TC 42 Z9 42 U1 0 U2 6 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1463-9076 J9 PHYS CHEM CHEM PHYS JI Phys. Chem. Chem. Phys. PY 2003 VL 5 IS 12 BP 2488 EP 2493 DI 10.1039/b304542k PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 687RH UT WOS:000183390100003 ER PT J AU Dreuw, A Fleming, GR Head-Gordon, M AF Dreuw, A Fleming, GR Head-Gordon, M TI Chlorophyll fluorescence quenching by xanthophylls SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID DENSITY-FUNCTIONAL THEORY; CORRECT ASYMPTOTIC-BEHAVIOR; LIGHT-HARVESTING COMPLEX; CAROTENOID S-1 STATE; ENERGY-TRANSFER; GREEN PLANTS; EXCITATION-SPECTRA; PHOTOSYSTEM-II; CYCLE; ZEAXANTHIN AB The interactions of the xanthophylls zeaxanthin, antheraxanthin and violaxanthin with chlorophyll, which are relevant for the chlorophyll fluorescence quenching in the non-photochemical quenching (NPQ) process in green plants, are investigated by means of quantum chemical methods. In particular, we use a hybrid approach consisting of time-dependent density-functional theory (TDDFT) and configuration interactions singles (CIS), since present-day TDDFT alone fails in describing relevant long-range charge-transfer states. Calculation of the energetically lowest excited states of a zea-chl dimer along the intermolecular distance coordinate shows that two mechanisms for chlorophyll fluorescence quenching are possible: quenching via excitation-energy transfer and electron-transfer quenching. The relevance of both mechanisms is discussed by comparison to corresponding anthera-chl and vio-chl dimers and the dependence of the mechanism on the geometrical arrangement of the dimers is illuminated. It is pointed out that the typical absorption band of the zeaxanthin radical cation can be used to experimentally determine whether a zea-chl dimer is present during NPQ. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Chem Sci & Phys Biosci Div, Berkeley, CA 94720 USA. RP Dreuw, A (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. NR 51 TC 101 Z9 102 U1 1 U2 16 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1463-9076 J9 PHYS CHEM CHEM PHYS JI Phys. Chem. Chem. Phys. PY 2003 VL 5 IS 15 BP 3247 EP 3256 DI 10.1039/b304944b PG 10 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 701UC UT WOS:000184186500023 ER PT J AU Dosche, C Kumke, MU Ariese, F Bader, AN Gooijer, C Dosa, PI Han, S Miljanic, OS Vollhardt, KPC Puchta, R Hommes, NJRV AF Dosche, C Kumke, MU Ariese, F Bader, AN Gooijer, C Dosa, PI Han, S Miljanic, OS Vollhardt, KPC Puchta, R Hommes, NJRV TI Shpol'skii spectroscopy and vibrational analysis of [N]phenylenes SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID CHEMICAL-SHIFTS; PHENYLENES; AROMATICITY; <4>PHENYLENE; HEXAETHYNYLBENZENE; <7>PHENYLENE; PHENYLENES; HELIPHENES; TOPOLOGY AB Vibrationally resolved fluorescence spectra of four angular [N] phenylenes were recorded with laser excited Shpol'skii spectroscopy (LESS) in an n-octane matrix at 10 K. In general, the same vibrational frequencies were observed in the fluorescence excitation and emission spectra, indicating that the geometries of ground and electronically excited state are very similar. Because of intensity borrowing from the S-2 state, vibrations of two different symmetries were observed in the fluorescence excitation spectra of angular [3] phenylene and zig-zag [5] phenylene. This finding allowed the location of the S-2 state for these compounds. DFT calculations (RB3LYP/6-31G*) of the ground state vibrational frequencies were made. The calculated vibrational modes were in reasonably good agreement with the experimental data. A new very low-frequency vibration of approximately 100 cm(-1) was predicted and experimentally confirmed for all [N] phenylenes investigated. This vibration seems to be unique for [N] phenylenes and is attributed to an in-plane movement of the carbon backbone. C1 Univ Potsdam, Inst Chem, D-14476 Golm, Germany. Vrije Univ Amsterdam, Dept Analyt Chem & Appl Spect, NL-1081 HV Amsterdam, Netherlands. Univ Calif Berkeley, Dept Chem, Ctr New Direct Organ Synth, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. Univ Erlangen Nurnberg, Comp Chem Ctr, D-91052 Erlangen, Germany. RP Kumke, MU (reprint author), Univ Potsdam, Inst Chem, Karl Liebknecht Str 24-25, D-14476 Golm, Germany. RI Puchta, Ralph/I-3356-2014; OI Puchta, Ralph/0000-0003-1370-3875; Ariese, Freek/0000-0002-8756-7223 NR 31 TC 13 Z9 13 U1 0 U2 2 PU ROYAL SOC CHEMISTRY PI CAMBRIDGE PA THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND SN 1463-9076 J9 PHYS CHEM CHEM PHYS JI Phys. Chem. Chem. Phys. PY 2003 VL 5 IS 20 BP 4563 EP 4569 DI 10.1039/b308036f PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 732RW UT WOS:000185960200034 ER PT J AU Aguilar, A West, JB Phaneuf, RA Brooks, RL Folkmann, F Kjeldsen, H Bozek, JD Schlachter, AS Cisneros, C AF Aguilar, A West, JB Phaneuf, RA Brooks, RL Folkmann, F Kjeldsen, H Bozek, JD Schlachter, AS Cisneros, C TI Photoionization of isoelectronic ions: Mg+ and Al2+ SO PHYSICAL REVIEW A LA English DT Article ID ABSOLUTE CROSS-SECTIONS AB High-resolution measurements of the photoionization cross sections of the Na-isoelectronic ions Mg+ and Al2+ are presented, to be compared with earlier measurements in which structure in the most prominent peaks was unresolved. These measurements have been normalized to the earlier ones in order to provide values of the oscillator strengths of the newly resolved peaks, and comparison is made with multiconfiguration Hartree-Fock calculations. C1 Univ Nevada, Dept Phys, Reno, NV 89557 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. CLRC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England. Univ Guelph, Guelph Waterloo Phys Inst, Guelph, ON N1G 2W1, Canada. Univ Aarhus, Inst Phys & Astron, DK-8000 Aarhus C, Denmark. Univ Nacl Autonoma Mexico, Ctr Ciencias Fis, Cuernavaca 62131, Morelos, Mexico. RP Aguilar, A (reprint author), Univ Nevada, Dept Phys, MS220, Reno, NV 89557 USA. RI Bozek, John/E-4689-2010; Bozek, John/E-9260-2010 OI Bozek, John/0000-0001-7486-7238 NR 19 TC 11 Z9 11 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD JAN PY 2003 VL 67 IS 1 AR 012701 DI 10.1103/PhysRevA.67.012701 PG 8 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 642KY UT WOS:000180804600063 ER PT J AU Cohen, JS AF Cohen, JS TI Comment on "Laser-assisted formation of antihydrogen" SO PHYSICAL REVIEW A LA English DT Letter ID TUNNELING IONIZATION; FIELD AB In a recent paper, Whitehead, McCann, and Shimamura [Phys. Rev. A 64, 023401 (2001)] presented classical-trajectory Monte Carlo (CTMC) calculations of the effects of laser fields on the cross section for antihydrogen formation in collisions of antiprotons with positronium. They also use the same method to calculate the photoionization rate of isolated positronium in a strong field. The purpose of this Comment is to point out (i) the criteria for validity of the quasiclassical approximation are not satisfied for all the conditions used; (ii) some of their numerical results do not agree with the values obtained with a corroborated code; (iii) the ambiguity of a cross section when the target can ionize even before the projectile arrives; and (iv) the essential effect of quantum-mechanical tunneling on the strong-field ionization rate. A recently published method allowing tunneling in a CTMC calculation [J. S. Cohen, Phys. Rev. A 64, 043412 (2001)] is used for (iv). It is concluded that the laser effect on formation of antihydrogen may be much greater than that found by Whitehead , but the pulse must be better characterized for quantitative predictions. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Cohen, JS (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. NR 8 TC 0 Z9 0 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD JAN PY 2003 VL 67 IS 1 AR 017401 DI 10.1103/PhysRevA.67.017401 PG 3 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 642KY UT WOS:000180804600142 ER PT J AU Kim, YH Kulik, SP Chekhova, MV Grice, WP Shih, Y AF Kim, YH Kulik, SP Chekhova, MV Grice, WP Shih, Y TI Experimental entanglement concentration and universal Bell-state synthesizer SO PHYSICAL REVIEW A LA English DT Article ID PARAMETRIC DOWN-CONVERSION; 2-PHOTON ENTANGLEMENT; INTERFERENCE; PUMP AB We report a Bell-state synthesizer in which an interferometric entanglement concentration scheme is used. An initially mixed polarization state from type-II spontaneous parametric down-conversion becomes entangled after the interferometric entanglement concentration. This Bell-state synthesizer is universal in the sense that the output polarization state is not affected by spectral filtering, crystal thickness, and, most importantly, the choice of pump source. It is also robust against environmental disturbance and a more general state, partially mixed-partially entangled state, can be readily generated as well. C1 Oak Ridge Natl Lab, Ctr Engn Sci Adv Res, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA. Moscow MV Lomonosov State Univ, Dept Phys, Moscow, Russia. RP Kim, YH (reprint author), Oak Ridge Natl Lab, Ctr Engn Sci Adv Res, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. EM kimy@ornl.gov RI Grice, Warren/L-8466-2013; Kim, Yoonho/D-2591-2012; Chekhova, Maria/A-4659-2017 OI Chekhova, Maria/0000-0002-3399-2101 NR 26 TC 64 Z9 64 U1 2 U2 7 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 EI 1094-1622 J9 PHYS REV A JI Phys. Rev. A PD JAN PY 2003 VL 67 IS 1 AR 010301 DI 10.1103/PhysRevA.67.010301 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 642KY UT WOS:000180804600002 ER PT J AU Knickelbein, MB AF Knickelbein, MB TI Photoionization studies of chromium clusters: Ionization energies of Cr-4 to Cr-25 SO PHYSICAL REVIEW A LA English DT Article ID TRANSITION-METAL CLUSTERS; GUIDED ION-BEAM; BOND-ENERGIES; NIOBIUM CLUSTERS; PHOTOELECTRON-SPECTROSCOPY; POTENTIALS; ATOM; PARTICLES; DIMERS; OXIDE AB The photoionization spectra of isolated chromium clusters from Cr-4 to Cr-25 have been recorded. The vertical ionization energies (E-i(v)) derived from the spectra decrease discontinuously with increasing cluster size. The E-i(v) values determined for Cr-n species were, in most cases, within 0.2 eV of those of the corresponding CrnO and CrnO2 species, recently reported by Wang [Appl. Phys. B 73, 417 (2001)], with the largest differences observed for several of the smaller clusters. The E-i(v) determined for Cr-4 was 0.7 ev larger than that found previously for Cr4O, suggesting that in this case the bare cluster and oxide have different structures. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Knickelbein, MB (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 46 TC 19 Z9 20 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD JAN PY 2003 VL 67 IS 1 AR 013202 DI 10.1103/PhysRevA.67.013202 PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 642KY UT WOS:000180804600080 ER PT J AU Milman, P Ollivier, H Raimond, JM AF Milman, P Ollivier, H Raimond, JM TI Universal quantum cloning in cavity QED SO PHYSICAL REVIEW A LA English DT Article ID STATE; TELEPORTATION; PHOTON AB We propose an implementation of an universal quantum cloning machine [UQCM, V. Buzek and M. Hillery, Phys. Rev. A 54, 1844 (1996)] in a cavity quantum electrodynamics experiment. This UQCM acts on the electronic states of atoms that interact with the electromagnetic field of a high-Q cavity. We discuss here the specific case of the 1-->2 cloning process using either a one- or a two-cavity configuration. C1 Ecole Normale Super, Dept Phys, Lab Kastler Brossel, F-75231 Paris 05, France. Coll France, F-75005 Paris, France. Inst Natl Rech Informat & Automat, Projet CODES, F-78153 Le Chesnay, France. Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Milman, P (reprint author), Ecole Normale Super, Dept Phys, Lab Kastler Brossel, 24 Rue Lhmond, F-75231 Paris 05, France. NR 28 TC 47 Z9 52 U1 1 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD JAN PY 2003 VL 67 IS 1 AR 012314 DI 10.1103/PhysRevA.67.012314 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 642KY UT WOS:000180804600040 ER PT J AU Poulin, D Blume-Kohout, R AF Poulin, D Blume-Kohout, R TI Compatibility of quantum states SO PHYSICAL REVIEW A LA English DT Article AB We introduce a measure of compatibility between quantum states-the likelihood that two density matrices describe the same object. Our measure is motivated by two elementary requirements, which lead to a natural definition. We list some properties of this measure, and discuss its relation to the problem of combining two observers' states of knowledge. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Poulin, D (reprint author), Univ Waterloo, Dept Phys, Waterloo, ON N2L 3G1, Canada. RI Poulin, David/A-1481-2010 NR 8 TC 4 Z9 4 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD JAN PY 2003 VL 67 IS 1 AR 010101 DI 10.1103/PhysRevA.67.010101 PG 4 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 642KY UT WOS:000180804600001 ER PT J AU Stokely, CL Lancaster, JC Dunning, FB Arbo, DG Reinhold, CO Burgdorfer, J AF Stokely, CL Lancaster, JC Dunning, FB Arbo, DG Reinhold, CO Burgdorfer, J TI Production of quasi-one-dimensional very-high-n Rydberg atoms SO PHYSICAL REVIEW A LA English DT Article ID IONIZATION; STATES; PULSES AB We demonstrate that strongly polarized quasi-one-dimensional very-high-n (potassium) Rydberg atoms can be produced by photoexcitation of selected Stark states in the presence of a weak dc field. Calculations show that, for m=0 states, significant photoexcitation occurs only in the vicinity of the Stark-shifted s, p, and d levels, and that those states located near the Stark-shifted d level have sizable polarizations. These predictions are confirmed by experiment. The degree of polarization of the product states is analyzed by studying differences in their ionization characteristics when subject to short pulsed electric fields applied parallel and antiparallel to the dc field. C1 Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA. Rice Univ, Rice Quantum Inst, Houston, TX 77005 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA. Inst Astron & Space Phys, Buenos Aires, DF, Argentina. Vienna Univ Technol, Inst Theoret Phys, A-1040 Vienna, Austria. RP Stokely, CL (reprint author), Rice Univ, Dept Phys & Astron, MS 61,6100 Main St, Houston, TX 77005 USA. OI Reinhold, Carlos/0000-0003-0100-4962 NR 18 TC 46 Z9 46 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD JAN PY 2003 VL 67 IS 1 AR 013403 DI 10.1103/PhysRevA.67.013403 PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 642KY UT WOS:000180804600084 ER PT J AU Utter, SB Beiersdorfer, P Trabert, E AF Utter, SB Beiersdorfer, P Trabert, E TI Wavelength measurement of the prominent M1 transition in the ground state of Ti-like Pt, Au, and Tl ions SO PHYSICAL REVIEW A LA English DT Article ID MAGNETIC DIPOLE TRANSITIONS; ELECTRON-BEAM; ENERGY DIFFERENCES; TRAP; W52+; TERM AB Using a high-efficiency, transmission grating spectrometer at an electron-beam ion trap, the 3s(2)3p(6)3d(4) J=2-3 transition in the ground configuration of the Ti-like ions Pt56+, Au57+, and Tl59+ was measured. The measurements achieved up to 20 times better precision than previously reported other high-Z measurements. C1 Lawrence Livermore Natl Lab, Dept Phys & Adv Technol, Livermore, CA 94550 USA. RP Utter, SB (reprint author), Spectra Phys, Mt View, CA 94039 USA. NR 24 TC 14 Z9 14 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD JAN PY 2003 VL 67 IS 1 AR 012508 DI 10.1103/PhysRevA.67.012508 PG 5 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 642KY UT WOS:000180804600061 ER PT J AU Wirtz, L Reinhold, CO Lemell, C Burgdorfer, J AF Wirtz, L Reinhold, CO Lemell, C Burgdorfer, J TI Liouville master equation for multielectron dynamics: Neutralization of highly charged ions near a LiF surface SO PHYSICAL REVIEW A LA English DT Article ID PARTICLE-MODEL POTENTIALS; METAL-SURFACES; CROSS-SECTIONS; HOLLOW ATOMS; GRAZING SCATTERING; BARRIER MODEL; COLLISIONS; STATE; HYDROGEN; PROJECTILES AB We present a simulation of the neutralization of highly charged ions in front of a lithium fluoride surface including the close-collision regime above the surface. The present approach employs a Monte Carlo solution of the Liouville master equation for the joint probability density of the ionic motion and the electronic population of the projectile and the target surface. It includes single as well as double particle-hole (de)excitation processes and incorporates electron correlation effects through the conditional dynamics of population strings. The input in terms of elementary one- and two-electron transfer rates is determined from classical trajectory Monte Carlo calculations as well as quantum-mechanical Auger calculations. For slow projectiles and normal incidence, the ionic motion depends sensitively on the interplay between image acceleration towards the surface and repulsion by an ensemble of positive hole charges in the surface ("trampoline effect"). For Ne10+ we find that image acceleration is dominant and no collective backscattering high above the surface takes place. For grazing incidence, our simulation delineates the pathways to complete neutralization. In accordance with recent experimental observations, most ions are reflected as neutral or even as singly charged negative particles, irrespective of the charge state of the incoming ions. C1 Vienna Univ Technol, Inst Theoret Phys, A-1040 Vienna, Austria. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Wirtz, L (reprint author), Vienna Univ Technol, Inst Theoret Phys, Wiedner Hauptstr 8-10-136, A-1040 Vienna, Austria. RI Lemell, Christoph/B-5147-2009 OI Lemell, Christoph/0000-0003-2560-4495 NR 59 TC 25 Z9 25 U1 0 U2 4 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD JAN PY 2003 VL 67 IS 1 AR 012903 DI 10.1103/PhysRevA.67.012903 PG 19 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 642KY UT WOS:000180804600078 ER PT J AU Zurek, WH AF Zurek, WH TI Quantum discord and Maxwell's demons SO PHYSICAL REVIEW A LA English DT Article ID DECOHERENCE AB Quantum discord was proposed as an information-theoretic measure of the "quantumness" of correlations. I show that discord determines the difference between the efficiency of quantum and classical Maxwell's demons-that is, entities that can or cannot measure nonlocal observables or carry out conditional quantum operations-in extracting work from collections of correlated quantum systems. C1 Los Alamos Natl Lab, Theory Div, Los Alamos, NM 87545 USA. RP Zurek, WH (reprint author), Los Alamos Natl Lab, Theory Div, MS B288, Los Alamos, NM 87545 USA. NR 30 TC 221 Z9 226 U1 2 U2 19 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1050-2947 J9 PHYS REV A JI Phys. Rev. A PD JAN PY 2003 VL 67 IS 1 AR 012320 DI 10.1103/PhysRevA.67.012320 PG 6 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 642KY UT WOS:000180804600046 ER PT J AU Alchagirov, AB Perdew, JP Boettger, JC Albers, RC Fiolhais, C AF Alchagirov, AB Perdew, JP Boettger, JC Albers, RC Fiolhais, C TI Energy and pressure versus volume: Equations of state motivated by the stabilized jellium model - Reply SO PHYSICAL REVIEW B LA English DT Editorial Material ID STRONG COMPRESSION; SOLIDS AB In a recent paper [Phys. Rev. B 63, 224115 (2001)], we proposed two equations of state based upon microscopic insight into the cohesion of a solid: the stabilized jellium equation of state (SJEOS) and its augmented version (ASJEOS). In this Reply, we address the issues raised by Holzapfel in his Comment on that paper. We show that, according to the number of independent fitting parameters used, our ASJEOS is comparable with Holzapfel's third-order adapted polynomial (AP3) and that the ASJEOS performs slightly better than AP3 for the materials (Al, Li, and Mo) and pressure range (Pless than or similar to15 Mbar) discussed in our paper. We compare the advantages and the disadvantages of ASJEOS and AP3, and discuss the behavior of the equations of state as they approach the strong-compression and strong-expansion limits. C1 Tulane Univ, Dept Phys, New Orleans, LA 70118 USA. Tulane Univ, Quantum Theory Grp, New Orleans, LA 70118 USA. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Univ Coimbra, Ctr Computat Phys, P-3000 Coimbra, Portugal. RP Alchagirov, AB (reprint author), Tulane Univ, Dept Phys, New Orleans, LA 70118 USA. NR 10 TC 0 Z9 0 U1 0 U2 5 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 2003 VL 67 IS 2 AR 026103 DI 10.1103/PhysRevB.67.026103 PG 5 WC Physics, Condensed Matter SC Physics GA 644LH UT WOS:000180918900105 ER PT J AU Antonov, VN Harmon, BN Yaresko, AN AF Antonov, VN Harmon, BN Yaresko, AN TI Electronic structure and x-ray magnetic circular dichroism in Fe3O4 and Mn-, Co-, or Ni-substituted Fe3O4 SO PHYSICAL REVIEW B LA English DT Article ID GROUND-STATE MOMENTS; VERWEY TRANSITION; SUM-RULES; MAGNETOOPTICAL PROPERTIES; LEVEL PHOTOEMISSION; ANGULAR-DEPENDENCE; SPIN POLARIZATION; EMISSION-SPECTRA; ABSORPTION; FERRITES AB The electronic structure of charge-ordered magnetite (Fe3O4) below the Verwey transition and Mn-, Co-, or Ni-substituted Fe3O4 are investigated theoretically from first principles, using the fully relativistic Dirac linear muffin-tin orbital band-structure method. The electronic structure is obtained with the local spin-density approximation (LSDA), as well as with the so-called LSDA+U approach, for which the charge ordering is found to be a stable solution in contrast to a metallic state given by the LSDA. The x-ray absorption spectra as well as the x-ray magnetic circular dichroism spectra at the K, L-2,L-3, and M-2,M-3 edges for transition metal sites are calculated. A good agreement between theory and experiment is obtained. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany. Inst Met Phys, UA-03142 Kiev, Ukraine. RP Iowa State Univ, Ames Lab, Ames, IA 50011 USA. EM antonov@ameslab.gov NR 108 TC 86 Z9 86 U1 6 U2 34 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 2003 VL 67 IS 2 AR 024417 DI 10.1103/PhysRevB.67.024417 PG 14 WC Physics, Condensed Matter SC Physics GA 644LH UT WOS:000180918900068 ER PT J AU Asensio, MC Avila, J Roca, L Tejeda, A Gu, GD Lindroos, M Markiewicz, RS Bansil, A AF Asensio, MC Avila, J Roca, L Tejeda, A Gu, GD Lindroos, M Markiewicz, RS Bansil, A TI Emergence of multiple Fermi surface maps in angle-resolved photoemission from Bi2Sr2CaCu2O8+delta SO PHYSICAL REVIEW B LA English DT Article ID SHIFT PHOTOELECTRON DIFFRACTION; ELECTRONIC-STRUCTURE; OVERDOPED BI2SR2CACU2O8+DELTA; ENERGY; ALLOYS; STATES; BANDS; SUPERCONDUCTOR; SPECTROSCOPY; SPECTRA AB We report angle-resolved photoemission spectra (ARPES) for emission from the Fermi energy (E-F) over a large area of the (k(x),k(y)) plane using 21.2 and 32 eV photon energies in two distinct polarizations from an optimally doped single crystal of Bi2Sr2CaCu2O8+delta (Bi2212), together with extensive first-principles simulations of the ARPES intensities. The results display a wide-ranging level of accord between theory and experiment, demonstrating that the ARPES matrix elements can produce a striking variety of Fermi surface maps, especially in the presence of secondary features arising from modulations of the underlying tetragonal system. Our analysis demonstrates how the energy and polarization dependency of the ARPES matrix element can help to disentangle the primary contributions to the spectrum from the secondary features and indicates that secondary features reflect a direct modulation of the CuO2 planes. C1 Univ Paris 11, CSIC, Inst Ciencias Mat Madrid, Madrid 28049, Spain. Univ Paris 11, LURE, F-91898 Orsay, France. Brookhaven Natl Lab, Dept Phys, Upton, NY 11975 USA. Tampere Univ Technol, Inst Phys, FIN-33101 Tampere, Finland. Northeastern Univ, Dept Phys, Boston, MA 02115 USA. RP Univ Paris 11, CSIC, Inst Ciencias Mat Madrid, Madrid 28049, Spain. EM asensio@lure.u-psud.fr RI Tejeda, Antonio/C-4711-2014 OI Tejeda, Antonio/0000-0003-0125-4603 NR 41 TC 40 Z9 40 U1 0 U2 7 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 2003 VL 67 IS 1 AR 014519 DI 10.1103/PhysRevB.67.014519 PG 7 WC Physics, Condensed Matter SC Physics GA 642XH UT WOS:000180830400089 ER PT J AU Barnes, T AF Barnes, T TI Boundaries, cusps, and discontinuities in the multimagnon continua of one-dimensional quantum spin systems SO PHYSICAL REVIEW B LA English DT Article ID EXCITATION SPECTRUM; MAGNETIC-FIELD; STATES; CHAIN; TRANSITION; EXPANSIONS; DYNAMICS; LADDERS AB The multimagnon continua of one-dimensional quantum spin systems possess several interesting singular features that may soon be accessible experimentally through inelastic neutron scattering. These include cusps and composition discontinuities in the boundary envelopes of two-magnon continuum states and discontinuities in the density of states on and within the continuum, which will appear as discontinuities in scattering intensity. In this note we discuss the general origins of these continuum features, and illustrate our results using the alternating Heisenberg antiferromagnetic chain and two-leg ladder as examples. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. RP Barnes, T (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. NR 28 TC 12 Z9 12 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 2003 VL 67 IS 2 AR 024412 DI 10.1103/PhysRevB.67.024412 PG 9 WC Physics, Condensed Matter SC Physics GA 644LH UT WOS:000180918900063 ER PT J AU Campbell, BJ Sinha, SK Osborn, R Rosenkranz, S Mitchell, JF Argyriou, DN Vasiliu-Doloc, L Seeck, OH Lynn, JW AF Campbell, BJ Sinha, SK Osborn, R Rosenkranz, S Mitchell, JF Argyriou, DN Vasiliu-Doloc, L Seeck, OH Lynn, JW TI Polaronic orbital polarization in a layered colossal magnetoresistive manganite SO PHYSICAL REVIEW B LA English DT Article ID T-C; CHARGE; LA1.2SR1.8MN2O7; LA1-XCAXMNO3; LASR2MN2O7; LA2-2XSR1+2XMN2O7; DISTORTIONS; MAGNETISM; ORDER AB The striking anisotropy observed in Huang scattering distributions near the intense Bragg reflections of La1.2Sr1.8Mn2O7 is shown to be the result of orbitally polarized polarons in the paramagnetic insulating state above T-C. X-ray single-crystal diffuse scattering patterns from this bilayered colossal magnetoresistive manganite are calculated in terms of the polaronic local structure and compared with experimental measurements. At 300 K, the polaronic e(g) electrons occupy "out-of-plane" (i.e., 3z(2)-r(2)) orbitals, leading to MnO6 octahedra that are Jahn-Teller elongated along the c axis, perpendicular to the perovskite layers. Between 300 K and T-C, however, the "orbital polarization" is shown to shift into the a-b plane (i.e., 3x(2)-r(2) and 3y(2)-r(2) orbitals), allowing the formation of nanoscale polaron correlations above T-C. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA. Los Alamos Natl Lab, Los Alamos Neutron Sci Ctr, Los Alamos, NM 87545 USA. Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA. RP Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Campbell, Branton/A-3990-2008; Osborn, Raymond/E-8676-2011; Rosenkranz, Stephan/E-4672-2011 OI Osborn, Raymond/0000-0001-9565-3140; Rosenkranz, Stephan/0000-0002-5659-0383 NR 26 TC 21 Z9 21 U1 0 U2 9 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 2003 VL 67 IS 2 AR 020409 DI 10.1103/PhysRevB.67.020409 PG 4 WC Physics, Condensed Matter SC Physics GA 644LH UT WOS:000180918900011 ER PT J AU Chia, EEM Van Harlingen, DJ Salamon, MB Yanoff, BD Bonalde, I Sarrao, JL AF Chia, EEM Van Harlingen, DJ Salamon, MB Yanoff, BD Bonalde, I Sarrao, JL TI Nonlocality and strong coupling in the heavy fermion superconductor CeCoIn5: A penetration depth study SO PHYSICAL REVIEW B LA English DT Article ID D-WAVE SUPERCONDUCTORS; UNCONVENTIONAL SUPERCONDUCTIVITY; TEMPERATURE-DEPENDENCE; MAGNETIC-FIELD; T-C; YBA2CU3O6.95; STATE; CONDUCTIVITY; CEIRIN5; NODES AB We report measurements of the magnetic penetration depth lambda in single crystals of CeCoIn5 down to similar to0.14 K using a tunnel-diode-based, self-inductive technique at 28 MHz. While the in-plane penetration depth tends to follow a power law, lambda(//)similar toT(3/2), the data are better described as a crossover between linear (T>T*) and quadratic (T fcc volume collapse transition in Ce0.9Th0.1 at ambient pressure SO PHYSICAL REVIEW B LA English DT Article ID ALPHA-GAMMA-TRANSITION; INELASTIC NEUTRON-SCATTERING; VIBRATIONAL ENTROPY; DISORDERED NI3AL; SPIN DYNAMICS; CE; STATES; CERIUM; PHASE; DENSITIES AB Phonon densities of states (DOS) were obtained from inelastic neutron scattering measurements on Ce0.9Th0.1 at temperatures from 10 to 300 K. The alpha phase showed a significant softening of its phonon DOS when heated from 10 to 140 K. Despite the 17% volume collapse, the phonon DOS showed little change between the gamma phase at 150 K and the alpha phase at 140 K. This is supported by analysis of the magnetic spectra showing that most of the transition entropy can be accounted for with the crystal field and changes in the ground-state spin fluctuations. We argue that the anomalous behavior of the phonon DOS originates with the volume dependence of the ground-state spin fluctuations. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. CALTECH, Pasadena, CA 91125 USA. Argonne Natl Lab, Argonne, IL 60439 USA. RP Manley, ME (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Osborn, Raymond/E-8676-2011; Cooley, Jason/E-4163-2013; Manley, Michael/N-4334-2015 OI Osborn, Raymond/0000-0001-9565-3140; NR 29 TC 32 Z9 33 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 2003 VL 67 IS 1 AR 014103 DI 10.1103/PhysRevB.67.014103 PG 5 WC Physics, Condensed Matter SC Physics GA 642XH UT WOS:000180830400025 ER PT J AU Marchesini, S Fadley, CS AF Marchesini, S Fadley, CS TI X-ray fluorescence holography: Going beyond the diffraction limit SO PHYSICAL REVIEW B LA English DT Article ID RESOLUTION; ATOMS AB X-ray fluorescence holography (XFH) is a method for obtaining diffraction-limited images of the local atomic structure around a given type of emitter. The reconstructed wave field represents a distorted image of the scatterer electron-density distribution, i.e., it is a convolution of the charge-density distribution with a point spread function characteristic of the measurement. We here consider several methods for the iterative deconvolution of such XFH holograms, and via theoretical simulations evaluate them from the point of view of going beyond the diffraction limit so as to image the electron charge density. Promising results for future applications are found for certain methods, and other possible image-enhancement techniques are also discussed. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. RP Marchesini, S (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RI Marchesini, Stefano/A-6795-2009 NR 22 TC 17 Z9 17 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 2003 VL 67 IS 2 AR 024115 DI 10.1103/PhysRevB.67.024115 PG 7 WC Physics, Condensed Matter SC Physics GA 644LH UT WOS:000180918900041 ER PT J AU Martin, I AF Martin, I TI Spin-drift transport and its applications SO PHYSICAL REVIEW B LA English DT Article ID NUCLEAR-MAGNETIC-RESONANCE; SEMICONDUCTOR HETEROSTRUCTURE; INJECTION; ELECTRON AB We study the generation of nonequilibrium spin currents in systems with spatially inhomogeneous magnetic potentials. For sufficiently high current densities, the spin polarization can be transported over distances significantly exceeding the intrinsic spin-diffusion length. This enables applications that would be impossible within the conventional spin-diffusion regime. Specifically, we propose dc measurement schemes for the carrier spin-relaxation times, T-1 and T-2, as well as demonstrate the possibility of spin species separation by driving current through a region with an inhomogeneous magnetic potential. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. NR 26 TC 22 Z9 22 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 2003 VL 67 IS 1 AR 014421 DI 10.1103/PhysRevB.67.014421 PG 5 WC Physics, Condensed Matter SC Physics GA 642XH UT WOS:000180830400066 ER PT J AU Martinez-Samper, P Suderow, H Vieira, S Brison, JP Luchier, N Lejay, P Canfield, PC AF Martinez-Samper, P Suderow, H Vieira, S Brison, JP Luchier, N Lejay, P Canfield, PC TI Phonon-mediated anisotropic superconductivity in the Y and Lu nickel borocarbides SO PHYSICAL REVIEW B LA English DT Article ID SCANNING-TUNNELING-MICROSCOPY; GAP RENORMALIZATION; LATTICE TRANSITION; BORIDE CARBIDE; LUNI2B2C; YNI2B2C; SPECTROSCOPY; RNI(2)B(2)C; VORTEX; STATE AB We present scanning tunneling spectroscopy and microscopy measurements at low temperatures in the borocarbide materials RNi2B2C (R=Y, Lu). The characteristic strong-coupling structure due to the pairing interaction is unambiguously resolved in the superconducting density of states. It is located at the superconducting gap plus the energy corresponding to a phonon mode identified in previous neutron-scattering experiments. These measurements also show that this mode is coupled to the electrons through a highly anisotropic electron-phonon interaction originated by a nesting feature of the Fermi surface. Our experiments, from which we can extract a large electron-phonon coupling parameter lambda (between 0.5 and 0.8), demonstrate that this anisotropic electron-phonon coupling has an essential contribution to the pairing interaction. The tunneling spectra show an anisotropic s-wave superconducting gap function. C1 Univ Autonoma Madrid, Fac Ciencias, Dept Fis Mat Condensada, Inst Ciencia Mat Nicolas Cabrera,Lab Bajas Temp, E-28049 Madrid, Spain. CNRS, Ctr Rech Tres Basses Temp, F-38042 Grenoble 9, France. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. RP Martinez-Samper, P (reprint author), Univ Autonoma Madrid, Fac Ciencias, Dept Fis Mat Condensada, Inst Ciencia Mat Nicolas Cabrera,Lab Bajas Temp, E-28049 Madrid, Spain. RI Suderow, Hermann/L-6612-2013; Canfield, Paul/H-2698-2014; vieira, sebastian/L-5216-2014 OI Suderow, Hermann/0000-0002-5902-1880; vieira, sebastian/0000-0002-3854-1377 NR 46 TC 43 Z9 43 U1 0 U2 7 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 2003 VL 67 IS 1 AR 014526 DI 10.1103/PhysRevB.67.014526 PG 5 WC Physics, Condensed Matter SC Physics GA 642XH UT WOS:000180830400096 ER PT J AU Nersesyan, AA Tsvelik, AM AF Nersesyan, AA Tsvelik, AM TI Spinons in more than one dimension: Resonance valence bond state stabilized by frustration SO PHYSICAL REVIEW B LA English DT Article ID EXACT FORM-FACTORS; HIGH-TEMPERATURE SUPERCONDUCTIVITY; QUANTUM-FIELD THEORIES; SINE-GORDON MODEL; GAUGE-THEORY; OPERATOR ALGEBRA; CHAIN; ANTIFERROMAGNETS; LADDERS; SYSTEMS AB For two spatially anisotropic, SU(2)-invariant models of frustrated magnets in arbitrary space dimension we present a nonperturbative proof of the existence of neutral spin-1/2 excitations (spinons). In one model the frustration is static and based on fine tuning of the coupling constants, whereas in the other it is dynamic and does not require adjusting of the model parameters. For both models we derive a low-energy effective action that does not contain any constraints. Though our models admit the standard gauge theory treatment, we follow an alternative approach based on Abelian and non-Abelian bosonization. We prove the existence of propagating spin-1/2 excitations (spinons) and consider in detail certain exactly solvable limits. A qualitative discussion of the most general case is also presented. C1 Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Abdus Salam Int Ctr Theoret Phys, Strada Costiera 11, I-34100 Trieste, Italy. NR 69 TC 69 Z9 71 U1 1 U2 5 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9950 EI 2469-9969 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 2003 VL 67 IS 2 AR 024422 DI 10.1103/PhysRevB.67.024422 PG 19 WC Physics, Condensed Matter SC Physics GA 644LH UT WOS:000180918900073 ER PT J AU Nicholson, DMC Brown, RH AF Nicholson, DMC Brown, RH TI Comment on "Fe magnon dispersion curve calculated with the frozen spin-wave method" SO PHYSICAL REVIEW B LA English DT Editorial Material ID FINITE-TEMPERATURE; DYNAMICS; CO; NI AB In a recent paper, Bylander [Phys. Rev. B 61, 11 875 (2000)] present a calculated magnon dispersion of Fe in the [100] direction. Their results are compared to experiment and to similar calculations by Gebaur and Baroni [Phys. Rev. B 61, 6459 (2000)]. They also refer to the results of Brown, Nicholson, Wang, and Schulthess (BNWS) [J. Appl. Phys. 85, 4830 (1999)] but claim that BNWS's results are unclear because of the use of the frozen potential approximation (FPA) for a second-order effect. They assert that this use of the FPA results from commonly held misinterpretations of this approximation and devote an appendix to its derivation. We disagree and in this comment we demonstrate that the FPA is a valid tool for the calculation of magnon dispersion. C1 Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA. Luther Coll, Dept Phys, Decorah, IA 52101 USA. RP Oak Ridge Natl Lab, Div Math & Comp Sci, POB 2008, Oak Ridge, TN 37831 USA. NR 15 TC 2 Z9 2 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 EI 1550-235X J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 2003 VL 67 IS 1 AR 016401 DI 10.1103/PhysRevB.67.016401 PG 4 WC Physics, Condensed Matter SC Physics GA 642XH UT WOS:000180830400105 ER PT J AU Nicklas, M Sidorov, VA Borges, HA Pagliuso, PG Petrovic, C Fisk, Z Sarrao, JL Thompson, JD AF Nicklas, M Sidorov, VA Borges, HA Pagliuso, PG Petrovic, C Fisk, Z Sarrao, JL Thompson, JD TI Magnetism and superconductivity in Ce2RhIn8 SO PHYSICAL REVIEW B LA English DT Article ID HEAVY-FERMION COMPOUNDS; MEDIATED SUPERCONDUCTIVITY; PRESSURE; CERHIN5; ANTIFERROMAGNETISM; TEMPERATURE; UPD2AL3; SYSTEMS; METALS AB We report the discovery of pressure-induced superconductivity, with T-c=2 K, in the heavy-fermion antiferromagnet Ce2RhIn8, where superconductivity and magnetic order coexist over an extended pressure interval. A T-linear resistivity in the normal state, accessed by an applied magnetic field, does not appear to derive from the existence of a two-dimensional quantum-critical spin-density wave. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Russian Acad Sci, Inst High Pressure Phys, Troitsk, Russia. Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22453 Rio De Janeiro, Brazil. Brookhaven Natl Lab, Upton, NY 11973 USA. Florida State Univ, NHMFL, Tallahassee, FL 32306 USA. RP Nicklas, M (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Petrovic, Cedomir/A-8789-2009; Pagliuso, Pascoal/C-9169-2012; Nicklas, Michael/B-6344-2008 OI Petrovic, Cedomir/0000-0001-6063-1881; Nicklas, Michael/0000-0001-6272-2162 NR 32 TC 62 Z9 62 U1 0 U2 13 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 2003 VL 67 IS 2 AR 020506 DI 10.1103/PhysRevB.67.020506 PG 4 WC Physics, Condensed Matter SC Physics GA 644LH UT WOS:000180918900021 ER PT J AU Ren, Y Nugroho, AA Menovsky, AA Strempfer, J Rutt, U Iga, F Takabatake, T Kimball, CW AF Ren, Y Nugroho, AA Menovsky, AA Strempfer, J Rutt, U Iga, F Takabatake, T Kimball, CW TI Orbital-ordering-induced phase transition in LaVO3 and CeVO3 SO PHYSICAL REVIEW B LA English DT Article ID MAGNETIC-PROPERTIES; YVO3; CRYSTAL; LAMNO3; YTIO3 AB The structural phase transition in the orthovanadates LaVO3 and CeVO3 has been studied with high energy synchrotron x-ray diffraction. LaVO3 undergoes a second order phase transition at T-N=143 K and a first order transition at T-t=141 K, while in CeVO3 there are phase transitions occurring at T-0=154 K of second order and at T-N=134 K of first order. These phase transitions are confirmed by specific heat measurements. The phase transition at T-t in LaVO3 or T-0 in CeVO3 is due to a G-type orbital ordering which lowers the structure symmetry from orthorhombic Pbnm to monoclinic P2(1)/b11. The structure change at T-N in CeVO3 is ascribed to an orbital ordering enhanced magnetostrictive distortion, while that at T-N in LaVO3 is most probably due to an ordered occupation of the vanadium 3d t(2g) orbitals associated with an antiferromagnetic ordering. We propose that the first order phase transition at T-t in LaVO3 should be associated with a sudden change of both spin and orbital configurations, similar to the phase transition at T-s=77 K in YVO3 [Ren et al., Nature (London) 396, 441 (1998)], causing a reversal of the net magnetization. However, the ordered state above T-t in LaVO3 is identical to that below T-s in YVO3. It is found that, with increasing lanthanide ionic radius, the Neel temperature T-N increases while the orbital ordering onset temperature decreases in these orthovanadates. C1 No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. Univ Groningen, Ctr Mat Sci, Lab Solid State Chem, NL-9747 AG Groningen, Netherlands. Univ Amsterdam, VanderWaals Zeeman Inst, NL-1018 XE Amsterdam, Netherlands. Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany. Hiroshima Univ, ADSM, Dept Quantum Matter, Higashihiroshima 7398526, Japan. Jurusan Fisika, Bandung 40132, Indonesia. RP Ren, Y (reprint author), No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA. RI Nugroho, Agustinus Agung/E-5977-2010; Takabatake, Toshiro/L-2882-2014 OI Nugroho, Agustinus Agung/0000-0002-1785-4008; Takabatake, Toshiro/0000-0002-3293-8592 NR 20 TC 51 Z9 51 U1 3 U2 32 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 2003 VL 67 IS 1 AR 014107 DI 10.1103/PhysRevB.67.014107 PG 6 WC Physics, Condensed Matter SC Physics GA 642XH UT WOS:000180830400029 ER PT J AU Welp, U Rydh, A Karapetrov, G Kwok, WK Crabtree, GW Marcenat, C Paulius, L Klein, T Marcus, J Kim, KHP Jung, CU Lee, HS Kang, B Lee, SI AF Welp, U Rydh, A Karapetrov, G Kwok, WK Crabtree, GW Marcenat, C Paulius, L Klein, T Marcus, J Kim, KHP Jung, CU Lee, HS Kang, B Lee, SI TI Superconducting transition and phase diagram of single-crystal MgB2 SO PHYSICAL REVIEW B LA English DT Article ID UPPER CRITICAL-FIELD; MAGNETIZATION DATA; VORTEX LATTICE; ANISOTROPY; LUNI2B2C; YNI2B2C; GAPS; FILMS AB The superconducting phase diagram of MgB2 was determined from magnetization, magnetotransport, and single-crystal specific-heat measurements. A zero-temperature in-plane coherence length of 9.4 nm is determined. The superconducting anisotropy gamma increases from a value around 2 near T-c to above 4.5 at 22 K. For Hparallel toc a pronounced peak effect in the critical current occurs at the upper critical field. Evidence for a surface superconducting state is presented for Hparallel toc that might account for the widespread in reported values of gamma. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. CEA Grenoble, Dept Rech Fondamentale Mat Condensee, Serv Phys Magnetism & Superconduct, F-38054 Grenoble, France. CNRS, Lab Etud Proprits Solides, F-38042 Grenoble, France. Pohang Univ Sci & Technol, NCRICS, Pohang 790784, South Korea. Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea. Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA. RP Welp, U (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Rydh, Andreas/A-7068-2012; Karapetrov, Goran/C-2840-2008 OI Rydh, Andreas/0000-0001-6641-4861; Karapetrov, Goran/0000-0003-1113-0137 NR 45 TC 76 Z9 77 U1 0 U2 9 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 2003 VL 67 IS 1 AR 012505 DI 10.1103/PhysRevB.67.012505 PG 4 WC Physics, Condensed Matter SC Physics GA 642XH UT WOS:000180830400021 ER PT J AU Werner, R Emery, VJ AF Werner, R Emery, VJ TI Low-temperature electronic properties of Sr2RuO4. I. Microscopic model and normal-state properties SO PHYSICAL REVIEW B LA English DT Article ID TRIPLET SUPERCONDUCTOR SR2RUO4; FERMI-SURFACE; HEISENBERG-ANTIFERROMAGNET; LAYERED PEROVSKITE; SPIN; CHAINS; FIELD; HEAT; GAP; TOPOGRAPHY AB Starting from the quasi-one-dimensional kinetic energy of the d(yz) and d(zx) bands we derive a bosonized description of the correlated electron system in Sr2RuO4. At intermediate coupling the magnetic correlations have a quasi-one-dimensional component along the diagonals of the basal plane of the tetragonal unit cell that accounts for the observed neutron scattering results. Together with two-dimensional correlations the model consistently accounts for the normal phase specific heat, cyclotron mass enhancement, static susceptibility, and Wilson ratio and implies an anomalous high-temperature resistivity. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Werner, R (reprint author), Univ Karlsruhe, Inst Theorie Kondensierten Mat, Kaiserstr 12, D-76128 Karlsruhe, Germany. NR 76 TC 3 Z9 3 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 2003 VL 67 IS 1 AR 014504 DI 10.1103/PhysRevB.67.014504 PG 12 WC Physics, Condensed Matter SC Physics GA 642XH UT WOS:000180830400074 ER PT J AU Werner, R AF Werner, R TI Low-temperature electronic properties of Sr2RuO4. II. Superconductivity SO PHYSICAL REVIEW B LA English DT Article ID ORBITAL-DEPENDENT SUPERCONDUCTIVITY; SPIN-TRIPLET SUPERCONDUCTIVITY; SINE-GORDON MODEL; LAYERED PEROVSKITE; FERMI-SURFACE; THERMAL-CONDUCTIVITY; PEIERLS TRANSITION; HUBBARD-MODEL; ANISOTROPY; GAP AB The body centered tetragonal structure of Sr2RuO4 gives rise to umklapp scattering enhanced interplane pair correlations in the d(yz) and d(zx) orbitals. Based on symmetry arguments, Hund's rule coupling, and a bosonized description of the in-plane electron correlations the superconducting order parameter is found to be a orbital-singlet spin-triplet with two spatial components. The spatial anisotropy is 7%. The different components of the order parameter give rise to two-dimensional gapless fluctuations. The phase transition is of third order. The temperature dependence of the pair density, specific heat, nuclear quadrupole resonance, Knight shift, and susceptibility are in agreement with experimental results. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Univ Karlsruhe, Inst Theorie Kondensierten Mat, D-76128 Karlsruhe, Germany. RP Werner, R (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. NR 110 TC 11 Z9 11 U1 1 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 2003 VL 67 IS 1 AR 014505 DI 10.1103/PhysRevB.67.014505 PG 19 WC Physics, Condensed Matter SC Physics GA 642XH UT WOS:000180830400075 ER PT J AU Werner, R AF Werner, R TI Low-temperature electronic properties of Sr2RuO4. III. Magnetic fields SO PHYSICAL REVIEW B LA English DT Article ID TRIPLET SUPERCONDUCTOR SR2RUO4; LAYERED PEROVSKITE; INPLANE ANISOTROPY; HEAT; CONDUCTIVITY; STATE; GAP AB Based on the microscopic model introduced previously the observed specific heat and ac-susceptibility data in the superconducting phase in Sr2RuO4 with applied magnetic fields are described consistently within a phenomenological approach. Discussed in detail are the temperature dependence of the upper critical fields H-c2 and H-2, the dependence of the upper critical fields on the field direction, the linear specific heat below the superconducting phase transition as a function of field or temperature, the anisotropy of the two spatial components of the order parameter, and the fluctuation field H-p. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Univ Karlsruhe, Inst Theorie Kondensierten Mat, D-76128 Karlsruhe, Germany. RP Werner, R (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. NR 43 TC 4 Z9 4 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD JAN 1 PY 2003 VL 67 IS 1 AR 014506 DI 10.1103/PhysRevB.67.014506 PG 8 WC Physics, Condensed Matter SC Physics GA 642XH UT WOS:000180830400076 ER PT J AU Afnan, IR Gibson, BF AF Afnan, IR Gibson, BF TI Lambda-Lambda interaction and He-6(Lambda Lambda) SO PHYSICAL REVIEW C LA English DT Article ID DOUBLE HYPERNUCLEUS AB A one-boson exchange (OBE) potential model, based on the Nijmegen model D potential, for the S-1(0), S= -2 interaction is analyzed with emphasis on the role of coupling between the LambdaLambda, NXi, and SigmaSigma channels. Singlet scalar exchange, an approximation to two-pion exchange, is significant in all channels; surprisingly, the one-pion exchange component is almost negligible. The size of the channel coupling as a function of the overall strength of the OBE model potential is examined. Implications of the analysis for the binding energy of (LambdaLambda) He-6 are considered; the new experimental datum may suggest a consistency between the extracted LambdaLambda matrix element and the relation implied by SU(3) among OBE baryon-baryon interactions. C1 Flinders Univ S Australia, Sch Chem Phys & Earth Sci, Adelaide, SA 5001, Australia. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Afnan, IR (reprint author), Flinders Univ S Australia, Sch Chem Phys & Earth Sci, GPO Box 2100, Adelaide, SA 5001, Australia. NR 14 TC 24 Z9 24 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 2003 VL 67 IS 1 AR 017001 DI 10.1103/PhysRevC.67.017001 PG 4 WC Physics, Nuclear SC Physics GA 644WL UT WOS:000180943300071 ER PT J AU Aggarwal, MM Angelis, ALS Antonenko, V Arefiev, V Astakhov, V Avdeitchikov, V Awes, TC Baba, PVKS Badyal, SK Bathe, S Batiounia, B Bernier, T Bhalla, KB Bhatia, VS Blume, C Bucher, D Busching, H Carlen, L Chattopadhyay, S Decowski, MP Delagrange, H Donni, P Majumdar, MRD El Chenawi, K Enosawa, K Fokin, S Frolov, V Ganti, MS Garpman, S Gavrishchuk, O Geurts, FJM Ghosh, TK Glasow, R Guskov, B Gustafsson, HA Gutbrod, HH Hrivnacova, I Ippolitov, M Kalechofsky, H Kamermans, R Karadjev, K Karpio, K Kolb, BW Kosarev, I Koutcheryaev, I Kugler, A Kulinich, P Kurata, M Lebedev, A Lohner, H Mahapatra, DP Manko, V Martin, M Martinez, G Maximov, A Miake, Y Mishra, GC Mohanty, B Mora, MJ Morrison, D Mukhanova, T Mukhopadhyay, DS Naef, H Nandi, BK Nayak, SK Nayak, TK Nianine, A Nikitine, V Nikolaev, S Nilsson, P Nishimura, S Nomokonov, P Nystrand, J Oskarsson, A Otterlund, I Peitzmann, T Peressounko, D Petracek, V Plasil, F Purschke, ML Rak, J Raniwala, R Raniwala, S Rao, NK Reygers, K Roland, G Rosselet, L Roufanov, I Rubio, JM Sambyal, SS Santo, R Sato, S Schlagheck, H Schmidt, HR Schutz, Y Shabratova, G Shah, TH Sibiriak, I Siemiarczuk, T Silvermyr, D Sinha, BC Slavine, N Soderstrom, K Sood, G Sorensen, SP Stankus, P Stefanek, G Steinberg, P Stenlund, E Sumbera, M Svensson, T Tsvetkov, A Tykarski, L v d Pijll, EC v Eijndhoven, N v Nieuwenhuizen, GJ Vinogradov, A Viyogi, YP Vodopianov, A Voros, S Wyslouch, B Young, GR AF Aggarwal, MM Angelis, ALS Antonenko, V Arefiev, V Astakhov, V Avdeitchikov, V Awes, TC Baba, PVKS Badyal, SK Bathe, S Batiounia, B Bernier, T Bhalla, KB Bhatia, VS Blume, C Bucher, D Busching, H Carlen, L Chattopadhyay, S Decowski, MP Delagrange, H Donni, P Majumdar, MRD El Chenawi, K Enosawa, K Fokin, S Frolov, V Ganti, MS Garpman, S Gavrishchuk, O Geurts, FJM Ghosh, TK Glasow, R Guskov, B Gustafsson, HA Gutbrod, HH Hrivnacova, I Ippolitov, M Kalechofsky, H Kamermans, R Karadjev, K Karpio, K Kolb, BW Kosarev, I Koutcheryaev, I Kugler, A Kulinich, P Kurata, M Lebedev, A Lohner, H Mahapatra, DP Manko, V Martin, M Martinez, G Maximov, A Miake, Y Mishra, GC Mohanty, B Mora, MJ Morrison, D Mukhanova, T Mukhopadhyay, DS Naef, H Nandi, BK Nayak, SK Nayak, TK Nianine, A Nikitine, V Nikolaev, S Nilsson, P Nishimura, S Nomokonov, P Nystrand, J Oskarsson, A Otterlund, I Peitzmann, T Peressounko, D Petracek, V Plasil, F Purschke, ML Rak, J Raniwala, R Raniwala, S Rao, NK Reygers, K Roland, G Rosselet, L Roufanov, I Rubio, JM Sambyal, SS Santo, R Sato, S Schlagheck, H Schmidt, HR Schutz, Y Shabratova, G Shah, TH Sibiriak, I Siemiarczuk, T Silvermyr, D Sinha, BC Slavine, N Soderstrom, K Sood, G Sorensen, SP Stankus, P Stefanek, G Steinberg, P Stenlund, E Sumbera, M Svensson, T Tsvetkov, A Tykarski, L v d Pijll, EC v Eijndhoven, N v Nieuwenhuizen, GJ Vinogradov, A Viyogi, YP Vodopianov, A Voros, S Wyslouch, B Young, GR TI One-, two-, and three-particle distributions from 158A GeV/c central Pb+Pb collisions SO PHYSICAL REVIEW C LA English DT Article ID HEAVY-ION COLLISIONS; MULTISTEP AVALANCHE CHAMBER; TWISS CORRELATION RADII; PHASE-SPACE DENSITY; PLUS PB COLLISIONS; 2-PION CORRELATIONS; 3-PION INTERFEROMETRY; PION INTERFEROMETRY; NUCLEAR COLLISIONS; NEUTRAL PIONS AB Several hadronic observables have been studied in central 158A GeV Pb+Pb collisions using data measured by the WA98 experiment at CERN: single pi(-) and K- production, as well as two- and three-pion interferometry. The Wiedemann-Heinz hydrodynamical model has been fitted to the pion spectrum, giving an estimate of the temperature and transverse flow velocity. Bose-Einstein correlations between two identified pi(-) have been analyzed as a function of k(T), using two different parametrizations. The results indicate that the source does not have a strictly boost invariant expansion or spend time in a long-lived intermediate phase. A comparison between data and a hydrodynamical based simulation shows very good agreement for the radii parameters as a function of k(T). The pion phase-space density at freeze-out has been measured, and agrees well with the Tomasik-Heinz model. A large pion chemical potential close to the condensation limit of m(pi) seems to be excluded. The three-pion Bose-Einstein interferometry shows a substantial contribution of the genuine three-pion correlation, but not quite as large as expected for a fully chaotic and symmetric source. C1 Panjab Univ, Chandigarh 160014, India. Univ Rajasthan, Jaipur 302004, Rajasthan, India. Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Kolkata 700064, W Bengal, India. Univ Geneva, CH-1211 Geneva 4, Switzerland. RRC Kurchatov Inst, RU-123182 Moscow, Russia. Joint Inst Nucl Res, RU-141980 Dubna, Russia. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Jammu, Jammu 180001, India. Univ Munster, D-48149 Munster, Germany. Ecole Mines, SUBATECH, Nantes, France. Gesell Schwerionenforsch GSI, D-64220 Darmstadt, Germany. Univ Utrecht, NIKHEF, NL-3508 TA Utrecht, Netherlands. Lund Univ, SE-22100 Lund, Sweden. Nucl Res Inst, CZ-25068 Rez, Czech Republic. Univ Groningen, KVI, NL-9747 AA Groningen, Netherlands. Inst Nucl Studies, PL-00681 Warsaw, Poland. MIT, Cambridge, MA 02139 USA. Inst Phys, Bhubaneswar 751005, Orissa, India. Univ Tennessee, Knoxville, TN 37966 USA. RP Panjab Univ, Chandigarh 160014, India. RI Sumbera, Michal/O-7497-2014; Decowski, Patrick/A-4341-2011; Peitzmann, Thomas/K-2206-2012; Lohner, Herbert/B-2397-2014 OI Sumbera, Michal/0000-0002-0639-7323; Peitzmann, Thomas/0000-0002-7116-899X; Lohner, Herbert/0000-0002-7441-739X NR 49 TC 23 Z9 24 U1 0 U2 2 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 2003 VL 67 IS 1 AR 014906 DI 10.1103/PhysRevC.67.014906 PG 13 WC Physics, Nuclear SC Physics GA 644WL UT WOS:000180943300051 ER PT J AU Baranger, M Strayer, M Wu, JS AF Baranger, M Strayer, M Wu, JS TI Nuclear collective motion with full nonlinearity SO PHYSICAL REVIEW C LA English DT Article ID PERIODIC TRAJECTORIES AB The periodic solutions previously considered for nuclear time-dependent Hartree-Fock problems are recalculated by a new method which is more accurate and reliable. It starts from a first guess of the entire periodic trajectory, instead of a first guess of the initial state. An exact solution of the discretized nonlinear equations is then obtained in three to five iterations involving, once again, the entire trajectory. The resulting families of solutions, and in particular the relationship between the period and the energy, are much more complicated than previously thought. The meaning of this outcome is discussed. C1 MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA. MIT, Nucl Sci Lab, Cambridge, MA 02139 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Fayetteville State Univ, Dept Nat Sci, Fayetteville, NC 28301 USA. RP Baranger, M (reprint author), MIT, Ctr Theoret Phys, Cambridge, MA 02139 USA. NR 13 TC 0 Z9 0 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 2003 VL 67 IS 1 AR 014318 DI 10.1103/PhysRevC.67.014318 PG 12 WC Physics, Nuclear SC Physics GA 644WL UT WOS:000180943300027 ER PT J AU Danchev, M Hartley, DJ Kondev, FG Carpenter, MP Janssens, RVF Riedinger, LL Abu Saleem, KH Ahmad, I Amro, H Balabanski, DL Cizewski, JA Davids, CN Heinz, A Khoo, TL Lauritsen, T Lister, CJ Ma, WC Poli, GL Ressler, J Reviol, W Smith, MB Seweryniak, D Wiedenhover, I AF Danchev, M Hartley, DJ Kondev, FG Carpenter, MP Janssens, RVF Riedinger, LL Abu Saleem, KH Ahmad, I Amro, H Balabanski, DL Cizewski, JA Davids, CN Heinz, A Khoo, TL Lauritsen, T Lister, CJ Ma, WC Poli, GL Ressler, J Reviol, W Smith, MB Seweryniak, D Wiedenhover, I TI In-beam gamma-ray spectroscopy of Pt-172 SO PHYSICAL REVIEW C LA English DT Article ID HIGH-SPIN STATES; QUASI-PARTICLE EXCITATIONS; NEUTRON-DEFICIENT HG; PROTON DRIP-LINE; SHAPE COEXISTENCE; EXCITED-STATES; NONYRAST STATES; INTRUDER BANDS; MASS NUCLEI; ISOTOPES AB Collective structures in Pt-172 have been investigated by measuring in-beam gamma rays with mass selection and the recoil-decay tagging technique. The discrepancy in the ground-state band from previous studies has been resolved, and a new collective structure that is likely based on an octupole vibration has been identified. A band mixing model is used to determine the properties of the competing near-spherical and deformed ground-state sequences in the light Os-Pt-Hg-Pb region. Evidence for a reduction of deformation in the deformed vacuum structure below N=98 is presented. C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Argonne Natl Lab, Technol Dev Div, Argonne, IL 60439 USA. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Mississippi State Univ, Dept Phys, Mississippi State, MS 39762 USA. Rutgers State Univ, Dept Phys & Astron, New Brunswick, NJ 08903 USA. Washington Univ, Dept Chem, St Louis, MO 63130 USA. St Kliment Ohridski Univ Sofia, Fac Phys, BG-1164 Sofia, Bulgaria. RP Danchev, M (reprint author), Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. RI Ressler, Jennifer Jo/F-2279-2010; Heinz, Andreas/E-3191-2014; Carpenter, Michael/E-4287-2015 OI Carpenter, Michael/0000-0002-3237-5734 NR 40 TC 5 Z9 5 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 2003 VL 67 IS 1 AR 014312 DI 10.1103/PhysRevC.67.014312 PG 7 WC Physics, Nuclear SC Physics GA 644WL UT WOS:000180943300021 ER PT J AU Davids, B van den Berg, AM Dendooven, P Fleurot, F Hunyadi, M de Huu, MA Rehm, KE Segel, RE Siemssen, RH Wilschut, HW Wortche, HJ Wuosmaa, AH AF Davids, B van den Berg, AM Dendooven, P Fleurot, F Hunyadi, M de Huu, MA Rehm, KE Segel, RE Siemssen, RH Wilschut, HW Wortche, HJ Wuosmaa, AH TI alpha-decay branching ratios of near-threshold states in Ne-19 and the astrophysical rate of O-15(alpha,gamma)Ne-19 SO PHYSICAL REVIEW C LA English DT Article ID CLASSICAL NOVAE; WHITE-DWARFS; RP PROCESS; NUCLEOSYNTHESIS; N-15(ALPHA,GAMMA)F-19; STRENGTHS; ELEMENTS AB The O-15(alpha,gamma)Ne-19 reaction is one of two routes for breakout from the hot CNO cycles into the rp process in accreting neutron stars. Its astrophysical rate depends critically on the decay properties of excited states in Ne-19 lying just above the O-15+alpha threshold. We have measured the alpha-decay branching ratios for these states using the p(Ne-21,t)Ne-19 reaction at 43 MeV/nucleon. Combining our measurements with previous determinations of the radiative widths of these states, we conclude that no significant breakout from the hot CNO cycle into the rp process in novas is possible via O-15(alpha,gamma)Ne-19, assuming that current models accurately represent their temperature and density conditions. C1 Kernfys Versneller Inst, NL-9747 AA Groningen, Netherlands. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Northwestern Univ, Dept Phys, Evanston, IL 60208 USA. RP Davids, B (reprint author), Kernfys Versneller Inst, Zernikelaan 25, NL-9747 AA Groningen, Netherlands. RI van den Berg, Adriaan/P-6792-2015 NR 33 TC 15 Z9 15 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 2003 VL 67 IS 1 AR 012801 DI 10.1103/PhysRevC.67.012801 PG 4 WC Physics, Nuclear SC Physics GA 644WL UT WOS:000180943300007 ER PT J AU Doring, J Kaye, RA Aprahamian, A Cooper, MW Daly, J Davids, CN de Haan, RC Gorres, J Lesher, SR Ressler, JJ Seweryniak, D Stech, EJ Susalla, A Tabor, SL Uusitalo, J Walters, WB Wiescher, M AF Doring, J Kaye, RA Aprahamian, A Cooper, MW Daly, J Davids, CN de Haan, RC Gorres, J Lesher, SR Ressler, JJ Seweryniak, D Stech, EJ Susalla, A Tabor, SL Uusitalo, J Walters, WB Wiescher, M TI Rotational and vibrational excitations in Zr-84 studied through in-beam and Nb-84 beta-decay spectroscopy SO PHYSICAL REVIEW C LA English DT Article ID HIGH-SPIN STATES; TRANSITION STRENGTHS; BAND CROSSINGS; T-Z=1 NUCLEI; Y-83; COLLECTIVITY; EVOLUTION; KR-80; LINE AB Low- and medium-spin states have been investigated in the even-even nucleus Zr-84 by using in-beam gamma-ray spectroscopy via the reactions Co-59(Si-28,p2n) and Ni-58(S-32,alpha2p) at beam energies of 99 and 135 MeV, respectively. Several new levels have been identified, including a new even-spin sequence of the gamma-vibrational band. The previously known sequence has been found to be built on a 3(+) state at 1575.3 keV representing the odd-spin sequence. In addition, the beta(+)/EC decay of mass-separated Nb-84 sources has been studied by beta- and gamma-ray spectroscopy following the bombardment of a thin Ni-58 target with Si-28 ions at 94 MeV. Some low-lying daughter states up to spin and parity of 4(+) have been identified in Zr-84, and a half-life of 9.5+/-1.0 s has been measured for the Nb-84 ground-state decay. The systematics of gamma-vibrational states in even-even Zr nuclei and a comparison with model predictions indicate increasing gamma softness and triaxiality as the spherical neutron shell closure at N=50 is approached. Using an empirical estimate, a triaxiality of about 25degrees has been extracted for Zr-84. Furthermore, a negative-parity structure of 4(-) and 6(-) states which is similar to other N=44 isotones has been identified in Zr-84 as a two-quasineutron excitation. C1 Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany. Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA. Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Univ Maryland, Dept Chem, College Pk, MD 20742 USA. RP Doring, J (reprint author), Gesell Schwerionenforsch mbH, D-64291 Darmstadt, Germany. NR 43 TC 9 Z9 9 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 2003 VL 67 IS 1 AR 014315 DI 10.1103/PhysRevC.67.014315 PG 14 WC Physics, Nuclear SC Physics GA 644WL UT WOS:000180943300024 ER PT J AU Hwang, JK Ramayya, AV Hamilton, JH Luo, YX Rasmussen, JO Beyer, CJ Gore, PM Wu, SC Lee, IY Folden, CM Fallon, P Zielinski, P Gregorich, KE Macchiavelli, AO Stoyer, MA Asztalos, SJ Ginter, TN Donangelo, R Coraggio, L Covello, A Gargano, A Itaco, N AF Hwang, JK Ramayya, AV Hamilton, JH Luo, YX Rasmussen, JO Beyer, CJ Gore, PM Wu, SC Lee, IY Folden, CM Fallon, P Zielinski, P Gregorich, KE Macchiavelli, AO Stoyer, MA Asztalos, SJ Ginter, TN Donangelo, R Coraggio, L Covello, A Gargano, A Itaco, N TI High spin states in Sr-93 SO PHYSICAL REVIEW C LA English DT Article ID REALISTIC EFFECTIVE INTERACTIONS; ISOTOPES; NUCLEI; SR-89 AB Twenty-one gamma transitions in Sr-93 were identified from gamma-gamma-gamma coincidences in the spontaneous fission of Cf-252 starting with the previously known three transitions in Sr-93. The level structure of this nucleus is interpreted in part as arising from the weak coupling of the 1d(5/2) neutron hole to the yrast states of the Sr-94 core. We have tried to give a quantitative description of the properties of Sr-93 by performing a shell-model study in which we assume that Sr-88 is a closed core. In this study we have also considered the neighboring isotopes Sr-90,Sr-92,Sr-94. The calculated spectra have been compared with the experimental data. C1 Vanderbilt Univ, Dept Phys, Nashville, TN 37235 USA. Joint Inst Heavy Ion Res, Oak Ridge, TN 37830 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. MIT, Cambridge, MA 02139 USA. Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA. Univ Fed Rio de Janeiro, Rio De Janeiro, Brazil. Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy. Ist Nazl Fis Nucl, I-80126 Naples, Italy. RP Hwang, JK (reprint author), Vanderbilt Univ, Dept Phys, Nashville, TN 37235 USA. RI Folden, Charles/F-1033-2015; Itaco, Nunzio/C-3838-2009; Coraggio, Luigi/P-4857-2015 OI Folden, Charles/0000-0002-2814-3762; Itaco, Nunzio/0000-0002-9508-2613; Coraggio, Luigi/0000-0002-4327-9107 NR 21 TC 10 Z9 10 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 2003 VL 67 IS 1 AR 014317 DI 10.1103/PhysRevC.67.014317 PG 6 WC Physics, Nuclear SC Physics GA 644WL UT WOS:000180943300026 ER PT J AU Kopeliovich, BZ Raufeisen, J Tarasov, AV Johnson, MB AF Kopeliovich, BZ Raufeisen, J Tarasov, AV Johnson, MB TI Nuclear effects in the Drell-Yan process at very high energies SO PHYSICAL REVIEW C LA English DT Article ID LEPTON-PAIR PRODUCTION; GLUON DISTRIBUTION-FUNCTIONS; DEEP-INELASTIC SCATTERING; PARTON DISTRIBUTIONS; TRANSVERSE-MOMENTUM; SMALL-X; HADRONIC COLLISIONS; QCD; DEPENDENCE; SATURATION AB We study Drell-Yan (DY) dilepton production in proton(deuterium)-nucleus and in nucleus-nucleus collisions within the light-cone color-dipole formalism. This approach is especially suitable for predicting nuclear effects in the DY cross section for heavy-ion collisions, as it provides the impact parameter dependence of nuclear shadowing and transverse momentum broadening, quantities that are not available from the standard parton model. For p(D) + A collisions we calculate nuclear shadowing and investigate nuclear modification of the DY transverse momentum distribution at the Relativistic Heavy Ion Collider and the Large Hadron Collider for kinematics corresponding to coherence length much longer than the nuclear size. Calculations are performed separately for transversely and longitudinally polarized DY photons, and predictions are presented for the dilepton angular distribution. Furthermore, we calculate nuclear broadening of the mean transverse momentum squared of DY dileptons as function of the nuclear mass number and energy. We also predict nuclear effects for the cross section of the DY process in heavy-ion collisions. We found a substantial nuclear shadowing for valence quarks, stronger than for the sea. C1 Max Planck Inst Kernphys, D-69029 Heidelberg, Germany. Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany. Joint Inst Nucl Res, RU-141980 Dubna, Moscow Region, Russia. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Kopeliovich, BZ (reprint author), Max Planck Inst Kernphys, Postfach 103980, D-69029 Heidelberg, Germany. NR 80 TC 53 Z9 53 U1 0 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 2003 VL 67 IS 1 AR 014903 DI 10.1103/PhysRevC.67.014903 PG 25 WC Physics, Nuclear SC Physics GA 644WL UT WOS:000180943300048 ER PT J AU Laftchiev, H Samsoen, D Quentin, P Mikhailov, IN AF Laftchiev, H Samsoen, D Quentin, P Mikhailov, IN TI Equivalence of pairing correlations and intrinsic vortical currents in rotating nuclei SO PHYSICAL REVIEW C LA English DT Article ID NO-254; STATE; BAND; REGION AB The present paper establishes a link between pairing correlations in rotating nuclei and collective vortical modes in the intrinsic frame. We show that the latter can be embodied by a simple Chandrasekhar S-type coupling between rotational and intrinsic vortical collective modes. This results from a comparison between the solutions of microscopic calculations within the Hartree-Fock-Bogoliubov (HFB) and HF Routhian formalisms. The HF Routhian solutions are constrained to have the same Kelvin circulation expectation value as the HFB ones. It is shown in several mass regions, pairing regimes, and for various spin values that this procedure yields moments of inertia, angular velocities, and current distributions which are very similar within both formalisms. We finally present perspectives for further studies. C1 CEN Bordeaux Gradignan, CNRS, IN2P3, F-33175 Gradignan, France. Univ Bordeaux 1, F-33175 Gradignan, France. Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, BU-1784 Sofia, Bulgaria. Los Alamos Natl Lab, Div Theoret, T DO, Los Alamos, NM 87545 USA. Joint Inst Nucl Res, Bogoliubov Lab Theoret Phys, RU-141980 Dubna, Moscow Region, Russia. Ctr Spectrometrie Nucl & Spectrometrie Masse, CNRS, IN2P3, F-91406 Orsay, France. Univ Paris 11, F-91406 Orsay, France. RP Laftchiev, H (reprint author), CEN Bordeaux Gradignan, CNRS, IN2P3, Haut Vigneau BP 120, F-33175 Gradignan, France. NR 39 TC 6 Z9 6 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 2003 VL 67 IS 1 AR 014307 DI 10.1103/PhysRevC.67.014307 PG 8 WC Physics, Nuclear SC Physics GA 644WL UT WOS:000180943300016 ER PT J AU Lynn, JE Hayes, AC AF Lynn, JE Hayes, AC TI Theoretical evaluations of the fission cross section of the 77 eV isomer of U-235 SO PHYSICAL REVIEW C LA English DT Article AB We have developed models of the fission barrier (barrier heights and transition state spectra) that reproduce reasonably well the measured fission cross section of U-235 from a neutron energy of from 1 keV to 2 MeV. From these models we have calculated the fission cross section of the 77 eV isomer of U-235 over the same energy range. We find that the ratio of the isomer cross section to that of the ground state lies between about 0.45 and 0.55 at low neutron energies. The cross sections become approximately equal above 1 MeV. The ratio of the neutron capture cross section to the fission cross section for the isomer is predicted to be about a factor of 3 larger for the isomer than for the ground state of U-235 at keV neutron energies. We have also calculated the cross section for the population of the isomer by inelastic neutron scattering from the U-235 ground state. We find that the isomer is strongly populated, and for E-n=1 MeV the (n,n' gamma) cross section leading to the population of the isomer is of the order of 0.5 b. Thus, neutron reaction network calculations involving the uranium isotopes in a high neutron fluence are likely to be affected by the 77 eV isomer of U-235. With these same models the fission cross sections of U-233 and U-237 can be reproduced approximately using only minor adjustments to the barrier heights. With the significant lowering of the outer barrier that is expected the general behavior of the fission cross section of Pu-239 can also be reproduced. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. NR 23 TC 15 Z9 15 U1 0 U2 3 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2469-9985 EI 2469-9993 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 2003 VL 67 IS 1 AR 014607 DI 10.1103/PhysRevC.67.014607 PG 10 WC Physics, Nuclear SC Physics GA 644WL UT WOS:000180943300042 ER PT J AU Moretto, LG Phair, L Wozniak, GJ AF Moretto, LG Phair, L Wozniak, GJ TI Stability of rotating heavy nuclei against fission SO PHYSICAL REVIEW C LA English DT Article ID NO-254; BAND AB A recent paper has reported the observation of the rotational band of No-254 for spins up to I=20, showing that the compound nucleus was formed and survived fission decay at angular momenta Igreater than or equal to20. We show that this survival is consistent with the leading effects of angular momentum on the fission barrier height. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Moretto, LG (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 2003 VL 67 IS 1 AR 017301 DI 10.1103/PhysRevC.67.017301 PG 2 WC Physics, Nuclear SC Physics GA 644WL UT WOS:000180943300072 ER PT J AU Xu, W Anderson, B Auberbach, L Averett, T Bertozzi, W Black, T Calarco, J Cardman, L Cates, GD Chai, ZW Chen, JP Choi, S Chudakov, E Churchwell, S Corrado, GS Crawford, C Dale, D Deur, A Djawotho, P Donnelly, TW Dutta, D Finn, JM Gao, H Gilman, R Glamazdin, AV Glashausser, C Glockle, W Golak, J Gomez, J Gorbenko, VG Hansen, JO Hersman, FW Higinbotham, DW Holmes, R Howell, CR Hughes, E Humensky, B Incerti, S de Jager, CW Jensen, JS Jiang, X Jones, CE Jones, M Kahl, R Kamada, H Kievsky, A Kominis, I Korsch, W Kramer, K Kumbartzki, G Kuss, M Lakuriqi, E Liang, M Liyanage, N LeRose, J Malov, S Margaziotis, DJ Martin, JW McCormick, K McKeown, RD McIlhany, K Meziani, ZE Michaels, R Miller, GW Mitchell, J Nanda, S Pace, E Pavlin, T Petratos, GG Pomatsalyuk, RI Pripstein, D Prout, D Ransome, RD Roblin, Y Rvachev, M Saha, A Salme, G Schnee, M Shin, T Slifer, K Souder, PA Strauch, S Suleiman, R Sutter, M Tipton, B Todor, L Viviani, M Vlahovic, B Watson, J Williamson, CF Witala, H Wojtsekhowski, B Xiong, F Yeh, J Zolnierczuk, P AF Xu, W Anderson, B Auberbach, L Averett, T Bertozzi, W Black, T Calarco, J Cardman, L Cates, GD Chai, ZW Chen, JP Choi, S Chudakov, E Churchwell, S Corrado, GS Crawford, C Dale, D Deur, A Djawotho, P Donnelly, TW Dutta, D Finn, JM Gao, H Gilman, R Glamazdin, AV Glashausser, C Glockle, W Golak, J Gomez, J Gorbenko, VG Hansen, JO Hersman, FW Higinbotham, DW Holmes, R Howell, CR Hughes, E Humensky, B Incerti, S de Jager, CW Jensen, JS Jiang, X Jones, CE Jones, M Kahl, R Kamada, H Kievsky, A Kominis, I Korsch, W Kramer, K Kumbartzki, G Kuss, M Lakuriqi, E Liang, M Liyanage, N LeRose, J Malov, S Margaziotis, DJ Martin, JW McCormick, K McKeown, RD McIlhany, K Meziani, ZE Michaels, R Miller, GW Mitchell, J Nanda, S Pace, E Pavlin, T Petratos, GG Pomatsalyuk, RI Pripstein, D Prout, D Ransome, RD Roblin, Y Rvachev, M Saha, A Salme, G Schnee, M Shin, T Slifer, K Souder, PA Strauch, S Suleiman, R Sutter, M Tipton, B Todor, L Viviani, M Vlahovic, B Watson, J Williamson, CF Witala, H Wojtsekhowski, B Xiong, F Yeh, J Zolnierczuk, P TI Plane-wave impulse approximation extraction of the neutron magnetic form factor from quasielastic (3)(He)over-right-arrow((e)over-right-arrow,e(')) at Q(2)=0.3 to 0.6 (GeV/c)(2) SO PHYSICAL REVIEW C LA English DT Article ID NUCLEON CROSS-SECTIONS; POLARIZED HE-3; ELECTRON-SCATTERING; PRECISION-MEASUREMENT; INCLUSIVE SCATTERING; TARGETS; ASYMMETRY; MODELS AB A high precision measurement of the transverse spin-dependent asymmetry A(T') in (3)(He) over right arrow((e) over right arrow ,e') quasielastic scattering was performed in Hall A at Jefferson Lab at values of the squared four-momentum transfer, Q(2), between 0.1 and 0.6 (GeV/c)(2). A(T)' is sensitive to the neutron magnetic form factor, G(M)(n). Values of G(M)(n) at Q(2)=0.1 and 0.2 (GeV/c)(2), extracted using Faddeev calculations, were reported previously. Here, we report the extraction of G(M)(n) for the remaining Q(2) values in the range from 0.3 to 0.6 (GeV/c)(2) using a plane-wave impulse approximation calculation. The results are in good agreement with recent precision data from experiments using a deuterium target. C1 MIT, Cambridge, MA 02139 USA. CALTECH, Pasadena, CA 91125 USA. Calif State Univ Los Angeles, Los Angeles, CA 90032 USA. Coll William & Mary, Williamsburg, VA 23187 USA. Duke Univ, Durham, NC 27708 USA. Ist Nazl Fis Nucl, Sez Pisa, Pisa, Italy. Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy. Ist Nazl Fis Nucl, Sez Tor Vergata, I-00133 Rome, Italy. Jagiellonian Univ, Inst Phys, PL-30059 Krakow, Poland. Kharkov Phys & Technol Inst, UA-310108 Kharkov, Ukraine. Kent State Univ, Kent, OH 44242 USA. Univ Clermont Ferrand, LPC, F-63177 Clermont Ferrand, France. N Carolina Cent Univ, Durham, NC 27707 USA. Old Dominion Univ, Norfolk, VA 23508 USA. Princeton Univ, Princeton, NJ 08544 USA. Ruhr Univ Bochum, D-44780 Bochum, Germany. Rutgers State Univ, Piscataway, NJ 08855 USA. Syracuse Univ, Syracuse, NY 13244 USA. Temple Univ, Philadelphia, PA 19122 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Univ Kentucky, Lexington, KY 40506 USA. Univ New Hampshire, Durham, NH 03824 USA. Univ Roma Tor Vergata, Dipartimento Fis, I-00173 Rome, Italy. Univ Virginia, Charlottesville, VA 22903 USA. RP Xu, W (reprint author), MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA. RI kievsky, alejandro/A-7123-2011; Kominis, Iannis/C-5515-2011; Averett, Todd/A-2969-2011; Gao, Haiyan/G-2589-2011; Kuss, Michael/H-8959-2012 NR 40 TC 75 Z9 76 U1 1 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 2003 VL 67 IS 1 AR 012201 DI 10.1103/PhysRevC.67.012201 PG 5 WC Physics, Nuclear SC Physics GA 644WL UT WOS:000180943300006 ER PT J AU Xu, XM Wong, CY Barnes, T AF Xu, XM Wong, CY Barnes, T TI Anomalous J/psi suppression and charmonium dissociation cross sections SO PHYSICAL REVIEW C LA English DT Article ID HEAVY-ION COLLISIONS; PB-PB COLLISIONS; QCD PHASE-TRANSITION; NUCLEAR COLLISIONS; HADRONIC MATTER; QUARKONIUM DISSOCIATION; SPECTRAL FUNCTIONS; TRANSVERSE ENERGY; PSI' SUPPRESSION; PB+PB COLLISIONS AB We study J/psi suppression in Pb+Pb collisions at CERN-SPS energies in hadronic matter with energy- and temperature-dependent charmonium dissociation cross sections calculated in the quark-interchange model of Barnes and Swanson. The charmonium dissociation cross sections depend sensitively on energy and increase significantly as temperature increases. We find that the variation of J/psi survival probability from peripheral to central collisions can be explained as induced by hadronic matter absorption in central collisions. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. RP Xu, XM (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. NR 71 TC 8 Z9 8 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 2003 VL 67 IS 1 AR 014907 DI 10.1103/PhysRevC.67.014907 PG 9 WC Physics, Nuclear SC Physics GA 644WL UT WOS:000180943300052 ER PT J AU Abazov, VM Abbott, B Abdesselam, A Abolins, M Abramov, V Acharya, BS Adams, DL Adams, M Ahmed, SN Alexeev, GD Alton, A Alves, GA Amidi, E Amos, N Anderson, EW Arnoud, Y Avila, C Baarmand, MM Babintsev, VV Babukhadia, L Bacon, TC Baden, A Balamurali, V Baldin, B Balm, PW Banerjee, S Bantly, J Barberis, E Baringer, P Barreto, J Bartlett, JF Bassler, U Bauer, D Bean, A Beaudette, F Begel, M Belyaev, A Beri, SB Bernardi, G Bertram, I Besson, A Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Bhattacharjee, M Blazey, G Blekman, F Blessing, S Boehnlein, A Bojko, NI Bolton, TA Borcherding, F Bos, K Bose, T Brandt, A Breedon, R Briskin, G Brock, R Brooijmans, G Bross, A Buchholz, D Buehler, M Buescher, V Burtovoi, VS Butler, JM Canelli, F Carvalho, W Casey, D Casilum, Z Castilla-Valdez, H Chakraborty, D Chan, KM Chang, SM Chekulaev, SV Cho, DK Choi, S Chopra, S Christenson, JH Chung, M Claes, D Clark, AR Cobau, WG Cochran, J Coney, L Connolly, B Cooper, WE Coppage, D Crepe-Renaudin, S Cretsinger, C Cummings, MAC Cutts, D Davis, GA De, K de Jong, SJ Demarteau, M Demina, R Demine, P Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Doulas, S Ducros, Y Dudko, LV Duensing, S Duflot, L Dugad, SR Duperrin, A Dyshkant, A Edmunds, D Ellison, J Eltzroth, JT Elvira, VD Engelmann, R Eno, S Eppley, G Ermolov, P Eroshin, OV Estrada, J Evans, H Evdokimov, VN Fahland, T Fein, D Ferbel, T Filthaut, F Fisk, HE Fisyak, Y Flattum, E Fleuret, F Fortner, M Fox, H Frame, KC Fu, S Fuess, S Gallas, E Galyaev, AN Gao, M Gavrilov, V Genik, RJ Genser, K Gerber, CE Gershtein, Y Gilmartin, R Ginther, G Gomez, B Goncharov, PI Gordon, H Goss, LT Gounder, K Goussiou, A Graf, N Grannis, PD Green, JA Greenlee, H Greenwood, ZD Grinstein, S Groer, L Grunendahl, S Gupta, A Gurzhiev, SN Gutierrez, G Gutierrez, P Hadley, NJ Haggerty, H Hagopian, S Hagopian, V Hall, RE Hansen, S Hauptman, JM Hays, C Hebert, C Hedin, D Heinmiller, JM Heinson, AP Heintz, U Hildreth, MD Hirosky, R Hobbs, JD Hoeneisen, B Huang, Y Iashvili, I Illingworth, R Ito, AS Jaffre, M Jain, S Jesik, R Johns, K Johnson, M Jonckheere, A Jones, M Jostlein, H Juste, A Kahl, W Kahn, S Kajfasz, E Kalinin, AM Karmanov, D Karmgard, D Kehoe, R Khanov, A Kharchilava, A Kim, SK Klima, B Knuteson, B Ko, W Kohli, JM Kostritskiy, AV Kotcher, J Kothari, B Kotwal, AV Kozelov, AV Kozlovsky, EA Krane, J Krishnaswamy, MR Krivkova, P Krzywdzinski, S Kubantsev, M Kuleshov, S Kulik, Y Kunori, S Kupco, A Kuznetsov, VE Landsberg, G Lee, WM Leflat, A Leggett, C Lehner, F Leonidopoulos, C Li, J Li, QZ Lima, JGR Lincoln, D Linn, SL Linnemann, J Lipton, R Lucotte, A Lueking, L Lundstedt, C Luo, C Maciel, AKA Madaras, RJ Malyshev, VL Manankov, V Mao, HS Marshall, T Martin, MI Mayorov, AA McCarthy, R McMahon, T Melanson, HL Merkin, M Merritt, KW Miao, C Miettinen, H Mihalcea, D Mishra, CS Mokhov, N Mondal, NK Montgomery, HE Moore, RW Mostafa, M da Motta, H Mutaf, Y Nagy, E Nang, F Narain, M Narasimham, VS Naumann, NA Neal, HA Negret, JP Nomerotski, A Nunnemann, T O'Neil, D Oguri, V Olivier, B Oshima, N Padley, P Pan, LJ Papageorgiou, K Parashar, N Partridge, R Parua, N Paterno, M Patwa, A Pawlik, B Peters, O Petroff, P Piegaia, R Pope, BG Popkov, E Prosper, HB Protopopescu, S Przybycien, MB Qian, J Raja, R Rajagopalan, S Ramberg, E Rapidis, PA Reay, NW Reucroft, S Ridel, M Rijssenbeek, M Rizatdinova, F Rockwell, T Roco, M Royon, C Rubinov, P Ruchti, R Rutherfoord, J Sabirov, BM Sajot, G Santoro, A Sawyer, L Schamberger, RD Schellman, H Schwartzman, A Sen, N Shabalina, E Shivpuri, RK Shpakov, D Shupe, M Sidwell, RA Simak, V Singh, H Sirotenko, V Slattery, P Smith, E Smith, RP Snihur, R Snow, GR Snow, J Snyder, S Solomon, J Song, Y Sorin, V Sosebee, M Sotnikova, N Soustruznik, K Souza, M Stanton, NR Steinbruck, G Stephens, RW Stewart, D Stoker, D Stolin, V Stone, A Stoyanova, DA Strang, MA Strauss, M Strovink, M Stutte, L Sznajder, A Talby, M Tamburello, P Taylor, W Tentindo-Repond, S Thompson, J Tripathi, SM Trippe, TG Turcot, AS Tuts, PM Vaniev, V Van Kooten, R Varelas, N Varnes, EW Vertogradov, LS Villeneuve-Seguier, F Volkov, AA Vorobiev, AP Wahl, HD Wang, H Wang, ZM Warchol, J Watts, G Wayne, M Weerts, H White, A White, JT Whiteson, D Wijngaarden, DA Willis, S Wimpenny, SJ Womersley, J Won, E Wood, DR Xu, H Xu, Q Yamada, R Yamin, P Yasuda, T Yatsunenko, YA Yip, K Yoshikawa, C Youssef, S Yu, J Zanabria, M Zhang, X Zheng, H Zhou, B Zhou, Z Zhu, ZH Zielinski, M Zieminska, D Zieminski, A Zutshi, V Zverev, EG Zylberstejn, A AF Abazov, VM Abbott, B Abdesselam, A Abolins, M Abramov, V Acharya, BS Adams, DL Adams, M Ahmed, SN Alexeev, GD Alton, A Alves, GA Amidi, E Amos, N Anderson, EW Arnoud, Y Avila, C Baarmand, MM Babintsev, VV Babukhadia, L Bacon, TC Baden, A Balamurali, V Baldin, B Balm, PW Banerjee, S Bantly, J Barberis, E Baringer, P Barreto, J Bartlett, JF Bassler, U Bauer, D Bean, A Beaudette, F Begel, M Belyaev, A Beri, SB Bernardi, G Bertram, I Besson, A Beuselinck, R Bezzubov, VA Bhat, PC Bhatnagar, V Bhattacharjee, M Blazey, G Blekman, F Blessing, S Boehnlein, A Bojko, NI Bolton, TA Borcherding, F Bos, K Bose, T Brandt, A Breedon, R Briskin, G Brock, R Brooijmans, G Bross, A Buchholz, D Buehler, M Buescher, V Burtovoi, VS Butler, JM Canelli, F Carvalho, W Casey, D Casilum, Z Castilla-Valdez, H Chakraborty, D Chan, KM Chang, SM Chekulaev, SV Cho, DK Choi, S Chopra, S Christenson, JH Chung, M Claes, D Clark, AR Cobau, WG Cochran, J Coney, L Connolly, B Cooper, WE Coppage, D Crepe-Renaudin, S Cretsinger, C Cummings, MAC Cutts, D Davis, GA De, K de Jong, SJ Demarteau, M Demina, R Demine, P Denisov, D Denisov, SP Desai, S Diehl, HT Diesburg, M Doulas, S Ducros, Y Dudko, LV Duensing, S Duflot, L Dugad, SR Duperrin, A Dyshkant, A Edmunds, D Ellison, J Eltzroth, JT Elvira, VD Engelmann, R Eno, S Eppley, G Ermolov, P Eroshin, OV Estrada, J Evans, H Evdokimov, VN Fahland, T Fein, D Ferbel, T Filthaut, F Fisk, HE Fisyak, Y Flattum, E Fleuret, F Fortner, M Fox, H Frame, KC Fu, S Fuess, S Gallas, E Galyaev, AN Gao, M Gavrilov, V Genik, RJ Genser, K Gerber, CE Gershtein, Y Gilmartin, R Ginther, G Gomez, B Goncharov, PI Gordon, H Goss, LT Gounder, K Goussiou, A Graf, N Grannis, PD Green, JA Greenlee, H Greenwood, ZD Grinstein, S Groer, L Grunendahl, S Gupta, A Gurzhiev, SN Gutierrez, G Gutierrez, P Hadley, NJ Haggerty, H Hagopian, S Hagopian, V Hall, RE Hansen, S Hauptman, JM Hays, C Hebert, C Hedin, D Heinmiller, JM Heinson, AP Heintz, U Hildreth, MD Hirosky, R Hobbs, JD Hoeneisen, B Huang, Y Iashvili, I Illingworth, R Ito, AS Jaffre, M Jain, S Jesik, R Johns, K Johnson, M Jonckheere, A Jones, M Jostlein, H Juste, A Kahl, W Kahn, S Kajfasz, E Kalinin, AM Karmanov, D Karmgard, D Kehoe, R Khanov, A Kharchilava, A Kim, SK Klima, B Knuteson, B Ko, W Kohli, JM Kostritskiy, AV Kotcher, J Kothari, B Kotwal, AV Kozelov, AV Kozlovsky, EA Krane, J Krishnaswamy, MR Krivkova, P Krzywdzinski, S Kubantsev, M Kuleshov, S Kulik, Y Kunori, S Kupco, A Kuznetsov, VE Landsberg, G Lee, WM Leflat, A Leggett, C Lehner, F Leonidopoulos, C Li, J Li, QZ Lima, JGR Lincoln, D Linn, SL Linnemann, J Lipton, R Lucotte, A Lueking, L Lundstedt, C Luo, C Maciel, AKA Madaras, RJ Malyshev, VL Manankov, V Mao, HS Marshall, T Martin, MI Mayorov, AA McCarthy, R McMahon, T Melanson, HL Merkin, M Merritt, KW Miao, C Miettinen, H Mihalcea, D Mishra, CS Mokhov, N Mondal, NK Montgomery, HE Moore, RW Mostafa, M da Motta, H Mutaf, Y Nagy, E Nang, F Narain, M Narasimham, VS Naumann, NA Neal, HA Negret, JP Nomerotski, A Nunnemann, T O'Neil, D Oguri, V Olivier, B Oshima, N Padley, P Pan, LJ Papageorgiou, K Parashar, N Partridge, R Parua, N Paterno, M Patwa, A Pawlik, B Peters, O Petroff, P Piegaia, R Pope, BG Popkov, E Prosper, HB Protopopescu, S Przybycien, MB Qian, J Raja, R Rajagopalan, S Ramberg, E Rapidis, PA Reay, NW Reucroft, S Ridel, M Rijssenbeek, M Rizatdinova, F Rockwell, T Roco, M Royon, C Rubinov, P Ruchti, R Rutherfoord, J Sabirov, BM Sajot, G Santoro, A Sawyer, L Schamberger, RD Schellman, H Schwartzman, A Sen, N Shabalina, E Shivpuri, RK Shpakov, D Shupe, M Sidwell, RA Simak, V Singh, H Sirotenko, V Slattery, P Smith, E Smith, RP Snihur, R Snow, GR Snow, J Snyder, S Solomon, J Song, Y Sorin, V Sosebee, M Sotnikova, N Soustruznik, K Souza, M Stanton, NR Steinbruck, G Stephens, RW Stewart, D Stoker, D Stolin, V Stone, A Stoyanova, DA Strang, MA Strauss, M Strovink, M Stutte, L Sznajder, A Talby, M Tamburello, P Taylor, W Tentindo-Repond, S Thompson, J Tripathi, SM Trippe, TG Turcot, AS Tuts, PM Vaniev, V Van Kooten, R Varelas, N Varnes, EW Vertogradov, LS Villeneuve-Seguier, F Volkov, AA Vorobiev, AP Wahl, HD Wang, H Wang, ZM Warchol, J Watts, G Wayne, M Weerts, H White, A White, JT Whiteson, D Wijngaarden, DA Willis, S Wimpenny, SJ Womersley, J Won, E Wood, DR Xu, H Xu, Q Yamada, R Yamin, P Yasuda, T Yatsunenko, YA Yip, K Yoshikawa, C Youssef, S Yu, J Zanabria, M Zhang, X Zheng, H Zhou, B Zhou, Z Zhu, ZH Zielinski, M Zieminska, D Zieminski, A Zutshi, V Zverev, EG Zylberstejn, A CA DO Collaboration TI t(t)over-bar production cross section in p(p)over-bar collisions at root s=1.8 TeV SO PHYSICAL REVIEW D LA English DT Review ID TOP-QUARK PRODUCTION; HEAVY-PARTICLE-PRODUCTION; W-BOSON MASS; = 1.8 TEV; HADRONIC COLLISIONS; QCD CORRECTIONS; (P)OVER-BAR-P COLLISIONS; PPBAR COLLISIONS; E+E ANNIHILATION; GLUON RADIATION AB Results are presented on a measurement of the t (t) over bar pair production cross section in p (p) over bar collisions at roots=1.8 TeV from nine independent decay channels. The data were collected by the D empty set experiment during the 1992-1996 run of the Fermilab Tevatron Collider. A total of 80 candidate events is observed with an expected background of 38.8+/-3.3 events. For a top quark mass of 172.1 GeV/c(2), the measured cross section is 5.69+/-1.21(stat)+/-1.04(syst) pb. C1 Joint Inst Nucl Res, Dubna, Russia. Univ Buenos Aires, Buenos Aires, DF, Argentina. Ctr Brasileiro Pesquisas Fis, LAFEX, Rio De Janeiro, Brazil. Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Los Andes, Bogota, Colombia. Charles Univ Prague, Ctr Particle Phys, Prague, Czech Republic. Acad Sci Czech Republic, Inst Phys, Ctr Particle Phys, Prague, Czech Republic. Univ San Francisco Quito, Quito, Ecuador. Univ Grenoble 1, CNRS, IN2P3, Inst Sci Nucl, Grenoble, France. Univ Aix Marseille 2, CNRS, IN2P3, CPPM, Marseille, France. CNRS, IN2P3, Lab Accelerateur Lineaire, F-91405 Orsay, France. Univ Paris 06, CNRS, IN2P3, LPNHE, Paris, France. Univ Paris 07, CNRS, IN2P3, LPNHE, Paris, France. CEA, Serv Phys Particles, DAPNIA, Saclay, France. Johannes Gutenberg Univ Mainz, Inst Phys, D-6500 Mainz, Germany. Panjab Univ, Chandigarh 160014, India. Univ Delhi, Delhi 110007, India. Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India. Seoul Natl Univ, Seoul, South Korea. CINVESTAV, Mexico City 14000, DF, Mexico. NIKHEF, FOM Inst, Amsterdam, Netherlands. Univ Amsterdam, NIKHEF, Amsterdam, Netherlands. Univ Nijmegen, NIKHEF, Nijmegen, Netherlands. Inst Nucl Phys, Krakow, Poland. Moscow MV Lomonosov State Univ, Moscow, Russia. Inst High Energy Phys, Protvino, Russia. Inst Theoret & Expt Phys, Moscow 117259, Russia. Univ Lancaster, Lancaster, England. Univ London Imperial Coll Sci Technol & Med, London, England. Univ Arizona, Tucson, AZ 85721 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Univ Calif Davis, Davis, CA 95616 USA. Calif State Univ Fresno, Fresno, CA 93740 USA. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Florida State Univ, Tallahassee, FL 32306 USA. Univ Hawaii, Honolulu, HI 96822 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Illinois, Chicago, IL 60607 USA. No Illinois Univ, De Kalb, IL 60115 USA. Northwestern Univ, Evanston, IL 60208 USA. Indiana Univ, Bloomington, IN 47405 USA. Univ Notre Dame, Notre Dame, IN 46556 USA. Iowa State Univ, Ames, IA 50011 USA. Univ Kansas, Lawrence, KS 66045 USA. Kansas State Univ, Manhattan, KS 66506 USA. Louisiana Tech Univ, Ruston, LA 71272 USA. Univ Maryland, College Pk, MD 20742 USA. Boston Univ, Boston, MA 02215 USA. Northeastern Univ, Boston, MA 02115 USA. Univ Michigan, Ann Arbor, MI 48109 USA. Michigan State Univ, E Lansing, MI 48824 USA. Univ Nebraska, Lincoln, NE 68588 USA. Columbia Univ, New York, NY 10027 USA. Univ Rochester, Rochester, NY 14627 USA. SUNY Stony Brook, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. Univ Langston, Langston, OK 73050 USA. Univ Oklahoma, Norman, OK 73019 USA. Brown Univ, Providence, RI 02912 USA. Univ Texas, Arlington, TX 76019 USA. Texas A&M Univ, College Stn, TX 77843 USA. Rice Univ, Houston, TX 77005 USA. Univ Virginia, Charlottesville, VA 22901 USA. Univ Washington, Seattle, WA 98195 USA. Univ Zurich, Zurich, Switzerland. Inst Nucl Phys, Krakow, Poland. RP Joint Inst Nucl Res, Dubna, Russia. RI Chekulaev, Sergey/O-1145-2015; Sznajder, Andre/L-1621-2016; Canelli, Florencia/O-9693-2016; Nomerotski, Andrei/A-5169-2010; Shivpuri, R K/A-5848-2010; Gutierrez, Phillip/C-1161-2011; Dudko, Lev/D-7127-2012; Leflat, Alexander/D-7284-2012; Belyaev, Alexander/F-6637-2015; Kim, Sun Kee/G-2042-2015; Merkin, Mikhail/D-6809-2012; Yip, Kin/D-6860-2013; Kuleshov, Sergey/D-9940-2013; De, Kaushik/N-1953-2013; Oguri, Vitor/B-5403-2013; Alves, Gilvan/C-4007-2013 OI Sznajder, Andre/0000-0001-6998-1108; Canelli, Florencia/0000-0001-6361-2117; Dudko, Lev/0000-0002-4462-3192; Belyaev, Alexander/0000-0002-1733-4408; Kim, Sun Kee/0000-0002-0013-0775; Yip, Kin/0000-0002-8576-4311; Kuleshov, Sergey/0000-0002-3065-326X; De, Kaushik/0000-0002-5647-4489; NR 106 TC 24 Z9 24 U1 0 U2 4 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 2003 VL 67 IS 1 AR 012004 DI 10.1103/PhysRevD.67.012004 PG 53 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 644LB UT WOS:000180918100006 ER PT J AU Abe, K Abe, K Abe, T Adam, I Akimoto, H Aston, D Baird, KG Baltay, C Band, HR Barklow, TL Bauer, JM Bellodi, G Berger, R Blaylock, G Bogart, JR Bower, GR Brau, JE Breidenbach, M Bugg, WM Burnett, TH Burrows, PN Calcaterra, A Cassell, R Chou, A Cohn, HO Coller, JA Convery, MR Cowan, RF Crawford, G Damerell, CJS Daoudi, M de Groot, N de Sangro, R Dong, DN Doser, M Dubois, R Erofeeva, I Eschenburg, V Fahey, S Falciai, D Fernandez, JP Flood, K Frey, R Hart, EL Hasuko, K Hertzbach, SS Huffer, ME Iwasaki, M Jackson, DJ Jacques, P Jaros, JA Jiang, ZY Johnson, AS Johnson, JR Kajikawa, R Kalelkar, M Kang, HJ Kofler, RR Kroeger, RS Langston, M Leith, DWG Lia, V Lin, C Mancinelli, G Manly, S Mantovani, G Markiewicz, TW Maruyama, T McKemey, AK Messner, R Moffeit, KC Moore, TB Morii, M Muller, D Murzin, V Narita, S Nauenberg, U Neal, H Nesom, G Oishi, N Onoprienko, D Panvini, RS Park, CH Peruzzi, I Piccolo, M Piemontese, L Plano, RJ Prepost, R Prescott, CY Ratcliff, BN Reidy, J Reinertsen, PL Rochester, LS Rowson, PC Russell, JJ Saxton, OH Schalk, T Schumm, BA Schwiening, J Serbo, VV Shapiro, G Sinev, NB Snyder, JA Staengle, H Stahl, A Stamer, P Steiner, H Su, D Suekane, F Sugiyama, A Suzuki, S Swartz, M Taylor, FE Thom, J Torrence, E Usher, T Va'vra, J Verdier, R Wagner, DL Waite, AP Walston, S Weidemann, AW Weiss, ER Whitaker, JS Williams, SH Willocq, S Wilson, RJ Wisniewski, WJ Wittlin, JL Woods, M Wright, TR Yamamoto, RK Yashima, J Yellin, SJ Young, CC Yuta, H AF Abe, K Abe, K Abe, T Adam, I Akimoto, H Aston, D Baird, KG Baltay, C Band, HR Barklow, TL Bauer, JM Bellodi, G Berger, R Blaylock, G Bogart, JR Bower, GR Brau, JE Breidenbach, M Bugg, WM Burnett, TH Burrows, PN Calcaterra, A Cassell, R Chou, A Cohn, HO Coller, JA Convery, MR Cowan, RF Crawford, G Damerell, CJS Daoudi, M de Groot, N de Sangro, R Dong, DN Doser, M Dubois, R Erofeeva, I Eschenburg, V Fahey, S Falciai, D Fernandez, JP Flood, K Frey, R Hart, EL Hasuko, K Hertzbach, SS Huffer, ME Iwasaki, M Jackson, DJ Jacques, P Jaros, JA Jiang, ZY Johnson, AS Johnson, JR Kajikawa, R Kalelkar, M Kang, HJ Kofler, RR Kroeger, RS Langston, M Leith, DWG Lia, V Lin, C Mancinelli, G Manly, S Mantovani, G Markiewicz, TW Maruyama, T McKemey, AK Messner, R Moffeit, KC Moore, TB Morii, M Muller, D Murzin, V Narita, S Nauenberg, U Neal, H Nesom, G Oishi, N Onoprienko, D Panvini, RS Park, CH Peruzzi, I Piccolo, M Piemontese, L Plano, RJ Prepost, R Prescott, CY Ratcliff, BN Reidy, J Reinertsen, PL Rochester, LS Rowson, PC Russell, JJ Saxton, OH Schalk, T Schumm, BA Schwiening, J Serbo, VV Shapiro, G Sinev, NB Snyder, JA Staengle, H Stahl, A Stamer, P Steiner, H Su, D Suekane, F Sugiyama, A Suzuki, S Swartz, M Taylor, FE Thom, J Torrence, E Usher, T Va'vra, J Verdier, R Wagner, DL Waite, AP Walston, S Weidemann, AW Weiss, ER Whitaker, JS Williams, SH Willocq, S Wilson, RJ Wisniewski, WJ Wittlin, JL Woods, M Wright, TR Yamamoto, RK Yashima, J Yellin, SJ Young, CC Yuta, H CA SLD Collaboration TI Search for time-dependent B(s)(0)-(B(s)(0))over-bar oscillations using a vertex charge dipole technique SO PHYSICAL REVIEW D LA English DT Article ID PHYSICS AB We report a search for B(s)(0)-<(B(s)(o))over bar> oscillations using a sample of 400 000 hadronic Z(0) decays collected by the SLD experiment. The analysis takes advantage of the electron beam polarization as well as information from the hemisphere opposite that of the reconstructed B decay to tag the B production flavor. The excellent resolution provided by the pixel CCD vertex detector is exploited to cleanly reconstruct both B and cascade D decay vertices, and tag the B decay flavor from the charge difference between them. We exclude the following values of the B(s)(0)-<(B(s)(o))over bar> oscillation frequency: Deltam(s)<4.9 ps(-1) and 7.9pi(+)pi(-) and K-L,K-S-->pi(0)pi(0) decays collected in 1996-1997 by the KTeV experiment (E832) at Fermilab. We compare these four K-->pipi decay rates to measure the direct CP violation parameter Re(epsilon(')/epsilon)=(20.7+/-2.8)x10(-4). We also test CPT symmetry by measuring the relative phase between the CP violating and CP conserving decay amplitudes for K-->pi(+)pi(-) (phi(+-)) and for K-->pi(0)pi(0) (phi(00)). We find the difference between the relative phases to be Deltaphiequivalent tophi(00)-phi(+-)=(+0.39+/-0.50)degrees, and the deviation of phi(+-) from the superweak phase to be phi(+-)-phi(SW)=(+0.61+/-1.19)degrees; both results are consistent with CPT symmetry. In addition, we present new measurements of the K-L-K-S mass difference and K-S lifetime: Deltam=(5261+/-15)x10(6) (h) over bars(-1) and tau(S)=(89.65+/-0.07)x10(-12) s. C1 Univ Wisconsin, Madison, WI 53706 USA. Univ Arizona, Tucson, AZ 85721 USA. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Univ Colorado, Boulder, CO 80309 USA. Elmhurst Coll, Elmhurst, IL 60126 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Osaka Univ, Osaka 5600043, Japan. Rice Univ, Houston, TX 77005 USA. Rutgers State Univ, Piscataway, NJ 08854 USA. Univ Virginia, Dept Phys, Charlottesville, VA 22901 USA. Univ Virginia, Inst Nucl & Particle Phys, Charlottesville, VA 22901 USA. Univ Sao Paulo, Sao Paulo, Brazil. CNRS, CPP Marseille, F-75700 Paris, France. RP Alavi-Harati, A (reprint author), Univ Wisconsin, Madison, WI 53706 USA. OI HSIUNG, YEE/0000-0003-4801-1238 NR 42 TC 136 Z9 136 U1 0 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 2003 VL 67 IS 1 AR 012005 DI 10.1103/PhysRevD.67.1120XX PG 33 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 644LB UT WOS:000180918100007 ER PT J AU Albright, CH Barr, SM AF Albright, CH Barr, SM TI Lifting a realistic SO(10) grand unified model to five dimensions SO PHYSICAL REVIEW D LA English DT Article ID PROTON DECAY; NUCLEON DECAY; NEUTRINO OSCILLATIONS; SUPERSYMMETRIC SO(10); EXTRA DIMENSION; FERMION MASSES; UNIFICATION; HIGGS; GUT; STABILITY AB It has been shown recently that the problem of rapid proton decay induced by dimension-five operators arising from the exchange of colored Higgsinos can be simply avoided in grand unified models where a fifth spatial dimension is compactified on an orbifold. Here we demonstrate that this idea can be used to solve the Higgsino-mediated proton decay problem in any realistic SO(10) model by lifting that model to five dimensions. A particular SO(10) model that has been proposed to explain the pattern of quark and lepton masses and mixings is used as an example. The idea is to break the SO(10) down to the Pati-Salam symmetry by the orbifold boundary conditions. The entire four-dimensional SO(10) model is placed on the physical SO(10) brane except for the gauge fields, the 45 and a single 10 of Higgs fields, which are placed in the five-dimensional bulk. The structure of the Higgs superpotential can be somewhat simplified in doing so, while the Yukawa superpotential and mass matrices derived from it remain essentially unaltered. C1 No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA. RP Albright, CH (reprint author), No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA. OI Albright, Carl/0000-0002-2252-6359 NR 38 TC 14 Z9 14 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 2003 VL 67 IS 1 AR 013002 DI 10.1103/PhysRevD.67.013002 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 644LB UT WOS:000180918100011 ER PT J AU Chekanov, S Krakauer, D Magill, S Musgrave, B Repond, J Yoshida, R Mattingly, MCK Antonioli, P Bari, G Basile, M Bellagamba, L Boscherini, D Bruni, A Bruni, G Romeo, GC Cifarelli, L Cindolo, F Contin, A Corradi, M De Pasquale, S Giusti, P Iacobucci, G Margotti, A Nania, R Palmonari, F Pesci, A Sartorelli, G Zichichi, A Aghuzumtsyan, G Bartsch, D Brock, I Crittenden, J Goers, S Hartmann, H Hilger, E Irrgang, P Jakob, HP Kappes, A Katz, UF Kerger, R Kind, O Paul, E Rautenberg, J Renner, R Schnurbusch, H Stifutkin, A Tandler, J Voss, KC Weber, A Bailey, DS Brook, NH Cole, JE Foster, B Heath, GP Heath, HF Robins, S Rodrigues, E Scott, J Tapper, RJ Wing, M Capua, M Mastroberardino, A Schioppa, M Susinno, G Kim, JY Kim, YK Lee, JH Lim, IT Pac, MY Caldwell, A Helbich, M Liu, X Mellado, B Ning, Y Paganis, S Ren, Z Schmidke, WB Sciulli, F Chwastowski, J Eskreys, A Figiel, J Olkiewicz, K Piotrzkowski, K Przybycien, MB Stopa, P Zawiejski, L Adamczyk, L Bold, T Grabowska-Bold, I Kisielewska, D Kowal, AM Kowal, M Kowalski, T Przybycien, M Suszycki, L Szuba, D Szuba, J Kotanski, A Slominski, W Bauerdick, LAT Behrens, U Borras, K Chiochia, V Dannheim, D Derrick, M Drews, G Fourletova, J Fox-Murphy, A Fricke, U Geiser, A Goebel, F Gottlicher, P Gutsche, O Haas, T Hain, W Hartner, GF Hillert, S Kotz, U Kowalski, H Kramberger, G Labes, H Lelas, D Lohr, B Mankel, R Martinez, M Melzer-Pellmann, IA Moritz, M Notz, D Petrucci, MC Polini, A Raval, A Schneekloth, U Selonke, F Surrow, B Wessoleck, H Wichmann, R Wolf, G Youngman, C Zeuner, W Viani, ALD Meyer, A Schlenstedt, S Barbagli, G Gallo, E Genta, C Pelfer, PG Bamberger, A Benen, A Coppola, N Raach, H Bell, M Bussey, PJ Doyle, AT Glasman, C Hanlon, S Lee, SW Lupi, A McCance, GJ Saxon, DH Skillicorn, IO Gialas, I Bodmann, B Carli, T Holm, U Klimek, K Krumnack, N Lohrmann, E Milite, M Salehi, H Stonjek, S Wick, K Ziegler, A Ziegler, A Collins-Tooth, C Foudas, C Goncalo, R Long, KR Metlica, F Miller, DB Tapper, AD Walker, R Cloth, P Filges, D Kuze, M Nagano, K Tokushuku, K Yamada, S Yamazaki, Y Barakbaev, AN Boos, EG Pokrovskiy, NS Zhautykov, BO Lim, H Son, D Barreiro, F Gonzalez, O Labarga, L del Peso, J Redondo, I Terron, J Vazquez, M Barbi, M Bertolin, A Corriveau, F Ochs, A Padhi, S Stairs, DG St-Laurent, M Tsurugai, T Antonov, A Danilov, P Dolgoshein, BA Gladkov, D Sosnovtsev, V Suchkov, S Dementiev, RK Ermolov, PF Golubkov, YA Katkov, II Khein, LA Korzhavina, IA Kuzmin, VA Levchenko, BB Lukina, OY Proskuryakov, AS Shcheglova, LM Vlasov, NN Zotkin, SA Bokel, C Botje, M Engelen, J Grijpink, S Koffeman, E Kooijman, P Maddox, E Pellegrino, A Schagen, S Tassi, E Tiecke, H Tuning, N Velthuis, JJ Wiggers, L de Wolf, E Brummer, N Bylsma, B Durkin, LS Gilmore, J Ginsburg, CM Kim, CL Ling, TY Boogert, S Cooper-Sarkar, AM Devenish, RCE Ferrando, J Grzelak, G Matsushita, T Rigby, M Ruske, O Sutton, MR Walczak, R Brugnera, R Carlin, R Dal Corso, F Dusini, S Garfagnini, A Limentani, S Longhin, A Parenti, A Posocco, M Stanco, L Turcato, M Heaphy, EA Oh, BY Saull, PRB Whitmore, JJ Iga, Y D'Agostini, G Marini, G Nigro, A Cormack, C Hart, JC McCubbin, NA Heusch, C Park, IH Pavel, N Abramowicz, H Gabareen, A Kananov, S Kreisel, A Levy, A Abe, T Fusayasu, T Kagawa, S Kohno, T Tawara, T Yamashita, T Hamatsu, R Hirose, T Inuzuka, M Kitamura, S Matsuzawa, K Nishimura, T Arneodo, M Cartiglia, N Cirio, R Costa, M Ferrero, MI Maselli, S Monaco, V Peroni, C Ruspa, M Sacchi, R Solano, A Staiano, A Galea, R Koop, T Levman, GM Martin, JF Mirea, A Sabetfakhri, A Butterworth, JM Gwenlan, C Hall-Wilton, R Jones, TW Lightwood, MS Loizides, JH West, BJ Ciborowski, J Ciesielski, R Nowak, RJ Pawlak, JM Smalska, B Sztuk, J Tymieniecka, T Ukleja, A Ukleja, J Zarnecki, AF Adamus, M Plucinski, P Eisenberg, Y Gladilin, LK Hochman, D Karshon, U Kcira, D Lammers, S Li, L Reeder, DD Savin, AA Smith, WH Deshpande, A Dhawan, S Hughes, VW Straub, PB Bhadra, S Catterall, CD Fourletov, S Menary, S Soares, M Standage, J AF Chekanov, S Krakauer, D Magill, S Musgrave, B Repond, J Yoshida, R Mattingly, MCK Antonioli, P Bari, G Basile, M Bellagamba, L Boscherini, D Bruni, A Bruni, G Romeo, GC Cifarelli, L Cindolo, F Contin, A Corradi, M De Pasquale, S Giusti, P Iacobucci, G Margotti, A Nania, R Palmonari, F Pesci, A Sartorelli, G Zichichi, A Aghuzumtsyan, G Bartsch, D Brock, I Crittenden, J Goers, S Hartmann, H Hilger, E Irrgang, P Jakob, HP Kappes, A Katz, UF Kerger, R Kind, O Paul, E Rautenberg, J Renner, R Schnurbusch, H Stifutkin, A Tandler, J Voss, KC Weber, A Bailey, DS Brook, NH Cole, JE Foster, B Heath, GP Heath, HF Robins, S Rodrigues, E Scott, J Tapper, RJ Wing, M Capua, M Mastroberardino, A Schioppa, M Susinno, G Kim, JY Kim, YK Lee, JH Lim, IT Pac, MY Caldwell, A Helbich, M Liu, X Mellado, B Ning, Y Paganis, S Ren, Z Schmidke, WB Sciulli, F Chwastowski, J Eskreys, A Figiel, J Olkiewicz, K Piotrzkowski, K Przybycien, MB Stopa, P Zawiejski, L Adamczyk, L Bold, T Grabowska-Bold, I Kisielewska, D Kowal, AM Kowal, M Kowalski, T Przybycien, M Suszycki, L Szuba, D Szuba, J Kotanski, A Slominski, W Bauerdick, LAT Behrens, U Borras, K Chiochia, V Dannheim, D Derrick, M Drews, G Fourletova, J Fox-Murphy, A Fricke, U Geiser, A Goebel, F Gottlicher, P Gutsche, O Haas, T Hain, W Hartner, GF Hillert, S Kotz, U Kowalski, H Kramberger, G Labes, H Lelas, D Lohr, B Mankel, R Martinez, M Melzer-Pellmann, IA Moritz, M Notz, D Petrucci, MC Polini, A Raval, A Schneekloth, U Selonke, F Surrow, B Wessoleck, H Wichmann, R Wolf, G Youngman, C Zeuner, W Viani, ALD Meyer, A Schlenstedt, S Barbagli, G Gallo, E Genta, C Pelfer, PG Bamberger, A Benen, A Coppola, N Raach, H Bell, M Bussey, PJ Doyle, AT Glasman, C Hanlon, S Lee, SW Lupi, A McCance, GJ Saxon, DH Skillicorn, IO Gialas, I Bodmann, B Carli, T Holm, U Klimek, K Krumnack, N Lohrmann, E Milite, M Salehi, H Stonjek, S Wick, K Ziegler, A Ziegler, A Collins-Tooth, C Foudas, C Goncalo, R Long, KR Metlica, F Miller, DB Tapper, AD Walker, R Cloth, P Filges, D Kuze, M Nagano, K Tokushuku, K Yamada, S Yamazaki, Y Barakbaev, AN Boos, EG Pokrovskiy, NS Zhautykov, BO Lim, H Son, D Barreiro, F Gonzalez, O Labarga, L del Peso, J Redondo, I Terron, J Vazquez, M Barbi, M Bertolin, A Corriveau, F Ochs, A Padhi, S Stairs, DG St-Laurent, M Tsurugai, T Antonov, A Danilov, P Dolgoshein, BA Gladkov, D Sosnovtsev, V Suchkov, S Dementiev, RK Ermolov, PF Golubkov, YA Katkov, II Khein, LA Korzhavina, IA Kuzmin, VA Levchenko, BB Lukina, OY Proskuryakov, AS Shcheglova, LM Vlasov, NN Zotkin, SA Bokel, C Botje, M Engelen, J Grijpink, S Koffeman, E Kooijman, P Maddox, E Pellegrino, A Schagen, S Tassi, E Tiecke, H Tuning, N Velthuis, JJ Wiggers, L de Wolf, E Brummer, N Bylsma, B Durkin, LS Gilmore, J Ginsburg, CM Kim, CL Ling, TY Boogert, S Cooper-Sarkar, AM Devenish, RCE Ferrando, J Grzelak, G Matsushita, T Rigby, M Ruske, O Sutton, MR Walczak, R Brugnera, R Carlin, R Dal Corso, F Dusini, S Garfagnini, A Limentani, S Longhin, A Parenti, A Posocco, M Stanco, L Turcato, M Heaphy, EA Oh, BY Saull, PRB Whitmore, JJ Iga, Y D'Agostini, G Marini, G Nigro, A Cormack, C Hart, JC McCubbin, NA Heusch, C Park, IH Pavel, N Abramowicz, H Gabareen, A Kananov, S Kreisel, A Levy, A Abe, T Fusayasu, T Kagawa, S Kohno, T Tawara, T Yamashita, T Hamatsu, R Hirose, T Inuzuka, M Kitamura, S Matsuzawa, K Nishimura, T Arneodo, M Cartiglia, N Cirio, R Costa, M Ferrero, MI Maselli, S Monaco, V Peroni, C Ruspa, M Sacchi, R Solano, A Staiano, A Galea, R Koop, T Levman, GM Martin, JF Mirea, A Sabetfakhri, A Butterworth, JM Gwenlan, C Hall-Wilton, R Jones, TW Lightwood, MS Loizides, JH West, BJ Ciborowski, J Ciesielski, R Nowak, RJ Pawlak, JM Smalska, B Sztuk, J Tymieniecka, T Ukleja, A Ukleja, J Zarnecki, AF Adamus, M Plucinski, P Eisenberg, Y Gladilin, LK Hochman, D Karshon, U Kcira, D Lammers, S Li, L Reeder, DD Savin, AA Smith, WH Deshpande, A Dhawan, S Hughes, VW Straub, PB Bhadra, S Catterall, CD Fourletov, S Menary, S Soares, M Standage, J CA ZEUS Collaboration TI ZEUS next-to-leading-order QCD analysis of data on deep inelastic scattering SO PHYSICAL REVIEW D LA English DT Review ID DEUTERON STRUCTURE FUNCTIONS; DYNAMICAL PARTON DISTRIBUTIONS; FLAVOR STRUCTURE FUNCTIONS; F-2 STRUCTURE-FUNCTION; PERTURBATION-THEORY; HIGHER TWIST; MUON SCATTERING; GLOBAL ANALYSIS; CROSS-SECTIONS; EP SCATTERING AB Next-to-leading-order QCD analyses of the ZEUS data on deep inelastic scattering together with fixed-target data have been performed, from which the gluon and quark densities of the proton and the value of the strong coupling constant alpha(s)(M-Z) were extracted. The study includes a full treatment of the experimental systematic uncertainties including point-to-point correlations. The resulting uncertainties in the parton density functions are presented. A combined fit for alpha(s)(M-Z) and the gluon and quark densities yields a value for alpha(s)(M-Z) in agreement with the world average. The parton density functions derived from ZEUS data alone indicate the importance of HERA data in determining the sea quark and gluon distributions at low x. The limits of applicability of the theoretical formalism have been explored by comparing the fit predictions to ZEUS data at very low Q(2). C1 Argonne Natl Lab, Argonne, IL 60439 USA. Andrews Univ, Berrien Springs, MI 49104 USA. Univ Bologna, Bologna, Italy. INFN Bologna, Bologna, Italy. Univ Bonn, Inst Phys, D-5300 Bonn, Germany. Univ Bristol, HH Wills Phys Lab, Bristol BS8 1TL, Avon, England. Univ Calabria, Dept Phys, I-87036 Cosenza, Italy. Ist Nazl Fis Nucl, Cosenza, Italy. Chonnam Natl Univ, Kwangju, South Korea. Columbia Univ, Nevis Labs, Irvington, NY 10027 USA. Inst Nucl Phys, Krakow, Poland. Univ Min & Met Krakow, Fac Phys & Nucl Tech, Krakow, Poland. Jagiellonian Univ, Dept Phys, Krakow, Poland. DESY, D-2000 Hamburg, Germany. DESY Zeuthen, Zeuthen, Germany. Univ Florence, Florence, Italy. Ist Nazl Fis Nucl, I-50125 Florence, Italy. Univ Freiburg, Fak Phys, D-7800 Freiburg, Germany. Univ Glasgow, Dept Phys & Astron, Glasgow, Lanark, Scotland. Univ Aegean, Dept Engn Management & Finance, Mitilini, Greece. Univ Hamburg, Inst Expt Phys, Hamburg, Germany. Univ London Imperial Coll Sci Technol & Med, High Energy Nucl Phys Grp, London, England. Forschungszentrum Julich, Inst Kernphys, D-5170 Julich, Germany. KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki, Japan. Minist Educ & Sci Kazakhstan, Inst Phys & Technol, Alma Ata, Kazakhstan. Kyungpook Natl Univ, Taegu 702701, South Korea. Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain. McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada. Meiji Gakuin Univ, Fac Gen Educ, Yokohama, Kanagawa, Japan. Moscow Phys Engn Inst, Moscow, Russia. Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow, Russia. NIKHEF, Amsterdam, Netherlands. Univ Amsterdam, Amsterdam, Netherlands. Ohio State Univ, Dept Phys, Columbus, OH 43210 USA. Univ Oxford, Dept Phys, Oxford, England. Univ Padua, Dipartimento Fis, Padua, Italy. Ist Nazl Fis Nucl, Padua, Italy. Penn State Univ, Dept Phys, University Pk, PA 16802 USA. Polytech Univ, Sagamihara, Kanagawa, Japan. Univ Roma La Sapienza, Dipartimento Fis, Rome, Italy. Ist Nazl Fis Nucl, Rome, Italy. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA. Ewha Womans Univ, Dept Phys, Seoul, South Korea. Univ Siegen, Fachbereich Phys, D-5900 Siegen, Germany. Tel Aviv Univ, Sch Phys, Raymond & Beverly Sackler Fac Exact Sci, IL-69978 Tel Aviv, Israel. Univ Tokyo, Dept Phys, Tokyo 113, Japan. Tokyo Metropolitan Univ, Dept Phys, Tokyo, Japan. Univ Turin, Dipartimento Fis Sperimentale, Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada. UCL, Dept Phys & Astron, London, England. Warsaw Univ, Inst Expt Phys, Warsaw, Poland. Inst Nucl Studies, PL-00681 Warsaw, Poland. Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel. Univ Wisconsin, Dept Phys, Madison, WI 53706 USA. Yale Univ, Dept Phys, New Haven, CT 06520 USA. York Univ, Dept Phys, N York, ON M3J 1P3, Canada. Univ Tokyo, Tokyo, Japan. Univ Piemonte Orientale, Novara, Italy. Univ Lodz, PL-90131 Lodz, Poland. RP Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Tassi, Enrico/K-3958-2015; Li, Liang/O-1107-2015; Katz, Uli/E-1925-2013; Ferrando, James/A-9192-2012; Wiggers, Leo/B-5218-2015; De Pasquale, Salvatore/B-9165-2008; Gladilin, Leonid/B-5226-2011; Goncalo, Ricardo/M-3153-2016; Suchkov, Sergey/M-6671-2015; dusini, stefano/J-3686-2012; Doyle, Anthony/C-5889-2009; Proskuryakov, Alexander/J-6166-2012; collins-tooth, christopher/A-9201-2012; Golubkov, Yury/E-1643-2012; Levchenko, B./D-9752-2012; Dementiev, Roman/K-7201-2012; OI Li, Liang/0000-0001-6411-6107; Katz, Uli/0000-0002-7063-4418; Ferrando, James/0000-0002-1007-7816; Wiggers, Leo/0000-0003-1060-0520; De Pasquale, Salvatore/0000-0001-9236-0748; Gladilin, Leonid/0000-0001-9422-8636; Goncalo, Ricardo/0000-0002-3826-3442; dusini, stefano/0000-0002-1128-0664; Doyle, Anthony/0000-0001-6322-6195; PAGANIS, STATHES/0000-0002-1950-8993 NR 105 TC 158 Z9 158 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 2003 VL 67 IS 1 AR 012007 DI 10.1103/PhysRevD.67.012007 PG 21 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 644LB UT WOS:000180918100009 ER PT J AU Chiang, CW Luo, ZM Rosner, JL AF Chiang, CW Luo, ZM Rosner, JL TI Two-body Cabibbo-suppressed charmed meson decays SO PHYSICAL REVIEW D LA English DT Article ID U-SPIN SYMMETRY; B-MESONS; NONLEPTONIC DECAYS; SU(3) SYMMETRY; PSEUDOSCALARS AB The singly Cabibbo-suppressed decays of charmed particles governed by the quark subprocesses c-->su (s) over bar and c-->du (d) over bar are analyzed using a flavor-topology approach, based on a previous analysis of the Cabibbo-favored decays governed by c-->su (d) over bar. Decays to PP and PV, where P is a pseudoscalar meson and V is a vector meson, are considered. We include processes in which eta and eta(') are produced. C1 Argonne Natl Lab, HEP Div, Argonne, IL 60439 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Univ Chicago, Dept Phys, Chicago, IL 60637 USA. RP Chiang, CW (reprint author), Argonne Natl Lab, HEP Div, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 28 TC 35 Z9 35 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 2003 VL 67 IS 1 AR 014001 DI 10.1103/PhysRevD.67.014001 PG 9 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 644LB UT WOS:000180918100022 ER PT J AU Dedes, A Pilaftsis, A AF Dedes, A Pilaftsis, A TI Resummed effective Lagrangian for Higgs-mediated flavor-changing neutral current interactions in the CP-violating MSSM SO PHYSICAL REVIEW D LA English DT Article ID SUPERSYMMETRIC STANDARD MODEL; LARGE-TAN-BETA; ELECTRIC-DIPOLE MOMENTS; CANCELLATION MECHANISM; 2-HIGGS-DOUBLET MODEL; THRESHOLD CORRECTIONS; MATRIX-ELEMENTS; MASS-MATRIX; KAON SYSTEM; QUARK MASS AB We derive the general resummed effective Lagrangian for Higgs-mediated flavor-changing neutral-current (FCNC) interactions in the minimal supersymmetric standard model, without resorting to particular assumptions that rely on the squark mass or the quark-Yukawa structure of the theory. In our derivation we also include the possibility of explicit CP violation through the Cabibbo-Kobayashi-Maskawa mixing matrix and soft supersymmetry-breaking mass terms. The advantages of our resummed FCNC effective Lagrangian are explicitly demonstrated within the context of phenomenologically motivated scenarios. We obtain new testable predictions in the large tan beta regime of the theory for CP-conserving and CP-violating observables related to the K- and B-meson systems, such as DeltaM(K,B), epsilon(K), epsilon(')/epsilon, B(B-d,B-s-->l(+)l(-)) and their associated leptonic CP asymmetries. Finally, based on our resummed FCNC effective Lagrangian, we can identify configurations in the soft supersymmetry-breaking parameter space, for which a kind of a Glashow-Iliopoulos-Maiani-cancellation mechanism becomes operative and hence all Higgs-mediated, tan beta-enhanced effects on K- and B-meson FCNC observables vanish. C1 Univ Bonn, Inst Phys, D-53115 Bonn, Germany. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Manchester, Dept Phys & Astron, Manchester M13 9PL, Lancs, England. RP Dedes, A (reprint author), Univ Bonn, Inst Phys, Nussallee 12, D-53115 Bonn, Germany. NR 100 TC 135 Z9 135 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 2003 VL 67 IS 1 AR 015012 DI 10.1103/PhysRevD.67.015012 PG 19 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 644LB UT WOS:000180918100068 ER PT J AU Harada, J Hashimoto, S Kronfeld, AS Onogi, T AF Harada, J Hashimoto, S Kronfeld, AS Onogi, T TI Perturbative calculation of O(a) improvement coefficients SO PHYSICAL REVIEW D LA English DT Article ID NONPERTURBATIVE RENORMALIZATION-CONSTANTS; IMPROVED LATTICE QCD; CONTINUUM-LIMIT; QUANTUM CHROMODYNAMICS; WARD IDENTITIES; WILSON FERMIONS; OPERATORS AB We compute several coefficients needed for O(a) improvement of currents in perturbation theory, using the Brodsky-Lepage-Mackenzie prescription for choosing an optimal scale q(*). We then compare the results to non-perturbative calculations. Normalization factors of the vector and axial vector currents show good agreement, especially when allowing for small two-loop effects. On the other hand, there are large discrepancies in the coefficients of O(a) improvement terms. We suspect that they arise primarily from power corrections inherent in the nonperturbative methods. C1 Hiroshima Univ, Dept Phys, Higashihiroshima 7398526, Japan. KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan. Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA. Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan. RP Hiroshima Univ, Dept Phys, Higashihiroshima 7398526, Japan. NR 29 TC 8 Z9 8 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 2003 VL 67 IS 1 AR 014503 DI 10.1103/PhysRevD.67.014503 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 644LB UT WOS:000180918100052 ER PT J AU Hatta, Y Ikeda, T AF Hatta, Y Ikeda, T TI Universality, the QCD critical and tricritical point, and the quark number susceptibility SO PHYSICAL REVIEW D LA English DT Article ID CHIRAL PHASE-TRANSITION; PION DECAY CONSTANT; QUANTUM CHROMODYNAMICS; FINITE-TEMPERATURE; SYMMETRY BREAKING; COLOR SUPERCONDUCTIVITY; LADDER APPROXIMATION; BARYON DENSITY; FLUCTUATIONS; RESTORATION AB The quark number susceptibility near the QCD critical end point (CEP), the tricritical point (TCP) and the O(4) critical line at finite temperature and quark chemical potential are investigated. Based on the universality argument and numerical model calculations we propose the possibility that the hidden tricritical point strongly affects the critical phenomena around the critical end-point. We make a semiquantitative study of the quark number susceptibility near CEP or TCP for several quark masses on the basis of the Cornwall-Jackiw-Tomboulis potential for QCD in the improved-ladder approximation. The results show that the susceptibility is enhanced in a wide region around the CEP, inside which the critical exponent gradually changes from that of the CEP to that of the TCP, indicating a crossover of different universality classes. C1 Kyoto Univ, Dept Phys, Kyoto 6068502, Japan. RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan. Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA. RP Hatta, Y (reprint author), Kyoto Univ, Dept Phys, Kyoto 6068502, Japan. NR 54 TC 203 Z9 207 U1 0 U2 3 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 2003 VL 67 IS 1 AR 014028 DI 10.1103/PhysRevD.67.014028 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 644LB UT WOS:000180918100049 ER PT J AU Horvath, I Dong, SJ Draper, T Lee, FX Liu, KF Thacker, HB Zhang, JB AF Horvath, I Dong, SJ Draper, T Lee, FX Liu, KF Thacker, HB Zhang, JB TI Local structure of topological charge fluctuations in QCD SO PHYSICAL REVIEW D LA English DT Article ID INDEX THEOREM; LATTICE AB We consider the lattice topological charge density introduced by Hasenfratz, Laliena, and Niedermayer and propose its eigenmode expansion as a tool to investigate the structure of topological charge fluctuations in QCD. The resulting effective density is built from local chiralities studied previously. At every order of the expansion, the density exactly sums up to the global topological charge, and the leading term describes the maximally smooth space-time distribution of charge relevant for propagating light fermions. We use this framework to demonstrate our previous suggestion that the bulk of the topological charge in QCD does not effectively appear in the form of quantized unit lumps. Our conclusion implies that it is unlikely that the mixing of "would-be" zero modes associated with such lumps is the prevalent microscopic mechanism for spontaneous chiral symmetry breaking in QCD. We also present the first results quantitatively characterizing the space-time behavior of effective densities. For coherent fluctuations contained in spherical regions, we find a continuous distribution of associated charges essentially ending at approximate to 0.5. C1 Univ Kentucky, Dept Phys, Lexington, KY 40506 USA. George Washington Univ, Dept Phys, Washington, DC 20052 USA. George Washington Univ, Ctr Nucl Studies, Washington, DC 20052 USA. Jefferson Lab, Newport News, VA 23606 USA. Univ Virginia, Dept Phys, Charlottesville, VA 22901 USA. Univ Adelaide, CSSM, Adelaide, SA 5005, Australia. Univ Adelaide, Dept Phys & Math Phys, Adelaide, SA 5005, Australia. RP Horvath, I (reprint author), Univ Kentucky, Dept Phys, Lexington, KY 40506 USA. NR 19 TC 40 Z9 40 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 2003 VL 67 IS 1 AR 011501 DI 10.1103/PhysRevD.67.011501 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 644LB UT WOS:000180918100002 ER PT J AU Logan, HE Su, SF AF Logan, HE Su, SF TI Variation of the cross section for e(+)e(-)-> W+H- in the minimal supersymmetric standard model SO PHYSICAL REVIEW D LA English DT Article ID EVEN HIGGS BOSONS; COLLISIONS; MASSES; MSSM AB We study the loop-induced process e(+)e(-)-->W+H- in the minimal supersymmetric standard model (MSSM). This process allows the charged Higgs boson to be produced in e(+)e(-) collisions when e(+)e(-)-->H+H- is kinematically forbidden due to a large charged Higgs boson mass. We scan over the MSSM parameters subject to experimental constraints to examine the range of values the cross section can take. We find that large enhancements of the cross section over that in a nonsupersymmetric two Higgs doublet model are possible, especially for large tan beta and light top and bottom squarks. Choosing a few typical MSSM parameter sets, we show the regions in the m(H)(+/-)-tan beta plane in which at least 10 W+/-H-/+ events would be produced at the e(+)e(-) collider. C1 Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA. Univ Wisconsin, Dept Phys, Madison, WI 53706 USA. CALTECH, Pasadena, CA 91125 USA. RP Logan, HE (reprint author), Fermilab Natl Accelerator Lab, Dept Theoret Phys, POB 500, Batavia, IL 60510 USA. NR 23 TC 18 Z9 18 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 2003 VL 67 IS 1 AR 017703 DI 10.1103/PhysRevD.67.017703 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 644LB UT WOS:000180918100082 ER PT J AU Maltoni, F Paul, K Stelzer, T Willenbrock, S AF Maltoni, F Paul, K Stelzer, T Willenbrock, S TI Color-flow decomposition of QCD amplitudes SO PHYSICAL REVIEW D LA English DT Article ID HELICITY AMPLITUDES; HADRON-COLLISIONS; GAUGE-THEORIES AB We introduce a new color decomposition for multiparton amplitudes in QCD, free of fundamental-representation matrices and structure constants. This decomposition has a physical interpretation in terms of the flow of color, which makes it ideal for merging with shower Monte Carlo programs. The color-flow decomposition allows for very efficient evaluation of amplitudes with many quarks and gluons, many times faster than the standard color decomposition based on fundamental-representation matrices. This will increase the speed of event generators for multijet processes, which are the principal backgrounds to signals of new physics at colliders. C1 Univ Illinois, Dept Phys, Urbana, IL 61801 USA. Fermilab Natl Accelerator Lab, Dept Theoret Phys, Batavia, IL 60510 USA. RP Univ Illinois, Dept Phys, 1110 W Green St, Urbana, IL 61801 USA. NR 30 TC 65 Z9 65 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 2003 VL 67 IS 1 AR 014026 DI 10.1103/PhysRevD.67.014026 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 644LB UT WOS:000180918100047 ER PT J AU Martin, SP Wells, JD AF Martin, SP Wells, JD TI Superconservative interpretation of muon g-2 results applied to supersymmetry SO PHYSICAL REVIEW D LA English DT Article ID ANOMALOUS MAGNETIC-MOMENT; DIPOLE-MOMENT; DARK-MATTER; CONSTRAINTS; SUPERGRAVITY; MODELS; MSSM; BREAKING; PHYSICS; PHASES AB The recent developments in theory and experiment related to the anomalous magnetic moment of the muon are applied to supersymmetry. We follow a very cautious course, demanding that the supersymmetric contributions fit within five standard deviations of the difference between experiment and the standard model prediction. Arbitrarily small supersymmetric contributions are then allowed, so no upper bounds on superpartner masses result. Nevertheless, nontrivial exclusions are found. We characterize the substantial region of parameter space ruled out by this analysis that has not been probed by any previous experiment. We also discuss some implications of the results for forthcoming collider experiments. C1 No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Michigan, MCTP, Dept Phys, Ann Arbor, MI 48109 USA. RP Martin, SP (reprint author), No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA. NR 45 TC 35 Z9 35 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 2003 VL 67 IS 1 AR 015002 DI 10.1103/PhysRevD.67.015002 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 644LB UT WOS:000180918100058 ER PT J AU Semertzidis, YK Danby, GT Lazarus, DM AF Semertzidis, YK Danby, GT Lazarus, DM TI New laboratory technique for measuring the photon charge SO PHYSICAL REVIEW D LA English DT Article ID ELECTRIC CHARGE AB A measurement of the deflection of a laser beam in a modulated magnetic field with a prototype apparatus has produced an upper limit on the charge of the photon of 8.5x10(-17)e. It is shown that an improved apparatus could attain a sensitivity of 10(-21)e. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Semertzidis, YK (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. RI Semertzidis, Yannis K./N-1002-2013 NR 4 TC 7 Z9 8 U1 1 U2 2 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2821 J9 PHYS REV D JI Phys. Rev. D PD JAN 1 PY 2003 VL 67 IS 1 AR 017701 DI 10.1103/PhysRevD.67.017701 PG 2 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 644LB UT WOS:000180918100080 ER PT J AU Arevalo, E Mertens, FG Gaididei, Y Bishop, AR AF Arevalo, E Mertens, FG Gaididei, Y Bishop, AR TI Thermal diffusion of supersonic solitons in an anharmonic chain of atoms SO PHYSICAL REVIEW E LA English DT Article ID KORTEWEG-DEVRIES EQUATION; ALPHA-HELICAL PROTEINS; SOLITARY EXCITATIONS; HEISENBERG CHAIN; DYNAMICS; TRANSPORT; ENERGY; MOTION; MODEL AB We study the nonequilibrium diffusion dynamics of supersonic lattice solitons in a classical chain of atoms with nearest-neighbor interactions coupled to a heat bath. As a specific example we choose an interaction with cubic anharmonicity. The coupling between the system and a thermal bath with a given temperature is made by adding noise, delta correlated in time and space, and damping to the set of discrete equations of motion. Working in the continuum limit and changing to the sound velocity frame we derive a Korteweg-de Vries equation with noise and damping. We apply a collective coordinate approach which yields two stochastic ODEs which are solved approximately by a perturbation analysis. This finally yields analytical expressions for the variances of the soliton position and velocity. We perform Langevin dynamics simulations for the original discrete system which confirm the predictions of our analytical calculations, namely, noise-induced superdiffusive behavior which scales with the temperature and depends strongly on the initial soliton velocity. A normal diffusion behavior is observed for solitons with very low energy, where the noise-induced phonons also make a significant contribution to the soliton diffusion. C1 Univ Bayreuth, Inst Phys, D-95440 Bayreuth, Germany. Inst Theoret Phys, UA-252143 Kiev, Ukraine. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. RP Arevalo, E (reprint author), Univ Bayreuth, Inst Phys, D-95440 Bayreuth, Germany. NR 40 TC 16 Z9 16 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JAN PY 2003 VL 67 IS 1 AR 016610 DI 10.1103/PhysRevE.67.016610 PN 2 PG 15 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 646CV UT WOS:000181018000085 PM 12636628 ER PT J AU Fournier, KB Faenov, AY Pikuz, TA Skobelev, IY Belyaev, VS Vinogradov, VI Kyrilov, AS Matafonov, AP Bellucci, I Martellucci, S Petrocelli, G Auguste, T Hulin, S Monot, P D'Oliveira, P AF Fournier, KB Faenov, AY Pikuz, TA Skobelev, IY Belyaev, VS Vinogradov, VI Kyrilov, AS Matafonov, AP Bellucci, I Martellucci, S Petrocelli, G Auguste, T Hulin, S Monot, P D'Oliveira, P TI Influence of optical thickness and hot electrons on Rydberg spectra of Ne-like and F-like copper ions SO PHYSICAL REVIEW E LA English DT Article ID SUBPICOSECOND LASER-PULSES; X-RAY SPECTROSCOPY; SOLID TARGETS; COMPLEX SPECTRA; CROSS-SECTIONS; SCALE LENGTHS; PLASMAS; ABSORPTION; INTENSITY; EMISSION AB Spectra in the 7.10 to 8.60 Angstrom range from highly charged copper ions are observed from three different laser-produced plasmas (LPPs). The LPPs are formed by a 15-ns Nd:glass laser pulse (type I: E(pulse)=1-8 J, lambda=1.064 mum), a 1-ps Nd:glass laser pulse (type II: E(pulse)=1 J, lambda=1.055 mum), and a 60-fs Ti:sapphire laser pulse (type III: E(pulse)=800 mJ, lambda=790 nm). The spectra of high-n (nless than or equal to14) transitions in highly charged copper ions, Cu(19+) to Cu(21+), are recorded with a high energy resolution (lambda/Deltalambda=3000-8000) spectrometer using a spherically bent mica or quartz crystal. Collisional-radiative models are computed for the emission from each plasma. The sensitivity of the model spectra to opacity effects and to populations of superthermal electrons is studied. For the type I LPPs, opacity effects, treated with escape factors, are necessary to get the correct relative intensities of high-n (n=5, 6) Ne-like Cu(19+) emission features. In the case of the type II LPPs, the contrast between the laser prepulse and the main pulse has been varied from low, I(main)/I(pp)=7x10(4), to high, I(main)/I(pp)=3.8x10(7). For plasmas from low contrast shots, we find good agreement between the observed spectra and optically thin simulations with bulk electron temperatures T(bulk)=0.4 keV and a small population of superthermal electrons (T(hot)=5.0 keV) that is f(hot)less than or equal to10(-5) of the bulk electron population. For high-contrast type II LPPs, we find higher densities and a combination of f(hot)similar to10(-5) and escape factors best describes the data. For the type III 60-fs LPPs, a population of superthermal electrons (T(hot)approximate to5 keV) that is approximate to5x10(-5) of the bulk electron population (T(bulk)approximate to0.2 keV) is required to reproduce the observed spectra. The effect of both escape factors and hot electrons in the CR models is to increase the ionization balance and dramatically increase the number of strong lines for each ion considered. We have studied both opacity effects and hot-electron influence on high-n transitions of highly charged Ne-, F-, and O-like ions. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. VNIIFTRI, Multicharged Ions Spectra Data Ctr, Moscow 141570, Russia. Cent Res Inst Machine Bldg, Korolev 141070, Moscow Region, Russia. Univ Roma Tor Vergata, INFM, Dipartimento Sci & Tecnol Fis & Energet, I-00133 Rome, Italy. Ctr Etud Saclay, CEA, DRECAM, Serv Photons Atomes & Mol, F-91191 Gif Sur Yvette, France. RP Fournier, KB (reprint author), Lawrence Livermore Natl Lab, POB 808,L-41, Livermore, CA 94550 USA. RI matafonov, anatoly/R-7542-2016 NR 41 TC 20 Z9 20 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JAN PY 2003 VL 67 IS 1 AR 016402 DI 10.1103/PhysRevE.67.016402 PN 2 PG 14 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 646CV UT WOS:000181018000063 PM 12636606 ER PT J AU McAllister, R Meucci, R DeShazer, D Roy, R AF McAllister, R Meucci, R DeShazer, D Roy, R TI Competition between two frequencies for phase synchronization of a chaotic laser SO PHYSICAL REVIEW E LA English DT Article AB Competition between two distinct driving frequencies to phase synchronize the intensity dynamics of a chaotic laser has been observed. The phase of the chaotic intensity signal is constructed using the complex analytic signal. Competing frequencies alternately show phase locking and phase slipping. Competition has been quantified by calculating the portion of time the laser phase locks to each of the driving frequencies and their average. C1 Univ Maryland, Dept Phys, College Pk, MD 20742 USA. Univ Maryland, IREAP, College Pk, MD 20742 USA. Oak Ridge Natl Lab, CESAR, Comp & Computat Sci Directorate, Oak Ridge, TN 37831 USA. Ist Nazl Ott Applicata, I-50125 Florence, Italy. Univ Maryland, IPST, College Pk, MD 20742 USA. RP McAllister, R (reprint author), Univ Maryland, Dept Phys, College Pk, MD 20742 USA. RI Meucci, @/Q-9545-2016; Roy, Rajarshi/F-1898-2017 OI Roy, Rajarshi/0000-0002-2381-829X NR 17 TC 15 Z9 15 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JAN PY 2003 VL 67 IS 1 AR 015202 DI 10.1103/PhysRevE.67.015202 PN 2 PG 4 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 646CV UT WOS:000181018000005 PM 12636548 ER PT J AU Rivera, JL McCabe, C Cummings, PT AF Rivera, JL McCabe, C Cummings, PT TI Molecular simulations of liquid-liquid interfacial properties: Water-n-alkane and water-methanol-n-alkane systems SO PHYSICAL REVIEW E LA English DT Article ID X-RAY REFLECTIVITY; LENNARD-JONES FLUIDS; SURFACE-TENSION; COMPUTER-SIMULATION; CAPILLARY WAVES; DYNAMICS SIMULATIONS; HEXANE; EQUILIBRIA; MIXTURES; PENTANE AB Direct molecular dynamics simulations of the liquid-liquid interface of water-n-alkane and water-methanol-n-alkane systems have been performed in order to study the interfacial properties of these systems. The simulations were carried out using the NERD revised force field of Nath for the n-alkanes, the simple point charge extended model for water, and the optimized potential for liquid simulations model for methanol. In order to validate the model employed in this work for the n-alkanes we calculated the coexisting densities, surface tension, and thickness of the interface for pure n-pentane. For all the systems studied the interfacial tension and thickness were calculated at 298.15 K. Our results show that, by adjusting the number of molecules to reproduce the liquid densities in the direct simulation method of the liquid-liquid interface in multicomponent systems, we are able to reproduce available experimental data for interfacial tension. The interfacial thickness is underpredicted and a constant negative deviation of similar to2.5 Angstrom from the experimental data is usually observed. We find that methanol acts like surfactant when it is added to the water-n-alkane mixtures, reducing the interfacial tension of the liquid-liquid ternary system. The interfacial tension results agree quantitatively well for the range of concentrations of methanol studied. C1 Univ Tennessee, Dept Chem Engn, Knoxville, TN 37996 USA. Colorado Sch Mines, Dept Chem Engn, Golden, CO 80401 USA. Univ Tennessee, Dept Chem Chem Engn & CoOmp Sci, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Rivera, JL (reprint author), Univ Michoacana, Fac Ingn Quim, Morelia 58060, Michoacan, Mexico. EM jrivera@posgrado.fiq.umich.mx RI Rivera, Jose/A-2795-2008; McCabe, Clare/I-8017-2012; Cummings, Peter/B-8762-2013 OI Rivera, Jose/0000-0002-6985-7841; McCabe, Clare/0000-0002-8552-9135; Cummings, Peter/0000-0002-9766-2216 NR 42 TC 81 Z9 86 U1 8 U2 35 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JAN PY 2003 VL 67 IS 1 AR 011603 DI 10.1103/PhysRevE.67.011603 PN 1 PG 10 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 646CM UT WOS:000181017300039 PM 12636510 ER PT J AU Ryzhov, VN Stishov, SM AF Ryzhov, VN Stishov, SM TI Repulsive step potential: A model for a liquid-liquid phase transition SO PHYSICAL REVIEW E LA English DT Article ID SOLID-SOLID TRANSITIONS; CORE; EQUATION; SYSTEMS; FLUIDS; WATER AB In the framework of the perturbation theory for fluids we study the model with the isotropic repulsive step potential which in addition to the hard core has a repulsive soft core of a larger radius. It is shown that this purely repulsive potential is sufficient to explain a liquid-liquid phase transition and liquid anomalies. C1 Russian Acad Sci, Inst High Pressure Phys, Troitsk 142190, Moscow Reg, Russia. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Ryzhov, VN (reprint author), Russian Acad Sci, Inst High Pressure Phys, Troitsk 142190, Moscow Reg, Russia. RI Ryzhov, Valentin/A-4472-2017 OI Ryzhov, Valentin/0000-0002-1331-3984 NR 22 TC 34 Z9 35 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JAN PY 2003 VL 67 IS 1 AR 010201 DI 10.1103/PhysRevE67.010201 PN 1 PG 4 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 646CM UT WOS:000181017300004 PM 12636475 ER PT J AU Sapozhnikov, MV Aranson, IS Olafsen, JS AF Sapozhnikov, MV Aranson, IS Olafsen, JS TI Coarsening of granular clusters: Two types of scaling behaviors SO PHYSICAL REVIEW E LA English DT Article ID DYNAMICS; GASES; LAYER; DIFFUSION; PLASMAS; FRONT; MEDIA AB We report on an experimental study of small cluster dynamics during the coarsening process in driven granular submonolayers of 120-mum bronze particles. The techniques of electrostatic and vertical mechanical vibration were employed to excite the granular gas. We measure the scaling exponent for the evaporation of small clusters during coarsening. It was found that the surface area of small clusters S vs time t behaves as Ssimilar to(t(0)-t)(2/3) for lower frequencies and Ssimilar to(t(0)-t) for higher frequencies. We argue that the change in the scaling exponent is related to the transition from three-dimensional (3D) to 2D character of motion in the granular gas. C1 Argonne Natl Lab, Argonne, IL 60439 USA. Russian Acad Sci, Inst Phys Microstruct, Nizhnii Novgorod 603600, Russia. Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA. RP Sapozhnikov, MV (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Aranson, Igor/I-4060-2013 NR 22 TC 15 Z9 15 U1 0 U2 7 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JAN PY 2003 VL 67 IS 1 AR 010302 DI 10.1103/PhysRevE.67.010302 PN 1 PG 4 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 646CM UT WOS:000181017300007 PM 12636478 ER PT J AU Trombettoni, A Smerzi, A Bishop, AR AF Trombettoni, A Smerzi, A Bishop, AR TI Discrete nonlinear Schrodinger equation with defects SO PHYSICAL REVIEW E LA English DT Article ID BOSE-EINSTEIN CONDENSATION; WAVE-GUIDE ARRAYS; SOLITONS; OSCILLATIONS; BREATHERS; DYNAMICS; GASES AB We investigate the dynamical properties of the one-dimensional discrete nonlinear Schrodinger equation (DNLS) with periodic boundary conditions and with an arbitrary distribution of on-site defects. We study the propagation of a traveling plane wave with momentum k: the dynamics in Fourier space mainly involves two localized states with momenta +/-k (corresponding to a transmitted and a reflected wave). Within a two-mode ansatz in Fourier space, the dynamics of the system maps on a nonrigid pendulum Hamiltonian. The several analytically predicted (and numerically confirmed) regimes include states with a vanishing time average of the rotational states (implying complete reflections and refocusing of the incident wave), oscillations around fixed points (corresponding to quasi-stationary states), and, above a critical value of the nonlinearity, self-trapped states (with the wave traveling almost undisturbed through the impurity). We generalize this treatment to the case of several traveling waves and time-dependent defects. The validity of the two-mode ansatz and the continuum limit of the DNLS are discussed. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy. Univ Perugia, Sez INFN, I-06123 Perugia, Italy. RP Trombettoni, A (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. NR 27 TC 20 Z9 20 U1 1 U2 3 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 J9 PHYS REV E JI Phys. Rev. E PD JAN PY 2003 VL 67 IS 1 AR 016607 DI 10.1103/PhysRevE.67.016607 PN 2 PG 11 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 646CV UT WOS:000181018000082 PM 12636625 ER PT J AU Vanossi, A Roder, J Bishop, AR Bortolani, V AF Vanossi, A Roder, J Bishop, AR Bortolani, V TI Underdamped commensurate dynamics in a driven Frenkel-Kontorova-type model SO PHYSICAL REVIEW E LA English DT Article ID DRY FRICTION; TOMLINSON MODEL; CRYSTALS; SLIP AB The dynamics of a Frenkel-Kontorova chain subject to a substrate potential with a multiple-well structure and driven by an external dc force is studied in the underdamped regime. Making a rational choice among the three inherent length scales characterizing the system allows us to consider the possible formation of commensurate structures during sliding over the complex on-site potential. We comment both on the nature of the particle dynamics in the vicinity of the pinning-depinning transition point, and on the dynamical states displayed during the chain motion at different strengths of the dc driving. Varying the number of particles in the simulations allows us to consider, on a multiple-well substrate, the role played by the coverage variable on the depinning mechanism. The dependence of the minimal force required to initiate the chain motion (static friction) on the ratio of the model interaction strengths is analyzed and compared to the well-known case of the standard Frenkel-Kontorova model, which has only two inherent lengths. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. Univ Modena & Reggio Emilia, INFM S3, I-41100 Modena, Italy. Univ Modena & Reggio Emilia, Dipartimento Fis, I-41100 Modena, Italy. RP Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. NR 23 TC 24 Z9 24 U1 0 U2 0 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 2470-0045 EI 2470-0053 J9 PHYS REV E JI Phys. Rev. E PD JAN PY 2003 VL 67 IS 1 AR 016605 DI 10.1103/PhysRevE.67.016605 PN 2 PG 7 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 646CV UT WOS:000181018000080 PM 12636623 ER PT J AU Blaskiewicz, M Furman, MA Pivi, M Macek, RJ AF Blaskiewicz, M Furman, MA Pivi, M Macek, RJ TI Electron cloud instabilities in the proton storage ring and spallation neutron source SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID BEAM; PSR AB Electron cloud instabilities in the Los Alamos Proton Storage Ring and those foreseen for the Oak Ridge Spallation Neutron Source are examined theoretically, numerically, and experimentally. C1 Brookhaven Natl Lab, Collider Accelerator Dept, Upton, NY 11973 USA. Univ Calif Berkeley, Ctr Beam Phys, Div Accelerator & Fus Res, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Blaskiewicz, M (reprint author), Brookhaven Natl Lab, Collider Accelerator Dept, 911B, Upton, NY 11973 USA. NR 54 TC 20 Z9 20 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD JAN PY 2003 VL 6 IS 1 AR 014203 DI 10.1103/PhysRevSTAB.6.014203 PG 18 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 643WK UT WOS:000180885000008 ER PT J AU Davino, D Hahn, H AF Davino, D Hahn, H TI Improved analytical model of the transverse coupling impedance of ferrite kicker magnets SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB A transformer model of ferrite kicker magnets is presented in this paper. Based on this model, an equivalent circuit is derived for which the elements can be obtained by bench measurements or by estimates from the magnet geometry. Improved formulas for the transverse coupling impedance of lumped and traveling wave kicker magnets are derived from the model and the equivalent circuit. The formulas differ from the corresponding handbook results in their dependence on the external termination or aperture aspect, respectively. The effect of ferrite properties on the transverse coupling impedance is analyzed. The model was confirmed by bench measurements with the twin-wire technique made on the full-size and half-size prototypes of the extraction kicker of the SNS accumulator ring. The application of this model to the design of the kickers allowed a significant reduction of the SNS transverse coupling impedance budget. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Davino, D (reprint author), Univ Sannio, Dipartimento Ingn, Piazza Roma, I-82100 Benevento, Italy. RI Davino, Daniele/C-8763-2011; OI Davino, Daniele/0000-0002-7492-8173 NR 18 TC 10 Z9 10 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD JAN PY 2003 VL 6 IS 1 AR 012001 DI 10.1103/PhysRevSTAB.6.012001 PG 11 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 643WK UT WOS:000180885000003 ER PT J AU Grote, DP Henestroza, E Kwan, JW AF Grote, DP Henestroza, E Kwan, JW TI Design and simulation of a multibeamlet injector for a high current accelerator SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB A multibeamlet approach to a high current ion injector, whereby a large number of beamlets are accelerated and then merged to form a single beam, offers a number of potential advantages over a monolithic single beam injector. These advantages include a smaller transverse footprint, more control over the shaping and aiming of the beam, and more flexibility in the choice of ion sources. A potential drawback, however, is a larger emittance. In this paper, we seek to understand the merging of the beamlets and how it determines the emittance. When the constraints imposed by beam propagation physics and practical engineering issues are included, the design is reduced to a few free parameters. We describe the physics design of a multibeamlet injector and produce a design for an example set of parameters. Extensive use of 2D and 3D particle simulations was made in understanding the injector. Design tolerances and sensitivities are discussed in general and in relation to the example. C1 Lawrence Livermore Natl Lab, LLNL, Livermore, CA 94550 USA. Univ Calif Berkeley, LBNL, Berkeley, CA 94720 USA. RP Grote, DP (reprint author), Lawrence Livermore Natl Lab, LLNL, Livermore, CA 94550 USA. NR 11 TC 5 Z9 5 U1 1 U2 1 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD JAN PY 2003 VL 6 IS 1 AR 014202 DI 10.1103/PhysRevSTAB.6.014202 PG 12 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 643WK UT WOS:000180885000007 ER PT J AU Qin, H Startsev, EA Davidson, RC AF Qin, H Startsev, EA Davidson, RC TI Nonlinear perturbative particle simulation studies of the electron-proton two-stream instability in high intensity proton beams SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID PERIODIC FOCUSING FIELD; DELTA-F SIMULATION; STORAGE-RINGS; PROPAGATION; EQUATIONS; PSR AB Two-stream instabilities in intense charged particle beams, described self-consistently by the nonlinear Vlasov-Maxwell equations, are studied using a 3D multispecies perturbative particle simulation method The recently developed Beam Equilibrium, Stability and Transport code is used to simulate the linear and nonlinear properties of the electron-proton (e-p) two-stream instability observed in the Proton Storage Ring (PSR) experiment for a long, coasting beam Simulations in a parameter regime characteristic of the PSR experiment show that the e-p instability has a dipole-mode structure, and that the growth rate is an increasing function of beam intensity, but a decreasing function of the longitudinal momentum spread. It is also shown that the instability threshold decreases with increasing fractional charge neutralization and increases with increasing axial momentum spread of the beam particles. In the nonlinear phase, the simulations show that the proton density perturbation first saturates at a relatively low level and subsequently grows to a higher level. Finally, the nonlinear space-charge-induced transverse tune spread, which introduces a major growth-rate reduction effect on the e-p instability, is studied for self-consistent equilibrium populations of protons and electrons. C1 Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Qin, H (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 33 TC 30 Z9 30 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD JAN PY 2003 VL 6 IS 1 AR 014401 DI 10.1103/PhysRevSTAB.6.014401 PG 8 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 643WK UT WOS:000180885000011 ER PT J AU Wang, TSE Channell, PJ Macek, RJ Davidson, RC AF Wang, TSE Channell, PJ Macek, RJ Davidson, RC TI Centroid theory of transverse electron-proton two-stream instability in a long proton bunch SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB This paper presents an analytical investigation of the transverse electron-proton (e-p) two-stream instability in a proton bunch propagating through a stationary electron background. The equations of motion, including damping effects, are derived for the centroids of the proton beam and the electron cloud by considering Lorentzian and Gaussian frequency spreads for the particles. For a Lorentzian frequency distribution, we derive the asymptotic solution of the coupled linear centroid equations in the time domain and study the e-p instability in proton bunches with nonuniform line densities. Examples are given for both uniform and parabolic proton line densities. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Wang, TSE (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 34 TC 15 Z9 15 U1 0 U2 0 PU AMERICAN PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD JAN PY 2003 VL 6 IS 1 AR 014204 DI 10.1103/PhysRevSTAB.6.014204 PG 17 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 643WK UT WOS:000180885000009 ER PT B AU Schmerge, JF AF Schmerge, JF BE Rosenzweig, J TI Summary for working group A on high brightness beam production SO PHYSICS AND APPLICATIONS OF HIGH BRIGHTNESS ELECTRON BEAMS LA English DT Proceedings Paper CT Workshop on Physics and Applications of High Brightness Electron Beams CY JUL 01-06, 2002 CL Chia Laguna, ITALY SP ICFA AB Working group A was devoted to high brightness beam production and characterization. The presentations and discussions could be categorized as cathode physics, new photoinjector designs, computational modeling of high brightness beams, and new experimental methods and results. Several novel injector and cathode designs were presented. However, a standard 1.5 cell rf photoinjector is still the most common source for high brightness beams. New experimental results and techniques were presented and thoroughly discussed. The brightest beam produced in a rf photoinjector published at the time of the workshop is approximately 2 101 A/(m-rad)(2) at Sumitomo Heavy Industries in Japan with 1 nC of charge, a 9 ps FWHM long laser pulse and a normalized transverse emittance of 1.2 mu m. The emittance was achieved by utilizing a temporally flat laser pulse which decreased the emittance by an estimated factor of 2 from the beam produced with a Gaussian pulse shape with an identical pulse length. C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RP Schmerge, JF (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. NR 9 TC 1 Z9 1 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA PO BOX 128 FARRER RD, SINGAPORE 9128, SINGAPORE BN 981-238-726-9 PY 2003 BP 3 EP 19 DI 10.1142/9789812705235_0001 PG 17 WC Optics; Physics, Fluids & Plasmas; Physics, Particles & Fields SC Optics; Physics GA BCM50 UT WOS:000230000000001 ER PT B AU Schmerge, JF Bolton, PR Clendenin, JE Dowell, DH Gierman, SM Limborg, CG Murphy, BF AF Schmerge, JF Bolton, PR Clendenin, JE Dowell, DH Gierman, SM Limborg, CG Murphy, BF BE Rosenzweig, J TI 6D phase space measurements at the SLAC gun test facility SO PHYSICS AND APPLICATIONS OF HIGH BRIGHTNESS ELECTRON BEAMS LA English DT Proceedings Paper CT Workshop on Physics and Applications of High Brightness Electron Beams CY JUL 01-06, 2002 CL Chia Laguna, ITALY SP ICFA ID EMITTANCE MEASUREMENTS AB Proposed fourth generation light sources using SASE FELs to generate short pulse, coherent, X-rays require demonstration of high brightness electron sources. The Gun Test Facility (GTF) at SLAC was built to test high brightness sources for the proposed Linac Coherent Light Source at SLAC. The GTF is composed of an S-band photocathode rf gun with a Cu cathode, emittance compensating solenoid, single 3 m SLAC linac section and e-beam diagnostic section with a UV drive laser system. The longitudinal emittance exiting the gun has been determined by measuring the energy spectrum downstream of the linac as a function of the hnac phase. The e-beam pulse width, correlated and uncorrelated energy spread at the linac entrance have been fit to the measured energy spectra using a least square error fitting routine. The fit yields a pulse width of 2.9 ps FWHM for a 4.3 ps FWHM laser pulsewidth and 2% rms correlated energy spread with 0.07% rms uncorrelated energy spread. The correlated energy spread is enhanced in the linac to allow slice emittance measurements by conducting a quadrupole scan in a dispersive section. The normalized slice emittance has been measured to be as low as 2 mm-mrad for beams with peak currents up to 150 A (300 pC with a laser pulse length of 1.8 ps) while the full projected emittance is 3 mm-mrad. C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RP Schmerge, JF (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA PO BOX 128 FARRER RD, SINGAPORE 9128, SINGAPORE BN 981-238-726-9 PY 2003 BP 158 EP 168 DI 10.1142/9789812705235_0009 PG 11 WC Optics; Physics, Fluids & Plasmas; Physics, Particles & Fields SC Optics; Physics GA BCM50 UT WOS:000230000000009 ER PT B AU Anderson, S Limberg, T AF Anderson, S Limberg, T BE Rosenzweig, J TI Working group B summary: Collective effects and instabilities during electron beam pulse compression SO PHYSICS AND APPLICATIONS OF HIGH BRIGHTNESS ELECTRON BEAMS LA English DT Proceedings Paper CT Workshop on Physics and Applications of High Brightness Electron Beams CY JUL 01-06, 2002 CL Chia Laguna, ITALY SP ICFA AB In working group B, the implications that collective effects have on the process of pulse compression were discussed. Various physical effects, from space-charge to coherent synchrotron radiation were examined, in the context of diverse scenarios ranging from magnetic pulse compression to velocity bunching. A particular emphasis was placed on computational results, with some notable new results. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Anderson, S (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA PO BOX 128 FARRER RD, SINGAPORE 9128, SINGAPORE BN 981-238-726-9 PY 2003 BP 209 EP 213 DI 10.1142/9789812705235_0014 PG 5 WC Optics; Physics, Fluids & Plasmas; Physics, Particles & Fields SC Optics; Physics GA BCM50 UT WOS:000230000000014 ER PT B AU Ng, KY Lee, SY Zhang, YK AF Ng, KY Lee, SY Zhang, YK BE Rosenzweig, J TI Comments on optical stochastic cooling SO PHYSICS AND APPLICATIONS OF HIGH BRIGHTNESS ELECTRON BEAMS LA English DT Proceedings Paper CT Workshop on Physics and Applications of High Brightness Electron Beams CY JUL 01-06, 2002 CL Chia Laguna, ITALY SP ICFA AB An important necessary condition for transverse phase space damping in the optical stochastic cooling with transit-time method is derived. The longitudinal and transverse damping dynamics for the optical stochastic cooling is studied. We also obtain an optimal laser focusing condition for laser-beam interaction in the correction undulator. The amplification factor and the output peak power of the laser amplifier are found to differ substantially from earlier publications. The required power is large for hadron colliders at very high energy. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Ng, KY (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 6 TC 0 Z9 0 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA PO BOX 128 FARRER RD, SINGAPORE 9128, SINGAPORE BN 981-238-726-9 PY 2003 BP 248 EP 261 DI 10.1142/9789812705235_0017 PG 14 WC Optics; Physics, Fluids & Plasmas; Physics, Particles & Fields SC Optics; Physics GA BCM50 UT WOS:000230000000017 ER PT B AU Venturini, M Warnock, R Ruth, R AF Venturini, M Warnock, R Ruth, R BE Rosenzweig, J TI Coherent synchrotron radiation in storage rings SO PHYSICS AND APPLICATIONS OF HIGH BRIGHTNESS ELECTRON BEAMS LA English DT Proceedings Paper CT Workshop on Physics and Applications of High Brightness Electron Beams CY JUL 01-06, 2002 CL Chia Laguna, ITALY SP ICFA AB We take a detour from the main theme of this volume and present a discussion of coherent synchrotron radiation (CSR) in the context of storage rings rather than single-pass systems. Interest in this topic has been revived by a series of measurements carried out at several light source facilities. There is strong evidence that the observed coherent signal is accompanied by a beam instability, possibly driven by CSR itself. In this paper we review a "self-consistent" model of longitudinal beam dynamics in which CSR is the only agent of collective forces. The model yields numerical solutions that appear to reproduce the main features of the observations. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Venturini, M (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. NR 33 TC 0 Z9 0 U1 1 U2 1 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA PO BOX 128 FARRER RD, SINGAPORE 9128, SINGAPORE BN 981-238-726-9 PY 2003 BP 292 EP 303 DI 10.1142/9789812705235_0020 PG 12 WC Optics; Physics, Fluids & Plasmas; Physics, Particles & Fields SC Optics; Physics GA BCM50 UT WOS:000230000000020 ER PT B AU Nuhn, HD AF Nuhn, HD BE Rosenzweig, J TI Working group C summary SO PHYSICS AND APPLICATIONS OF HIGH BRIGHTNESS ELECTRON BEAMS LA English DT Proceedings Paper CT Workshop on Physics and Applications of High Brightness Electron Beams CY JUL 01-06, 2002 CL Chia Laguna, ITALY SP ICFA AB Working group C, "Application to FELs," of the Joint ICFA Advanced Accelerator and Beam Dynamics Workshop on July 1-6, 2002 in Chia Laguna, Sardinia, Italy addressed a total of nine topics. This summary will discuss the topics that were addressed in the stand-alone sessions, including Start-To-End Simulations, SASE Experiment, PERSEO, "Optics Free" FEL Oscillators, and VISA II. C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94325 USA. RP Nuhn, HD (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94325 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA PO BOX 128 FARRER RD, SINGAPORE 9128, SINGAPORE BN 981-238-726-9 PY 2003 BP 307 EP 319 DI 10.1142/9789812705235_0021 PG 13 WC Optics; Physics, Fluids & Plasmas; Physics, Particles & Fields SC Optics; Physics GA BCM50 UT WOS:000230000000021 ER PT B AU Le Sage, G Anderson, S Brown, W Barty, C Cauble, R Crane, J Cynn, H Ebbers, C Fittinghoff, D Gibson, D Hartemann, F Jovanovich, I Kuba, J Mcmahan, A Minich, R Moriarty, J Remington, B Slaughter, D Springer, P Steitz, FH Tremaine, A Yoo, CS Rosenzweig, J Ditmire, T AF Le Sage, G Anderson, S Brown, W Barty, C Cauble, R Crane, J Cynn, H Ebbers, C Fittinghoff, D Gibson, D Hartemann, F Jovanovich, I Kuba, J Mcmahan, A Minich, R Moriarty, J Remington, B Slaughter, D Springer, P Steitz, FH Tremaine, A Yoo, CS Rosenzweig, J Ditmire, T BE Rosenzweig, J TI Ultrafast materials probing with the LLNL Thomson X-ray source SO PHYSICS AND APPLICATIONS OF HIGH BRIGHTNESS ELECTRON BEAMS LA English DT Proceedings Paper CT Workshop on Physics and Applications of High Brightness Electron Beams CY JUL 01-06, 2002 CL Chia Laguna, ITALY SP ICFA ID LASER-PULSES; DIFFRACTION; SCATTERING; DYNAMICS; BEAMS; TOOL AB The use of short laser pulses to generate high peak intensity, ultra-short x-ray pulses enables experimental capabilities that are otherwise unattainable. In principle, femtosecond-scale pump-probe experiments can be used to temporally resolve structural dynamics of materials on the time scale of atomic motion. Current research at Lawrence Livermore National Laboratory is leading toward such a novel x-ray source. The system is based on a low emittance photoinjector, a 100 MeV electron RF linac, and a 300 mJ, 35 fs solid-state laser system. The Thomson source will produce ultra-fast pulses with x-ray energies capable of probing into high-Z metals. A wide range of material and plasma physics studies with unprecedented time resolution will become possible. C1 LLNL, Livermore, CA 94550 USA. RP Le Sage, G (reprint author), LLNL, Livermore, CA 94550 USA. NR 13 TC 2 Z9 2 U1 0 U2 2 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA PO BOX 128 FARRER RD, SINGAPORE 9128, SINGAPORE BN 981-238-726-9 PY 2003 BP 320 EP 327 DI 10.1142/9789812705235_0022 PG 8 WC Optics; Physics, Fluids & Plasmas; Physics, Particles & Fields SC Optics; Physics GA BCM50 UT WOS:000230000000022 ER PT S AU Gass, FR Dohner, JL Spahn, OB Garcia, EJ Grossetete, GD AF Gass, FR Dohner, JL Spahn, OB Garcia, EJ Grossetete, GD BE Osinski, M Amano, H Blood, P TI An investigation into the response of a micro electro mechanical compound pivot mirror using finite element modeling SO PHYSICS AND SIMULATION OF OPTOELECTRONIC DEVICES XI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Physics and Simulation of Optoelectronic Devices XI CY JAN 27-31, 2003 CL SAN JOSE, CA SP SPIE AB This report presents modeling and simulation work for analyzing three designs of Micro Electro Mechanical Systems (MEMS) Compound Pivot Mirrors (CPM). These mirrors were made using the polysilicon SUMMi(TM) process. At 75 volts and above, initial experimental analysis of fabricated mirrors showed tilt angles of up to 7.5 degrees for one design, and 5 degrees for the other two. Nevertheless, geometric design models predicted higher tilt angles. Therefore, a detailed finite element modeling study was conducted to explain why lower tilt angles occurred and if design modifications could be made to produce higher tilt angles at lower voltages. This study showed that the spring stiffness of the mirrors was too great to allow for desired levels of rotation at lower levels of voltage. To create lower spring stiffness, a redesign is needed. