FN Thomson Reuters Web of Science™ VR 1.0 PT B AU Forsberg, C Bischoff, B Mansur, LK Trowbridge, L AF Forsberg, C Bischoff, B Mansur, LK Trowbridge, L GP Oecd TI Nuclear thermochemical production of hydrogen with a lower-temperature iodine-Westinghouse-ISPRA sulfur process SO NUCLEAR PRODUCTION OF HYDROGEN LA English DT Proceedings Paper CT 2nd Information Exchange Meeting on Nuclear Production of Hydrogen CY OCT 02-03, 2003 CL Argonne, IL SP OECD Nucl Energy Agcy AB Thermochemical processes are the primary candidates to produce hydrogen (H-2) using high-temperature heat from nuclear reactors. The leading thermochemical processes have the same high-temperature chemical reaction (dissociation of sulphuric acid into H2O, O-2, and SOD and thus all require heat inputs at temperatures of -850degreesC. The processes differ in that they have different lower-temperature chemical reactions. The high temperatures are at the upper limits of high-temperature nuclear reactor technology. If peak temperatures can be reduced by 100 to 150degreesC, existing reactor technology can be used to provide the necessary heat for H-2 production and the H-2 produced using nuclear reactors becomes a much more viable near-term industrial option. If process pressures can be increased, significant reductions in capital cost and improvements in efficiency may be possible. The use of inorganic separation membranes is proposed to drive the dissociation reaction to completion at lower temperatures and higher pressures. ORNL has developed a variety of inorganic membranes for commercial applications and has initiated a program to develop a membrane to separate SO3 from its dissociation products. The basis for using such membranes is described herein. A test loop is being constructed, and membrane testing is expected to be initiated before the end of 2003. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Forsberg, C (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. NR 10 TC 0 Z9 0 U1 0 U2 0 PU ORGANIZATION ECONOMIC COOPERATION & DEVELOPMENT PI PARIS PA 2, RUE ANDRE PASCAL, CEDEX 16, 75775 PARIS, FRANCE BN 92-64-10770-3 PY 2004 BP 159 EP 169 PG 11 WC Energy & Fuels; Nuclear Science & Technology SC Energy & Fuels; Nuclear Science & Technology GA BAF76 UT WOS:000222029300012 ER PT B AU Herring, JS Lessing, P O'Brien, JE Stoots, C Hartvigsen, J Elangovan, S AF Herring, JS Lessing, P O'Brien, JE Stoots, C Hartvigsen, J Elangovan, S GP Oecd TI Hydrogen production through high-temperature electrolysis in a solid oxide cell SO NUCLEAR PRODUCTION OF HYDROGEN LA English DT Proceedings Paper CT 2nd Information Exchange Meeting on Nuclear Production of Hydrogen CY OCT 02-03, 2003 CL Argonne, IL SP OECD Nucl Energy Agcy AB An experimental research programme is being conducted by the INEEL and Ceramatec, Inc., to test the high-temperature, electrolytic production of hydrogen from steam using a solid oxide cell. The research team is designing and testing solid oxide cells for operation in the electrolysis mode, producing hydrogen using a high-temperature heat and electrical energy. The high-temperature heat and the electrical power would be supplied simultaneously by a high-temperature nuclear reactor. Operation at high temperature reduces the electrical energy requirement for electrolysis and also increases the thermal efficiency of the power-generating cycle. The high-temperature electrolysis process will utilise heat from a specialised secondary loop carrying a steam/hydrogen mixture. It is expected that, through the combination of a high-temperature reactor and high-temperature electrolysis, the process will achieve an overall thermal conversion efficiency of 40 to 50% while avoiding the challenging chemistry and corrosion issues associated with the thermochemical processes. Planar solid oxide cell technology is being utilised because it has the best potential for high efficiency due to minimised voltage and current losses. These losses also decrease with increasing temperature. Initial testing has determined the performance of single "button" cells. Subsequent testing will investigate the performance of multiple-cell stacks operating in the electrolysis mode. Testing is being performed both at Ceramatec and at INEEL. The first cells to be tested were single cells based on existing materials and fabrication technology developed at Ceramatec for production of solid oxide fuel cells. These cells use a relatively thick (similar to175 mum) electrolyse of yttria- or scandia-stabilised zirconia, with nickel-zirconia cermet anodes and strontium-doped lanthanum manganite cathodes. Additional custom cells with lanthanum gallate electrolyte have been developed and tested. Results to date have shown an area specific resistance (ASR) of 0.45 Omega cm(2) at 850degreesC, and produced 73% H-2:27%H2O from a 50:50 input stream. Our most recent results from a six-cell stack show a production of 35 normal liters/hr for a duration of 360 hours. The stack test is continuing. The critical parameters for a 300 MWhydrogen commercial electrolysis plant have been determined, based on these experimental results. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID USA. RP Herring, JS (reprint author), Idaho Natl Engn & Environm Lab, Idaho Falls, ID USA. NR 2 TC 0 Z9 0 U1 2 U2 6 PU ORGANIZATION ECONOMIC COOPERATION & DEVELOPMENT PI PARIS PA 2, RUE ANDRE PASCAL, CEDEX 16, 75775 PARIS, FRANCE BN 92-64-10770-3 PY 2004 BP 183 EP 200 PG 18 WC Energy & Fuels; Nuclear Science & Technology SC Energy & Fuels; Nuclear Science & Technology GA BAF76 UT WOS:000222029300014 ER PT B AU Balachandran, U Lee, TH Wang, S Dorris, SE AF Balachandran, U Lee, TH Wang, S Dorris, SE GP Oecd TI Hydrogen production by water dissociation using mixed conducting membranes SO NUCLEAR PRODUCTION OF HYDROGEN LA English DT Proceedings Paper CT 2nd Information Exchange Meeting on Nuclear Production of Hydrogen CY OCT 02-03, 2003 CL Argonne, IL SP OECD Nucl Energy Agcy AB Water dissociates into oxygen and hydrogen at high temperatures: H2O(g) double left right arrow H-2 + 1/2 O-2 The problem with exploiting this reaction is that very low concentrations of hydrogen and oxygen are generated even at relatively high temperatures (e.g., only 0.1 and 0.042% for hydrogen and oxygen, respectively, at 1 600degreesC), because the equilibrium constant for this reaction is small. However, significant amounts of hydrogen or oxygen can be generated at moderate temperatures if the equilibrium is shifted toward dissociation by either oxygen or hydrogen removal using a mixed-conducting (both electrons and ions) membrane. We have studied hydrogen production from water splitting at moderate temperatures (700-900degreesC) with novel mixed-conducting membranes. Hydrogen production rates were investigated as a function of temperature, water partial pressure, membrane thickness, and oxygen chemical potential gradient across the membranes. The hydrogen production rate increased with both increasing moisture concentration and oxygen chemical potential gradient. A hydrogen production rate of 6 cm(3)(STP)/min-cm(2) was measured with a 0.10 mm-thick membrane at 900degreesC using 50 vol.% water vapour on one side of the membrane and 80% hydrogen (balance helium) on the other side. The hydrogen production rate increased with decreasing membrane thickness, but surface kinetics played an important role as the membrane thickness decreased. In these experiments, hydrogen was used as a model gas to establish a high oxygen potential gradient; however, another reducing gas, such as methane, could be substituted to maintain the high oxygen potential gradient. With methane as a feed gas, hydrogen would be produced on one side of the membrane, while synthesis gas would be produced on the other side. Detailed results of hydrogen production from water splitting with mixed-conducting membranes will be presented in this talk. C1 Argonne Natl Lab, Energy Technol Div, Argonne, IL 60439 USA. RP Balachandran, U (reprint author), Argonne Natl Lab, Energy Technol Div, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 0 TC 0 Z9 0 U1 1 U2 2 PU ORGANIZATION ECONOMIC COOPERATION & DEVELOPMENT PI PARIS PA 2, RUE ANDRE PASCAL, CEDEX 16, 75775 PARIS, FRANCE BN 92-64-10770-3 PY 2004 BP 201 EP 201 DI 10.1787/9789264107717-16-en PG 1 WC Energy & Fuels; Nuclear Science & Technology SC Energy & Fuels; Nuclear Science & Technology GA BAF76 UT WOS:000222029300015 ER PT B AU Kumar, A AF Kumar, Arvind BA Krepon, M BF Krepon, M TI MISSILE DEFENSE AND STRATEGIC MODERNIZATION IN SOUTHERN ASIA SO NUCLEAR RISK REDUCTION IN SOUTH ASIA LA English DT Article; Book Chapter C1 [Kumar, Arvind] Natl Inst Adv Studies, Bangalore, Karnataka, India. [Kumar, Arvind] Univ Delhi, Delhi 110007, India. [Kumar, Arvind] Sandia Natl Labs, Cooperat Monitoring Ctr, Livermore, CA 94550 USA. RP Kumar, A (reprint author), Natl Inst Adv Studies, Bangalore, Karnataka, India. NR 23 TC 0 Z9 0 U1 0 U2 0 PU PALGRAVE PI BASINGSTOKE PA HOUNDMILLS, BASINGSTOKE RG21 6XS, ENGLAND BN 978-1-4039-8168-4 PY 2004 BP 209 EP 222 D2 10.1057/9781403981684 PG 14 WC International Relations; Political Science SC International Relations; Government & Law GA BQE71 UT WOS:000280796600013 ER PT J AU Aliberti, G Palmiotti, G Salvatores, M Stenberg, CG AF Aliberti, G Palmiotti, G Salvatores, M Stenberg, CG TI Impact of nuclear data uncertainties on transmutation of actinicles in accelerator-driven assemblies SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article ID GENERALIZED PERTURBATION-THEORY AB The potential impact of nuclear data uncertainties on a large number of performance parameters of reactor cores dedicated to the transmutation of radioactive wastes is discussed. An uncertainty analysis has been performed based on sensitivity theory, which underlines the cross sections, the energy range, and the isotopes that are responsible for the most significant uncertainties. To provide guidelines on priorities for new evaluations or validation experiments, required accuracies on specific nuclear data have been derived, accounting for target accuracies on major design parameters. The required accuracies (mostly in the energy region below 20 MeV), in particular for minor actinide data, are of the same order of magnitude of the achieved accuracies on major actinides. Specific requirements also concern the improvement of minor actinide data related to decay heat and effective delayed-neutron fraction assessment. C1 Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA. RP Aliberti, G (reprint author), Argonne Natl Lab, Nucl Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA. EM massimo.salvatores@cea.fr NR 29 TC 86 Z9 87 U1 0 U2 2 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD JAN PY 2004 VL 146 IS 1 BP 13 EP 50 PG 38 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 761LM UT WOS:000187910300002 ER PT J AU Favorite, JA AF Favorite, JA TI Using the Schwinger variational functional for the solution of inverse transport problems SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article AB A new iterative inverse method for gamma-ray transport problems is presented. The method, based on a novel application of the Schwinger variational functional, is developed as a perturbation problem in which the current model (in the iterative process) is considered the initial, unperturbed system, and the actual model is considered the perturbed system. The new method requires the solution of a set of uncoupled one-group forward and adjoint transport equations in each iteration. Four inverse problems are considered: determination of (a) interface locations in a multilayer source/shield system, (b) the isotopic composition of an unknown source (including inert elements), (c) interface locations and the source composition simultaneously, and (d) the composition of an unknown layer in the shield. Only the first two problems were actually solved in numerical one-dimensional (spherical) test cases. The method worked well for the unknown interface location problem and extremely well for the unknown source composition problem. Convergence of the method was heavily dependent on the initial guess. C1 Los Alamos Natl Lab, Div Appl Phys, Diagnost Appl Grp, Los Alamos, NM 87545 USA. RP Favorite, JA (reprint author), Los Alamos Natl Lab, Div Appl Phys, Diagnost Appl Grp, Los Alamos, NM 87545 USA. EM fave@lanl.gov NR 14 TC 15 Z9 15 U1 0 U2 1 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD JAN PY 2004 VL 146 IS 1 BP 51 EP 70 PG 20 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 761LM UT WOS:000187910300003 ER PT J AU Peplow, DE Sulfredge, CD Sanders, RL Morris, RH Hann, TA AF Peplow, DE Sulfredge, CD Sanders, RL Morris, RH Hann, TA TI Calculating nuclear power plant vulnerability using integrated geometry and event/fault-tree models SO NUCLEAR SCIENCE AND ENGINEERING LA English DT Article AB Since the events of September 11, 2001, the vulnerability of nuclear power plants to terrorist attacks has become a national concern. The results of vulnerability analysis are greatly influenced by the computational approaches used. Standard approximations used in fault-tree analysis are not applicable for attacks, where high component failure probabilities are expected; two methods that do work with high failure probabilities are presented. Different blast modeling approaches can also affect the end results. Modeling the structural details of facility buildings and the geometric layout of components within the buildings is required to yield meaningful results. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Peplow, DE (reprint author), Oak Ridge Natl Lab, POB 2008,Bldg 5700,MS 6172, Oak Ridge, TN 37831 USA. EM peplowde@ornl.gov NR 14 TC 6 Z9 6 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5639 J9 NUCL SCI ENG JI Nucl. Sci. Eng. PD JAN PY 2004 VL 146 IS 1 BP 71 EP 87 PG 17 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 761LM UT WOS:000187910300004 ER PT J AU Rohatgi, US Jo, JH Chung, BD Takahashi, H Downar, TJ AF Rohatgi, US Jo, JH Chung, BD Takahashi, H Downar, TJ TI Steam line break and station blackout transients for proliferation-resistant hexagonal tight lattice boiling water reactor SO NUCLEAR TECHNOLOGY LA English DT Article AB Safety analyses of a proliferation-resistant, economically competitive, high-conversion boiling water reactor (HCBWR) fueled with fissile plutonium and fertile thorium oxidefuel elements, and with passive safety systems, are presented here. The HCBWR developed here is characterized by a very tight lattice with a relatively small water volume fraction in the core that therefore operates with a fast reactor neutron spectrum and a considerably improved neutron economy compared to the current generation of light water reactors. The tight lattice core has a very narrow flow channel with a hydraulic diameter less than half of the regular boiling water reactor (BWR) core and, thus, presents a special challenge to core cooling because of reduced water inventory and high friction in the core. The primary safety concern when reducing the moderator-to-fuel ratio and when using a tightly packed lattice arrangement is to maintain adequate cooling of the core during both normal operation and accident scenarios. In the preliminary HCBWR design, the core is placed in a vessel with a large chimney section, and the vessel is connected to the isolation condenser system (ICS). The vessel is placed in containment with the gravity driven cooling system (GDCS) and passive containment cooling system (PCCS) in a configuration similar to General Electric's simplified BWR (SBWR). The safety systems are similar to those of the SBWR; the ICS and PCCS are scaled with power. An internal recirculation pump is placed in the downcomer to augment the buoyancy head provided by the chimney since the buoyancy provided by the chimney alone could not generate sufficient recirculation in the vessel as the tight lattice configuration results in much larger friction in the core than with the SBWR. The constitutive relationships for RELAP5 are assessed for narrow channels, and as a result the heat transfer package is modified. The modified RELAP5 is used to simulate and analyze two of the most limiting events for a tight pitch lattice core: the station blackout and the main-steam-line-break events. The results of the analyses indicate that the HCBWR system will be safely brought to the shutdown condition for these transients. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Purdue Univ, Sch Nucl Engn, W Lafayette, IN 47906 USA. RP Rohatgi, US (reprint author), Brookhaven Natl Lab, Bldg 475B, Upton, NY 11973 USA. EM rohatgi@bnl.gov NR 11 TC 0 Z9 0 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD JAN PY 2004 VL 145 IS 1 BP 18 EP 27 PG 10 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 762ZH UT WOS:000188042000003 ER PT J AU Polkinghorne, ST Sharp, GL McCracken, RT AF Polkinghorne, ST Sharp, GL McCracken, RT TI Feasibility of increasing the advanced test reactor's maximum lobe power by adding an accumulator injection system SO NUCLEAR TECHNOLOGY LA English DT Article AB The Advanced Test Reactor (ATR) is a 250-MW irradiation facility used to test reactor fuels and other materials, and also to produce radioisotopes. The ATR core is divided into five regions, or lobes, that normally operate at different power levels. To support future irradiation programs, it is desired that the maximum lobe power be increased 10% (from 60 to 66 MW). A modification to ATR's emergency core cooling system is proposed to ensure that adequate safety margins would be maintained during a loss-of-coolant accident (LOCA). The modification being considered is the addition of an accumulator injection system. The RELAP5 thermalhydraulic code and the SINDA thermal analyzer were used to simulate the two most challenging design-basis LOCAs identified in the ATR Saftey Analysis Report. Calculations were peformed both with and without accumulator injection. The results indicate that a 10% increase in maximum lobe power is achievable. Minimum thermal margins increased more than 40% when accumulator injection was simulated. C1 Bechtel BWXT Idaho, Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Polkinghorne, ST (reprint author), Bechtel BWXT Idaho, Idaho Natl Engn & Environm Lab, LLC,POB 1625, Idaho Falls, ID 83415 USA. EM stp@inel.gov NR 8 TC 1 Z9 1 U1 0 U2 0 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD JAN PY 2004 VL 145 IS 1 BP 44 EP 56 PG 13 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 762ZH UT WOS:000188042000005 ER PT J AU Ahluwalia, RK Hua, TQ DeeEarl, V AF Ahluwalia, RK Hua, TQ DeeEarl, V TI Uranium transport in a high-throughput electrorefiner for EBR-II blanket fuel SO NUCLEAR TECHNOLOGY LA English DT Article AB A unique high-throughput Mk-V electrorefiner is being used in the electrometallurgical treatment of the metallic sodium-bonded blanket fuel from the Experimental Breeder Reactor II. Over many cycles, it transports uranium back and forth between the anodic fuel dissolution baskets and the cathode tubes until, because of imperfect adherence of the dendrites, it all ends up in the product collector at the bottom. The transport behavior of uranium in the high-throughput electrorefiner can be understood in terms of the sticking coefficients for uranium adherence to the cathode tubes in the forward direction and to the dissolution baskets in the reverse direction. The sticking coefficients are inferred from the experimental voltage and current traces and are correlated in terms of a single parameter representing the ratio of the cell current to the limiting current at the surface acting as the cathode. The correlations are incorporated into an engineering model that calculates the transport of uranium in the different modes of operation. The model also uses the experimentally derived electrorefiner operating maps that describe the relationship between the cell voltage and the cell current for the three principal transport modes. It is shown that the model correctly simulates the cycle-to-cycle variation of the voltage and current profiles. The model is used to conduct a parametric study of electrorefiner throughput rate as a function of the principal operating parameters. The throughput rate is found to improve with lowering of the basket rotation speed, reduction of UCl3 concentration in salt, and increasing the maximum cell current or cut-off voltage. Operating conditions are identified that can improve the throughput rate by 60 to 70% over that achieved at present. C1 Argonne Natl Lab, Nucl Engn Div, Argonne, IL 60439 USA. Argonne Natl Lab, Div Engn Technol, Argonne, IL 60439 USA. RP Ahluwalia, RK (reprint author), Argonne Natl Lab, Nucl Engn Div, 9700 S Cass Ave, Argonne, IL 60439 USA. EM hua@anl.gov NR 5 TC 9 Z9 9 U1 1 U2 3 PU AMER NUCLEAR SOCIETY PI LA GRANGE PK PA 555 N KENSINGTON AVENUE, LA GRANGE PK, IL 60526 USA SN 0029-5450 J9 NUCL TECHNOL JI Nucl. Technol. PD JAN PY 2004 VL 145 IS 1 BP 67 EP 81 PG 15 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 762ZH UT WOS:000188042000007 ER PT J AU Miller, KA Sawicka, D Barsky, D Albala, JS AF Miller, KA Sawicka, D Barsky, D Albala, JS TI Domain mapping of the Rad51 paralog protein complexes SO NUCLEIC ACIDS RESEARCH LA English DT Article ID DNA-REPAIR GENE; RECOMBINATIONAL REPAIR; STRAND EXCHANGE; MOUSE GENES; HUMAN-CELLS; XRCC3; IDENTIFICATION; FAMILY; BINDING; MEMBER AB The five human Rad51 paralogs are suggested to play an important role in the maintenance of genome stability through their function in DNA double-strand break repair. These proteins have been found to form two distinct complexes in vivo, Rad51B-Rad51C-Rad51D-Xrcc2 (BCDX2) and Rad51C-Xrcc3 (CX3). Based on the recent Pyrococcus furiosus Rad51 structure, we have used homology modeling to design deletion mutants of the Rad51 paralogs. The models of the human Rad51B, Rad51C, Xrcc3 and murine Rad51D (mRad51D) proteins reveal distinct N-terminal and C-terminal domains connected by a linker region. Using yeast two-hybrid and co-immunoprecipitation techniques, we have demonstrated that a fragment of Rad51B containing amino acid residues 1-75 interacts with the C-terminus and linker of Rad51C, residues 79-376, and this region of Rad51C also interacts with mRad51D and Xrcc3. We have also determined that the N-terminal domain of mRad51D, residues 4-77, binds to Xrcc2 while the C-terminal domain of mRad51D, residues 77-328, binds Rad51C. By this, we have identified the binding domains of the BCDX2 and CX3 complexes to further characterize the interaction of these proteins and propose a scheme for the three-dimensional architecture of the BCDX2 and CX3 paralog complexes. C1 Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, Livermore, CA 94550 USA. RP Albala, JS (reprint author), Lawrence Livermore Natl Lab, Biol & Biotechnol Res Program, 7000 East Ave,L-448, Livermore, CA 94550 USA. EM albala1@llnl.gov FU NCI NIH HHS [R55 CA081019, CA-81019-02, R01 CA081019] NR 57 TC 42 Z9 50 U1 0 U2 2 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PD JAN PY 2004 VL 32 IS 1 BP 169 EP 178 DI 10.1093/nar/gkg925 PG 10 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 774NE UT WOS:000188988700033 PM 14704354 ER PT J AU Qu, YX Guo, JT Olman, V Xu, Y AF Qu, YX Guo, JT Olman, V Xu, Y TI Protein structure prediction using sparse dipolar coupling data SO NUCLEIC ACIDS RESEARCH LA English DT Article ID DE-NOVO DETERMINATION; PHOSPHORYL TRANSFER COMPLEX; LIQUID-CRYSTALLINE PHASE; CHEMICAL-SHIFT INDEX; DNA-BINDING DOMAIN; N-TERMINAL DOMAIN; SECONDARY STRUCTURE; NMR STRUCTURE; BACKBONE STRUCTURE; ORIENTED MACROMOLECULES AB Residual dipolar coupling (RDC) represents one of the most exciting emerging NMR techniques for protein structure studies. However, solving a protein structure using RDC data alone is still a highly challenging problem. We report here a computer program, RDC-PROSPECT, for protein structure prediction based on a structural homolog or analog of the target protein in the Protein Data Bank (PDB), which best aligns with the N-15-H-1 RDC data of the protein recorded in a single ordering medium. Since RDC-PROSPECT uses only RDC data and predicted secondary structure information, its performance is virtually independent of sequence similarity between a target protein and its structural homolog/analog, making it applicable to protein targets beyond the scope of current protein threading techniques. We have tested RDC-PROSPECT on all N-15-H-1 RDC data (representing 43 proteins) deposited in the BioMagResBank (BMRB) database. The program correctly identified structural folds for 83.7% of the target proteins, and achieved an average alignment accuracy of 98.1% residues within a four-residue shift. C1 Univ Georgia, Dept Biochem & Mol Biol, Computat Syst Biol Lab, Athens, GA 30602 USA. Oak Ridge Natl Lab, Computat Biol Inst, Oak Ridge, TN 37831 USA. RP Xu, Y (reprint author), Univ Georgia, Dept Biochem & Mol Biol, Computat Syst Biol Lab, Athens, GA 30602 USA. EM xyn@bmb.uga.edu NR 100 TC 15 Z9 16 U1 0 U2 5 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PD JAN PY 2004 VL 32 IS 2 BP 551 EP 561 DI 10.1093/nar/gkh204 PG 11 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 774NH UT WOS:000188989000026 PM 14744980 ER PT J AU Georgakilas, AG Bennett, PV Wilson, DM Sutherland, BM AF Georgakilas, AG Bennett, PV Wilson, DM Sutherland, BM TI Processing of bistranded abasic DNA clusters in gamma-irradiated human hematopoietic cells SO NUCLEIC ACIDS RESEARCH LA English DT Article ID BASE-EXCISION-REPAIR; DOUBLE-STRAND BREAKS; APURINIC APYRIMIDINIC SITES; AVERAGE LENGTH ANALYSIS; ESCHERICHIA-COLI; IONIZING-RADIATION; MAMMALIAN-CELLS; MAJOR HUMAN; DEOXYRIBONUCLEIC-ACID; GEL-ELECTROPHORESIS AB Clustered DNA damages-two or more lesions on opposing strands and within one or two helical turns-are formed in cells by ionizing radiation or radiomimetic antitumor drugs. They are hypothesized to be difficult to repair, and thus are critical biological damages. Since individual abasic sites can be cytotoxic or mutagenic, abasic DNA clusters are likely to have significant cellular impact. Using a novel approach for distinguishing abasic clusters that are very closely spaced (putrescine cleavage) or less closely spaced (Nfo protein cleavage), we measured induction and processing of abasic clusters in 28SC human monocytes that were exposed to ionizing radiation. gamma-rays induced similar to1 double-strand break: 1.3 putrescine-detected abasic clusters: 0.8 Nfo-detected abasic clusters. After irradiation, the 28SC cells rejoined double-strand breaks efficiently within 24 h. In contrast, in these cells, the levels of abasic clusters decreased very slowly over 14 days to background levels. In vitro repair experiments that used 28SC cell extracts further support the idea of slow processing of specific, closely spaced abasic clusters. Although some clusters were removed by active cellular repair, a substantial number was apparently decreased by 'splitting' during DNA replication and subsequent cell division. The existence of abasic clusters in 28SC monocytes, several days after irradiation suggests that they constitute persistent damages that could lead to mutation or cell killing. C1 Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. E Carolina Univ, Dept Biol, Greenville, NC 27858 USA. NIA, Lab Mol Gerontol, Baltimore, MD 21224 USA. RP Sutherland, BM (reprint author), Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. EM bms@bnl.gov FU NCI NIH HHS [R01 CA 86897, R01 CA086897] NR 48 TC 91 Z9 93 U1 1 U2 3 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PY 2004 VL 32 IS 18 BP 5609 EP 5620 DI 10.1093/nar/gkh871 PG 12 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 865LI UT WOS:000224704200033 PM 15494449 ER PT J AU Chen, Y Xu, D AF Chen, Y Xu, D TI Global protein function annotation through mining genome-scale data in yeast Saccharomyces cerevisiae