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Gass, FR (reprint author), Sandia Natl Labs, POB 5800 MS 0603, Albuquerque, NM 87185 USA. NR 7 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 0-8194-4786-2 J9 P SOC PHOTO-OPT INS PY 2003 VL 4986 BP 645 EP 653 DI 10.1117/12.473200 PG 9 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA BX33D UT WOS:000184964500067 ER PT J AU Kozlenko, NG Abaev, VV Bekrenev, VS Kruglov, SP Koulbardis, AA Lopatin, IV Starostin, AB Draper, B Hayden, S Huddleston, J Isenhower, D Robinson, C Sadler, M Allgower, C Cadman, R Spinka, H Comfort, J Craig, K Ramirez, A Kycia, T Clajus, M Marusic, A McDonald, S Nefkens, BMK Phaisangittisakul, N Prakhov, S Price, JW Tippens, WB Peterson, J Briscoe, WJ Shafi, A Strakovsky, II Staudenmaier, H Manley, DM Olmsted, J Peaslee, D Knecht, N Lolos, G Papandreou, Z Supek, I Slaus, I Gibson, A Grosnic, D Koetke, D Manweiler, R Stanislaus, S AF Kozlenko, NG Abaev, VV Bekrenev, VS Kruglov, SP Koulbardis, AA Lopatin, IV Starostin, AB Draper, B Hayden, S Huddleston, J Isenhower, D Robinson, C Sadler, M Allgower, C Cadman, R Spinka, H Comfort, J Craig, K Ramirez, A Kycia, T Clajus, M Marusic, A McDonald, S Nefkens, BMK Phaisangittisakul, N Prakhov, S Price, JW Tippens, WB Peterson, J Briscoe, WJ Shafi, A Strakovsky, II Staudenmaier, H Manley, DM Olmsted, J Peaslee, D Knecht, N Lolos, G Papandreou, Z Supek, I Slaus, I Gibson, A Grosnic, D Koetke, D Manweiler, R Stanislaus, S TI Measurement of the total and differential cross sections for the reaction pi(-)p -> eta n with the crystal ball detector SO PHYSICS OF ATOMIC NUCLEI LA English DT Article ID MESONS; MEV/C AB The first results obtained in 1998 by the Crystal Ball collaboration from a measurement of the total and differential cross sections for the reaction pi(-)p --> etan are presented. These new experimental results for the total cross sections are compared with the predictions of the K-matrix model for pion-nucleon scattering. The angular distribution at momenta near the reaction threshold (685 MeV/c) is determined by the S-wave contribution. The P-wave contribution begins to manifest itself from a momentum of 720 MeV/c. (C) 2003MAIK"Nauka/lnterperiodica". C1 Russian Acad Sci, Petersburg Nucl Phys Inst, Gatchina 188350, Russia. Univ Calif Los Angeles, Los Angeles, CA 90095 USA. Abilene Christian Univ, ACU Stn, Abilene, TX 79699 USA. Argonne Natl Lab, Argonne, IL 60439 USA. Arizona State Univ, Tempe, AZ 85287 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. Univ Colorado, Colorado Springs, CO 80309 USA. George Washington Univ, Washington, DC 20052 USA. Univ Karlsruhe, D-76128 Karlsruhe, Germany. Kent State Univ, Kent, OH 44242 USA. Univ Maryland, College Pk, MD 20742 USA. Univ Regina, Regina, SK S4S 0A2, Canada. Rudjer Boskovic Inst, HR-10001 Zagreb, Croatia. Valparaiso Univ, Valparaiso, IN 46383 USA. RP Kozlenko, NG (reprint author), Russian Acad Sci, Petersburg Nucl Phys Inst, Gatchina 188350, Russia. EM kozlenko@pnpi.spb.ru NR 9 TC 8 Z9 8 U1 0 U2 0 PU MAIK NAUKA/INTERPERIODICA/SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013-1578 USA SN 1063-7788 J9 PHYS ATOM NUCL+ JI Phys. Atom. Nuclei PD JAN PY 2003 VL 66 IS 1 BP 110 EP 113 DI 10.1134/1.1540664 PG 4 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 645XW UT WOS:000181006600014 ER PT J AU Silbert, LE Landry, JW Grest, GS AF Silbert, LE Landry, JW Grest, GS TI Granular flow down a rough inclined plane: Transition between thin and thick piles SO PHYSICS OF FLUIDS LA English DT Article ID SURFACE FLOW; CHUTE FLOW; AVALANCHES; DYNAMICS; SPHERES; MODEL; EQUILIBRIUM; ASSEMBLIES; SIMULATION; EQUATIONS AB The rheology of granular particles in an inclined plane geometry is studied using three dimensional molecular dynamics simulations. The flow-no-flow boundary is determined for piles of varying heights over a range of inclination angles theta. Three angles determine the phase diagram: theta(r), the angle of repose, is the angle at which a flowing system comes to rest; theta(m), the maximum angle of stability, is the inclination required to induce flow in a static system; and theta(max) is the maximum angle for which stable, steady state flow is observed. In the stable flow region theta(r), <θ > theta(r) : Bagnold rheology, characterized by a mean particle velocity v(x) in the direction of flow that scales as nu(x)proportional toh(3/2), for a pile of height h, (ii) theta greater than or similar to theta(r) : The slow flow regime, characterized by a linear velocity profile with depth, and (iii) theta approximate to theta(r) : Avalanche flow characterized by a slow underlying creep motion combined with occasional free surface events and large energy fluctuations. We also probe the physics of the initiation and cessation of flow. The results are compared to several recent experimental studies on chute flows and suggest that differences between measured velocity profiles in these experiments may simply be a consequence of how far the system is from jamming. (C) 2003 American Institute of Physics. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Silbert, LE (reprint author), Univ Chicago, James Franck Inst, 5640 S Ellis Ave, Chicago, IL 60637 USA. NR 45 TC 79 Z9 83 U1 2 U2 12 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-6631 J9 PHYS FLUIDS JI Phys. Fluids PD JAN PY 2003 VL 15 IS 1 BP 1 EP 10 DI 10.1063/1.1521719 PG 10 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA 624RF UT WOS:000179774200005 ER PT J AU Geurts, BJ Holm, DD AF Geurts, BJ Holm, DD TI Regularization modeling for large-eddy simulation SO PHYSICS OF FLUIDS LA English DT Article ID MIXING LAYER; TURBULENCE AB A new modeling approach for large-eddy simulation (LES) is obtained by combining a "regularization principle'' with an explicit filter and its inversion. This regularization approach allows a systematic derivation of the implied subgrid model, which resolves the closure problem. The central role of the filter in LES is fully restored, i.e., both the interpretation of LES predictions in terms of direct simulation results as well as the corresponding subgrid closure are specified by the filter. The regularization approach is illustrated with "Leray-smoothing'' of the nonlinear convective terms. In turbulent mixing the new, implied subgrid model performs favorably compared to the dynamic eddy-viscosity procedure. The model is robust at arbitrarily high Reynolds numbers and correctly predicts self-similar turbulent flow development. (C) 2003 American Institute of Physics. C1 Univ Twente, Fac Math Sci, JM Burgers Ctr, NL-7500 AE Enschede, Netherlands. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. RP Geurts, BJ (reprint author), Univ Twente, Fac Math Sci, JM Burgers Ctr, POB 217, NL-7500 AE Enschede, Netherlands. OI Holm, Darryl D/0000-0001-6362-9912 NR 13 TC 105 Z9 106 U1 1 U2 3 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-6631 J9 PHYS FLUIDS JI Phys. Fluids PD JAN PY 2003 VL 15 IS 1 BP L13 EP L16 DI 10.1063/1.1529180 PG 4 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA 624RF UT WOS:000179774200004 ER PT J AU Kline, JL Scime, EE AF Kline, JL Scime, EE TI Parametric decay instabilities in the HELIX helicon plasma source SO PHYSICS OF PLASMAS LA English DT Article ID ION TEMPERATURE ANISOTROPY; FREQUENCY; WAVES; DISCHARGE; MODES; PHYSICS; PROBE AB Parametric decay of the electromagnetic helicon pump wave into two electrostatic waves, thought to be a lower hybrid wave and an ion acoustic wave, is observed. The parametric excitation of the electrostatic waves is strongest near the axis of the helicon source. The parametrically excited wave amplitudes can be as large as 8% of the pump wave amplitude. Thus, efficient coupling between the parametrically excited waves and plasma particles (ions and electrons) can lead to enhanced plasma densities, electron temperatures, and ion temperatures. A correlation between the lower hybrid wave and electron temperatures and a correlation between the ion acoustic wave and ion temperatures near the antenna are observed. (C) 2003 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. W Virginia Univ, Dept Phys, Morgantown, WV 26506 USA. RP Kline, JL (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 34 TC 26 Z9 26 U1 1 U2 4 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD JAN PY 2003 VL 10 IS 1 BP 135 EP 144 DI 10.1063/1.1528182 PG 10 WC Physics, Fluids & Plasmas SC Physics GA 632ZB UT WOS:000180253800016 ER PT J AU Slutz, SA Herrmann, MC AF Slutz, SA Herrmann, MC TI Radiation driven capsules for fast ignition fusion SO PHYSICS OF PLASMAS LA English DT Article ID INERTIAL CONFINEMENT FUSION; TARGETS; ENERGY; ELECTRON; TRITIUM; LASERS; GAIN AB The energy required to ignite compressed deuterium-tritium fuel decreases strongly with fuel density. Thermal radiation is an effective way of driving inertial fusion capsules to high density. The achievable fuel density increases with peak radiation temperature, since the ablation pressure depends strongly on the radiation temperature. Through a series of detailed numerical simulations, peak fuel densities have been calculated as a function of the peak radiation drive temperature. In these calculations, the time dependence of the radiation temperature has been optimized to obtain maximum density for each scaling point. These results are then used with the fast ignition scaling of Atzeni [S. Atzeni, Phys. Plasmas 6, 3316 (1999)] to obtain ignition energy as peak drive temperature. (C) 2003 American Institute of Physics. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Slutz, SA (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 17 TC 19 Z9 20 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD JAN PY 2003 VL 10 IS 1 BP 234 EP 240 DI 10.1063/1.1530580 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 632ZB UT WOS:000180253800027 ER PT J AU Albright, BJ Cowley, SC AF Albright, BJ Cowley, SC TI Shear Alfven resonances in line-tied geometries near magnetic neutral lines and nulls SO PHYSICS OF PLASMAS LA English DT Article ID CORONAL LOOPS; RECONNECTION; FIELDS; POINTS; WAVES; DISSIPATION; ABSORPTION; MODEL AB One of the outstanding challenges of solar physics is understanding the mechanism for heating the solar corona, a low-beta, low-resistivity plasma driven slowly by the shuffling of "footpoints" (ends of flux tubes) anchored in the photosphere. The corona's low resistivity means that enormous current densities must be present for Ohmic dissipation to be effective. Two ways that this can occur in a slowly evolving, "quasiequilibrium" medium are by the formation of current sheets or by the excitation of very low-frequency Alfven resonances. Both processes lead to singular current densities in the ideal limit, and both may result from the excitation of very low- (or zero-) frequency shear Alfven resonances. Thus, understanding the conditions under which zero-frequency Alfven resonances can occur may ultimately be important in understanding coronal heating. This paper examines shear Alfven resonances in line-tied magnetic geometries, with special attention being paid to geometries with discontinuities in the field line mapping as candidates for having zero-frequency Alfven resonances. Two such geometries have been examined in detail: a two-dimensional X-point and a three-dimensional magnetic null. Qualitative differences in the two spectra are observed. The X-point geometry has Alfven resonances of vanishing frequency, whereas the magnetic null geometry has a finite cutoff in resonant frequency for all field lines in the system. The Alfven continuum for a null depends on its geometry, however, and much lower (though still nonzero) resonant frequencies are found when the flux surfaces are moderately eccentric. Consequently, a subset of magnetic nulls in complex, line tied geometries may have flux surfaces that can be driven resonantly by a driver of much lower frequency than for similar media without nulls. To the extent that nulls are generic features of complex magnetic geometries {and there is some reason to suspect that they are [Albright, Phys. Plasmas 6, 4222 (1999)]} this result may resolve one of the unsettled difficulties with Alfven heating models of the solar corona. (C) 2003 American Institute of Physics. C1 Los Alamos Natl Lab, Div Appl Phys, Plasma Phys Grp, Los Alamos, NM 87545 USA. Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Plasma Phys Grp, London SW7 2BW, England. RP Albright, BJ (reprint author), Los Alamos Natl Lab, Div Appl Phys, Plasma Phys Grp, MS B259, Los Alamos, NM 87545 USA. NR 31 TC 0 Z9 0 U1 0 U2 0 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD JAN PY 2003 VL 10 IS 1 BP 241 EP 248 DI 10.1063/1.1525410 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 632ZB UT WOS:000180253800028 ER PT J AU Vermare, C Davis, HA Moir, DC Hughes, TP AF Vermare, C Davis, HA Moir, DC Hughes, TP TI Ion emission from solid surfaces induced by intense electron beam impact SO PHYSICS OF PLASMAS LA English DT Article ID IONIZATION CROSS-SECTIONS; TARGET; SPOT AB Ions or ionized neutrals released from solid surfaces by electron beam impact can be accelerated and trapped in the beam potential causing beam disruption, Experiments have been performed on the DARHT-I accelerator (1.7 kA. 19.8 MeV. 60 ns) to study this phenomenon. The beam, focused to a range of diameters, was transmitted through thin targets made of various materials. The time evolution of the beam radial profile was measured downstream of the target. For low current density, the downstream-beam radial profile was time invariant as expected for a pure electron beam. At higher current density. the downstream beam was clearly disrupted during the pulse followed by a large-amplitude transverse centroid instability. Two-dimensional calculations using the Lsp particle-in-cell code show that if the space-charge-limiting ion current is allowed to flow after the target surface temperature increases by about 400 K, the main features of the experimental observations are replicated. Three-dimensional Lsp calculations show growth of the ion hose instability at a frequency close to that observed in the experiments. (C) 2003 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Mission Res Corp, Albuquerque, NM 87110 USA. RP Vermare, C (reprint author), CEA, DAM Polygone Expt Moronvilliers, F-51490 Pontfaverger, Moronvilliers, France. NR 26 TC 14 Z9 15 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD JAN PY 2003 VL 10 IS 1 BP 277 EP 284 DI 10.1063/1.1527629 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 632ZB UT WOS:000180253800032 ER PT J AU Schroeder, CB Esarey, E Shadwick, BA Leemans, WP AF Schroeder, CB Esarey, E Shadwick, BA Leemans, WP TI Raman forward scattering of chirped laser pulses SO PHYSICS OF PLASMAS LA English DT Article ID ELECTRON ACCELERATION; PLASMA INTERACTIONS; SELF-MODULATION; TENUOUS PLASMAS; INSTABILITIES; PROPAGATION; IONIZATION; GENERATION; CHANNELS AB Raman scattering of a high-intensity, short-duration, frequency-chirped laser pulse propagating in an underdense plasma is examined. The growth of the direct forward scattered light is calculated for a laser pulse with a linear frequency chirp in various spatiotemporal regimes. This includes a previously undescribed regime of strongly coupled four-wave nonresonant interaction, which is important for relativistic laser intensities. In all regimes of forward scattering, it is shown that the growth rate increases (decreases) for positive (negative) frequency chirp. The effect of chirp on the growth rate is relatively minor, i.e., a few percent chirp yields few percent changes in the growth rates. Numerical solutions based on a fully nonlinear cold Maxwell-fluid model are presented which confirm analytical predictions. Relation of these results to recent experiments is discussed. (C) 2003 American Institute of Physics. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Schroeder, CB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. OI Schroeder, Carl/0000-0002-9610-0166 NR 31 TC 16 Z9 17 U1 0 U2 6 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD JAN PY 2003 VL 10 IS 1 BP 285 EP 295 DI 10.1063/1.1528901 PG 11 WC Physics, Fluids & Plasmas SC Physics GA 632ZB UT WOS:000180253800033 ER PT J AU Trintchouk, F Yamada, M Ji, H Kulsrud, RM Carter, TA AF Trintchouk, F Yamada, M Ji, H Kulsrud, RM Carter, TA TI Measurement of the transverse Spitzer resistivity during collisional magnetic reconnection SO PHYSICS OF PLASMAS LA English DT Article AB Measurement of the transverse resistivity was carried out in a reconnecting current sheet where the mean free path for the Coulomb collision is smaller than the thickness of the sheet. In a collisional neutral sheet without a guide field. the transverse resistivity is directly related to the reconnection rate. A remarkable agreement is found between the measured resistivity and the classical value derived by Spitzer. In his calculation the transverse resistivity for the electrons is higher than the parallel resistivity by a factor of 1.96. The measured values have verified this theory to within 30% errors. (C) 2003 American Institute of Physics. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Trintchouk, F (reprint author), Cymer Inc, San Diego, CA 92127 USA. RI Carter, Troy/E-7090-2010; Yamada, Masaaki/D-7824-2015 OI Carter, Troy/0000-0002-5741-0495; Yamada, Masaaki/0000-0003-4996-1649 NR 9 TC 37 Z9 37 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1070-664X J9 PHYS PLASMAS JI Phys. Plasmas PD JAN PY 2003 VL 10 IS 1 BP 319 EP 322 DI 10.1063/1.1528612 PG 4 WC Physics, Fluids & Plasmas SC Physics GA 632ZB UT WOS:000180253800039 ER PT S AU Zunger, A AF Zunger, A BE Long, AR Davies, JH TI Unusual physics in III-V alloys: Spontaneous ordering and wavefunction localization SO PHYSICS OF SEMICONDUCTORS 2002, PROCEEDINGS SE INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article; Proceedings Paper CT 3rd International Conference on Particle Physics Beyond the Standard Model CY JUN 02-07, 2002 CL Oulu, FINLAND ID VAPOR-PHASE EPITAXY; LONG-RANGE ORDER; RESONANT RAMAN-SCATTERING; ELECTRON EFFECTIVE-MASS; MOLECULAR-BEAM EPITAXY; SEMICONDUCTOR ALLOYS; NITROGEN PAIRS; SPECTROSCOPIC ELLIPSOMETRY; OPTICAL-TRANSITIONS; PRESSURE-DEPENDENCE AB Conventional A(1-x)B(x) semiconductor alloys are naturally random, have small "bowing coefficients" and exhibit extended wave functions, almost like those of the parent compounds A and B. This paper focuses on two novel types of alloy behaviors, discovered recently, which are different from the above expectations of "virtual zincblende" behavior. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Zunger, A (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. RI Zunger, Alex/A-6733-2013 NR 70 TC 0 Z9 0 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 BN 0-7503-0924-5 J9 INST PHYS CONF SER PY 2003 VL 171 BP 47 EP 59 PG 13 WC Physics, Multidisciplinary; Physics, Condensed Matter SC Physics GA BAN32 UT WOS:000222945600006 ER PT S AU Walukiewicz, W AF Walukiewicz, W BE Long, AR Davies, JH TI Band anticrossing in highly mismatched semiconductor alloys SO PHYSICS OF SEMICONDUCTORS 2002, PROCEEDINGS SE INSTITUTE OF PHYSICS CONFERENCE SERIES LA English DT Article; Proceedings Paper CT 3rd International Conference on Particle Physics Beyond the Standard Model CY JUN 02-07, 2002 CL Oulu, FINLAND ID ELECTRON EFFECTIVE-MASS; QUANTUM-WELLS; GAP REDUCTION; NITROGEN; GAASN; ELECTRONEGATIVITY; ABSORPTION; PRESSURE; ENERGY; STATES AB The basic theoretical aspects of the band anticrossing effects in highly electronegativity-mismatched semiconductor alloys are reviewed. The many-impurity Anderson model treated in the coherent potential approximation is applied to the semiconductor alloys, in which metallic anion atoms are partially substituted by atoms of a highly electronegative element. Analytical solutions for the Green's function describe dispersion relations and state broadening effects for the restructured conduction band. The solutions are identical to those obtained from the physically intuitive and widely used two-level band anticrossing model. It is shown that the model explains key experimental observations including the unusual composition and pressure dependence of the interband optical transitions and the large enhancement of the electron effective mass. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA. RP Walukiewicz, W (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA. NR 41 TC 1 Z9 1 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0951-3248 BN 0-7503-0924-5 J9 INST PHYS CONF SER PY 2003 VL 171 BP 109 EP 116 PG 8 WC Physics, Multidisciplinary; Physics, Condensed Matter SC Physics GA BAN32 UT WOS:000222945600013 ER PT J AU Kardashev, BK Smirnov, BI Singh, D Goretta, KC de Arellano-Lopez, AR AF Kardashev, BK Smirnov, BI Singh, D Goretta, KC de Arellano-Lopez, AR TI Internal friction and Young's modulus of Si3N4/BN fibrous monoliths at various vibrational strain amplitudes SO PHYSICS OF THE SOLID STATE LA English DT Article ID NITRIDE; CERAMICS; INELASTICITY; TEMPERATURE; ELASTICITY AB The effect of temperature and vibrational strain amplitude on Young's modulus and an ultrasound damping (internal friction) of ceramic boron nitride samples and silicon nitride/boron nitride fibrous monoliths was studied. It was shown that the elastic moduli and the elastic vibration decrement of the low-modulus BN ceramic and of the high-modulus Si3N4/BN monoliths measured at small strain amplitudes (in the region of amplitude-independent internal friction) exhibit a noticeable temperature hysteresis. Temperature exerts the smallest effect on the amplitude-independent decrement and on the amplitude-dependent damping and Young's modulus defect of a monolith whose filaments are arranged both along and perpendicular to the axis of a rod-shaped sample. These parameters behave in the most complicated way in a sample with all its filaments aligned with the rod axis. The observed relations can be assigned to structural features of the monoliths and the considerable influence of transverse strain on the evolution of defect structure in the materials studied. (C) 2003 MAIK "Nauka/Interperiodica". C1 Russian Acad Sci, AF Ioffe Physicotech Inst, St Petersburg 194021, Russia. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Sevilla, E-41080 Seville, Spain. RP Kardashev, BK (reprint author), Russian Acad Sci, AF Ioffe Physicotech Inst, Politekhnicheskaya Ul 26, St Petersburg 194021, Russia. EM b.kardashev@mail.ioffe.ru RI Kardashev, Boris/D-2118-2014; OI R. de Arellano Lopez, Antonio/0000-0002-7443-0244 NR 10 TC 2 Z9 2 U1 0 U2 2 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 1063-7834 J9 PHYS SOLID STATE+ JI Phys. Solid State PY 2003 VL 45 IS 3 BP 477 EP 481 DI 10.1134/1.1562233 PG 5 WC Physics, Condensed Matter SC Physics GA 657LN UT WOS:000181668800013 ER PT J AU Trilling, G AF Trilling, G TI Crisis in physics spurs spirited dialogue SO PHYSICS TODAY LA English DT Letter C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Trilling, G (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD JAN PY 2003 VL 56 IS 1 BP 12 EP 12 DI 10.1063/1.1554121 PG 1 WC Physics, Multidisciplinary SC Physics GA 631WU UT WOS:000180191000002 ER PT J AU Jovanovic, D AF Jovanovic, D TI Crisis in physics spurs spirited dialogue SO PHYSICS TODAY LA English DT Letter C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Jovanovic, D (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 0 TC 0 Z9 0 U1 0 U2 1 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD JAN PY 2003 VL 56 IS 1 BP 13 EP + PG 2 WC Physics, Multidisciplinary SC Physics GA 631WU UT WOS:000180191000004 ER PT J AU Ackerman, TP Stokes, GM AF Ackerman, TP Stokes, GM TI The Atmospheric Radiation Measurement program SO PHYSICS TODAY LA English DT News Item ID CLOUDS; RADAR; ABSORPTION; MODELS AB To predict reliably what increased greenhouse gases will do to global climate, we have to understand the crucial role of clouds. C1 US DOE, Atmospher Radiat Measurement Program, Washington, DC 20585 USA. RP Ackerman, TP (reprint author), US DOE, Atmospher Radiat Measurement Program, Washington, DC 20585 USA. NR 11 TC 321 Z9 327 U1 1 U2 14 PU AMER INST PHYSICS PI MELVILLE PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1, MELVILLE, NY 11747-4501 USA SN 0031-9228 J9 PHYS TODAY JI Phys. Today PD JAN PY 2003 VL 56 IS 1 BP 38 EP 44 DI 10.1063/1.1554135 PG 7 WC Physics, Multidisciplinary SC Physics GA 631WU UT WOS:000180191000015 ER PT J AU Newman, L Gordon, MP Heilman, P Muiznieks, A Sharp, M Loftfield, M Strycharz, S Meyer, M AF Newman, L Gordon, MP Heilman, P Muiznieks, A Sharp, M Loftfield, M Strycharz, S Meyer, M TI Transitioning phytoremediation of halogenated solvents from the laboratory to the field SO PLANT AND CELL PHYSIOLOGY LA English DT Meeting Abstract CT Annual Meeting of the Japanese-Society-of-Plant-Physiologists (JSPP) CY MAR 27-29, 2003 CL KINKI UNIV, OSAKA, JAPAN SP Japanese Soc plant Physiologists HO KINKI UNIV C1 Univ S Carolina, Columbia, SC 29208 USA. Savannah River Ecol Lab, Aiken, SC 29802 USA. Univ Washington, Seattle, WA 98195 USA. Washington State Univ, Pullman, WA 99164 USA. NR 0 TC 1 Z9 1 U1 0 U2 1 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0032-0781 J9 PLANT CELL PHYSIOL JI Plant Cell Physiol. PY 2003 VL 44 SU S BP S11 EP S11 PG 1 WC Plant Sciences; Cell Biology SC Plant Sciences; Cell Biology GA 661XC UT WOS:000181914300044 ER PT J AU Davila-Aponte, JA Inoue, K Keegstra, K AF Davila-Aponte, JA Inoue, K Keegstra, K TI Two chloroplastic protein translocation components, Tic110 and Toc75, are conserved in different plastid types from multiple plant species SO PLANT MOLECULAR BIOLOGY LA English DT Article DE EST; immunoblotting; plastid; Tic110; TIGR; Toc75 ID INNER ENVELOPE MEMBRANE; IMPORT APPARATUS; PRECURSOR PROTEINS; MAIZE; LEUCOPLASTS; BIOGENESIS; MACHINERY; HOMOLOGS; PATHWAY; DOMAIN AB Most chloroplastic proteins are nuclear-encoded and must be transported into the organelle post-translation ally. Proteinaceous components in the outer and inner envelope membranes of chloroplasts responsible for this import process were originally identified from pea seedlings. We sought to determine whether these proteins are conserved among different plant species other than pea and among different plastid types. We analyzed plant EST databases and found the presence of homologues to pea chloroplastic protein translocation components, Tic110 and Toc75, in both monocot and dicot species. Because these clones were obtained from various tissues, their presence in different types of plastids is proposed. Protein extracts were prepared from several plant species and from different plant tissues, and then probed with antisera raised against pea Tic110 and Toc75. The results support the idea that translocation components originally found in pea chloroplasts are conserved among different plant species and are present in various plastid types. C1 Michigan State Univ, MSU DOE Plant Res Lab, E Lansing, MI 48824 USA. Michigan State Univ, Dept Plant Biol, Dept Biochem & Mol Biol, E Lansing, MI 48824 USA. RP Keegstra, K (reprint author), Michigan State Univ, MSU DOE Plant Res Lab, E Lansing, MI 48824 USA. NR 32 TC 22 Z9 24 U1 0 U2 2 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0167-4412 J9 PLANT MOL BIOL JI Plant Mol.Biol. PD JAN PY 2003 VL 51 IS 2 BP 175 EP 181 DI 10.1023/A:1021190319786 PG 7 WC Biochemistry & Molecular Biology; Plant Sciences SC Biochemistry & Molecular Biology; Plant Sciences GA 616VP UT WOS:000179324300003 PM 12602876 ER PT S AU Hudson, SR Monticello, DA Reiman, AH Strickler, DJ Hirshman, SP AF Hudson, SR Monticello, DA Reiman, AH Strickler, DJ Hirshman, SP BE Falconer, IS Dewar, RL Khachan, J TI Constructing integrable full-pressure full-current free-boundary stellarator magnetohydrodynamic equilibria SO PLASMA PHYSICS SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT International Congress on Plasma Physics CY JUL 15-19, 2002 CL SYDNEY, AUSTRALIA SP Int Union Pure & Appl Phys, Australian Inst Phys, New S Wales Dept State & Reg Dev ID MAGNETIC-FIELDS; ISLANDS AB For the (non-axisymmetric) stellarator class of plasma confinement devices to be feasible candidates for fusion power stations it is essential that, to a good approximation, the magnetic field lines lie on nested flux surfaces; however, the inherent lack of a continuous symmetry implies that magnetic islands are guaranteed to exist. Magnetic islands break the smooth topology of nested flux surfaces and chaotic field lines result when magnetic islands overlap. An analogous case occurs with 1(1)/(2)-dimension Hamiltonian systems where resonant perturbations cause singularities in the transformation to action-angle 2 coordinates and destroy integrability. The suppression of magnetic islands is a critical issue for stellarator design, particularly for small aspect ratio-devices. Techniques for 'healing' vacuum fields and fixed-boundary plasma equilibria have been developed, but what is ultimately required is a procedure for designing stellarators such that the self-consistent plasma equilibrium currents and the coil currents combine to produce an integrable magnetic field, and such a procedure is presented here for the first time. Magnetic islands in free-boundary full-pressure full-current stellarator magnetohydrodynamic equilibria are suppressed using a procedure based on the Princeton Iterative Equilibrium Solver [A.H.Reiman & H.S.Greenside, Comp. Phys. Comm., 43:157, 1986.] which iterates the equilibrium equations to obtain the plasma equilibrium. At each iteration, changes to a Fourier representation of the coil geometry are made to cancel resonant fields produced by the plasma. As the iterations continue, the coil geometry and the plasma simultaneously converge to an equilibrium in which the island content is negligible. The method is applied to a candidate plasma and coil design for the National Compact Stellarator eXperiment. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Hudson, SR (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 16 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 0-7354-0133-0 J9 AIP CONF PROC PY 2003 VL 669 BP 561 EP 564 PG 4 WC Physics, Fluids & Plasmas SC Physics GA BX04A UT WOS:000184031800142 ER PT S AU Lapenta, G Brackbill, JU AF Lapenta, G Brackbill, JU BE Falconer, IS Dewar, RL Khachan, J TI Magnetic reconnection: MHD and beyond SO PLASMA PHYSICS SE AIP Conference Proceedings LA English DT Proceedings Paper CT International Congress on Plasma Physics CY JUL 15-19, 2002 CL SYDNEY, AUSTRALIA SP Int Union Pure & Appl Phys, Australian Inst Phys, New S Wales Dept State & Reg Dev ID INSTABILITY; SHEET; FLOW AB A new paradigm is considered for 3D magnetic reconnection where the interaction of reconnection processes with current aligned instabilities plays an important role. According to the new paradigm, the initial equilibrium is rendered unstable by current aligned instabilities.(lower-hybrid drift instability first, drift-kink instability later) and the non-uniform development of kinking modes leads to compression of magnetic field lines in certain locations and rarefaction in others. The areas where the flow is compressional undergo driven reconnection on the time scale of the driving mechanism (the kink mode). In the present paper we illustrate this series of events with a selection of simulation results. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Lapenta, G (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. 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 0-7354-0133-0 J9 AIP CONF PROC PY 2003 VL 669 BP 773 EP 776 PG 4 WC Physics, Fluids & Plasmas SC Physics GA BX04A UT WOS:000184031800194 ER PT S AU Wiederrecht, GP Wurtz, GA Im, JS Hranisavljevic, J AF Wiederrecht, GP Wurtz, GA Im, JS Hranisavljevic, J BE Halas, NJ TI Modulation of the exciton lifetime of j-aggregates on metal nanoparticles and nanoparticle arrays explored through ultrafast spectroscopy and near-field optical microscopy SO PLASMONICS: METALLIC NANOSTRUCTURES AND THEIR OPTICAL PROPERTIES SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Plasmonics: Metallic Nanostructures and Their Optical Properties CY AUG 03-05, 2003 CL SAN DIEGO, CA SP SPIE DE plasmonics; nanoparticles; exciton; hybrid materials; j-aggregates; nanophotonics ID ELECTROMAGNETIC ENERGY-TRANSPORT; SILVER NANOPARTICLES; CYANINE DYE; COLLOIDAL SILVER; WAVE-GUIDES; DYNAMICS; PARTICLES; FLUORESCENCE; EXCITATION; POLARIZATION AB Illumination of metal nanoparticles at the plasmon resonance produces enhanced evanescent fields on the nanoparticles' surfaces. The unusual strength of the field make it a target for exploring photoinduced phenomena at the nanoscale, if efficient functionalization or coating of the nanoparticle surface with appropriate chromophores is possible. One direction is to use cyanine dyes that form monolayers of J-aggregates on the surface of noble metal nanoparticle colloids. The unique, collective electronic properties of J-aggregates produce excitons with enormous extinction coefficients that are of interest for their efficient energy transfer, electron transfer, and nonlinear optical properties. In that vein, we report our results on time-resolved spectroscopy and near-field scanning optical microscopy (NSOM) of J-aggregate exciton dynamics on Ag and Au nanoparticle colloids. Utrafast transient 14 absorption studies show that J-aggregate exciton lifetimes on Ag nanoparticles are much longer than on Au nanoparticles, with a 300 ps lifetime that is two orders of magnitude longer than the electronic processes in the nanoparticles themselves. Complementary NSOM studies of the colloids show that fluorescence from the J-aggregates on the Ag nanoparticles is induced by the scanning probe. These results may be significant for improving the nanophotonic performance of hybrid materials for nanoscale applications. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Wiederrecht, GP (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 42 TC 2 Z9 2 U1 1 U2 9 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5094-4 J9 P SOC PHOTO-OPT INS PY 2003 VL 5221 BP 1 EP 13 DI 10.1117/12.510416 PG 13 WC Materials Science, Multidisciplinary; Materials Science, Characterization & Testing; Optics SC Materials Science; Optics GA BY25H UT WOS:000188460800001 ER PT S AU Chung, BW Moore, KT Morton, SA Shuh, DK Tobin, JG AF Chung, BW Moore, KT Morton, SA Shuh, DK Tobin, JG BE Jarvinen, GD TI Synchrotron-radiation-based photoelectron and X-Ray Absorption Spectroscopy of cerium and plutonium SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID ELECTRONIC-STRUCTURE; RESONANT PHOTOEMISSION; 5F ELECTRONS; CE; LOCALIZATION; SURFACE; PU C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Chung, BW (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA. RI Chung, Brandon/G-2929-2012 NR 10 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 4 EP 6 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100002 ER PT S AU Blobaum, K Haslam, J Brough, A Wall, M Schwartz, A AF Blobaum, K Haslam, J Brough, A Wall, M Schwartz, A BE Jarvinen, GD TI Investigating the delta/alpha' martensitic phase transformation in Pu-Ga alloys SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Lawrence Livermore Natl Lab, Mat Sci & Technol Div, Livermore, CA 94551 USA. RP Blobaum, K (reprint author), Lawrence Livermore Natl Lab, Mat Sci & Technol Div, Livermore, CA 94551 USA. NR 1 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 9 EP 11 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100004 ER PT S AU Sarrao, JL Morales, LA Thompson, JD Scott, BL Stewart, GR Wastin, F Rebizant, J Boulet, P Colineau, E Lander, GH AF Sarrao, JL Morales, LA Thompson, JD Scott, BL Stewart, GR Wastin, F Rebizant, J Boulet, P Colineau, E Lander, GH BE Jarvinen, GD TI Plutonium-based superconductivity: The audacity of the 5f electrons? SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Sarrao, JL (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI BOULET, Pascal/D-6494-2011; Scott, Brian/D-8995-2017 OI BOULET, Pascal/0000-0003-0684-4397; Scott, Brian/0000-0003-0468-5396 NR 5 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 12 EP 14 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100005 ER PT S AU Manley, ME Lander, GH Sinn, H Alatas, A Hults, WL McQueeney, RJ Lashley, JC Smith, JL Willit, J AF Manley, ME Lander, GH Sinn, H Alatas, A Hults, WL McQueeney, RJ Lashley, JC Smith, JL Willit, J BE Jarvinen, GD TI Phonon dispersion in actinides measured with inelastic x-ray scattering: New opportunities to solve some old problems SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID URANIUM; PLUTONIUM C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Manley, ME (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Manley, Michael/N-4334-2015 NR 11 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 15 EP 18 PG 4 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100006 ER PT S AU Tobin, JG Chung, BW Schulze, RK Shuh, DK AF Tobin, JG Chung, BW Schulze, RK Shuh, DK BE Jarvinen, GD TI A new paradigm for the determination of the 5f electronic structure of Pu and the actinides SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID DELTA-PU; PHOTOEMISSION C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Tobin, JG (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RI Chung, Brandon/G-2929-2012 NR 9 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 19 EP 20 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100007 ER PT S AU Runde, W Bean, A Scott, BL AF Runde, W Bean, A Scott, BL BE Jarvinen, GD TI Insight into the coordination chemistry of plutonium compounds: Synthesis and structural characteristics of Pu(III) oxalate and Pu(VI) hydrous oxides SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87544 USA. RP Runde, W (reprint author), Los Alamos Natl Lab, Div Chem, POB 1663, Los Alamos, NM 87544 USA. RI Scott, Brian/D-8995-2017 OI Scott, Brian/0000-0003-0468-5396 NR 6 TC 2 Z9 2 U1 1 U2 5 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 23 EP 25 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100008 ER PT S AU Gibson, JK Haire, RG Santos, M Marcalo, J de Matos, AP AF Gibson, JK Haire, RG Santos, M Marcalo, J de Matos, AP BE Jarvinen, GD TI Thermochemistry of transuranium actinide oxide molecules investigated by FTICR-MS SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Gibson, JK (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RI Santos, Marta/A-2411-2012 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 30 EP 32 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100011 ER PT S AU Sinkov, SI Rapko, BM Lumetta, GJ Hutchison, JE Parks, BW AF Sinkov, SI Rapko, BM Lumetta, GJ Hutchison, JE Parks, BW BE Jarvinen, GD TI Bicyclic and acyclic diamides: Comparison of their aqueous phase binding constants with tetra- and hexavalent actinides SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Sinkov, SI (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. NR 4 TC 2 Z9 2 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 36 EP 38 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100013 ER PT S AU Westphal, BR Vaden, D Scott, LW Sherman, SR Hua, TQ Krsul, JR AF Westphal, BR Vaden, D Scott, LW Sherman, SR Hua, TQ Krsul, JR BE Jarvinen, GD TI Investigation of plutonium in uranium products during spent fuel treatment SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID TRICHLORIDE; EXTRACTION C1 Argonne Natl Lab, Idaho Falls, ID 83403 USA. RP Westphal, BR (reprint author), Argonne Natl Lab, Idaho Falls, ID 83403 USA. NR 4 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 45 EP 46 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100016 ER PT S AU Sportsman, S Bluhm, E Abney, K AF Sportsman, S Bluhm, E Abney, K BE Jarvinen, GD TI The separation of americium and plutonium achieved by facilitated transport through fixed site carrier membranes utilizing CMPO Ligands SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID POROUS ALUMINA MEMBRANES C1 Los Alamos Natl Lab, Div Nucl Mat Technol, Actinide Proc Chem Grp, NMT2, Los Alamos, NM 87545 USA. RP Sportsman, S (reprint author), Los Alamos Natl Lab, Div Nucl Mat Technol, Actinide Proc Chem Grp, NMT2, Los Alamos, NM 87545 USA. NR 9 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 50 EP 51 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100018 ER PT S AU Margevicius, RW AF Margevicius, RW BE Jarvinen, GD TI Overview of nuclear fuel fabrication efforts at Los Alamos for the Advanced Fuel Cycle Initiative SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Margevicius, RW (reprint author), Los Alamos Natl Lab, NMT-11, Los Alamos, NM 87545 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 54 EP 54 PG 1 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100020 ER PT S AU Chidester, K Stoll, W AF Chidester, K Stoll, W BE Jarvinen, GD TI Plutonium and minor actinide fuels - The good, the bad, and the future? SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Chidester, K (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 55 EP 56 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100021 ER PT S AU Weber, WJ Icenhower, JP Hess, NJ AF Weber, WJ Icenhower, JP Hess, NJ BE Jarvinen, GD TI Self-radiation effects in plutonium-bearing glasses SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID WASTE C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Weber, WJ (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA. RI Weber, William/A-4177-2008 OI Weber, William/0000-0002-9017-7365 NR 3 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 57 EP 58 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100022 ER PT S AU Martz, JC Morales, LA Alexander, KB AF Martz, JC Morales, LA Alexander, KB BE Jarvinen, GD TI An overview of plutonium aging SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Martz, JC (reprint author), Los Alamos Natl Lab, MS G754, Los Alamos, NM 87545 USA. NR 2 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 67 EP 68 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100025 ER PT S AU Schwartz, AJ Wall, MA Wolfer, WG Moore, KT AF Schwartz, AJ Wall, MA Wolfer, WG Moore, KT BE Jarvinen, GD TI Advanced transmission electron microscopy of Pu alloys SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA. RP Schwartz, AJ (reprint author), Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, L-355, Livermore, CA 94550 USA. NR 2 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 69 EP 72 PG 4 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100026 ER PT S AU Migliori, A Miller, DA Lashley, JC Freibert, F Betts, JB Ramos, M AF Migliori, A Miller, DA Lashley, JC Freibert, F Betts, JB Ramos, M BE Jarvinen, GD TI Pu has no future: A real-time measurement of Pu aging SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc AB Recent RUS measurements on polycrystalline samples of delta-Pu have established that RUS can detect changes in elastic moduli of 0.3 parts per million, so that for the first time ever we accurately measured aging effects in real time for Ga-stabilized fcc Pu. Our measurements were performed on alloys made from of nominally pure Pu-239 as well as ones made with a 7.1% Pu-238 fraction to accelerate aging. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Migliori, A (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 2 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 73 EP 75 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100027 ER PT S AU Lawson, AC Roberts, JA Martinez, B AF Lawson, AC Roberts, JA Martinez, B BE Jarvinen, GD TI Invar effect, thermal expansion, and elastic softening of delta-phase Pu SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Lawson, AC (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 13 TC 2 Z9 2 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 82 EP 84 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100030 ER PT S AU Haire, RG Heathman, S Idiri, M Le Bihan, T Lindbaum, A Rebizant, J AF Haire, RG Heathman, S Idiri, M Le Bihan, T Lindbaum, A Rebizant, J BE Jarvinen, GD TI Investigations of protactinium metal under pressure provide important insights into actinide bonding concepts SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Oak Ridge Natl Lab, CSD, Oak Ridge, TN 37831 USA. RP Haire, RG (reprint author), Oak Ridge Natl Lab, CSD, POB 2008,MS-6375, Oak Ridge, TN 37831 USA. RI LE BIHAN, Tristan/I-5063-2013 NR 12 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 85 EP 86 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100031 ER PT S AU Krenn, CR Sadigh, B Schwartz, AJ Wolfer, WG AF Krenn, CR Sadigh, B Schwartz, AJ Wolfer, WG BE Jarvinen, GD TI Effects of local solute ordering and plasticity on the delta to alpha transformation in gallium-stabilized plutonium alloys SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID METAL; SIMULATION AB The delta-to-alpha transformation in Ga-stabilized plutonium alloys has many unusual features. It is a thermally activated martensitic transformation with double-c transformation kinetics. The alpha product has an approximately 20% smaller volume than delta, but its volume can change an additional 2% depending on the transformation path. The thermally induced transformation also rarely proceeds to more than 40% completion. We use ab-initio techniques to look at local ordering of gallium in the alpha phase and use continuum elastoplastic energy calculations to understand the possible effects of plastic deformations during the transformations. We discuss how local ordering and plastic deformation may explain some of the unusual features of the transformation. C1 Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94551 USA. RP Krenn, CR (reprint author), Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94551 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 87 EP 89 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100032 ER PT S AU Ruggiero, C Twary, S Deladurantaye, E AF Ruggiero, C Twary, S Deladurantaye, E BE Jarvinen, GD TI Phytosiderophore effects on subsurface actinide contaminants: Potential for phytostabilization and phytoextraction SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID CALCAREOUS SOIL; PLANT-BORNE; MOBILIZATION; CHELATORS; IRON C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. RP Ruggiero, C (reprint author), Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. NR 17 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 95 EP 97 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100034 ER PT S AU Zavarin, M Maxwell, RM Kersting, AB Zhao, P Sylwester, ER Allen, PG Williams, RW AF Zavarin, M Maxwell, RM Kersting, AB Zhao, P Sylwester, ER Allen, PG Williams, RW BE Jarvinen, GD TI Plutonium colloid-facilitated transport in the environment - Experimental and transport modeling evidence for plutonium migration mechanisms SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID GOETHITE; HEMATITE; SORPTION; SITE C1 Lawrence Livermore Natl Lab, Energy & Environm Directorate, Livermore, CA 94551 USA. RP Zavarin, M (reprint author), Lawrence Livermore Natl Lab, Energy & Environm Directorate, 7000 East Ave, Livermore, CA 94551 USA. RI Maxwell, Reed/D-7980-2013 OI Maxwell, Reed/0000-0002-1364-4441 NR 5 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 102 EP 104 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100037 ER PT S AU Asoka-Kumar, P Glade, S Sterne, PA Howell, R AF Asoka-Kumar, P Glade, S Sterne, PA Howell, R BE Jarvinen, GD TI Evolution of defects in Pu during isochronal annealing and self-irradiation SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Asoka-Kumar, P (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 0 TC 6 Z9 6 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 121 EP 122 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100043 ER PT S AU Balasubramanian, K Siekhaus, WJ McLean, W AF Balasubramanian, K Siekhaus, WJ McLean, W BE Jarvinen, GD TI Computational modeling of uranium hydriding and complexes SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID KINETICS; RATES C1 Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA. RP Balasubramanian, K (reprint author), Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA. NR 9 TC 1 Z9 1 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 125 EP 127 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100045 ER PT S AU Baskes, MI Stan, A Muralidharan, K AF Baskes, MI Stan, A Muralidharan, K BE Jarvinen, GD TI Phase stability of Pu and Pu-Ga alloys from atomistic calculations SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID EMBEDDED-ATOM POTENTIALS; IMPURITIES; METALS C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. RP Baskes, MI (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. NR 16 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 128 EP 130 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100046 ER PT S AU Bouchet, J Albers, RC AF Bouchet, J Albers, RC BE Jarvinen, GD TI New pseudophase structure for alpha-Pu SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID DELTA-PU; PLUTONIUM C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Bouchet, J (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87545 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 133 EP 135 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100048 ER PT S AU Butterfield, MT Durakiewicz, T Guziewicz, E Joyce, JJ Moore, DP Arko, AJ Morales, LA Wills, JM Sarrao, JL Pagliuso, PG Moreno, NM Olson, CG AF Butterfield, MT Durakiewicz, T Guziewicz, E Joyce, JJ Moore, DP Arko, AJ Morales, LA Wills, JM Sarrao, JL Pagliuso, PG Moreno, NM Olson, CG BE Jarvinen, GD TI Photoemission and electronic structure of UCoGa5 and PuCoGa5 SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Butterfield, MT (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87544 USA. RI Guziewicz, Elzbieta/S-4910-2016 OI Guziewicz, Elzbieta/0000-0001-6158-5258 NR 2 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 139 EP 140 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100050 ER PT S AU Durakiewicz, T Butterfield, MT Guziewicz, E Joyce, JJ Morales, L Arko, AJ Lander, GH Wastin, F Rebizant, J AF Durakiewicz, T Butterfield, MT Guziewicz, E Joyce, JJ Morales, L Arko, AJ Lander, GH Wastin, F Rebizant, J BE Jarvinen, GD TI Magnetism and localization in 5f monopnictides and monochalcogenides using PES SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, MST Div, Los Alamos, NM 87545 USA. RP Durakiewicz, T (reprint author), Los Alamos Natl Lab, MST Div, POB 1663, Los Alamos, NM 87545 USA. RI Guziewicz, Elzbieta/S-4910-2016 OI Guziewicz, Elzbieta/0000-0001-6158-5258 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 144 EP 145 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100052 ER PT S AU Fluss, MJ AF Fluss, MJ BE Jarvinen, GD TI Defect-based spin mediation in delta-phase plutonium SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID ELECTRONS; GA C1 Lawrence Livermore Natl Lab, Livermore, CA 94577 USA. RP Fluss, MJ (reprint author), Lawrence Livermore Natl Lab, POB 888 East Ave, Livermore, CA 94577 USA. NR 9 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 146 EP 147 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100053 ER PT S AU Glade, SC Trelenberg, TW Tobin, JG Sterne, PA Hamza, AV AF Glade, SC Trelenberg, TW Tobin, JG Sterne, PA Hamza, AV BE Jarvinen, GD TI The properties of actinide nanostructures SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Glade, SC (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 1 TC 2 Z9 2 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 148 EP 149 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100054 ER PT S AU Guziewicz, E Durakiewicz, T Joyce, JJ Butterfield, MT Morales, L Arko, AJ Sarrao, JL Wills, JM Olson, CG AF Guziewicz, E Durakiewicz, T Joyce, JJ Butterfield, MT Morales, L Arko, AJ Sarrao, JL Wills, JM Olson, CG BE Jarvinen, GD TI USb2 and PuSb2 electronic structure: A photoemission study SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Guziewicz, E (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Guziewicz, Elzbieta/S-4910-2016 OI Guziewicz, Elzbieta/0000-0001-6158-5258 NR 0 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 150 EP 151 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100055 ER PT S AU Joyce, JJ Wills, JM Durakiewicz, T Butterfield, MT Guziewicz, E Sarrao, JL Morales, LA Moore, DP Arko, AJ AF Joyce, JJ Wills, JM Durakiewicz, T Butterfield, MT Guziewicz, E Sarrao, JL Morales, LA Moore, DP Arko, AJ BE Jarvinen, GD TI The localized and itinerant nature of 5f electrons in Pu and Pu compounds SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Joyce, JJ (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Guziewicz, Elzbieta/S-4910-2016 OI Guziewicz, Elzbieta/0000-0001-6158-5258 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 152 EP 153 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100056 ER PT S AU Kennedy, JR AF Kennedy, JR BE Jarvinen, GD TI Investigation of the thermal characteristics of an americium bearing Pu-Zr-40-based alloy SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Kennedy, JR (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 156 EP 158 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100058 ER PT S AU Landa, A Soderlind, P Ruban, A AF Landa, A Soderlind, P Ruban, A BE Jarvinen, GD TI Theory for delta-Pu and delta-Pu based alloys SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID PHASE-DIAGRAM; PLUTONIUM; SYSTEM C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Landa, A (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. RI Ruban, Andrei/B-7457-2012 NR 7 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 159 EP 161 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100059 ER PT S AU Mason, CFV Zygmunt, SJ Wedman, DE Eller, PG Erickson, RM Hansen, WJ Roberson, GD AF Mason, CFV Zygmunt, SJ Wedman, DE Eller, PG Erickson, RM Hansen, WJ Roberson, GD BE Jarvinen, GD TI A comparison of the design of Russian and US containers for plutonium oxide storage SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Mason, CFV (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 13 TC 2 Z9 2 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 162 EP 166 PG 5 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100060 ER PT S AU McMahan, AK Held, K Scalettar, RT AF McMahan, AK Held, K Scalettar, RT BE Jarvinen, GD TI Thermodynamic and spectral properties of compressed Ce calculated by the combination of the local density approximation and dynamical mean field theory SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID CRYSTAL-STRUCTURE; PRESSURE; PRASEODYMIUM; PHASE; METAL; 5F; 4F C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP McMahan, AK (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 15 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 168 EP 169 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100062 ER PT S AU Moore, KT Wall, MA Schwartz, AJ Chung, BW Shuh, DK Schulze, RK Tobin, JG AF Moore, KT Wall, MA Schwartz, AJ Chung, BW Shuh, DK Schulze, RK Tobin, JG BE Jarvinen, GD TI The failure of Russell-Saunders coupling in the 5f states of plutonium SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID DELTA-PU; ACTINIDE METALS; ELECTRONS; LOCALIZATION; SERIES C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Moore, KT (reprint author), Lawrence Livermore Natl Lab, L-350, Livermore, CA 94550 USA. RI Chung, Brandon/G-2929-2012 NR 9 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 170 EP 173 PG 4 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100063 ER PT S AU Morales, LA Lawson, AC Conradson, S Butler, EN Moore, DP Ramos, M Roberts, JA Martinez, B AF Morales, LA Lawson, AC Conradson, S Butler, EN Moore, DP Ramos, M Roberts, JA Martinez, B BE Jarvinen, GD TI Aging and phase stability in delta-stabilized Pu SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID MODEL C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Morales, LA (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 4 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 174 EP 175 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100064 ER PT S AU Mulford, RN Asaro, R AF Mulford, RN Asaro, R BE Jarvinen, GD TI Measurement of mechanical properties of delta plutonium metal using spherical microindentation SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Mulford, RN (reprint author), Los Alamos Natl Lab, NMT-15, Los Alamos, NM 87545 USA. NR 6 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 176 EP 178 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100065 ER PT S AU Mulford, RN Swift, DC AF Mulford, RN Swift, DC BE Jarvinen, GD TI Formation of plutonium hydride PuH2: Description of the reaction rate surface as a function of pressure and temperature SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Mulford, RN (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87544 USA. NR 2 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 179 EP 181 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100066 ER PT S AU Mulford, RN Trujillo, EA AF Mulford, RN Trujillo, EA BE Jarvinen, GD TI Radiation damage in delta plutonium metal, measured as change in bulk density SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Mulford, RN (reprint author), Los Alamos Natl Lab, NMT-15, Los Alamos, NM 87545 USA. NR 7 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 182 EP 183 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100067 ER PT S AU Nelson, EJ Blobaum, KJM Wall, MA Allen, PG Schwartz, AJ Booth, CH AF Nelson, EJ Blobaum, KJM Wall, MA Allen, PG Schwartz, AJ Booth, CH BE Jarvinen, GD TI Local structure and vibrational properties of alpha'-Pu martensite and Ga-stabilized delta-Pu SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Lawrence Livermore Natl Lab, Seaborg Inst Transactinium Sci, Livermore, CA 94550 USA. RP Nelson, EJ (reprint author), Lawrence Livermore Natl Lab, Seaborg Inst Transactinium Sci, POB 808, Livermore, CA 94550 USA. NR 3 TC 2 Z9 2 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 187 EP 189 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100069 ER PT S AU Paffett, MT Farr, D Kelly, D AF Paffett, MT Farr, D Kelly, D BE Jarvinen, GD TI An alternative interpretation of the existence and importance of the PuO2+X center dot H2O solid solution SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID PLUTONIUM DIOXIDE; WATER; PUO2+X; CORROSION; KINETICS; OXYGEN C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. RP Paffett, MT (reprint author), Los Alamos Natl Lab, Div Chem, POB 1663, Los Alamos, NM 87545 USA. NR 17 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 193 EP 195 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100071 ER PT S AU Soderlind, P Landa, A Sadigh, A AF Soderlind, P Landa, A Sadigh, A BE Jarvinen, GD TI Theory for alpha- and delta-Pu SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID PLUTONIUM; LOCALIZATION C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Soderlind, P (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 201 EP 204 PG 4 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100074 ER PT S AU Sterne, PA Pask, JE AF Sterne, PA Pask, JE BE Jarvinen, GD TI Theory of positron annihilation in helium-filled bubbles in plutonium SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Sterne, PA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 3 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 205 EP 206 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100075 ER PT S AU Stultz, J Paffett, AT Joyce, SA AF Stultz, J Paffett, AT Joyce, SA BE Jarvinen, GD TI Thermal- and radiation-induced interactions of water on UO2 surfaces SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. RP Stultz, J (reprint author), Los Alamos Natl Lab, Div Chem, POB 1663, Los Alamos, NM 87545 USA. 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 207 EP 208 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100076 ER PT S AU Swift, DC Tierney, TE Paisley, DL Kyrala, GA Johnson, RP Hauer, A AF Swift, DC Tierney, TE Paisley, DL Kyrala, GA Johnson, RP Hauer, A BE Jarvinen, GD TI Laser-driven materials experiments: New capabilities for probing dynamic behavior SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Swift, DC (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 2 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 209 EP 210 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100077 ER PT S AU Trujillo, MT Trujillo, CC Miller, DA Baiardo, J AF Trujillo, MT Trujillo, CC Miller, DA Baiardo, J BE Jarvinen, GD TI Acoustic resonance spectroscopy for structural evaluation SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Trujillo, MT (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 211 EP 211 PG 1 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100078 ER PT S AU Turchi, PEA Allen, PG Kaufman, L Zhou, SH Liu, ZK AF Turchi, PEA Allen, PG Kaufman, L Zhou, SH Liu, ZK BE Jarvinen, GD TI Thermodynamics of Pu-based alloys SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Turchi, PEA (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA. NR 0 TC 0 Z9 0 U1 1 U2 6 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 212 EP 212 PG 1 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100079 ER PT S AU Uberuaga, BP Valone, SM Baskes, MI Voter, AF AF Uberuaga, BP Valone, SM Baskes, MI Voter, AF BE Jarvinen, GD TI Accelerated molecular dynamics study of vacancies in Pu SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID SIMULATION C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Uberuaga, BP (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. NR 9 TC 7 Z9 7 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 213 EP 215 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100080 ER PT S AU Valone, SM Baskes, MI Uberuaga, BP AF Valone, SM Baskes, MI Uberuaga, BP BE Jarvinen, GD TI Atomistic models of point defects in plutonium metal SO PLUTONIUM FUTURES - THE SCIENCE SE AIP Conference Proceedings LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID SELF-DIFFUSION; SEMICONDUCTORS; IMPURITIES C1 Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. RP Valone, SM (reprint author), Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. EM smv@lanl.gov NR 11 TC 2 Z9 2 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 216 EP 218 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100081 ER PT S AU Wong, J Holt, M Hong, H Schwartz, AJ Zschack, P Chiang, TC Wall, M AF Wong, J Holt, M Hong, H Schwartz, AJ Zschack, P Chiang, TC Wall, M BE Jarvinen, GD TI Intensity patterns of diffuse x-ray scattering from thermally populated phonons in fcc delta-Pu-Ga SO PLUTONIUM FUTURES - THE SCIENCE SE AIP Conference Proceedings LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID PLUTONIUM; DYNAMICS AB Thermal diffuse scattering (TDS) x-ray intensity patterns from phonons in an fee delta-Pu-Ga alloy have been recorded for the first time. A small-diameter (25-mum) monochromatic 18-keV x-ray beam was used to obtain good-quality TDS images from a polycrystalline delta-Pu-Ga specimen. The recorded TDS images agree qualitatively well with theoretical images predicted by a generalized Morse potential for an fee lattice with parameters determined directly from the known elastic constants of the alloy. These results illustrate the power of TDS analysis for phonon studies in otherwise inaccessible systems and are the target basis for a future determination of actual phonon dispersion curves in fcc-Pu materials using a combination of both TDS experiments and high-resolution inelastic x-ray scattering (HRIXS). C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Wong, J (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA. 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 221 EP 223 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100083 ER PT S AU Bean, AC Scott, BL Albrecht-Schmitt, T Runde, W AF Bean, AC Scott, BL Albrecht-Schmitt, T Runde, W BE Jarvinen, GD TI Structural trends and bonding of the 5f-elements (U-Am) with the oxoligand IO3- SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID NEPTUNIUM C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Bean, AC (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Scott, Brian/D-8995-2017 OI Scott, Brian/0000-0003-0468-5396 NR 8 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 233 EP 235 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100086 ER PT S AU Berg, JM Conradson, SD Matonic, JH Neu, MP Reilly, SD AF Berg, JM Conradson, SD Matonic, JH Neu, MP Reilly, SD BE Jarvinen, GD TI Characterization of multiple Pu(IV) chloride complexes in aqueous solution by coordinated visible absorption, EXAFS and crystal structure studies SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Berg, JM (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 2 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 236 EP 237 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100087 ER PT S AU Boukhalfa, H Reilly, SD Smith, WH Neu, MP AF Boukhalfa, H Reilly, SD Smith, WH Neu, MP BE Jarvinen, GD TI Stability and redox behavior of plutonium-EDTA and mixed Pu(IV)-EDTA-L (L = hydroxide, carbonate, citrate) complexes SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. RP Boukhalfa, H (reprint author), Los Alamos Natl Lab, Div Chem, POB 1663, Los Alamos, NM 87545 USA. NR 4 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 238 EP 240 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100088 ER PT S AU Enriquez, AE Matonic, JH Scott, BL Neu, MP AF Enriquez, AE Matonic, JH Scott, BL Neu, MP BE Jarvinen, GD TI Early actinide organonitrile compounds and their reactivity SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID NEUTRON-DIFFRACTION; URANIUM; CHEMISTRY; TRIIODIDE C1 Los Alamos Natl Lab, Div Chem, C SIC, Los Alamos, NM 87545 USA. RP Enriquez, AE (reprint author), Los Alamos Natl Lab, Div Chem, C SIC, POB 1663, Los Alamos, NM 87545 USA. RI Scott, Brian/D-8995-2017 OI Scott, Brian/0000-0003-0468-5396 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 244 EP 246 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100090 ER PT S AU Matonic, JH Enriquez, AE Scott, BL Paine, RT Neu, MP AF Matonic, JH Enriquez, AE Scott, BL Paine, RT Neu, MP BE Jarvinen, GD TI Plutonium (IV) complexes of mixed pyridine N-oxide and phosphinoxide f-element extractants SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID SOLVENT-EXTRACTION; AMERICIUM(III) C1 Los Alamos Natl Lab, Dept Chem, Los Alamos, NM 87545 USA. RP Matonic, JH (reprint author), Los Alamos Natl Lab, Dept Chem, POB 1663, Los Alamos, NM 87545 USA. RI Scott, Brian/D-8995-2017 OI Scott, Brian/0000-0003-0468-5396 NR 10 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 251 EP 253 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100093 ER PT S AU Wilkerson, MP Berg, JM Dewey, HJ AF Wilkerson, MP Berg, JM Dewey, HJ BE Jarvinen, GD TI Spectroscopic investigations of the electronic structure of neptunyl ions SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID ACTINYL IONS; TRANSITIONS; CS2NPO2CL4 C1 Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Wilkerson, MP (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87544 USA. NR 9 TC 1 Z9 1 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 262 EP 263 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100098 ER PT S AU Willson, SP Veirs, DK Baiardo, JP AF Willson, SP Veirs, DK Baiardo, JP BE Jarvinen, GD TI Transuranic actinide reactions with simple gas-phase molecules SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID LANTHANIDE METAL ATOMS; INFRARED-SPECTRA; REACTION-PRODUCTS; SOLID ARGON C1 Los Alamos Natl Lab, NMT 11, Los Alamos, NM 87544 USA. RP Willson, SP (reprint author), Los Alamos Natl Lab, NMT 11, POB 1663, Los Alamos, NM 87544 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 264 EP 265 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100099 ER PT S AU Gallegos, UF Lee, TA Morales, LA AF Gallegos, UF Lee, TA Morales, LA BE Jarvinen, GD TI Fundamental thermodynamics of actinide-bearing mineral waste forms SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Gallegos, UF (reprint author), Los Alamos Natl Lab, MS G730 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. NR 4 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 283 EP 284 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100105 ER PT S AU Gray, D AF Gray, D BE Jarvinen, GD TI In-situ chlorination for molten-salt extraction SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Gray, D (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 285 EP 285 PG 1 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100106 ER PT S AU Kessinger, GF Thompson, MC AF Kessinger, GF Thompson, MC BE Jarvinen, GD TI Chop-leach dissolution of commercial reactor fuel SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Savannah River Technol Ctr, Aiken, SC 29803 USA. RP Kessinger, GF (reprint author), Savannah River Technol Ctr, 773-A,C-140, Aiken, SC 29803 USA. NR 2 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 288 EP 290 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100108 ER PT S AU Kim, YS Hofman, GL Hayes, SL Sohn, YH AF Kim, YS Hofman, GL Hayes, SL Sohn, YH BE Jarvinen, GD TI Analysis of thermomigration in irradiated U-Pu-Zr fuel SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID CONSTITUENT REDISTRIBUTION C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Kim, YS (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 5 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 293 EP 296 PG 4 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100110 ER PT S AU Long, KM Ford, DK Trujillo, L Jarvinen, GD AF Long, KM Ford, DK Trujillo, L Jarvinen, GD BE Jarvinen, GD TI Photochemical oxidation of oxalate in Pu-238 process streams SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Nucl Mat Technol Div, Los Alamos, NM 87545 USA. RP Long, KM (reprint author), Los Alamos Natl Lab, Nucl Mat Technol Div, Los Alamos, NM 87545 USA. NR 1 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 300 EP 301 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100112 ER PT S AU Lu, NP Conca, J AF Lu, NP Conca, J BE Jarvinen, GD TI Plutonium-239 in synthetic brines after equilibration with magnesium oxide backfill SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID CEMENT; HYDRATE C1 Los Alamos Natl Lab, LANL Carlsbad Off, Earth & Environm Sci Div, Carlsbad, NM 88220 USA. RP Lu, NP (reprint author), Los Alamos Natl Lab, LANL Carlsbad Off, Earth & Environm Sci Div, EES-12,MS A141, Carlsbad, NM 88220 USA. NR 10 TC 2 Z9 2 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 302 EP 304 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100113 ER PT S AU Lucchini, JF Rafalski, A Riggs, M Conca, J AF Lucchini, JF Rafalski, A Riggs, M Conca, J BE Jarvinen, GD TI Influence of radiolysis byproducts on the actinide chemistry in brines from geological saline repository SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID NACL SOLUTIONS C1 Los Alamos Natl Lab, Carlsbad, NM 88220 USA. RP Lucchini, JF (reprint author), Los Alamos Natl Lab, EES-12,MS A141, Carlsbad, NM 88220 USA. NR 8 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 305 EP 306 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100114 ER PT S AU Ramsey, S Dodge, R Gruetzmacher, K Horst, E Myers, S AF Ramsey, S Dodge, R Gruetzmacher, K Horst, E Myers, S BE Jarvinen, GD TI Expansion of green is clean (GIC) program at nuclear materials technology (NMT) division facilities SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Ramsey, S (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 312 EP 313 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100117 ER PT S AU Samuels, JS Dale, DJ Abeyta, MAB Trujillo, PK Porterfield, DR Barbour, JK AF Samuels, JS Dale, DJ Abeyta, MAB Trujillo, PK Porterfield, DR Barbour, JK BE Jarvinen, GD TI Glovebox decontamination SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Samuels, JS (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 317 EP 318 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100119 ER PT S AU Slemmons, A FitzPatrick, J Treasure, J AF Slemmons, A FitzPatrick, J Treasure, J BE Jarvinen, GD TI Uranium-plutonium separations by ion exchange SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, C AAC, Los Alamos, NM 87545 USA. RP Slemmons, A (reprint author), Los Alamos Natl Lab, C AAC, Los Alamos, NM 87545 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 319 EP 320 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100120 ER PT S AU Stroud, MA Salazar, RR Abney, KD Bluhm, EA Danis, JA AF Stroud, MA Salazar, RR Abney, KD Bluhm, EA Danis, JA BE Jarvinen, GD TI Purification of aqueous plutonium chloride solutions via precipitation and washing SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Nucl Mat Technol Div, Actinide Proc Chem Grp NMT 2, Los Alamos, NM 87545 USA. RP Stroud, MA (reprint author), Los Alamos Natl Lab, Nucl Mat Technol Div, Actinide Proc Chem Grp NMT 2, Los Alamos, NM 87545 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 324 EP 326 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100122 ER PT S AU Boukhalfa, H Lack, J Reilly, SD Hersman, L Neu, MP AF Boukhalfa, H Lack, J Reilly, SD Hersman, L Neu, MP BE Jarvinen, GD TI Siderophore production and facilitated uptake of iron and plutonium in P-putida SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Chem Div, Los Alamos, NM 87545 USA. RP Boukhalfa, H (reprint author), Los Alamos Natl Lab, Chem Div, POB 1663, Los Alamos, NM 87545 USA. NR 0 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 343 EP 344 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100128 ER PT S AU Condit, RH AF Condit, RH BE Jarvinen, GD TI Aerosol mobility of high specific activity alpha-emitting materials SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Condit, RH (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 345 EP 346 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100129 ER PT S AU Francis, AJ AF Francis, AJ BE Jarvinen, GD TI Microbial transformations of plutonium and other actinides in transuranic and mixed wastes SO PLUTONIUM FUTURES - THE SCIENCE SE AIP Conference Proceedings LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Brookhaven Natl Lab, Dept Environm Sci, Upton, NY 11973 USA. RP Francis, AJ (reprint author), Brookhaven Natl Lab, Dept Environm Sci, Upton, NY 11973 USA. NR 2 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 350 EP 351 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100131 ER PT S AU Hess, RF Abney, KD Dorhout, PK AF Hess, RF Abney, KD Dorhout, PK BE Jarvinen, GD TI Synthesis of new plutonium main-group metal materials SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Hess, RF (reprint author), Los Alamos Natl Lab, NMT-2, Los Alamos, NM 87545 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 355 EP 356 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100133 ER PT S AU Neu, MP Ruggiero, CE Boukhalfa, H Reilly, SD Hersman, LE Lack, JG AF Neu, MP Ruggiero, CE Boukhalfa, H Reilly, SD Hersman, LE Lack, JG BE Jarvinen, GD TI Biotransformations of plutonium and uranium by naturally occurring microorganisms SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID BIOREMEDIATION; REDUCTION; BACTERIA C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. RP Neu, MP (reprint author), Los Alamos Natl Lab, Div Chem, POB 1663, Los Alamos, NM 87545 USA. NR 14 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 365 EP 367 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100137 ER PT S AU Reilly, SD Myers, WK Stout, SA Smith, DM Ginder-Vogel, MA Neu, MP AF Reilly, SD Myers, WK Stout, SA Smith, DM Ginder-Vogel, MA Neu, MP BE Jarvinen, GD TI Plutonium(VI) sorption to manganese dioxide SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. RP Reilly, SD (reprint author), Los Alamos Natl Lab, Div Chem, POB 1663, Los Alamos, NM 87545 USA. 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 375 EP 376 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100140 ER PT S AU Schwantes, JM Batchelor, W AF Schwantes, JM Batchelor, W BE Jarvinen, GD TI Sorption constants for Pu(III) - Pu(VI) onto mineral oxide surfaces SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc ID ADSORPTION; GOETHITE C1 Lawrence Berkeley Lab, Heavy Elements Grp, Div Nucl Sci, Berkeley, CA USA. RP Schwantes, JM (reprint author), Lawrence Berkeley Lab, Heavy Elements Grp, Div Nucl Sci, Berkeley, CA USA. NR 10 TC 0 Z9 0 U1 2 U2 4 PU AMER INST PHYSICS PI MELVILLE PA 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA SN 0094-243X BN 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 377 EP 380 PG 4 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100141 ER PT S AU Stout, SA Reilly, SD Smith, DM Myers, WK Ginder-Vogel, MA Skanthakumar, S Soderholm, L Neu, MP AF Stout, SA Reilly, SD Smith, DM Myers, WK Ginder-Vogel, MA Skanthakumar, S Soderholm, L Neu, MP BE Jarvinen, GD TI Interactions of plutonium (V) and plutonium (VI) with manganese dioxide, iron oxide, and sediments from the Hanford site SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Div Chem, Argonne Natl Lab, Actinide Environm & Struct Chem, Los Alamos, NM 87545 USA. RP Stout, SA (reprint author), Los Alamos Natl Lab, Div Chem, Argonne Natl Lab, Actinide Environm & Struct Chem, POB 1663, Los Alamos, NM 87545 USA. NR 0 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 381 EP 383 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100142 ER PT S AU Abeyta, MA AF Abeyta, MA BE Jarvinen, GD TI Analyzing samples using an IRIS inductively coupled plasma-atomic emission spectrometer (ICP-AES) SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Abeyta, MA (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 389 EP 389 PG 1 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100144 ER PT S AU Duan, YX Wang, CJ Winstead, CB AF Duan, YX Wang, CJ Winstead, CB BE Jarvinen, GD TI Exploration of plasma source cavity ring-down spectroscopy for highly sensitive elemental and isotope measurements SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Duan, YX (reprint author), Los Alamos Natl Lab, 1C-ACS,MS K484, Los Alamos, NM 87545 USA. NR 0 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 399 EP 399 PG 1 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100148 ER PT S AU Keegan, RP Gehrke, RJ AF Keegan, RP Gehrke, RJ BE Jarvinen, GD TI A technique for determination of the age of weapons-grade plutonium SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Keegan, RP (reprint author), Idaho Natl Engn & Environm Lab, Mail Stop 2114,POB 1625, Idaho Falls, ID 83415 USA. NR 5 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 403 EP 405 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100150 ER PT S AU Mecklenburg, SL Thronas, DL Wong, AS Marshall, RS Becker, GK AF Mecklenburg, SL Thronas, DL Wong, AS Marshall, RS Becker, GK BE Jarvinen, GD TI Preparation of traceable working reference material standards for the national TRU waste performance demonstration program SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, CAAC, Los Alamos, NM 87545 USA. RP Mecklenburg, SL (reprint author), Los Alamos Natl Lab, CAAC, MS G740, Los Alamos, NM 87545 USA. 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 409 EP 410 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100152 ER PT S AU Porterfield, DR AF Porterfield, DR BE Jarvinen, GD TI Furthering the science - ASTM international SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Actinide Analyt Chem Grp, Los Alamos, NM 87545 USA. RP Porterfield, DR (reprint author), Los Alamos Natl Lab, Actinide Analyt Chem Grp, Los Alamos, NM 87545 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 411 EP 412 PG 2 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100153 ER PT S AU Thronas, DL Wong, AS VanPelt, CE Gower, JS AF Thronas, DL Wong, AS VanPelt, CE Gower, JS BE Jarvinen, GD TI Plutonium process monitoring (PPM) system for plutonium-238 in aqueous scrap processing SO PLUTONIUM FUTURES - THE SCIENCE SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT 3rd Topical Conference on Plutonium and Actinides CY JUL 06-10, 2003 CL ALBUQUERQUE, NM SP Los Alamos Natl Lab, GT Seaborg Inst Transactinium Sci, Amer Nucl Soc C1 Los Alamos Natl Lab, Div Nucl Mat Technol, Los Alamos, NM 87545 USA. RP Thronas, DL (reprint author), Los Alamos Natl Lab, Div Nucl Mat Technol, Los Alamos, NM 87545 USA. NR 4 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 0-7354-0140-3 J9 AIP CONF PROC PY 2003 VL 673 BP 413 EP 415 PG 3 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology; Physics, Condensed Matter; Physics, Nuclear SC Chemistry; Nuclear Science & Technology; Physics GA BX17G UT WOS:000184499100154 ER PT J AU Maslowski, W Lipscomb, WH AF Maslowski, W Lipscomb, WH TI High resolution simulations of Arctic sea ice, 1979-1993 SO POLAR RESEARCH LA English DT Article; Proceedings Paper CT Workshop on Sea Ice Extent and the Global Climate System CY APR 15-17, 2002 CL TOULOUSE, FRANCE SP World Climate Res Programme, Artic Climate Syst Study, World Climate Res Programme, Climate & Cryosphere Projects ID THICKNESS DISTRIBUTION; OCEAN; MODEL AB To evaluate improvements in modelling Arctic sea ice, we compare results from two regional models at 1/12degrees horizontal resolution. The first is a coupled ice-ocean model of the Arctic Ocean, consisting of an ocean model (adapted from the Parallel Ocean Program, Los Alamos National Laboratory [LANL]) and the "old" sea ice model. The second model uses the same grid but consists of an improved "new" sea ice model (LANL/ CICE) with a simple ocean mixed layer. Both models are forced with European Centre for Medium-range Weather Forecasts reanalysis data for 1979-1993. A comparison of the two sea ice models focuses on the winter of 1987 to emphasize the internal ice stress and to minimize biases towards a particular Arctic climate regime. The "new" sea ice model gives improved ice deformation and drift fields. These improvements are associated at least in part with the multi-category representation of the ice thickness distribution and more realistic parameterization of the ice strength. Long, narrow features in ice divergence and shear fields resemble those observed in SAR imagery, except that their average width is overestimated, possibly due to insufficient horizontal resolution. We also compare the mean sea ice drift and its decadal variability in two "old" sea ice models at different horizontal resolutions: 18-km and 9-km. We find no significant change in ice drift between the two models, except in areas of significant ice-ocean interactions due to more realistic ocean currents and water mass properties in the 9-km model. C1 USN, Postgrad Sch, Dept Oceanog, Monterey, CA 93943 USA. Los Alamos Natl Lab, T3 Fluid Dynam Grp, Los Alamos, NM 87545 USA. RP Maslowski, W (reprint author), USN, Postgrad Sch, Dept Oceanog, 833 Dyer Rd, Monterey, CA 93943 USA. EM maslowsk@nps.nayy.mil NR 24 TC 32 Z9 33 U1 3 U2 7 PU CO-ACTION PUBLISHING PI JARFALLA PA RIPVAGEN 7, JARFALLA, SE-175 64, SWEDEN SN 0800-0395 J9 POLAR RES JI Polar Res. PY 2003 VL 22 IS 1 BP 67 EP 74 DI 10.1111/j.1751-8369.2003.tb00097.x PG 8 WC Ecology; Geosciences, Multidisciplinary; Oceanography SC Environmental Sciences & Ecology; Geology; Oceanography GA 696WB UT WOS:000183909600010 ER PT J AU Ulfig, K Plaza, G Worsztynowicz, A Manko, T Tien, AJ Brigmon, RL AF Ulfig, K Plaza, G Worsztynowicz, A Manko, T Tien, AJ Brigmon, RL TI Keratinolytic fungi as indicators of hydrocarbon contamination and bioremediation progress in a petroleum refinery SO POLISH JOURNAL OF ENVIRONMENTAL STUDIES LA English DT Article DE keratinolytic fungi; petroleum contamination; bioremediation; indicators AB Keratinolytic fungi were examined in soil heavily contaminated with petroleum waste during long-term bioremediation in a biopile at the Czechowice Oil Refinery located in southern Poland. Soil chemistry and associated microbiological parameters were monitored for 39 months to assess the bioremediation process at this site. These fungi were found to occur relatively frequently in the biopile, with the geophilic dermatophyte, Trichophyton ajelloi (teleomorph Arthroderma uncinatum) as the predominant fungal species. Fungal growth was found to depend on the concentration of petroleum hydrocarbons and their polar derivatives in soil. Results demonstrate that the keratinolytic fungi are a potential tool for assessment of soil petroleum hydrocarbon contamination and associated bioremediation progress. C1 Inst Ecol Ind Areas, PL-40832 Katowice, Poland. Westinghouse Savannah River Co, Savannah River Technol Ctr, Environm Biotechnol Sect, Aiken, SC 29808 USA. Holcim Grp Support Ltd, Corp Ind Ecol, CH-51113 Holderbank, Switzerland. RP Ulfig, K (reprint author), Inst Ecol Ind Areas, Kossutha St 6, PL-40832 Katowice, Poland. NR 18 TC 9 Z9 10 U1 0 U2 0 PU HARD PI OLSZTYN 5 PA POST-OFFICE BOX, 10-718 OLSZTYN 5, POLAND SN 1230-1485 J9 POL J ENVIRON STUD JI Pol. J. Environ. Stud. PY 2003 VL 12 IS 2 BP 245 EP 250 PG 6 WC Environmental Sciences SC Environmental Sciences & Ecology GA 665YG UT WOS:000182148400017 ER PT S AU Schmidt, D Pianetta, P AF Schmidt, D Pianetta, P BE Fuyuki, T Sameshima, T Strunk, HP Werner, JH TI Fabrication and characterization of ultra-small polycrystalline silicon islands for advanced multi-level silicon-on-insulator applications SO POLYCRYSTALLINE SEMICONDUCTORS VII, PROCEEDINGS SE Solid State Phenomena LA English DT Article; Proceedings Paper CT 7th International Conference on Polycrystalline Semiconductors CY SEP 10-13, 2002 CL NARA, JAPAN DE annealing; absorption; polycrystalline silicon; single-crystal ID GROWTH AB Polycrystalline silicon is a key component of integrated circuit technology, micromechanical systems and displays. High-mobility silicon thin-film transistors are replacing amorphous-silicon transistors in advanced active-matrix displays, and are also vital to the emerging fields of microsensors and microactuators [1]. In this study, the deposition processes of silicon thin films were carefully studied and the basic kinetics were analyzed. The films were patterned into submicron islands and the relation of the deposition temperature versus the crystallinity of silicon islands was observed. A "threshold" deposition temperature for silicon crystals larger than 0.35 mum was found. The relationships of silicon crystal sizes vs. annealing temperature and vs. annealing duration were also systematically studied. Silicon islands of similar to0.1 mum lateral dimensions were successfully fabricated by e-beam lithography and several types of annealings were performed to increase micro-crystal size, with the goal of creating single-crystal high-mobility islands. Theoretically, transistors built from such islands should match the performance of state-of-the-art bulk devices. The crystal size was measured using Transmission Electron Microscopy and Atomic Force Microscopy analysis. Finally, Extended X-ray Absorption Fine Structure, measurements at the Stanford Synchrotron Radiation Lab were employed to study the crystallization processes of silicon films and the correlation between the absorption curves, the thin-film electrical properties and the silicon grain sizes. C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RP Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. EM Etruscan@stanford.edu NR 7 TC 0 Z9 0 U1 1 U2 2 PU TRANS TECH PUBLICATIONS LTD PI DURNTEN-ZURICH PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND SN 1012-0394 BN 3-908450-79-9 J9 SOLID STATE PHENOMEN PY 2003 VL 93 BP 441 EP 446 PG 6 WC Materials Science, Multidisciplinary; Materials Science, Coatings & Films; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA BX51J UT WOS:000185572600066 ER PT J AU Goth-Goldstein, R Erdmann, CA Russell, M AF Goth-Goldstein, R Erdmann, CA Russell, M TI Cytochrome P4501B1 expression in normal breast tissue SO POLYCYCLIC AROMATIC COMPOUNDS LA English DT Article DE breast cancer; cytochrome P4501A1; cytochrome P4501B1; metabolic activation; polycyclic aromatic hydrocarbons ID ARYL-HYDROCARBON RECEPTOR; MAMMARY EPITHELIAL-CELLS; GENETIC-POLYMORPHISM; METABOLIC-ACTIVATION; CYP1A1 EXPRESSION; AH RECEPTOR; CANCER; 1B1; TUMORS; 4-HYDROXYLATION AB Polycyclic aromatic hydrocarbons (PAHs) are metabolically activated to ultimate carcinogens by the cytochrome P-450 isozymes CYP1A1 and CYP1B1. High levels of these enzymes may result in increased DNA adduct formation and cancer initiation. We investigated whether expression of CYP1B1 in breast tissue varies to a similar extent as has been shown for CYP1A1 and whether increased CYP1B1 expression could constitute a risk factor for breast cancer Expression of CYP1B1 and CYP1A1 was measured in a collection of 75 nontumor epithelial breast tissue specimens from breast cancer patients (n = 36) and from cancer-free individuals (n = 39). Using a semiquantitative reverse-transcription (RT)-polymerase chain reaction (PCR) assay, CYP1B1 and CYP1A1 expression levels relative to the constantly expressed beta-actin gene were determined. In this study, we found 300-fold and 1,000-fold interindividual variation in expression for CYP1B1 and CYP1A1, respectively. The mean CYP1B1 transcript level in normal breast tissue was 70% higher in mastectomy patients compared with cancer-free individuals (p = .0473). These data suggest that CYP1B1 may play a role in breast cancer etiology, particularly in women exposed to high levels of CYP1B1 substrates such as PAHs. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, Berkeley, CA 94720 USA. RP Goth-Goldstein, R (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Environm Energy Technol Div, 1 Cyclotron Rd,70-108B, Berkeley, CA 94720 USA. NR 43 TC 1 Z9 1 U1 0 U2 0 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1040-6638 J9 POLYCYCL AROMAT COMP JI Polycycl. Aromat. Compd. PY 2003 VL 23 IS 3 BP 259 EP 275 DI 10.1080/10406630390215154 PG 17 WC Chemistry, Organic SC Chemistry GA 698BD UT WOS:000183977000002 ER PT J AU Song, JM Jagannathan, R Stokes, DL Vo-Dinh, T Hajaligol, MR AF Song, JM Jagannathan, R Stokes, DL Vo-Dinh, T Hajaligol, MR TI Real-time monitoring of polycyclic aromatic hydrocarbons in cigarette smoke using time-resolved laser-induced fluorescence SO POLYCYCLIC AROMATIC COMPOUNDS LA English DT Article DE cigarette smoke; polycyclic aromatic hydrocarbons; time-gated laser-induced fluorescence ID TOBACCO-SMOKE; HIGH-TEMPERATURES; PYROLYSIS AB Cigarette smoke contains a large number of chemicals and gaseous compounds including polycyclic aromatic hydrocarbons (PAHs). Due to the importance of PAHs and their health effects in cigarettes, development of systems to analyze PAHs in cigarette smoke may become useful in developing a less harmful product. However, the complexity of cigarette smoke chemistry remains a significant obstacle in its analysis: many cigarette smoke components are produced due to reactions such as decomposition and recombination of cigarette components during the smoking process. Methods to analyze these reactions in real-time are needed. In this article the authors report direct monitoring of pyrene in mainstream smoke using time-gated laser-induced fluorescence (LIF) based on fiber optics. The time-gated detection system could provide a reduced background signal of mainstream smoke when using optimized gate delay and gate width parameters. The results demonstrate the feasibility of direct monitoring of PAHs in mainstream smoke. C1 Oak Ridge Natl Lab, Div Life Sci, Adv Biomed Sci & Technol Grp, Oak Ridge, TN 37831 USA. Philip Morris Inc, Philip Morris Res Ctr, Richmond, VA USA. RP Vo-Dinh, T (reprint author), Oak Ridge Natl Lab, Div Life Sci, Adv Biomed Sci & Technol Grp, POB 2008, Oak Ridge, TN 37831 USA. NR 17 TC 4 Z9 5 U1 0 U2 4 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND SN 1040-6638 J9 POLYCYCL AROMAT COMP JI Polycycl. Aromat. Compd. PY 2003 VL 23 IS 4 BP 429 EP 439 DI 10.1080/10406630390233523 PG 11 WC Chemistry, Organic SC Chemistry GA 733ZT UT WOS:000186031300005 ER PT J AU Giesbrecht, GR Gordon, JC Clark, DL Hijar, CA Scott, BL Watkin, JG AF Giesbrecht, GR Gordon, JC Clark, DL Hijar, CA Scott, BL Watkin, JG TI Neutral and anionic transition metal complexes supported by decafluorodiphenylamido ligands: X-ray crystal structures of {Na(THF)(2)}{Ti[N(C6F5)(2)](4)}, {K(eta(6)-C6H5Me)(2)}{ZrCl2[N(C6F5)(2)](3)}, K{VCl[N(C6F5)(2)](3)}, Fe[N(C6F5)(2)](2)(THF)(2) and Co[N(C6F5)(2)](2)(py)(2) SO POLYHEDRON LA English DT Article DE decafluorodiphenylamido; titanium; zirconium; vanadium; iron; cobalt ID CHELATING DIAMIDE COMPLEXES; M = MN; POLYMERIZATION CATALYSTS; ALKALI-METAL; <(C6F5NCH2CH2)(3)N>(3-) LIGAND; 3-COORDINATE MOLYBDENUM(III); LIVING POLYMERIZATION; ZIRCONIUM COMPLEXES; ALPHA-OLEFINS; GAS-PHASE AB Reaction of MN(C6F5)(2) (M = Na, K) with transition metal halides results in the formation of transition metal complexes incorporating decafluorodiphenylamido ligands. TiCl3(THF)(3) reacts with 3 equiv. NaN(C6F5)(2) to yield the 'metallate' complex {Na(THF)(2)}{Ti[N(C6F5)(2)](4)} (1). Single crystal X-ray diffraction studies reveal a tetrahedral titanium center complexed by four decafluorodiphenylamido ligands; while two THF ligands and four fluorine atoms coordinate the sodium cation. ZrCl4 reacts with 3 equiv. KN(C6F5)(2) to give {K(eta(6)-C7H8)(2)}{ZrCl2[N(C6F5)(2)](3)} (2). The F-19 NMR spectrum of 2 reveals phenyl resonances in a 2:1 ratio, consistent with a trigonal bipyramidal structure being maintained in solution. The crystal structure of 2 reveals a pseudooctahedral structure, with the sixth-coordination site being completed by a weak Zr-F interaction with a pentafluorophenyl group of an amido ligand. The potassium counterion interacts in an eta(6) fashion with two toluene rings in addition to a fluorine atom arising from one of the pentafluorophenyl groups. The reaction Of VCl3 with 3 equiv. KN(C6F5)(2) generates the 'metallate' complex K{VCl[N(C6F5)(2)](3)} (3); the solid state structure of 3 reveals a distorted trigonal bipyramid with the coordination sphere being completed by a weak V-F interaction with the ortho-fluorine of one of the fluorophenyl amido ligands. Exposure of FeCl3 to 3 ;equiv. KN(C6F5)(2) results in reduction of the metal center and the formation of the Fe(II) species Fe[N(C6F5)(2)](2)(THF)(2) (4). Compound 4 is tetrahedral in the solid state with none of the weak M-F contacts observed for 1, 2, 3 and 5. COI2 reacts with 2 equiv. NaN(C6F5)(2) in the presence of pyridine to produce the expected product Co[N(C6F5)(2)](2)(py)(2) (5); X-ray crystallography reveals a five-coordinate species in the solid state which is additionally stabilized by a weak Co-F interaction. (C) 2002 Elsevier Science Ltd. All rights reserved. C1 Los Alamos Natl Lab, Chem Div C, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Nucl Mat Technol, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Glenn T Seaborg Inst Transactinium Sci, Los Alamos, NM 87545 USA. RP Gordon, JC (reprint author), Los Alamos Natl Lab, Chem Div C, POB 1663, Los Alamos, NM 87545 USA. RI Clark, David/A-9729-2011; Scott, Brian/D-8995-2017 OI Scott, Brian/0000-0003-0468-5396 NR 84 TC 12 Z9 12 U1 0 U2 3 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0277-5387 J9 POLYHEDRON JI Polyhedron PD JAN 1 PY 2003 VL 22 IS 1 BP 153 EP 163 AR PII S0277-5387(02)01258-5 DI 10.1016/S0277-5387(02)01258-5 PG 11 WC Chemistry, Inorganic & Nuclear; Crystallography SC Chemistry; Crystallography GA 638UM UT WOS:000180589900017 ER PT J AU Hoffman, DM AF Hoffman, DM TI Dynamic mechanical signatures of Viton A and plastic bonded explosives based on this polymer SO POLYMER ENGINEERING AND SCIENCE LA English DT Article ID POLY(VINYLIDENE FLUORIDE); FLUOROELASTOMERS; RELAXATION; CRYSTALLIZATION AB The complex shear moduli of the fluoroelastomer Viton A and four plastic bonded explosives LX-04, LX-07, LX-10 and LX-11, which use this polymer as a binder, have been investigated. LX-10, LX-07, LX-04 and LX-11 are composites of 94.5, 90, 85 and 80% 1, 3, 5, 7-tetranitroazacyclooctane (HMX) explosive, respectively, and Viton A. Viton is a random copolymer of 7 vinylidene fluoride and 2 perfluoro-propene monomers. In the temperature range from -150 to 120degreesC, two relaxations, the beta relaxation at -80degreesC and the glass transition at -22degreesC, were observed as peaks in the loss modulus in Viton A at 0.1 Hz. A third relaxation, T-alpha, was found above T-g in all four explosive formulations. The plastic bonded explosives (PBX's) showed antiplasticization phenomena. T-g of the explosives increased 2-3degreesC as the concentration of binder was reduced in 5% steps. Samples from the same original lot of LX-04 were evaluated after 20-23 years of service. The alpha relaxation occurred at 60degreesC as a peak in the loss modulus at 1 Hz. Both the beta and alpha relaxations were very broad and an accurate maximum for these relaxations was difficult to determine. C1 Lawrence Livermore Natl Lab, Energet Mat Ctr, Livermore, CA 94550 USA. RP Hoffman, DM (reprint author), Lawrence Livermore Natl Lab, Energet Mat Ctr, Livermore, CA 94550 USA. NR 44 TC 20 Z9 21 U1 0 U2 7 PU SOC PLASTICS ENG INC PI BROOKFIELD PA 14 FAIRFIELD DR, BROOKFIELD, CT 06804-0403 USA SN 0032-3888 J9 POLYM ENG SCI JI Polym. Eng. Sci. PD JAN PY 2003 VL 43 IS 1 BP 139 EP 156 PG 18 WC Engineering, Chemical; Polymer Science SC Engineering; Polymer Science GA 643LR UT WOS:000180863200013 ER PT S AU Mukkamala, R Kushner, AM Bertozzi, CR AF Mukkamala, R Kushner, AM Bertozzi, CR BE Bohidar, HB Dubin, P Osada, Y TI Hydrogel polymers from alkylthio acrylates for biomedical applications SO POLYMER GELS: FUNDAMENTALS AND APPLICATIONS SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on Polymers Gels CY MAR 26-30, 2000 CL SAN FRANCISCO, CALIFORNIA SP Amer Chem Soc ID PENDANT MONOSACCHARIDES; PROTEIN ADSORPTION; SURFACE; SULFOXIDE) AB We have developed new acrylate monomers having pendent sulfide, sulfoxide and sulfone functional groups, and their cross-linked hydrogel polymers. Herein, the physicochemical characteristics including bulk and surface hydrophilicity, affinity for protein adsorption on the surfaces of these hydrogels are discussed. The sulfoxide hydrogels possess high degree of hydrophilicity and low affinity for in-vitro protein adsorption on their surfaces, thus showing potential to be new materials for use in biomedical applications, especially for soft contact lens preparation. Our results show that replacing sulfoxide functionality with sulfide or sulfone groups causes significant changes in polymer properties. Some of the mixed hydrogels derived from sulfide/sulfone acrylates and 2-hydroxyethy methacrylate (HEMA) exhibit low to moderate hydrophilicity, but exceptional resistance to in-vitro protein adsorption. (C) 2003 American Chemical Society. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Mukkamala, R (reprint author), Rohm & Haas Chem Co, Proc Chem Lab, 1900 Tidal Rd, Deer Pk, TX 77536 USA. NR 36 TC 2 Z9 2 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 0-8412-3761-1 J9 ACS SYM SER PY 2003 VL 833 BP 163 EP 174 PG 12 WC Chemistry, Multidisciplinary; Polymer Science SC Chemistry; Polymer Science GA BW36V UT WOS:000181755600011 ER PT J AU Jacob, GC Starbuck, JM Fellers, JF Simunovic, S AF Jacob, GC Starbuck, JM Fellers, JF Simunovic, S TI Energy absorption in chopped carbon fiber epoxy composites for automotive crashworthiness SO POLYMER JOURNAL LA English DT Article DE crashworthiness; energy absorption; composite materials; crush testing; plates; chopped fiber; carbon epoxy ID CRUSHING CHARACTERISTICS; TUBES; CAPABILITY; BEHAVIOR; SECTIONS; STRAIN; SPEED AB In the crashworthiness of automotive structures, the primary issues to the automotive industry are the overall economy and the weight of the material. To reduce the weight and improve the fuel economy, polymer composite materials have replaced more and more metal parts in vehicles. They have the added benefit of being able to dissipate large amounts of impact energy by progressive crushing. To identify and quantify the energy absorbing mechanisms in candidate automotive composite materials, test methodologies were developed for conducting progressive crush tests on composite plate specimens. The test method development and experimental set-up focused on isolating the damage modes associated with the frond formation that occurs in dynamic testing of composite tubes. Quasi-static progressive crush tests were performed to quantify the effects of specimen width, profile radius and profile constraint on the specific energy absorption and failure modes of composite plates manufactured from chopped carbon fiber (CCF) with an epoxy resin system using compression molding techniques. The carbon fiber was Toray T700 and the epoxy resin was YLA RS-35. It was demonstrated during testing that the use of a roller constraint directed the crushing process and the load deflection curves were similar to the progressive crushing of tubes. Modifications to the basic specimen geometry were required when testing material systems that have low axial stiffness to prevent a global buckling mode. The experimental data in conjunction with the test observations were used to develop analytical models for predicting the crashworthiness of automotive composite structures. C1 Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Polymer Matrix Composites Grp, Div Met & Ceram, Oak Ridge, TN 37831 USA. Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Computat Mat Sci Comp Sci & Math Div, Oak Ridge, TN 37831 USA. RP Jacob, GC (reprint author), Univ Tennessee, Dept Mat Sci & Engn, 434 Dougherty Engn, Knoxville, TN 37996 USA. EM gjacob@utk.edu RI Starbuck, James/E-1442-2017 OI Starbuck, James/0000-0002-3814-9156 NR 45 TC 1 Z9 1 U1 1 U2 12 PU NATURE PUBLISHING GROUP PI NEW YORK PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA SN 0032-3896 J9 POLYM J JI Polym. J. PY 2003 VL 35 IS 7 BP 560 EP 567 DI 10.1295/polymj.35.560 PG 8 WC Polymer Science SC Polymer Science GA 718KP UT WOS:000185144600003 ER PT J AU Kim, J Cho, J Ryba, E Bai, J AF Kim, J Cho, J Ryba, E Bai, J TI Interfacial structures of polyurethane thin films on various substrate materials SO POLYMER JOURNAL LA English DT Article DE substrate-induced ordering; polyurethane thin film; grazing incidence X-ray diffraction ID EPITAXIAL CRYSTALLIZATION; RIGID POLYURETHANE; POLYPROPYLENE; MELT; TRANSCRYSTALLIZATION; POLYMERS; ADHESION; STRENGTH AB Grazing incidence X-ray diffraction (GIXD) was performed on three polyurethane films, prepared with polyol OH number of 120, 375, and 600 cast on various substrates, such as silicon, gold, glass, sodium chloride, and zinc phosphated steel. Surface topography did not affect the structural variation of polyurethane films along with the film depth controlled by an angle of incidence. Change of the crystallinity was occurred by a simultaneous change of interplanar spacing, indicating that substrate-induced crystallization took place. The depth that the substrate surface influenced the crystallization of the polyurethane films corresponded to the halfway of the variation of interplanar spacing. The substrate-induced ordering of the polyurethane films varied according to the substrate surface conditions, presumably depending on the attraction force forward the heterogeneities inside the polymer bulk film. It was suggested that the substrate-induced crystallization of the polyurethane on the various substrates depends on the mobility of heterogeneities toward the polar substrate surface rather than other possible mechanisms such as temperature gradient, chemical similarity, lattice match, and thermal shear stress. C1 Oak Ridge Natl Lab, High Temp Mat Lab, Oak Ridge, TN 37831 USA. Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA. RP Kim, J (reprint author), Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA. EM jangskim@lgchem.com RI Bai, Jianming/O-5005-2015 NR 20 TC 1 Z9 1 U1 0 U2 7 PU SOC POLYMER SCIENCE JAPAN PI TOKYO PA TSUKIJI DAISAN NAGAOKA BLDG, 2-4-2 TSUKIJI, CHUO-KU, TOKYO, 104, JAPAN SN 0032-3896 J9 POLYM J JI Polym. J. PY 2003 VL 35 IS 12 BP 929 EP 937 DI 10.1295/polymj.35.929 PG 9 WC Polymer Science SC Polymer Science GA 774QD UT WOS:000188993700004 ER PT S AU Rasmussen, KO Kober, EM Lookman, T Saxena, A AF Rasmussen, KO Kober, EM Lookman, T Saxena, A BE Manias, E Malliaras, GG TI Bridging properties of multiblock copolymers SO POLYMER/METAL INTERFACES AND DEFECT MEDIATED PHENOMENA IN ORDERED POLYMERS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Polymer/Metal Interfaces and Defect Mediated Phenomena in Ordered Polymers held at the 2002 MRS Fall Meeting CY DEC 02-06, 2002 CL BOSTON, MA SP Mat Res Soc ID TRIBLOCK COPOLYMER; MORPHOLOGY; PHASE AB Using self-consistent field theory, we attempt to elucidate the links between microscopically determined properties, such as the bridging fraction of chains, and mechanical properties of multiblock copolymer materials. We determine morphological aspects such as period and interfacial width and calculate the bridging fractions, and compare with experimental data. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Rasmussen, KO (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RI Rasmussen, Kim/B-5464-2009 OI Rasmussen, Kim/0000-0002-4029-4723 NR 16 TC 0 Z9 0 U1 0 U2 1 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-671-0 J9 MATER RES SOC SYMP P PY 2003 VL 734 BP 431 EP 436 PG 6 WC Materials Science, Multidisciplinary; Materials Science, Characterization & Testing; Polymer Science SC Materials Science; Polymer Science GA BW65U UT WOS:000182707900064 ER PT J AU Sugama, T Gawlik, K AF Sugama, T Gawlik, K TI Milled carbon microfiber-reinforced poly(phenylenesulfide) coatings for abating corrosion of carbon steel SO POLYMERS & POLYMER COMPOSITES LA English DT Article AB Effectiveness of milled carbon microfibers, 7.5 mum in diameter and 100-200 mum long, in increasing the thermal conductivity, tensile strength, and elongation of fiber-reinforced poly(phenylenesulfide) (PPS) composite coatings was investigated. Thermal conductivity depended on the fiber content of the composites; the maximum content (5 wt% fiber) was responsible for a 2.6-fold enhancement over that of non-reinforced ones. However, the most effective amount of fiber in improving the tensile strength and elongation of the composition coating films was 3 wt%, reflecting 5.2 times and 2.6 times improvements, respectively, compared with those of the non-reinforced ones. The composite coatings adequately protected the underlying carbon steel against corrosion in 250degreesC CO2-laden brine. The reason for their great hydrothermal stability was the conformational changes in the molecular structure of PPS, from sulfide bridging to sulfone bridging, which increased the thermal stability of the matrix. C1 Brookhaven Natl Lab, Energy Resources Div, Energy Sci & Technol Dept, Upton, NY 11973 USA. Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Sugama, T (reprint author), Brookhaven Natl Lab, Energy Resources Div, Energy Sci & Technol Dept, Upton, NY 11973 USA. NR 8 TC 4 Z9 6 U1 1 U2 1 PU RAPRA TECHNOLOGY LTD PI SHREWSBURY PA SHAWBURY, SHREWSBURY SY4 4NR, SHROPS, ENGLAND SN 0967-3911 J9 POLYM POLYM COMPOS JI Polym. Polym. Compos. PY 2003 VL 11 IS 3 BP 161 EP 169 PG 9 WC Materials Science, Characterization & Testing; Materials Science, Composites; Polymer Science SC Materials Science; Polymer Science GA 667TV UT WOS:000182250100001 ER PT B AU Kogerler, P Muller, A AF Kogerler, P Muller, A BE BorrasAlmenar, JJ Coronado, E Muller, A Pope, M TI Combinatorially linkable metal-oxide based units: Perspectives for nano, supramolecular, and solid-state chemistry SO POLYOXOMETALATED MOLECULAR SCIENCE SE NATO SCIENCE SERIES, SERIES II: MATHEMATICS, PHYSICS AND CHEMISTRY LA English DT Proceedings Paper CT NATO-Advanced-Study-Institute on Polyoxometalate Molecular Science Conference CY AUG 25-SEP 04, 2001 CL TENERIFE, SPAIN SP NATO Adv Study Inst, NATO, Sci Affairs Div, Spain Minist Ciencia Tecnol DE clusters; polyoxometalates; topology; self-assembly; nanochemistry ID MOLYBDENUM-OXIDE; BUILDING-BLOCKS; GIANT CLUSTER; POLYOXOMETALATE CHEMISTRY; INORGANIC-CHEMISTRY; SPHERICAL CLUSTER; ROOM-TEMPERATURE; MOLECULAR GROWTH; SPHERES; CENTERS C1 Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. RP Kogerler, P (reprint author), Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA. RI icmol, icmol/I-5784-2015; Kogerler, Paul/H-5866-2013 OI Kogerler, Paul/0000-0001-7831-3953 NR 64 TC 7 Z9 7 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 1-4020-1241-1 J9 NATO SCI SER II MATH PY 2003 VL 98 BP 297 EP 323 PG 27 WC Chemistry, Inorganic & Nuclear SC Chemistry GA BY48G UT WOS:000189346400010 ER PT B AU Anderson, IE Terpstra, RL Figliola, R AF Anderson, IE Terpstra, RL Figliola, R BE Marquis, FDS TI Analysis of gas recirculation flow effects in the melt feeding zone of a close-coupled gas atomization nozzle SO POWDER MATERIALS: CURRENT RESEARCH AND INDUSTRIAL PRACTICES III LA English DT Proceedings Paper CT International Symposium on Powder Materials - Current Research and Industrial Practices III held at the Materials Science and Technology Meeting CY NOV 09-12, 2003 CL CHICAGO, IL SP TMS Powder Mat Comm ID HIGH-VELOCITY GASES AB This investigation sought to determine the influences of gas jet apex angle and gas supply pressure on the strength of recirculation backflow in a discrete jet, close-coupled gas atomization nozzle. The uniform distribution of melt flow to the periphery of the melt delivery tube is one of the most critical aspects of close-coupled gas atomization to promote the maximum primary atomization effect at elevated gas velocities. Experiments have indicated that a strong gas recirculation backflow in the wake region of the melt feed tip is needed to drive the melt distribution phenomena and that the recirculation flow is sensitive to specific nozzle configurations and operating parameters. Miniature gas flow pressure probes have permitted dynamic pressure measurements for calculation of recirculation (upstream) velocity data that can be used to validate computational fluid dynamics (CFD) simulations. Experiments indicated that the probe technique was most reliable for near-field upstream velocity in the melt tip wake, especially the peak in upstream velocity, which reached nearly 280 m/s (Mach 0.79) for N-2 gas for one set of parameters. The results provide insight about previous experiments and guided nozzle redesign efforts, which lead to a subsequent gas atomization trial on pure Cu with N-2 gas. Preliminary correlation of high-speed photographs of the atomized sprays with the upstream velocity measurements provided further understanding about the flow dynamics needed to enable a gas atomization process with high uniformity for atomization model verification and for highly selective powder production. C1 Iowa State Univ Sci & Technol, Ames Lab, US DOE, Ames, IA 50011 USA. RP Anderson, IE (reprint author), Iowa State Univ Sci & Technol, Ames Lab, US DOE, Ames, IA 50011 USA. NR 22 TC 0 Z9 0 U1 3 U2 4 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086-7514 USA BN 0-87339-563-8 PY 2003 BP 3 EP 20 PG 18 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA BY44V UT WOS:000189295600001 ER PT B AU Terpstra, RL Anderson, IE Gleeson, B AF Terpstra, RL Anderson, IE Gleeson, B BE Marquis, FDS TI Metallic filters for hot gas clean-up SO POWDER MATERIALS: CURRENT RESEARCH AND INDUSTRIAL PRACTICES III LA English DT Proceedings Paper CT International Symposium on Powder Materials - Current Research and Industrial Practices III held at the Materials Science and Technology Meeting CY NOV 09-12, 2003 CL CHICAGO, IL SP TMS Powder Mat Comm DE hot gas filters; vacuum sintering; nickel based super alloys AB Compared to ceramic filters, metallic filters can offer increased resistance to impact and thermal fatigue, greatly improving filter reliability. Successful development of metallic filters with high temperature oxidation/corrosion resistance for fly-ash capture is a key to enabling advanced coal combustion and power generation technologies. A beneficial metallic filter structure, composed of a thin wall (similar to0.5mm) tube with uniform porosity (similar to30%), is being developed using a unique spherical powder processing and partial sintering approach, combined with porous sheet rolling and resistance welding. Alloy choices based on modified superalloys, e.g., Ni-16Cr-4.5Al-3Fe (wt%), are being tested in porous and bulk forms for oxide (typically alumina) scale stability in simulated oxidizing/sulfidizing atmospheres found in advanced combustion systems. New studies are exploring the correlation between sintered microstructure, tensile strength, and permeability of porous sheet samples. C1 Iowa State Univ Sci & Technol, Ames Lab, Met & Ceram Sci Program, US DOE, Ames, IA 50011 USA. RP Terpstra, RL (reprint author), Iowa State Univ Sci & Technol, Ames Lab, Met & Ceram Sci Program, US DOE, Ames, IA 50011 USA. NR 11 TC 0 Z9 0 U1 0 U2 1 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086-7514 USA BN 0-87339-563-8 PY 2003 BP 33 EP 46 PG 14 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA BY44V UT WOS:000189295600005 ER PT B AU Smugeresky, JE Grylls, R Keicher, DM Robino, C AF Smugeresky, JE Grylls, R Keicher, DM Robino, C BE Marquis, FDS TI Qualification of model based LENSTM materials processing SO POWDER MATERIALS: CURRENT RESEARCH AND INDUSTRIAL PRACTICES III LA English DT Proceedings Paper CT International Symposium on Powder Materials - Current Research and Industrial Practices III held at the Materials Science and Technology Meeting CY NOV 09-12, 2003 CL CHICAGO, IL SP TMS Powder Mat Comm C1 Sandia Natl Labs, Livermore, CA USA. RP Smugeresky, JE (reprint author), Sandia Natl Labs, Livermore, CA USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086-7514 USA BN 0-87339-563-8 PY 2003 BP 259 EP 259 PG 1 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA BY44V UT WOS:000189295600031 ER PT B AU Foley, JC Abeln, SP Stanek, PW Bartram, BD Vargas, VD Aikin, B AF Foley, JC Abeln, SP Stanek, PW Bartram, BD Vargas, VD Aikin, B BE Marquis, FDS TI An overview of current research and industrial practices of be powder metallurgy SO POWDER MATERIALS: CURRENT RESEARCH AND INDUSTRIAL PRACTICES III LA English DT Proceedings Paper CT International Symposium on Powder Materials - Current Research and Industrial Practices III held at the Materials Science and Technology Meeting CY NOV 09-12, 2003 CL CHICAGO, IL SP TMS Powder Mat Comm C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Foley, JC (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU MINERALS, METALS & MATERIALS SOC PI WARRENDALE PA 184 THORN HILL RD, WARRENDALE, PA 15086-7514 USA BN 0-87339-563-8 PY 2003 BP 263 EP 263 PG 1 WC Metallurgy & Metallurgical Engineering SC Metallurgy & Metallurgical Engineering GA BY44V UT WOS:000189295600032 ER PT B AU Kirbie, HC Hawkins, HT AF Kirbie, HC Hawkins, HT BE Giesselmann, M Neuber, A TI The role of pulsed power in international security and counterterrorism SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Advanced technologies, including pulsed power, play a vital role in preserving domestic and international security while working to counter terrorism. However, technology is not a universal sword and shield against terrorism. Technical countermeasures to terrorist activities must be cost effective and applied with some wisdom about terrorist objectives. The following paper features insightful perspectives on terrorism and terrorist organizations. The role of science and technology, as a tool against terrorism, is also discussed and examples of applied pulsed power technology are presented. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Kirbie, HC (reprint author), Los Alamos Natl Lab, POB 1663,Mail Stop H851, Los Alamos, NM 87545 USA. NR 22 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 13 EP 20 PG 8 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000003 ER PT B AU Newton, MA Kamm, RE Fulkerson, ES Hulsey, SD Lao, N Parrish, GL Pendleton, DL Petersen, DE Polk, M Tuck, JM Ullery, GT Moore, WB AF Newton, MA Kamm, RE Fulkerson, ES Hulsey, SD Lao, N Parrish, GL Pendleton, DL Petersen, DE Polk, M Tuck, JM Ullery, GT Moore, WB BE Giesselmann, M Neuber, A TI Initial activation and operation of the power conditioning system for the National Ignition Facility SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB The National Ignition Facility (NIF) Power Conditioning System (PCS) is a modular capacitive energy storage system that will be capable of storing nearly 400 MJ of electrical energy and delivering that energy to the nearly 8000 flashlamps in the NIF laser. The first sixteen modules of the power conditioning system have been built, tested and installed. Activation of the first nine power conditioning modules has been completed and commissioning of the first "bundle" of laser beamlines has begun. This paper will provide an overview of the power conditioning system design and describe the status and results of initial testing and activation of the first "bundle" of power conditioning modules. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Newton, MA (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 93 EP 96 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000019 ER PT B AU Reinovsky, RE Atchison, WL Faehl, RJ Lindemuth, IR AF Reinovsky, RE Atchison, WL Faehl, RJ Lindemuth, IR BE Giesselmann, M Neuber, A TI Advanced liner performance for extended experiments in hydrodynamics and material properties SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Over the last few years a new application for high performance pulsed power technology has joined the family of traditional radiation source applications. This new application uses the magnetic fields from large current pulses to implode near-solid density cylindrical liners, with very high precision, for the study of material properties and hydrodynamics in complex geometries. The 24-MJ Atlas pulsed power system, operated since September 2001 in Los Alamos, has employed high-precision liners driven with currents up to 25 MA to conduct a variety of experiments involving the production of moderate to strong shocks to study material failure and the dynamic behavior of an interface at high relative velocities and high normal pressures and the compression of targets in complex geometries to validate sophisticated hydrodynamic simulations. This paper will describe the behavior of the initial liner implosions evaluating the physical cause for the perturbation growth and will describe the later, more uniform, implosions. The paper will attempt to address the physical behaviors that lead to different behaviors in each case. C1 Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Reinovsky, RE (reprint author), Los Alamos Natl Lab, POB 1663,Mail Stop D420, Los Alamos, NM 87544 USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 107 EP 110 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000022 ER PT B AU Tasker, DG Goforth, JH Oona, H Fowler, CM King, JC Herrera, D Torres, D AF Tasker, DG Goforth, JH Oona, H Fowler, CM King, JC Herrera, D Torres, D BE Giesselmann, M Neuber, A TI Advances in isentropic compression experiments (ICE) using high explosive pulsed power SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB We are developing a prototype high explosive pulsed power (HEPP) system to obtain isentropic Equation of State (EOS) data with the Asay technique [1]. Our prototype system comprises a flat-plate explosive driven magnetic flux compression generator (FCG), an explosively formed fuse (EFF) opening switch, and a series of explosively-actuated closing switches. The FCG is capable of producing similar to10 MA into suitable loads, and, at a length of 216 mm, the EFF will sustain voltages in excess of 200 W. The load has an inductance of similar to3 to 10 nH, allowing up to similar to7 MA to be delivered in times of similar to0.5 mus. This prototype will produce isentropic compression profiles in excess of 2 Mbar in a material such as tungsten. Our immediate plan is to obtain isentropic EOS data for copper at pressures up to similar to1.5 Mbar with the prototype system; eventually we hope to reach several tens of Mbar with more advanced systems. C1 Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Tasker, DG (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87544 USA. 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 0-7803-7915-2 PY 2003 BP 111 EP 114 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000023 ER PT B AU Weinbrecht, EA McDaniel, DH Bloomquist, DD AF Weinbrecht, EA McDaniel, DH Bloomquist, DD BE Giesselmann, M Neuber, A TI The Z refurbishment project (ZR) at Sandia National Laboratories SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Sandia's Z accelerator completed original construction in 1985 as PBFA II. The center portion was modified in 1996, converting from a high voltage to a high current configuration to drive z-pinch loads. The environments created have enabled critical experiments that address many Stockpile Stewardship Program (SSP) and High Energy Density Physics (HEDP) program needs. Z has since grown into a multifaceted workhorse facility. At more than 1000 shots after what was to be a provisional modification to assess scaling of z-pinch current, users are asking that Z be a stable, precision platform for a large number and variety of reliable, reproducible experiments. Much of Z was not optimized for z-pinch applications nor designed for the rigors of daily use at today's 18+ MA output level. This paper provides an overview of the Z Refurbishment (ZR) project, including performance criteria, timeline, test and integration strategies, and current status of the project. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Weinbrecht, EA (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 3 TC 4 Z9 6 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 157 EP 162 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000033 ER PT B AU Rosenthal, SE Elizondo, JM Maenchen, JE Struve, KW McDaniel, DH Corley, JP Johnson, DL Oliver, BV AF Rosenthal, SE Elizondo, JM Maenchen, JE Struve, KW McDaniel, DH Corley, JP Johnson, DL Oliver, BV BE Giesselmann, M Neuber, A TI Modeling 6-MV gas switches for the ZR accelerator SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB The "rimfire", or "cascade" gas switch[1], developed at Sandia National Laboratories, presently operates both in Hermes III (in oil with peak voltage of 2.5 MV) and in Z (in water at 4.8 MV). In the proposed ZR accelerator[2] pulse-compression section the switch needs to reliably function (less than 0.2 % probability of pre-fire, and similar to 2.5-ns jitter) at up to 5.5 MV, above any previous operation. We are studying appropriate design enhancements theoretically and in the laboratory[3] on Sandia's Advanced Pulsed Power Research Module (APPRM, 1-MA, 800-ns pulse). C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Rosenthal, SE (reprint author), Sandia Natl Labs, Albuquerque, NM 87185 USA. NR 4 TC 3 Z9 3 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 163 EP 166 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000034 ER PT B AU Woodworth, JR Lehr, J Miller, PA Aragon, B Elizondo-Decanini, J Fowler, W Maenchen, JE Sarkisov, GS Corley, J Hodge, K Drennan, S Guthrie, D Mowrer, G Navarro, M Johnson, DL AF Woodworth, JR Lehr, J Miller, PA Aragon, B Elizondo-Decanini, J Fowler, W Maenchen, JE Sarkisov, GS Corley, J Hodge, K Drennan, S Guthrie, D Mowrer, G Navarro, M Johnson, DL BE Giesselmann, M Neuber, A TI Optical diagnostics of 4-MV water switches in the Z-20 test facility SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB We are studying the behaviour of self-breaking, high voltage water switches for the Z refurbishment project. In Z-20, 3 or 4 water switches in parallel are charged to 4 MV in similar to220 ns. The water gap between switch electrodes is 13-15 cm and the enhancement of the positive and negative electrodes is varied to study current sharing and switch simultaneity. In addition to the standard electrical diagnostics (V, 1) we are looking at one of the switches during the breakdown phase with two optical diagnostics: a streak camera and a fast framing camera. We find that the velocity of the streamers is approximately a linear function of macroscopic electric field, with streamers from positive electrodes having velocities about twice as fast as streamers from negative electrodes. We find that optical closure of the gap correlates well with the beginning of the main current pulse. We demonstrate that only about 2% of the total light emitted by the switches is emitted during the accelerator power pulse. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Woodworth, JR (reprint author), Sandia Natl Labs, Albuquerque, NM 87185 USA. NR 6 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 167 EP 170 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000035 ER PT B AU Elizondo, JM Corley, J Struve, KW Johnson, DL Corcoran, P Prestwich, KR AF Elizondo, JM Corley, J Struve, KW Johnson, DL Corcoran, P Prestwich, KR BE Giesselmann, M Neuber, A TI Water switches impedance from screamer circuit model and experimental waveform match SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Experimental waveforms obtained from the Z-20 water switch test bed at SNL, and PITHON at PSD, are matched with their respective circuit models to determine the equivalent inductance and conduction resistance of water switches. These circuit models and three water switch models, available in SCREAMER, were used to obtain a match to the experimental water switch breakdown current waveforms. In both cases the waveform match is very good and the resulting inductance and conduction resistance values consistent. The equivalent conduction resistance obtained is in the range: 0.064 less than or equal to R (Omega/cm) less than or equal to 0.080, single switch per unit length of switch gap. This match was obtained, with a series of experimental waveforms, out of shots with positive and negative enhanced electrodes from both machines. Excellent experimental to model match was found, for a full series of waveforms, all within the range of resistance values. A series of waveforms are shown together with the details of the switch model and the technique used to determine the resistance values. C1 Sandia Natl Labs, Livermore, CA 94550 USA. RP Elizondo, JM (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA. NR 6 TC 3 Z9 3 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 171 EP 174 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000036 ER PT B AU Pointon, TD Harjes, HC Savage, ME Bliss, DE Lemke, RW AF Pointon, TD Harjes, HC Savage, ME Bliss, DE Lemke, RW BE Giesselmann, M Neuber, A TI Pulse shaping of the load current on the Z accelerator SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB The refurbishment project (ZR) for the Z accelerator at Sandia National Laboratories [1] is required to provide the capability to temporally shape the current pulse at the load, primarily for isentropic compression experiments (ICE) [2]. The baseline design to accomplish this uses staggered triggering of the 36 pulse-forming lines that are added in parallel. With relative timing differences between the lines, and each line run in either a short- or a long-pulse mode, there are many degrees of freedom for achieving a required pulse shape at the load. This approach is currently being evaluated with circuit simulations, 3-D, particle-in-cell (PIC) simulations, and experiments on Z. Results from these experiments have been very successful. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Pointon, TD (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 6 TC 4 Z9 4 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 175 EP 178 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000037 ER PT B AU Bliss, DE Collins, RT Dalton, DG Dawson, EJ Doty, RL Downey, TL Harjes, HC Illescas, EA Knudson, MD Lewis, BA Mills, JA Ploor, SD Podsednik, JW Rogowski, ST Shams, MS Struve, KW AF Bliss, DE Collins, RT Dalton, DG Dawson, EJ Doty, RL Downey, TL Harjes, HC Illescas, EA Knudson, MD Lewis, BA Mills, JA Ploor, SD Podsednik, JW Rogowski, ST Shams, MS Struve, KW BE Giesselmann, M Neuber, A TI A new laser trigger system for current pulse shaping and jitter reduction on Z SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB A new laser trigger system (LTS) has been installed on Z that benefits the experimenter with reduced temporal jitter on the x-ray output, the confidence to use command triggers for time sensitive diagnostics and the ability to shape the current pulse at the load. This paper presents work on the pulse shaping aspects of the new LTS. Pulse shaping is possible because the trigger system is based on 36 individual lasers, one per each pulsed power module, instead of a single laser for the entire machine. The firing time of each module can be individually controlled to create an overall waveform that is the linear superposition of all 36 modules. In addition, each module can be set to a long- or short-pulse mode for added flexibility. The current waveform has been stretched from similar to100 ns to similar to250 ns. A circuit model has been developed with BERTHA Code, which contains the independent timing feature of the new LTS to predict and design pulse shapes. The ability to pulse-shape directly benefits isentropic compression experiments (ICE) and equation of state measurements (EOS) for the shock physics programs at Sandia National Laboratories. With the new LTS, the maximum isentropic loading applied to Cu samples 750 um, thick has been doubled to 3.2 Mb without generating a shockwave. Macroscopically thick sample of A1, 1.5 mm, have been isentropically compressed to 1.7 Mb. Also, shockless Ti flyer-plates have been launched to 21 km.s(-1), remaining in the solid state until impact. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Bliss, DE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 5 TC 7 Z9 7 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 179 EP 182 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000038 ER PT B AU Anderson, DJ Briand, D AF Anderson, DJ Briand, D BE Giesselmann, M Neuber, A TI ZR reliability and operations analysis SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Sandia National Laboratories' Z machine provides a unique capability to a number of National Nuclear Security Administration (NNSA) and basic science communities, and routinely produces x-ray power more than 5 times, and energy 50 times, greater than any other non-pulsed power laboratory device. To address an increasing demand and widening range of research interests, Sandia's Z refurbishment (ZR) program intends to increase Z utilization by providing the capability to double the number of shots per year, improve the overall precision for better reproducibility and enhanced data quality, and increase delivered current to provide additional performance capability. Reliability and operations analysis has been included from the onset of the ZR program to maximize performance and operations capacity. Preliminary analysis using a system-level reliability model highlighted Z failure modes requiring reliability improvement to help meet the increased ZR requirements. Preliminary results from analysis with a developed Z and ZR operations simulation model indicate, from an overall operations perspective including penalty costs and personnel resources, the scheduled maintenance activities and unscheduled repairs most in need of reduced time requirements and rates of occurrence. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Anderson, DJ (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 0 TC 0 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 183 EP 186 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000039 ER PT B AU Rosocha, LA AF Rosocha, LA BE Giesselmann, M Neuber, A TI Non-thermal plasma (NTP) applications to the environment: Gaseous electronics and power conditioning SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc ID DISCHARGE AB For nearly two decades, interest in gas-phase pollution control has greatly increased, arising from a greater respect for the environment, more attention to the effects of pollution, and a larger body of regulations and laws. Non-thermal plasma (NTP) technology shows promise for destroying pollutants in gas streams and cleaning contaminated surfaces, using plasma-generated reactive species (e.g., free radicals). NTPs can generate both oxidative and reductive radicals - showing promise for treating a variety of pollutants, sometimes simultaneously decomposing multiple species. In this paper, some applications of NTP processing for the environment, associated discharge physics and plasma chemistry, and power conditioning systems for driving the NTP reactors will be discussed. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Rosocha, LA (reprint author), Los Alamos Natl Lab, POB 1663,MS E526, Los Alamos, NM 87545 USA. NR 10 TC 0 Z9 0 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 215 EP 220 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000046 ER PT B AU Nunnally, WC Krogh, M Williams, C Allen, F Trimble, D Sampayan, S Caporaso, G AF Nunnally, WC Krogh, M Williams, C Allen, F Trimble, D Sampayan, S Caporaso, G BE Giesselmann, M Neuber, A TI Investigation of vacuum insulator surface dielectric strength with nanosecond pulses SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB The maximum vacuum insulator surface dielectric strength determines the acceleration electric field gradient possible in a short pulse accelerator. Previous work has indicated that higher electric field strengths along the insulator-vacuum interface might be obtained as the pulse duration is decreased [1].. In this work, a 250 W, single ns wide impulse source was applied to small diameter, segmented insulators samples in a vacuum to evaluate the multi-layer surface dielectric strength of the sample construction. Resonances in the low inductance test geometry were used to obtain unipolar, pulsed electric fields in excess of 100 MV/m on the insulator surface. The sample construction, experimental arrangement and experimental results are presented for the initial data in this work. Modeling of the multi-layer structure is discussed and methods of improving insulator surface dielectric strength in a vacuum are proposed. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Nunnally, WC (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 4 TC 1 Z9 3 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 301 EP 304 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000066 ER PT B AU Zhang, W Sandberg, J Weng, WT AF Zhang, W Sandberg, J Weng, WT BE Giesselmann, M Neuber, A TI Conceptual design study of horn power supply SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB A 250 kA pulsed power supply is required for the focusing horn of the proposed Brookhaven AGS Super Neutrino Beam Facility for long baseline neutrino oscillation experiment. It is expected to pulse at 2.5 Hz repetition rate. A preliminary study is being conducted to explore the key issues associated with the power supply system design. Advanced technologies used in similar systems as well as new ideas are being examined, simulated and evaluated. This power supply will be a very high stored energy, high average power, and high peak power system. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Zhang, W (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM arling@bnl.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 0-7803-7915-2 PY 2003 BP 335 EP 338 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000074 ER PT B AU Copperstock, D Aubuchon, M Kepil, K Nunnally, WC AF Copperstock, D Aubuchon, M Kepil, K Nunnally, WC BE Giesselmann, M Neuber, A TI Preliminary experiments with large optical absorption depth, high field, linear, photo-conductive switches SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB High electric field geometries for high power, photoconductive switches made possible by employing above bandgap photons and inter-bandgap dopants / defects are being investigated for compact pulse power systems. The high field, long absorption depth package reduces the required linear mode, optical closure energy and also reduces the conduction current density through the active material and at the contacts. In addition, the long absorption depth package increases the area available for thermal management and in concert with the reduced current density should increase the lifetime of the switch. This paper describes the design of the experimental test system, including high frequency current and voltage diagnostics, pulse charge system, and optical closure energy distribution system. The design and fabrication of the high-field package are presented. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Copperstock, D (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 3 TC 0 Z9 0 U1 0 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 357 EP 361 PG 5 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000079 ER PT B AU Leyh, GE AF Leyh, GE BE Giesselmann, M Neuber, A TI A critical analysis of IGBT geometries, with the intention of mitigating undesirable destruction caused by fault scenarios of an adverse nature SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Megawatt class Insulated Gate Bipolar Transistors [IGBTs] find many uses in industrial applications such as traction drives, induction heating and power factor correction. At present, these devices are not optimized for higher speed pulsed-power applications, such as kicker magnets or klystron modulators. This paper identifies fundamental issues that limit the dI/dt performance of standard commercial packages, and investigates several IGBT design optimizations that significantly improve high-speed performance at high peak power levels. The paper presents design concepts, results of electromagnetic simulations, and performance data of actual prototypes under high dI/dt conditions. C1 SLAC, Menlo Pk, CA 94304 USA. RP Leyh, GE (reprint author), SLAC, Menlo Pk, CA 94304 USA. NR 0 TC 5 Z9 5 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 366 EP 368 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000081 ER PT B AU McCuistian, BT Abeyta, O Aragon, P Caudill, L Ekdahl, C Eversole, S Dalmas, D Harrison, J Jacquez, E Johnson, J Kirbie, H Moir, D Montoya, N Nielsen, K Oro, D Reed, M Rodriguez, L Sanchez, M Schwaegel, J Simmons, D Studebaker, J Sullivan, G Swinney, C Temple, R Eylon, S Houck, T Sturges, R AF McCuistian, BT Abeyta, O Aragon, P Caudill, L Ekdahl, C Eversole, S Dalmas, D Harrison, J Jacquez, E Johnson, J Kirbie, H Moir, D Montoya, N Nielsen, K Oro, D Reed, M Rodriguez, L Sanchez, M Schwaegel, J Simmons, D Studebaker, J Sullivan, G Swinney, C Temple, R Eylon, S Houck, T Sturges, R BE Giesselmann, M Neuber, A TI DARHT-II commissioning status SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB The Dual Axis Radiographic Hydrotest Facility (DARHT) at Los Alamos National Laboratory produces flash radiographs of hydrodynamic experiments using two linear induction accelerators situated on orthogonal axes. The first axis accelerator is operational and has produced radiographs of hydrodynamic experiments. The second axis accelerator, which is in the commissioning stage, will generate an 18-MeV, 2-kA, 2-mus electron beam. These parameters are reduced during the initial phase of commissioning to greater than or equal to 12-MeV, greater than or equal to 1-kA, and greater than or equal to 350-ns. These reduced parameters allow lower voltages and fewer components than what will be necessary for the final machine. This paper presents experimental results of commissioning the second axis DARHT accelerator, including an overview of the pulsed power system plus electrical performance data from the 3-MV injector Marx generator and the 200-kV, 2-mus induction accelerator cells. Beam transport data will also be presented. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP McCuistian, BT (reprint author), Los Alamos Natl Lab, POB 1663,Mail Stop P-942, Los Alamos, NM 87545 USA. 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 BN 0-7803-7915-2 PY 2003 BP 391 EP 394 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000086 ER PT B AU Goforth, JH Oona, H Tasker, DG King, JC Herrera, DH Torres, DT Lopez, EA Atchison, WL Lindemuth, IR AF Goforth, JH Oona, H Tasker, DG King, JC Herrera, DH Torres, DT Lopez, EA Atchison, WL Lindemuth, IR BE Giesselmann, M Neuber, A TI Analysis of explosively formed fuse experiments SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Explosively formed fuse (EFF) opening switches have been used in a variety of applications to divert current in high explosive pulsed power (HEPP) experiments. Typically, EFF's operate at 0.1 - 0.2 MA/(cm switch width), and have an similar to2 mus risetime to a resistance of 10's -100's mOmega. We have demonstrated voltage standoff of similar to7KV/(die pattern) in some configurations, and typical switches have up to 100 die patterns. In these operating regimes, we can divert large currents (10-20 MA) to low impedance loads, and produce voltage waveforms with risetime and shape determined by the shape of the resistance curve and amount of magnetic flux in the circuit. Progress in quantitatively modeling EFF performance with magnetohydrodynamic (MHD) codes has been slow, and much of our understanding regarding the operating principles of EFF switches still comes from small-scale experiments coupled with hydrodynamic (hydro) calculations. These experiments are typically conducted at currents of similar to0.5 MA in a conductor 6.4 cm wide. A plane-wave detonation system is used to drive the EFF conductor into the forming die, and current and voltage are recorded. The resulting resistance profiles are compared to the hydro calculations to get insight into the operating mechanisms. Our original goals for EFF development were limited in scope, and in pursuing specific large systems, we have left behind a valuable body of small-scale test data that has been largely unused. We now have a charter to achieve a complete understanding of EFF devices, and our first step has been to review existing data. In this paper, we present some of the results of these investigations. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Goforth, JH (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. 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 0-7803-7915-2 PY 2003 BP 405 EP 408 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000089 ER PT B AU Rovang, D Cordova, S Hahn, K Maenchen, J Molina, I Portillo, S Sceiford, M Droemer, D Van De Valde, D Oliver, B Rose, D Welch, D Johnson, DL AF Rovang, D Cordova, S Hahn, K Maenchen, J Molina, I Portillo, S Sceiford, M Droemer, D Van De Valde, D Oliver, B Rose, D Welch, D Johnson, DL BE Giesselmann, M Neuber, A TI Recent progress in the development of immersed diodes SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc ID HYDROGEN TARGET AB Sandia National Laboratories is investigating and developing high-dose, high-brightness flash radiographic sources. One of the diodes we are developing is the immersed or B, diode. These diodes employ large-bore, high-field solenoid magnets to help produce an intense electron beam from a needle-like cathode "immersed" in the strong B, field of the magnet. Both simulation and experiments suggest that the capability of these diodes to achieve high dose from a small spot has been limited by deleterious effects associated with non-protonic anode plasmas evolving from the electron target or high-atomic-number (high-Z) converter. We are in the process of developing and testing the next generation of immersed diodes. The goals of these diodes are to improve our understanding of the evolution of the anode plasmas and avoid or delay the onset of non-ideal diode behavior by controlling the amount of non-protonic species accelerated off the anode. These diodes employ improved plasma diagnostics for studying the evolution of the anode plasmas and novel cryogenic concepts for forming solid hydrogenous anodes. Recent progress in the development, testing and understanding of immersed diodes at Sandia is described. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Rovang, D (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 23 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 487 EP 490 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000108 ER PT B AU Zutavern, FJ Armijo, JC Cameron, SM Denison, GJ Lehr, JM Luk, TS Mar, A O'Malley, MW Roose, LD Rudd, JV AF Zutavern, FJ Armijo, JC Cameron, SM Denison, GJ Lehr, JM Luk, TS Mar, A O'Malley, MW Roose, LD Rudd, JV BE Giesselmann, M Neuber, A TI Optically activated switches for low jitter pulsed power applications SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Optically activated high voltage switches are commonly used in pulsed power systems for reliable low jitter, multi-channel and multi-switch (low inductance) applications. In addition to low jitter switching, optical activation provides a high degree of electrical isolation between the triggering and switching power systems simplifying pulsed power design. The disadvantages of optical triggering for large-gap gas switches are the optical energy, line-of-sight optics, and system maintenance required to obtain reliable operation. This paper describes two technologies which can reduce or eliminate these disadvantages and provide more flexible optically activated switches for pulsed power systems. One approach is to reduce the optical trigger energy requirement for gas gap switches. Shorter optical pulses require less energy to initiate a plasma discharge. An experiment is being assembled to trigger a 50-100 kV gas gap switch with 120 fs wide optical pulses. Lower trigger energy has also been demonstrated by the introduction of metallic aerosols into a gas gap[l]. The apparatus will be added to this experiment to reproduce these results and determine the optical energy and power density requirements over a range of wavelengths and pulse widths. The status of this experiment will be discussed. A second approach uses solid state switching in two configurations: (1) as the main switch and (2) as a trigger. High-gain photoconductive semiconductor switches (PCSS) are practical for some direct pulsed power switching applications. We have demonstrated switching up to 220 kV and 8 kA. Higher power optically activated switching can be obtained by combining solid state and gas gap switching technologies. Multi-megavolt (MMV) switches can be triggered with fiber-optically triggered, remotely located PCSS. By placing the compact PCSS trigger extremely close to the trigger point, reliable, low-jitter, high power switching is achieved with low energy fiber-optic trigger systems that can easily be controlled and adjusted from a remote control center. Power for the trigger system can be derived from the electrical fields near the trigger, so all electrical cables to the trigger system are eliminated and replaced with 100 micron diameter fibers that trigger and monitor the operation of the system. Results from experiments with PCSS triggered gas gap switches and the design for a PCSS triggered multi-megavolt switch will be reported. PCSS switching properties including new picosecond pulse results and fabrication procedures for improved longevity will also be described. A 120 fs wide 780 nm laser pulse was used to radiate THz bandwidth pulses with a GaAs PCSS operating in the linear mode. New approaches for PCSS contact fabrication are being developed and tested to simplify the growth procedure, increase the current per filament capability, and improve device longevity. Progress continues to make PCSS a more useful component for pulsed power applications. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Zutavern, FJ (reprint author), Sandia Natl Labs, MS 1153,POB 5800, Albuquerque, NM 87185 USA. NR 6 TC 6 Z9 19 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 591 EP 594 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000131 ER PT B AU Woodworth, JR Johnson, DL AF Woodworth, JR Johnson, DL BE Giesselmann, M Neuber, A TI Laser-triggered water switching SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc ID BREAKDOWN; MODEL AB We are experimentally exploring the use of lasers as a method of command triggering high-voltage water switches, by focusing the laser light to a breakdown arc in pure water. We are using Nd-YAG laser radiation at 1064 nm and its harmonics at 532, 355, and 266 rim. We report a measured breakdown threshold of 1.4 x 10(10)W/CM2 at 532 rim, a power level that is easy to achieve with commercially-available lasers. The breakdown threshold is an order of magnitude higher for 1064 run or 355 rim light. Scattering of the laser beam by laser-induced index of refraction gradients is noticeable at 532 nm and becomes an increasing problem at shorter wavelengths, preventing us from breaking down water at all at 266 nm. We produced breakdown arcs more than 4-cm in length by focusing 75 mJ of 532 nm laser energy in water with a 29-cm-focal-length lens. In addition to the breakdown arcs, we note that focusing 532-nm light into pure water vibrationally excites the water, causing the generation of coherent beams of red Raman-shifted radiation. The vibrationally-excited columns of water are readily visible as they emit red light in all directions. Some of the vibrationally-excited water columns we observed were over 30 cm long. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Woodworth, JR (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 11 TC 3 Z9 3 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 595 EP 598 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000132 ER PT B AU Lehr, JM Maenchen, JE Woodworth, JR Johnson, WA Coates, RS Warne, LK Mix, LP Johnson, DL Smith, ID Corley, J Drennan, SA Hodge, KC Guthrie, DW Navarro, MJ Sarkisov, GS AF Lehr, JM Maenchen, JE Woodworth, JR Johnson, WA Coates, RS Warne, LK Mix, LP Johnson, DL Smith, ID Corley, J Drennan, SA Hodge, KC Guthrie, DW Navarro, MJ Sarkisov, GS BE Giesselmann, M Neuber, A TI Multi-megavolt water breakdown experiments SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB In the quest to develop current generators for high energy density physics experiments, Sandia National Laboratories has long used water as an insulating media. Its high electrical breakdown strength and high dielectric constant corresponds to relatively compact energy storage components as well as low inductance spark gap switches. With the refurbishment of the Z machine underway, and with an eye towards the next generation of high current accelerators, an extensive research effort into water switches has been undertaken. A facility, called Z-20, has been built(1) to within ZR operational levels to test the geometry transition and a variety of configurations of water switches. Particular parameters of interest are polarity and field enhancement dependence, prepulse level, gap spacing and threshold voltage levels. C1 Sandia Natl Labs, Albuquerque, NM USA. RP Lehr, JM (reprint author), Sandia Natl Labs, POB 5800,1193, Albuquerque, NM USA. NR 3 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 609 EP 614 PG 6 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000135 ER PT B AU Rosenthal, SE Pointon, TD Elizondo, JM Johnson, WA Lehr, JM Maenchen, JE Struve, KW McDaniel, DH Corley, JP Johnson, DL AF Rosenthal, SE Pointon, TD Elizondo, JM Johnson, WA Lehr, JM Maenchen, JE Struve, KW McDaniel, DH Corley, JP Johnson, DL BE Giesselmann, M Neuber, A TI Investigating the electromagnetic structure of the coax-to-triplate transition for the pulse-compression section of the ZR accelerator SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB The ZR accelerator is a Refurbishment of Sandia's (Z) under bar accelerator, allowing for a 50-60% increase in peak current delivered to a Z-pinch load. Contributing to its design, a new water-switch pulse-compression section is being tested experimentally on the Z20 test facility (part of Sandia's National Pulsed Power Development Laboratory), and modeled with accurate-geometry 3-D electromagnetic simulation (QUICKSILVER code), and circuit modeling. Based on information acquired from new optical diagnostics[l], more detailed water switching models have been incorporated into the simulations. The simulations can show how energy is launched into higher-order modes under certain nonideal conditions such as water switch jitter, and also how the jitter itself can occur owing to slight differences in the water switch initiation process. The electromagnetic simulations indicate the departure from pure TEM mode structure[2], particularly when the frequency content of the pulse is high with fast water switching. The first results from the new switch model are presented. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Rosenthal, SE (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. 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 BN 0-7803-7915-2 PY 2003 BP 626 EP 629 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000139 ER PT B AU Johnson, WA Coats, RS Jorgenson, RE Kotulski, JD Lehr, JM Pasik, MF Rosenthal, SE Turner, CD Warne, LK AF Johnson, WA Coats, RS Jorgenson, RE Kotulski, JD Lehr, JM Pasik, MF Rosenthal, SE Turner, CD Warne, LK BE Giesselmann, M Neuber, A TI Electromagnetic analysis and modeling of the coax-totriplate transition for the pulse-compression section of the ZR accelerator SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Transverse electromagnetic (TEM) wave analysis is used to estimate the efficiencies of the coax to triplate transition in Sandia's Z-20 test module. The structure of both the TEM mode and higher order TE modes in the triplate transmission line are characterized. In addition, three dimensional time domain simulations are carried out and used in conjunction with the modal analysis to provide insight into the wave structure excited in the triplate transmission line. C1 Sandia Natl Labs, Albuquerque, NM USA. RP Johnson, WA (reprint author), Sandia Natl Labs, POB 5800,Mail Stop 1152, Albuquerque, NM USA. 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 0-7803-7915-2 PY 2003 BP 630 EP 633 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000140 ER PT B AU Nielsen, K McCuistian, B Fockler, J Yu, S Carboni, V Corcoran, P Douglas, J Eichenberger, C Harris, G Lackner, H Morton, D Nishimoto, H AF Nielsen, K McCuistian, B Fockler, J Yu, S Carboni, V Corcoran, P Douglas, J Eichenberger, C Harris, G Lackner, H Morton, D Nishimoto, H BE Giesselmann, M Neuber, A TI Design and performance of the Marx generator for the DARHT second axis electron injector SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB The injector for the second axis of the Dual-Axis Radiographic Hydrotest Facility (DARHT II) is now undergoing commissioning tests at Los Alamos National Laboratory. A Marx generator develops a 3.2 MV, 2 mus pulse that is applied to the diode through a high voltage (or Marx) dome, current stalk and high voltage insulator column. The 2 kA electron beam source is a 165-mm-diameter thermionic dispenser cathode operating near 120 kV/cm. The extracted beam enters a series of eight pulsed power-driven injector induction cells that accelerate the beam to approximately 4.5 MeV. The beam then passes through a beamhead clean-up zone (BCUZ) to "scrape off" the off-energy portion of the beam (the beam leading edge and, to a lesser extent, the beam trailing edge). A crowbar switch fired at the end of 2 mus produces a short fall time. This paper focuses on the electrical and mechanical design and testing of the Marx generator. The Marx consists of 88 stages, each half stage of which is a +/- 50 kV type E PFN. The Marx was tested for over 8000 shots before shipment to Los Alamos and demonstrated 6 ns jitter and good reliability with only 8 prefires out of 5000 shots. At the end of December 2002, nearly 800 shots have been fired in the process of commissioning the DARHT machine. The results of both series of these tests are given in this paper. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Nielsen, K (reprint author), Los Alamos Natl Lab, POB 1663,Mail Stop P-939, Los Alamos, NM 87545 USA. NR 3 TC 2 Z9 2 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 634 EP 637 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000141 ER PT B AU Reass, WA Apgar, SE Baca, DM Doss, JD Gonzales, JM Gribble, RF Trujillo, PG AF Reass, WA Apgar, SE Baca, DM Doss, JD Gonzales, JM Gribble, RF Trujillo, PG BE Giesselmann, M Neuber, A TI High power operation of the polyphase resonant converter modulator system for the spallation neutron source linear accelerator SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB The Spallation Neutron Source (SNS) is a new 1.4 MW average power beam, 1 GeV accelerator being built at Oak Ridge National Laboratory. The accelerator requires 15 "long-pulse" converter-modulator stations each providing a maximum of I I MW pulses with a 1.1 MW average power. Two variants of the converter-modulator are utilized, an 80 kV and a 140 kV design, the voltage dependant on the type of klystron load. The converter-modulator can be described as a resonant zero-voltage-switching polyphase boost inverter. As noted in Figure 1, each convener modulator derives its buss voltage from a standard 13.8 kV to 2100 Y (1.5 MVA) substation cast-core transfonner. The substation also contains harmonic traps and filters to accommodate IEEE 519 and 141 regulations. Each substation is followed by an SCR pre-regulator to accommodate system voltage changes from no load to full load, in addition to providing a soft-start function. Energy storage and filtering is provided by special low inductance self-clearing metallized hazy polypropylene traction capacitors. Three "H-Bridge" Insulated Gate Bipolar Transistor (IGBT) switching networks are used to generate the polyphase 20 kHz transformer primary drive waveforms. The 20 kHz drive waveforrns are chirped the appropriate duration to generate the desired klystron pulse width. PWM (pulse width modulation) of the individual 20 kHz pulses is utilized to provide regulated output waveforms with DSP (digital signal processor) based adaptive feedforward and feedback techniques. The boost transformer design utilizes amorphous nanocrystalline material that provides the required low core loss at design flux levels and switching frequencies. By resonating the transformer secondary leakage inductance, voltage multiplication and IGBT zero-voltage-switching can be attained. The transformers are wound for leakage inductance, not turns ratio, and a 1:18 turns ratio results in a 1:60 output. The resonant topology has the added benefit of being deQed in a klystron fault (shorted output) condition, with little energy transfer during an arc-down situation. This obviates the need of crowbars and other related protective networks. A review of these design parameters, operational performance at design power levels, and production status will be presented. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Reass, WA (reprint author), Los Alamos Natl Lab, POB 1663,Mail Stop H-827, Los Alamos, NM 87545 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 0-7803-7915-2 PY 2003 BP 645 EP 648 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000143 ER PT B AU Zhang, W Sandberg, J Lambiase, R Lee, YY Lockey, R Mi, J Nehring, T Pai, C Tsoupas, N Tuozzolo, J Warburton, D Wei, J Rust, K Cutler, R AF Zhang, W Sandberg, J Lambiase, R Lee, YY Lockey, R Mi, J Nehring, T Pai, C Tsoupas, N Tuozzolo, J Warburton, D Wei, J Rust, K Cutler, R BE Giesselmann, M Neuber, A TI SNS extraction fast kicker system development SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB The SNS Extraction Fast Kicker System is a very high power, high repetition rate pulsed power system. It was design and developed at Brookhaven National Laboratory. This system will consist of fourteen identical high voltage, high current modulators, and their auxiliary control and charging systems. The modulators will drive fourteen extraction magnet sections located inside of the SNS accumulator ring. The required kicker field rise time is 200ns, a pulse flattop of 700 ns, a pulse repetition rate of 60 pulse-per-second. A 2500 Ampere per modulator output is required to reach the extraction kicker magnetic field strength. This design features a Blumlein Pulse-Forming-Network based topology, a low beam impedance termination, a fast current switching thyratron, and low inductance capacitor banks. It has a maximum charging voltage of 50kV, an open circuit output of 100kV, and a designed maximum pulsed current output of 4kA per modulator. The overall system output will be multiple GVA with 60 Pulse-per-second repetition rate. A prototype modulator has been successfully built and tested well above the SNS requirement. The modulator system production is in progress. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Zhang, W (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. RI Lambiase, Robert/E-1934-2013 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 0-7803-7915-2 PY 2003 BP 653 EP 656 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000145 ER PT B AU Faehl, RJ Atchison, WL Lindemuth, IR AF Faehl, RJ Atchison, WL Lindemuth, IR BE Giesselmann, M Neuber, A TI Mhd simulations of MTF implosions with tabular eos and conductivities SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Magnetized Target Fusion (MTF) is a pulsed approach that compresses magnetized fuel to achieving burning hydrogen plasma conditions. The compression in one MTF-scenario comes from uses a conducting liner that is imploded due to the action of high electrical currents that flow on the outer surface of the liner. This implosion compresses and heats a dense, warm magnetized deuterium or deuterium-tritium plasma. In the present work, MHD numerical simulations of a representative MTF configuration are used to study the effect of radiative losses on the compressional heating rate and the stability of the liner/plasma system late in time. SESAME equations of state and conductivity tables are used for all materials. C1 Los Alamos Natl Lab, Plasma Phys Grp, Los Alamos, NM 87545 USA. RP Faehl, RJ (reprint author), Los Alamos Natl Lab, Plasma Phys Grp, POB 1663, Los Alamos, NM 87545 USA. 