SO NUCLEIC ACIDS RESEARCH LA English DT Article ID SUBCELLULAR-LOCALIZATION; FUNCTION PREDICTION; NETWORKS; ALGORITHM; MACHINES; PROGRAMS AB As we are moving into the post genome-sequencing era, various high-throughput experimental techniques have been developed to characterize biological systems on the genomic scale. Discovering new biological knowledge from the high-throughput biological data is a major challenge to bioinformatics today. To address this challenge, we developed a Bayesian statistical method together with Boltzmann machine and simulated annealing for protein functional annotation in the yeast Saccharomyces cerevisiae through integrating various high-throughput biological data, including yeast two-hybrid data, protein complexes and microarray gene expression profiles. In our approach, we quantified the relationship between functional similarity and high-throughput data, and coded the relationship into 'functional linkage graph', where each node represents one protein and the weight of each edge is characterized by the Bayesian probability of function similarity between two proteins. We also integrated the evolution information and protein subcellular localization information into the prediction. Based on our method, 1802 out of 2280 unannotated proteins in yeast were assigned functions systematically. C1 UT ORNL, Grad Sch Genome Sci & Technol, Oak Ridge, TN 37830 USA. Univ Missouri, Dept Comp Sci, Digital Biol Lab, Columbia, MO 65211 USA. RP Xu, D (reprint author), UT ORNL, Grad Sch Genome Sci & Technol, Oak Ridge, TN 37830 USA. EM xudong@missouri.edu FU PHS HHS [EIA-O325386] NR 37 TC 77 Z9 87 U1 0 U2 4 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PY 2004 VL 32 IS 21 BP 6414 EP 6424 DI 10.1093/nar/gkh978 PG 11 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 878VZ UT WOS:000225676700037 PM 15585665 ER PT J AU Babnigg, G Giometti, CS AF Babnigg, G Giometti, CS TI GELBANK: a database of annotated two-dimensional gel electrophoresis patterns of biological systems with completed genomes SO NUCLEIC ACIDS RESEARCH LA English DT Article ID PROTEINS AB GELBANK is a publicly available database of two-dimensional gel electrophoresis (2DE) gel patterns of proteomes from organisms with known genome information (available at http://gelbank.anl.gov and ftp://bioinformatics.ani.gov/gelbank/). Currently it includes 131 completed, mostly microbial proteomes available from the National Center for Biotechnology Information. A web interface allows the upload of 2D gel patterns and their annotation for registered users. The images are organized by species, tissue type, separation method, sample type and staining method. The database can be queried based on protein or 2DE-pattern attributes. A web interface allows registered users to assign molecular weight and pH gradient profiles to their own 2D gel patterns as well as to link protein identifications to a given spot on the pattern. The website presents all of the submitted 2D gel patterns where the end-user can dynamically display the images or parts of images along with molecular weight, pH profile information and linked protein identification. A collection of images can be selected for the creation of animations from which the user can select sub-regions of interest and unlimited 2D gel patterns for visualization. The website currently presents 233 identifications for 81 gel patterns for Homo sapiens, Methanococcus jannaschii, Pyrococcus furiosus, Shewanella oneidensis, Escherichia coli and Deinococcus radiodurans. C1 Argonne Natl Lab, Prot Mapping Grp, Biosci Div, Argonne, IL 60439 USA. RP Giometti, CS (reprint author), Argonne Natl Lab, Prot Mapping Grp, Biosci Div, 9700 S Cass Ave, Argonne, IL 60439 USA. EM csgiometti@anl.gov NR 8 TC 19 Z9 21 U1 1 U2 2 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PD JAN 1 PY 2004 VL 32 SI SI BP D582 EP D585 DI 10.1093/nar/gkh089 PG 4 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 763HM UT WOS:000188079000138 PM 14681486 ER PT J AU Chandonia, JM Hon, G Walker, NS Lo Conte, L Koehl, P Levitt, M Brenner, SE AF Chandonia, JM Hon, G Walker, NS Lo Conte, L Koehl, P Levitt, M Brenner, SE TI The ASTRAL Compendium in 2004 SO NUCLEIC ACIDS RESEARCH LA English DT Article ID HIDDEN MARKOV-MODELS; DATABASE; SCOP AB The ASTRAL Compendium provides several databases and tools to aid in the analysis of protein structures, particularly through the use of their sequences. Partially derived from the SCOP database of protein structure domains, it includes sequences for each domain and other resources useful for studying these sequences and domain structures. The current release of ASTRAL contains 54 745 domains, more than three times as many as the initial release 4 years ago. ASTRAL has undergone major transformations in the past 2 years. In addition to several complete updates each year, ASTRAL is now updated on a weekly basis with preliminary classifications of domains from newly released PDB structures. These classifications are available as a stand-alone database, as well as integrated into other ASTRAL databases such as representative subsets. To enhance the utility of ASTRAL to structural biologists, all SCOP domains are now made available as PDB-style coordinate files as well as sequences. In addition to sequences and representative subsets based on SCOP domains, sequences and subsets based on PDB chains are newly included in ASTRAL. Several search tools have been added to ASTRAL to facilitate retrieval of data by individual users and automated methods. ASTRAL may be accessed at http://astral.stanford. edu/. C1 Univ Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley Struct Genom Ctr, Berkeley, CA 94720 USA. Univ Oregon, Inst Mol Biol, Eugene, OR 97403 USA. MRC, Mol Biol Lab, Cambridge CB2 2QH, England. Stanford Univ, Dept Biol Struct, Stanford, CA 94305 USA. RP Brenner, SE (reprint author), Univ Calif Berkeley, Dept Plant & Microbial Biol, 461A Koshland Hall, Berkeley, CA 94720 USA. EM brenner@compbio.berkeley.edu RI Levitt, Michael/E-4582-2012; Koehl, Patrice/K-5708-2013; Brenner, Steven/A-8729-2008 OI Levitt, Michael/0000-0002-8414-7397; Koehl, Patrice/0000-0002-0908-068X; Brenner, Steven/0000-0001-7559-6185 FU NHGRI NIH HHS [K22 HG000056, 1-K22-HG00056]; NIGMS NIH HHS [1-P50-GM62412, P50 GM062412] NR 10 TC 306 Z9 316 U1 0 U2 7 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PD JAN 1 PY 2004 VL 32 SI SI BP D189 EP D192 DI 10.1093/nar/gkh034 PG 4 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 763HM UT WOS:000188079000043 PM 14681391 ER PT J AU Salwinski, L Miller, CS Smith, AJ Pettit, FK Bowie, JU Eisenberg, D AF Salwinski, L Miller, CS Smith, AJ Pettit, FK Bowie, JU Eisenberg, D TI The Database of Interacting Proteins: 2004 update SO NUCLEIC ACIDS RESEARCH LA English DT Article ID SACCHAROMYCES-CEREVISIAE; PROTEOME; COMPLEXES; DIP AB The Database of Interacting Proteins (http://dip.doe-mbi.ucla.edu) aims to integrate the diverse body of experimental evidence on protein-protein interactions into a single, easily accessible online database. Because the reliability of experimental evidence varies widely, methods of quality assessment have been developed and utilized to identify the most reliable subset of the interactions. This CORE set can be used as a reference when evaluating the reliability of high-throughput protein-protein interaction data sets, for development of prediction methods, as well as in the studies of the properties of protein interaction networks. C1 Univ Calif Los Angeles, Howard Hughes Med Inst, Los Angeles, CA 90095 USA. Univ Calif Los Angeles, UCLA DOE Inst Genom & Proteom, Los Angeles, CA 90095 USA. Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA. Univ Calif Los Angeles, Inst Mol Biol, Dept Biol Chem, Los Angeles, CA 90095 USA. RP Eisenberg, D (reprint author), Univ Calif Los Angeles, Howard Hughes Med Inst, Box 951570, Los Angeles, CA 90095 USA. EM david@mbi.ucla.edu OI Miller, Christopher/0000-0002-9448-8144 NR 17 TC 977 Z9 1012 U1 4 U2 30 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PD JAN 1 PY 2004 VL 32 SI SI BP D449 EP D451 DI 10.1093/nar/gkh086 PG 3 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 763HM UT WOS:000188079000106 PM 14681454 ER PT J AU Tamura, M Hendrix, DK Klosterman, PS Schimmelman, NRB Brenner, SE Holbrook, SR AF Tamura, M Hendrix, DK Klosterman, PS Schimmelman, NRB Brenner, SE Holbrook, SR TI SCOR: Structural Classification of RNA, version 2.0 SO NUCLEIC ACIDS RESEARCH LA English DT Article ID 3-DIMENSIONAL STRUCTURES; DATABASE; FEATURES; LOOPS; MOTIF AB SCOR, the Structural Classification of RNA (http:// scor.lbl.gov), is a database designed to provide a comprehensive perspective and understanding of RNA motif three-dimensional structure, function, tertiary interactions and their relationships. SCOR 2.0 represents a major expansion and introduces a new classification organization. The new version represents the classification as a Directed Acyclic Graph (DAG), which allows a classification node to have multiple parents, in contrast to the strictly hierarchical classification used in SCOR 1.2. SCOR 2.0 supports three types of query terms in the updated search engine: PDB or NDB identifier, nucleotide sequence and keyword. We also provide parseable XML files for all information. This new release contains 511 RNA entries from the PDB as of 15 May 2003. A total of 5880 secondary structural elements are classified: 2104 hairpin loops and 3776 internal loops. RNA motifs reported in the literature, such as 'Kink turn' and 'GNRA loops', are now incorporated into the structural classification along with definitions and descriptions. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Biol Struct, Phys Biosci Div, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720 USA. RP Holbrook, SR (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Biol Struct, Phys Biosci Div, 1 Cyclotron Rd,MS 64-123, Berkeley, CA 94720 USA. EM srholbrook@lbl.gov RI Brenner, Steven/A-8729-2008 OI Brenner, Steven/0000-0001-7559-6185 FU NHGRI NIH HHS [K22 HG000056, K22 HG00056]; NIGMS NIH HHS [R01 GM066199, GM 66199] NR 17 TC 66 Z9 69 U1 0 U2 9 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0305-1048 J9 NUCLEIC ACIDS RES JI Nucleic Acids Res. PD JAN 1 PY 2004 VL 32 SI SI BP D182 EP D184 DI 10.1093/nar/gkh080 PG 3 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 763HM UT WOS:000188079000041 PM 14681389 ER PT J AU Mikhailov, KR Stavinskiy, AV Vlassov, AV Mestayer, MD AF Mikhailov, KR Stavinskiy, AV Vlassov, AV Mestayer, MD TI Methods for close-track efficiency study SO NUKLEONIKA LA English DT Article; Proceedings Paper CT 2nd Warsaw Meeting on Particle Correlations and Resonances in Heavy Ion Collisions CY OCT 15-18, 2003 CL Warsaw, POLAND DE particle correlations; close track efficiency ID PARTICLES AB We describe two new methods for the study of close track efficiency. One is based on the study of a correlation function for particles with different masses as a function of their relative momenta in the laboratory reference system. The other method is based on the analysis of artificial events, constructed by merging raw data from separate events. Both methods and the standard Monte Carlo method were applied to data from the CLAS detector at Jefferson Laboratory. All three methods provide the same result for close track efficiency with an accuracy sufficient for practical application. C1 Alikhanov Inst Theoret & Expt Phys, ITEP, Moscow 117218, Russia. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Mikhailov, KR (reprint author), Alikhanov Inst Theoret & Expt Phys, ITEP, 25 B Cheremushkin Skaya Str, Moscow 117218, Russia. EM kmikhail@itep.ru NR 11 TC 0 Z9 0 U1 0 U2 0 PU INST NUCLEAR CHEMISTRY TECHNOLOGY PI WARSAW PA DORODNA 16 STR, 03-195 WARSAW, POLAND SN 0029-5922 J9 NUKLEONIKA JI Nukleonika PY 2004 VL 49 SU 2 BP S85 EP S88 PG 4 WC Chemistry, Inorganic & Nuclear; Physics, Nuclear SC Chemistry; Physics GA 880YP UT WOS:000225826900020 ER PT J AU Rohl, CA Strauss, CEM Misura, KMS Baker, D AF Rohl, CA Strauss, CEM Misura, KMS Baker, D TI Protein structure prediction using rosetta SO NUMERICAL COMPUTER METHODS, PT D SE METHODS IN ENZYMOLOGY LA English DT Review ID SECONDARY STRUCTURE; SEQUENCES; CONFORMATIONS; MINIMIZATION; RECOGNITION; GENERATION; PROSPECTS; FEATURES; DESIGN C1 Univ Washington, Dept Biochem, Seattle, WA 98195 USA. Univ Washington, Howard Hughes Med Inst, Seattle, WA 98195 USA. Los Alamos Natl Lab, Div Biosci, Los Alamos, NM 87545 USA. RP Rohl, CA (reprint author), Univ Washington, Dept Biochem, Seattle, WA 98195 USA. RI Rohl, Carol/I-2589-2012 OI Rohl, Carol/0000-0002-9229-3917 NR 33 TC 721 Z9 745 U1 5 U2 103 PU ACADEMIC PRESS INC PI SAN DIEGO PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 USA SN 0076-6879 J9 METHOD ENZYMOL JI Methods Enzymol. PY 2004 VL 383 BP 66 EP + PG 32 WC Mathematics, Applied SC Mathematics GA BAC03 UT WOS:000221514500004 PM 15063647 ER PT S AU Nymeyer, H Gnanakaran, S Garcia, AE AF Nymeyer, H Gnanakaran, S Garcia, AE BE Brand, L Johnson, ML TI Atomic simulations of protein folding, using the replica exchange algorithm SO NUMERICAL COMPUTER METHODS, PT D SE Methods in Enzymology LA English DT Review ID FREE-ENERGY LANDSCAPE; MOLECULAR-DYNAMICS SIMULATIONS; MONTE-CARLO SIMULATIONS; BETA-HAIRPIN; EXPLICIT SOLVENT; MULTICANONICAL ALGORITHM; MET-ENKEPHALIN; PEPTIDES; MODEL; WATER C1 Los Alamos Natl Lab, Theoret Biol & Biophys Grp, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Theoret Biol & Biophys Grp, Los Alamos, NM 87545 USA. NR 51 TC 87 Z9 92 U1 0 U2 17 PU ELSEVIER ACADEMIC PRESS INC PI SAN DIEGO PA 525 B STREET, SUITE 1900, SAN DIEGO, CA 92101-4495 USA SN 0076-6879 BN 0-12-182788-7 J9 METHOD ENZYMOL JI Methods Enzymol. PY 2004 VL 383 BP 119 EP + PG 32 WC Mathematics, Applied SC Mathematics GA BAC03 UT WOS:000221514500006 PM 15063649 ER PT B AU Garimella, R Kucharik, M Shashkov, M AF Garimella, R Kucharik, M Shashkov, M BE Feistauer, M Dolejsi, V Najzar, K TI Efficient algorithm for local-bound-preserving remapping in ALE methods SO NUMERICAL MATHEMATICS AND ADVANCED APPLICATIONS, PROCEEDINGS LA English DT Proceedings Paper CT 5th European Conference on Numerical Mathematics and Advanced Applications CY AUG 18-22, 2003 CL Prague, CZECH REPUBLIC SP Charles Univ, Fac Math & Phys, Inst Chem Technol, Dept Math AB The remapping algorithm is an essential part of the ALE (Arbitrary Lagrangian-Eulerian) method. In this talk we present such an algorithm based on linear function reconstruction, approximate integration and mass redistribution. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Garimella, R (reprint author), Los Alamos Natl Lab, T-7,MS-284, Los Alamos, NM 87545 USA. NR 3 TC 1 Z9 1 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY BN 3-540-21460-7 PY 2004 BP 358 EP 367 PG 10 WC Mathematics, Applied SC Mathematics GA BBB49 UT WOS:000224551300033 ER PT S AU Thomson, J Cowell, A Paulson, P Butner, S Whiting, M AF Thomson, J Cowell, A Paulson, P Butner, S Whiting, M BE Meersman, R Tari, Z Corsaro, A Herrero, P Perez, MS Radenkovic, M Robles, V Santoro, C Albani, A Turowski, K Jarrar, M Gangemi, A Duval, E Spyns, P Palinginis, A TI Knowledge signatures for information integration SO ON THE MOVE TO MEANINGFUL INTERNET SYSTEMS 2004: OTM 2004 WORKSHOPS, PROCEEDINGS SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT On the Move Confederated International Workshop and Conference CY OCT 25-29, 2004 CL Agia Napa, CYPRUS SP RMIT Univ, Sch Comp Sci & Informat Technol, Vrije Univ Brussel, Dept Comp Sci AB Information analysis, scientific discovery, web navigation and many other information related activities rely on the collection, analysis, and integration of unstructured, disparate data. In spite of significant research efforts, automatic methods for information integration are still vastly inferior to human capabilities. Tasks which are simple for humans, such as recognizing the underlying similarities between superficially different objects or sorting out the semantics of ambiguous statements, continue to present significant technical challenges for automated processes. C1 Univ Guelph, Dept Comp & Informat Sci, Guelph, ON N1G 2W1, Canada. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Thomson, J (reprint author), Univ Guelph, Dept Comp & Informat Sci, Guelph, ON N1G 2W1, Canada. EM judi@cis.uoguelph.ca; andrew@pnl.gov; patrick.paulson@pnl.gov; scott.butner@pnl.gov; mark.whiting@pnl.gov NR 3 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-23664-3 J9 LECT NOTES COMPUT SC PY 2004 VL 3292 BP 26 EP 27 PG 2 WC Computer Science, Artificial Intelligence; Computer Science, Information Systems; Computer Science, Theory & Methods SC Computer Science GA BBD43 UT WOS:000225021000012 ER PT S AU Bebek, CJ Groom, DE Holland, SE Karcher, A Kolbe, WF Palaio, NP Roe, NA Turko, BT Wang, G AF Bebek, CJ Groom, DE Holland, SE Karcher, A Kolbe, WF Palaio, NP Roe, NA Turko, BT Wang, G BE Garnett, JD Beletic, JW TI Development of fully depleted, back-illuminated charge coupled devices SO OPTICAL AND INFRARED DETECTORS FOR ASTRONOMY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Optical and Infrared Detectors for Astronomy CY JUN 21-22, 2004 CL Glasgow, SCOTLAND SP SPIE DE CCD; fully depleted; back illuminated; 150 mm diameter wafers; refractory metal; MBE ID HIGH-RESISTIVITY SILICON; P-CHANNEL CCDS; QUANTUM EFFICIENCY; DAMAGE; TEMPERATURE; TECHNOLOGY AB The status of CCD development efforts at Lawrence Berkeley National Laboratory is reviewed. Fabrication technologies for the production of back-illuminated, fully depleted CCD's on 150 mm diameter wafers are described. In addition, preliminary performance results for high-voltage compatible CCD's, including a 3512 x 3512, 10.5 mum pixel CCD for the proposed SuperNova Acceleration Probe project, are presented. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Holland, SE (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. RI Roe, Natalie/A-8798-2012; Holland, Stephen/H-7890-2013 NR 34 TC 12 Z9 12 U1 0 U2 4 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5431-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5499 BP 140 EP 150 DI 10.1117/12.552295 PG 11 WC Engineering, Aerospace; Astronomy & Astrophysics; Instruments & Instrumentation; Optics SC Engineering; Astronomy & Astrophysics; Instruments & Instrumentation; Optics GA BBB41 UT WOS:000224539300014 ER PT S AU Mourant, JR Aida, T Coburn, L Ramachandran, J AF Mourant, JR Aida, T Coburn, L Ramachandran, J BE Alfano, RR Katz, A TI Effect of non-sphericity of scattering centers on light transport in turbid media SO OPTICAL BIOPSY V SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Optical Biopsy V CY JAN 27-28, 2004 CL San Jose, CA SP SPIE DE Monte Carlo; bimedical optics; light scattering ID MAMMALIAN-CELLS; MATRIX AB The scattering centers in cells are not spheres, however, in most modeling of light transport, the scattering centers are assumed to be spherical. For example, in Monte Carlo simulations a Mie or Henyey-Greenstein phase function is often used. It is known that an elliptical particle will have a different phase function than a spherical particle. In particular there are differences in the phase functions for scattering polarized light. To examine how these changes in phase function affect light transport in tissue, we have developed a Monte Carlo code for light transport that uses elliptical scatterers. The phase functions are calculated using a T-matrix code and the propagation of polarized photons is performed in a manner analagous to that used by Bartel and Hielscher. Our initial results indicate that for narrow particle distributions the difference in shape can cause large differences in the intensity and polarization properties of the diffusely reflected light. For a mixture of particle sizes, however, there is a much smaller difference in the properties of the diffusely scattered light. Results are presented for both narrow and broad distributions of scatter sizes relevant to tissue. C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. RP Mourant, JR (reprint author), Los Alamos Natl Lab, Biosci Div, MS E535, Los Alamos, NM 87545 USA. NR 8 TC 2 Z9 2 U1 0 U2 0 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5234-3 J9 P SOC PHOTO-OPT INS PY 2004 VL 5326 BP 54 EP 59 DI 10.1117/12.529619 PG 6 WC Engineering, Biomedical; Optics; Spectroscopy SC Engineering; Optics; Spectroscopy GA BAS05 UT WOS:000223341600008 ER PT S AU Guo, J Vawter, GA Shaw, MJ Hadley, GR Esherick, P Jain, A Alford, CR Sullivan, CT AF Guo, J Vawter, GA Shaw, MJ Hadley, GR Esherick, P Jain, A Alford, CR Sullivan, CT BE Digonnet, MJF Jiang, S TI Characterization of Si3N4/SiO2 planar lightwave circuits and ring resonators SO OPTICAL COMPONENTS AND MATERIALS SE Proceedings of SPIE LA English DT Proceedings Paper CT Conference on Optical Components and Materials CY JAN 26-27, 2004 CL San Jose, CA DE waveguide loss; lateral mode interferometer (LMI); waveguide polarizer; ring resonator ID WAVE-GUIDES; SILICON; FABRICATION; TECHNOLOGY; ROUGHNESS; LASER AB The large refractive index contrast between silicon nitride and silicon dioxide allows silicon nitride/dioxide planar waveguides to have a small mode size and low radiation bending loss compared with doped silicon dioxide waveguides. Small waveguide bend with low radiation loss can help make small integrated planar lightwave circuits (PLCs), and also high-Q waveguide ring resonators. This presentation will talk about the design, fabrication and characterization of low loss silicon nitride/dioxide planar waveguide devices including waveguide bend, waveguide cross, and leaky mode waveguide polarizer. The key contribution of this work is the use of the lateral mode interference (LMI) 3dB splitter to accurately measure the loss of the planar lightwave circuit devices. We will also talk about the waveguide ring resonators with silicon nitride/dioxide materials. The application for photonic biochemical sensors will also be discussed. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Sandia Natl Labs, POB 5800,MS 0603, Albuquerque, NM 87185 USA. EM jguo@sandia.gov NR 21 TC 4 Z9 4 U1 1 U2 4 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5258-0 J9 PROC SPIE PY 2004 VL 5350 BP 13 EP 22 DI 10.1117/12.529641 PG 10 WC Materials Science, Ceramics; Optics SC Materials Science; Optics GA BAJ63 UT WOS:000222591800002 ER PT S AU Kjornrattanawanich, B Soufli, R Bajt, S Windt, DL Seely, JF AF Kjornrattanawanich, B Soufli, R Bajt, S Windt, DL Seely, JF BE Soufli, R Seely, JF TI An assessment of yttrium optical constants in the EUV using Mo/Y multilayers designed as linear polarizers SO OPTICAL CONSTANTS OF MATERIALS FOR UV TO X-RAY WAVELENGTHS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Optical Constants of Materials for UV to X-Ray Wavelengths CY AUG 04-05, 2004 CL Denver, CO SP SPIE ID MOLYBDENUM AB We have produced and characterized Mo/Y multilayers designed as linear-polarizers for use near lambda - 8 nm. By depositing these films directly onto silicon photodiodes, we are able to measure both reflectance and transmittance in the EUV using synchrotron radiation. These measurements have been used to access the accuracy of yttrium optical constants in this wavelength range. We describe our experimental results and discuss the prospects for the future development of efficient EUV polarization elements. C1 Brookhaven Natl Lab, Natl Synchrotron Light Source Dept, Univ Space Res Assoc, Upton, NY 11973 USA. RP Kjornrattanawanich, B (reprint author), Brookhaven Natl Lab, Natl Synchrotron Light Source Dept, Univ Space Res Assoc, Beamline X24C, Upton, NY 11973 USA. NR 11 TC 5 Z9 5 U1 0 U2 2 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5476-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5538 BP 17 EP 22 DI 10.1117/12.560465 PG 6 WC Instruments & Instrumentation; Materials Science, Characterization & Testing; Optics SC Instruments & Instrumentation; Materials Science; Optics GA BBD65 UT WOS:000225039500002 ER PT S AU Aquila, AL Salmassi, F Gullikson, EM Eriksson, F Birch, J AF Aquila, AL Salmassi, F Gullikson, EM Eriksson, F Birch, J BE Soufli, R Seely, JF TI Measurements of the optical constants of scandium in the 50-1300eV range SO OPTICAL CONSTANTS OF MATERIALS FOR UV TO X-RAY WAVELENGTHS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Optical Constants of Materials for UV to X-Ray Wavelengths CY AUG 04-05, 2004 CL Denver, CO SP SPIE DE index of refraction; EUV; soft x-ray; Sc AB Scandium containing multilayers have been produced with very high reflectivity in the soft x-ray spectrum. Accurate optical constants are required in order to model the multilayer reflectivity. Since there are relatively few measurements of the optical constants of Scandium in the soft x-ray region we have performed measurements over the energy range of 50-1,300 eV. Thin films of Scandium were deposited by ion-assisted magnetron sputtering at Linkoping University and DC Magnetron sputtering at CXRO. Transmission measurements were performed at the Advanced Light Source beamline 6.3.2. The absorption coefficient was deduced from the measurements and the dispersive part of the index of refraction was obtained using the Kramers-Kronig relation. The measured optical constants are used to model the near-normal incidence reflectivity of Cr/Sc multilayers near the Sc L-2,L-3 edge. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Xray Opt, Berkeley, CA 94720 USA. RP Aquila, AL (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Xray Opt, Berkeley, CA 94720 USA. NR 7 TC 19 Z9 19 U1 1 U2 5 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5476-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5538 BP 64 EP 71 DI 10.1117/12.563615 PG 8 WC Instruments & Instrumentation; Materials Science, Characterization & Testing; Optics SC Instruments & Instrumentation; Materials Science; Optics GA BBD65 UT WOS:000225039500007 ER PT S AU Rosfjord, K Chang, C Attwood, D AF Rosfjord, K Chang, C Attwood, D BE Soufli, R Seely, JF TI Direct index of refraction measurement of silicon and ruthenium at EUV wavelengths SO OPTICAL CONSTANTS OF MATERIALS FOR UV TO X-RAY WAVELENGTHS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Optical Constants of Materials for UV to X-Ray Wavelengths CY AUG 04-05, 2004 CL Denver, CO SP SPIE DE silicon; ruthenium; index of refraction; interferometry; EUV AB The use of coherent radiation from undulator beamlines has been used to directly measure the real and imaginary parts of the index of refraction of several metals'. Here we extend the same interferometric technique to slightly higher energies, and measure the indices of refraction of silicon and ruthenium, essential materials for extreme ultraviolet (EUV) lithography. Both materials are tested at-wavelength (13.4 nm.) Silicon is also measured about its L-2 (99.8 eV) and L-3 (99.2 eV) absorption edges. This measurement technique is currently being expanded further to soft X-ray wavelengths. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Xray Opt, Berkeley, CA 94720 USA. RP Rosfjord, K (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Xray Opt, Berkeley, CA 94720 USA. NR 6 TC 2 Z9 2 U1 0 U2 0 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5476-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5538 BP 92 EP 95 DI 10.1117/12.559815 PG 4 WC Instruments & Instrumentation; Materials Science, Characterization & Testing; Optics SC Instruments & Instrumentation; Materials Science; Optics GA BBD65 UT WOS:000225039500010 ER PT S AU Johnson, TA Soufli, R Gullikson, EM Clift, M AF Johnson, TA Soufli, R Gullikson, EM Clift, M BE Soufli, R Seely, JF TI Zirconium and niobium transmission data at wavelengths from 11-16 nm and 200-1200 nm SO OPTICAL CONSTANTS OF MATERIALS FOR UV TO X-RAY WAVELENGTHS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Optical Constants of Materials for UV to X-Ray Wavelengths CY AUG 04-05, 2004 CL Denver, CO SP SPIE DE optical filters; optical constants; zirconium; niobium; extreme ultraviolet lithography; EUVL ID ENGINEERING TEST STAND AB Transmission measurements of niobium and zirconium at both extreme-ultraviolet (EUV) and ultraviolet, visible, and near infrared (UV/Vis/NIR) wavelengths are presented. Thin foils of various thicknesses mounted on nickel mesh substrates were measured, and these data were used to calculate the optical constants delta and beta of the complex refractive index n = 1 - delta + ibeta. beta values were calculated directly from the measured transmittance of the foils after normalizing for the nickel mesh. The average beta values for each set of foils are presented as a function of wavelength. The real (dispersive) part of the refractive index, delta was then calculated from Kramers-Kronig analysis by combining these beta values with those from previous experimental data and the atomic tables. C1 Sandia Natl Labs, Livermore, CA 94550 USA. RP Johnson, TA (reprint author), Sandia Natl Labs, 7011 E Ave, Livermore, CA 94550 USA. NR 8 TC 3 Z9 3 U1 0 U2 2 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5476-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5538 BP 119 EP 124 DI 10.1117/12.564259 PG 6 WC Instruments & Instrumentation; Materials Science, Characterization & Testing; Optics SC Instruments & Instrumentation; Materials Science; Optics GA BBD65 UT WOS:000225039500013 ER PT J AU Wick, DV Martinez, T AF Wick, DV Martinez, T TI Adaptive optical zoom SO OPTICAL ENGINEERING LA English DT Editorial Material DE active optics; adaptive optics; spatial light modulators; zoom lenses ID ACTIVE LENS; MODULATOR AB In order to optically vary the magnification of an imaging system, continuous mechanical zoom lenses require multiple optical elements and use fine mechanical motion to precisely adjust the separations between individual or groups of lenses. By incorporating active elements, such as liquid crystal spatial light modulators or deformable mirrors, into the optical design, we can eliminate the need to change the spacing between lenses and create an imaging system with variable optical magnification that has no macroscopic moving parts. (C) 2004 Society of Photo-Optical Instrumentation Engineers. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. USAF, Res Lab, Directed Energy Directorate, Kirtland AFB, NM 87117 USA. RP Wick, DV (reprint author), Sandia Natl Labs, POB 5800,MS 1188, Albuquerque, NM 87185 USA. NR 10 TC 38 Z9 40 U1 0 U2 6 PU SPIE-INT SOCIETY OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA SN 0091-3286 J9 OPT ENG JI Opt. Eng. PD JAN PY 2004 VL 43 IS 1 BP 8 EP 9 DI 10.1117/1.1633570 PG 2 WC Optics SC Optics GA 776FV UT WOS:000189106700002 ER PT S AU Miller, GH AF Miller, GH BE Lane, MA Wuest, CR TI The national ignition facility SO OPTICAL ENGINEERING AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY II: THE NATIONAL IGNITION FACILITY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Annual Conference on Optical Engineering at the Lawrence Livermore National Laboratory CY JAN 28, 2004 CL San Jose, CA SP SPIE DE high energy density physics; inertial confinement fusion; laboratory astrophysics; solid state lasers AB The National Ignition Facility (NIF) at Lawrence Livermore National Laboratory is a stadium-sized facility containing a 192-beam, 1.8-Megajoule, 500-Terawatt, ultraviolet laser system together with a 10-meter-diameter target chamber and room for 100 diagnostics. NIF is the world's largest and most energetic laser experimental system, providing a scientific center to study inertial confinement fusion and matter at extreme energy densities and pressures. NIF's energetic laser beams will compress fusion targets to conditions required for thermonuclear bum, liberating more energy than required to initiate the fusion reactions. Other NIF experiments will study physical processes at temperatures approaching 10(8) K and 10(11) bar; conditions that exist naturally only in the interior of stars and planets. NIF has completed the first phases of its laser commissioning program. The first four beams of NIF have generated 106 kilojoules in 23-ns pulses of infrared light and over 16 kJ in 3.5-ns pulses at the third harmonic (351 nm). NIF's target experimental systems are being commissioned and experiments have begun. This paper discusses NIF's current and future experimental capability, plans for diagnostics, cryogenic target systems, specialized optics for experiments, and potential enhancements to NIF such as multi-color laser operation and high-energy short-pulse operation. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Miller, GH (reprint author), Lawrence Livermore Natl Lab, POB 808,L-466, Livermore, CA 94550 USA. NR 44 TC 8 Z9 8 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 0-8194-5249-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5341 BP 1 EP 12 DI 10.1117/12.538462 PG 12 WC Optics SC Optics GA BAJ02 UT WOS:000222485900001 ER PT S AU Moses, EI AF Moses, EI BE Lane, MA Wuest, CR TI National Ignition Facility: 1.8 MJ, 750 TW ultraviolet laser SO OPTICAL ENGINEERING AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY II: THE NATIONAL IGNITION FACILITY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Annual Conference on Optical Engineering at the Lawrence Livermore National Laboratory CY JAN 28, 2004 CL San Jose, CA SP SPIE DE solid state laser; neodymium glass; inertial confinement fusion ID FUSED-SILICA; DAMAGE; OPTICS AB The National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory is a stadium-sized facility containing a 192-beam, 1.8-Megajoule, 750-Terawatt, ultraviolet laser system together with a 10-meter-diameter target chamber with room for nearly 100 experimental diagnostics. NIF will be the world's largest and most energetic laser experimental system, providing a scientific center to study inertial confinement fusion and matter at extreme energy densities and pressures. NIF's energetic laser beams will compress fusion targets to conditions required for thermonuclear bum, liberating more energy than required to initiate the fusion reactions. Other NIF experiments will study physical processes at temperatures and pressures approaching 108 K and 10 11 bar, conditions that exist naturally only in the interior of stars, planets and in nuclear weapons. NIF has completed the first phase of its laser commissioning program. The first four beams of NIF have generated 106 kilojoules of infrared light and over 16 kJ at the third harmonic (351 nm). NIF's target experimental systems are being commissioned and experiments have begun. This paper provides a detailed look the NIF laser systems, laser and optical performance, results from recent laser commissioning shots, and plans for commissioning diagnostics for experiments on NIF. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Moses, EI (reprint author), Lawrence Livermore Natl Lab, POB 808,L-466, Livermore, CA 94551 USA. NR 23 TC 17 Z9 17 U1 0 U2 3 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5249-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5341 BP 13 EP 24 DI 10.1117/12.538463 PG 12 WC Optics SC Optics GA BAJ02 UT WOS:000222485900002 ER PT S AU Spaeth, ML Manes, KR Widmayer, CC Williams, WH Whitman, PK Henesian, MA Stowers, IF Honig, J AF Spaeth, ML Manes, KR Widmayer, CC Williams, WH Whitman, PK Henesian, MA Stowers, IF Honig, J BE Lane, MA Wuest, CR TI The National Ignition Facility wavefront requirements and optical architecture SO OPTICAL ENGINEERING AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY II: THE NATIONAL IGNITION FACILITY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Annual Conference on Optical Engineering at the Lawrence Livermore National Laboratory CY JAN 28, 2004 CL San Jose, CA SP SPIE DE solid-state lasers; fusion lasers ID LASER SYSTEMS AB With the first four of its eventual 192 beams now executing shots, the National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory is already the world's largest and most energetic laser. The optical system performance requirements that are in place for NIF are derived from the goals of the missions it is designed to serve. These missions include inertial confinement fusion (ICF) research and the study of matter at extreme energy densities and pressures. These mission requirements have led to a design strategy for achieving high quality focusable energy and power from the laser and to specifications on optics that are important for an ICF laser. The design of NIF utilizes a multipass architecture with a single large amplifier type that provides high gain, high extraction efficiency and high packing density. We have taken a systems engineering approach to the practical implementation of this design that specifies the wavefront parameters of individual optics in order to achieve the desired cumulative performance of the laser beamline. This presentation provides a detailed look at the causes and effects of performance degradation in large laser systems and how NIF has been designed to overcome these effects. We will also present results of spot size performance measurements that have validated many of the early design decisions that have been incorporated in the NIF laser architecture. C1 Lawrence Livermore Natl Lab, Livermore, CA USA. RP Spaeth, ML (reprint author), Lawrence Livermore Natl Lab, Livermore, CA USA. RI Whitman, Pamela/B-2336-2013 NR 17 TC 12 Z9 12 U1 0 U2 3 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5249-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5341 BP 25 EP 42 DI 10.1117/12.538478 PG 18 WC Optics SC Optics GA BAJ02 UT WOS:000222485900003 ER PT S AU Sawicki, RH AF Sawicki, RH BE Lane, MA Wuest, CR TI The National Ignition Facility: Laser system, beam line design and construction SO OPTICAL ENGINEERING AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY II: THE NATIONAL IGNITION FACILITY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Annual Conference on Optical Engineering at the Lawrence Livermore National Laboratory CY JAN 28, 2004 CL San Jose, CA SP SPIE AB The construction of the National Ignition Facility (NIF) building and laser beampaths at the Lawrence Livermore National Laboratory has been completed. This 8-year design/construction effort has successfully erected a 450,000 sq ft building and filled its interior with a complex of large-scale optical benches. These benches support all of the large-aperture optic elements of the NIF and the environmentally controlled enclosures that protect each of the 192 laser beamlines as they propagate from the injection laser system, through large aperture amplification stages, and into the target chamber. Even though this facility is very large, nearly 200 in long, 100 m wide, and 30 m tall, stringent mechanical performance requirements have been achieved throughout including temperature control <0.3 degreesC, laser-beam pointing stability on target <50 murms, and level 100 surface cleanliness on internal components. This presentation will provide an historical perspective explaining the basis of the design, technical details describing the techniques of construction and a chronological progression of the construction activities from ground breaking to beampath completion. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Sawicki, RH (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave,L-466, Livermore, CA 94550 USA. NR 0 TC 7 Z9 7 U1 0 U2 5 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5249-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5341 BP 43 EP 54 DI 10.1117/12.538480 PG 12 WC Optics SC Optics GA BAJ02 UT WOS:000222485900004 ER PT S AU Van Wonterghem, BM Burkhart, SC Haynam, CA Manes, KR Marshall, CD Murray, JE Spaeth, ML Speck, DR Sutton, SB Wegner, PJ AF Van Wonterghem, BM Burkhart, SC Haynam, CA Manes, KR Marshall, CD Murray, JE Spaeth, ML Speck, DR Sutton, SB Wegner, PJ BE Lane, MA Wuest, CR TI National Ignition Facility commissioning and performance SO OPTICAL ENGINEERING AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY II: THE NATIONAL IGNITION FACILITY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Annual Conference on Optical Engineering at the Lawrence Livermore National Laboratory CY JAN 28, 2004 CL San Jose, CA SP SPIE DE solid state lasers; neodymium; fusion lasers ID LASER AB The National Ignition Facility at LLNL recently commissioned the first set of four beam lines into the target chamber. This effort, called NIF Early Light, demonstrated the entire laser system architecture from master oscillator through the laser amplifiers and final optics to target and initial X-ray diagnostics. This paper describes the major installation and commissioning steps for one of NIF's 48 beam quads. Using a dedicated single beam line Precision Diagnostic System, performance was explored over the entire power versus energy space up to 6.4 TW/beam for sub-nanosecond pulses and 25 kJ/beam for 23 ns pulses at 1omega. NEL also demonstrated frequency converted Nd:Glass laser energies from a single beamline of 11.3 kJ at 2omega and 10.4 kJ at 3omega. C1 Lawrence Livermore Natl Lab, NIF Project, Livermore, CA 94550 USA. RP Van Wonterghem, BM (reprint author), Lawrence Livermore Natl Lab, NIF Project, POB 5508, Livermore, CA 94550 USA. NR 6 TC 16 Z9 16 U1 1 U2 10 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5249-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5341 BP 55 EP 65 DI 10.1117/12.538464 PG 11 WC Optics SC Optics GA BAJ02 UT WOS:000222485900005 ER PT S AU Williams, WH Auerbach, JM Henesian, MA Jancaitis, KS Manes, KR Mehta, NC Orth, CD Sacks, RA Shaw, MJ Widmayer, CC AF Williams, WH Auerbach, JM Henesian, MA Jancaitis, KS Manes, KR Mehta, NC Orth, CD Sacks, RA Shaw, MJ Widmayer, CC BE Lane, MA Wuest, CR TI Optical propagation modeling for the National Ignition Facility SO OPTICAL ENGINEERING AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY II: THE NATIONAL IGNITION