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 0-7803-7915-2 PY 2003 BP 685 EP 688 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000152 ER PT B AU Sanford, TWL Mock, RC Gilliland, TL Seamen, JF Leeper, RJ Watt, RG Chrien, RE Idzorek, GC Peterson, DL Duselis, PU AF Sanford, TWL Mock, RC Gilliland, TL Seamen, JF Leeper, RJ Watt, RG Chrien, RE Idzorek, GC Peterson, DL Duselis, PU BE Giesselmann, M Neuber, A TI Wire-array holder critical in high wire-number Z-pinch implosions SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc ID X-RAY SOURCE; POWER; DYNAMICS AB The quality of high wire-number z-pinch implosions on Z using a dynamic-hohlraum configuration is significantly affected by the method of holding the wires. The two arrangements discussed here have led to differences of a factor of 1.6+/-0.2 in radial x-ray power, where the higher power is produced by the holder with the superior current contact at the cathode. In support of this observation, single exploding wire data taken on a 250-ns pulser indicate that improved wire-electrode contact at the cathode permits greater energy delivery to the wire prior to current shunting to surrounding wire-plasma corona. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Sanford, TWL (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 16 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 733 EP 736 DI 10.1109/PPC.2003.1277916 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000163 ER PT B AU Rose, E Carlson, R Smith, J AF Rose, E Carlson, R Smith, J BE Giesselmann, M Neuber, A TI Radiographic performance of Cygnus 1 and the Febetron 705 SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Spot sizes are measured for medium energy x-ray generators. The Cygnus x-ray source [1] is developed for support of the Sub-Critical Experiments Program at the Nevada Test Site. Cygnus uses proven pulsed power technology to drive a rod pinch diode at 2.25 megavolts. Four rads at one meter is achieved in a 50-ns FWHM pulse and the radiographic spot size is as small as 1 mm-diameter. Radiographic spot size is measured employing roll bars and resolution targets. Images are recorded on film and storage phosphor, digitized, and analyzed. The Febetron 705 x-ray source operates at 2.3 megavolts and is rated at 500 millirads at one meter. A demountable diode tube provides the ability to replace the standard diode with custom hardware. Spot sizes for standard hardware are measured. New diode designs are investigated in an effort to generate smaller radiographic spot sizes to produce improved radiographic images. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Rose, E (reprint author), Los Alamos Natl Lab, POB 1663,Mail Stop P-947, Los Alamos, NM 87545 USA. 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 BN 0-7803-7915-2 PY 2003 BP 756 EP 759 DI 10.1109/PPC.2003.1277922 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000169 ER PT B AU Anderson, RA Clancy, TJ Fulkerson, S Petersen, D Pendelton, D Hulsey, S Ullery, G Tuck, J Polk, M Kamm, R Newton, M Moore, WB Arnold, P Ollis, C Hinz, A Robb, C Fornes, J Watson, J AF Anderson, RA Clancy, TJ Fulkerson, S Petersen, D Pendelton, D Hulsey, S Ullery, G Tuck, J Polk, M Kamm, R Newton, M Moore, WB Arnold, P Ollis, C Hinz, A Robb, C Fornes, J Watson, J BE Giesselmann, M Neuber, A TI Measurements of the radiated fields and conducted current leakage from the pulsed power systems in the national ignition facility at LLNL SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB An important pulsed power system consideration is that they inherently generate fields and currents that can cause interference in other subsystems and diagnostics. Good pulsed power design, grounding and isolation practices can help mitigate these unwanted signals. During the laser commissioning shots for the NIF Early Light milestone at LLNL, measurements were made of the radiated field and conducted currents caused by the Power Conditioning System (PCS) modules with flash lamp load and the Plasma Electrode Pockels Cell (PEPC) driver. The measurements were made in the capacitor bay, laser bay, control room and target bay. The field measurements were made with B-dot and E-dot probes with bandwidth of about 100MHz. The current measurements were made with a clamp on probe with a bandwidth of about 20 MHz. The results of these measurements show fields and currents in the NIF Facility well below that required for interference with other subsystems. Currents on the target chamber from the pulsed power systems are well below the background noise currents. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Anderson, RA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 3 TC 3 Z9 3 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 793 EP 796 DI 10.1109/PPC.2003.1277930 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000177 ER PT B AU Sebring, R Anderson, W Bartos, J Edwards, J Garcia, F Greigo, J Randolph, B Salazar, M Prime, M AF Sebring, R Anderson, W Bartos, J Edwards, J Garcia, F Greigo, J Randolph, B Salazar, M Prime, M BE Giesselmann, M Neuber, A TI New residual stress mapping tool applied to Atlas current joint design SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc ID CONTOUR AB A redesigned cylindrical liner system has been implemented for use on the Atlas capacitor bank. This new design dramatically changes how the liner, glide planes and current joints of the system are formed. The previous design relied on interference of the liner with the glide plane by thermal shrink fit using liquid nitrogen coolant to form current joints. The new design achieves the required fit by mechanically distorting soft metals with a swaged joint. In this paper, we present the results of the first application of a new residual stress mapping technique, the contour method, to the design and fabrication process of the Atlas upper current joint. One of the strengths of the contour method is that it provides a full cross-sectional map of the residual-stress component normal to the cross section. The results showed significant stresses in the stainless steel glide plane with expected maximum compression near the joint and stresses in the aluminum part liner and return current conductor that corresponds well with measured form distortions. C1 Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA. RP Sebring, R (reprint author), Los Alamos Natl Lab, Mat Sci & Technol Div, Los Alamos, NM 87545 USA. OI Prime, Michael/0000-0002-4098-5620 NR 12 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 805 EP 808 DI 10.1109/PPC.2003.1277932 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000179 ER PT B AU Atchison, WL Faehl, RJ Lindemuth, IR Lemons, DS AF Atchison, WL Faehl, RJ Lindemuth, IR Lemons, DS BE Giesselmann, M Neuber, A TI Examination of liner stability during magnetic implosion using experiments and simulations SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Los Alamos has been conducting a number experiments to examine dynamic properties of materials using high-energy pulse power generator systems. These experiments are conducted in a Z-pinch configuration typically with an outer aluminum liner to carry the current, develop the acting force, and act as the driving element. The peak magnetic fields produced by these systems have ranged from 0.5 to 1.7 mega gauss. The onset of what has been called Magneto-Raleigh-Taylor (MRT) instabilities in the outer aluminum liner, when excessive current is applied, has been considered a limitation on the design of these liners. However, in several cases where the material of the liner was calculated to be completely melted the outside liner surface remained stable. Analysis of the data from this and several other experiments and comparison to ID MHD simulations has already permitted us to examine how the drive conditions on this aluminum layer appear to effect the likelihood of onset of these instabilities. Additionally, careful variations of drive conditions, initial liner surface conditions, and EOS properties (including conductivity) suggest two phenomenons that appear to cause onset of instability. First, while the nature of the instability may still be fundamentally driven by the acceleration of a fluid interface, the effect may be drastically accentuated by the onset of liquid to vapor phase change if the material is allowed to approach too closely to the saturated liquid line. Furthermore, several observed cases which remained stable even after melting suggest that there may be drive conditions which maintain the aluminum at densities and temperatures above the saturated liquid line and significantly delay the onset of MRT instabilities. Second, the gradient of distribution of forces within the melted liner may also impact the growth of instabilities. We will also present the results of 2D simulations of these conditions and examine in greater detail the apparent mechanisms by which these instabilities grow. C1 Los Alamos Natl Lab, Plasma Phys Grp, Los Alamos, NM 87545 USA. RP Atchison, WL (reprint author), Los Alamos Natl Lab, Plasma Phys Grp, POB 1663, Los Alamos, NM 87545 USA. NR 4 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 809 EP 812 DI 10.1109/PPC.2003.1277933 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000180 ER PT B AU Nguyen, MN AF Nguyen, MN BE Giesselmann, M Neuber, A TI Short circuit protection of high speed, high power IGBT modules SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB At SLAC, research and development for the Next Linear Collider (NLC) is progressing. The 8-Pack project is a test stand in which key NLC components will be developed. Presently the setup is such that an Induction Modulator [1] will generate 400kV, 1200A, and 1.6mus flattop pulse to drive four XL4 X-band klystrons. This requires the use of 76 high power IGBT modules operating in parallel at 3600A and up to 2200V each. IGBT switching speeds and short circuit protection from klystron arcs are major concerns. This paper describes a gate drive circuit with a new method to protect IGBT modules under short circuit conditions. Using a dI/dt control technique, the gate drive circuit enabled the Mitsubishi module CM600HB-90H to switch 4000A at speeds up to 10kA/mus in normal operation, while holding the short circuit peak-current to about 8000A. Results from the single IGBT test and the 8-Pack Modulator prototype will be presented. C1 Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Nguyen, MN (reprint author), Stanford Linear Accelerator Ctr, POB 20450,M-S 49, Stanford, CA 94309 USA. NR 5 TC 1 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 815 EP 818 DI 10.1109/PPC.2003.1277934 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000181 ER PT B AU Hahn, K Maenchen, J Cordova, S Molina, I Portillo, S Rovang, D Rose, D Oliver, B Welch, D Bailey, V Johnson, DL Schamiloglu, E AF Hahn, K Maenchen, J Cordova, S Molina, I Portillo, S Rovang, D Rose, D Oliver, B Welch, D Bailey, V Johnson, DL Schamiloglu, E BE Giesselmann, M Neuber, A TI Retrapping studies on RITS SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Sandia National Laboratories (SNL) is developing intense sources for flash x-ray radiography. In collaboration with Mission Research Corporation, the Atomics Weapons Establishment, and Titan Pulsed Sciences Division, SNL has studied power flow into various electron beam diodes on the Radiographic Integrated Test Stand (RITS).(1) Historically, high-impedance accelerators have driven radiographic loads with little excess power flow. However, a number of facilities now under design will use lower impedance inductive voltage adder technology to drive these diodes, requiring control of the vacuum electron sheath flow. The diode configuration in this study uses a non-emitting field shaper or "knob" to redirect this excess electron flow away from the diode region. Recent experiments at SNL have demonstrated retrapping of sheath current along a magnetically insulated transmission line into a blade load. The goals of the experiments presented here were to assess power flow issues and to help benchmark the LSP particle-in-cell code used to design the experiment. Comparisons between LSP simulations and experimental data are presented. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Hahn, K (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 10 TC 5 Z9 5 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 871 EP 874 DI 10.1109/PPC.2003.1277948 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000195 ER PT B AU Portillo, S Hahn, K Maenchen, J Molina, I Cordova, S Johnson, DL Rose, D Oliver, B Welch, D AF Portillo, S Hahn, K Maenchen, J Molina, I Cordova, S Johnson, DL Rose, D Oliver, B Welch, D BE Giesselmann, M Neuber, A TI Initial experimental results of re-trapping studies on a large area diode on RITS-3 SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB As part of a continuous research effort into advanced flash radiographic sources using intense electron beams, Sandia National Laboratories (SNL) has been investigating coupling vacuum power flow into various high power diodes. Of key importance is the issue of the re-trapping of electrons from the sheath current of a magnetically insulated vacuum transmission line (MITL) into the diode load. Results of electron re-trapping studies on a large area diode (LAD) on the RITS-3 accelerator are presented here. RITS-3 is a 4.5 MV, 160 kA inductive voltage adder pulsed power accelerator. Results show that re-trapping of the sheath current does occur and compares favorably with particle in cell (PIC) predictions of the LSP modeling code. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Portillo, S (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM sportil@sandia.gov NR 5 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 879 EP 882 DI 10.1109/PPC.2003.1277950 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000197 ER PT B AU Elizondo, JM Martin, TH Struve, KW Bennett, LF AF Elizondo, JM Martin, TH Struve, KW Bennett, LF BE Giesselmann, M Neuber, A TI The Z-20 reliability calculations SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB The Z-20 is a pulsed power facility designed to test the characteristics of water switches to be used in the ZR project. The facility consists of a Marx generator feeding into a water dielectric Intermediate Store (IS), the IS discharges through a gas switch into a water dielectric Pulsed Forming Line (PFL), goes through the water switches into a water dielectric flat tri-plate transmission line (t-line) matched to a resistive load. The facility was also used to determine the effects of an abrupt, coaxial to flat plate, T-line transition in the water switch region, and the use of large flat dielectric plates to separate anode and cathode from the coaxial PFL. An extended technique to calculate the probability of failure, of large surface area water systems, was used to estimate the reliability of the Z-20 system. With this technique we integrated the probability of failure, after partitioning the surface in small steps, with the advantage that the "enhanced' regions get automatically included in the calculation. The system has been operating at voltage levels above 4MV with more than 400 shots accumulated without a single failure in the water region. C1 Sandia Natl Labs, Livermore, CA 94550 USA. RP Elizondo, JM (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA. NR 6 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 895 EP 898 DI 10.1109/PPC.2003.1277954 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000201 ER PT B AU Puetz, E Motina, I Portillo, S Cordova, S Johnson, DL Corcoran, P AF Puetz, E Motina, I Portillo, S Cordova, S Johnson, DL Corcoran, P BE Giesselmann, M Neuber, A TI RITS-3 self-break water switch studies SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB The Radiographic Integrated Test Stand (RITS-3) is a 4-MV, 160-kA, 70-ns Inductive Voltage Adder accelerator at Sandia National Laboratories designed to develop critical understanding of flash radiographic drivers and x-ray sources. It utilizes three pulse forming lines (PFLs) to drive three inductive voltage adder cavities. Each PFL is switched by a fast-pulse-charged, self-breaking, annular water switch. Good synchronization and low loss in the switches is essential to efficient operation of the accelerator. Data from RITS-3 is analyzed with respect to jitter and losses, and compared to computer electric field codes for accuracy. In an attempt to achieve better synchronization, each of the three switch gap sizes was adjusted and electrode geometries were changed to improve performance. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Puetz, E (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 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 BN 0-7803-7915-2 PY 2003 BP 899 EP 901 DI 10.1109/PPC.2003.1277955 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000202 ER PT B AU Ong, M DeHope, B Griffin, K Goerz, D Kihara, R Vogtlin, G Zentler, JM Scarpetti, R AF Ong, M DeHope, B Griffin, K Goerz, D Kihara, R Vogtlin, G Zentler, JM Scarpetti, R BE Giesselmann, M Neuber, A TI Test stand for linear induction accelerator optimization SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Lawrence Livermore National Laboratory has designed and constructed a test stand to improve the voltage regulation in our Flash X-Ray (FXR) accelerator cell. The goal is to create a more mono-energetic electron beam that will create an x-ray source with a smaller spot size. Studying the interaction of the beam and pulse-power system with the accelerator cell will improve the design of high-current accelerators at Livermore and elsewhere. On the test stand, a standard FXR cell is driven by a flexible pulse-power system and the beam current is simulated with a switched center conductor. The test stand is fully instrumented with high-speed digitizers to document the effect of impedance mis-matches when the cell is operated under various full-voltage conditions. A time-domain reflectometry technique was also developed to characterize the beam and cell interactions by measuring the impedance of the accelerator and pulse-power component. Computer models are being developed in parallel with the testing program to validate the measurements and evaluate different design changes. Both 3D transient electromagnetic and circuit models are being used. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Ong, M (reprint author), Lawrence Livermore Natl Lab, POB 808,L-153, Livermore, CA 94550 USA. 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 BN 0-7803-7915-2 PY 2003 BP 909 EP 912 DI 10.1109/PPC.2003.1277958 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000205 ER PT B AU Harjes, C Elizondo, J Struve, K Bennett, L Johnson, D AF Harjes, C Elizondo, J Struve, K Bennett, L Johnson, D BE Giesselmann, M Neuber, A TI Circuit modeling for ZR SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB In the Z Refurbishment (ZR) project, the capabilities of the Z accelerator will be expanded [1]. Most of the pulsed power hardware is being redesigned for operation with higher reliability, a greater shot rate, and increased pulse energy. The topology of the ZR pulsed power circuit will be similar to that of Z with a few significant changes. The initial baseline circuit design for ZR was developed using Screamer [2] which has been the primary pulsed power circuit design tool employed at SNL for years. Screamer is, however, limited in the topologies it can simulate. For ZR there are several circuit features which cannot be modeled adequately in Screamer. The most significant of these is the need to allow for a high degree of independence in module firing times so that a prescribed temporally shaped pulse can be generated for isentropic compression experiments (ICE) [3]. For this reason, the baseline circuit design for ZR is now being developed using Bertha [4]. Bertha is a NRL developed T-line circuit simulation code that is not topology limited and runs fast. In this paper, a discussion of the circuit modeling strategy for the ZR project along with a discussion of the current status of the ZR baseline circuit model will be presented. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Harjes, C (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 7 TC 2 Z9 4 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 917 EP 920 DI 10.1109/PPC.2003.1277960 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000207 ER PT B AU Wakeland, P Kincy, M Garde, J AF Wakeland, P Kincy, M Garde, J BE Giesselmann, M Neuber, A TI Hydrodynamic loading of structural components due to electrical discharge in fluids SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Electrical discharge in a fluid produces a transient pressure wave, which should be taken into account when designing structural components of pulsed power machines. By combining theoretical approaches for underwater explosive theory with a self-consistent approach for modeling water as a compressible non-flow material, finite element models can be used to investigate mechanical response to arc driven pressure waves. Water switch testing included impulse measurements of both multiple and single arc gaps to compare with theory. Pressure wave interactions seen in computer models were in good agreement with peak pressures measured from a three-electrode water switch. Pressure measurements from a single electrode water switch were in close approximation to predictions based on explosive theory. Structural damage tests were also conducted in which damage to machine parts were related to arc energies. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Wakeland, P (reprint author), Sandia Natl Labs, POB 5800,MS 1178, Albuquerque, NM 87185 USA. NR 0 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 925 EP 928 DI 10.1109/PPC.2003.1277962 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000209 ER PT B AU Johnson, DJ Ives, HC Savage, ME Stygar, WA AF Johnson, DJ Ives, HC Savage, ME Stygar, WA BE Giesselmann, M Neuber, A TI High-voltage hold-off of large surface area metal electrodes with dielectric surface layers SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Aluminum and stainless steel electrodes with dielectric surface layers have been tested for the avoidance of electron emission and plasma induced arcs that limit high voltage hold-off. The aluminum dielectric coating, is a 50-mum-thick hard-anodized surface layer. Tests of the layer were made with and without a chemical etch to improve bonding to the machined aluminum. The coating on stainless steel is a 1-mum-thick chromium oxide surface layer formed during high humidity hydrogen firing. Tests were performed on 15 and 17-cm-diameter electrodes, with 1.8 to 6 mm gaps. Tests were made with a 150 to 500 kV, 160-ns-FWHM waveform, with 1-cos(omegat) shape. The electrodes were cleaned with acetone and installed into the vacuum chamber in a filtered clean air environment with <100 particles/m(3). Tests were performed with < 3x10(-6) Torr vacuum. Data were obtained for vir-in surfaces and as a function of accumulated damage from breakdown arcs. The anodized coatings gave maximum high voltage hold-off of 1.4 MV/cm when new and showed little degradation with 150-mum-diameter damage craters in the cathode. Craters larger than 1-mm-diameter sometimes caused a factor of two degradation in hold off. It was less necessary to electrically condition the anodized surfaces to get optimum results. Results from each of the dielectric surface coatings and uncoated machined surfaces will be discussed. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Sandia Natl Labs, POB 5800,Mail Stop 1182, Albuquerque, NM 87185 USA. EM djjohns@sandia.gov NR 5 TC 1 Z9 1 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 1021 EP 1024 DI 10.1109/PPC.2003.1277985 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000232 ER PT B AU Waganaar, WJ Cochrane, JC Hosack, KW Intrator, T Sanchez, P Taccetti, JM AF Waganaar, WJ Cochrane, JC Hosack, KW Intrator, T Sanchez, P Taccetti, JM BE Giesselmann, M Neuber, A TI Design and performance of the pre-fire detection system for the FRX-L main capacitor SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB The Main Capacitor Bank of the FRX-L (Field-Reversed Configuration eXperiment) supplies current (1.6 Meg amp) to a single-turn coil that is used to create high-density plasmas for magnetized-target fusion (MTF) experiments. The energy stored in the main bank (200 kJ) is transferred to the load coil via an array of four Maxwell rail-gap switches in parallel. Each switch is capable of transferring approximately a quarter of the main bank charge flow without damage. Therefore, if a single switch pre-fires it is subject to much greater stress than it is able to tolerate. In this paper, we discuss the design and performance of a system that is able to discriminate between a switch pre-fire, trigger noise, and normal operation and initiate a trigger in time to safely prevent damage. This system consists of innovative electric field detectors, fiber-optic isolation of signals and high-speed solid-state circuitry that interfaces with the Maxwell trigger system without modification. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Waganaar, WJ (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. 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 BN 0-7803-7915-2 PY 2003 BP 1183 EP 1185 DI 10.1109/PPC.2003.1278023 PG 3 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000270 ER PT B AU Smith, DL Wilson, JM Slattery, MJ Tabor, DA Donovan, GL AF Smith, DL Wilson, JM Slattery, MJ Tabor, DA Donovan, GL BE Giesselmann, M Neuber, A TI Two ZR Marx generator operating configurations that make possible their rolling upgrade integration into Z SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB If the Sandia National Laboratories' Z-Machine Marx generators and the Z-Refurbishment (ZR) Marx generators are mixed to drive like-modules in parallel, the ZR banks need to be temporarily reconfigured to closely match the output waveforms of the Z banks. Otherwise, there would be significant module-to-module variations and a loss of consistency at the central target region. Sandia has explored two solutions for operating the ZR Marx generators to meet this requirement. One method involves charging the ZR banks to about 72 kV along with the 90-kV charge for the Z banks, thus requiring two power supplies and charge busses plus a different SF6 pressure in the Marx switches. The other method is to short or bypass an appropriate number of ZR Marx stages so the remaining "reduced" Marx generator may be charged to the same 90-kV level. Some hardware, labor, and bank inductance tuning are needed to match output timing to the original pulsed power. This paper examines how to implement both solutions and compares their advantages and disadvantages with the goal of choosing only one of them. Models supporting this effort take into account measurements obtained from existing Marx generators that have been reconfigured in similar ways. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Smith, DL (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 BN 0-7803-7915-2 PY 2003 BP 1201 EP 1204 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000275 ER PT B AU Smith, DL Savage, ME Maenchen, JE McDaniel, DH Slattery, MJ Weinbrecht, EA Kitterman, DL Starbird, RL AF Smith, DL Savage, ME Maenchen, JE McDaniel, DH Slattery, MJ Weinbrecht, EA Kitterman, DL Starbird, RL BE Giesselmann, M Neuber, A TI ZR Marx capacitor vendor evaluation results and procurement strategy SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB To meet or exceed the 26-MA goal for ZR, the refurbished upgrade to the Z machine at Sandia National Labs, the existing Marx generator capacitors must be replaced with identical size units but with twice the capacitance. Before the six-month shut down and transition from Z to ZR occurs in late 2005, most of the 2500 capacitors must be delivered for acceptance testing and installation. We chose to undertake an ambitious vendor qualification program to reduce the risk of not meeting ZR performance goals, to encourage the pulsed-power industry to revisit the design and development of high energy discharge capacitors, and to meet the cost and delivery schedule within the ZR project plans. Five manufacturers were willing to fabricate and sell Sandia samples of six capacitors each to be evaluated. In addition, four more samples of modified or alternate designs were submitted for testing at the vendors' expense, giving us a total of 45 capacitors to test. The 8,000-shot qualification test phase of the effort is now complete. This paper summarizes how the 0.279x0.356x0.635-m Scyllac-style 2.6-muF, <30-nH, 100-kV, 35%-reversal capacitor lifetime specifications were determined, briefly describes the nominal 260-kJ test facility configuration, presents the test results of the most successful candidates, and provides procurement strategy and acceptance testing protocols that balance available resources against performance, cost, and schedule risk. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Smith, DL (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 1 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 1205 EP 1208 DI 10.1109/PPC.2003.1278029 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000276 ER PT B AU Savage, ME Starbird, R Ziska, G Sharpe, R AF Savage, ME Starbird, R Ziska, G Sharpe, R BE Giesselmann, M Neuber, A TI Automatic test system for lifetime testing of 100 kilovolt scyllac-style energy storage capacitors SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Optimizing the design of the upgrade to the Z pulser at Sandia National Laboratories renewed interest in the ubiquitous Scyllac-cased capacitor. For the Z upgrade, the desired capacitance value in each case is different than those built before, and double that of the existing units in Z. The cost and fundamental importance of the Marx capacitors in pulsers like Z prompted the decision to build a test facility that could evaluate sample units from capacitor manufacturers. The number of interested vendors and the expected lifetime indicated about 350 thousand capacitor-shots for the capacitors in a plus-minus configuration. The project schedule demanded that the initial testing be completed in a few months. These factors, and budget limitations, pointed to the need for a system that could test multiple pairs of capacitors at once, without a full-time attendant. The system described here tests up to ten pairs of 2.6 muF capacitors charged to 100 kV in 90 seconds, then discharged at 150 kA and 35 percent reversal. Unattended operation requires sophisticated fault detection, and so much attention has been paid to this. This paper will describe the system, and the key components including the control system, the switches, and the load resistors. The paper will also show some lifetime and performance data from commonly used 200 kV spark gap switches. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Savage, ME (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. 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 BN 0-7803-7915-2 PY 2003 BP 1225 EP 1228 DI 10.1109/PPC.2003.1278034 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000281 ER PT B AU Nunnally, WC Neurath, R Holmes, C Sampayan, S Caporaso, G AF Nunnally, WC Neurath, R Holmes, C Sampayan, S Caporaso, G BE Giesselmann, M Neuber, A TI Investigation of UV laser triggered, nanosecond, surface flashover switches SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB Triggered, multi-channel, surface discharges or surface flashover switching have been investigated as a low inductance, low pulse rate switch for conducting large currents. This paper discusses the investigation of UV (355 run) laser triggered, single channel, low inductance, ns closure and sub-ns jitter switches for applications in switching high dielectric constant, compact pulse forming lines into accelerator loads. The experimental arrangement for evaluating the switch performance and for measuring the high field dielectric constant of the pulse forming lines is presented. Experimental results of delay and jitter measurements versus optical energy on the flashover surface and dc electric field charge. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Nunnally, WC (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 3 TC 5 Z9 9 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7915-2 PY 2003 BP 1355 EP 1358 DI 10.1109/PPC.2003.1278066 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000313 ER PT B AU Rogowski, ST Bliss, DE Adams, RG Struve, KW AF Rogowski, ST Bliss, DE Adams, RG Struve, KW BE Giesselmann, M Neuber, A TI A study of timing jitter improvments on Z with a new laser triggering system SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB A new, low jitter, laser trigger system (LTS) has been installed on the Z machine at Sandia National Laboratories. The installation of the new Tempest LTS has significantly reduced the jitter of the peak x-ray output. The most recent measurements of peak x-ray output show that the new LTS has reduced the jitter from 1sigma approximate to 2.5 ns to 1 sigma < 1 ns. In addition to having inherently less jitter than the old LTS, the independent precision triggering of the new LTS can compensate for timing errors due to drift and shot-to-shot correlations of other pulse power components further reducing the overall machine jitter. Specifically, the LTS compensates for trends in the gas switch runtime. By using a method based on linear prediction coefficients of previous shots, gas switch runtime noise can be further reduced by similar to1 ns. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Rogowski, ST (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. 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 0-7803-7915-2 PY 2003 BP 1371 EP 1374 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000317 ER PT B AU de Lamare, JE AF de Lamare, JE BE Giesselmann, M Neuber, A TI The abort kicker system for the PEP-II storage rings at SLAC SO PPC-2003: 14TH IEEE INTERNATIONAL PULSED POWER CONFERENCE, VOLS 1 AND 2, DIGEST OF TECHNICAL PAPERS LA English DT Proceedings Paper CT 14th IEEE International Pulsed Power Conference CY JUN 15-18, 2003 CL Dallas, TX SP IEEE, Nucl & Plasma Sci Soc AB The PEP-II project has two storage rings. The HER (High Energy Ring) has up to 1.48 A of election beam at 9 GeV, and the LER (Low Energy Ring) has up to 2.14 A of positron beam at 3.1 GeV. To protect the HER and LER beam lines in the event of a ring component failure, each ring has an abort kicker system which directs the beam into a dump when a failure is detected. Due to the high current of the beams, the beam kick is tapered from 100% to 80% in 7.33 muS (the beam transit time around the ring). This taper distributes the energy evenly across the window which separates the ring from the beam dump such that the window is not damaged. The abort kicker trigger is synchronized with the ion clearing gap of the beam allowing for the kicker field to rise from 0-80% while there is no beam in the kicker magnet. Originally the kicker system was designed for a rise time of 370nS [I], but because the ion clearing gap was reduced in half, so was the rise time requirement for the kicker. This report discusses the design of the system interlocks, diagnostics, and modulator with the modifications necessary to accommodate an ion clearing gap of 185nS. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP de Lamare, JE (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 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 BN 0-7803-7915-2 PY 2003 BP 1419 EP 1422 DI 10.1109/PPC.2003.1278082 PG 4 WC Engineering, Electrical & Electronic; Physics, Applied SC Engineering; Physics GA BY88S UT WOS:000189487000329 ER PT J AU Picard, Y Adams, DP Vasile, MJ Ritchey, MB AF Picard, Y Adams, DP Vasile, MJ Ritchey, MB TI Focused ion beam-shaped microtools for ultra-precision machining of cylindrical components SO PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY LA English DT Article DE focused ion beam; microtool; diamond tools microcoil; ultra-precision machining ID FABRICATION; MICROFABRICATION; MICROSTRUCTURES; MICROCOILS; TOOLS; COILS AB Focused ion beam (FIB) sputtering is used to shape a variety of cutting tools with dimensions in the 15-100 mum range and cutting edge radii of curvature of 40 nm. The shape of each microtool is controlled to a pre-specified geometry that includes rake and relief features. We demonstrate tools having rectangular, triangular, and other complex-shaped face designs. A double-triangle tip oil one tool is unique and demonstrates the versatility of the fabrication process. The FIB technique allows observation of the tool during fabrication, and, thus, reproducible features are generated with sub-micron precision. Tools are made from tungsten carbide, high-speed tool steel, and single crystal diamond. Application of FIB-shaped tools in ultra-precision microgrooving tests shows that the cross-section of a machined groove is an excellent replication of the microtool face. Microgrooves on 40-150 mum pitch are cut into 3 mm diameter polymer rods, for groove arc lengths greater than 12 cm. The surface finish of machined features is also reported; groove roughness (R-a) is typically less than 0.2 mum. Ultra-precision machining of cylindrical substrates is extended to make bound metal microcoils having feature sizes of 20-40 mum. (C) 2002 Elsevier Science Inc. All rights reserved. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Sandia Natl Labs, POB 5800,MS 0959, Albuquerque, NM 87185 USA. EM dpadams@sandia.gov OI Picard, Yoosuf/0000-0002-2853-5213 NR 33 TC 56 Z9 63 U1 6 U2 14 PU ELSEVIER SCIENCE INC PI NEW YORK PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA SN 0141-6359 EI 1873-2372 J9 PRECIS ENG JI Precis. Eng.-J. Int. Soc. Precis. Eng. Nanotechnol. PD JAN PY 2003 VL 27 IS 1 BP 59 EP 69 AR PII S0141-6359(02)00188-5 DI 10.1016/S0141-6359(02)00188-5 PG 11 WC Engineering, Multidisciplinary; Engineering, Manufacturing; Nanoscience & Nanotechnology; Instruments & Instrumentation SC Engineering; Science & Technology - Other Topics; Instruments & Instrumentation GA 635NT UT WOS:000180406200008 ER PT S AU Friar, JL AF Friar, JL BE Karshenboim, SG Smirnov, VB TI The structure of light nuclei and its effect on precise atomic measurements SO PRECISION PHYSICS OF SIMPLE ATOMIC SYSTEMS SE LECTURE NOTES IN PHYSICS LA English DT Proceedings Paper CT International Conference on Precision Physics of Simple Atomic Systems (PSAS 2002) CY JUN 30-JUL 04, 2002 CL ST PETERSBURG, RUSSIA SP Russian Fdn Basic Res, Russian Ctr Laser Phys, D I Mendeleev Inst Metrol, Max Planck Inst Quantenoptik ID MAGNETIC FORM-FACTORS; PARTIAL-WAVE ANALYSIS; ELECTRIC POLARIZABILITY; LAMB-SHIFT; CHIRAL LAGRANGIANS; CHARGE RADIUS; ENERGY-LEVELS; GROUND-STATE; MUONIC ATOMS; RADIATIVE CORRECTION AB This review consists of three parts: (a) what every atomic physicist needs to know about the physics of light nuclei; (b) what unclear physicists can do for atomic physics; (c) what atomic physicists can do for nuclear physics. A brief qualitative overview of the nuclear force and calculational techniques for light nuclei will be presented, with an emphasis on debunking myths and on recent progress in the field. Nuclear quantities that affect precise atomic measurements will be discussed, together with their current theoretical and experimental status. The final topic will be a discussion of those atomic measurements that would be useful to nuclear physics, and nuclear calculations that would improve our understanding of existing atomic data. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Friar, JL (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. NR 86 TC 4 Z9 4 U1 1 U2 1 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0075-8450 BN 3-540-40489-9 J9 LECT NOTES PHYS PY 2003 VL 627 BP 59 EP 79 PG 21 WC Physics, Atomic, Molecular & Chemical SC Physics GA BX50F UT WOS:000185511100004 ER PT B AU Marsh, LK AF Marsh, LK BE Marsh, LK TI The nature of fragmentation SO PRIMATES IN FRAGMENTS: ECOLOGY AND CONSERVATION LA English DT Proceedings Paper CT 18th Congress of the International-Primatological-Society CY JAN 07-12, 2001 CL ADELAIDE, AUSTRALIA SP Int Primatol Soc ID TROPICAL RAIN-FOREST; NATURE-RESERVES; CONSERVATION; PRIMATES; ECOLOGY; RESPONSES; MEXICO C1 Los Alamos Natl Lab, Ecol Grp, RRES ECO, Los Alamos, NM 87545 USA. RP Marsh, LK (reprint author), Los Alamos Natl Lab, Ecol Grp, RRES ECO, Mail Stop M887, Los Alamos, NM 87545 USA. NR 61 TC 19 Z9 29 U1 1 U2 7 PU KLUWER ACADEMIC/PLENUM PUBL PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA BN 0-306-47696-7 PY 2003 BP 1 EP 10 PG 10 WC Biodiversity Conservation; Ecology SC Biodiversity & Conservation; Environmental Sciences & Ecology GA BW89Q UT WOS:000183538100001 ER PT B AU Marsh, LK AF Marsh, LK BE Marsh, LK TI Wild zoos: Conservation of primates in situ SO PRIMATES IN FRAGMENTS: ECOLOGY AND CONSERVATION LA English DT Proceedings Paper CT 18th Congress of the International-Primatological-Society CY JAN 07-12, 2001 CL ADELAIDE, AUSTRALIA SP Int Primatol Soc ID FOREST FRAGMENTS; SEED DISPERSAL; DIVERSITY; LANDSCAPE; CORRIDORS C1 Los Alamos Natl Lab, Ecol Grp, RRES, ECO, Los Alamos, NM 87545 USA. RP Marsh, LK (reprint author), Los Alamos Natl Lab, Ecol Grp, RRES, ECO, Mail Stop M887, Los Alamos, NM 87545 USA. NR 88 TC 0 Z9 0 U1 0 U2 1 PU KLUWER ACADEMIC/PLENUM PUBL PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA BN 0-306-47696-7 PY 2003 BP 365 EP 379 PG 15 WC Biodiversity Conservation; Ecology SC Biodiversity & Conservation; Environmental Sciences & Ecology GA BW89Q UT WOS:000183538100023 ER PT B AU Marsh, LK Chapman, CA Norconk, MA Ferrari, SF Gilbert, KA Bicca-Marques, JC Wallis, J AF Marsh, LK Chapman, CA Norconk, MA Ferrari, SF Gilbert, KA Bicca-Marques, JC Wallis, J BE Marsh, LK TI Fragmentation: Specter of the future or the spirit of conservation? SO PRIMATES IN FRAGMENTS: ECOLOGY AND CONSERVATION LA English DT Proceedings Paper CT 18th Congress of the International-Primatological-Society CY JAN 07-12, 2001 CL ADELAIDE, AUSTRALIA SP Int Primatol Soc ID BRACHYTELES-ARACHNOIDES; FOREST FRAGMENTATION; PRIMATES; TRANSMISSION; POPULATIONS; ECOLOGY; MAMMALS C1 Los Alamos Natl Lab, RRES, ECO, Los Alamos, NM 87545 USA. RP Marsh, LK (reprint author), Los Alamos Natl Lab, RRES, ECO, Mail Stop M887, Los Alamos, NM 87545 USA. EM lkmarsh@lanl.gov; lkmarsh@lanl.gov RI Bicca-Marques, Julio Cesar/F-7487-2012 OI Bicca-Marques, Julio Cesar/0000-0002-5400-845X NR 61 TC 10 Z9 10 U1 0 U2 5 PU KLUWER ACADEMIC/PLENUM PUBL PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013 USA BN 0-306-47696-7 PY 2003 BP 381 EP 398 PG 18 WC Biodiversity Conservation; Ecology SC Biodiversity & Conservation; Environmental Sciences & Ecology GA BW89Q UT WOS:000183538100024 ER PT B AU Arris, HW Trujillo, MO Sanchez, RO AF Arris, HW Trujillo, MO Sanchez, RO GP IEEE IEEE TI Epoxy, urethane, silicone; Choice of encapsulant for high reliability magnetic components SO PROCEEDINGS: ELECTRICAL INSULATION CONFERENCE AND ELECTRICAL MANUFACTURING & COIL WINDING TECHNOLOGY CONFERENCE LA English DT Proceedings Paper CT Electrical Insulation Conference/Electrical-Manufacturing-and-Coil-Winding-Association Exposition CY SEP 23-25, 2003 CL INDIANAPOLIS, IN SP IEEE, EMCWA, NEMA DE epoxy; silicone; urethane; encapsulants for; magnetic components AB Sandia National Laboratories has been encapsulating magnetic components for over 40 years. The reliability of magnetic component assemblies that must withstand a variety of environments and then function correctly is dependent on the use of appropriate encapsulating formulations. Specially developed formulations are critical and enable us to provide high reliability magnetic components. This paper will discuss Epoxy, Urethane, and Silicone formulations for several of our magnetic components. C1 Sandia Natl Labs, Livermore, CA 94550 USA. RP Arris, HW (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA. NR 3 TC 0 Z9 0 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7935-7 PY 2003 BP 227 EP 230 DI 10.1109/EICEMC.2003.1247888 PG 4 WC Engineering, Manufacturing; Engineering, Electrical & Electronic; Engineering, Mechanical; Physics, Condensed Matter SC Engineering; Physics GA BX92G UT WOS:000186828400046 ER PT B AU Noufi, R Young, DL Coutts, TJ Gessert, T Ward, JS Duda, A Wu, X Romero, M Dhere, R AbuShama, J AF Noufi, R Young, DL Coutts, TJ Gessert, T Ward, JS Duda, A Wu, X Romero, M Dhere, R AbuShama, J BE Kurokawa, K Kazmerski, LL McNelis, B Yamaguchi, M Wronski, C Sinke, WC TI Toward a 25%-efficient polycrystalline thin-film tandem solar cell: practical issues SO PROCEEDINGS OF 3RD WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS A-C LA English DT Proceedings Paper CT 3rd World Conference on Photovoltaic Energy Conversion CY MAY 11-18, 2003 CL Osaka, JAPAN SP WCPEC-3 Org Comm, Inst Elect, Informat & Commun Engineers, Japan Soc Aeronaut & Space Sci, Chem Soc Japan, Japan Sect Int Solar Energy Soc, Electrochem Soc Japan, Japan Solar Energy Soc AB In this paper, we describe our efforts to date to evaluate possible routes, combination of materials, and device structures toward demonstrating a multijunction polycrystalline thin-film tandem solar cell with efficiency greater than 25%. Our approach uses modeling as a guide to calculate an approximate upper limit of device performance, the range of band gap pairs for top and bottom cells, and the optical resources/losses through the multilayer structure. The combination of materials we chose for the initial study are based on state-of-the-art single junction devices utilizing Cu(In,Ga)Se-2 and CdTe absorbers. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Noufi, R (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 6 TC 5 Z9 7 U1 1 U2 5 PU WCPEC-3 ORGANIZING COMMITTEE PI TOKYO PA TOKYO UNIV AGRICULTURE & TECHNOLOGY, TOKYO, KOGANEI 184-8588, JAPAN PY 2003 BP 12 EP 14 PG 3 WC Energy & Fuels SC Energy & Fuels GA BAK90 UT WOS:000222658800009 ER PT B AU Young, DL Contreras, M Romero, M Asher, S Perkins, C Gessert, T Keane, J Coutts, TJ Noufi, R AF Young, DL Contreras, M Romero, M Asher, S Perkins, C Gessert, T Keane, J Coutts, TJ Noufi, R BE Kurokawa, K Kazmerski, LL McNelis, B Yamaguchi, M Wronski, C Sinke, WC TI Interconnect junctions for thin-film tandem solar cells SO PROCEEDINGS OF 3RD WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS A-C LA English DT Proceedings Paper CT 3rd World Conference on Photovoltaic Energy Conversion CY MAY 11-18, 2003 CL Osaka, JAPAN SP WCPEC-3 Org Comm, Inst Elect, Informat & Commun Engineers, Japan Soc Aeronaut & Space Sci, Chem Soc Japan, Japan Sect Int Solar Energy Soc, Electrochem Soc Japan, Japan Solar Energy Soc AB Polycrystalline thin-film, tandem solar cells promise high efficiencies and high open-circuit voltages. Along with the high-bandgap top cell, a thin-film interconnect junction is one of the more demanding components of a monolithic tandem. We will present electrical, optical, structural, and device-compatibility results from several interconnect junctions grown on Cu(In,Ga)Se-2, CdTe, and Si absorber layers. The physics of an interconnect junction will be discussed as a guide for choosing appropriate materials. Athough emphasis will be placed on several promising transparent p-type materials, results from degenerate n-type materials will also be discussed. Results of an n(+)/p(+) interconnect junction in a monolithic tandem will be presented. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Young, DL (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 12 TC 2 Z9 2 U1 0 U2 1 PU WCPEC-3 ORGANIZING COMMITTEE PI TOKYO PA TOKYO UNIV AGRICULTURE & TECHNOLOGY, TOKYO, KOGANEI 184-8588, JAPAN PY 2003 BP 27 EP 30 PG 4 WC Energy & Fuels SC Energy & Fuels GA BAK90 UT WOS:000222658800013 ER PT B AU Gessert, TA Romero, MJ Dhere, RG Johnston, S Duda, A AF Gessert, TA Romero, MJ Dhere, RG Johnston, S Duda, A BE Kurokawa, K Kazmerski, LL McNelis, B Yamaguchi, M Wronski, C Sinke, WC TI Cross-sectional, spectroscopic cathodoluminlscence studies of the ZNTE : Cu contact process for CDS/CDTE solar cells SO PROCEEDINGS OF 3RD WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS A-C LA English DT Proceedings Paper CT 3rd World Conference on Photovoltaic Energy Conversion CY MAY 11-18, 2003 CL Osaka, JAPAN SP WCPEC-3 Org Comm, Inst Elect, Informat & Commun Engineers, Japan Soc Aeronaut & Space Sci, Chem Soc Japan, Japan Sect Int Solar Energy Soc, Electrochem Soc Japan, Japan Solar Energy Soc ID CDTE AB Cross-sectional spectroscopic cathodoluminescence (CL), light current-voltage (LIV), and capacitance-voltage (CV) measurements are used to study the formation of CdS/CdTe devices contacted using ion-beam milling and sputter deposition of ZnTe:Cu/Ti layers. Prior to contacting, CL reveals significant differences in radiative recombination due to the purity of the CdCl2, source of device material, and the thickness of the CdTe. After contacting, differences in LIV and CV are correlated to CdTe thickness. These differences Support other studies that indicate diffusion from the contact assists in device formation. Although more subtle, differences in radiative recombination are also observed after contacting and suggest separate effects from Cl and Cu diffusion from the CdCl2 and contacting process. C1 NREL, Golden, CO 80401 USA. RP Gessert, TA (reprint author), NREL, 1617 Cole Blvd, Golden, CO 80401 USA. NR 8 TC 1 Z9 2 U1 0 U2 0 PU WCPEC-3 ORGANIZING COMMITTEE PI TOKYO PA TOKYO UNIV AGRICULTURE & TECHNOLOGY, TOKYO, KOGANEI 184-8588, JAPAN PY 2003 BP 348 EP 351 PG 4 WC Energy & Fuels SC Energy & Fuels GA BAK90 UT WOS:000222658800093 ER PT B AU Wu, X Dhere, RG Zhou, J Duda, A Perkins, C Yan, Y Moutinho, HR AF Wu, X Dhere, RG Zhou, J Duda, A Perkins, C Yan, Y Moutinho, HR BE Kurokawa, K Kazmerski, LL McNelis, B Yamaguchi, M Wronski, C Sinke, WC TI High-quality cadmium stannate transparent conductive oxide film for tandem thin-film solar cells SO PROCEEDINGS OF 3RD WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS A-C LA English DT Proceedings Paper CT 3rd World Conference on Photovoltaic Energy Conversion CY MAY 11-18, 2003 CL Osaka, JAPAN SP WCPEC-3 Org Comm, Inst Elect, Informat & Commun Engineers, Japan Soc Aeronaut & Space Sci, Chem Soc Japan, Japan Sect Int Solar Energy Soc, Electrochem Soc Japan, Japan Solar Energy Soc AB In tandem thin-film solar cells with a superstrate device structure, the front transparent conductive oxide (TCO) contact needs high transmission and high conductivity for top cells, as well as higher transmission at the near-infrared wavelength region for bottom cells. Unfortunately, conventional TCOs (such as ITO, SnO2, and ZnO) cannot completely meet these requirements. We developed a high-quality cadmium stannate (Cd2SnO4 or CTO) TCO film, which has transmission of 80%-90% in the region of 4001300 nm and bulk resistivity of similar to1.8 x 10(-4) Omega cm. In the CdTe/CIS tandem thin-film solar cell, the short-circuit current density (J(sc)) loss due to CTO film absorption can be reduced to only 0.6 mA/cm(2) and similar to1.0 mA/cm(2) for the top cell and bottom cell, respectively. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Wu, X (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. NR 7 TC 2 Z9 2 U1 0 U2 3 PU WCPEC-3 ORGANIZING COMMITTEE PI TOKYO PA TOKYO UNIV AGRICULTURE & TECHNOLOGY, TOKYO, KOGANEI 184-8588, JAPAN PY 2003 BP 507 EP 510 PG 4 WC Energy & Fuels SC Energy & Fuels GA BAK90 UT WOS:000222658800134 ER PT B AU Contreras, MA Nakada, T Hongo, M Pudov, AO Sites, JR AF Contreras, MA Nakada, T Hongo, M Pudov, AO Sites, JR BE Kurokawa, K Kazmerski, LL McNelis, B Yamaguchi, M Wronski, C Sinke, WC TI ZnO/ZnS(O,OH)/Cu(In,Ga)Se-2[Mo solar cell with 18.6% efficiency SO PROCEEDINGS OF 3RD WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS A-C LA English DT Proceedings Paper CT 3rd World Conference on Photovoltaic Energy Conversion CY MAY 11-18, 2003 CL Osaka, JAPAN SP WCPEC-3 Org Comm, Inst Elect, Informat & Commun Engineers, Japan Soc Aeronaut & Space Sci, Chem Soc Japan, Japan Sect Int Solar Energy Soc, Electrochem Soc Japan, Japan Solar Energy Soc AB We report on recent enhancements to device performance leading to a certified total-area energy conversion efficiency of 18.6% for Cu(In,Ga)Se-2 solar cells that incorporate a ZnS(O,OH) buffer layer as an alternative to CdS. Along with information on device fabrication and layer properties, we provide a comparative device analysis between this type of solar cell and the slightly more efficient ZnO/CdS/Cu(In,Ga)Se-2/MO solar cell structure. This comparative study allows us to elucidate the areas for optimization in the quest for conversion efficiency above 20% in thin-film polycrystalline solar cells. It quantifies the gains in current generation due to superior collection at short wavelengths, as well as the somewhat lower voltage and infrared response. C1 Natl Renewable Energy Lab, Golden, CO USA. RP Contreras, MA (reprint author), Natl Renewable Energy Lab, Golden, CO USA. NR 5 TC 69 Z9 78 U1 0 U2 19 PU WCPEC-3 ORGANIZING COMMITTEE PI TOKYO PA TOKYO UNIV AGRICULTURE & TECHNOLOGY, TOKYO, KOGANEI 184-8588, JAPAN PY 2003 BP 570 EP 573 PG 4 WC Energy & Fuels SC Energy & Fuels GA BAK90 UT WOS:000222658800150 ER PT B AU Fthenakis, VM Bowerman, B AF Fthenakis, VM Bowerman, B BE Kurokawa, K Kazmerski, LL McNelis, B Yamaguchi, M Wronski, C Sinke, WC TI Environmental health and safety (EHS) issues in III-V solar cell manufacturing SO PROCEEDINGS OF 3RD WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS A-C LA English DT Proceedings Paper CT 3rd World Conference on Photovoltaic Energy Conversion CY MAY 11-18, 2003 CL Osaka, JAPAN SP WCPEC-3 Org Comm, Inst Elect, Informat & Commun Engineers, Japan Soc Aeronaut & Space Sci, Chem Soc Japan, Japan Sect Int Solar Energy Soc, Electrochem Soc Japan, Japan Solar Energy Soc AB Large-scale manufacturing of III-V high-performance photovoltaics will require close attention to environmental, health and safety (EHS) issues. This paper reviews such issues and highlights challenges resulting from using large quantities of arsine, phosphine, and hydrogen in current MOCVD. These gases can be used safely when multi-layers of protection are implemented; these arc discussed herein. The cost related to risk management must be considered in deciding upon new and larger manufacturing facilities. The best way to minimize both the risks associated with hazardous chemicals and the costs of managing risk is to consider safer delivery and/or alternative sources. Alternatives are outlined for scaling up production in the short-term and in the future. C1 Brookhaven Natl Lab, Natl PV EHS Assistance Ctr, Upton, NY 11973 USA. RP Fthenakis, VM (reprint author), Brookhaven Natl Lab, Natl PV EHS Assistance Ctr, POB 5000, Upton, NY 11973 USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU WCPEC-3 ORGANIZING COMMITTEE PI TOKYO PA TOKYO UNIV AGRICULTURE & TECHNOLOGY, TOKYO, KOGANEI 184-8588, JAPAN PY 2003 BP 681 EP 684 PG 4 WC Energy & Fuels SC Energy & Fuels GA BAK90 UT WOS:000222658800175 ER PT B AU Buonassisi, T Vyvenko, OF Istratov, AA Weber, ER Hahn, G Sontag, D Rakotoniaina, JP Breitenstein, O Isenberg, J Schindler, R AF Buonassisi, T Vyvenko, OF Istratov, AA Weber, ER Hahn, G Sontag, D Rakotoniaina, JP Breitenstein, O Isenberg, J Schindler, R BE Kurokawa, K Kazmerski, LL McNelis, B Yamaguchi, M Wronski, C Sinke, WC TI Assessing the role of transition metals in shunting mechanisms using synchrotron-based techniques SO PROCEEDINGS OF 3RD WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS A-C LA English DT Proceedings Paper CT 3rd World Conference on Photovoltaic Energy Conversion CY MAY 11-18, 2003 CL Osaka, JAPAN SP WCPEC-3 Org Comm, Inst Elect, Informat & Commun Engineers, Japan Soc Aeronaut & Space Sci, Chem Soc Japan, Japan Sect Int Solar Energy Soc, Electrochem Soc Japan, Japan Solar Energy Soc ID SILICON SOLAR-CELLS; MULTICRYSTALLINE SILICON; RECOMBINATION; PASSIVATION AB Shunts in RGS and BaySix materials have been analyzed using a powerful combination of techniques including lock-in thermography, x-ray beam induced current, and x-ray fluorescence microscopy. Transition metals have been identified at shunt locations in both materials. Titanium and silver were found at a shunt in BaySix material, suggesting a process-induced defect related to faulty metallization grid deposition. Iron and copper were found at inversion channels in RGS material, suggesting these extended defects are effective gettering sites for transition metals, which enhance the generation-recombination current in this extended space-charge region. The role of transition metals in certain shunting mechanisms in multicrystalline silicon (mc-Si) solar cells is assessed in light of these experimental data. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Buonassisi, T (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd,Bldg 62,Rm 115,MS 62R203, Berkeley, CA 94720 USA. RI Hahn, Giso/D-3111-2013; Vyvenko, Oleg/I-6539-2013 OI Vyvenko, Oleg/0000-0001-6077-3679 NR 14 TC 1 Z9 1 U1 1 U2 4 PU WCPEC-3 ORGANIZING COMMITTEE PI TOKYO PA TOKYO UNIV AGRICULTURE & TECHNOLOGY, TOKYO, KOGANEI 184-8588, JAPAN PY 2003 BP 1120 EP 1123 PG 4 WC Energy & Fuels SC Energy & Fuels GA BAK90 UT WOS:000222658800284 ER PT B AU Wang, TH Page, MR Bauer, RE Ciszek, TF Landry, MD Wang, Q AF Wang, TH Page, MR Bauer, RE Ciszek, TF Landry, MD Wang, Q BE Kurokawa, K Kazmerski, LL McNelis, B Yamaguchi, M Wronski, C Sinke, WC TI Passivation and compatible device processing of APIVT-Si thin layers SO PROCEEDINGS OF 3RD WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS A-C LA English DT Proceedings Paper CT 3rd World Conference on Photovoltaic Energy Conversion CY MAY 11-18, 2003 CL Osaka, JAPAN SP WCPEC-3 Org Comm, Inst Elect, Informat & Commun Engineers, Japan Soc Aeronaut & Space Sci, Chem Soc Japan, Japan Sect Int Solar Energy Soc, Electrochem Soc Japan, Japan Solar Energy Soc ID IODINE VAPOR TRANSPORT AB Improvements have been made in polycrystalline silicon films grown by the atmospheric pressure iodine vapor transport (APIVT) process. With optimized growth conditions, gas-phase nucleation that leads to spurious growth in the bulk and on the film surface can be eliminated. A smoother surface and nearly isotropic growth characteristics are also obtained, compared to films grown earlier. Hot-wire chemical vapor deposition (HWCVD) a-SiNx:H films are used as antireflection coating and passivation layers. A HWCVD-deposited a(muc)-Si emitter reduces the open-circuit voltage loss caused by grain boundaries in the polycrystalline APIVT-Si layers. After thermal annealing at various temperatures, V-oc of the solar cell devices was improved by about 10%, and J(sc) was increased by as much as 46%. Epitaxial growth on silicon seeded substrates, such as metallurgical grade silicon (MG-Si), results in very large grain sizes so that a much less stringent passivation process would be needed. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Wang, TH (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 6 TC 0 Z9 0 U1 0 U2 1 PU WCPEC-3 ORGANIZING COMMITTEE PI TOKYO PA TOKYO UNIV AGRICULTURE & TECHNOLOGY, TOKYO, KOGANEI 184-8588, JAPAN PY 2003 BP 1407 EP 1410 PG 4 WC Energy & Fuels SC Energy & Fuels GA BAK90 UT WOS:000222658800359 ER PT B AU Wang, Q Page, MR Iwaniczko, E Williams, E Yan, Y Wang, TH Ciszek, TF AF Wang, Q Page, MR Iwaniczko, E Williams, E Yan, Y Wang, TH Ciszek, TF BE Kurokawa, K Kazmerski, LL McNelis, B Yamaguchi, M Wronski, C Sinke, WC TI Hot-wire CVD n-type emitter on p-type crystalline Si solar cells SO PROCEEDINGS OF 3RD WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS A-C LA English DT Proceedings Paper CT 3rd World Conference on Photovoltaic Energy Conversion CY MAY 11-18, 2003 CL Osaka, JAPAN SP WCPEC-3 Org Comm, Inst Elect, Informat & Commun Engineers, Japan Soc Aeronaut & Space Sci, Chem Soc Japan, Japan Sect Int Solar Energy Soc, Electrochem Soc Japan, Japan Solar Energy Soc AB We have developed efficient p-type crystalline-Si-based solar cells using a fast (1 min) and low-substrate temperature (<220degreesC) hot-wire CVD technique to deposit n-type Si thin films to form n-p junction. We achieved 13.3% energy conversion efficiency with V-oc of 0.58 V, FF of 0.773, and J(sc) of 29.86 mA/cm(2) under AM 1.5 for a 1-cm(2) solar cell, which is the highest reported efficiency to date for a single-junction device using the hot-wire CVD technique. Transmission electron microscopy reveals epitixal growth of Si at the junction. Quantum efficiency measurement on this solar cell shows over 90% response in the region between 540 and 780 nm, but a relatively weak blue and near infrared response. The solar cells show no degradation after 1000 hours of standard light soaking. C1 NREL, Golden, CO 80401 USA. RP NREL, Golden, CO 80401 USA. NR 9 TC 0 Z9 0 U1 0 U2 0 PU WCPEC-3 ORGANIZING COMMITTEE PI TOKYO PA TOKYO UNIV AGRICULTURE & TECHNOLOGY, TOKYO, KOGANEI 184-8588, JAPAN PY 2003 BP 1427 EP 1430 PG 4 WC Energy & Fuels SC Energy & Fuels GA BAK90 UT WOS:000222658800364 ER PT B AU Mahan, AH AF Mahan, AH BE Kurokawa, K Kazmerski, LL McNelis, B Yamaguchi, M Wronski, C Sinke, WC TI Solar cell research and development using the hot wire CVD process SO PROCEEDINGS OF 3RD WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS A-C LA English DT Proceedings Paper CT 3rd World Conference on Photovoltaic Energy Conversion CY MAY 11-18, 2003 CL Osaka, JAPAN SP WCPEC-3 Org Comm, Inst Elect, Informat & Commun Engineers, Japan Soc Aeronaut & Space Sci, Chem Soc Japan, Japan Sect Int Solar Energy Soc, Electrochem Soc Japan, Japan Solar Energy Soc ID CHEMICAL-VAPOR-DEPOSITION; AMORPHOUS-SILICON; FILMS; JAPAN; HWCVD AB This article reviews the research and development of solar cells fabricated using the Hot Wire CVD (HWCVD) process. A short history of the technique is given, and the advantages of this deposition technique as they relate to solar cell fabrication are quantified. A chronological history of solar cell fabrication involving three major research groups, with a long history in HWCVD solar cell fabrication, is then given, as such histories illustrate the evolution of solar cell research involving HWCVD. Illustrative examples of activities of new research groups entering this field are then discussed, and the outlook for this field is given. C1 NREL, Golden, CO 80401 USA. RP Mahan, AH (reprint author), NREL, 1617 Cole Blvd, Golden, CO 80401 USA. NR 37 TC 1 Z9 1 U1 0 U2 2 PU WCPEC-3 ORGANIZING COMMITTEE PI TOKYO PA TOKYO UNIV AGRICULTURE & TECHNOLOGY, TOKYO, KOGANEI 184-8588, JAPAN PY 2003 BP 1556 EP 1561 PG 6 WC Energy & Fuels SC Energy & Fuels GA BAK90 UT WOS:000222658800396 ER PT B AU Fthenakis, VM AF Fthenakis, VM BE Kurokawa, K Kazmerski, LL McNelis, B Yamaguchi, M Wronski, C Sinke, WC TI Hazard analysis for the protection of PV manufacturing facilities SO PROCEEDINGS OF 3RD WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS A-C LA English DT Proceedings Paper CT 3rd World Conference on Photovoltaic Energy Conversion CY MAY 11-18, 2003 CL Osaka, JAPAN SP WCPEC-3 Org Comm, Inst Elect, Informat & Commun Engineers, Japan Soc Aeronaut & Space Sci, Chem Soc Japan, Japan Sect Int Solar Energy Soc, Electrochem Soc Japan, Japan Solar Energy Soc AB Photovoltaic manufacturing facilities use toxic, corrosive or flammable substances, which, if not handled properly can present environmental, health and safety (EHS) risks. Although the amounts of hazardous substances used in the PV industry are far smaller than those used in the chemical industry, such substances can present EHS hazards. As PV manufacturing is scaled-up to meet a growing demand, preserving the safe and friendly to the environment nature of PV becomes even more important. This paper presents a systematic approach and specific methods of accident prevention that are available to the industry, As the PV industry approaches accident prevention in a systematic and vigilant way, the risk to the industry and the public will be minimized. C1 Brookhaven Natl Lab, Natl PV EHS Assist Ctr, Upton, NY 11973 USA. RP Fthenakis, VM (reprint author), Brookhaven Natl Lab, Natl PV EHS Assist Ctr, POB 5000, Upton, NY 11973 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU WCPEC-3 ORGANIZING COMMITTEE PI TOKYO PA TOKYO UNIV AGRICULTURE & TECHNOLOGY, TOKYO, KOGANEI 184-8588, JAPAN PY 2003 BP 2090 EP 2093 PG 4 WC Energy & Fuels SC Energy & Fuels GA BAK90 UT WOS:000222658800531 ER PT B AU King, RJ Warner, C AF King, RJ Warner, C BE Kurokawa, K Kazmerski, LL McNelis, B Yamaguchi, M Wronski, C Sinke, WC TI Solar Decathlon: Energy we can live with SO PROCEEDINGS OF 3RD WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS A-C LA English DT Proceedings Paper CT 3rd World Conference on Photovoltaic Energy Conversion CY MAY 11-18, 2003 CL Osaka, JAPAN SP WCPEC-3 Org Comm, Inst Elect, Informat & Commun Engineers, Japan Soc Aeronaut & Space Sci, Chem Soc Japan, Japan Sect Int Solar Energy Soc, Electrochem Soc Japan, Japan Solar Energy Soc AB The Solar Decathlon is a competition to design, build and operate the most effective and attractive house powered solely by the sun. The U.S. Department of Energy proudly sponsors the international competition for college level Students. The competition is designed to showcase "energy we can live with", meaning solar and energy efficiency technologies that are not only viable today, but are also unobtrusive features of homes that fit gracefully into our modern lifestyles. Fourteen University teams from the U.S., including Puerto Rico, competed in the 2002 Solar Decathlon at the National Mail in Washington, D.C, Construction of file solar village began on September 19(th), 2002. Seven days later on September 26(th), the Solar Decathlon began and ten days of intense competition followed. On Saturday, October 5(th), the University of Colorado at Boulder won the first ever competition. C1 US DOE, Photovolt R&D Program, Washington, DC 20585 USA. RP King, RJ (reprint author), US DOE, Photovolt R&D Program, 1000 Independence Ave SW, Washington, DC 20585 USA. NR 1 TC 2 Z9 2 U1 0 U2 0 PU WCPEC-3 ORGANIZING COMMITTEE PI TOKYO PA TOKYO UNIV AGRICULTURE & TECHNOLOGY, TOKYO, KOGANEI 184-8588, JAPAN PY 2003 BP 2139 EP 2142 PG 4 WC Energy & Fuels SC Energy & Fuels GA BAK90 UT WOS:000222658800542 ER PT B AU Surek, T AF Surek, T BE Kurokawa, K Kazmerski, LL McNelis, B Yamaguchi, M Wronski, C Sinke, WC TI Progress in US photovoltaics: Looking back 30 years and looking ahead SO PROCEEDINGS OF 3RD WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS A-C LA English DT Proceedings Paper CT 3rd World Conference on Photovoltaic Energy Conversion CY MAY 11-18, 2003 CL Osaka, JAPAN SP WCPEC-3 Org Comm, Inst Elect, Informat & Commun Engineers, Japan Soc Aeronaut & Space Sci, Chem Soc Japan, Japan Sect Int Solar Energy Soc, Electrochem Soc Japan, Japan Solar Energy Soc AB The development of terrestrial photovoltaics (PV) began in response to the oil crises of the 1970s. Over the past 30 years, PV researchers discovered new materials, devices, and fabrication approaches, improved device efficiency and reliability, and lowered module and system costs. Concerns over the global environment, as well as the worldwide efforts to seek alternate, indigenous sources of energy, continue to drive the investment in PV research and deployment. This paper reviews the most significant advances in U.S. research efforts over the past 30 years, and examines several scenarios for advancements in PV technologies and markets in the next 20 years. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Surek, T (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. NR 1 TC 2 Z9 2 U1 0 U2 2 PU WCPEC-3 ORGANIZING COMMITTEE PI TOKYO PA TOKYO UNIV AGRICULTURE & TECHNOLOGY, TOKYO, KOGANEI 184-8588, JAPAN PY 2003 BP 2507 EP 2512 PG 6 WC Energy & Fuels SC Energy & Fuels GA BAK90 UT WOS:000222658800636 ER PT B AU King, RJ AF King, RJ BE Kurokawa, K Kazmerski, LL McNelis, B Yamaguchi, M Wronski, C Sinke, WC TI The US photovoltaic research program SO PROCEEDINGS OF 3RD WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS A-C LA English DT Proceedings Paper CT 3rd World Conference on Photovoltaic Energy Conversion CY MAY 11-18, 2003 CL Osaka, JAPAN SP WCPEC-3 Org Comm, Inst Elect, Informat & Commun Engineers, Japan Soc Aeronaut & Space Sci, Chem Soc Japan, Japan Sect Int Solar Energy Soc, Electrochem Soc Japan, Japan Solar Energy Soc AB The United States Fiscal Year 2003 Photovoltaic R&D Program is described in this paper. With a $73 million budget, emphasis is placed on long-term innovative research, thin film development, manufacturing R&D, and systems development and reliability. Long-term research is focused on "leap-frog" technologies with the potential to dramatically reduce the cost of solar electricity. In thin films, new levels of efficiency and stability in prototype modules have been achieved, as well as higher laboratory cell efficiencies that will have implications for the PV products deployed in terrestrial systems and applications. Near-term research is focused on reducing cost through manufacturing advancements and by improving system reliability. C1 US DOE, Solar Enegy Technol Program, Washington, DC 20585 USA. RP King, RJ (reprint author), US DOE, Solar Enegy Technol Program, 1000 Independence Ave SW, Washington, DC 20585 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WCPEC-3 ORGANIZING COMMITTEE PI TOKYO PA TOKYO UNIV AGRICULTURE & TECHNOLOGY, TOKYO, KOGANEI 184-8588, JAPAN PY 2003 BP 2527 EP 2530 PG 4 WC Energy & Fuels SC Energy & Fuels GA BAK90 UT WOS:000222658800640 ER PT B AU Fthenakis, V Morris, S AF Fthenakis, V Morris, S BE Kurokawa, K Kazmerski, LL McNelis, B Yamaguchi, M Wronski, C Sinke, WC TI Markal analysis of PV capacity and CO2 emissions' reduction in the US SO PROCEEDINGS OF 3RD WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS A-C LA English DT Proceedings Paper CT 3rd World Conference on Photovoltaic Energy Conversion CY MAY 11-18, 2003 CL Osaka, JAPAN SP WCPEC-3 Org Comm, Inst Elect, Informat & Commun Engineers, Japan Soc Aeronaut & Space Sci, Chem Soc Japan, Japan Sect Int Solar Energy Soc, Electrochem Soc Japan, Japan Solar Energy Soc AB This analysis compares market penetration of grid-connected PV in the U.S. in the context of a fully competitive market. The MARKAL-MACRO integrated energy-environmental-economic model was used to simulate the US energy capacity for the next 30 years. Photovoltaic technologies were assumed to compete on cost alone with 52 other energy generation technologies in the US, in a deregulated environment. It was shown that PV can become cost-effective in both distributed and central power applications in the US, if current expectations of performance and cost reductions materialize. The predictions of this analysis compare well with the goals of the US Photovoltaic Industry Roadmap. C1 Brookhaven Natl Lab, Dept Environm Sci, Upton, NY 11973 USA. RP Fthenakis, V (reprint author), Brookhaven Natl Lab, Dept Environm Sci, POB 5000, Upton, NY 11973 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU WCPEC-3 ORGANIZING COMMITTEE PI TOKYO PA TOKYO UNIV AGRICULTURE & TECHNOLOGY, TOKYO, KOGANEI 184-8588, JAPAN PY 2003 BP 2607 EP 2609 PG 3 WC Energy & Fuels SC Energy & Fuels GA BAK90 UT WOS:000222658800660 ER PT B AU Contreras, MA Romero, M Young, D AF Contreras, MA Romero, M Young, D BE Kurokawa, K Kazmerski, LL McNelis, B Yamaguchi, M Wronski, C Sinke, WC TI Optimization of CuGaSe2 for wide-bandgap solar cells SO PROCEEDINGS OF 3RD WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS A-C LA English DT Proceedings Paper CT 3rd World Conference on Photovoltaic Energy Conversion CY MAY 11-18, 2003 CL Osaka, JAPAN SP WCPEC-3 Org Comm, Inst Elect, Informat & Commun Engineers, Japan Soc Aeronaut & Space Sci, Chem Soc Japan, Japan Sect Int Solar Energy Soc, Electrochem Soc Japan, Japan Solar Energy Soc ID THIN-FILMS; PHOTOLUMINESCENCE; RECOMBINATION; DEFECTS AB We report on enhancements to CuGaSe2 film quality and their application to photovoltaic devices with high-voltage and low-current outputs. Using co-evaporation from elemental sources for film growth, we study deposition parameters such as substrate temperature and selenium overpressure to investigate their effect on film quality and device performance. Similar to CuInSe2 materials, high Se overpressures change structural aspects of the CuGaSe2 films, particularly those related to preferred orientation. Additionally, the use of higher substrate temperatures (>600degreesC), also leads to significant changes on film morphology, optoelectronic properties, and device performance. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Contreras, MA (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. NR 16 TC 0 Z9 0 U1 0 U2 1 PU WCPEC-3 ORGANIZING COMMITTEE PI TOKYO PA TOKYO UNIV AGRICULTURE & TECHNOLOGY, TOKYO, KOGANEI 184-8588, JAPAN PY 2003 BP 2864 EP 2868 PG 5 WC Energy & Fuels SC Energy & Fuels GA BAK90 UT WOS:000222658800716 ER PT B AU Osterwald, CR Benner, JP Pruett, J Anderberg, A Rummel, S Ottoson, L AF Osterwald, CR Benner, JP Pruett, J Anderberg, A Rummel, S Ottoson, L BE Kurokawa, K Kazmerski, LL McNelis, B Yamaguchi, M Wronski, C Sinke, WC TI Degradation in weathered crystalline-silicon PV modules apparently caused by UV radiation SO PROCEEDINGS OF 3RD WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION, VOLS A-C LA English DT Proceedings Paper CT 3rd World Conference on Photovoltaic Energy Conversion CY MAY 11-18, 2003 CL Osaka, JAPAN SP WCPEC-3 Org Comm, Inst Elect, Informat & Commun Engineers, Japan Soc Aeronaut & Space Sci, Chem Soc Japan, Japan Sect Int Solar Energy Soc, Electrochem Soc Japan, Japan Solar Energy Soc AB Recently, we presented the results of a 5-year solar weathering study of commercial crystalline-Si modules that found a linear relationship between the observed slow (0.2% - 0.5% per year) short-circuit current (I-SC) degradation and the total UV exposure dose. Consideration of previous literature reports of Is, degradation against our results indicated that encapsulation browning cannot be identified as the cause. This paper reviews these results and outlines a new testing program recently initiated at NREL. The program will attempt to verify if UV radiation is responsible for the degradation and determine if the degradation is related to the rapid initial light-induced metastability caused by oxygen contamination in boron-doped Si solar cells. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Osterwald, CR (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. NR 11 TC 2 Z9 3 U1 1 U2 7 PU WCPEC-3 ORGANIZING COMMITTEE PI TOKYO PA TOKYO UNIV AGRICULTURE & TECHNOLOGY, TOKYO, KOGANEI 184-8588, JAPAN PY 2003 BP 2911 EP 2915 PG 5 WC Energy & Fuels SC Energy & Fuels GA BAK90 UT WOS:000222658800724 ER PT B AU Tucker, BJ Bender, DA Pollock, DG Wolcott, MP AF Tucker, BJ Bender, DA Pollock, DG Wolcott, MP BE Beall, FC TI Ultrasonic plate wave evaluation of natural fiber composite panels SO Proceedings of the 13th International Symposium on Nondestructive Testing of Wood LA English DT Proceedings Paper CT 13th International Symposium on Nondestructive Testing of Wood CY AUG 19-21, 2002 CL Univ Calf Berkeley, Berkeley, CA SP Forest Products Lab HO Univ Calf Berkeley ID NDE AB Two key shortcomings of many current ultrasonic nondestructive evaluation (NDE) techniques for wood products are the reliance on empirical correlations and the neglect of valuable waveform information. This study examined the feasibility of using fundamental physical relationships along with advanced signal analysis to nondestructively evaluate elastic material properties in natural fiber-based composite panels. An ultrasonic tone burst system was used to excite and receive antisymmetric plate waves in a variety of fiber-based composite panels. Dispersion curves were constructed exhibiting the variation of antisymmetric phase velocity with frequency. Based on fundamental plate wave propagation theory, flexural and transverse shear rigidity values were obtained from the dispersion curves. Excellent agreement was obtained between NDE and mechanical testing for most panels. This fundamental research advances the state-of-the-art of wood composite panel NDE by providing a more thorough understanding of plate wave propagation and presenting a technique for direct measurement of elastic material properties. C1 Pacific NW Natl Lab, Richland, WA USA. RP Tucker, BJ (reprint author), Pacific NW Natl Lab, Richland, WA USA. NR 20 TC 0 Z9 0 U1 0 U2 1 PU FOREST PRODUCTS RESEARCH SOC PI MADISON PA 2801 MARSHALL COURT, MADISON, WI 53705 USA PY 2003 BP 221 EP 227 PG 7 WC Materials Science, Paper & Wood; Materials Science, Characterization & Testing SC Materials Science GA BCC10 UT WOS:000228553500032 ER PT B AU Smoot, GF AF Smoot, GF BE He, XG Ng, KW TI Our age of precision cosmology SO PROCEEDINGS OF THE 2002 INTERNATIONAL SYMPOSIUM ON COSMOLOGY AND PARTICLE ASTROPHYSICS LA English DT Proceedings Paper CT International Symposium on Cosmology and Particle Astrophysics CY MAY 31-JUN 02, 2002 CL Taipei, TAIWAN SP CosOA Ctr, Minist Educ, Natl Sci Council, Natl Taiwan Univ AB This talk addresses the current state of cosmology. I put forward two theses: (1) We have entered an era of precision cosmology. (2) New Physics is being sought as a result of this success. The combination of these two make both for as sense of excitement and crisis. The talks at this CosPA conference serve to illustrate and support these two theses and point a way toward the future. C1 Univ Calif Berkeley, Dept Phys, LBNL, Berkeley, CA 94720 USA. RP Smoot, GF (reprint author), Univ Calif Berkeley, Dept Phys, LBNL, Berkeley, CA 94720 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA PO BOX 128 FARRER RD, SINGAPORE 9128, SINGAPORE BN 981-238-284-4 PY 2003 BP 315 EP 325 PG 11 WC Astronomy & Astrophysics; Physics, Multidisciplinary SC Astronomy & Astrophysics; Physics GA BCJ48 UT WOS:000229639400024 ER PT B AU Nelson, EA Specht, WL Bowers, JA Gadden, JB AF Nelson, EA Specht, WL Bowers, JA Gadden, JB BE Uzochukwu, GA Schimmel, K Reddy, GB Chang, SY Kabadi, V TI Constructed wetlands for removal of heavy metals from NPDES outfall effluent SO PROCEEDINGS OF THE 2002 NATIONAL CONFERENCE ON ENVIRONMENTAL SCIENCE AND TECHNOLOGY LA English DT Proceedings Paper CT National Conference on Environmental Science and Technology CY SEP 08-10, 2002 CL GREENSBORO, NC SP N Carolina A & T State Univ, Univ N Carolina Chaple Hill, N Carolina State Univ, Univ Texas Austin, US EPA, US DOE, Natl Sci Fdn AB The A-01 NPDES outfall at the Savannah River Site receives process wastewater discharges and stormwater runoff from the Savannah River Technology Center. Routine monitoring indicated that Cu++ concentrations were regularly higher than discharge permit limit, necessitating treatment of nearly one million gallons of water each day plus storm runoff to meet compliance standards. A conceptual design for a constructed treatment wetland was developed as the most cost-effective alternative. A pilot study was conducted using mesocosms to confirm that the design concept would reduce Cu++ to acceptable levels. After treatment in the mesocosms, effluent Cu++ concentrations were routinely below permit limits, even though the influent concentrations varied widely. During the research phase the wetland system was also effective at reducing total and dissolved Hg++. Constructed in the summer of 2000, the treatment system consists of four pairs of one-acre (0.4 hectares) wetland cells (eight acres (3.24 hectares) total) with water flowing from one cell to a second cell, then to the discharge point. The cells are vegetated with Scirpus californicus, and water retention time in the system is approximately 48 hours. Results of the full-scale system during the operation start-up phase have mimicked those generated by the mesocosm study. Cu++ concentrations at the effluent discharge are often below detection limits (10 mug/L), and total Hg++ concentrations are reduced throughout the water path through the wetland system. Cu++ removal efficiency was excellent from the start-up of the system, while Hg++ efficiency has improved with maturation of the treatment cells. Vegetation development within the cells has been excellent, surpassing 2.5 kg/sq. meter of dry above-ground biomass. Operation and maintenance of the system is minimal, and mainly consists of checking for growth of the vegetation and free flow of the water through the system. This has provided a low cost construction option and low cost maintenance program for the effective treatment of large volumes of permitted water discharges from an industrial area. C1 Westinghouse Savannah River Corp, Savannah River Technol Ctr, Aiken, SC USA. RP Nelson, EA (reprint author), Westinghouse Savannah River Corp, Savannah River Technol Ctr, Aiken, SC USA. NR 5 TC 2 Z9 2 U1 0 U2 4 PU BATTELLE PRESS PI COLUMBUS PA 505 KING AVE, COLUMBUS, OH 43201 USA BN 1-57477-138-8 PY 2003 BP 13 EP 21 PG 9 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA BX78H UT WOS:000186424500002 ER PT B AU Zhang, CL Brooks, S Jardine, PM Vali, H AF Zhang, CL Brooks, S Jardine, PM Vali, H BE Uzochukwu, GA Schimmel, K Reddy, GB Chang, SY Kabadi, V TI Factors affecting microbial uranium reduction: Implications for bioremediation SO PROCEEDINGS OF THE 2002 NATIONAL CONFERENCE ON ENVIRONMENTAL SCIENCE AND TECHNOLOGY LA English DT Proceedings Paper CT National Conference on Environmental Science and Technology CY SEP 08-10, 2002 CL GREENSBORO, NC SP N Carolina A & T State Univ, Univ N Carolina Chaple Hill, N Carolina State Univ, Univ Texas Austin, US EPA, US DOE, Natl Sci Fdn ID DESULFOVIBRIO-DESULFURICANS; U(VI) REDUCTION; BACTERIUM; FE(III) AB Batch experiments were conducted to evaluate effects of environmental factors on U(VI) reduction by resting cells of Shewanella algae strain BrY Rates of U(VI) reduction were examined at temperature 10-45degreesC, pH4-8, and dissolved-oxygen 0.0-8.6 mg/L. Rate of U(VI) reduction was fastest at 45degreesC (rate constant = 0.2/hr) and slowest at 10 degreesC (rate constant = 0.02/hr). Holding temperature constant (20degreesC), rate of U(VI) reduction increased with increasing pH; rate constant increased from < 0.01/hr at pH4 to 0.08/hr at pH 8. In abiotic controls, however, increases in pH had little effect on U(VI) reduction, and the decrease in U(VI) was less than 15% of initial concentration, compared with > 80% in cell suspensions at the same pH. Oxygen content had little effect on U(VI) reduction when dissolved oxygen was < 1.0 mg/L; at 8.6 mg/L concentration, however, reduction of U(VI) decreased by eight- to 10-fold. These results demonstrated that reduction of U(VI) was enhanced at temperature, pH, and redox conditions conducive to anaerobic growth or enzymatic viability of the metal-reducing bacterium. Transmission electron microscopy showed uranium mineral precipitation on cell membrane, suggesting that BrY effectively immobilized soluble uranium under the conditions examined. C1 Savannah River Ecol Lab, Aiken, SC USA. RP Zhang, CL (reprint author), Savannah River Ecol Lab, Aiken, SC USA. RI Vali, Hojatollah/F-3511-2012 OI Vali, Hojatollah/0000-0003-3464-9943 NR 16 TC 2 Z9 2 U1 0 U2 0 PU BATTELLE PRESS PI COLUMBUS PA 505 KING AVE, COLUMBUS, OH 43201 USA BN 1-57477-138-8 PY 2003 BP 99 EP 109 PG 11 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA BX78H UT WOS:000186424500010 ER PT B AU Seaman, JC Aburime, SA Hutchison, JM Singer, JH AF Seaman, JC Aburime, SA Hutchison, JM Singer, JH BE Uzochukwu, GA Schimmel, K Reddy, GB Chang, SY Kabadi, V TI Evaluating vadose transport processes using centrifugation methods SO PROCEEDINGS OF THE 2002 NATIONAL CONFERENCE ON ENVIRONMENTAL SCIENCE AND TECHNOLOGY LA English DT Proceedings Paper CT National Conference on Environmental Science and Technology CY SEP 08-10, 2002 CL GREENSBORO, NC SP N Carolina A & T State Univ, Univ N Carolina Chaple Hill, N Carolina State Univ, Univ Texas Austin, US EPA, US DOE, Natl Sci Fdn ID FLOW AB Most subsurface contamination events involve migration through the vadose zone (i.e., unsaturated) before reaching an aquifer; however, research efforts generally focus on processes occurring below the water table, in part, due to the difficulty in mimicking vadose processes in the laboratory. Traditionally, researchers have used vacuum systems to apply tension at the bottom of a soil column as a means of establishing steady flow under unsaturated conditions-Such experimental methods, however, are time consuming, limited to a very narrow range of practical moisture contents, and susceptible to mechanical failure due to long experiment times. The Unsaturated Flow Apparatus (UFA) consists of a centrifuge with a modified rotor and pump system that can apply a controlled stream of tracer solution to the surface of two soil columns while they are spinning. In addition, the UFA can be used to determine the unsaturated hydraulic conductivity and matric potential for porous media much faster than conventional lab techniques, such as pressure plates. The advantages and limitations of such a centrifuge system for evaluating vadose transport processes will be discussed through several relevant environmental examples. C1 Savannah River Ecol Lab, Aiken, SC 29802 USA. RP Seaman, JC (reprint author), Savannah River Ecol Lab, Aiken, SC 29802 USA. NR 6 TC 0 Z9 0 U1 1 U2 1 PU BATTELLE PRESS PI COLUMBUS PA 505 KING AVE, COLUMBUS, OH 43201 USA BN 1-57477-138-8 PY 2003 BP 233 EP 242 PG 10 WC Engineering, Environmental; Environmental Sciences SC Engineering; Environmental Sciences & Ecology GA BX78H UT WOS:000186424500022 ER PT S AU Leming, SK Stalford, HL AF Leming, SK Stalford, HL GP AAC AAC TI Bridge weigh-in-motion system development using superposition of dynamic truck/static bridge interaction SO PROCEEDINGS OF THE 2003 AMERICAN CONTROL CONFERENCE, VOLS 1-6 SE PROCEEDINGS OF THE AMERICAN CONTROL CONFERENCE LA English DT Proceedings Paper CT Annual American Control Conference (ACC 2003) CY JUN 04, 2003-JUN 06, 2006 CL DENVER, CO SP Amer Automat Control Council, IFAC AB In this paper, we extend the development of a weigh-in-motion (WIM) system for use on in-service highway bridges. We consider the problem of using a bridge's elastic response due to a passing truck to estimate the unknown truck parameters axle spacing, speed, axle weights, and gross weight by minimizing the difference between measured deflection profiles and approximated ones. For this problem, the bridge is modeled as a static Euler beam, and the truck is modeled as two "quarter cars" which include a linear representation of the suspension dynamics. A general model of the truck is discussed which is a superposition of the solutions of the truck's equations of motion with parameters such as weight, natural frequencies, dampings, and initial conditions unknown. Three deflection measurements are taken along the beam over time, and an optimization routine is employed to estimate the values of the unknown truck parameters. A variety of different truck configurations are considered. With zero measurement noise in the data, the errors in the weight estimates were 0.3%. Measurement noise of different magnitudes up to 10 microns was then added to the data and the estimates of all truck parameters were within 1.5%. C1 Univ Oklahoma, Sandia Natl Labs, Norman, OK 73019 USA. RP Leming, SK (reprint author), Univ Oklahoma, Sandia Natl Labs, Norman, OK 73019 USA. NR 11 TC 3 Z9 3 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0743-1619 BN 0-7803-7896-2 J9 P AMER CONTR CONF PY 2003 BP 815 EP 820 PG 6 WC Automation & Control Systems SC Automation & Control Systems GA BX87J UT WOS:000186706200140 ER PT S AU Dixon, WE Fang, Y Dawson, DM Flynn, TJ AF Dixon, WE Fang, Y Dawson, DM Flynn, TJ GP AAC AAC TI Range identification for perspective vision systems SO PROCEEDINGS OF THE 2003 AMERICAN CONTROL CONFERENCE, VOLS 1-6 SE PROCEEDINGS OF THE AMERICAN CONTROL CONFERENCE LA English DT Proceedings Paper CT Annual American Control Conference (ACC 2003) CY JUN 04, 2003-JUN 06, 2006 CL DENVER, CO SP Amer Automat Control Council, IFAC ID OBSERVER; MOTION AB In this paper, a new continuous observer is developed to determine range information (and hence the 3-dimensional (3D) coordinates) of an object feature moving with affine motion dynamics (or the more general Riccati motion dynamics) with known motion parameters. The unmeasurable range information is determined from a single camera provided an observability condition is satisfied that has physical significance. To develop the observer, the perspective system is expressed in terms of the nonlinear feature dynamics. The structure of the proposed observer is inspired by recent disturbance observer results. The proposed technique facilitates a Lyapunov-based analysis that is less complex than the sliding-mode based analysis derived for recent discontinuous observer designs. The analysis demonstrates that the 3D taskspace coordinates of the feature point can be asymptotically identified. C1 Oak Ridge Natl Lab, Engn Sci & Tech Div, Oak Ridge, TN 37831 USA. RP Dixon, WE (reprint author), Oak Ridge Natl Lab, Engn Sci & Tech Div, POB 2008, Oak Ridge, TN 37831 USA. NR 10 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0743-1619 BN 0-7803-7896-2 J9 P AMER CONTR CONF PY 2003 BP 3448 EP 3453 PG 6 WC Automation & Control Systems SC Automation & Control Systems GA BX87J UT WOS:000186706200587 ER PT S AU Stol, KA AF Stol, KA GP AAC AAC TI Time-varying control of wind turbines SO PROCEEDINGS OF THE 2003 AMERICAN CONTROL CONFERENCE, VOLS 1-6 SE PROCEEDINGS OF THE AMERICAN CONTROL CONFERENCE LA English DT Proceedings Paper CT Annual American Control Conference (ACC 2003) CY JUN 04, 2003-JUN 06, 2006 CL DENVER, CO SP Amer Automat Control Council, IFAC AB This paper introduces the use of time-varying modem control theory for wind turbine applications. The dynamics of an operating wind turbine are periodic in time due to the rotational motion of its blades. One cannot then use common linear time-invariant control principles to guarantee closed-loop stability or desirable performance. Periodic state-space control can be employed, whereby both the feedback gains and state estimator are periodic. Such ideas have been utilized in simulation studies to yield superior results for multi-objective problems. C1 Natl Renewable Energy Lab, Natl Wind Technol Ctr, Golden, CO 80401 USA. RP Stol, KA (reprint author), Natl Renewable Energy Lab, Natl Wind Technol Ctr, 1617 Cole Blvd, Golden, CO 80401 USA. NR 3 TC 3 Z9 3 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0743-1619 BN 0-7803-7896-2 J9 P AMER CONTR CONF PY 2003 BP 3796 EP 3796 PG 1 WC Automation & Control Systems SC Automation & Control Systems GA BX87J UT WOS:000186706200645 ER PT S AU Tchikanda, S Lee, KM Zhou, Z AF Tchikanda, S Lee, KM Zhou, Z GP IEEE IEEE TI A state space model for modern feedback control of optical fiber drawing process SO PROCEEDINGS OF THE 2003 IEEE/ASME INTERNATIONAL CONFERENCE ON ADVANCED INTELLIGENT MECHATRONICS (AIM 2003), VOLS 1 AND 2 SE IEEE ASME International Conference on Advanced Intelligent Mechatronics LA English DT Proceedings Paper CT IEEE/ASME International Conference on Advanced Intelligent Mechatronics CY JUL 20-24, 2003 CL KOBE, JAPAN SP IEEE Ind Elect Soc, IEEE Robot & Automat Soc, ASME Dynam Syst & Control Div AB Fiber diameter nonuniformities in optical fiber drawing processes can have adverse effects on system performance. In this paper we develop a method for obtaining models of the drawing process that lend themselves. to the application of optimal control of fiber diameter nonuniformities. The method presented here consists of using the basic conservation laws of mass, momentum, and energy to construct state space models of the drawing process that incorporate all the relevant variables of the system in a multiple-input/multiple-output framework. An LQG optimal controller is synthesized to illustrate the applicability of the state space model. C1 Sandia Natl Labs, Fluid Thermal Modeling Dept, Livermore, CA 94550 USA. RP Sandia Natl Labs, Fluid Thermal Modeling Dept, Livermore, CA 94550 USA. EM swtchik@sandia.gov; kokmeng.lee@me.gatech.edu; zhizhou@ofsoptics.com 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 SN 2159-6255 BN 0-7803-7759-1 J9 IEEE ASME INT C ADV PY 2003 BP 856 EP 861 PG 6 WC Robotics SC Robotics GA BX53V UT WOS:000185624100144 ER PT B AU Heffelfinger, GS AF Heffelfinger, GS GP IEEE COMPUTER SOCIETY TI An overview of the Sandia national laboratories Genomes to life project, "Carbon sequestration in synechococcus sp.: From molecular machines to hierarchical modeling" SO PROCEEDINGS OF THE 2003 IEEE BIOINFORMATICS CONFERENCE LA English DT Proceedings Paper CT 2nd International Computational Systems Bioinformatics Conference CY AUG 11-14, 2003 CL STANFORD UNIV, STANFORD, CA SP IEEE Comp Soc TC Bioinformat, ACM HO STANFORD UNIV C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Heffelfinger, GS (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA BN 0-7695-2000-6 PY 2003 BP 34 EP 34 DI 10.1109/CSB.2003.1227300 PG 1 WC Biology; Biotechnology & Applied Microbiology; Computer Science, Artificial Intelligence; Computer Science, Interdisciplinary Applications SC Life Sciences & Biomedicine - Other Topics; Biotechnology & Applied Microbiology; Computer Science GA BY34W UT WOS:000188997700014 ER PT B AU Yu, GX Ostrouchov, G Geist, A Samatova, NF AF Yu, GX Ostrouchov, G Geist, A Samatova, NF GP IEEE COMPUTER SOCIETY TI An SVM-based algorithm for identification of photosynthesis-speciric genome features SO PROCEEDINGS OF THE 2003 IEEE BIOINFORMATICS CONFERENCE LA English DT Proceedings Paper CT 2nd International Computational Systems Bioinformatics Conference CY AUG 11-14, 2003 CL STANFORD UNIV, STANFORD, CA SP IEEE Comp Soc TC Bioinformat, ACM HO STANFORD UNIV DE key genome features; oxygenic photosynthetic process; genome comparative analysis; support vector machines ID MICROBIAL GENOMES; PROTEIN FAMILIES; EVOLUTION; SEQUENCE; DATABASE AB This paper presents a novel algorithm for identification and functional characterization of "key" genome features responsible for a particular biochemical process of interest. The central idea is that individual genome features are identified as "key" features if the discrimination accuracy between two classes of genomes with respect to a given biochemical process is sufficiently affected by the inclusion or exclusion of these features. In this paper, genome features are defined by high resolution gene functions. The discrimination procedure utilizes the Support Vector Machine classification technique. The application to the oxygenic photosynthetic process resulted in 126 highly confident candidate genome features. While many of these features are well-known components in the oxygenic photosynthetic process, others are completely unknown, even including some hypothetical proteins. It is obvious that our algorithm is capable of discovering features related to a targeted biochemical process. C1 Oak Ridge Natl Lab, Computat Biol Grp, Div Math & Comp Sci, Oak Ridge, TN 37830 USA. RP Yu, GX (reprint author), Oak Ridge Natl Lab, Computat Biol Grp, Div Math & Comp Sci, POB 2008, Oak Ridge, TN 37830 USA. NR 22 TC 2 Z9 3 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 BN 0-7695-2000-6 PY 2003 BP 235 EP 243 PG 9 WC Biology; Biotechnology & Applied Microbiology; Computer Science, Artificial Intelligence; Computer Science, Interdisciplinary Applications SC Life Sciences & Biomedicine - Other Topics; Biotechnology & Applied Microbiology; Computer Science GA BY34W UT WOS:000188997700037 ER PT B AU Fridman, T Day, R Razumovskaya, J Xu, D Gorin, A AF Fridman, T Day, R Razumovskaya, J Xu, D Gorin, A GP IEEE COMPUTER SOCIETY TI Probability profiles - Novel approach in tandem mass spectrometry de novo sequencing SO PROCEEDINGS OF THE 2003 IEEE BIOINFORMATICS CONFERENCE LA English DT Proceedings Paper CT 2nd International Computational Systems Bioinformatics Conference CY AUG 11-14, 2003 CL STANFORD UNIV, STANFORD, CA SP IEEE Comp Soc TC Bioinformat, ACM HO STANFORD UNIV AB A novel method is proposed for deciphering experimental tandem mass spectra A large database of previously resolved peptide spectra was used to determine "neighborhood patterns" for each peak category: C- or N-terminus ions, their dehydrated fragments, etc. The established patterns are applied to assign probabilities for new spectra peaks to fit into these categories. A few peaks often could be identified with a fair confidence creating strong "anchor points" for De Novo algorithm assembling sequence subgraphs. Our approach is utilizing all informational content of a given MS experimental data set, including peak intensities, weak and noisy peaks, and unusual fragments. We also discuss ways to provide learning features in our method: adjustments for a specific MS device and user initiated changes in the list of considered peak identities. C1 Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37830 USA. RP Gorin, A (reprint author), Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37830 USA. RI Gorin, Andrey/B-1545-2014 NR 3 TC 0 Z9 0 U1 0 U2 1 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA BN 0-7695-2000-6 PY 2003 BP 415 EP 418 DI 10.1109/CSB.2003.1227351 PG 4 WC Biology; Biotechnology & Applied Microbiology; Computer Science, Artificial Intelligence; Computer Science, Interdisciplinary Applications SC Life Sciences & Biomedicine - Other Topics; Biotechnology & Applied Microbiology; Computer Science GA BY34W UT WOS:000188997700065 ER PT B AU Stephan, EG Chin, G Klicker, KR Corrigan, AL Sofia, HJ AF Stephan, EG Chin, G Klicker, KR Corrigan, AL Sofia, HJ GP IEEE COMPUTER SOCIETY TI A symbolic logic strategy for mapping biological concepts in the HERBE prototype SO PROCEEDINGS OF THE 2003 IEEE BIOINFORMATICS CONFERENCE LA English DT Proceedings Paper CT 2nd International Computational Systems Bioinformatics Conference CY AUG 11-14, 2003 CL STANFORD UNIV, STANFORD, CA SP IEEE Comp Soc TC Bioinformat, ACM HO STANFORD UNIV AB More powerful database approaches are needed to support biologists in the efficient use of complex, large scale, and rapidly changing systems biology data. We are engaged in research to advance database strategies for capturing, managing, computing, and searching biological concepts in ways that are presently not possible. The Heuristic Entity Relationship Building Environment (HERBE) project is developing mechanisms to automate the translation of concepts into a computable form. HERBE features an open visual environment to collect diverse, complex data and, construct models graphically allowing users to apply their own symbolic logic. As data are entered, HERBE captures the data, then integrates and heuristically interprets underlying concepts into a computable form using a multitiered data management infrastructure. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Stephan, EG (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA. OI Stephan, Eric/0000-0002-8155-6806 NR 1 TC 1 Z9 1 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 BN 0-7695-2000-6 PY 2003 BP 419 EP 420 DI 10.1109/CSB.2003.1227352 PG 2 WC Biology; Biotechnology & Applied Microbiology; Computer Science, Artificial Intelligence; Computer Science, Interdisciplinary Applications SC Life Sciences & Biomedicine - Other Topics; Biotechnology & Applied Microbiology; Computer Science GA BY34W UT WOS:000188997700066 ER PT B AU Razumovskaya, J Olman, V Xu, D Uberbacher, E Verbermoes, N Xu, Y AF Razumovskaya, J Olman, V Xu, D Uberbacher, E Verbermoes, N Xu, Y GP IEEE COMPUTER SOCIETY TI A computational method for assessing peptide-identification reliability in tandem mass spectrometry analysis with SEQUEST SO PROCEEDINGS OF THE 2003 IEEE BIOINFORMATICS CONFERENCE LA English DT Proceedings Paper CT 2nd International Computational Systems Bioinformatics Conference CY AUG 11-14, 2003 CL STANFORD UNIV, STANFORD, CA SP IEEE Comp Soc TC Bioinformat, ACM HO STANFORD UNIV C1 Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37830 USA. RP Razumovskaya, J (reprint author), Oak Ridge Natl Lab, Div Life Sci, Oak Ridge, TN 37830 USA. NR 0 TC 0 Z9 0 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 BN 0-7695-2000-6 PY 2003 BP 421 EP 421 DI 10.1109/CSB.2003.1227353 PG 1 WC Biology; Biotechnology & Applied Microbiology; Computer Science, Artificial Intelligence; Computer Science, Interdisciplinary Applications SC Life Sciences & Biomedicine - Other Topics; Biotechnology & Applied Microbiology; Computer Science GA BY34W UT WOS:000188997700067 ER PT B AU Wilczynski, B Hvidsten, T Kryshtafovych, A Stubbs, L Komorowski, J Fidelis, K AF Wilczynski, B Hvidsten, T Kryshtafovych, A Stubbs, L Komorowski, J Fidelis, K GP IEEE COMPUTER SOCIETY TI A rule-based framework for gene regulation pathways discovery SO PROCEEDINGS OF THE 2003 IEEE BIOINFORMATICS CONFERENCE LA English DT Proceedings Paper CT 2nd International Computational Systems Bioinformatics Conference CY AUG 11-14, 2003 CL STANFORD UNIV, STANFORD, CA SP IEEE Comp Soc TC Bioinformat, ACM HO STANFORD UNIV AB We present a novel approach for rule discovery in the area of gene regulation. The method is based on supervised machine learning and is designed to reveal relationships between transcription factors and gene expression. As a representation of the gene regulatory circuit we have chosen a special form of the IF-THEN rules associating predefined features, taken here as a generalized idea of transcription factor binding sites in gene regulatory regions, with the corresponding gene expression profiles. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Wilczynski, B (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RI Wilczynski, Bartek/A-5710-2009; OI Wilczynski, Bartek/0000-0002-8134-0589; Stubbs, Lisa/0000-0002-9556-1972 NR 6 TC 0 Z9 0 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 BN 0-7695-2000-6 PY 2003 BP 435 EP 436 DI 10.1109/CSB.2003.1227361 PG 2 WC Biology; Biotechnology & Applied Microbiology; Computer Science, Artificial Intelligence; Computer Science, Interdisciplinary Applications SC Life Sciences & Biomedicine - Other Topics; Biotechnology & Applied Microbiology; Computer Science GA BY34W UT WOS:000188997700074 ER PT B AU Olman, V Xu, D Xu, Y AF Olman, V Xu, D Xu, Y GP IEEE COMPUTER SOCIETY TI CUBIC: Identification of regulatory binding sites through data clustering SO PROCEEDINGS OF THE 2003 IEEE BIOINFORMATICS CONFERENCE LA English DT Proceedings Paper CT 2nd International Computational Systems Bioinformatics Conference CY AUG 11-14, 2003 CL STANFORD UNIV, STANFORD, CA SP IEEE Comp Soc TC Bioinformat, ACM HO STANFORD UNIV C1 Oak Ridge Natl Lab, Prot Informat Grp, Div Life Sci, Oak Ridge, TN 37831 USA. RP Olman, V (reprint author), Oak Ridge Natl Lab, Prot Informat Grp, Div Life Sci, Oak Ridge, TN 37831 USA. NR 0 TC 0 Z9 0 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 BN 0-7695-2000-6 PY 2003 BP 448 EP 448 DI 10.1109/CSB.2003.1227367 PG 1 WC Biology; Biotechnology & Applied Microbiology; Computer Science, Artificial Intelligence; Computer Science, Interdisciplinary Applications SC Life Sciences & Biomedicine - Other Topics; Biotechnology & Applied Microbiology; Computer Science GA BY34W UT WOS:000188997700080 ER PT B AU Kryshtafovych, A Hvidsten, TR Komorowski, J Fidelis, K AF Kryshtafovych, A Hvidsten, TR Komorowski, J Fidelis, K GP IEEE COMPUTER SOCIETY TI Fold recognition using sequence fingerprints of protein local substructures SO PROCEEDINGS OF THE 2003 IEEE BIOINFORMATICS CONFERENCE LA English DT Proceedings Paper CT 2nd International Computational Systems Bioinformatics Conference CY AUG 11-14, 2003 CL STANFORD UNIV, STANFORD, CA SP IEEE Comp Soc TC Bioinformat, ACM HO STANFORD UNIV ID DATABASE AB A protein local substructure (descriptor) is a set of several short non-overlapping fragments of the polypeptide chain. Each substructure describes local environment of a particular residue and includes only those segments of the main chain that are located in the proximity of that residue. Similar descriptors from the representative set of proteins were analyzed to reveal links between the substructures and the sequences of their segments. Using the detected sequence-based fingerprints, specific geometrical conformations are assigned to new sequences. The ability of the approach to recognize correct SCOP folds was tested on 273 sequences from the 49 most popular folds. Good predictions were obtained in 85% of cases. No performance drop was observed with decreasing sequence similarity between target sequences and sequences from the training set of proteins. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Kryshtafovych, A (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 6 TC 0 Z9 0 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 BN 0-7695-2000-6 PY 2003 BP 517 EP 518 DI 10.1109/CSB.2003.1227393 PG 2 WC Biology; Biotechnology & Applied Microbiology; Computer Science, Artificial Intelligence; Computer Science, Interdisciplinary Applications SC Life Sciences & Biomedicine - Other Topics; Biotechnology & Applied Microbiology; Computer Science GA BY34W UT WOS:000188997700106 ER PT B AU Ding, C Peng, HC AF Ding, C Peng, HC GP IEEE COMPUTER SOCIETY TI Minimum redundancy feature selection from microarray gene expression data SO PROCEEDINGS OF THE 2003 IEEE BIOINFORMATICS CONFERENCE LA English DT Proceedings Paper CT 2nd International Computational Systems Bioinformatics Conference CY AUG 11-14, 2003 CL STANFORD UNIV, STANFORD, CA SP IEEE Comp Soc TC Bioinformat, ACM HO STANFORD UNIV ID SUPPORT VECTOR MACHINES; CANCER; PROFILES; CLASSIFICATION; PATTERNS; WRAPPERS AB Selecting a small subset of genes out of the thousands of genes in microarray data is important for accurate classification of phenotypes. Widely used methods typically rank genes according to their differential expressions among phenotypes and pick the top-ranked genes We observe that feature sets so obtained have certain redundancy and study methods to minimize it. Feature sets obtained through the minimum redundancy -maximum relevance framework represent broader spectrum of characteristics of phenotypes than those obtained through standard ranking methods; they are more robust, generalize well to unseen data, and lead to significantly improved classifications in extensive experiments on 5 gene expressions data sets. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, NERSC Div, Berkeley, CA 94720 USA. RP Ding, C (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, NERSC Div, Berkeley, CA 94720 USA. RI Peng, Hanchuan/A-1798-2011 NR 28 TC 143 Z9 150 U1 2 U2 18 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA BN 0-7695-2000-6 PY 2003 BP 523 EP 528 DI 10.1109/CSB.2003.1227396 PG 6 WC Biology; Biotechnology & Applied Microbiology; Computer Science, Artificial Intelligence; Computer Science, Interdisciplinary Applications SC Life Sciences & Biomedicine - Other Topics; Biotechnology & Applied Microbiology; Computer Science GA BY34W UT WOS:000188997700109 ER PT B AU Schiek, RL May, EE AF Schiek, RL May, EE GP IEEE COMPUTER SOCIETY TI Development of a massively-parallel, biological circuit simulator SO PROCEEDINGS OF THE 2003 IEEE BIOINFORMATICS CONFERENCE LA English DT Proceedings Paper CT 2nd International Computational Systems Bioinformatics Conference CY AUG 11-14, 2003 CL STANFORD UNIV, STANFORD, CA SP IEEE Comp Soc TC Bioinformat, ACM HO STANFORD UNIV AB Genetic expression and control pathways can be successfully modeled as electrical circuits. Given the vast quantity of genomic data, very large and complex genetic circuits can be constructed. To tackle such problems, the massively-parallel, electronic circuit simulator, Xyce(TM) is being adapted to address biological problems. Unique to this biocircuit simulator is the ability to simulate not just one or a set of genetic circuits in a cell, but many cells and their internal circuits interacting through a common environment. Currently, electric circuit analogs for common biological and chemical machinery have been created Using such analogs, one can construct expression, regulation and reaction networks. Individual species can be connected to other networks or cells via non-diffusive or diffusive channels (i.e. regions where species diffusion limits mass transport). Within any cell, a hierarchy of networks may exist operating at different time-scales to represent different aspects of cellular processes. Though under development, this simulator can model interesting biological and chemical systems. Prokaryotic genetic and metabolic regulatory circuits have been constructed and their interactions simulated for Escherichia coli's tryptophan biosynthesis pathway., Additionally, groups of cells each containing an internal reaction network and communicating via a diffusion limited environment can produce periodic concentration waves. Thus, this biological circuit simulator has the potential to explore large, complex systems and environmentally coupled problems. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Schiek, RL (reprint author), Sandia Natl Labs, POB 5800,MS 0316, Albuquerque, NM 87185 USA. RI Schiek, Richard/A-9192-2011 NR 6 TC 7 Z9 7 U1 0 U2 1 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA BN 0-7695-2000-6 PY 2003 BP 620 EP 622 DI 10.1109/CSB.2003.1227426 PG 3 WC Biology; Biotechnology & Applied Microbiology; Computer Science, Artificial Intelligence; Computer Science, Interdisciplinary Applications SC Life Sciences & Biomedicine - Other Topics; Biotechnology & Applied Microbiology; Computer Science GA BY34W UT WOS:000188997700139 ER PT B AU Su, Z Dam, P Chen, X Olman, V Jiang, T Palenik, B Xu, Y AF Su, Z Dam, P Chen, X Olman, V Jiang, T Palenik, B Xu, Y GP IEEE COMPUTER SOCIETY TI Computational inference of regulatory pathways in microbes An application to phosphorus assimilation pathways in synechococcus WH8102 SO PROCEEDINGS OF THE 2003 IEEE BIOINFORMATICS CONFERENCE LA English DT Proceedings Paper CT 2nd International Computational Systems Bioinformatics Conference CY AUG 11-14, 2003 CL STANFORD UNIV, STANFORD, CA SP IEEE Comp Soc TC Bioinformat, ACM HO STANFORD UNIV C1 Oak Ridge Natl Lab, Div Life Sci, Prot Informat Grp, Oak Ridge, TN 37831 USA. RP Su, Z (reprint author), Oak Ridge Natl Lab, Div Life Sci, Prot Informat Grp, Oak Ridge, TN 37831 USA. NR 0 TC 0 Z9 0 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 BN 0-7695-2000-6 PY 2003 BP 631 EP 631 PG 1 WC Biology; Biotechnology & Applied Microbiology; Computer Science, Artificial Intelligence; Computer Science, Interdisciplinary Applications SC Life Sciences & Biomedicine - Other Topics; Biotechnology & Applied Microbiology; Computer Science GA BY34W UT WOS:000188997700142 ER PT B AU Vo-Dinh, T Griffin, GD Wintenberg, AL Stokes, DL Mobley, J Askari, M Maples, R AF Vo-Dinh, T Griffin, GD Wintenberg, AL Stokes, DL Mobley, J Askari, M Maples, R GP IEEE IEEE IEEE TI Advanced biochip: Principle and applications in medical diagnostics and pathogen detection SO PROCEEDINGS OF THE 2003 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS, VOL III: GENERAL & NONLINEAR CIRCUITS AND SYSTEMS LA English DT Proceedings Paper CT IEEE International Symposium on Circuits and Systems CY MAY 25-28, 2003 CL BANGKOK, THAILAND SP IEEE Circuits & Syst Soc, Mahanakorn Univ Technol ID ANTIBODY BIOCHIP AB An important factor in medical diagnostics is rapid, selective, and sensitive detection of biochemical substances (proteins, metabolites, nucleic acids), biological species or living systems (bacteria, virus or related components) at trace levels in biological samples (e.g., tissues, blood and other bodily fluids). This manuscript provides an overview of the operating principle and application of an integrated multi-functional biochip based on integrated circuit complementary metal oxide semiconductor (CMOS) sensor array for use in medical diagnostics and pathogen, detection. The usefulness and potential of the biochip as a rapid diagnostic tool at the physician's office and as a practical, inexpensive screening tool for pathogens under field conditions are discussed. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Vo-Dinh, T (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. NR 7 TC 0 Z9 0 U1 0 U2 9 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7761-3 PY 2003 BP 622 EP 625 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BX26P UT WOS:000184781800157 ER PT B AU Dixon, WE Fang, Y Dawson, DM Chen, J AF Dixon, WE Fang, Y Dawson, DM Chen, J GP IEEE IEEE TI Adaptive range identification for exponential visual servo tracking SO PROCEEDINGS OF THE 2003 IEEE INTERNATIONAL SYMPOSIUM ON INTELLIGENT CONTROL LA English DT Proceedings Paper CT IEEE International Symposium on Intelligent Control CY OCT 05-08, 2003 CL HOUSTON, TX SP IEEE Contrl Syst Soc ID STABILITY ANALYSIS; SYSTEMS; SCHEME AB A projective homography is developed by relating feature points extracted from images taken at the reference and current camera position/orientation. By decomposing the homography into translation and rotation components, geometric relationships are determined that facilitate the construction of an adaptive strategy to identify unknown depth information. The development of the parameter identification strategy provides a mechanism to develop a position-based and a hybrid position/image-based visual servo controller for a trajectory tracking control problem. By using information obtained from the parameter identification strategy, both visual servoing controllers are proven to yield exponential tracking. C1 Oak Ridge Natl Lab, Engn Sci & Tech Div, Oak Ridge, TN 37831 USA. RP Oak Ridge Natl Lab, Engn Sci & Tech Div, POB 2008, Oak Ridge, TN 37831 USA. EM dixonwe@ornl.gov; yfang@ces.clemson.edu; ddawson@ces.clemson.edu; jianc@ces.clemson.edu NR 17 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7891-1 PY 2003 BP 46 EP 51 PG 6 WC Automation & Control Systems; Computer Science, Artificial Intelligence SC Automation & Control Systems; Computer Science GA BY23E UT WOS:000188359900007 ER PT B AU Bruemmer, DJ Anderson, MO Marble, JL Dudenhoeffer, DD Few, DA McKay, MD AF Bruemmer, DJ Anderson, MO Marble, JL Dudenhoeffer, DD Few, DA McKay, MD GP IEEE IEEE TI Intelligent autonomy for remote characterization of hazardous environments SO PROCEEDINGS OF THE 2003 IEEE INTERNATIONAL SYMPOSIUM ON INTELLIGENT CONTROL LA English DT Proceedings Paper CT IEEE International Symposium on Intelligent Control CY OCT 05-08, 2003 CL HOUSTON, TX SP IEEE Contrl Syst Soc AB Remote characterization of high radiation environments is a pressing application area where robots have the potential to provide benefits in terms of time, cost, safety and quality of data. However, the ability to design robots that can be used effectively has proven to be no easy task. In 2001, the Idaho National Engineering and Environmental Laboratory (INEEL) successfully deployed a teleoperated robotic system coupled with a Gamma Locating and Isotopic Identification Device (RGL&IID) to characterize an area that had been closed to human entry for many years. This paper examines the limitations to the control strategy used and discusses how current efforts at the INEEL are developing intelligent controls that can actively mediate between the human and the robotic elements of the system. The resulting, mixed-initiative control architecture allows the user to shift the level of robot initiative throughout the task as needed. This system offers the opportunity for the human and robot to become a team where each can support the capabilities and limitations of the other. C1 Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA. RP Bruemmer, DJ (reprint author), Idaho Natl Engn Lab, Idaho Falls, ID 83415 USA. 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 0-7803-7891-1 PY 2003 BP 750 EP 754 PG 5 WC Automation & Control Systems; Computer Science, Artificial Intelligence SC Automation & Control Systems; Computer Science GA BY23E UT WOS:000188359900128 ER PT B AU Fitch, JP AF Fitch, JP GP IEEE TI Plenary: An indexed modeling and experimental strategy for biosignatures of pathogen and host SO PROCEEDINGS OF THE 2003 IEEE WORKSHOP ON STATISTICAL SIGNAL PROCESSING LA English DT Proceedings Paper CT 12th IEEE Workshop on Statistical Signal Processing CY SEP 28-OCT 01, 2003 CL St Louis, MO SP IEEE Signal Proc Soc, DARPA, USAF Res Lab, Off Naval Res, Natl Sci Fdn C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Fitch, JP (reprint author), Lawrence Livermore Natl Lab, POB 5508, Livermore, CA 94551 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 0-7803-7997-7 PY 2003 BP 5 EP 5 PG 1 WC Computer Science, Information Systems; Mathematics, Interdisciplinary Applications; Imaging Science & Photographic Technology; Telecommunications SC Computer Science; Mathematics; Imaging Science & Photographic Technology; Telecommunications GA BY73T UT WOS:000189451000004 ER PT B AU Mosher, JC Baillet, S Leahy, RM AF Mosher, JC Baillet, S Leahy, RM GP IEEE TI Equivalence of linear approaches in bioelectromagnetic inverse solutions SO PROCEEDINGS OF THE 2003 IEEE WORKSHOP ON STATISTICAL SIGNAL PROCESSING LA English DT Proceedings Paper CT 12th IEEE Workshop on Statistical Signal Processing CY SEP 28-OCT 01, 2003 CL St Louis, MO SP IEEE Signal Proc Soc, DARPA, USAF Res Lab, Off Naval Res, Natl Sci Fdn ID MEG; LOCALIZATION; BRAIN; EEG AB Several different techniques have appeared in the magnetoencephalography (MEG). literature for solving the ambiguous inverse problem. We show that if the same second order statistics are uniformly applied in each case, then the resulting solutions are the same. Additionally, for the common assumption of independent sources, then the "noise significance" measure emphasises the need to select the data and noise covariance statistics, not the specific values of source statistics. Thus such algorithms as "dynamic SPM" and "synthetic aperture magnetoencephalography" are theoretically equivalent and differ in practice by practical matters of specification or estimation of data covariances. C1 Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Mosher, JC (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87544 USA. NR 13 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7997-7 PY 2003 BP 294 EP 297 PG 4 WC Computer Science, Information Systems; Mathematics, Interdisciplinary Applications; Imaging Science & Photographic Technology; Telecommunications SC Computer Science; Mathematics; Imaging Science & Photographic Technology; Telecommunications GA BY73T UT WOS:000189451000084 ER PT B AU Holtkamp, N AF Holtkamp, N BE Chew, J Lucas, P Webber, S TI Status of the SNS* project SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The Spallation Neutron Source (SNS) [ 1,2] is a second-generation pulsed neutron source under construction at Oak Ridge National Laboratory. SNS is funded by the U.S. Department of Energy's Office of Basic Energy Sciences and is dedicated to the study of the structure and dynamics of materials by neutron scattering. A partnership of six national laboratories (ANL, BNL, JLab, LANL, LBNL, and ORNL) is responsible for the design and construction of the various subsystems. The facility will begin operation in 2006 and will deliver a 1.0-GeV, 1.4-MW proton beam with a pulse length of approximately 700 nanoseconds to a liquid mercury target. The expertise of the different laboratories has been exploited to enhance the delivered beam power by almost an order of magnitude compared to existing neutron facilities. The achievable neutron-scattering performance will exceed present sources by more than a factor of 20 to 100. To achieve such a big step, the subsystems require substantial improvements compared with existing accelerators. The challenges, the status of the project, and potential upgrades are presented here. C1 ORNL, Oak Ridge, TN 37820 USA. RP Holtkamp, N (reprint author), ORNL, Oak Ridge, TN 37820 USA. NR 3 TC 4 Z9 4 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 11 EP 15 DI 10.1109/PAC.2003.1288828 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600003 ER PT B AU Lebedev, V AF Lebedev, V BE Chew, J Lucas, P Webber, S TI Beam physics at Tevatron complex SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The challenge of achieving the Tevatron Run II luminosity goal of 3(.)10(32) cm(-2)s(-1) requires high level of engineering and machine operation, good and reliable diagnostics, and clear understanding of the underlying accelerator physics. Recent history demonstrated steady increase of the Tevatron luminosity, which was supported by each of the three listed above items. This report reviews major developments in the accelerator physics, which contributed in the Run II luminosity growth. Present limitations of the luminosity and projections of further luminosity growth are also discussed. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Lebedev, V (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 14 TC 2 Z9 2 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 29 EP 33 DI 10.1109/PAC.2003.1288832 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600007 ER PT B AU Sen, T AF Sen, T BE Chew, J Lucas, P Webber, S TI New aspects of beam-beam phenomena in hadron colliders SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Long-range beam-beam interactions in Run II at the Tevatron are the dominant sources of beam loss and lifetime limitations of anti-protons, especially at injection energy. The main focus of the talk will be observations of the long-range effects during Run II and theoretical understanding of these effects. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Sen, T (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 3 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 34 EP 38 DI 10.1109/PAC.2003.1288833 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600008 ER PT B AU Ben-Zvi, I Brennan, J Burrill, A Calaga, R Chang, XY Citver, G Hahn, H Harrison, M Hershcovitch, A Jain, A Montag, C Fedotov, A Kewisch, J Mackay, W McIntyre, G Pate, D Peggs, S Rank, J Roser, T Scaduto, J Srinivasan-Rao, T Trboievic, D Wang, D Zaltsman, A Zhao, YX AF Ben-Zvi, I Brennan, J Burrill, A Calaga, R Chang, XY Citver, G Hahn, H Harrison, M Hershcovitch, A Jain, A Montag, C Fedotov, A Kewisch, J Mackay, W McIntyre, G Pate, D Peggs, S Rank, J Roser, T Scaduto, J Srinivasan-Rao, T Trboievic, D Wang, D Zaltsman, A Zhao, YX BE Chew, J Lucas, P Webber, S TI R&D towards cooling of the RHIC collider SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB We introduce the R&D program for electron-cooling of the Relativistic Heavy Ion Collider (RHIC). This electron cooler is designed to cool 100 GeV/nucleon bunched-beam ion collider at storage energy using 54 MeV electrons. The electron source will be an RF photocathode gun. The accelerator will be a superconducting energy recovery linac. The frequency of the accelerator is set at 703.75 MHz. The maximum bunch frequency is 28.15 MHz, with bunch charge of 10 nC. The R&D program has the following components: The photoinjector, the superconducting linac, start-to-end beam dynamics with magnetized electrons, electron cooling calculations and development of a large superconducting solenoid. C1 Brookhaven Natl Lab, C AD, Upton, NY 11973 USA. RP Ben-Zvi, I (reprint author), Brookhaven Natl Lab, C AD, Upton, NY 11973 USA. NR 8 TC 10 Z9 10 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 39 EP 41 DI 10.1109/PAC.2003.1288834 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600009 ER PT B AU Steimel, J Lebedev, V Gonin, I Khabibouline, T Reid, J Romanov, G Shiltsev, V Tollestrup, A AF Steimel, J Lebedev, V Gonin, I Khabibouline, T Reid, J Romanov, G Shiltsev, V Tollestrup, A BE Chew, J Lucas, P Webber, S TI Effects of RF noise on longitudinal emittance growth in the Tevatron SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Phase and amplitude noises in the Tevatron RF system and the intrabeam scattering (IBS) produce longitudinal emittance growth with consecutive particle loss from the RF buckets. That causes a decrease of the luminosity and an increase of the background in particle detectors during the store. The report presents experimental measurements of RF system noise and the effect on the longitudinal emittance growth. There is a satisfactory agreement between measured noise spectral densities and observed emittance growth. For high bunch intensities, IBS plays an important role and has been taken into account. The sources of noises and plans for further system improvements are discussed. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Steimel, J (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 2 TC 6 Z9 6 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 48 EP 50 DI 10.1109/PAC.2003.1288837 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600012 ER PT B AU Huang, H Ahrens, L Alessi, JG Alekseev, I Bai, M Beebe-Wang, J Brarvar, S Brennan, M Brown, KA Bunce, G Drees, A Fisher, W Gardner, C Glenn, W Igo, G Jinnochi, O Luccio, AU MacKay, W Montag, C Pilat, F Ptytsin, V Roser, T Satogata, T Spinka, H Svirida, D Tepikian, S Trbojevic, D Tsoupas, N Underwood, D van Zeijts, J Wood, J Zelenski, A Zeno, K Zhang, SY AF Huang, H Ahrens, L Alessi, JG Alekseev, I Bai, M Beebe-Wang, J Brarvar, S Brennan, M Brown, KA Bunce, G Drees, A Fisher, W Gardner, C Glenn, W Igo, G Jinnochi, O Luccio, AU MacKay, W Montag, C Pilat, F Ptytsin, V Roser, T Satogata, T Spinka, H Svirida, D Tepikian, S Trbojevic, D Tsoupas, N Underwood, D van Zeijts, J Wood, J Zelenski, A Zeno, K Zhang, SY BE Chew, J Lucas, P Webber, S TI Polarized proton acceleration at the Brookhaven AGS and RHIC SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Polarized proton beam has been accelerated and stored at 100GeV in Relativistic Heavy Ion Collider (RHIC) to study spin effects in the hadronic reactions. The essential equipment includes four Siberian snakes and eight spin rotators in two RHIC rings, a partial snake in the AGS, fast relative polarimeters, and ac dipoles in the AGS and RHIC. This paper summarizes the performance of RHIC as a polarized proton collider and of AGS as the injector to RHIC. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Huang, H (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. RI Alekseev, Igor/J-8070-2014; Svirida, Dmitry/R-4909-2016 OI Alekseev, Igor/0000-0003-3358-9635; 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 BN 0-7803-7738-9 PY 2003 BP 51 EP 53 DI 10.1109/PAC.2003.1288838 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600013 ER PT B AU Young, L AF Young, L BE Chew, J Lucas, P Webber, S TI 25 years of technical advances in RFQ accelerators SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The radio frequency quadrupole (RFQ) accelerator began as 'The ion linear accelerator with space-uniform strong focusing" conceived by I.M. Kapchinskii and V. A. Teplyakov[1]. In 1979, R. H. Stokes, K. R. Crandall, J. E. Stovall and D. A. Swenson[2] gave this concept the name RFQ. Shortly after Valentine's Day in 1980 a telegram was sent to I.M. Kapchinskii. It stated, "The RFQ is alive and well at the Los Alamos Scientific Laboratory". Thus begins a very informative story of the early history of the development of the RFQ[3]. By 1983, at least 15 laboratories throughout the world were working on various RFQ designs. H. Klein wrote an excellent review of a number of different RFQ structures[4]. In the early years, there were many types of geometry considered for the RFQ, but only a few types have survived. The two cavity geometries now used in almost all RFQs are the 4-vane and 4-rod structures. The 4-vane structure is the most popular because its operating frequency range (80 to similar to500 MHz) is suitable for light ions. Heavy ions require low frequencies (below 200 MHz). Because the 4-rod structure has smaller transverse dimensions than a 4-vane RFQ at the same frequency, the 4-rod RFQ is often preferred for these applications. This paper will describe how the RFQ accelerates and focuses the beam. The paper also discusses some of the important technical advances in designing and building RFQs. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Young, L (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 38 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 60 EP 64 DI 10.1109/PAC.2003.1288841 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600016 ER PT B AU Aleksandrov, A AF Aleksandrov, A BE Chew, J Lucas, P Webber, S TI Commissioning of the spallation neutron source front end systems SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The Front-End (FE) for the Spallation Neutron Source (SNS) accelerator system is a 2.5-MeV linac injector consisting of the following major subsystems, the rf-driven H- ion source, the electrostatic Low Energy Beam Transport line, a 402.5 MHz RFQ, the Medium Energy Beam Transport line, a beam chopper system and a suite of diagnostic devices. After construction and initial commissioning at LBNL the Front End was shipped to Oak Ridge in the summer of 2002, installed at the SNS site and re-commissioned. This paper provides an overview of the major design features and the experimental results obtained during the final commissioning of the Front End Systems. Performance of the various subsystems will be described, and the final beam output performance will be summarized. C1 Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37830 USA. RP Aleksandrov, A (reprint author), Oak Ridge Natl Lab, Spallat Neutron Source, POB 2008, Oak Ridge, TN 37830 USA. NR 8 TC 7 Z9 8 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 65 EP 69 DI 10.1109/PAC.2003.1288842 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600017 ER PT B AU Grote, DP Westenskow, G Kwan, J AF Grote, DP Westenskow, G Kwan, J BE Chew, J Lucas, P Webber, S TI Heavy ion fusion sources SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB In Heavy-Fusion and in other applications, there is a need for high brightness sources with both high current and low emittance. The traditional design with a single monolithic source, while very successful, has significant constraints on it when going to higher currents. With the Child-Langmuir current-density limit, geometric aberration limits, and voltage break-down limits, the area of the source becomes a high power of the current, Asimilar toI(boolean AND)8/3. We are examining a multi-beamlet source, avoiding the constraints by having many beamlets each with low current and small area. The beamlets are created and initially accelerated separately and then merged to form a single beam. This design offers a number of potential advantages over a monolithic source, such as a smaller transverse footprint, more control over the shaping and aiming of the beam, and more flexibility in the choice of ion sources. A potential drawback, however, is the emittance that results from the merging of the beamlets. We have designed injectors using simulation that have acceptably low emittance and are beginning to examine them experimentally. C1 LLNL, Livermore, CA USA. RP Grote, DP (reprint author), LLNL, Livermore, CA 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 BN 0-7803-7738-9 PY 2003 BP 70 EP 72 DI 10.1109/PAC.2003.1288843 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600018 ER PT B AU Rouleau, G Chacon-Golcher, E Geros, E Jacobson, EG Meyer, BJ Prichard, BA Sherman, J Stelzer, JE Stevens, RR AF Rouleau, G Chacon-Golcher, E Geros, E Jacobson, EG Meyer, BJ Prichard, BA Sherman, J Stelzer, JE Stevens, RR BE Chew, J Lucas, P Webber, S TI H- surface converter source development at Los Alamos SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Production of H- ions by the surface conversion process is being pursued at the Los Alamos Neutron Science Center (LANSCE) as part of an upgrade project to provide higher currents and enhanced flexibility for injecting a 800 MeV H- beam into the proton storage ring (PSR). An eventual goal of 40-mA H- current at 80 keV beam energy with 0.13 pimm-mrad (1rms normalized) emittance at 12% duty factor (120 Hz, 1ms) is desired. To attain this goal, two types of surface converter sources are being investigated in which H- ions are extracted either radially or axially through a line-cusp magnetic field. The radial source produces 18 mA H- in a 28-day run cycle for LANSCE production while the axial source has been developed to the desired 40 mA current. However, an emittance growth of factor 2-3 accompanied the increased axial source current. The axial source development program includes electron suppression, increased beam current, and 80-keV beam emittance measurements. The current understanding of the emittance growth mechanism will be discussed. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Rouleau, G (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 14 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 73 EP 75 DI 10.1109/PAC.2003.1288844 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600019 ER PT B AU Leitner, D Abbott, SR Dwinell, RD Leitner, M Taylor, C Lyneis, CM AF Leitner, D Abbott, SR Dwinell, RD Leitner, M Taylor, C Lyneis, CM BE Chew, J Lucas, P Webber, S TI Commissioning of the superconducting ECR ion source VENUS SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB VENUS (Versatile ECR ion source for NUclear Science) is a next generation superconducting ECR ion source, designed to produce high current, high charge state ions for the 88-Inch Cyclotron at the Lawrence Berkeley National Laboratory. VENUS also serves as the prototype ion source for the RIA (Rare Isotope Accelerator) front end. The magnetic confinement configuration consists of three superconducting axial coils and six superconducting radial coils in a sextupole configuration. The nominal design fields of the axial magnets are 4T at injection and 3T at extraction; the nominal radial design field strength at the plasma chamber wall is 2T, making VENUS the world most powerful ECR plasma confinement structure. The magnetic field strength has been designed for optimum operation at 28 GHz. The four-year VENUS project has recently achieved two major milestones: The first plasma was ignited in June, the first mass-analyzed high charge state ion beam was extracted in September of 2002. The paper describes the ongoing commissioning. Initial results including first emittance measurements are presented. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Leitner, D (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 8 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 86 EP 88 DI 10.1109/PAC.2003.1288847 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600022 ER PT B AU Alessi, JG Beebe, E Graham, D Kponou, A Pikin, A Prelec, K Ritter, J Zajic, V AF Alessi, JG Beebe, E Graham, D Kponou, A Pikin, A Prelec, K Ritter, J Zajic, V BE Chew, J Lucas, P Webber, S TI Design of an EBIS for RHIC SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB An Electron Beam Ion Source (EBIS) can be used to produce beams of high charge state heavy ions, and is an excellent choice for injection into a synchrotron, since short pulses of high intensity can be produced for single-or few-turn injection into the ring. As a result of successful experiments on a test EBIS at BNL, we are now confident that an EBIS meeting RHIC requirements can be built. This EBIS would be part of a new linac-based preinjector which would serve as a modem alternative to the existing Tandem preinjectors, offering improvements in performance and operational simplicity. The BNL test EBIS, which is a 1/2 trap-length prototype of the RHIC EBIS, has produced > 10(9) ions per pulse of Au32+ in 10-20 microsecond pulses, and has exceeded our design goals. Performance of the test EBIS is summarized and the design of the RHIC EBIS presented. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Alessi, JG (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 6 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 89 EP 91 DI 10.1109/PAC.2003.1288848 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600023 ER PT B AU Srinivasan-Rao, T Ben-Zvi, I Burrill, A Citver, G Hershcovitch, A Pate, D Reuter, A Scaduto, J Zhao, Q Zhao, Y Delayen, J Kneisel, P Bluem, H Cole, M Favale, A Rathke, J Schultheiss, T AF Srinivasan-Rao, T Ben-Zvi, I Burrill, A Citver, G Hershcovitch, A Pate, D Reuter, A Scaduto, J Zhao, Q Zhao, Y Delayen, J Kneisel, P Bluem, H Cole, M Favale, A Rathke, J Schultheiss, T BE Chew, J Lucas, P Webber, S TI Design, construction and status of all niobium superconducting photoinjector at BNL SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB We present here the design and construction of an all niobium superconducting RF injector to generate high average current, high brightness electron beam. A 1/2 cell superconducting cavity has been designed, built, and tested. A cryostat has been built to cool the cavity to similar to2 K. The RF system can deliver up to 500 W at 1.3 GHz to the cavity. A mode-locked Nd:YVO4 laser, operating at 266 nm with 0.15 W average power, phase locked to the RF, will irradiate a laser cleaned Nb surface at the back wall of the cavity. Description of critical components and their status are presented in the paper. Based on DC measurements, QE of up to 10(-4) can be expected from such cavity C1 BNL, Upton, NY USA. RP Srinivasan-Rao, T (reprint author), BNL, Upton, NY USA. NR 3 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 92 EP 94 DI 10.1109/PAC.2003.1288849 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600024 ER PT B AU Brown, WJ Anderson, SG Barty, CPJ Crane, JK Cross, RR Fittinghoff, DN Hartemann, FV Kuba, J Le Sage, GP Slaughter, DR Springer, PT Tremaine, AM Rosenzweig, JB Gibson, DJ AF Brown, WJ Anderson, SG Barty, CPJ Crane, JK Cross, RR Fittinghoff, DN Hartemann, FV Kuba, J Le Sage, GP Slaughter, DR Springer, PT Tremaine, AM Rosenzweig, JB Gibson, DJ BE Chew, J Lucas, P Webber, S TI Generation of high brightness x-rays with the PLEIADES Thomson x-ray source SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The use of short laser pulses to generate high peak intensity, ultra-short x-ray pulses enables exciting new experimental capabilities, such as femtosecond pump-probe experiments used to temporally resolve material structural dynamics on atomic time scales. PLEIADES (Picosecond Laser Electron InterAction for the Dynamic Evaluation of Structures) is a next generation Thomson scattering x-ray source being developed at Lawrence Livermore National Laboratory (LLNL). Ultra-fast picosecond x-rays (10-200 keV) are generated by colliding an energetic electron beam (20-100 MeV) with a high intensity, sub-ps, 800 nm laser pulse. The peak brightness of the source is expected to exceed 10(20) photons/s/0.1% bandwidth/mm(2)/mrad(2). Simulations of the electron beam production, transport, and final focus are presented. Electron beam measurements, including emittance and final focus spot size are also presented and compared to simulation results. Measurements of x-ray production are also reported and compared to theoretical calculations. C1 LLNL, Livermore, CA USA. RP LLNL, Livermore, CA USA. NR 3 TC 0 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 95 EP 97 DI 10.1109/DODUGC.2003.1253381 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600025 ER PT B AU Stupakov, G AF Stupakov, G BE Chew, J Lucas, P Webber, S TI Theory and observations of microbunching instability in electron machines SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID UNDULATOR; RADIATION C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Stupakov, G (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM stupakov@slac.stanford.edu NR 35 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 102 EP 106 DI 10.1109/PAC.2003.1288852 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600027 ER PT B AU Holmes, JA Cousineau, S Danilov, V Henderson, S Shishlo, A Fedotov, A AF Holmes, JA Cousineau, S Danilov, V Henderson, S Shishlo, A Fedotov, A BE Chew, J Lucas, P Webber, S TI Computational studies of collective beam dynamics in high intensity rings SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Collective interactions of the beam with itself and with its periodic lattice surroundings in high intensity accelerator rings, such as PSR and SNS, can lead to beam growth, halo generation, and losses. These interactions also provide a rich source of dynamic phenomena for analytical, computational, and experimental study. With continuing increases in model development and computer power, a number of sophisticated codes are now capable of detailed realistic studies of collective beam dynamics in rings. We concentrate here on a computational examination of high intensity beam dynamics in SNS. These studies include the effects of the accelerator lattice, space charge, impedances, losses and collimation, and magnet errors. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Holmes, JA (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. EM scousine@ornl.gov; shenderson@sns.gov 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 0-7803-7738-9 PY 2003 BP 117 EP 119 DI 10.1109/PAC.2003.1288855 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600030 ER PT B AU Fischer, W Blaskiewicz, M Brennan, JM Cameron, P Connolly, R Montag, C Peggs, S Pilat, F Ptitsyn, V Tepikian, S Trbojevic, D van Zeijts, J AF Fischer, W Blaskiewicz, M Brennan, JM Cameron, P Connolly, R Montag, C Peggs, S Pilat, F Ptitsyn, V Tepikian, S Trbojevic, D van Zeijts, J BE Chew, J Lucas, P Webber, S TI Observation of strong-strong and other beam-beam effects in RHIC SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB RHIC is currently the only hadron collider in which strong-strong beam-beam effects can be seen. For the first time, coherent beam-beam modes were observed in a bunched beam hadron collider. Other beam-beam effects in RHIC were observed in operation and in dedicated experiments with gold ions, deuterons and protons. Observations include measurements of beam-beam induced tune shifts, lifetime and emittance growth measurements with and without beam-beam interaction, and background rates as a function of tunes. During ramps unequal radio frequencies in the two rings cause the crossing points to move longitudinally. Thus bunches experience beam-beam interactions only in intervals and the tunes are modulated. In this article we summarize the most important beam-beam observations made so far. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Fischer, W (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 6 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 135 EP 137 DI 10.1109/PAC.2003.1288861 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600036 ER PT B AU Moog, ER AF Moog, ER BE Chew, J Lucas, P Webber, S TI Novel insertion devices SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID UNDULATOR AB Permanent magnet planar undulators are used at synchrotrons worldwide and serve as versatile radiation sources. For some experiments, however, photon characteristics other than what is achievable with planar devices are desired. Undulators can be tailored to adjust photon characteristics, such as brightness, tuning curves, polarization, harmonic content, and heat load, to suit them to a particular experiment. One specialized device is the electromagnetic circularly polarizing undulator at the Advanced Photon Source (APS). At a few facilities, plans are under-way to build superconducting undulators with short period lengths to provide higher energy radiation. At APS, the possibility of building an undulator with a variable period is also being investigated. Some users, driven by a desire for lower on-axis heat load or for circular polarization, prefer other types of devices, such as Apple-style undulators or figure-eight devices. Characteristics of the radiation output and advantages of these various types of devices are presented. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Moog, ER (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA. 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 0-7803-7738-9 PY 2003 BP 156 EP 160 DI 10.1109/PAC.2003.1288866 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600041 ER PT B AU Willen, E Anerella, M Escallier, J Ganetis, G Ghosh, A Gupta, R Harrison, M Jain, A MacKay, W Marone, A Muratore, J Plate, S Thomas, R Wanderer, P Wu, KC AF Willen, E Anerella, M Escallier, J Ganetis, G Ghosh, A Gupta, R Harrison, M Jain, A MacKay, W Marone, A Muratore, J Plate, S Thomas, R Wanderer, P Wu, KC BE Chew, J Lucas, P Webber, S TI Performance summary of the helical magnets for RHIC SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB A series of four Snake and eight Rotator superconducting helical magnet assemblies has been built and installed in RHIC to control the polarization of protons during acceleration and storage in that machine. Each of these assemblies consists of four 2.4 m long dipole magnets in each of which the field rotates through 360 degrees along the magnet's length. The magnets were made by winding one millimeter diameter superconducting 7-strand cable into slots milled into thick-walled aluminum tubes. The magnets produce 4 Testa field at a current of 320 amperes and are quench-protected with 0.050 ohm resistors placed across the winding in each slot. A total of 48 of these 2.4 in magnets has been built, tested and installed. This paper summarizes their quench performance as well as their field uniformity, of which the integral field is the most critical. All magnets reached the required operating field level of 4 T, and the integral field of the magnets was generally about half of the maximum permissible level of 0.050 Testa meters. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Willen, E (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 5 TC 2 Z9 2 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 164 EP 166 DI 10.1109/PAC.2003.1288868 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600043 ER PT B AU Chiesa, S Caspi, S Dietderich, DR Ferracin, P Gourlay, SA Hafalia, RR Lietzke, AF AF Chiesa, S Caspi, S Dietderich, DR Ferracin, P Gourlay, SA Hafalia, RR Lietzke, AF BE Chew, J Lucas, P Webber, S TI Magnetic field measurements of the NB3SN common coil dipole RD3C SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Goal of the LBNL Superconducting Magnet Program is to establish the technologies associated with very high field superconducting magnets, to provide cost-effective options for the next generation of high-energy colliders. Recent efforts have focused on the design, fabrication and test of Nb3Sn common coil dipoles. The RD3b test has demonstrated operation at very high field and stress levels. RD3c is the first common coil prototype addressing field quality issues. A flat racetrack coil was wound on both sides of a central bore plate, using hard spacers to control the geometric field harmonics. The resulting coil module was inserted between the outer coil modules of RD3b, and pre-stressed using the reusable yoke and shell loading structure. In this paper, magnetic field measurements of RD3c are reported and compared with theoretical predictions. C1 LBNL, Berkeley, CA 94720 USA. RP Chiesa, S (reprint author), LBNL, Berkeley, CA 94720 USA. NR 5 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 170 EP 172 DI 10.1109/PAC.2003.1288870 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600045 ER PT B AU Murphy, JB AF Murphy, JB BE Chew, J Lucas, P Webber, S TI Energy recovery linacs light sources: An overview SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID GUN; FEL AB Sparked by the highly successful operation of energy recovery linac (ERL) free electron lasers (FELs) at TJNAF [1] and JAERI [2] and also by the novel MARS light source (LS) proposal from BINP [3], numerous facilities worldwide are now considering ERL based light source projects. A survey of the various light sources and FELs based on ERL technology will be given. An overview of the critical R&D issues that must be addressed in future ERLs will also be presented. C1 Brookhaven Natl Lab, NSLS, Upton, NY 11973 USA. RP Murphy, JB (reprint author), Brookhaven Natl Lab, NSLS, Upton, NY 11973 USA. NR 37 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 176 EP 180 DI 10.1109/PAC.2003.1288872 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600047 ER PT B AU Neil, GR AF Neil, GR BE Chew, J Lucas, P Webber, S TI Fel oscillators SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID FREE-ELECTRON LASER; STORAGE-RING; ENERGY RECOVERY; QUANTUM-WELLS; RADIATION; OPERATION AB FEL Oscillators have been around since 1977 providing not only a test bed for the physics of Free Electron Lasers and electron/photon interactions but as a workhorse of scientific research. More than 30 FEL oscillators are presently operating around the world spanning a wavelength range from the mm region to the ultraviolet using DC and rf linear accelerators and storage rings as electron sources. The characteristics that have driven the development of these sources are the desire for high peak and average power, high micropulse energies, wavelength tunability, timing flexibility, and wavelengths that are unavailable from more conventional laser sources. Substantial user programs have been performed using such sources encompassing medicine, biology, solid state research, atomic and molecular physics, effects of non-linear fields, surface science, polymer science, pulsed laser vapor deposition, to name just a few. Recently the incorporation of energy recovery systems has permitted extension of the average power capabilities to the kW level and beyond. Moreover the use of collective radiation and Thompson/Compton scattering has produced substantial fluxes of THz radiation, X-rays, and gamma rays. This paper will discuss at a summary level the physics of such devices, survey existing and planned facilities, and touch on the applications that have driven the development of these popular light sources. C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA USA. RP Neil, GR (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA USA. NR 39 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 181 EP 185 DI 10.1109/PAC.2003.1288873 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600048 ER PT B AU Corlett, JN Barletta, WA DeSantis, S Doolittle, L Fawley, WM Green, MA Heimann, P Leone, S Lidia, S Li, D Ratti, A Robinson, K Schoenlein, R Staples, J Wan, W Wells, R Wolski, A Zholents, A Parmigiani, F Placidi, M Pirkl, W Rimmer, RA Wang, S AF Corlett, JN Barletta, WA DeSantis, S Doolittle, L Fawley, WM Green, MA Heimann, P Leone, S Lidia, S Li, D Ratti, A Robinson, K Schoenlein, R Staples, J Wan, W Wells, R Wolski, A Zholents, A Parmigiani, F Placidi, M Pirkl, W Rimmer, RA Wang, S BE Chew, J Lucas, P Webber, S TI A recirculating linac-based facility for ultrafast x-ray science SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID GENERATION AB We present an updated design for a proposed source of ultra-fast synchrotron radiation pulses based on a recirculating superconducting linac [1,21, in particular the incorporation of EUV and soft x-ray production. The project has been named LUX - Linac-based Ultrafast X-ray facility. The source produces intense x-ray pulses with duration of 10-100 fs at a 10 kHz repetition rate, with synchronization of 10's fs, optimized for the study of ultra-fast dynamics. The photon range covers the EUV to hard x-ray spectrum by use of seeded harmonic generation in undulators, and a specialized technique for ultra-short-pulse photon production in the 1-10 keV range. High-brightness rf photocathodes produce electron bunches which are optimized either for coherent emission in free-electron lasers, or to provide a large x/y emittance ration and small vertical emittance which allows for manipulation to produce short-pulse hard x-rays. An injector linac accelerates the beam to 120 MeV, and is followed by four passes through a 600-720 MeV recirculating linac. We outline the major technical components of the proposed facility. C1 LBNL, Berkeley, CA USA. RP Corlett, JN (reprint author), LBNL, Berkeley, CA USA. RI Schoenlein, Robert/D-1301-2014; OI Schoenlein, Robert/0000-0002-6066-7566; Parmigiani, Fulvio/0000-0001-9529-7406; Wolski, Andrzej/0000-0002-5057-5588 NR 7 TC 2 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 186 EP 188 DI 10.1109/PAC.2003.1288874 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600049 ER PT B AU Bogacz, A Beard, K Bengtsson, J Butler, C Chao, Y Chattopadhyay, S Dong, H Douglas, D Freyberger, A Guerra, A Hicks, R Hofler, A Hovater, C Hutton, A Kazimi, R Lauze, R Merminga, L Plawski, T Roblin, Y Spata, M Tennant, C Tiefenback, M Bernhard, A Magerl, A Toyokawa, H AF Bogacz, A Beard, K Bengtsson, J Butler, C Chao, Y Chattopadhyay, S Dong, H Douglas, D Freyberger, A Guerra, A Hicks, R Hofler, A Hovater, C Hutton, A Kazimi, R Lauze, R Merminga, L Plawski, T Roblin, Y Spata, M Tennant, C Tiefenback, M Bernhard, A Magerl, A Toyokawa, H BE Chew, J Lucas, P Webber, S TI CEBAF energy recovery experiment SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB A successful GeV scale energy recovery demonstration with high ratio of accelerated-to-recovered energies (50: 1) was recently carried out on the CEBAF recirculating linear accelerator. Future high energy (multi-GeV), high current (hundreds of milli-Amperes) beams would require gigaWatt-class RF systems in conventional linacs - a prohibitively expensive proposition. However, invoking energy recovery [1] alleviates extreme RF power demands; required RF power becomes nearly independent of beam current, which improves linac efficiency and increases cost effectiveness. Furthermore, energy recovering linacs promise efficiencies of storage rings, while maintaining beam quality of linacs: superior emittance and energy spread and short bunches (sub-pico sec.). Finally, energy recovery alleviates shielding, if the beam is dumped below the neutron production threshold. Jefferson Lab has demonstrated its expertise in the field of Energy Recovery Linacs (ERLs) with the successful operation of the Infrared FEL, where 5 mA of average beam current have been accelerated up to 50 MeV and the energy stored in the beam was recovered via deceleration and given back to the RF power source. To date this has been the largest scale demonstration of energy recovery. C1 Jefferson Lab, Newport News, VA 23606 USA. RP Bogacz, A (reprint author), Jefferson Lab, Newport News, VA 23606 USA. NR 3 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 195 EP 197 DI 10.1109/PAC.2003.1288877 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600052 ER PT B AU Li, R AF Li, R BE Chew, J Lucas, P Webber, S TI Applications of the cancellation effect in CSR studies SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID RADIATION; CIRCLE C1 Jefferson Lab, Newport News, VA USA. RP Li, R (reprint author), Jefferson Lab, Newport News, VA USA. 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 0-7803-7738-9 PY 2003 BP 208 EP 210 DI 10.1109/PAC.2003.1288880 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600055 ER PT B AU Doyuran, A DiMauro, L Graves, W Heese, R Johnson, ED Krinsky, S Loos, H Murphy, JB Rakowsky, G Rose, J Shaftan, T Sheehy, B Shen, Y Skaritka, J Wang, XJ Wu, Z Yu, LH AF Doyuran, A DiMauro, L Graves, W Heese, R Johnson, ED Krinsky, S Loos, H Murphy, JB Rakowsky, G Rose, J Shaftan, T Sheehy, B Shen, Y Skaritka, J Wang, XJ Wu, Z Yu, LH BE Chew, J Lucas, P Webber, S TI Saturation of the NSLS DUV-FEL at BNL SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID FREE-ELECTRON LASER; GENERATION; RADIATION; GAIN AB The Deep Ultra Violet Free Electron Laser (DUV-FEL) experiment has reached a milestone by saturating the Free Electron Laser using High Gain Harmonic Generation (HGHG) method in the Source Development Laboratory (SDL) at NSLS. It utilizes the 10 m long, 3.9 cm period NISUS wiggler. The goal of the project is to produce radiation at a wavelength less than 100 nm, utilizing the HGHG method. HGHG at 266 nm has been accomplished by seeding with the 800 nm Ti:Sapphire laser and observed saturation. The third harmonic at 88 nm accompanying the 266 nm is being used in an ion pair imaging experiment in chemistry. We discuss the measurement of energy, gain, spectrum, and pulse length of the FEL output. We also describe the diagnostics used for operating the FEL. C1 BNL, Upton, NY USA. RP Doyuran, A (reprint author), BNL, Upton, NY USA. RI Shaftan, Timur/A-8443-2009; OI Loos, Henrik/0000-0001-5085-0562 NR 16 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 217 EP 219 DI 10.1109/PAC.2003.1288883 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600058 ER PT B AU Robin, D AF Robin, D BE Chew, J Lucas, P Webber, S TI Superbend upgrade at the advanced light source SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID MAGNET AB At the ALS there had been an increasing demand for additional high brightness hard x-ray beamlines in the 7 to 40 keV range. In response to that demand, the ALS storage ring was modified in August 2001. Three 1.3 tesla normal conducting bending magnets were removed and replaced with three 5 Tesla superconducting magnets (Superbends). The radiation produced by these Superbends is an order of magnitude higher in photon brightness and flux at 12 keV than that of the 1.3 Tesla bends, making them excellent sources of hard x-rays for protein crystallography and other hard x-ray applications. At the same time the Superbends do not compromise the performance of the facility in the UV and soft x-ray regions of the spectrum. The Superbend will eventually feed 12 new beam lines greatly enhancing the facility's capacity in the hard x-ray region. The Superbend project is the biggest upgrade to the ALS storage ring since it was commissioned in 1993. In this paper we present a history of the project, as well as the installation, commissioning, and resulting performance of the ALS with Superbends. C1 LBNL, Superbend Team, Berkeley, CA 94720 USA. RP Robin, D (reprint author), LBNL, Superbend Team, Berkeley, CA 94720 USA. NR 20 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 224 EP 228 DI 10.1109/PAC.2003.1288885 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600060 ER PT B AU Hettel, R Akre, R Allison, S Bellomo, P Boyce, R Cadapan, L Cassel, R Choi, B Corbett, W Dell'Orco, D Elioff, T Evans, I Fuller, R Hill, A Keeley, D Kurita, N Langton, J Leyh, G Limborg, C Macnair, D Martin, D Mcintosh, P Medvedko, E Ng, C Nzeadibe, I Olsen, J Ortega, M Pappas, C Park, S Rabedeau, T Rarback, H Ringwall, A Rodriguez, P Safranek, J Schwarz, H Scott, B Sebek, J Smith, S Straumann, T Tanabe, J Terebilo, A Trautwein, A Wennelskirchen, C Widmeyer, M Yotam, R Zuo, K AF Hettel, R Akre, R Allison, S Bellomo, P Boyce, R Cadapan, L Cassel, R Choi, B Corbett, W Dell'Orco, D Elioff, T Evans, I Fuller, R Hill, A Keeley, D Kurita, N Langton, J Leyh, G Limborg, C Macnair, D Martin, D Mcintosh, P Medvedko, E Ng, C Nzeadibe, I Olsen, J Ortega, M Pappas, C Park, S Rabedeau, T Rarback, H Ringwall, A Rodriguez, P Safranek, J Schwarz, H Scott, B Sebek, J Smith, S Straumann, T Tanabe, J Terebilo, A Trautwein, A Wennelskirchen, C Widmeyer, M Yotam, R Zuo, K BE Chew, J Lucas, P Webber, S TI SPEAR 3 upgrade project: The final year SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB During April, 2003, the SPEAR 2 storage ring, which served the high energy physics community from 1972 to 1987, and the synchrotron radiation community for an additional 15 years, was removed from its shielding tunnel in order to install the new 3-GeV, 500-mA SPEAR 3 light source. From May to November, SSRL will excavate the tunnel floor and pour a new concrete floor, and then install pre-assembled girders holding magnets, copper vacuum chambers, PEP-II-style rf cavities, and beam line front end components. At the same time, power supply, instrumentation and control, and other ancillary systems will be configured, leading to a commissioning period beginning in November 2003. The progress of accelerator component implementation and installation during the final year of the project will be reviewed. C1 Stanford Univ, SSRL, SLAC, Stanford, CA 94309 USA. RP Hettel, R (reprint author), Stanford Univ, SSRL, SLAC, Stanford, CA 94309 USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 235 EP 237 DI 10.1109/PAC.2003.1288888 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600063 ER PT B AU Podobedov, B Ablett, JM Berman, L Biscardi, R Carr, GL Casey, B Dierker, S Doyuran, A Heese, R Hulbert, S Johnson, E Kao, CC Kramer, SL Loos, H Murphy, JB Pindak, R Pjerov, S Rose, J Shaftan, T Sheehy, B Siddons, P Towne, N Wang, JM Wang, XJ Yu, LH AF Podobedov, B Ablett, JM Berman, L Biscardi, R Carr, GL Casey, B Dierker, S Doyuran, A Heese, R Hulbert, S Johnson, E Kao, CC Kramer, SL Loos, H Murphy, JB Pindak, R Pjerov, S Rose, J Shaftan, T Sheehy, B Siddons, P Towne, N Wang, JM Wang, XJ Yu, LH BE Chew, J Lucas, P Webber, S TI NSLS upgrade concept SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB To address the growing needs of the NSLS user community we are aggressively pursuing R&D towards a facility upgrade. The present goals are a 3 GeV ultra-low emittance storage ring, tailored to the 5-20 keV photon energy range, that will triple the present NSLS ID capacity, and provide three orders of magnitude increase in brightness over the present brightest NSLS beamlines. To achieve these goals we propose a 24 period TBA lattice, with extensive use of super-conducting small gap undulators. This paper reviews our preliminary design and the key accelerator physics issues. C1 Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA. RP Podobedov, B (reprint author), Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA. RI Shaftan, Timur/A-8443-2009; OI Loos, Henrik/0000-0001-5085-0562 NR 6 TC 2 Z9 2 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 241 EP 243 DI 10.1109/PAC.2003.1288890 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600065 ER PT B AU Jackson, A Nishimura, H AF Jackson, A Nishimura, H BE Chew, J Lucas, P Webber, S TI Single-particle beam dynamics in Boomerang SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB We describe simulations of the beam dynamics in the storage ring (Boomerang), a 3-GeV third-generation light source being designed for the Australian Synchrotron Project[1]. The simulations were performed with the code Goemon[2]. They form the basis for design specifications for storage ring components (apertures, alignment tolerances, magnet quality, etc.), and for determining performance characteristics such as coupling and beam lifetime. C1 LBNL, Melbourne, Vic, Australia. RP Jackson, A (reprint author), LBNL, Melbourne, Vic, Australia. 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 BN 0-7803-7738-9 PY 2003 BP 244 EP 246 DI 10.1109/PAC.2003.1288891 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600066 ER PT B AU Sereno, NS Borland, M Shang, H AF Sereno, NS Borland, M Shang, H BE Chew, J Lucas, P Webber, S TI Advanced photon source booster synchrotron low-emittance lattice commissioning results SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Recent efforts at the APS have focused on reducing beam loss during storage ring (SR) injection to minimize radiation damage to the APS undulators. Reducing beam loss at injection is particularly important during top-up operation where injection occurs once every two minutes. One way to potentially improve injection efficiency is to simply reduce the emittance of the beam from the APS booster, thereby allowing the beam to be brought closer to the injection septum. Recently several low-emittance operating modes for the APS booster have been studied. The emittance is lowered from the standard value by increasing the horizontal tune in stages. The vertical tune is simultaneously decreased to minimize the required defocusing sextupole strength for chromaticity correction. Calculations indicate that up to 29% reduction in emittance is possible-a result that has been achieved in studies. A lattice with emittance 17% lower than the standard lattice has been thoroughly commissioned and has been used for routine APS top-up operation since July 2002. Results of beam measurements and comparison to calculations for various low-emittance lattices are reported in this paper. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Sereno, NS (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. 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 0-7803-7738-9 PY 2003 BP 247 EP 249 DI 10.1109/PAC.2003.1288892 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600067 ER PT B AU Emery, L Borland, M AF Emery, L Borland, M BE Chew, J Lucas, P Webber, S TI Possible long-term improvements to the advanced photon source SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Although third-generation light sources like the Advanced Photon Source (APS) already deliver very high performance, there are many user experiments that could benefit from further improvements. Improved brightness, improved beam stability, higher single-bunch current, more beamlines, and shorter bunches are all of interest to certain user groups. In this paper, we outline some possibilities to meet some of these needs. Presently, the APS has an effective horizontal emittance of 3.0 nm-rad, achieved by allowing dispersion in the straight sections. Top-up allows us to go lower in spite of the poor lifetime, which we could do by adding pole-face windings to the dipoles to reduce the emittance to 1.8 nm-rad. A more dramatic effort would involve shortening the dipoles, which would have the added benefit of increasing the straight-section length from 5 m to 9 m. Beyond this, several much more speculative ideas have been explored. One of these is to use the APS ring as part of an energy recovery linac facility, with single- or multi-turn circulation of a high-brightness linac beam in the existing ring. We present some preliminary simulations of the performance of this option. Another possibility is replacement of the APS storage ring with a next-generation ring capable of ultra-low emittance and making full use of top-up. We present a concept for a facility that promises 75 pm-rad horizontal emittance and 10m-long straight sections. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Emery, L (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 6 TC 11 Z9 11 U1 2 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 256 EP 258 DI 10.1109/PAC.2003.1288895 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600070 ER PT B AU Cousineau, S AF Cousineau, S BE Chew, J Lucas, P Webber, S TI Simulation tools for high intensity rings SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Several codes have been developed specifically to simulate beam dynamics in high intensity rings. These codes contain detailed algorithms for modeling the relevant physics in the beam, from single particle transport to important collective effects, including space charge and impedances. Among the various codes, a number of different methods have been adopted for the treatment of space charge. The codes have been applied to a variety of problems in existing machines, as well as for the study, design, and optimization of future machines. A review of existing ring simulation codes is presented, with specific emphasis on the space charge implementation. A more in-depth description of the features and application histories of a few specific codes is given, as well as a summary of code benchmarks with experimental data. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. RP Cousineau, S (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37830 USA. NR 14 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 259 EP 263 DI 10.1109/PAC.2003.1288896 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600071 ER PT B AU Malitsky, N Talman, R Blaskiewicz, M Calaga, R Fliller, R Luccio, A Satogata, T Wei, J AF Malitsky, N Talman, R Blaskiewicz, M Calaga, R Fliller, R Luccio, A Satogata, T Wei, J BE Chew, J Lucas, P Webber, S TI Towards the UAL open source project SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Unified Accelerator Libraries (UAL[1]) software has been introduced as an open accelerator simulation environment providing support for many-to-many associations between diverse accelerator algorithms and diverse accelerator applications. Recently, UAL has been successfully applied to the development and study of the SNS Ring realistic beam dynamics modelincluding a complex combination of several physical effects and dynamic processes (such as injection painting, field errors, space charge effects, impedances, fringe fields, misalignments, etc.). The SNS and previous applications have confirmed the major UAL conceptual solutions and have encouraged us to transform this software into an Open Source project[2]. The major efforts have been releasing documentation and consolidation of UAL modules based on the Accelerator Propagator Framework (APF). At this time, the documentation encompasses User Guide, API specification of C++ classes, Perl User interface, and a collection of feature-illustrating examples. Also APF has been implemented to enhance the UAL infrastructure by providing a uniform mechanism for development and integration of accelerator algorithms. The key part of this approach is the Accelerator Propagator Description Format (APDF) that provides physicists a mechanism for switching among simulation models within their applications. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Malitsky, N (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 13 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 272 EP 274 DI 10.1109/PAC.2003.1288899 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600074 ER PT B AU Friedman, A Bieniosek, FM Celata, CM Grote, DP Prost, LR Seidl, PA AF Friedman, A Bieniosek, FM Celata, CM Grote, DP Prost, LR Seidl, PA BE Chew, J Lucas, P Webber, S TI Simulation using initial 4D beam particle distributions synthesized from experimental data SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB In experiments exploring the dynamics of intense beams for Heavy Ion Fusion, detailed 2D projections of the beam's 4D transverse particle distribution function f(x,y,x' =_ p(x)/p(z), y' equivalent to p(y)/p(z)) are obtained at a sequence of stations, using moving slits and Faraday cups. These projections do not uniquely specify the 4D distribution, so we use maximum-entropy Monte-Carlo techniques to complete the specification and tomographically "synthesize" an approximation to f. Our initial studies used simulated beam data from a self-consistent 2D simulation of the High Current Experiment (HCX) [1] at LBNL. Runs initiated using a simple "semi-Gaussian" model distribution failed to exhibit an emittance evolution similar to that of the reference case. Initial distributions synthesized from the (simulated) slit scan data yielded much better agreement. We have begun to launch simulations of HCX with initial conditions synthesized from slit-scan diagnostics. We present here the techniques, initial simulation results, initial analysis of new "optical slit" data yielding projections such as f (x, y, x'), and future plans. C1 LLNL, Livermore, CA 94550 USA. RP Friedman, A (reprint author), LLNL, Livermore, CA 94550 USA. RI Frieze, Alan/B-8140-2017 OI Frieze, Alan/0000-0002-8481-5615 NR 3 TC 6 Z9 6 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 275 EP 277 DI 10.1109/PAC.2003.1288900 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600075 ER PT B AU Lenkszus, F Emery, L Soliday, R Shang, H Singh, O Borland, M AF Lenkszus, F Emery, L Soliday, R Shang, H Singh, O Borland, M BE Chew, J Lucas, P Webber, S TI Integration of orbit control with real-time feedback SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The Advanced Photon Source uses two distinct control programs for orbit control and stability-a full-featured workstation-based program for orbit control (sddscontrollaw) and an EPICS-based system, the Real-Time Fast Feedback System (RTFS), to reduce orbit motion. The sddscontrollaw program has been ported to EPICS and moved from the UNIX environment to an EPICS IOC attached to the RTFS. This EPICS-based program uses the RTFS's reflective memory to gather beam position information and write corrector power supplies, thus avoiding variable network latencies. This allows the orbit control to run at a correction rate 50 times that of the workstation implementation, which virtually eliminates orbit motion caused by insertion device gap changes. Issues raised by the integration of orbit control into the real-time feedback system and performance improvements are discussed. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM frl@aps.anl.gov; emery@aps.anl.gov NR 7 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 283 EP 287 DI 10.1109/PAC.2003.1288902 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600077 ER PT B AU Williams, EL Lawson, GS AF Williams, EL Lawson, GS BE Chew, J Lucas, P Webber, S TI Control systems on low cost computers SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Computing infrastructures for accelerator control systems can now be built using low cost, commodity-type computers. The commonly used EPICS control system toolkit has been adapted to facilitate its deployment on Pentium-based PCs running the Linux operating system, as well as on other inexpensive platforms. Low-cost, reliable enterprise-class computers can be obtained from many commercial vendors for such control system network-based services as Domain Name Service (DNS), Network Information Services (NIS), and Dynamic Host Configuration Protocol (DHCP). Control system file servers can also be configured using inexpensive rack-mounted PCs and multiple monitor operator consoles can be built with Linux-based PCs or standard X-windows software with high performance video graphic adapters. At the front end of the control system, input-output controllers can be configured also as PCs running embedded Windows. Several accelerator laboratories, including the Spallation Neutron Source (SNS) at the Oak Ridge National Laboratory are taking advantage of these possibilities. This paper will review the use of inexpensive computers in the accelerator community, with particular emphasis on the issues and applications at SNS. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. RP Williams, EL (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. 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 BN 0-7803-7738-9 PY 2003 BP 288 EP 290 DI 10.1109/PAC.2003.1288903 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600078 ER PT B AU Chao, YC AF Chao, YC BE Chew, J Lucas, P Webber, S TI Measuring and matching transport optics at Jefferson lab SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Well-controlled optical transport over long range is important for many types of nuclear and high energy physics experiments. it is essential in achieving the desired beam parameters, minimizing optical sensitivity, and ensuring acceptable helicity correlated orbit differences for parity-type experiments. A precise and rigorous program for evaluating optical matching errors, and a deterministic algorithm for obtaining global matching solutions thus holds considerable promise for both accelerator design and operation, although the latter has defied attempts so far due to its almost intractable complexity. For the CEBAF accelerator at Jefferson Lab, this difficulty is further exacerbated by the extreme matching condition necessary for a 5 pass recirculating linac, elements that can introduce considerable optical error, and loss of long-range difference orbit orthogonality due to these effects, all of which impose a very tight demand on the accuracy of the measured transfer matrix as input to the matching algorithm. Research in methods for both measuring and matching optical transport has led to recent successful demonstration of deterministic matching of the optical transport of CEBAF. The global nature of the matching algorithm allows efficient exploration of solutions not easily accessible by traditional methods and serves to signal configuration flaws in the machine. C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Chao, YC (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. 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 BN 0-7803-7738-9 PY 2003 BP 294 EP 296 DI 10.1109/PAC.2003.1288905 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600080 ER PT B AU Furman, MA AF Furman, MA BE Chew, J Lucas, P Webber, S TI Formation and dissipation of the electron cloud SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB We present an understanding of the effect of various features of the secondary emission yield (SEY) and secondary emission spectrum on the formation and dissipation of the electron cloud (EC). This understanding is based on dedicated experimental studies at several storage rings and systematic benchmarks of simulations against these measurements. C1 LBNL, Berkeley, CA 94720 USA. RP Furman, MA (reprint author), LBNL, Berkeley, CA 94720 USA. EM mafurman@lbl.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 0-7803-7738-9 PY 2003 BP 297 EP 301 DI 10.1109/PAC.2003.1288906 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600081 ER PT B AU Blaskiewicz, M AF Blaskiewicz, M BE Chew, J Lucas, P Webber, S TI Electron cloud effects in present and future high intensity Hadron machines SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID POSITRON STORAGE-RINGS; INSTABILITY; PSR C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Blaskiewicz, M (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 47 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 302 EP 306 DI 10.1109/PAC.2003.1288907 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600082 ER PT B AU Novokhatski, A Seeman, J AF Novokhatski, A Seeman, J BE Chew, J Lucas, P Webber, S TI Simulation study of electron cloud multipacting in straight sections of PEP-II SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Simulation studies of electron cloud multipacting were performed for the SLAC B-factory vacuum chamber for different bunch trains and solenoidal magnetic field. Results show that increasing the number of positron bunches by a factor of two and keeping the same current per bunch means that the solenoidal field needs to be doubled in order to keep the same electron cloud density. Fortunately there are regions that are "free of multipacting" at smaller values of field where the electron cloud density can not get very high. To build the electron cloud, positron bunches have to lose some amount of their kinetic energy through the longitudinal electric field. When the cloud is already established, this longitudinal field acts as an oscillating force. This action is similar to the action of RF fields in a cavity. As a result the positron bunches will have different lengths throughout the train. C1 SLAC, Stanford, CA 94309 USA. RP Novokhatski, A (reprint author), SLAC, Stanford, CA 94309 USA. 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 0-7803-7738-9 PY 2003 BP 315 EP 317 DI 10.1109/PAC.2003.1288910 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600085 ER PT B AU Teytelman, D AF Teytelman, D BE Chew, J Lucas, P Webber, S TI Survey of digital feedback systems in high current storage rings SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB In the last decade demand for brightness in synchrotron light sources and luminosity in circular colliders led to construction of multiple high current storage rings. Many of these new machines require feedback systems to achieve design stored beam currents. In the same time frame the rapid advances in the technology of digital signal processing allowed the implementation of these complex feedback systems. In this paper I concentrate on three applications of feedback to storage rings: orbit control in light sources, coupled-bunch instability control, and low-level RF control. Each of these applications is challenging in areas of processing bandwidth, algorithm complexity, and control of time-varying beam and system dynamics. I will review existing implementations as well as comment on promising future directions. C1 SLAC, Menlo Pk, CA 94025 USA. RP Teytelman, D (reprint author), SLAC, Menlo Pk, CA 94025 USA. EM dim@slac.stanford.edu NR 17 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 318 EP 322 DI 10.1109/PAC.2003.1288911 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600086 ER PT B AU Beltran, C Browman, AA Macek, RJ AF Beltran, C Browman, AA Macek, RJ BE Chew, J Lucas, P Webber, S TI Calculations and observations of the longitudinal instability caused by the ferrite inductors at the Los Alamos proton storage ring (PSR) SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The frequency dependence of the complex permeability of the ferrite (at room temperature and 125degreesC) used in the inductors at PSR has been determined by comparing the S-11 parameters from a jig containing ferrite and a MAFIA [1] (a program package for the computation of electromagnetic fields) simulation of the jig. Both the frequency response and the longitudinal impedance of the inductive inserts were obtained by simulating the inductor cavity in MAFIA using the ferrite properties from the aforementioned fit. Experimental observations of the longitudinal instability caused by the ferrite inductors at room temperature in a bunched coasting beam have been made. Comparisons of observed and simulated growth times, resonant frequencies, and width of the instability will be discussed. C1 LANL, Los Alamos, NM USA. RP Beltran, C (reprint author), LANL, Los Alamos, NM USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 326 EP 328 DI 10.1109/PAC.2003.1288913 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600088 ER PT B AU Shaftan, T Loos, H Sheehy, B Carr, L Huang, Z Limborg, C Graves, WS AF Shaftan, T Loos, H Sheehy, B Carr, L Huang, Z Limborg, C Graves, WS BE Chew, J Lucas, P Webber, S TI Microbunching and beam break-up in DUV-FEL accelerator SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB We present the results of electron beam longitudinal modulation studies in the DUV-FEL accelerator. For bunch length determination we used the "zero-phasing" method, based on a measurement of the chirped electron bunch energy spectra. The measurements revealed a spiky structure in the longitudinal phase space [1]. A model based on space charge effect is considered [2] to explain of the obtained phenomena. The analysis of the energy spectra has shown a sensitivity of the structure to the electron beam peak current, energy and longitudinal non-uniformity of the RF gun drive laser. Analytical calculations have demonstrated a qualitative agreement with experimental observations. Several experiments have been made to compare with theory; measured results are reviewed in this paper. The obtained effect is briefly discussed in relation to high brightness accelerators. C1 SLAC, Menlo Pk, CA USA. RP Shaftan, T (reprint author), SLAC, Menlo Pk, CA USA. RI Shaftan, Timur/A-8443-2009; OI Loos, Henrik/0000-0001-5085-0562 NR 7 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 329 EP 331 DI 10.1109/PAC.2003.1288914 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600089 ER PT B AU Beard, K Merminga, L Yunn, B AF Beard, K Merminga, L Yunn, B BE Chew, J Lucas, P Webber, S TI Tools to predict beam breakup in recirculating linacs SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB An important limitation on the maximum beam current in a recirculating linac is due to beam breakup caused by higher order modes (HOM) excited in the RF cavities. A HOM delivers a transverse kick to a beam bunch, the bunch on the next pass can then drive the HOM and cause it to grow until the beam is lost. Two codes, MATBBU and TDBBU, have been written to estimate the threshold current for a set of HOMs and accelerator optics. The relative merits and limitations of each is discussed in detail. C1 TJNAF, Newport News, VA 23606 USA. RP Beard, K (reprint author), TJNAF, Newport News, VA 23606 USA. NR 8 TC 5 Z9 5 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 332 EP 334 DI 10.1109/PAC.2003.1288915 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600090 ER PT B AU Sullivan, M AF Sullivan, M BE Chew, J Lucas, P Webber, S TI Interaction region upgrades of E+E- B-Factories SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Both the PEP-II and KEKB B-Factories have plans to upgrade their Interaction Regions (IRs) in order to improve luminosity performance. Last summer PEP-II added cooling to the IR beam pipe in order to increase beam currents thereby raising the luminosity. In addition, PEP-II is working on a design that modifies the permanent magnets near the Interaction Point (IP) for an even higher luminosity increase. KEKB is also planning an improvement to their IR that will decrease the detector beam pipe radius. In addition, KEK has a design to increase the luminosity of KEKB to 1x10(35) cm(-2) sec(-1) which includes changes to the IR. PEP-II is also investigating the feasibility of a 1x10(36) cm(-2) sec(-1) luminosity design. I summarize these various upgrades and concentrate on issues common to the different designs. C1 Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Sullivan, M (reprint author), Stanford Linear Accelerator Ctr, POB 20450, Stanford, CA 94309 USA. 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 0-7803-7738-9 PY 2003 BP 340 EP 344 DI 10.1109/PAC.2003.1288917 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600092 ER PT B AU Cai, YH Pivi, M Furman, M AF Cai, YH Pivi, M Furman, M BE Chew, J Lucas, P Webber, S TI Buildup of electron cloud with different bunch pattern in the presence of solenoid field SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB We have augmented the code POSINST to include solenoid fields, and used it to simulate the build up of electron cloud due to electron multipacting in the PEP-II positron ring. We find that the distribution of electrons is strongly affected by the resonances associated with the cyclotron period and bunch spacing. In addition, we discover a threshold beyond which the electron density grows exponentially until it reaches the space charge limit. The threshold does not depend on the bunch spacing but does depend on the positron bunch population. C1 SLAC, Menlo Pk, CA 94720 USA. RP Cai, YH (reprint author), SLAC, Menlo Pk, CA 94720 USA. NR 5 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 350 EP 352 DI 10.1109/PAC.2003.1288921 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600094 ER PT B AU Zisman, MS AF Zisman, MS BE Chew, J Lucas, P Webber, S TI R&D toward neutrino factories and muon colliders SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB R&D aimed at the production, acceleration, and storage of intense muon beams is under way in the U.S., in Europe, and in Japan. Considerable progress has been made in the past few years toward the design of a "Neutrino Factory" in which a beam of 20-50 GeV mu(-) or mu(+) is stored. Decay neutrinos from the beam illuminate a detector located roughly 3000 km from the ring. Here, we briefly describe the ingredients of a Neutrino Factory and then discuss the current R&D program and its results. A key concept in the design is "ionization cooling," a process whereby the muon emittance is reduced by repeated interactions with an absorber material followed by reacceleration with high-gradient rf cavities. Plans to test this concept in the Muon Ionization Cooling Experiment (MICE) are well along and are described briefly. C1 Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Zisman, MS (reprint author), Lawrence Berkeley Lab, Berkeley, CA 94720 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 0-7803-7738-9 PY 2003 BP 361 EP 365 DI 10.1109/PAC.2003.1288924 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600097 ER PT B AU Ptitsyn, V Kewisch, J Parker, B Peggs, S Trbojevic, D Berkaev, DE Koop, IA Otboev, AV Shatunov, YM Tschalaer, C van der Laan, JB Wang, F Barber, DP AF Ptitsyn, V Kewisch, J Parker, B Peggs, S Trbojevic, D Berkaev, DE Koop, IA Otboev, AV Shatunov, YM Tschalaer, C van der Laan, JB Wang, F Barber, DP BE Chew, J Lucas, P Webber, S TI Electron-ion collisions at RHIC using a high intensity self-polarizing electron ring SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB We consider the design of an electron-ion collider realized by adding a self-polarizing electron ring to the existing RHIC collider. It would provide polarized electron-proton and unpolarized electron-ion beam collisions in the center of mass energy range of 30-100 Gev and at luminosities up to 10(33) cm(-2)s(-1) for e-p and 10(31) cm(-2)s(-1) for e-Au collisions. An electron storage ring lattice has been developed which provides a short polarization time for an electron beam in the 5-10 GeV energy range and which satisfies the luminosity goals. We describe the modifications to the RHIC interaction region layout required for both efficient beam separation and also for longitudinal electron and proton beam polarization at the collision point. C1 BNL, Upton, NY USA. RP Ptitsyn, V (reprint author), BNL, Upton, NY USA. 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 BN 0-7803-7738-9 PY 2003 BP 372 EP 374 DI 10.1109/PAC.2003.1288927 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600100 ER PT B AU Fedotov, AV AF Fedotov, AV BE Chew, J Lucas, P Webber, S TI Resonances and beam loss in high intensity rings SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID CHARGE DOMINATED BEAMS; SPACE-CHARGE; FOCUSING CHANNEL; HALO FORMATION AB Operation of high-intensity rings requires minimal beam loss. Among numerous effects which contribute to losses in rings, the interplay of excited resonances is typically an unavoidable source of halo and beam loss. Such resonances can be driven by space charge itself, magnet errors or a combined effect of both. In this paper we review several resonant effects which can limit beam intensity in a circular machine. The space-charge limit and selection of a working point in the ring are also discussed. C1 BNL, Upton, NY 11973 USA. RP Fedotov, AV (reprint author), BNL, Upton, NY 11973 USA. NR 31 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 383 EP 387 DI 10.1109/PAC.2003.1288930 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600103 ER PT B AU Blaskiewicz, M Brennan, JM Cameron, P AF Blaskiewicz, M Brennan, JM Cameron, P BE Chew, J Lucas, P Webber, S TI Stochastic cooling studies in RHIC SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Emittance growth due to Intra-Beam Scattering significantly reduces the heavy ion luminosity lifetime in RHIC. Stochastic cooling of the stored beam could improve things considerably by counteracting IBS and preventing particles from escaping the rf bucket [1]. High frequency bunched-beam stochastic cooling is especially challenging but observations of Schottky signals in the 4-8 GHz band indicate that conditions are favorable in RHIC [2]. We report here on measurements of the longitudinal beam trans er function carried out with a pickup/kicker pair on loan from FNAL TEVATRON. Results imply that for ions a coasting beam description is applicable and we outline some general features of a viable momentum cooling system for RHIC. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Blaskiewicz, M (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 10 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 394 EP 396 DI 10.1109/PAC.2003.1288933 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600106 ER PT B AU Steier, C Forest, E Nadolski, L Nishimura, H Robin, D Wan, W Wu, Y Zholents, A AF Steier, C Forest, E Nadolski, L Nishimura, H Robin, D Wan, W Wu, Y Zholents, A BE Chew, J Lucas, P Webber, S TI Accelerator physics challenges of the fs-slicing upgrade at the ALS SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The goal of the Femtoslicing project at the ALS is to provide 100-200 fs long pulses of soft and hard x-rays with moderate flux and with a repetion rate of 10-40 kHz for experiments concerning ultrafast dynamics in solid state physics, chemistry and biology. The femtoslicing principle employs a femtosecond laser beam to interact resonantly (inverse FEL interaction) with the electron beam in the ALS. The induced energy spread over the femtosecond duration is converted to a transverse displacement by exploiting the dispersion of the storage ring. The displaced femtosecond electron pulse then radiates and produces femtosecond synchrotron radiation. To achieve the necessary spatial separation of the energy modulated slice from the rest of the bunch, a sizeable local vertical dispersion bump in the undulator used as radiator is required. This presents challenges in terms of the nonlinear dynamics and control of the vertical emittance. C1 LBNL, Berkeley, CA 94720 USA. RP Steier, C (reprint author), LBNL, Berkeley, CA 94720 USA. OI Nadolski, Laurent/0000-0003-1174-5940 NR 4 TC 4 Z9 4 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 397 EP 399 DI 10.1109/PAC.2003.1288934 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600107 ER PT B AU Ostroumov, PN AF Ostroumov, PN BE Chew, J Lucas, P Webber, S TI Heavy-ion beam dynamics in the rare isotope accelerator facility SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Recently the possibility of simulteniously accelerating particles with a range of charge-to-mass ratios (similar to20%) to the same energy was proposed and demonstrated for a superconducting (SC) linac [1]. This development has two immediate applications: 1) acceleration of heavy ions that are limited by ion-source intensities in a high-power medium energy linac such as the driver linac for the proposed Rare-Isotope Accelerator (RIA) Facility and 2) substantial intensity enhancement of secondary radioactive beams in post-accelerators. C1 Argonne Natl Lab, Phys Div, Argonne, IL 60439 USA. RP Ostroumov, PN (reprint author), Argonne Natl Lab, Phys Div, 9700 S Cass Ave, Argonne, IL 60439 USA. EM ostroumov@phy.anl.gov NR 16 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 400 EP 404 DI 10.1109/PAC.2003.1288935 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600108 ER PT B AU MacKay, WW Ahrens, L Bai, M Brown, K Courant, ED Glenn, JW Huang, H Luccio, AU Ptitsyn, V Roser, T Satogata, T Tepikian, S Tsoupas, N Zelenski, AN AF MacKay, WW Ahrens, L Bai, M Brown, K Courant, ED Glenn, JW Huang, H Luccio, AU Ptitsyn, V Roser, T Satogata, T Tepikian, S Tsoupas, N Zelenski, AN BE Chew, J Lucas, P Webber, S TI Spin dynamics in AGS and RHIC SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB A fundamental aspect of particle physics is the spin of the particles. With polarized beams, the internal structure of the proton may be probed in ways that are unattainable with unpolarized beams. The Relativistic Heavy Ion Col-lider (RHIC) has the unique capability of colliding protons with both transverse and longitudinal polarization at center-of-mass energies up to 500 GeV In this paper we examine the methods used to accelerate and manipulate polarized proton beams in RHIC and its injectors. Special techniques include the use of a partial Siberian snake and an ac dipole in the AGS. In RHIC we use four superconducting helical Siberian snakes (two per ring) for acceleration, and eight superconducting helical rotators for independent control of polarization directions at two interaction regions. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP MacKay, WW (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 5 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 405 EP 409 DI 10.1109/PAC.2003.1288936 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600109 ER PT B AU Lambertson, GR AF Lambertson, GR BE Chew, J Lucas, P Webber, S TI Beam dynamics in a storage ring for neutral (polar) molecules SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The force from a non-uniform electric field on the electric dipole moment of a molecule may be used to circulate and focus molecules in a storage ring. The nature of the forces from multipole electrodes for bending and focusing are described for strong-field-seeking and for weak-field-seeking molecules. Fringe-field forces are analyzed. Examples of storage ring designs are presented; these include long straight sections and provide bunching and acceleration. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Lambertson, GR (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, MS 71-159, Berkeley, CA 94720 USA. 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 BN 0-7803-7738-9 PY 2003 BP 410 EP 413 DI 10.1109/PAC.2003.1288937 PG 4 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600110 ER PT B AU Sajaev, V AF Sajaev, V BE Chew, J Lucas, P Webber, S TI Transverse impedance distribution measurements using the response matrix fit method at APS SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The Advanced Photon Source storage ring has a number of narrow-gap insertion device vacuum chambers, and there is a plan to further increase their number. These vacuum chambers contribute to the impedance of the machine and to the impedance limits the single-bunch current threshold. In order to understand the contribution of the vacuum chambers and its dependence on the gap, the distribution of the vertical transverse impedance around the circumference of the APS storage ring has been determined using the response matrix fit method. This method allows us to find focusing errors around the storage ring and was originally used to determine and correct the linear model of the APS. The high accuracy of the method enables us to measure the variation of betatron phase advance around the ring with beam current. Results of these measurements are reported and the impedance of different parts of the storage ring is presented. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Sajaev, V (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 8 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 417 EP 419 DI 10.1109/PAC.2003.1288939 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600112 ER PT B AU Wang, XJ Ihee, H AF Wang, XJ Ihee, H BE Chew, J Lucas, P Webber, S TI Femto-seconds electron beam diffraction using photocathode RF gun SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID RESOLUTION; OPTICS AB One of the 21(st) century scientific frontiers is to explore the molecule structure transition in the femto-second time scale. X-ray free electron laser (XFEL) is one of the tools now under development for investigating femto-second structure transition. We are proposing an alternative technique - femto-second electron diffraction based on the photocathode RF gun. We will present a design of a kHz femto-seconds electron diffraction system based on the photocathode RF gun. Our-simulation shows that, photocathode RF gun can produce 100 fs (FWHM) electron bunch with millions electrons at about 2 MeV. This is at least one order of magnitude reduction in bunch length, and two orders of magnitude increase in number of electrons comparing to present DC electron diffraction system. We will also discuss various issues and limitations related to MeV electron diffraction. C1 Brookhaven Natl Lab, NSLS, Upton, NY 11973 USA. RP Wang, XJ (reprint author), Brookhaven Natl Lab, NSLS, Upton, NY 11973 USA. NR 15 TC 7 Z9 7 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 420 EP 422 DI 10.1109/PAC.2003.1288940 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600113 ER PT B AU Krejcik, P Decker, FJ Emma, P Hacker, K Hendrickson, L Smith, H Stanek, M AF Krejcik, P Decker, FJ Emma, P Hacker, K Hendrickson, L Smith, H Stanek, M BE Chew, J Lucas, P Webber, S TI Commissioning of the SPPS linac bunch compressor SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB First results and beam measurements are presented for the recently installed linac bunch compressor chicane. The new bunch compressor produces ultra-short electron bunches for the Sub-Picosecond Photon Source (SPPS) and for test beams such as the E164 Plasma Wakefield experiment. This paper will give an overview of the first experiences with tuning and optimizing the compressor together with a description of the beam diagnostics and beam measurements. These measurements form the basis for further detailed study of emittance growth effects such as CSR and wakefields in a previously unmeasured regime of ultra-short bunch lengths. C1 SLAC, Menlo Pk, CA 94025 USA. RP Krejcik, P (reprint author), SLAC, Menlo Pk, CA 94025 USA. NR 8 TC 11 Z9 11 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 423 EP 425 DI 10.1109/PAC.2003.1288941 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600114 ER PT B AU Weng, WT Diwan, MV AF Weng, WT Diwan, MV BE Chew, J Lucas, P Webber, S TI Neutrino beam facilities and projects SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Neutrino oscillations have been firmly established by the experimental results on Atmospheric and Solar neutrinos. As impressive as the results from these experiments are, it is clear that we are just getting started on a long-term experimental program to understand neutrino masses, mixing, and possibly leptonic CP violation. Many new facilities and experiments are underway to explore the detailed oscillation mechanism for comparison with theoretical predictions. Also, further improvements on neutrino oscillations using a muon storage ring based on Neutrino Factory will be covered. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Weng, WT (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM weng@bnl.gov NR 14 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 429 EP 433 DI 10.1109/PAC.2003.1288943 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600116 ER PT B AU Edwards, H AF Edwards, H BE Chew, J Lucas, P Webber, S TI RF superconductivity: Enabling technology for the future SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB It has been my good fortune to work for two directors, Bob Wilson and Bjoern Wiik, who had vision on directions of future accelerator technology. In 1992, Bjoern Wiik, soon to become Director of DESY, organized an international effort dedicated to a dramatic improvement in performance and cost of accelerating structures based on RF superconductivity. In this paper I will discuss the degree to which this goal has been achieved and the accompanying technology advances. Today, RF superconductivity is the technology of choice for high duty factor, high beam brightness applications and a serious competitor for use in a linear collider. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Edwards, H (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. 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 0-7803-7738-9 PY 2003 BP 447 EP 451 DI 10.1109/PAC.2003.1288947 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600120 ER PT B AU Preble, J Campisi, IE Daly, E Davis, GK Delayen, JR Drury, M Grenoble, C Hogan, J King, L Kneisel, P Mammosser, J Powers, T Stirbet, M Wang, H Whitlatch, T Wiseman, M AF Preble, J Campisi, IE Daly, E Davis, GK Delayen, JR Drury, M Grenoble, C Hogan, J King, L Kneisel, P Mammosser, J Powers, T Stirbet, M Wang, H Whitlatch, T Wiseman, M BE Chew, J Lucas, P Webber, S TI SNS cryomodule performance SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Thomas Jefferson National Accelerating Facility, Jefferson Lab, is producing 24 Superconducting Radio Frequency (SRF) cryomodules for the Spallation Neutron Source (SNS) cold linac. This includes one medium-P (0.61) prototype, 11 medium-beta production, and 12 high beta (0.81) production cryomodules. After testing [1], the medium-beta prototype cryomodule was shipped to Oak Ridge National Laboratory (ORNL) and acceptance check out has been completed. All production orders for cavities and cryomodule components are being received at this time and the medium-P cryomodule production run has started. Each of the medium-P cryomodules is scheduled to undergo complete operational performance testing at Jefferson Laboratory before shipment to ORNL. The performance results of cryomodules to date will be discussed. C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Preble, J (reprint author), Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. NR 5 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 457 EP 461 DI 10.1109/PAC.2003.1288949 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600122 ER PT B AU Brennan, JM Blaskiewicz, M DeLong, J Fischer, W Hayes, T Smith, KS Zaltsman, A AF Brennan, JM Blaskiewicz, M DeLong, J Fischer, W Hayes, T Smith, KS Zaltsman, A BE Chew, J Lucas, P Webber, S TI Operation of the RHIC RF systems SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Operational aspects of the RHIC rf system are described. To date three different beam combinations have been collided for physics production: gold-gold, deuteron-gold, and proton-proton(polarized).[ 1,2] To facilitate this flexibility the rf systems of the two rings are independent and self-sufficient. [3] Techniques to cope with problems such as, injection/capture, beam loading, bunch shortening, and rf noise have evolved and are explained. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Brennan, JM (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. 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 0-7803-7738-9 PY 2003 BP 476 EP 478 DI 10.1109/PAC.2003.1288954 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600127 ER PT B AU Tantawi, S Nantista, C AF Tantawi, S Nantista, C BE Chew, J Lucas, P Webber, S TI High power tests of a multimode X-band RF distribution system SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID RESONANT DELAY-LINES AB We present a multimode X-band rf pulse compression system suitable for the Next Linear Collider (NLC). The NLC main linacs operate at 11.424 GHz. A single NLC rf unit is required which produce 400 ns pulses with 600 MW of peak power. Each rf unit should power approximately 5 meters of accelerator structures. These rf units consist of two 75 MW klystrons and a dualmoded resonant delay line pulse compression system [1] that produce a flat output pulse. The pulse compression system components are all over moded and most components are design to operate with two modes at the same time. This approach allows increasing the power handling capabilities of the system while maintain a compact inexpensive system. We detail the design of this system and present experimental cold test results. The high power testing of the system is verified using four 50-MW solenoid focused klystrons. These Klystrons should be able to push the system beyond NLC requirements. C1 SLAC, Menlo Pk, CA 94025 USA. RP Tantawi, S (reprint author), SLAC, Menlo Pk, CA 94025 USA. 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 0-7803-7738-9 PY 2003 BP 482 EP 486 DI 10.1109/PAC.2003.1288956 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600129 ER PT B AU Power, JG Gai, W Konecny, R Jing, C Liu, W Gold, SH Kinkead, AK AF Power, JG Gai, W Konecny, R Jing, C Liu, W Gold, SH Kinkead, AK BE Chew, J Lucas, P Webber, S TI High power testing of X-band dielectric-loaded accelerating structures SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB A program is under way at Argonne National Laboratory, in collaboration with the Naval Research Laboratory (NRL), to develop RF-driven dielectric-loaded accelerating (DLA) structures, with the ultimate goal of demonstrating a compact, high-gradient linear accelerator based on this technology. In this paper, we report on the most recent results from a series of high power tests that are under way at NRL's X-band Magnicon facility. The design of the latest DLA structure has been fundamentally changed from the previous generation; it now has a modular construction that separates the RF coupler from the dielectric section. In this paper we present a detailed description of the design of the new structure and of the experimental setup used during the high power tests. In addition, we will report on experimental results of high power tests carried out on an alumina-based (epsilon=9.4) DLA structure. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Power, JG (reprint author), Argonne Natl Lab, Argonne, IL 60439 USA. NR 5 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 492 EP 494 DI 10.1109/PAC.2003.1288958 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600131 ER PT B AU Assadi, S AF Assadi, S CA SNS diagnostic collaboration BE Chew, J Lucas, P Webber, S TI The Spallation Neutron Source diagnostics: Initial integration and commissioning progress report SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The Spallation Neutron Source (SNS) Project, a collaboration of six national laboratories, is constructing an accelerator based neutron facility at ORNL. The SNS accelerator systems will deliver a 1 GeV, 1.44 MW proton beam to a liquid mercury target. The high-beam power and desired high availability of the accelerator complex have had important consequences for the design and implementation of diagnostics at the SNS. Namely, diagnostic systems have been designed with high reliability, the ability for hands-on maintenance, redundancy in critical diagnostics, and commonality of subsystems in mind. The multi-laboratory diagnostics group has successfully implemented and commissioned a number of systems at LBNL during initial commissioning of the SNS Front-End systems. This talk reports on the team's progress in diagnostics commissioning and performance for the SNS, summarizes the approach that has been used in this multi-laboratory effort, describes the lessons learned and presents the technical and organizational challenges that lie ahead. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Assadi, S (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. 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 0-7803-7738-9 PY 2003 BP 498 EP 502 DI 10.1109/PAC.2003.1288960 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600133 ER PT B AU Ross, M AF Ross, M BE Chew, J Lucas, P Webber, S TI Laser-based profile monitor for electron beams SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB High performance TeV energy electron / positron colliders (LC) are the first machines to require online, non-invasive beam size monitors for micron and sub-micron for beam phase space optimization. Typical beam densities in the LC are well beyond the threshold density for single pulse melting and vaporization of any material, making conventional wire scanners ineffective. Using a finely focused, diffraction limited high power laser, it is possible to devise a sampling profile monitor that, in operation, resembles a wire scanner. Very high resolution laser-based profile monitors have been developed and tested, first at FFTB (SLAC) and later at SLC and ATE The monitor has broad applicability and we review here the technology, application and status of ongoing research programs. C1 SLAC, Stanford, CA 94025 USA. RP Ross, M (reprint author), SLAC, Stanford, CA 94025 USA. NR 19 TC 2 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 503 EP 507 DI 10.1109/PAC.2003.1288961 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600134 ER PT B AU Macek, RJ Browman, A Borden, M Fitzgerald, D Wang, TS Zaugg, T Harkay, K Rosenberg, R AF Macek, RJ Browman, A Borden, M Fitzgerald, D Wang, TS Zaugg, T Harkay, K Rosenberg, R BE Chew, J Lucas, P Webber, S TI Electron cloud diagnostics in use at the Los Alamos PSR SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB A variety of electron cloud diagnostics have been deployed at the Los Alamos Proton Storage Ring (PSR) to detect, measure, and characterize the electron cloud generated in this high intensity, long bunch accumulator ring. These include a version of the ANL-developed retarding field analyzers (RFA) augmented with LANL-developed electronics, a variant of the RFA denoted as the electron sweeping diagnostic (ESD), biased collection plates, and gas pulse measuring devices. The designs and experience with the performance and applicability to PSR are discussed. C1 LANL, Los Alamos, NM 87545 USA. RP Macek, RJ (reprint author), LANL, Los Alamos, NM 87545 USA. NR 5 TC 7 Z9 7 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 508 EP 510 DI 10.1109/PAC.2003.1288962 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600135 ER PT B AU Bhat, CM Marriner, JP AF Bhat, CM Marriner, JP BE Chew, J Lucas, P Webber, S TI Longitudinal emittance measurements in the Fermilab Recycler Ring SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID RF SYSTEMS AB The Recycler Ring (RR) is a new 8GeV antiproton storage ring at Fermilab. Presently, this machine is being commissioned using protons from the Booster. It uses barrier buckets for stacking, un-stacking and storing the beam. At any given time, the RR is capable of storing proton or antiproton beams in multiple segments azimuthally. These segments of the beam may have widely differing longitudinal emittance and beam intensities and bunch lengths. It is highly essential to be able to measure the longitudinal emittance and keep track of the longitudinal dynamics at various stages of the operation of the RR. In this paper, we discuss a few methods of longitudinal emittance measurements in barrier buckets and discuss their merits and demerits. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Bhat, CM (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 9 TC 2 Z9 2 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 514 EP 518 DI 10.1109/PAC.2003.1288964 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600137 ER PT B AU Cameron, P Cupolo, J Dawson, W Degen, C DellaPenna, A Kesselman, M Marusic, A Mead, J Schultheiss, C Sikora, R Vetter, K Van Zeijts, J AF Cameron, P Cupolo, J Dawson, W Degen, C DellaPenna, A Kesselman, M Marusic, A Mead, J Schultheiss, C Sikora, R Vetter, K Van Zeijts, J BE Chew, J Lucas, P Webber, S TI RHIC third generation PLL tune system SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB During the RHIC 2000 run a prototype PLL tune measurement system was implemented using commercial off-the-shelf hardware. To meet the requirements for tune feedback during RHIC 2001/2002, this system was migrated into RHIC BPM modules, whose flexible DSP/FPGA architecture permitted the specialized processing needed for tune tracking and feedback during acceleration, and whose existing firewire interface provided communication with the Control System. For RHIC 2003 this system has migrated yet again, to stateof-the-art DSPs in VME. We report here on various improvements, extending from the pickup through the analog electronics and digital processing into the Controls interface, and on the performance gains that resulted from these improvements. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Cameron, P (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 5 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 524 EP 526 DI 10.1109/PAC.2003.1288966 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600139 ER PT B AU Stockli, MP Welton, RF Keller, R AF Stockli, MP Welton, RF Keller, R BE Chew, J Lucas, P Webber, S TI Self-consistent, unbiased exclusion methods of emittance analysis SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB We present a self-consistent method for analyzing measured emittance data that yields unbiased estimates for the rms emittance as well as its associated uncertainty. The self-consistent, unbiased elliptical exclusion analysis, SCUBEEx, uses an exclusion ellipse to determine the bias from the data outside the ellipse, before calculating the emittance from the bias-subtracted data within the ellipse. Variations of the ellipse size, shape, and orientation allow for objectively estimating the bias and the rms emittance. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. RP Stockli, MP (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37830 USA. NR 3 TC 1 Z9 1 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 527 EP 529 DI 10.1109/PAC.2003.1288967 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600140 ER PT B AU Smedley, J Srinivasan-Rao, T Tsang, T Farrell, JP Batchelor, K AF Smedley, J Srinivasan-Rao, T Tsang, T Farrell, JP Batchelor, K BE Chew, J Lucas, P Webber, S TI Emittance measurements with a pulsed power photoinjector SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB This paper describes measurements of beam spot size and emittance of electron beams from a pulsed power photo-injector operating at 150keV output energy. In these measurements, electron bunches with charge up to 20 pC were created by a 300 fs pulse duration Ti: Sapphire laser system illuminating a polished copper cathode. Images of the electron beam were captured at two locations downstream from a solenoid focusing magnet. The focal spot size was studied as a function of bunch charge and accelerating gradient. Beam waists down to 85 microns were obtained. The focal spot size was found to be dominated by spherical aberration at low beam charges, however the beam trajectory is in good agreement with simulation. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Smedley, J (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 5 TC 1 Z9 1 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 541 EP 543 DI 10.1109/PAC.2003.1288971 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600144 ER PT B AU Cook, EG Walstrom, PL AF Cook, EG Walstrom, PL BE Chew, J Lucas, P Webber, S TI A 50 W solid state multipulse kicker modulator SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Performance requirements, design concepts, and test results for a prototype multipulse kicker modulator based on solid-state switches and a voltage-adding transformer topology are described. Tape-wound cores are stacked to form the transformer primary windings and a cylindrical pipe that passes through the circular inner diameters of the cores serves as the secondary winding of the step-up transformer. Boards containing MOSFET switches, trigger circuitry, and energy-storage capacitors plug into the core housings. A 50 W prototype modulator that meets most of the facility requirements has been designed, fabricated, and tested at LLNL. More recent work has been concerned with designing and testing cores and boards with the full volt-second capability needed for 24-pulse operation. Results of the 50 W prototype tests, preliminary tests of the full-volt-second cores and boards, and future development needs are described. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Cook, EG (reprint author), Lawrence Livermore Natl Lab, POB 5508, 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 BN 0-7803-7738-9 PY 2003 BP 544 EP 546 DI 10.1109/PAC.2003.1288972 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600145 ER PT B AU Zhang, W Sandberg, J Lambiase, R Lee, YY Lockey, R Mi, J Nehring, T Pai, C Tsoupas, N Tuozzolo, J Warburton, D Wei, J Rust, K Cutler, R AF Zhang, W Sandberg, J Lambiase, R Lee, YY Lockey, R Mi, J Nehring, T Pai, C Tsoupas, N Tuozzolo, J Warburton, D Wei, J Rust, K Cutler, R BE Chew, J Lucas, P Webber, S TI Design, development, and construction of SNS extraction fast kicker system SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The SNS accumulator ring extraction fast-kicker system was design, developed, and prototype tested at the Brookhaven National Laboratory. Its construction has just begun. The system is for one-turn fast extraction ejecting proton beam from the ring into the extraction septum gap and further deflecting into the ring-to-target beam transport line. The system consists of fourteen high-voltage modulators, their local control and auxiliary systems, and fourteen window frame magnet sections. High-voltage transmission cables will be used for pulse transmission from modulators to their corresponding magnet sections. The high-voltage and high-current pulse has a rise time about 200 ns, a pulse duration about 700 ns, and a current amplitude above 2500 Amp per modulator. The modulator design features a Blumlein Pulse-Forming-Network with ultra-low inductance high energy storage pulsed capacitors, an ultra-fast high-power hollow anode thyratron, a parallel resistor stack for low beam-impedance termination, and a saturable inductor stack for beam current isolation and pulse rise time sharpening. This design is driven by the considerations of low beam loss, high maintainability and reliability. All high voltage modulators will be placed outside the ring tunnel and the system is immune to one-kicker failure. In addition, the enlarged magnet aperture can accept all four working points. The design concept has been successfully proven by the prototype test. The techniques, considerations, and other related issues of the system design, development and construction are discussed in this paper. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Zhang, W (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. RI Lambiase, Robert/E-1934-2013 NR 5 TC 1 Z9 1 U1 1 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 550 EP 552 DI 10.1109/PAC.2003.1288974 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600147 ER PT B AU Reass, WA Apgar, SE Baca, DM Borovina, DL Bradley, JT Doss, JD Gonzales, JM Gribble, RF Hardek, TW Lynch, MT Rees, DE Tallerico, PJ Trujillo, PG Anderson, DE Heidenreich, DA Hicks, JD Leontiev, VN AF Reass, WA Apgar, SE Baca, DM Borovina, DL Bradley, JT Doss, JD Gonzales, JM Gribble, RF Hardek, TW Lynch, MT Rees, DE Tallerico, PJ Trujillo, PG Anderson, DE Heidenreich, DA Hicks, JD Leontiev, VN BE Chew, J Lucas, P Webber, S TI Design, status, and first operations of the Spallation Neutron Source polyphase resonant converter modulator system SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The Spallation Neutron Source (SNS) is a new 1.4 MW average power beam, 1 GeV accelerator being built at Oak Ridge National Laboratory. The accelerator requires 15 converter-modulator stations each providing between 9 and 11 MW pulses with up to a 1.1 MW average power. The converter-modulator can be described as a resonant 20 kHz polyphase boost inverter. Each converter modulator derives its buss voltage from a standard substation cast-core transformer. Each substation is followed by an SCR pre-regulator to accommodate voltage changes from no load to full load, in addition to providing a soft-start function. Energy storage is provided by self-clearing metallized hazy polypropylene traction capacitors. These capacitors do not fail short, but clear any internal anomaly. Three "H-Bridge" IGBT transistor networks are used to generate the polyphase 20 kHz transformer primary drive waveforms. The 20 kHz drive waveforms are time-gated to generate the desired klystron pulse width. Pulse width modulation of the individual 20 kHz pulses is utilized to provide regulated output waveforms with DSP based adaptive feedforward and feedback techniques. The boost transformer design utilizes nanocrystalline alloy that provides low core loss at design flux levels and switching frequencies. Capacitors are used on the transformer secondary networks to resonate the leakage inductance. The transformers are wound for a specific leakage inductance, not turns ratio. This design technique generates multiple secondary volts per turn as compared to the primary. With the appropriate tuning conditions, switching losses are minimized. The resonant topology has the added benefit of being deQed in a klystron fault condition, with little energy deposited in the arc. This obviates the need of crowbars or other related networks. A review of these design parameters, operational performance, production status, and ORNL installation and performance to date will be presented. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Reass, WA (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 0 TC 3 Z9 3 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 553 EP 557 DI 10.1109/PAC.2003.1288975 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600148 ER PT B AU Ekdahl, C Abeyta, EO Caudill, L Chan, KCD Dalmas, D Eversole, S Gallegos, R Harrison, J Holzscheiter, M Johnson, J Jacquez, E McCuistian, BT Montoya, N Nielsen, K Oro, D Rodriguez, L Rodriguez, P Sanchez, M Schauer, M Simmons, D Smith, HV Studebaker, J Sullivan, G Swinney, C Temple, R Chen, YJ Houck, T Henestroza, E Eylon, S Fawley, W Yu, SS Bender, H Broste, W Carlson, C Durtschi, G Frayer, D Johnson, D Jones, K Meidinger, A Moy, K Sturgess, R Tom, CY Hughes, T Mostrom, C AF Ekdahl, C Abeyta, EO Caudill, L Chan, KCD Dalmas, D Eversole, S Gallegos, R Harrison, J Holzscheiter, M Johnson, J Jacquez, E McCuistian, BT Montoya, N Nielsen, K Oro, D Rodriguez, L Rodriguez, P Sanchez, M Schauer, M Simmons, D Smith, HV Studebaker, J Sullivan, G Swinney, C Temple, R Chen, YJ Houck, T Henestroza, E Eylon, S Fawley, W Yu, SS Bender, H Broste, W Carlson, C Durtschi, G Frayer, D Johnson, D Jones, K Meidinger, A Moy, K Sturgess, R Tom, CY Hughes, T Mostrom, C BE Chew, J Lucas, P Webber, S TI First beam at DARHT-II SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID INTENSE ELECTRON-BEAM AB The second axis of the Dual Axis Radiographic Hydro-Test (DARRT) facility will provide up to four short (< 150 ns) radiation pulses for flash radiography of high-explosive driven implosion experiments[1]. To accomplish this the DARHT-II linear induction accelerator (LIA) will produce a 2-kA electron beam with 18-MeV kinetic energy, constant to within +/-0.5% for 2mus. A fast kicker will cleave four short pulses out of the 2mus flattop, with the bulk of the beam diverted into a dump. The short pulses will then be transported to the final-focus magnet, and focused onto a tantalum target for conversion to bremsstrahlung pulses for radiography. DARHT-II is a collaborative effort between the Los Alamos, Lawrence Livermore, and Lawrence Berkeley National Laboratories of the University of California. C1 LANL, Los Alamos, NM 87545 USA. RP Ekdahl, C (reprint author), LANL, POB 1663, Los Alamos, NM 87545 USA. NR 9 TC 4 Z9 4 U1 2 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 558 EP 562 DI 10.1109/PAC.2003.1288976 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600149 ER PT B AU McCarrick, J Caporaso, G Chambers, F Chen, YJ Falabella, S Goldin, F Guethlein, G Ho, D Richardson, R Weir, J AF McCarrick, J Caporaso, G Chambers, F Chen, YJ Falabella, S Goldin, F Guethlein, G Ho, D Richardson, R Weir, J BE Chew, J Lucas, P Webber, S TI Electron beam/converter target interactions in radiographic accelerators SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Linear induction accelerators used in X-ray radiography have single-pulse parameters of the order 20 MeV of electron beam energy, 2 kA of beam current, pulse lengths of 50-100 ns, and spot sizes of 1-2 mm. The thermal energy deposited in a bremsstrahlung converter target made of tantalum from such a pulse is similar to80 kJ/cc, more than enough to bring the target material to a partially ionized state. The tail end of a single beam pulse, or any subsequent pulse in a multi-pulse train, undergoes a number of interactions with the target that can affect beam transport and radiographic performance. Positive ions extracted from the target plasma by the electron beam space charge can affect the beam focus and centroid stability. As the target expands on the inter-pulse time scale, the integrated line density of material decreases, eventually affecting the X-ray output of the system. If the target plume becomes sufficiently large, beam transport through it is affected by macroscopic charge and current neutralization effects and microscopic beam/plasma instability mechanisms. We will present a survey of some of these interactions, as well as some results of an extensive experimental and theoretical campaign to understand the practical amelioration of these effects, carried out at the ETA-II accelerator facility at the Lawrence Livermore National Laboratory. C1 LLNL, Livermore, CA 94551 USA. RP McCarrick, J (reprint author), LLNL, Livermore, CA 94551 USA. 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 0-7803-7738-9 PY 2003 BP 563 EP 567 DI 10.1109/PAC.2003.1288977 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600150 ER PT B AU Shepard, KW AF Shepard, KW BE Chew, J Lucas, P Webber, S TI Status of low and intermediate velocity superconducting accelerating structures SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Several types of reduced velocity (0.1 - 0.6c) superconducting accelerating structures are being developed for ion linacs to be used for spallation sources, exotic beam facilities, and other applications. This paper briefly reviews the characteristics and development status of some of the cavity types currently under development. Two different structure choices for the high-energy section of the proposed RIA driver linac are discussed. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Shepard, KW (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 13 TC 1 Z9 1 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 581 EP 585 DI 10.1109/PAC.2003.1288981 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600154 ER PT B AU Harwood, L AF Harwood, L CA JLab 12 GeV dev team BE Chew, J Lucas, P Webber, S TI Upgrading CEBAF to 12 GeV SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB As originally constructed, the Continuous Electron Beam Accelerator Facility (CEBAF) was a 4 GeV cw 5-pass recirculating linac. It has subsequently been enhanced to 5.7 GeV. Developments in lattice QCD have indicated that an extending CEBAF to 12 GeV would provide a unique opportunity to understand quark confinement. Jefferson Lab plans to reach 12 GeV by adding ten new 100 MV cryomodules and supporting rf systems to the present machine configuration. The 2K helium plant will be doubled. The beam transport system's capability will be doubled to 12 GeV with minimal replacement of components and with minimal saturation in the magnets. A new experimental hall, devoted to the quark confinement investigation, will be placed so that the beam transits one of the linacs 6 times (vs 5 times for the other linac). Beam emittances are degraded by synchrotron radiation such that the horizontal emittance of 1 nm-rad at 6 GeV increases to 7 nm-rad at 12 GeV. This paper discusses the issues listed above plus requirements for all systems and developmental opportunities presented by the project. C1 TJNAF, Newport News, VA 23606 USA. RP Harwood, L (reprint author), TJNAF, Newport News, VA 23606 USA. NR 3 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 586 EP 588 DI 10.1109/PAC.2003.1288982 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600155 ER PT B AU Dooling, JC Brumwell, FR Czyz, WS Harkay, KC Lien, MK McMichael, GE AF Dooling, JC Brumwell, FR Czyz, WS Harkay, KC Lien, MK McMichael, GE BE Chew, J Lucas, P Webber, S TI Observations of electrons in the intense pulse neutron source (IPNS) rapid cycling synchrotron (RCS) SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB In the process of accelerating protons from 50 to 450 MeV at 30 Hz, low-energy electrons are generated within the IPNS RCS vacuum chamber. Electrons from background gas stripping are detected using an Ionization Profile Monitor (IPM) to generate integrated, horizontal charge distributions of the single-harmonic bunch during acceleration. Recently, a Retarding Field Analyzer (RFA) was installed in the RCS to look for evidence of beam-induced multipacting by measuring the electrons ejected by the space charge of the beam. A wide-band, high-gain transimpedance amplifier has been built to observe time structure in the electron signal detected with the RFA. Though a noisy power supply prevented full I-V characteristics from being obtained, interesting features are observed; especially, after the period of phase modulation between the rf cavities that is deliberately introduced during the cycle. The phase modulation generates a longitudinal quadrupole oscillation in the bunch, which is believed to enhance beam stability. Preliminary results indicate that electron multipacting is not significant in the RCS. The effects of background gas neutralization are considered and details of the RFA measurements are presented. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Dooling, JC (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM jcdooling@anl.gov NR 11 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 592 EP 594 DI 10.1109/PAC.2003.1288984 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600157 ER PT B AU Chou, W AF Chou, W CA Proton Driver Study II Grp BE Chew, J Lucas, P Webber, S TI 2 MW upgrade of the Fermilab Main Injector SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB In January 2002, the Fermilab Director initiated a design study for a high average power, modest energy proton facility. An intensity upgrade to Fermilab's 120-GeV Main Injector (MI) represents an attractive concept for such a facility, which would leverage existing beam lines and experimental areas and would greatly enhance physics opportunities at Fermilab and in the U.S. With a Proton Driver replacing the present Booster, the beam intensity of the MI is expected to be increased by a factor of five. Accompanied by a shorter cycle, the beam power would reach 2 MW. This would make the MI a more powerful machine than the SNS or the J-PARC. Moreover, the high beam energy (120 GeV) and tunable energy range (8 - 120 GeV) would make it a unique high power proton facility. The upgrade study has been completed and published [1]. This paper gives a summary report. C1 Fermilab Natl Accelerator Lab, Proton Driver Study 2 Grp, Batavia, IL 60510 USA. RP Chou, W (reprint author), Fermilab Natl Accelerator Lab, Proton Driver Study 2 Grp, POB 500, Batavia, IL 60510 USA. 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 0-7803-7738-9 PY 2003 BP 604 EP 606 DI 10.1109/PAC.2003.1288988 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600161 ER PT B AU Sibley, C AF Sibley, C BE Chew, J Lucas, P Webber, S TI Machine protection strategies for high power accelerators SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The Machine Protection System Requirements for a number of accelerators have been reviewed. The specific requirements vary depending on the type of machine, beam power, pulse length, etc. Some system concepts are common to a number of accelerators and these systems will be discussed. The Machine Protection System (MPS) must protect beam apertures and insertable devices from damage, minimize radiation produced by the beam (ALARA) for hands on maintenance, and shut down the beam when beam-on-target parameters drift outside specifications. NIPS systems should be used as an Accelerator diagnostic. NIPS can trigger data acquisition when a fault occurs, and start post mortem applications automatically. Tight integration with timing and other systems allows automatic recovery from beam faults. * SNS is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy C1 Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. RP Sibley, C (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. NR 11 TC 0 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 607 EP 611 DI 10.1109/PAC.2003.1288989 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600162 ER PT B AU Shaw, RW Herr, AD Feigerle, CS Cutler, RI Liaw, CJ Lee, YY AF Shaw, RW Herr, AD Feigerle, CS Cutler, RI Liaw, CJ Lee, YY BE Chew, J Lucas, P Webber, S TI Thin diamond films for SNSH- injection stripping SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID MICROWAVE PLASMA AB We have investigated the preparation and testing of thin diamond foils for use in stripping the SNS H- Linac beam. A long useful lifetime for these foils is desirable to improve operational efficiency. Preliminary data presented at PAC 2001 indicated that diamond foils were superior to conventional evaporated carbon foils, exhibiting lifetimes approximately five-fold longer[1]. That work employed a fully supported diamond foil, a format that is not acceptable for the SNS application; at least two edges of the approximately 1x1 cm foils must be free standing to allow for beam rastering. Residual stress in a chemical vapor deposited (CVD) diamond foil results in film distortion (scrolling) when the film is released from its silicon growth substrate. We have attacked this problem by initially patterning the surface of CVD growth substrates with a 50 or 100 line/inch trapezoidal grating, followed by conformal diamond film growth on the patterned substrate. Then removal of the substrate by chemical etching produced a foil that possessed improved mechanical integrity due to its corrugation. The high nucleation density required to grow continuous, pinhole free diamond foils of the desired thickness (1 mum, 350 mug/cm(2)) was achieved by a combination of substrate surface scratching and seeding. A variety of diamond foils have been tested using the BNL 750 keV Radio Frequency Quadrupole H- beam to simulate energy loss in the SNS. Those include flat, corrugated, microcrystalline, and nanocrystalline foils. Foil lifetimes are reported. C1 Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. RP Shaw, RW (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. NR 6 TC 4 Z9 4 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 617 EP 619 DI 10.1109/PAC.2003.1288991 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600164 ER PT B AU Suhring, S AF Suhring, S BE Chew, J Lucas, P Webber, S TI Accelerator availability and reliability issues SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Maintaining reliable machine operations for existing machines as well as planning for future machines' operability present significant challenges to those responsible for system performance and improvement. Changes to machine requirements and beam specifications often reduce overall machine availability in an effort to meet user needs. Accelerator reliability issues from around the world will be presented, followed by a discussion of the major factors influencing machine availability. C1 Jefferson Lab, Newport News, VA 23606 USA. RP Suhring, S (reprint author), Jefferson Lab, Newport News, VA 23606 USA. NR 23 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 625 EP 629 DI 10.1109/PAC.2003.1288994 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600167 ER PT B AU Dortwegt, R AF Dortwegt, R BE Chew, J Lucas, P Webber, S TI Low-conductivity water systems for accelerators SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The performance of low-conductivity water (LCW) systems is of critical importance at accelerator facilities. An imbalance of water chemistry, supply temperature, or component availability can have a direct impact on machine performance. Downtime of the LCW system for any reason can result in downtime of the entire accelerator. LCW systems for copper components are similar to stator cooling systems for electric power generating equipment with respect to the chemistry of soluble copper and resultant corrosion. The basics of copper corrosion and agglomeration mechanisms, impact of dissolved oxygen concentration and pH, copper solubility data and its relationship with temperature, and relative corrosion rates for various possible operating regimes are available from existing literature and will be reviewed. Water treatment for aluminum LCW systems is different than for copper systems and will be outlined. Fundamental features of control systems capable of controlling LCW temperatures within a fraction of a degree will also be discussed. Operational reliability is very much related to system design, component selection, and operating practices, and some anecdotal information will be offered based on the author's experience. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Dortwegt, R (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. NR 13 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 630 EP 634 DI 10.1109/PAC.2003.1288995 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600168 ER PT B AU Rust, WW AF Rust, WW BE Chew, J Lucas, P Webber, S TI Accelerator magnet plugging by metal oxides: A theoretical investigation, remediation and preliminary results SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The Thomas Jefferson National Accelerator Facility has experienced magnet overheating at high power. Overheating is caused by cooling water passages becoming plugged and is a direct result of the Dean Effect deposition of corrosion products suspended in the water. Solving simplified dynamic model equations of the flow in the magnet tubing bends yielded a relationship for plugging rate as a function of particle size, concentration, velocity, channel width and bend radius. Calculated deposition rates using data from a previous study are promising. Remediation has consisted of submicron filtration, magnet cleaning, and dissolved oxygen removal. Preliminary results are good: no accelerator outages have been attributed to magnet plugging since the remediation has been completed. C1 TJNAF, Newport News, VA 23606 USA. RP Rust, WW (reprint author), TJNAF, Newport News, VA 23606 USA. 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 0-7803-7738-9 PY 2003 BP 635 EP 637 DI 10.1109/PAC.2003.1288996 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600169 ER PT B AU Loew, GA AF Loew, GA BE Chew, J Lucas, P Webber, S TI Report from the International Linear Collider Technical Review Committee SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The International Linear Collider Technical Review Committee (ILC-TRC), formed in 1994, was reconvened in February 2001 by the International Committee for Future Accelerators (ICFA) to assess the current technical status of all electron-positron linear collider designs at hand in the world: TESLA, JLC-C, JLC-X/NLC and CLIC. The ILC-TRC worked for exactly two years and submitted its report to ICFA in February 2003. This paper presents the motivation behind the study, the charge to the committee and its organization, a table of machine parameters for 500 GeV c.m. energy and later upgrades to higher energies, the methodology used to assess the designs, and a ranked list of R&D tasks still deemed necessary between now and the time any one of the projects is selected by the HEP community and begins construction. Possible future developments are briefly discussed. C1 SLAC, Menlo Pk, CA 94025 USA. RP Loew, GA (reprint author), SLAC, Menlo Pk, CA 94025 USA. NR 0 TC 1 Z9 1 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 647 EP 651 DI 10.1109/PAC.2003.1289000 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600173 ER PT B AU Wolski, A Decking, W AF Wolski, A Decking, W BE Chew, J Lucas, P Webber, S TI Damping ring designs and issues SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The luminosity performance of a future linear collider (LC) will depend critically on the performance of the damping rings. The design luminosities of the current LC proposals require rings with very short damping times, large acceptance, low equilibrium emittance and high beam intensity. We discuss the design strategies for lattices achieving the goals of dynamical stability, examine the challenges for alignment and coupling correction, and consider a variety of collective effects that threaten to limit beam quality. We put the design goals in context by referring to the experience of operating facilities, and outline the further research and development that is needed. C1 LBNL, Berkeley, CA 94720 USA. RP Wolski, A (reprint author), LBNL, Berkeley, CA 94720 USA. OI Wolski, Andrzej/0000-0002-5057-5588 NR 24 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 652 EP 656 DI 10.1109/PAC.2003.1289001 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600174 ER PT B AU Seryi, A Hendrickson, L Raubenheimer, TO Tenenbaum, P Woodley, M Schulte, D AF Seryi, A Hendrickson, L Raubenheimer, TO Tenenbaum, P Woodley, M Schulte, D BE Chew, J Lucas, P Webber, S TI Effects of dynamic misalignments and feedback performance on luminosity stability in linear colliders SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The performance of high energy linear colliders depends critically on the stability with which they can maintain the collisions of nanometer-size beams. Ground motion and vibration, among other effects, will produce dynamic misalignments which can offset the beams at the collision point. A system of train-to-train and intra-train beam-beam feedbacks, possibly combined with additional beam-independent active systems, is planned to compensate for these effects. Extensive simulation studies of ground motion and luminosity stabilization have been performed as part of the work of the International Linear Collider Technical Review Committee [1]. This paper presents a comparison of the expected performance for TESLA, JLC/NLC and CLIC under various assumptions about feedbacks and the level of ground motion. C1 SLAC, Stanford, CA USA. RP Seryi, A (reprint author), SLAC, Stanford, CA USA. NR 7 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 662 EP 664 DI 10.1109/PAC.2003.1289003 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600176 ER PT B AU Adolphsen, C AF Adolphsen, C BE Chew, J Lucas, P Webber, S TI Normal-conducting RF structure test facilities and results SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The designs for a next-generation linear collider based on normal-conducting rf structures require operation at gradients much higher than those in existing linacs. For the NLC/JLC 11.4-GHz structures, the design unloaded gradient is 65 MV/m, which is about four times that of the 2.9-GHz SLAC Linac. The CLIC proposal using 30-GHz structures requires an even higher gradient, 170 MV/m. Both the CLIC and NLC/JLC groups are aggressively pursuing programs to develop structures that operate reliably at these gradients and also have acceptable efficiencies and transverse wakefields. Much progress has been made in the past few years, and this paper reviews the programs, test facilities and results from this research. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Adolphsen, C (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. NR 10 TC 12 Z9 11 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 668 EP 672 DI 10.1109/PAC.2003.1289005 PG 5 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600178 ER PT B AU Phinney, N Adolphsen, C Ross, MC AF Phinney, N Adolphsen, C Ross, MC BE Chew, J Lucas, P Webber, S TI Reliability issues for linear colliders SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB To deliver a high integrated luminosity over several years of operation, a linear collider must not only meet its energy and luminosity performance goals, but also have a very high hardware availability and operating efficiency. The first challenge is the size and complexity of the facility. If the typical reliability of existing High Energy Physics accelerators is simply scaled to the size of a 500 GeV linear collider, the overall system availability will be too low. The final design must incorporate a more rigorous failure analysis as well as built-in overheads and redundancy. An additional challenge is the complexity of the tuning procedures required to preserve a very small beam emittance. These include beam-based alignment of magnets and rf structures, automated trajectory correction, feedback, emittance and luminosity optimization, and more. Another issue is the inherently large power densities in the beams, which can damage any beamline components they intercept. An extensive machine protection system is necessary to inhibit beam in case of a fault and automatically execute a recovery sequence. This paper will present the important issues in the context of the proposed linear collider designs. C1 SLAC, Stanford, CA 94309 USA. RP Phinney, N (reprint author), SLAC, Stanford, CA 94309 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 0-7803-7738-9 PY 2003 BP 678 EP 680 DI 10.1109/PAC.2003.1289007 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600180 ER PT B AU Tenenbaum, P AF Tenenbaum, P BE Chew, J Lucas, P Webber, S TI The JLC/NLC baseline design SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The JLC/NLC is a normal conducting linear collider based on X-band RF technology. The collider is designed to cover the center-of-mass energy range from 90 GeV to 1.3 TeV with a luminosity of 2 to 3 x 10(34) cm(-2)s(-1) between 500 GeV and 1 TeV. The X-band RF system, which is based on the operating NLC Test Accelerator X-band RF system, was recently modified in a way that will ensure a less expensive and faster demonstration of a full RF subunit. In this paper, the baseline beam parameters and RF system design for the JLC/NLC will be described, along with the demonstration schedule. C1 SLAC, Stanford, CA USA. RP Tenenbaum, P (reprint author), SLAC, Stanford, CA USA. NR 9 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 681 EP 683 DI 10.1109/PAC.2003.1289008 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600181 ER PT B AU Mottershead, T Barlow, D Blind, B Hogan, G Jason, A Merrill, F Morley, K Morris, C Saunders, A Valdiviez, R AF Mottershead, T Barlow, D Blind, B Hogan, G Jason, A Merrill, F Morley, K Morris, C Saunders, A Valdiviez, R BE Chew, J Lucas, P Webber, S TI Design and operation of a proton microscope for radiography at 800 MeV SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB A high-magnification high-resolution option is desirable for the study of small-scale dynamic experiments at the LANSCE 800-MeV Proton Radiography Facility. Magnification is achievable by either repowering the existing imaging-lens quadrupoles, using new high-gradient quadrupoles, or some hybrid combination of the two. The large and complex parameter space of magnetic optics solutions was studied extensively with the 3rd order optics code MARYLIE. Some of the hybrid solutions achieve magnifications up to 150, but at the price of high chromatic aberrations. In the end, a design using only new high-gradient permanent-magnet quadrupoles was selected and built at the design parameters that minimized chromatic aberration per unit magnification. The design has a moderate magnification of 7.1 and 15.8 at the two existing image stations. First-beam commissioning results exceeded expectations. Image contrast is produced by multiple Coulomb scattering in the thin objects. Early experimental objectives are to optimize this contrast by collimator design and by adjusting the correlation in the illuminating beam, as well as to characterize the (quite high) resolution limits of the system. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Mottershead, T (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 2 TC 8 Z9 8 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 702 EP 704 DI 10.1109/PAC.2003.1289014 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600187 ER PT B AU Bruno, D Eng, W Ganetis, G Lambiase, RF Louie, W Sandberg, J Schultheiss, C AF Bruno, D Eng, W Ganetis, G Lambiase, RF Louie, W Sandberg, J Schultheiss, C BE Chew, J Lucas, P Webber, S TI RHIC power supplies: Lessons learned from the 1999-2001 RHIC runs SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The Relativistic Heavy Ion Collider (RHIC) was commissioned in 1999 and 2000. The two RHIC rings require a total of 933 power supplies (PSs) to supply currents to highly inductive superconducting magnets. These units function as 4 main PSs, 237 insertion region (IR) PSs, 24 sextupole PSs, 24 Gamma-T PSs, 8 snake PSs, 16 spin rotator PSs, and 620 correction PSs. PS reliability in this type of machine is of utmost importance because the IR PSs are nested within other IR PSs, and these are all nested within the main PSs. This means if any main or IR PS trips off due to a PS fault or quench indication, then all the IR and main PSs in that ring must follow. When this happens, the Quench Protection Assemblies (QPA's) for each unit disconnects the PSs from the circuit and absorb the stored energy in the magnets. Commissioning these power supplies and QPA's was and still is a learning experience. A summary of the major problems encountered during these first three RHIC runs will be presented along with solutions. C1 Brookhaven Natl Lab, Brookhaven Sci Associates, Upton, NY 11973 USA. RP Bruno, D (reprint author), Brookhaven Natl Lab, Brookhaven Sci Associates, Upton, NY 11973 USA. RI Lambiase, Robert/E-1934-2013 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 0-7803-7738-9 PY 2003 BP 743 EP 745 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600199 ER PT B AU Marneris, I Brown, KA Glenn, JW Mc Nerney, A Morris, J Sandberg, J Savatteri, S AF Marneris, I Brown, KA Glenn, JW Mc Nerney, A Morris, J Sandberg, J Savatteri, S BE Chew, J Lucas, P Webber, S TI Booster main magnet power supply improvements for NASA Space Radiation Laboratory at BNL SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The NASA Space Radiation Laboratory (NSRL), constructed at Brookhaven National Laboratory, under contract from NASA, is a new experimental facility, taking advantage of heavy-ion beams from the Brookhaven Alternating Gradient Synchrotron (AGS) Booster accelerator, to study radiation effect on humans, for prolonged space missions beyond the protective terrestrial magnetosphere. This paper describes the modifications and operation of the Booster Main Magnet Power Supply (MMPS) for NSRL applications. The requirement is to run up to 1 sec flattops as high as 5000 Amps with 25 % duty cycle. The controls for the Main Magnet Power Supply were modified, including the Booster Main Magnet application program, to enable flattop operation with low ripple and spill control. An active filter (AF) consisting of a +/- 120 volts, +/-700 Amps power supply transformer coupled through a filter choke, in series with the Main Magnet voltage, was added to the system to enable further ripple reduction during the flattops. We will describe the spill servo system, designed to provide a uniform beam current, during the flattop. Results from system commissioning will be presented. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Marneris, I (reprint author), Brookhaven Natl Lab, Upton, NY 11973 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 BN 0-7803-7738-9 PY 2003 BP 746 EP 748 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600200 ER PT B AU Medvedko, E Olsen, J Leyh, G Smith, S Hettel, R Wermelskirchen, C Straumann, T AF Medvedko, E Olsen, J Leyh, G Smith, S Hettel, R Wermelskirchen, C Straumann, T BE Chew, J Lucas, P Webber, S TI High resolution analog/digital power supply controller SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Corrector magnets for the SPEAR-3 synchrotron radiation source require precision, high-speed control for use with beam-based orbit feedback. A new Controller Analog/Digital Interface card (CANDI) has been developed for these purposes. The CANDI has a 24-bit DAC for current control and three 24-bit Delta-Sigma ADCs to monitor current and voltages. The ADCs can be read and the DAC updated at the 4 kHz rate needed for feedback control. A precision 16-bit DAC provides on-board calibration. Programmable multiplexers control internal signal routing for calibration, testing, and measurement. Feedback can be closed internally on current setpoint, externally on supply current, or beam position. Prototype and production tests are reported in this paper. Noise is better than 17 effective bits in a 10 mHz to 2 kHz bandwidth. Linearity and temperature stability are excellent. C1 Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Medvedko, E (reprint author), Stanford Linear Accelerator Ctr, Stanford, CA 94309 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 BN 0-7803-7738-9 PY 2003 BP 761 EP 763 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600205 ER PT B AU Spencer, J Mao, S Spencer, C Park, M AF Spencer, J Mao, S Spencer, C Park, M BE Chew, J Lucas, P Webber, S TI Further experience with SLC permanent magnetic (PM) multipoles SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB PM multipoles have been used in the SLAC damping rings (DR) and their injection and extraction lines since 1985. Due to upgrades of the DR vacuum chambers for higher currents in 1993, there was an opportunity to check some of these magnets[1]. Nothing more was done until a program of real-time radiation measurements was begun in the electron ring to determine causes, levels and effects of integrated gamma and neutron doses on the strengths and harmonic contents for NLC purposes. We discuss results of the latest magnetic measurements, radiation measurement program, semiconductor dosimeters and a few unexpected but interesting conclusions. C1 SLAC, Menlo Pk, CA 94025 USA. RP Spencer, J (reprint author), SLAC, Menlo Pk, CA 94025 USA. 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 0-7803-7738-9 PY 2003 BP 779 EP 781 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600211 ER PT B AU He, P Hseuh, HC Lee, RC Mapes, M Smart, LA Weiss, D Zhang, SY AF He, P Hseuh, HC Lee, RC Mapes, M Smart, LA Weiss, D Zhang, SY BE Chew, J Lucas, P Webber, S TI Improvement of RHIC warm beam vacuum for high intensity operation SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB With increasing ion beam intensity during recent RHIC operations, pressure rises of several decades were observed at a few warm vacuum sections. Improvement of the warm sections has been carried out in last year's shutdown. Extensive in-situ bakes, additional UHV pumping, electron detectors and beam tube solenoids have been implemented. Vacuum monitoring and interlock were enhanced to reduce premature beam aborts. The effectiveness of these measures in reducing the beam induced pressure bumps and in increasing the vacuum system reliability are discussed and summarized. C1 BNL, Collider Accelerator Dept, Upton, NY 11973 USA. RP He, P (reprint author), BNL, Collider Accelerator Dept, Upton, NY 11973 USA. NR 8 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 785 EP 787 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600213 ER PT B AU He, P Hseuh, HC Mapes, M Todd, R Hilleret, N AF He, P Hseuh, HC Mapes, M Todd, R Hilleret, N BE Chew, J Lucas, P Webber, S TI Outgassing and surface properties of tin coated SNS ring vacuum chambers SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID STAINLESS-STEEL; DESORPTION AB The stainless steel vacuum chambers of the 248m Spallation Neutron Source (SNS) accumulator ring are being coated with similar to 100 nm of titanium nitride (TiN) to reduce the secondary electron yield (SEY). The coating is produced by DC magnetron sputtering using a long cathode imbedded with permanent magnets. The outgassing rates of several SNS half-cell chambers, with and without TiN coating, and before and after in-situ bake, were measured. The SEY of the coated chamber coupons were also measured with primary electron energy of 50-3000 eV. By varying the coating parameters, films of different surface roughness were produced and analyzed by scanning electron microscopy. It was found that the outgassing rate varies as a function of surface roughness of the TiN layer, and chambers with a rougher surface have a lower SEY. C1 BNL, Collider Accelerator Dept, Upton, NY 11973 USA. RP He, P (reprint author), BNL, Collider Accelerator Dept, Upton, NY 11973 USA. NR 13 TC 2 Z9 5 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 788 EP 790 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600214 ER PT B AU He, P Hseuh, HC Todd, R AF He, P Hseuh, HC Todd, R BE Chew, J Lucas, P Webber, S TI Pressure distribution simulation for SNS ring vacuum systems SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Brookhaven is responsible for the design and construction of the US Spallation Neutron Source (SNS) accumulator ring and beam transport lines. Ultrahigh vacuum of a few nano-Torr is required for the accumulator ring to minimize the residual gas ionization. To size the pumps and to optimize the pump locations, the pressure distribution in the vacuum systems has to be calculated based on chamber conductance, the static and dynamic outgassing; of the chamber walls and the beam components. A computer program, based on finite differential approximation, was used to model the pressure in the accumulator ring, using the measured outgassing rates of chambers with and without TiN coating. The simulation results indicate that the designed vacuum will be achieved after prolonged pumping due to the high outgassing associated with the low secondary electron yield coatings. C1 Collider Accelerator Dept, BNL, Upton, NY 11973 USA. RP He, P (reprint author), Collider Accelerator Dept, BNL, Upton, NY 11973 USA. 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 0-7803-7738-9 PY 2003 BP 791 EP 793 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600215 ER PT B AU Iriso-Ariz, U Drees, A Fischer, W Gassner, D Gould, O Gullotta, J Lee, R Ponnaiyan, V Trbojevic, D Zeno, K Zhang, SY AF Iriso-Ariz, U Drees, A Fischer, W Gassner, D Gould, O Gullotta, J Lee, R Ponnaiyan, V Trbojevic, D Zeno, K Zhang, SY BE Chew, J Lucas, P Webber, S TI Electron detectors for vacuum pressure rise diagnostics at RHIC SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB In the RHIC 2001 run, an unexpected vacuum pressure rise versus bunch increasing currents was observed in both gold and proton operations. This pressure increase due to molecular desorption is suspected to be induced mainly by electron multipacting, but other causes may coexist, such as ion desorption due to halo scraping. In order to get a reliable diagnostic of the phenomenon electron detectors have been installed along the RHIC ring. In this report we describe results measured by the electron detectors with energy filters during the RHIC 2002/2003 run. C1 BNL, Upton, NY 11973 USA. RP Iriso-Ariz, U (reprint author), BNL, Upton, NY 11973 USA. NR 5 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 794 EP 796 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600216 ER PT B AU Iriso-Ariz, U Blaskiewicz, M Drees, A Fischer, W Peggs, S Trbojevic, D AF Iriso-Ariz, U Blaskiewicz, M Drees, A Fischer, W Peggs, S Trbojevic, D BE Chew, J Lucas, P Webber, S TI Electron cloud and pressure rise simulations for RHIC SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Beam induced electron multipacting may be among the main reasons for the vacuum pressure rise when circulating high intensity ion and proton beams in RHIC. Latest simulation results are benchmarked with recent experimental observations for RHIC, and compared to other general computer codes. The influence of the electron multipacting to the vacuum properties is also discussed. C1 BNL, Upton, NY 11973 USA. RP Iriso-Ariz, U (reprint author), BNL, Upton, NY 11973 USA. NR 9 TC 4 Z9 4 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 797 EP 799 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600217 ER PT B AU Wells, RP Corlett, JN Zholents, AA AF Wells, RP Corlett, JN Zholents, AA BE Chew, J Lucas, P Webber, S TI Re-circulating linac vacuum system SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The vacuum system for a proposed 2.5 GeV, 10muA recirculating linac synchrotron light source [1] is readily achievable with conventional vacuum hardware and established fabrication processes. Some of the difficult technical challenges associated with synchrotron light source storage rings are sidestepped by the relatively low beam current and short beam lifetime requirements of a re-circulating linac. This minimal lifetime requirement leads directly to relatively high limits on the background gas pressure through much of the facility. The 10muA average beam current produces very little synchrotron radiation induced gas desorption and thus the need for an "ante-chamber" in the vacuum chamber is eliminated. In the arc bend magnets, and the insertion devices, the vacuum chamber dimensions can be selected to balance the coherent synchrotron radiation and resistive wall wakefield effects, while maintaining the modest limits on the gas pressure and minimal outgassing. C1 LBNL, Berkeley, CA 94720 USA. RP Wells, RP (reprint author), LBNL, Berkeley, CA 94720 USA. NR 10 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 812 EP 814 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600222 ER PT B AU Lee, SH Trakhtenberg, E Den Hartog, P AF Lee, SH Trakhtenberg, E Den Hartog, P BE Chew, J Lucas, P Webber, S TI Insertion device vacuum chamber for the linac coherent light source SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The vacuum requirement for the undulator line of the Linac Coherent Light Source is extremely challenging: a low resistive wall impedance 3.42-m-long chamber that fits within a 6.3 mm undulator gap that has ultralow outgassing and a surface finish, less than 100 nm Ra. A prototype chamber will be fabricated from electropolished semiconductor-processing-grade stainless-steel seamless tubing. Since stainless-steel tubing has a high electric resistivity, which can increase the resistive wall wake, a thin layer of copper will be deposited to minimize this effect. A thin nickel plating will be deposited in advance for better adhesion. This process will be followed by electropolishing of the copper surface. The first approach for Cu coating of the vacuum chamber has been investigated. Roughness measurements and preliminary coating results with a one-meter-long tube will be presented. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Lee, SH (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. 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 0-7803-7738-9 PY 2003 BP 824 EP 826 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600226 ER PT B AU Sereno, NS AF Sereno, NS BE Chew, J Lucas, P Webber, S TI Advanced photon source booster synchrotron subharmonic RF capture design SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Recent efforts at the APS have focused on improving overall injector system reliability and availability for top-up mode storage ring operation. One proposal being considered is to implement direct injection of the beam from the linac into the booster synchrotron, thereby bypassing the particle accumulator ring (PAR). Efficient capture of the long linac macropulse (>similar to 10 ns) can be accomplished by adding an additional rf system in the booster at an appropriate subharmonic of the 352-MHz rf system. The subharmonic system is used during injection up to approximately 3 GeV, then the 352-MHz system is turned on to accelerate the beam to 7 GeV. The particle tracking program elegant is used to simulate rf and magnet ramping, beam loading, and HOM effects at up to 10-nC beam charge. Issues addressed in this design are efficient beam capture and acceleration to 7 GeV while maintaining adjacent bunch purity. Tolerances on various rf system parameters are presented in order to maintain bunch purity to better than 1 part in 100,000. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Sereno, NS (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. 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 0-7803-7738-9 PY 2003 BP 827 EP 829 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600227 ER PT B AU Trakhtenberg, E Wiemerslage, G DenHartog, P Brajuskovic, B AF Trakhtenberg, E Wiemerslage, G DenHartog, P Brajuskovic, B BE Chew, J Lucas, P Webber, S TI New insertion device vacuum chambers at the advanced photon source SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Six new types of insertion device vacuum chambers have been designed at the Advanced Photon Source (APS). One chamber has been designed for the APS canted undulator beamlines, two for the Canadian Light Source (CLS), and three for BESSY II. For the double canted undulators and CLS, a new extrusion shape with an oval aperture (not elliptical as usual) was developed and extruded. That required a thorough stress analysis and some compromise, which included a small increase of the vacuum chamber wall thickness. The details of the stress analyses and design of the chambers, along with lessons learned, are presented. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Trakhtenberg, E (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. 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 0-7803-7738-9 PY 2003 BP 830 EP 832 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600228 ER PT B AU Den Hartog, PK Decker, GA Emery, LJ AF Den Hartog, PK Decker, GA Emery, LJ BE Chew, J Lucas, P Webber, S TI Dual canted undulators at the advanced photon source SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB At the Advanced Photon Source (APS), 34 straight sections are reserved for the installation of insertion devices for users. Each straight section allows space for up to two 2.4-meter-long devices. By sacrificing 0.4 in of undulator from each device and introducing a one milliradian chicane with three small electromagnets, two separate experimental programs can be conducted using the same straight section, thereby potentially doubling the scientific output with the same real estate. The design of the straight section and front end and plans for implementation and commissioning of this scheme at the APS during May 2003 are presented. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Den Hartog, PK (reprint author), Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. NR 8 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 833 EP 835 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600229 ER PT B AU Sannibale, F Byrd, JM Loftsdottir, A Martin, MC Venturini, M AF Sannibale, F Byrd, JM Loftsdottir, A Martin, MC Venturini, M BE Chew, J Lucas, P Webber, S TI A model for producing stable, broadband terahertz coherent synchrotron radiation in storage rings SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB We present a model for producing stable broadband coherent synchrotron radiation (CSR) in the terahertz frequency region in an electron storage ring. The model includes distortion of bunch shape from the synchrotron radiation (SR), enhancing higher frequency coherent emission and limits to stable emission due to a microbunching instability excited by the SR. We use this model to optimize the performance of a source for CSR emission. C1 Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Sannibale, F (reprint author), Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 12 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 863 EP 865 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600239 ER PT B AU Corlett, J De Santis, S Wolski, A Zholents, A AF Corlett, J De Santis, S Wolski, A Zholents, A BE Chew, J Lucas, P Webber, S TI Collective effects analysis for the Berkeley femtosource SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB We present an overview of collective effects in a proposed ultrafast x-ray facility, based on a recirculating linac. The facility requires a small vertical emittance of 0.4 mm-mrad and is designed to operate with a "flat bunch" with a large emittance ratio. Emittance control from the electron source at the RF photocatode to the photon production chain of undulators, including understanding and mitigation of collective effects, is critical to successful machine operation. Key aspects of accelerator physics involved in beam break-up, coherent synchrotron radiation, resistive wall impedance and other effects have been addressed and reported here. C1 LBNL, Berkeley, CA 94720 USA. RP Corlett, J (reprint author), LBNL, Berkeley, CA 94720 USA. OI Wolski, Andrzej/0000-0002-5057-5588 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 0-7803-7738-9 PY 2003 BP 866 EP 868 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600240 ER PT B AU Scarvie, T Andresen, N Baptiste, K Byrd, J Chin, M Martin, M McKinney, W Steier, C AF Scarvie, T Andresen, N Baptiste, K Byrd, J Chin, M Martin, M McKinney, W Steier, C BE Chew, J Lucas, P Webber, S TI Noise reduction efforts for the infrared beamline at the advanced light source SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The quality of infrared microscopy and spectroscopy data collected at synchrotron based sources is strongly dependent on noise. We have successfully identified and suppressed several noise sources affecting Beamline 1.4.3 at the Advanced Light Source (ALS), resulting in significant reductions to the noise in the users' FTIR spectra. In this paper, we present our methods of noise source analysis and the techniques used to reduce the noise and its negative effect on the infrared beam quality. These include analyzing and changing physical mounts to better isolate portions of the beamline optics from low-frequency environmental noise, and modifying the input signals to the main ALS RF system. We also discuss the relationship between electron beam energy oscillations at a point of dispersion and infrared beamline noise. C1 LBNL, Berkeley, CA 94720 USA. RP Scarvie, T (reprint author), LBNL, Berkeley, CA 94720 USA. OI McKinney, Wayne/0000-0003-2586-3139 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 0-7803-7738-9 PY 2003 BP 869 EP 871 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600241 ER PT B AU Zholents, A AF Zholents, A BE Chew, J Lucas, P Webber, S TI Longitudinal phase space control in the berkeley femtosecond x-ray light source LUX SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB LUX, the proposed Berkeley femtosecond x-ray light source, is a similar to2.5 GeV recirculating linear accelerator, where electrons reach their final energy in four passes through a 600 MeV superconducting linac after injection at similar to 120 MeV. An important consideration for this machine is the preservation of the electron beam longitudinal emittance through the various stages of acceleration including injection linac, bunch compression, and various passages through the linac and magnetic arcs. In this paper we analyze the longitudinal dynamics of electrons and define a strategy for the electron beam manipulation leading to a successful conservation of the longitudinal emittance. Particular attention is given to the management of the correlated energy spread induced by collective effects such as longitudinal wake fields and coherent synchrotron radiation (CSR). C1 LBNL, Berkeley, CA 94720 USA. RP Zholents, A (reprint author), LBNL, Berkeley, CA 94720 USA. 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 0-7803-7738-9 PY 2003 BP 872 EP 874 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600242 ER PT B AU Li, Y Huang, Z Lewellen, J Milton, SV Sajaev, V Kim, KJ AF Li, Y Huang, Z Lewellen, J Milton, SV Sajaev, V Kim, KJ BE Chew, J Lucas, P Webber, S TI Temporal characteristics of a SASE FEL SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID FREE-ELECTRON LASER; GENERATION AB We have performed a single-shot, time-resolved measurement of the output field of a SASE FEL using the frequency-resolved optical gating (FROG) technique. The measurement reveals the phase and the amplitude of the SASE output as functions of time and frequency, hence enables us to perform a full characterization of the SASE FEL output. We examined both the single-shot field evolution as well as the statistics over multiple shots on the phase and intensity evolution. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Li, Y (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 15 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 905 EP 907 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600253 ER PT B AU Loos, H Shaftan, T AF Loos, H Shaftan, T BE Chew, J Lucas, P Webber, S TI Beam-based undulator field characterization and correction at DUV-FEL SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID FREE-ELECTRON-LASER; GAIN AB We present the results of the commissioning of the 10 m long NISUS undulator of the Deep Ultra Violet Free Electron Laser (DUV-FEL) project. The magnet and diagnostics geometry is discussed and tolerances on the beam trajectory straightness are shown. The beam-based alignment algorithm and its application to correct the NISUS field errors are described. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Loos, H (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. RI Shaftan, Timur/A-8443-2009; OI Loos, Henrik/0000-0001-5085-0562 NR 10 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 908 EP 910 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600254 ER PT B AU Kurennoy, SS Schrage, DL Wood, RL Young, LM Schultheiss, T Christina, V Rathke, J AF Kurennoy, SS Schrage, DL Wood, RL Young, LM Schultheiss, T Christina, V Rathke, J BE Chew, J Lucas, P Webber, S TI Photoinjector RF cavity design for high power CWFEL SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The project is under way to develop a key enabling technology for high-power CW FEL: an RF photoinjector capable of producing continuous average current greater than 100 mA. The specific aim is a pi-mode, normal-conducting RF photoinjector, 3 nC of bunch charge, 100 mA of current (at 33.3-MHz bunch repetition rate) and emittance less than 10 mm-mrad. This level of performance will enable robust 100-kW-class FEL operation with electron beam energy <100 MeV, thereby reducing the size and cost of the FEL. This design is scalable to the MW power level by increasing the electron bunch repetition rate to a higher value. The major challenges are emittance control and high heat flux within the CW 700-MHz RF cavities. Results of RF cavity design and cooling schemes are presented, including both high-velocity water and liquid-nitrogen cooling options. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Kurennoy, SS (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 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 0-7803-7738-9 PY 2003 BP 920 EP 922 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600258 ER PT B AU Fawley, WM Barletta, WA Corlett, JN Zholents, A AF Fawley, WM Barletta, WA Corlett, JN Zholents, A BE Chew, J Lucas, P Webber, S TI Simulation studies of a XUV/soft X-ray harmonic-cascade FEL for the proposed LBNL recirculating LINCAC SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID GENERATION AB Presently there is significant interest at LBNL in designing and building a facility for ultrafast (i.e. femtosecond time scale) x-ray science based upon a superconducting, recirculating RF linac (see [1] for more details). In addition to producing synchrotron radiation pulses in the 1-15 keV energy range, we are also considering adding one or more free-electron laser (FEL) bean-dines using a harmonic cascade approach to produce coherent XUV & soft X-ray emission beginning with a strong input seed at similar to 200 nm wavelength obtained from a "conventional" laser. Each cascade is composed of a radiator together with a modulator section, separated by a magnetic chicane. The chicane temporally delays the electron beam pulse in order that a "virgin" pulse region (with undegraded energy spread) be brought into synchronism with the radiation pulse, which together then undergo FEL action in the modulator. We present various results obtained with the GINGER simulation code examining final output sensitivity to initial electron beam parameters. We also discuss the effects of external laser noise and shot noise upon this particular cascade approach which can limit the final output coherence. C1 LBNL, Berkeley, CA 94720 USA. RP Fawley, WM (reprint author), LBNL, Berkeley, CA 94720 USA. NR 7 TC 7 Z9 7 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 923 EP 925 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600259 ER PT B AU Emma, P Stupakov, G AF Emma, P Stupakov, G BE Chew, J Lucas, P Webber, S TI Limitations of electron beam conditioning for free-electron lasers SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID FEL C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Emma, P (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. 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 0-7803-7738-9 PY 2003 BP 926 EP 928 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600260 ER PT B AU Boyce, JR Douglas, DR Toyokawa, H AF Boyce, JR Douglas, DR Toyokawa, H BE Chew, J Lucas, P Webber, S TI Sub-picosecond, high flux, Thomson X-ray sources at Jefferson Lab's high power FEL SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID GENERATION AB With the advent of high average power FELs, the idea of using such a device to produce x-rays via the Thomson scattering process is appealing, if sufficient flux and/or brightness can be generated. Such x-rays are produced simultaneously with FEL light, offering unprecedented opportunities for pump-probe studies. We discuss non-invasive modifications to the Jefferson Lab's FEL that would meet the criteria of high flux, sub-picosecond, x-ray source. One allows proof-of-principle experiments, is relatively inexpensive, but is not conducive as a "User-facility." Another is a User facility configuration but requires FEL facility modifications. For all sources, we present Thomson scattering flux calculations and potential applications. C1 Thomas Jefferso Natl Accelerator Facil, Newport News, VA 23606 USA. RP Boyce, JR (reprint author), Thomas Jefferso Natl Accelerator Facil, Newport News, VA 23606 USA. NR 10 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 938 EP 940 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600264 ER PT B AU Zhang, YH Derbenev, Y Boyce, JR Li, R AF Zhang, YH Derbenev, Y Boyce, JR Li, R BE Chew, J Lucas, P Webber, S TI Image charge undulator: Theoretical model and technical issues SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB A relativistic electron beam undergoes undulating motion due to its image charge wakefields while passing close to a conducting grating surface. A new device, an image charge undulator, has been proposed recently [1] to utilize this mechanism for generating coherent hard radiation. We demonstrate the physics principle of this device by a 2D model of a uniform sheet beam. The transverse image charge wakefields, synchrotron radiation frequency and coherent radiation gain length are presented. We discuss a proof-of-principle experiment that takes into consideration such technical issues as grating fabrication, flat beams and beam alignment. C1 Jefferson Lab, Newport News, VA 23606 USA. RP Zhang, YH (reprint author), Jefferson Lab, Newport News, VA 23606 USA. 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 0-7803-7738-9 PY 2003 BP 941 EP 943 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600265 ER PT B AU Ahle, L Bernstein, L Rusnak, B Berio, R AF Ahle, L Bernstein, L Rusnak, B Berio, R BE Chew, J Lucas, P Webber, S TI A neutron source facility for neutron cross-section measurements on radioactive targets at RIA SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The stockpile stewardship program is interested in neutron cross-section measurements on nuclei that are a few nucleons away from stability. Since neutron targets do not exist, radioactive targets are the only way to directly perform these measurements. This requires a facility that can provide high production rates for these short-lived nuclei as well as a source of neutrons. The Rare Isotope Accelerator (RIA) promises theses high production rates. Thus, adding a co-located neutron source facility to the RIA project baseline would allow these neutron cross-section measurements to be made. A conceptual design for such a neutron source has been developed, which would use two accelerators, a Dynamitron and a linac, to create the neutrons through a variety of reactions (d-d, d-t, deuteron break-up, p-Li). This range of reactions is needed in order to provide the desired energy range from 10's of keV to 20 MeV. The facility would also have hot cells to perform chemistry on the radioactive material both before and after neutron irradiation. The present status of this design and direction of future work will be discussed. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Ahle, L (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. 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 0-7803-7738-9 PY 2003 BP 989 EP 991 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600281 ER PT B AU Alton, GD Zhang, Y Tatum, BA AF Alton, GD Zhang, Y Tatum, BA BE Chew, J Lucas, P Webber, S TI An axial injection system for the ORIC SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID CYCLOTRON AB An axial injection system has been designed for injection of high intensity beams of H-, D-, and He++ into the Oak Ridge Isochronous Cyclotron (ORIC). The device consists of two high-voltage platforms, two external ion sources, a double-drift-tube beam bunching system, a spiral inflector and integrated beam analysis diagnostics and focusing elements. With the axial injection system, it is expected that more than 100 muA of high quality, primary light ion beams will be extracted from the ORIC using either the existing septum extraction system for He++ beams or a foil stripping extraction system for extracting either H+ or D+ beams. In addition, beam scattering and the consequent internal activation problems, endemic with the present short lifetime internal Penning discharge source along with the down times attributable to its maintenance will be dramatically reduced. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Alton, GD (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. NR 6 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 995 EP 997 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600283 ER PT B AU Liu, Y Alton, GD Bilheux, H Cole, JM Meyer, FW Mills, GD Reed, CA Williams, CL AF Liu, Y Alton, GD Bilheux, H Cole, JM Meyer, FW Mills, GD Reed, CA Williams, CL BE Chew, J Lucas, P Webber, S TI Initial performance of a 6 GHZ "volume" ECR ion source SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID FREQUENCY; DESIGN AB An all-permanent-magnet, 6-GHz "volume-type" ECR ion source has been constructed and evaluated. This source employs a novel magnetic field configuration with an extended central flat region to form a large, on-axis, ECR volume. It can also be converted to a traditional minimum-B source where the ECR zones are surfaces. Comparisons are made of the performance of the source when operated in both "volume" and "surface" modes. According to the preliminary results, the "volume" mode is superior in terms of ion beam intensities and charge-state distributions. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Liu, Y (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. RI Bilheux, Hassina/H-4289-2012 OI Bilheux, Hassina/0000-0001-8574-2449 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 0-7803-7738-9 PY 2003 BP 998 EP 1000 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600284 ER PT B AU Zhang, Y Alton, GD AF Zhang, Y Alton, GD BE Chew, J Lucas, P Webber, S TI Electric field distribution in a spiral inflector for cyclotron injection applications SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The results of numerical studies of the electric field distributions in a spiral inflector, designed for axial injection system of H-, D- and He++ beams into the Oak Ridge Isochronous Cyclotron (ORIC), are presented in this report. Discrepancies are found between the electric fields obtained from numerical computations and those derived from theoretical field distributions within the inflector. Fringe fields at the entrance to the inflector, in combination with the field discrepancies, lead to significant deviations in particle trajectories from those derived from analytical expressions for fields within such devices. A method is described for shaping the electrode surfaces of the spiral inflector that is effective in compensating for fringe fields at the entrance to the inflector and a simple solution is introduced that eliminates the seemingly unavoidable shift in the central beam path. As a consequence of these studies, we arrive at a design for a spiral inflector that operates at a low voltage with greatly improved optical properties in which the paths of injected particles are precisely known. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Zhang, Y (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. 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 0-7803-7738-9 PY 2003 BP 1001 EP 1003 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600285 ER PT B AU Zhang, Y Mueller, PE AF Zhang, Y Mueller, PE BE Chew, J Lucas, P Webber, S TI An RFQ injection system for the HRIBF SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID NE-18; BEAM AB At the Holifield Radioactive Ion Beam Facility (HRIBF) at Oak Ridge National Laboratory (ORNL), molecular ions extracted from a positive ion source and subsequently broken up in a charge-exchange cell produce Radioactive Ion Beams (RIBs) with several hundred eV energy spread, preventing effective magnetic isobar separation. In order to perform magnetic isobar separation prior to charge exchange, a multi-harmonic buncher and a 12-MHz RFQ (Radio-Frequency Quadrupole) is proposed to supplement the present 300-kV injection system for the 25-MV tandem electrostatic accelerator. The RFQ will be mounted on a variable high voltage platform to accelerate ions with masses from 10 to 150 amu. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Zhang, Y (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 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 0-7803-7738-9 PY 2003 BP 1004 EP 1006 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600286 ER PT B AU Brajuskovic, B Den Hartog, P Trakhtenberg, E AF Brajuskovic, B Den Hartog, P Trakhtenberg, E BE Chew, J Lucas, P Webber, S TI Mechanical analysis of the prototype undulator for the linac coherent light source SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The Linac Coherent Light Source (LCLS) will require undulators with unprecedented mechanical precision in order to achieve the magnetic field requirements. Distortion of the undulator strongback due to the thermal effects and magnetic and gravitational forces could seriously degrade the performance. To minimize the distortion, a C-type, fixed-gap undulator with titanium strongback will be used. An analysis of the design of the structure and a comparison of the predicted results with the mechanical requirements and with magnetic measurements is presented. C1 ANL APS, Argonne, IL USA. RP Brajuskovic, B (reprint author), ANL APS, Argonne, IL USA. NR 5 TC 1 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 1017 EP 1019 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600291 ER PT B AU Kim, SH Dejus, RJ Doose, C Kustom, RL Moog, ER Petra, M Thompson, KM AF Kim, SH Dejus, RJ Doose, C Kustom, RL Moog, ER Petra, M Thompson, KM BE Chew, J Lucas, P Webber, S TI Development of a short-period superconducting undulator at APS SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB A planar superconducting undulator (SCU) with a period of 15 mm is under development at the Advanced Photon Source (APS). The intended users require a photon energy that can be tuned from 19 to 28 keV for inelastic x-ray scattering studies. The SCU design consists of two low-carbon-steel cores that are positioned above and below the beam chamber. There are 20 turns of NbTi/Cu superconducting (SC) wire within a coil cross section of 4.3 x 4.0 (w x h) mm. At a pole gap of 8 mm, the necessary average current density in the coil will be about 2 1 kA/mm(2) to achieve a peak field of 0.8 T on the beam axis. The design and fabrication progress of a 12-period prototype SCU are presented, and some challenging requirements are discussed. C1 Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA. RP Kim, SH (reprint author), Argonne Natl Lab, Adv Photon Source, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 2 TC 7 Z9 7 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 1020 EP 1022 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600292 ER PT B AU Prestemon, S Dietderich, DR Gourlay, SA Heimann, P Marks, S Sabbi, GL Scanlan, RM Schlueter, R Wang, B Wahrer, B AF Prestemon, S Dietderich, DR Gourlay, SA Heimann, P Marks, S Sabbi, GL Scanlan, RM Schlueter, R Wang, B Wahrer, B BE Chew, J Lucas, P Webber, S TI Design and evaluation of a short period Nb3Sn superconducting undulator prototype SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The design of a class of short period superconducting undulators is presented. We begin with a parameter-based analysis that provides insight into potential device performance as a function of the properties of superconducting materials. We present data on candidate low-temperature superconducting materials and the motivation to consider low-copper fraction, high Jc materials. Measured data on recent Nb3Sn conductors is provided, together with wire and cable design issues that are tailored for undulator applications. Key design concerns are then addressed, in particular the quench protection system limitations and the system performance. Progress on the construction and testing of a prototype 30mm period device is described. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Prestemon, S (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 4 TC 7 Z9 7 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 1032 EP 1034 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600296 ER PT B AU Wu, JH AF Wu, JH BE Chew, J Lucas, P Webber, S TI Harmonic contents of and detailed study on a high-gain harmonic generation free electron laser SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID FEL SIMULATION; RADIATION; CODE AB In this paper, we calculate the third harmonic of a High Gain Harmonic Generation (HGHG) Free Electron Laser (FEL) at saturation. In the HGHG FEL scheme, there is an external dispersion section, which provides an efficient microbunching. Study on the emittance effect in such an external dispersion section suggests a new optimization for the HGHG FEL. We finally discuss how to reduce the incoherent undulator radiation which is a noise with respect to the seed laser. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Wu, JH (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM jhwu@SIAC.Stanford.EDU NR 23 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 1035 EP 1037 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600297 ER PT B AU Wu, JH Raubenheimer, TO Stupakov, G AF Wu, JH Raubenheimer, TO Stupakov, G BE Chew, J Lucas, P Webber, S TI Calculation of the coherent synchrotron radiation impedance from a wiggler SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn ID EMITTANCE GROWTH AB Most studies of coherent synchrotron radiation (CSR) have considered only the radiation from independent dipole magnets. However, in the damping rings of future linear colliders and many high luminosity factories, a large fraction of the radiation power will be emitted in damping wigglers. In this paper, the longitudinal wakefield and impedance due to CSR in a wiggler are derived in the limit of a large wiggler parameter K. After an appropriate scaling, the results can be expressed in terms of universal functions, which are independent of K. Analytical asymptotic results are obtained for the wakefield in the limit of large and small distances, and for the impedance in the limit of small and high frequencies. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Wu, JH (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 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 0-7803-7738-9 PY 2003 BP 1038 EP 1040 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600298 ER PT B AU Cardona, J Abell, DT Peggs, S AF Cardona, J Abell, DT Peggs, S BE Chew, J Lucas, P Webber, S TI Studies on sextupole components generated by eddy currents in the rapid cycling medical synchrotron SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The Rapid Cycling Medical Synchrotron is a second generation medical accelerator that it has been designed with a repetition frequency of 30 Hz. This repetition frequency is far above the typical repetition frequency used in medical accelerators. An elliptical beam pipe has been chosen for the RCMS design in order to win as much physical aperture as possible while keeping the magnet dimensions as small as possible. Rapid Cycling induces Eddy current in the magnets. Eddy currents and elliptical beam pipes generate sextupole components that might be neccesary to consider. In this paper, the effects of these sextupoles components are evaluated, first by looking at the phase space of a bunch of particles that has been tracked for 62530 turns, and also by evaluating the dynamical aperture of the accelerator. The effect of the sextupoles component in the tuneshift is also evaluated. First results obtained with Marylie show that the width of a phase space ellipse of a bunch of particles is slightly affected by the sextupoles due to the Eddy currents. C1 BNL, Upton, NY USA. RP Cardona, J (reprint author), BNL, Upton, NY USA. 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 0-7803-7738-9 PY 2003 BP 1059 EP 1061 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600305 ER PT B AU Lyles, JTM Rybarcyk, LJ Bridges, JF AF Lyles, JTM Rybarcyk, LJ Bridges, JF BE Chew, J Lucas, P Webber, S TI Ferrite evaluation for AHF proton synchrotrons SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The Advanced Hydrotest Facility (AHF) proton synchrotrons are likely to use parallel-biased, Nickel-Zinc ferrite cores in accelerating cavities. The Booster frequency is anticipated to be in the range of 0.32 - 1.25 MHz, depending on the choice of final energy and design, while the 50 GeV Main Ring (MR) frequency range is 4 - 5.03 MHz. Experiments were conducted to characterize the response of large rings of Ferroxcube 4M2, 4B3 and 8C12 ferrites over these frequency ranges. Testing of 4M2 for the Booster revealed degraded performance due to the nonlinear response of incremental permeability at elevated flux densities [1]. This constrains the operating voltage to a range well below the thermal power limits of the material. The 4M2 and 4133 material appears to be satisfactory for the MR. The 8C12 material is satisfactory for the Booster if it is operated below the threshold of a high loss effect. The final cavity designs will be based upon the results of ferrite measurements from the test cavity, for the requirements of the AHF accelerators. Testing methods, analysis and results will be presented. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Lyles, JTM (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. 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 0-7803-7738-9 PY 2003 BP 1092 EP 1094 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600316 ER PT B AU Rees, D Bradley, J Cummings, K Hardek, T Lynch, M Roybal, W AF Rees, D Bradley, J Cummings, K Hardek, T Lynch, M Roybal, W BE Chew, J Lucas, P Webber, S TI The SNS linac high power RF system design, status, and results SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The Spallation Neutron Source being built at the Oak Ridge National Lab in Tennessee requires a 1 GeV proton linac. Los Alamos has responsibility for the RF systems for the entire linac. The linac requires 3 distinct types of RF systems: 2.5-MW peak, 402.5 MHz, RF systems for the RFQ and DTL (7 systems total); 5-MW peak, 805 MHz systems for the CCL and the two energy corrector cavities (6 systems total); and 550-kW peak, 805 MHz systems for the superconducting sections (81 systems total). The design of the SNS Linac RF system was presented at the 2001 Particle Accelerator Conference in Chicago. Vendors have been selected for the klystrons (3 different vendors), circulators (1 vendor), transmitter (1 vendor), and high power RF loads (3 different vendors). This paper presents the results and status of vendor procurements, test results of the major components of the Linac RF system and our installation progress. C1 Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Rees, D (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87544 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 BN 0-7803-7738-9 PY 2003 BP 1095 EP 1097 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600317 ER PT B AU Wang, H Harwood, L Nelson, R Hovater, C Delayen, J AF Wang, H Harwood, L Nelson, R Hovater, C Delayen, J BE Chew, J Lucas, P Webber, S TI JLAB high efficiency klystron baseline design for 12 GEV upgrade SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB A computer design of a 13.5 kW, 1497 MHz, CW type, 55% efficiency, 0.8 muP beam perveance, similar to40 dB gain, 5-cavity klystron has been developed for the JLAB 12GeV Upgrade project. The design uses TRICOMP codes to simulate the gun, modulating anode section, solenoid focus channel and beam dump. The klystron tube was designed by JPNDISK (1D) code initially and then optimized by MASK (2D) code for the baseline parameters. All of these codes have been bench marked by JLAB 5 kW operational klystrons. The details of scaling laws, design parameters and the simulation results are presented. C1 TJNAF, Newport News, VA 23606 USA. RP Wang, H (reprint author), TJNAF, Newport News, VA 23606 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 BN 0-7803-7738-9 PY 2003 BP 1098 EP 1100 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600318 ER PT B AU Wang, HP AF Wang, HP BE Chew, J Lucas, P Webber, S TI Analytical design of a waveguide iris/stub tuning coupler to an overcoupled superconducting cavity SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The high RF power test of a superconducting cavity without beam loading requires a variable coupling scheme. For a fixed power coupler and a finite source power, one needs to increase the external Q. A 3-stub tuner placed between the doorknob transition and an iris plate inside of WR975 waveguide has been developed for the SNS cryomodule test facility (CMTF). This paper describes the theoretical analysis, calculation by equivalent circuits and the coupling scale related to the stub tuning and the iris size. A copper model bench measurement and a 3D computer simulation proved the principle and some of the parameters. A factor of 100 over Q(ext)=7x10(5) has been achieved when implemented in the cryomodule test. C1 TJNAF, Newport News, VA 23606 USA. RP Wang, HP (reprint author), TJNAF, Newport News, VA 23606 USA. 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 BN 0-7803-7738-9 PY 2003 BP 1101 EP 1103 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600319 ER PT B AU Wang, H Campisi, I Beard, K Rimmer, R Thomas, C Mammosser, J Preble, J AF Wang, H Campisi, I Beard, K Rimmer, R Thomas, C Mammosser, J Preble, J BE Chew, J Lucas, P Webber, S TI HOM damping performance of JLab SL21 cryomodule SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The SL21 cryomodule is a first 1.5GHz, 12.5MV/m, 7-cell cavity, 8-cavity string superconducting accelerator module produced at JLab. The first two passbands of TE111 and TM110 high order modes (HOM) have to be damped to avoid beam breakup problems at 460muA current. External Q's of the HOM couplers and waveguide were measured on a copper model, on cold niobium cavities in vertical tests and finally in the cryomodule without beam. This paper presents all HOM data and general measurement techniques. A threshold current predicted by MATBBU code based on these data and the 6GeV machine beam optics is 10mA. C1 TJNAF, Newport News, VA 23606 USA. RP Wang, H (reprint author), TJNAF, Newport News, VA 23606 USA. EM haipeng@jlab.org; catherine.thomas-madec@synchrotron-soleil.fr 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 BN 0-7803-7738-9 PY 2003 BP 1104 EP 1106 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600320 ER PT B AU Donley, LI Dooling, JC McMichael, GE AF Donley, LI Dooling, JC McMichael, GE BE Chew, J Lucas, P Webber, S TI Using ferrite as a fast switch for improving rise time of IPNS extraction kicker SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The Kicker system [1-2] is used to extract beam from the Rapid Cycling Synchrotron (RCS). The Kicker consists of four identical pulse circuits, each providing over 3.8 kA to each magnet winding. The magnet length is restricted to the space between vacuum bellows attached to the ring magnets. This leaves 0.89m for the magnet. To keep the voltage low the magnet conductor is broke up into 4, 1/4-turn magnet windings. Each pulse circuit consists of a Pulse Forming Network (PFN) that is charged to 50 KV. The PFN is discharged through a thyratron into a 6.3-ohm transmission line to one of the magnet windings. Our system has always had marginal rise time of around 100 ns. Although the thyratron switching time is much faster than this, losses in the transmission lines cause the slower response. By using ferrite to make a fast switch between the transmission lines and the magnet, the rise time in the magnet can be reduced. To make a fast ferrite switch, the saturation point must carefully be chosen. Parameters related to choosing the proper ferrite to provide fast saturation, at the correct current will be discussed. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Donley, LI (reprint author), Argonne Natl Lab, Argonne, IL 60439 USA. 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 BN 0-7803-7738-9 PY 2003 BP 1159 EP 1161 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600340 ER PT B AU Borovina, DL Bradley, JT Pieck, M Przeklasa, RS Hardek, TW Lynch, MT Rees, DE Tallerico, PJ Reass, WA Wender, SA Takala, BE Ruggles, SC AF Borovina, DL Bradley, JT Pieck, M Przeklasa, RS Hardek, TW Lynch, MT Rees, DE Tallerico, PJ Reass, WA Wender, SA Takala, BE Ruggles, SC BE Chew, J Lucas, P Webber, S TI Neutron-induced failure tests of 3300-V IGBTS for the spallation neutron source accelerator SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The RF transmitters for the 1-GeV Spallation Neutron Source (SNS) linear accelerator are powered by 15 converter-modulator stations. Each converter-modulator provides pulses up to I I MW peak power with a 1.1 MW average power to a multiple-klystron load. A low-voltage switching network, comprised of three sets of four IGBTs in an 'H-bridge' configuration, is used to generate the 20 kHz drive waveform components for the three step-up transformer primaries. This setup brings the total number of 3300-volt semiconductor IGBTs operating within the accelerator at 180. When biased to operating voltages of 1500 V or greater, all IGBTs are inherently sensitive to neutron interactions caused by background cosmic ray radiation. The project described used neutrons produced by proton spallation (with a similar spectrum as cosmic ray neutrons) to gain knowledge of failure mechanisms of the SNS IGBTs. These tests were performed using the highly accelerated neutron flux generated at the Weapons Neutron Research facility at the Los Alamos National Laboratory. The results of these experiments have shown the existence of a critical threshold voltage that lies within the operational range beyond which the IGBTs are no longer effective. This threshold varied with each brand of IGBT tested. Statistical failure times have also been projected for all brands of IGBT tested under normal biased operation with the SNS accelerator given natural neutron flux in Oak Ridge, TN. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Borovina, DL (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 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 0-7803-7738-9 PY 2003 BP 1168 EP 1170 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600343 ER PT B AU Waldron, W Greenway, W Eylon, S Henestroza, E Yu, S AF Waldron, W Greenway, W Eylon, S Henestroza, E Yu, S BE Chew, J Lucas, P Webber, S TI Electrical breakdown studies with Mycalex insulators SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Insulating materials such as alumina and glass-bonded mica (Mycalex) are used in accelerator systems for high voltage feedthroughs, structural supports, and barriers between high voltage insulating oil and the vacuum beam pipe in induction accelerator cells. Electric fields in the triple points should be minimized to prevent voltage breakdown. Mechanical stress can compromise seals and result in oil contamination of the insulator surface. We have tested various insulator cleaning procedures including ultrasonic cleaning with a variety of aqueous-based detergents, and manual scrubbing with various detergents. Water sheeting tests were used to determine the initial results of the cleaning methods. Ultimately, voltage breakdown tests will be used to quantify the benefits of these cleaning procedures. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Waldron, W (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. 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 BN 0-7803-7738-9 PY 2003 BP 1171 EP 1173 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600344 ER PT B AU Leyh, GE AF Leyh, GE BE Chew, J Lucas, P Webber, S TI A critical analysis of IGBT geometries, with the intention of mitigating undesirable destruction caused by fault scenarios of an adverse nature SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB Megawatt class Insulated Gate Bipolar Transistors [IGBTs] find many uses in industrial applications such as traction drives, induction heating and power factor correction. At present, these devices are not optimized for higher speed pulsed-power applications, such as kicker magnets or klystron modulators. This paper identifies fundamental issues that limit the dI/dt performance of standard commercial packages, and investigates several IGBT design optimizations that significantly improve high-speed performance at high peak power levels. The paper presents design concepts, results of electromagnetic simulations, and performance data of actual prototypes under high dI/dt conditions. C1 SLAC, Menlo Pk, CA 94304 USA. RP Leyh, GE (reprint author), SLAC, Menlo Pk, CA 94304 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 BN 0-7803-7738-9 PY 2003 BP 1174 EP 1176 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600345 ER PT B AU Horan, D Cherbak, E AF Horan, D Cherbak, E BE Chew, J Lucas, P Webber, S TI Fast-ferrite tuner operation on a 352-MHz single-cell RF cavity at the advanced photon source SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB A 352-MHz fast-ferrite tuner, manufactured by Advanced Ferrite Technology, was tested on a single-cell rf cavity at the Advanced Photon Source. Low-power rf testing was performed on the tuner-cavity combination to evaluate tuning range, bandwidth, stability, and compatibility with existing Advanced Photon Source low-level rf hardware. The test system comprises a single-cell copper rf cavity, a bipolar DC bias supply for the ferrite tuner, a water flow and temperature metering and interlock system, and a low-level rf cavity tuning loop consisting of an rf phase detector and a PID amplifier. Test data will be presented. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Horan, D (reprint author), Argonne Natl Lab, Argonne, IL 60439 USA. RI Dom, Rekha/B-7113-2012 NR 1 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 1177 EP 1179 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600346 ER PT B AU Norem, J Hassanein, A Konkashbaev, I AF Norem, J Hassanein, A Konkashbaev, I BE Chew, J Lucas, P Webber, S TI Mechanisms limiting high gradient RF cavities SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The specific mechanisms responsible for breakdown of if cavities have been widely debated. A large number of different processes are thought to be involved, including field emission, surface contamination, mechanical stresses, plasma effects, explosive electron emission, a variety of heating mechanisms, mechanical imperfections, surface structure and chemical composition. We are attempting to model the surface effects that limit the operation of high gradient if cavities using the HEIGHTS package. Models of individual processes are being developed and compared, in an attempt to evaluate the relative importance of these effects, specifically for the case of low frequency (200 - 800 MHz.) copper cavities, but probably applicable to other materials and frequencies. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Norem, J (reprint author), Argonne Natl Lab, Argonne, IL 60439 USA. 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 0-7803-7738-9 PY 2003 BP 1180 EP 1182 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600347 ER PT B AU Norem, J Gruber, P Bross, A Geer, S Moretti, A Qian, Z Kaplan, DM Torun, Y Rimmer, R Li, DR Zisman, M AF Norem, J Gruber, P Bross, A Geer, S Moretti, A Qian, Z Kaplan, DM Torun, Y Rimmer, R Li, DR Zisman, M BE Chew, J Lucas, P Webber, S TI Dark current and x ray measurements of an 805 MHz pillbox cavity SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The muon cooling systems proposed for neutrino factories require low frequency (201 MHz) RF cavities with Be windows, at high gradient (E-acc similar to 16 MV/m), in strong solenoidal magnetic field (similar to 5 T). For the proposed Muon Ionization Cooling Experiment (MICE) [1], an experimental demonstration of cooling, we have an additional constraint that we must operate sensitive particle detectors very close to the RF cavities, which produce backgrounds from dark currents and x rays. To understand the processes involved in cavity conditioning and operation near particle detectors, we have constructed a test facility at Lab G of Fermilab, where a 5 Tesla superconducting solenoid, a 14 MW peak power klystron and a pillbox test cavity at 805 MHz are available. We present measurements of dark currents, x rays and surface structure from the pillbox cavity, with both copper and beryllium endplates, and discuss the interaction between surface structure and radiation backgrounds produced. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Norem, J (reprint author), Argonne Natl Lab, Argonne, IL 60439 USA. OI Torun, Yagmur/0000-0003-2336-6585 NR 2 TC 4 Z9 4 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 1183 EP 1185 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600348 ER PT B AU Rose, J Doyuran, A Graves, W Loos, H Shaftan, T Sheehy, B Wu, Z AF Rose, J Doyuran, A Graves, W Loos, H Shaftan, T Sheehy, B Wu, Z BE Chew, J Lucas, P Webber, S TI Radio frequency control system for the duvfel SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB A new RF control system was designed and implemented to support short pulse High Gain Harmonic Generation (HGHG) experiments, which require sub-picosecond synchronization between the laser and the accelerating RF fields'. This control system consists of a 81MHz crystal oscillator to drive both the Ti::Sapphire laser and a 2856 MHz synthesizer, direct vector modulators that control the amplitude and phase of the klystron drive and vector de-modulators for amplitude and phase measurement. RF and electron beam based measurement results of the RF to laser jitter are presented as well as experimental results of synthesizing the RF directly from the 81.6 MHz pump laser pulse train. C1 BNL, Upton, NY 11973 USA. RP Rose, J (reprint author), BNL, Upton, NY 11973 USA. RI Shaftan, Timur/A-8443-2009; OI Loos, Henrik/0000-0001-5085-0562 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 0-7803-7738-9 PY 2003 BP 1192 EP 1194 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600351 ER PT B AU Zaltsman, A Blaskiewicz, M Brennan, J Brodowski, J Butler, J Meth, M Severino, F Smith, K Spitz, R AF Zaltsman, A Blaskiewicz, M Brennan, J Brodowski, J Butler, J Meth, M Severino, F Smith, K Spitz, R BE Chew, J Lucas, P Webber, S TI Progress in the development of high level RF for the SNS ring SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB A High Level RF (HLRF) system consisting of power amplifiers (PA's) and ferrite loaded cavities is being built by Brookhaven National Laboratory (BNL) for the Spallation Neutron Source (SNS) project. Four cavities were built and are being tested. Each cavity has two gaps with a design voltage of 10 kV per gap and will be driven by a PA directly adjacent to it. The PA uses a 600kW tetrode to provide the necessary drive current. All the PA's were built and are being tested at BNL prior to shipping to ORNL. A dynamic tuning scheme used to help compensate for the effect of beam loading was implemented and tested. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Zaltsman, A (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 5 TC 0 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 1195 EP 1197 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600352 ER PT B AU Dey, J Dris, S Kubicki, T Reid, J AF Dey, J Dris, S Kubicki, T Reid, J BE Chew, J Lucas, P Webber, S TI Linearization of the fermilab recycler high level RF SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB In studying the Recycler high level RF, it was found that at 89 kHz, the lowest frequency required by the system, some nonlinearities in magnitude and phase were discovered. The visible evidence of this was that beam injected in a barrier bucket had a definite slope at the top. Using a network analyzer, the S-parameter S-21 was realized for the overall system and from mathematical modeling a second order numerator and denominator transfer function was found. The inverse of this transfer function gives our linearization transfer function. The linearization transfer function was realized in hardware by summing a high pass, band pass and low pass filter together. The resulting magnitude and phase plots, along with actual beam response will be shown. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Dey, J (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 1 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 1204 EP 1206 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600355 ER PT B AU Gonin, I Finley, D Khabiboulline, T Solyak, N AF Gonin, I Finley, D Khabiboulline, T Solyak, N BE Chew, J Lucas, P Webber, S TI Coupler design for NLC/JLC accelerating structures SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB In the framework of the NLC/JLC collaboration, Fermilab is working on developing the technology for X-band accelerating structures. One key element of a structure is the input/output coupler. The coupler should provide not only good power transmission from the waveguide to the structure, but also should not limit the high gradient performance of the accelerating structure itself. There are other special requirements for designing high power input/output couplers: reliability; cost; sensitivity to errors; trapped HOM; etc. In this paper we discuss the HFSS simulation of different types of couplers for JLC/NLC accelerating structures. We compare the surface electric and magnetic fields, field asymmetries, pulsed heating, presence of trapped modes and the complexity of production. Results of RF measurements and high gradient tests show good agreement with the design parameters. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Gonin, I (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. NR 3 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-7738-9 PY 2003 BP 1207 EP 1209 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600356 ER PT B AU Khabiboulline, T Arkan, T Borissov, E Carter, H Finley, D Boffo, C Gonin, I Romanov, G Smith, B Solyak, N AF Khabiboulline, T Arkan, T Borissov, E Carter, H Finley, D Boffo, C Gonin, I Romanov, G Smith, B Solyak, N BE Chew, J Lucas, P Webber, S TI Development of X-band accelerating structures at fermilab SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The RF Technology Development group at Fermilab is working together with the NLC and JLC groups at SLAC and KEK on developing technology for room temperature X-band accelerating structures [1] for a future linear collider. We have built a few 60cm long, high phase advance, detuned structures (HDS or FXB series). These structures have 150 degrees phase advance per cell, and are intended for high gradient tests. The structures were brazed in a vacuum furnace with a partial pressure of argon, rather than in a hydrogen atmosphere. We have also begun to build 60cm long, damped and detuned structures (HDDS or FXC series). Our goal is to build many structures for the 8-pack test at SLAC by the end of 2003, as part of the JLC/NLC effort to demonstrate the readiness of room temperature RF technology for a linear collider. This paper describes the design, fabrication techniques, RF measurements and tuning, as well as the initial results from high gradient testing of an FXB structure. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Khabiboulline, T (reprint author), Fermilab Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA. 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 0-7803-7738-9 PY 2003 BP 1210 EP 1212 PG 3 WC Physics, Particles & Fields SC Physics GA BY93J UT WOS:000189498600357 ER PT B AU Solyak, N Gonin, I Edwards, H Foley, M Khabiboulline, T Mitchell, D Reid, J Simmons, L AF Solyak, N Gonin, I Edwards, H Foley, M Khabiboulline, T Mitchell, D Reid, J Simmons, L BE Chew, J Lucas, P Webber, S TI Development of the third harmonic SC cavity at fermilab SO PROCEEDINGS OF THE 2003 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-5 LA English DT Proceedings Paper CT 20th Biennial Particle Accelerator Conference CY MAY 12-16, 2003 CL Portland, OR SP Stanford Linear Accelerator Ctr, Lawrence Berkeley Natl Lab, IEEE, Nucl & Plasma Sci Soc, Amer Phys Soc, Div Phys Beams, US DOE, USN Off Naval Res, Natl Sci Fdn AB The third harmonic 3.9 GHz superconducting cavity was recently proposed by DESY for a new generation of high brightness photo-injector (TTF photoinjector-2) to compensate nonlinear distortion of the longitudinal phase space due to RF curvature of the 1.3 GHz TESLA cavities [1,2]. Installation of the 3(rd) harmonic cavity will allow us to generate ultra-short (<50 mu m rms) highly charged electron bunches with an extremely small transverse normalized emittance (