FACILITY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Annual Conference on Optical Engineering at the Lawrence Livermore National Laboratory CY JAN 28, 2004 CL San Jose, CA SP SPIE ID LASER AB Optical propagation modeling of the National Ignition Facility has been utilized extensively from conceptual design several years ago through to early operations today. In practice we routinely (for every shot) model beam propagation starting from the waveform generator through to the target. This includes the regenerative amplifier, the 4-pass rod amplifier, and the large slab amplifiers. Such models have been improved over time to include details such as distances between components, gain profiles in the laser slabs and rods, transient optical distortions due to the flashlamp heating of laser slabs, measured transmitted and reflected wavefronts for all large optics, the adaptive optic feedback loop, and the frequency converter. These calculations allow nearfield and farfield predictions in good agreement with measurements. C1 Lawrence Livermore Natl Lab, Livermore, CA 95336 USA. RP Williams, WH (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 95336 USA. NR 7 TC 6 Z9 6 U1 0 U2 10 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5249-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5341 BP 66 EP 72 DI 10.1117/12.538476 PG 7 WC Optics SC Optics GA BAJ02 UT WOS:000222485900006 ER PT S AU Shaw, M Williams, W House, R Haynam, C AF Shaw, M Williams, W House, R Haynam, C BE Lane, MA Wuest, CR TI Laser Performance Operations Model (LPOM) SO OPTICAL ENGINEERING AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY II: THE NATIONAL IGNITION FACILITY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Annual Conference on Optical Engineering at the Lawrence Livermore National Laboratory CY JAN 28, 2004 CL San Jose, CA SP SPIE DE solid-state lasers; fusion; controls; feedback; modeling ID NATIONAL-IGNITION-FACILITY AB The Laser Performance Operations Model (LPOM) has been developed to provide real time predictive capabilities for the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory. LPOM uses diagnostic feedback from previous NIF shots to maintain accurate energetics models for each of the 192 NIF beamlines (utilizing one CPU per laser beamline). This model is used to determine the system setpoints (initial power, waveplate attenuations, laser diagnostic settings) required for all requested NIF shots. In addition, LPOM employs optical damage models to minimize the probability that a proposed shot may damage the system. LPOM provides post-shot diagnostic reporting to support the NIT community. LPOM was deployed prior to the first main laser shots in NIF, and has since been used to set up every shot in NIF's first quad (four beamlines). Real-time adjustments of the codes energetics parameters allows the LPOM to predict total energies within 5%. and provide energy balance within the four beamlines to within 2% for shots varying from 0.5 to 26 kJ (1.053 mum) per beamline. The LPOM has been a crucial tool in the commissioning of the first quad of NIF. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Shaw, M (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 7 TC 4 Z9 4 U1 0 U2 2 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5249-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5341 BP 73 EP 83 DI 10.1117/12.538474 PG 11 WC Optics SC Optics GA BAJ02 UT WOS:000222485900007 ER PT S AU Campbell, JH Hawley-Fedder, RA Stolz, CJ Menapace, JA Borden, MR Whitman, PK Yu, J Runkel, M Riley, MO Feit, MD Hackel, RP AF Campbell, JH Hawley-Fedder, RA Stolz, CJ Menapace, JA Borden, MR Whitman, PK Yu, J Runkel, M Riley, MO Feit, MD Hackel, RP BE Lane, MA Wuest, CR TI NIF optical materials and fabrication technologies: An overview SO OPTICAL ENGINEERING AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY II: THE NATIONAL IGNITION FACILITY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Annual Conference on Optical Engineering at the Lawrence Livermore National Laboratory CY JAN 28, 2004 CL San Jose, CA SP SPIE ID POTASSIUM DIHYDROGEN PHOSPHATE; NATIONAL IGNITION FACILITY; LASER-INDUCED DAMAGE; SILICA MULTILAYER COATINGS; SUBCRITICAL CRACK-GROWTH; FUSED-SILICA; RAPID-GROWTH; 351 NM; THRESHOLD PREDICTION; CONDITIONING METHODS AB The high-energy/high-power section of the NIF laser system contains 7360 meter-scale optics. Advanced optical materials and fabrication technologies needed to manufacture the NIF optics have been developed and put into production at key vendor sites. Production rates are up to 20 times faster and per-optic costs 5 times lower than could be achieved prior to the NIF. In addition, the optics manufactured for NIF are better than specification giving laser performance better than the design. A suite of custom metrology tools have been designed, built and installed at the vendor sites to verify compliance with NIF optical specifications. A brief description of the NIF optical wavefront specifications for the glass and crystal optics is presented. The wavefront specifications span a continuous range of spatial scale-lengths from 10 mum to 0.5 m (full aperture). We have continued our multi-year research effort to improve the lifetime (i.e. damage resistance) of bulk optical materials, finished optical surfaces and multi-layer dielectric coatings. New methods for post-processing the completed optic to improve the damage resistance have been developed and made operational. This includes laser conditioning of coatings, glass surfaces and bulk KDP and DKDP and well as raster and full aperture defect mapping systems. Research on damage mechanisms continues to drive the development of even better optical materials. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Campbell, JH (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave,L-491, Livermore, CA 94550 USA. RI Feit, Michael/A-4480-2009; Whitman, Pamela/B-2336-2013 NR 107 TC 94 Z9 96 U1 3 U2 36 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5249-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5341 BP 84 EP 101 DI 10.1117/12.538471 PG 18 WC Optics SC Optics GA BAJ02 UT WOS:000222485900008 ER PT S AU Suratwala, TI Campbell, JH Miller, PE Thorsness, CB Riley, MO Ehrmann, PR Steele, RA AF Suratwala, TI Campbell, JH Miller, PE Thorsness, CB Riley, MO Ehrmann, PR Steele, RA BE Lane, MA Wuest, CR TI Phosphate laser glass for NIF: production status, slab selection and recent technical advances SO OPTICAL ENGINEERING AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY II: THE NATIONAL IGNITION FACILITY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Annual Conference on Optical Engineering at the Lawrence Livermore National Laboratory CY JAN 28, 2004 CL San Jose, CA SP SPIE DE phosphate laser glass; high peak-power laser; National Ignition Facility; surface pitting; weathering; indentation fracture ID SUBCRITICAL CRACK-GROWTH AB The National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory is a stadium-sized high-energy (1.8 megajoule) / high-peak power (500 terawatt) laser system, which will utilize over 3000 meter-size Nd-doped metaphosphate glasses as its gain media. The current production status, the selection criteria of individual slabs for specific beam line locations, and some recent technical advances are reviewed. The glass blanks are manufactured by a novel continuous glass melting process, and the finished slabs are then prepared by epoxy bonding a Cu-doped phosphate glass edge cladding and by advanced finishing techniques. To date, nearly 3400 slab equivalents have been melted, 2600 have been rough-cut to blanks, 1200 have been finished, and 144 have been installed in NIF. A set of selection rules, which are designed to optimize laser performance (e.g., maintain gain balance between beam lines and minimize beam walkoff) and to maximize glass lifetime with respect to Pt damage site growth, have been established for assigning individual slabs to specific beam line locations. Recent technical advances for amplifier slab production, which include: 1) minimizing surface pitting (hazing) after final finishing; 2) minimizing humidity-induced surface degradation (weathering) upon storage and use; and 3) preventing mounting-induced surface fractures upon installation, have contributed in improving the laser glass quality. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Suratwala, TI (reprint author), Lawrence Livermore Natl Lab, POB 808,L-491, Livermore, CA 94551 USA. RI Suratwala, Tayyab/A-9952-2013 OI Suratwala, Tayyab/0000-0001-9086-1039 NR 29 TC 7 Z9 8 U1 3 U2 12 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5249-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5341 BP 102 EP 113 DI 10.1117/12.539689 PG 12 WC Optics SC Optics GA BAJ02 UT WOS:000222485900009 ER PT S AU Stolz, CJ Runkel, M McBurney, MS Cheek, R Menapace, JA AF Stolz, CJ Runkel, M McBurney, MS Cheek, R Menapace, JA BE Lane, MA Wuest, CR TI Metrology of mirrors for the National Ignition Facility SO OPTICAL ENGINEERING AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY II: THE NATIONAL IGNITION FACILITY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Annual Conference on Optical Engineering at the Lawrence Livermore National Laboratory CY JAN 28, 2004 CL San Jose, CA SP SPIE DE mirror; interferometry; metrology; photometry; laser conditioning ID WAVE-FRONT; MULTILAYER COATINGS; OPTICAL-COMPONENTS; LASER SYSTEM; SPECIFICATIONS; FABRICATION; DEPOSITION; GRADIENT AB The large-aperture (up to 40 cm x 80 cm) mirrors required for the 'National Ignition Facility have very stringent specifications. The specifications include requirements for transmitted and reflected wavefront over a wide spectral frequency, surface quality, laser resistance, spectral characteristics, etc. In order to validate optic performance, metrology tools were fielded at optic fabrication vendors to assure production control. These tools include interferometers, large-area conditioning stations, and photometers. Of the 1800 large-aperture mirrors required for the NIF, approximately 35% have been completed. This presentation will review the types of large-aperture mirrors used on NIF along with the performance of NIF optics as measured and received from our vendors. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Stolz, CJ (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave,L-491, Livermore, CA 94550 USA. NR 16 TC 10 Z9 10 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 0-8194-5249-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5341 BP 114 EP 120 DI 10.1117/12.538472 PG 7 WC Optics SC Optics GA BAJ02 UT WOS:000222485900010 ER PT S AU Hawley-Fedder, R Geraghty, P Locke, S McBurney, M Runkel, M Suratwala, T Thompson, S Wegner, P Whitman, P AF Hawley-Fedder, R Geraghty, P Locke, S McBurney, M Runkel, M Suratwala, T Thompson, S Wegner, P Whitman, P BE Lane, MA Wuest, CR TI NIF Pockels cell and frequency conversion crystals SO OPTICAL ENGINEERING AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY II: THE NATIONAL IGNITION FACILITY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Annual Conference on Optical Engineering at the Lawrence Livermore National Laboratory CY JAN 28, 2004 CL San Jose, CA SP SPIE DE frequency conversion; Pockels cell; crystal; fabrication; requirements; KDP; DKDP; National Ignition Facility ID RAPID GROWTH; KDP AB The National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory is a stadium-sized facility containing a 192-beam, 1.8-Megajoule, 500-Terawatt, ultraviolet laser system together with a 10-meter diameter target chamber with room for nearly 100 experimental diagnostics. Each beam line requires three different large-aperture optics made from single crystal potassium dihydrogen phosphate (KDP). KDP is used in the plasma electrode pockels cell (PEPC) and frequency doubling crystals, while deuterated KDP (DKDP) crystals are used for frequency tripling. Methods for reproducible growth of single crystals of KDP that meet all material requirements have been developed that enable us to meet the optics demands of the NIF. Once material properties are met, fabrication of high aspect ratio single OF crystal optics (42 x 42 x 1 cm) to meet laser performance specifications is the next challenge. More than 20% of the required final crystal optics have been fabricated and meet the stringent requirements of the NIF system. This manuscript summarizes the challenges and successes in the production of these large single-crystal optics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Hawley-Fedder, R (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94551 USA. RI Suratwala, Tayyab/A-9952-2013 OI Suratwala, Tayyab/0000-0001-9086-1039 NR 5 TC 21 Z9 22 U1 0 U2 7 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5249-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5341 BP 121 EP 126 DI 10.1117/12.538482 PG 6 WC Optics SC Optics GA BAJ02 UT WOS:000222485900011 ER PT S AU Larson, DW AF Larson, DW BE Lane, MA Wuest, CR TI NIF laser line-replaceable units (LRUs) SO OPTICAL ENGINEERING AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY II: THE NATIONAL IGNITION FACILITY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Annual Conference on Optical Engineering at the Lawrence Livermore National Laboratory CY JAN 28, 2004 CL San Jose, CA SP SPIE DE fusion; high-energy lasers; laser fusion; solid state lasers AB The National Ignition Facility (NIF) is designed with its high-value optical systems in cassettes called line-replaceable Units (LRUs). Virtually all of NIFs active components are assembled in one of approximately 4000 electrical and optical LRUs that serve between two and eight of NIF's 192 laser beamlines. Many of these LRUs are optomechanical assemblies that are roughly the size of a telephone booth. The primary design challenges for this hardware include meeting stringent mechanical precision, stability, and cleanliness requirements. Pre-production units of each LRU type have been fielded on the first bundle of NIF and have been used to demonstrate that NIF meets its performance objectives. This presentation provides an overview of NIF LRUs-and their design and production plans for building out the remaining NIF bundles. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Larson, DW (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA. NR 3 TC 11 Z9 11 U1 0 U2 7 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5249-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5341 BP 127 EP 136 DI 10.1117/12.538467 PG 10 WC Optics SC Optics GA BAJ02 UT WOS:000222485900012 ER PT S AU Bonanno, RE AF Bonanno, RE BE Lane, MA Wuest, CR TI Assembling and installing LRUs for NIF SO OPTICAL ENGINEERING AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY II: THE NATIONAL IGNITION FACILITY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Annual Conference on Optical Engineering at the Lawrence Livermore National Laboratory CY JAN 28, 2004 CL San Jose, CA SP SPIE AB Within the 192 National Ignition Facility (NIF) beamlines, there are over 7000 large (40 X 40 cm) optical components, including laser glass, mirrors, lenses, and polarizers. These optics are held in large opto-mechanical assemblies called line-replaceable units (LRUs). Each LRU has strict specifications with respect to cleanliness, alignment, and wavefront so that once activated, each NIF beamline will meet its performance requirements. NIF LRUs are assembled, tested, and refurbished in on-site cleanroom facilities. The assembled LRUs weigh up to 1800 kilograms, and are about the size of a phone booth. They are transported in portable clean canisters and inserted into the NIF beampath using robotic transporters. This plug and play design allows LRUs to be easily removed from the beampath for maintenance or upgrades. Commissioning of the first NIF quad, an activity known as NIF Early Light (NEL), has validated LRU designs and architecture, as well as demonstrated that LRUs can be assembled and installed as designed. Furthermore, it has served to develop key processes and tools forming the foundation for NIF s long-term LRU production and maintenance strategy. As we look forward to building out the rest of NIF, the challenge lies in scaling up the production rate while maintaining quality, implementing process improvements, and fully leveraging the learning and experience gained from NEL. This paper provides an overview of the facilities, equipment and processes used to assemble and install LRUs in NIF. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Bonanno, RE (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave,L-466, Livermore, CA 94550 USA. NR 4 TC 5 Z9 5 U1 0 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 0-8194-5249-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5341 BP 137 EP 145 DI 10.1117/12.538479 PG 9 WC Optics SC Optics GA BAJ02 UT WOS:000222485900013 ER PT S AU Wisoff, PJ Bowers, MW Erbert, GV Browning, DF Jedlovec, DR AF Wisoff, PJ Bowers, MW Erbert, GV Browning, DF Jedlovec, DR BE Lane, MA Wuest, CR TI NIF injection laser system SO OPTICAL ENGINEERING AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY II: THE NATIONAL IGNITION FACILITY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Annual Conference on Optical Engineering at the Lawrence Livermore National Laboratory CY JAN 28, 2004 CL San Jose, CA SP SPIE DE fusion; high energy lasers; laser fusion; solid state lasers AB The National Ignition Facility (NIF) is a high-power, 192-beam laser facility being built at the Lawrence Livermore National Laboratory. The 192 laser beams that will converge on the target at the output of the NIF laser system originate from a low power fiber laser in the Master Oscillator Room (MOR). The MOR is responsible for generating the single pulse that seeds the entire NIF laser system. This single pulse is phase-modulated to add bandwidth, and then amplified and split into 48 separate beam lines all in single-mode polarizing fiber. Before leaving the MOF, each of the 48 output pulses are temporally sculpted into high contrast shapes using Arbitrary Waveform Generators (AWG). Each output pulse is then carried by optical fiber to the Preamplifier Module (PAM) where it is amplified to the multi-joule level using a diode-pumped regenerative amplifier and a multi-pass, flashlamp-pumped rod amplifier. Inside the PAM, the beam is spatially shaped to pre-compensate for the spatial gain profile in the main laser amplifiers. The output from the PAM is sampled by a diagnostic package called the Input Sensor Package (ISP) and then split into four beams in the Preamplifier Beam Transport System (PABTS). Each of these four beams is injected into one of NIF's 192 beam lines. The combination of the MOR, PAM, ISP and PABTS constitute the Injection Laser System (ILS) for NIF. This system has proven its flexibility of providing a wide variety of pulse shapes and energies during the first experiments utilizing four beam lines of NIF. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Wisoff, PJ (reprint author), Lawrence Livermore Natl Lab, M-S L-464,7000 East Ave, Livermore, CA 94550 USA. NR 0 TC 25 Z9 25 U1 2 U2 8 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5249-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5341 BP 146 EP 155 DI 10.1117/12.538466 PG 10 WC Optics SC Optics GA BAJ02 UT WOS:000222485900014 ER PT S AU Arnold, PA Ollis, CW Hinz, A Robb, C Primdahl, KA Watson, JJ O'Brien, MD Funkhouser, WG Biltoft, PJ Shelton, RT Tapley, WC DeHope, WJ AF Arnold, PA Ollis, CW Hinz, A Robb, C Primdahl, KA Watson, JJ O'Brien, MD Funkhouser, WG Biltoft, PJ Shelton, RT Tapley, WC DeHope, WJ BE Lane, MA Wuest, CR TI Deployment, commissioning and operation of plasma electrode Pockels cells in the National Ignition Facility SO OPTICAL ENGINEERING AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY II: THE NATIONAL IGNITION FACILITY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Annual Conference on Optical Engineering at the Lawrence Livermore National Laboratory CY JAN 28, 2004 CL San Jose, CA SP SPIE DE Pockels cell; plasma electrode; electrooptical switch; pulse generator; NIF; National Ignition Facility ID OPTICAL SWITCHES AB Large aperture Plasma Electrode Pockels Cells (PEPCs) are an enabling technology in the National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory. The Pockels cells allow the NIF laser to take advantage of multipass main amplifier architecture, thus reducing costs and physical size of the facility. Each Pockels cell comprises four 40-cm x 40-cm apertures arranged in a 4x1 array. The combination of the Pockels cell and a thin-film polarizer, also configured in a 4x1 array, forms an optical switch that is key to achieving the required multi-pass operation. The operation of the PEPC is a follows: Before the arrival of the laser pulse, optically transparent, low-density helium plasmas are initiated to serve as electrodes for the KDP crystals mounted in the Pockels cell. During beam propagation through the main laser cavity a longitudinal electric field is impressed on the electro-optic crystals. The polarization of the propagating beams is rotated by 90degrees on each of two passes, thereby allowing the beam to be trapped in the main laser amplifier cavity for a total of four passes before being switched out into the cavity spatial filter. The physics aspects of the PEPC are well documented. Consequently, this paper will emphasize the PEPC subsystem in the context of its role and relevance within the broader NIF laser system, provide a view of the complexity of the subsystem and give an overview of PEPCs interactions with other elements of NIF, including interfaces to the Beamline Infrastructure, the NIF Timing Subsystem, and the Integrated Computer Control System (ICCS); along with dependence on the Optics Production, Transport and Handling (T&H), and Assembly, Integration and Refurbishment (AIR) and Operations organizations. Further, we will discuss implementation details related to the functional blocks and individual components that comprise PEPC, with particular emphasis on the unique constraints placed on the elements and the attendant engineering solutions. Finally, we describe performance, fabrication and assembly requirements unique to PEPC and the various considerations necessary for successfully commissioning and operation of each PEPC unit. These considerations include, but are not limited to, materials choices, materials preparation and processing (especially cleanliness), inspection, pre- and post-assembly testing. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Arnold, PA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 8 TC 9 Z9 9 U1 0 U2 5 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5249-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5341 BP 156 EP 167 DI 10.1117/12.538468 PG 12 WC Optics SC Optics GA BAJ02 UT WOS:000222485900015 ER PT S AU Zacharias, RA Beer, NR Bliss, ES Burkhart, SC Cohen, SJ Sutton, SB Van Atta, RL Winters, SE Salmon, JT Stolz, CJ Pigg, DC Arnold, TJ AF Zacharias, RA Beer, NR Bliss, ES Burkhart, SC Cohen, SJ Sutton, SB Van Atta, RL Winters, SE Salmon, JT Stolz, CJ Pigg, DC Arnold, TJ BE Lane, MA Wuest, CR TI National ignition facility alignment and wavefront control SO OPTICAL ENGINEERING AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY II: THE NATIONAL IGNITION FACILITY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Annual Conference on Optical Engineering at the Lawrence Livermore National Laboratory CY JAN 28, 2004 CL San Jose, CA SP SPIE DE wavefront control; wavefront correction; adaptive optics; laser alignment; alignment systems; high power lasers ID NIF AB The National Ignition Facility (NIF) at the Lawrence Livermore National Laboratory is a stadium-sized facility containing a 192-beam, 1.8-Megajoule, 500-Terawatt, ultraviolet laser system. High-energy-density and inertial confinement fusion physics experiments require the ability to precisely align and focus pulses with single beam energy up to 20KJ in a few nanoseconds onto mm-sized targets. NIF's alignment control system now regularly provides automatic alignment of the four commissioned beams prior to every NIF shot in approximately 45min., and speed improvements are being implemented. NIF utilizes adaptive optics for wavefront control, which significantly improves the ability to tightly focus each laser beam onto a target. Multiple sources of both static and dynamic aberration are corrected. This presentation provides an overview of the NIF Automatic Alignment and Wavefront Control Systems including the accuracy and target spot size performance achieved. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Zacharias, RA (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA. NR 11 TC 14 Z9 15 U1 0 U2 5 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5249-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5341 BP 168 EP 179 DI 10.1117/12.538469 PG 12 WC Optics SC Optics GA BAJ02 UT WOS:000222485900016 ER PT S AU Wegner, P Auerbach, J Biesiada, T Dixit, S Lawson, J Menapace, J Parham, T Swift, D Whitman, P Williams, W AF Wegner, P Auerbach, J Biesiada, T Dixit, S Lawson, J Menapace, J Parham, T Swift, D Whitman, P Williams, W BE Lane, MA Wuest, CR TI NIF final optics system: frequency conversion and beam conditioning SO OPTICAL ENGINEERING AT THE LAWRENCE LIVERMORE NATIONAL LABORATORY II: THE NATIONAL IGNITION FACILITY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd Annual Conference on Optical Engineering at the Lawrence Livermore National Laboratory CY JAN 28, 2004 CL San Jose, CA SP SPIE DE NIF; frequency conversion; diffractive optics; solid-state lasers; ICF ID SUPPRESSION; LASER AB Installation and commissioning of the first of forty-eight Final Optics Assemblies on the National Ignition Facility was completed this past year. This activity culminated in the delivery of first light to a target. The final optics design is described and selected results from first-article commissioning and performance tests are presented. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Wegner, P (reprint author), Lawrence Livermore Natl Lab, POB 808, Livermore, CA 94550 USA. NR 11 TC 47 Z9 48 U1 2 U2 20 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5249-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5341 BP 180 EP 189 DI 10.1117/12.538481 PG 10 WC Optics SC Optics GA BAJ02 UT WOS:000222485900017 ER PT S AU Ealet, A Prieto, E Bonissent, A Malina, R Smadja, G Tilquin, A Bernstein, G Basa, S Fouchez, D LeFevre, O Mazure, A Aldering, G Amanullah, R Bohlin, R Bower, C Brown, M Campbell, M Carithers, W Commins, E Craig, W Day, C DeJongh, F Deustua, S Diehl, HT Dodelson, S Ellis, R Emmet, M Frieman, J Fruchter, A Gerdes, D Gladney, L Goldhaber, G Goobar, A Groom, D Heetderks, H Hoff, M Holland, S Huffer, M Hui, L Huterer, D Jain, B Jelinsky, P Karcher, A Kent, S Kahn, S Kim, A Kolbe, W Krieger, B Kushner, G Kuznetsova, N Lafever, R Lamoureux, J Lampton, M Levi, M Limon, P Lin, H Linder, E Loken, S Lorenzon, W Marriner, J Marshall, P Massey, R McKay, T McKee, S Miquel, R Morgan, N Mortsell, E Mostek, N Mufson, S Musser, J Nugent, P Oluseyi, H Pain, R Palaio, N Pankow, D Peoples, J Perlmutter, S Rabinowitz, D Refregier, A Rhodes, J Roe, N Rusin, D Scrapine, V Schubnell, M Sholl, M Smith, RM Smoot, G Snyder, J Spadafora, A Stebbins, A Stoughton, C Szymkowiak, A Tarle, G Taylor, K Tomasch, A Tucker, D von der Lippe, H Vincent, D Walder, JP Wang, G Wester, W AF Ealet, A Prieto, E Bonissent, A Malina, R Smadja, G Tilquin, A Bernstein, G Basa, S Fouchez, D LeFevre, O Mazure, A Aldering, G Amanullah, R Bohlin, R Bower, C Brown, M Campbell, M Carithers, W Commins, E Craig, W Day, C DeJongh, F Deustua, S Diehl, HT Dodelson, S Ellis, R Emmet, M Frieman, J Fruchter, A Gerdes, D Gladney, L Goldhaber, G Goobar, A Groom, D Heetderks, H Hoff, M Holland, S Huffer, M Hui, L Huterer, D Jain, B Jelinsky, P Karcher, A Kent, S Kahn, S Kim, A Kolbe, W Krieger, B Kushner, G Kuznetsova, N Lafever, R Lamoureux, J Lampton, M Levi, M Limon, P Lin, H Linder, E Loken, S Lorenzon, W Marriner, J Marshall, P Massey, R McKay, T McKee, S Miquel, R Morgan, N Mortsell, E Mostek, N Mufson, S Musser, J Nugent, P Oluseyi, H Pain, R Palaio, N Pankow, D Peoples, J Perlmutter, S Rabinowitz, D Refregier, A Rhodes, J Roe, N Rusin, D Scrapine, V Schubnell, M Sholl, M Smith, RM Smoot, G Snyder, J Spadafora, A Stebbins, A Stoughton, C Szymkowiak, A Tarle, G Taylor, K Tomasch, A Tucker, D von der Lippe, H Vincent, D Walder, JP Wang, G Wester, W BE Mather, JC TI An integral field spectrograph for SNAP SO OPTICAL, INFRARED, AND MILLIMETER SPACE TELESCOPES, PTS 1-3 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Optical, Infrared, and Millimeter Space Telescopes CY JUN 21-25, 2004 CL Glasgow, SCOTLAND SP SPIE, Amer Astron Soc, Assoc Univ Res Astron Inc, European Astron Soc, European Opt Soc, European SO Observ, Inst Astrofis Canarias, Int Astron Union, Jet Propuls Lab, Max-Planck Inst Extraterr Phys, NASA Goddard Space Flight Ctr, Natl Astron Obser Network, Opt Infrared Coordinat Network, Particle Phys & Astron Res Council, Adv Radio Astron Europe, Royal Astron Soc, Scottish Enterprise, Smart Opt Faraday Partnership, UK Astron Technol Ctr DE SNAP; supernovae; integral field; spectrograph; image slicer ID IMAGE-SLICER; SPECTROSCOPY; RESOLUTION; DESIGN AB A well-adapted spectrograph concept has been developed for the SNAP (SuperNova/Acceleration Probe) experiment. The goal is to ensure proper identification of Type Ia supernovae and to standardize the magnitude of each candidate by determining explosion parameters. The spectrograph is also a key element for the calibration of the science mission. An instrument based on an integral field method with the powerful concept of imager slicing has been designed and is presented in this paper. The spectrograph concept is optimized to have high efficiency and low spectral resolution (Rsimilar to100), constant through the wavelength range (0.35-1.7mum), adapted to the scientific goals of the mission. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Ealet, A (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RI Roe, Natalie/A-8798-2012; Holland, Stephen/H-7890-2013; OI malina, roger/0000-0003-3399-3865; Tucker, Douglas/0000-0001-7211-5729; Massey, Richard/0000-0002-6085-3780 NR 16 TC 5 Z9 5 U1 0 U2 3 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5419-2 J9 P SOC PHOTO-OPT INS PY 2004 VL 5487 BP 1587 EP 1597 DI 10.1117/12.550600 PN 1-3 PG 11 WC Engineering, Aerospace; Instruments & Instrumentation; Optics SC Engineering; Instruments & Instrumentation; Optics GA BBE11 UT WOS:000225098600158 ER PT J AU Yao, XC Zhang, DZ AF Yao, XC Zhang, DZ TI Micro-rotation by flow-induced torque in an optical trap SO OPTICAL REVIEW LA English DT Article DE micromanipulator; optical tweezers; optical trapping; micro-rotation; torque ID ANGULAR-MOMENTUM TRANSFER; LASER-BEAM; PARTICLES; FORCE AB We report a new, simplified mechanism for performing micro-rotation. A sample chamber filled with aqueous solution and mounted on a piezoelectric transducer (PZT)-driven stage was used to produce flow-induced torque for rotating micro-objects. We demonstrated the scheme by rotating ellipsoidal yeast particles and a two-sphere system with 20 mW of laser power. Clockwise or counterclockwise rotation could be controlled by changing the initial angular position of the object trapped and by reversing the direction of the PZT-driven stage. This mechanism has potential applications in microfabrication, biotechnology and fluidic technology. C1 Los Alamos Natl Lab, Biol & Quantum Phys Grp, Los Alamos, NM 87545 USA. Chinese Acad Sci, Inst Phys, Opt Phys Lab, Beijing 100080, Peoples R China. Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China. RP Yao, XC (reprint author), Los Alamos Natl Lab, Biol & Quantum Phys Grp, MS-D454, Los Alamos, NM 87545 USA. EM xyao@lanl.gov NR 16 TC 1 Z9 1 U1 0 U2 1 PU OPTICAL SOC JAPAN PI TOKYO PA KUDAN-KITA BLDG 5F, 1-12-3, KUDAN-KITA CHIYODA-KU, TOKYO, 102, JAPAN SN 1340-6000 J9 OPT REV JI Opt. Rev. PD JAN-FEB PY 2004 VL 11 IS 1 BP 4 EP 6 DI 10.1007/s10043-004-0004-8 PG 3 WC Optics SC Optics GA 813AX UT WOS:000220881100002 ER PT S AU Reichhardt, C Reichhardt, CJO AF Reichhardt, C Reichhardt, CJO BE Dholakia, K Spalding, GC TI Statics and dynamics of colloidal particles in periodic traps SO OPTICAL TRAPPING AND OPTICAL MICROMANIPULATION SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Optical Trapping and Optical Micromanipulation CY AUG 02-06, 2004 CL Denver, CO SP SPIE DE colloids; melting; dynamics; crystals ID SUPERCONDUCTING FILMS; VORTEX LATTICES; REGULAR ARRAY; PHASE-LOCKING; MAGNETIC DOTS; COMMENSURATE; GRAPHITE; DEFECTS AB We show with computer simulations that a rich variety of static and dynamical colloidal phases can be realized for colloids interacting with two-dimensional periodic substrates. For the static case a new type of colloidal state that we term colloidal molecular crystals occurs when there is an integer number of colloids per substrate minima. Here there is a novel orientational ordering in addition to the positional ordering of the colloids. The colloidal molecular crystals exhibit a multi-step melting in which the orientational ordering is lost first, followed by the positional ordering. This multi-step melting phenomenon agrees well with recent experiments. Additionally we show that at fillings where the number of colloids is an incommensurate fraction of the number of substrate minima, as a function of temperature there is a transition to a state in which local incommensurations become thermally activated. With an applied drive we find that a remarkable number of distinct dynamical phases can be realized, including ordered and disordered flows. We also illustrate flow phases in which the colloidal motion locks to a symmetry direction of the underlying lattice. C1 Los Alamos Natl Lab, T CNLS, Los Alamos, NM USA. RP Reichhardt, C (reprint author), Los Alamos Natl Lab, T CNLS, Los Alamos, NM USA. NR 26 TC 2 Z9 2 U1 0 U2 2 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5452-4 J9 P SOC PHOTO-OPT INS PY 2004 VL 5514 BP 352 EP 364 DI 10.1117/12.558964 PG 13 WC Optics SC Optics GA BBN52 UT WOS:000226283000039 ER PT S AU Wojcik, MD Myers, TL Taubman, MS Cannon, BD Broocks, B Mosely, T AF Wojcik, MD Myers, TL Taubman, MS Cannon, BD Broocks, B Mosely, T BE Carrano, JC Zukauskas, A TI Quantum cascade laser development efforts for implementation into chemical and remote sensing systems SO OPTICALLY BASED BIOLOGICAL AND CHEMICAL SENSING FOR DEFENCE SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Optically Based Biological and Chemical Sensing for Defence CY OCT 25-28, 2004 CL London, ENGLAND DE quantum cascade laser; infrared; remote sensing; chemical sensing; external cavity; frequency stabilization ID DIODE-LASERS; SPECTROSCOPY; OPERATION AB Quantum cascade lasers (QCL) offer many desirable attributes as mid-infrared laser sources for chemical and remote sensing. Some key advantages are a narrow linewidth, wide bandwidth current modulation characteristics and moderate tunability (15 cm(-1)). Combined, these characteristics allow for applications to a wide variety of chemical and remote sensing techniques such as wavelength and frequency modulation based detection techniques, cavity enhanced point sensors as well as techniques such as LIDAR and DIAL. This paper will describe laser development efforts to enhance QCL frequency stabilization and QCL injection locking and to develop robust external cavity QCL designs. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Wojcik, MD (reprint author), Pacific NW Natl Lab, POB 999,K5-25, Richland, WA 99352 USA. NR 14 TC 2 Z9 2 U1 1 U2 2 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5570-9 J9 P SOC PHOTO-OPT INS PY 2004 VL 5617 BP 154 EP 165 DI 10.1117/12.601503 PG 12 WC Optics; Physics, Applied SC Optics; Physics GA BBO70 UT WOS:000226748300016 ER PT S AU Kjornrattanawanich, B Bajt, S Seely, JF AF Kjornrattanawanich, B Bajt, S Seely, JF BE Citterio, O ODell, SL TI Multilayer-coated photodiodes with polarization sensitivity at EUV wavelength SO OPTICS FOR EUV, X-RAY AND GAMMA-RAY ASTRONOMY SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Optics for EUV, X-Ray and Gamma-Ray Astronomy CY AUG 04-07, 2003 CL San Diego, CA SP SPIE AB The design of Mo/Si and Mo/Y multilayers; as EUV polarizers is presented. The polarization performance of these multilayers was calculated based on their optical properties at around Brewster angles. The polarization results of a silicon photodiode that was coated with an interface-engineered Mo/Si multilayer are described. The sensitivity of this specially-coated photodiode and its polarization responses were determined from both reflectance and transmittance of the multilayer coating, using synchrotron radiation. The multilayer reflected 69.8% of s-polarized light and only 2.4% of p-polarized light, therefore transmitted about 0.2% s-polarized light and 8.4% p-polarized light at 13.5 nm to the underlying photodiode substrate. A polarization ratio based on transmittance values, (Tp-Ts)/(Tp+Ts), of 95% was achieved with sufficiently high sensitivity. This result demonstrates the usefulness of Mo/Si multilayer-coated photodiodes as future EUV polarimeters. C1 Univ Space Res Assoc, Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA. RP Kjornrattanawanich, B (reprint author), Univ Space Res Assoc, Brookhaven Natl Lab, Natl Synchrotron Light Source, Beamlin X24C, Upton, NY 11973 USA. NR 4 TC 1 Z9 1 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 0-8194-5041-3 J9 P SOC PHOTO-OPT INS PY 2004 VL 5168 BP 31 EP 34 DI 10.1117/12.507115 PG 4 WC Astronomy & Astrophysics; Instruments & Instrumentation; Optics SC Astronomy & Astrophysics; Instruments & Instrumentation; Optics GA BY61L UT WOS:000189421500004 ER PT J AU Baker, KL Stappaerts, EA Wilks, SC Young, PE Gavel, DT Tucker, JW Silva, DA Olivier, SS AF Baker, KL Stappaerts, EA Wilks, SC Young, PE Gavel, DT Tucker, JW Silva, DA Olivier, SS TI Open- and closed-loop aberration correction by use of a quadrature interferometric wave-front sensor SO OPTICS LETTERS LA English DT Article AB Experimental results are presented for an adaptive optics system based on a quadrature Twyman-Green interferometric wave-front sensor. The system uses a circularly polarized reference beam to form two interferograms with a pi/2 phase shift. The experiments conducted used Kolmogorov phase screens to simulate atmospheric phase distortions. Strehl ratio improvements by a factor of 8, to an absolute value of 0.45, are demonstrated. (C) 2004 Optical Society of America. C1 Lawrence Livermore Natl Lab, Livermore, CA USA. RP Baker, KL (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA USA. NR 6 TC 13 Z9 13 U1 1 U2 2 PU OPTICAL SOC AMER PI WASHINGTON PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA SN 0146-9592 J9 OPT LETT JI Opt. Lett. PD JAN 1 PY 2004 VL 29 IS 1 BP 47 EP 49 DI 10.1364/OL.29.000047 PG 3 WC Optics SC Optics GA 757GB UT WOS:000187552800015 PM 14719656 ER PT S AU Rimmelzwaan, GF Boon, ACM de Mutsert, G Fouchier, RAM van Baarle, D Smith, DJ Lapedes, AS Sintnicolaas, K Osterhaus, ADME AF Rimmelzwaan, GF Boon, ACM de Mutsert, G Fouchier, RAM van Baarle, D Smith, DJ Lapedes, AS Sintnicolaas, K Osterhaus, ADME BE Kawaoka, Y TI Recognition of influenza virus epitope variants by human CTL SO OPTIONS FOR THE CONTROL OF INFLUENZA V SE INTERNATIONAL CONGRESS SERIES LA English DT Proceedings Paper CT 5th International Conference on Options for the Control of Influenza CY OCT 07-11, 2003 CL Okinawa, JAPAN SP Pharmaceut Manufacturers Assoc Tokyo, Pharmaceut Assoc Osaka, Wyeth Vaccine, MedImmune, Fujirebio, Nagoya City Univ, Takara Bio, Rikaken, Japan Bio Sci Lab, Japanese Soc Control Influenza, Japanese Fdn Promot Int Med Res Corp, Japanese Soc Virol, Japanese Soc Clin Virol, NPO Biomed Sci Assoc, WHO, Minist Hlth, Labor & Welfare Japan DE cytotoxic T-lymphocytes; epitopes; escape ID CYTOTOXIC T-LYMPHOCYTES; ESCAPE; NUCLEOPROTEIN AB Recently, an HLA-B*3501-restricted cytotoxic T-lymphocytes (CTL) epitope in the nucleoprotein (NP418-426) of influenza A viruses was identified, which exhibited a high degree of variability. In the present study, the recognition of epitope variants by human cytotoxic T-lymphocytes (CTL) was investigated. Human CD8+ CTL clones were specific for NP418-426 epitope variants within one subtype of influenza virus or cross-reactive with hetero-subtypic variants. Positions in the 9-mer were identified as determinants of CTL-specificity. The in vivo existence of T cells cross-reactive with homo- and hetero-subtypic variants of the epitope was confirmed with virus-specific polyclonal T cell populations obtained from HLA-B*3501+ blood donors. Based on CTL recognition patterns and the history of infection as assessed by serology, it was hypothesized that consecutive infections with influenza viruses containing different variants of the epitope select for cross-reactive T cells in vivo. (C) 2004 Elsevier B.V. All rights reserved. C1 Erasmus MC, Inst Virol, NL-3015 GE Rotterdam, Netherlands. Univ Cambridge, Cambridge CB2 1TN, England. Santa Fe Inst, Santa Fe, NM 87501 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Sanquin Bloodbank, Rotterdam, Netherlands. RP Rimmelzwaan, GF (reprint author), Erasmus MC, Inst Virol, Dr Molewaterpl 50, NL-3015 GE Rotterdam, Netherlands. RI Fouchier, Ron/A-1911-2014 OI Fouchier, Ron/0000-0001-8095-2869 NR 5 TC 0 Z9 0 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0531-5131 BN 0-444-51639-5 J9 INT CONGR SER PY 2004 VL 1263 BP 145 EP 148 DI 10.1016/j.ics.2004.02.061 PG 4 WC Infectious Diseases; Virology SC Infectious Diseases; Virology GA BAU81 UT WOS:000223655000031 ER PT S AU Yan, XM Tang, AJ Schielke, EG Hang, W Nolan, JP AF Yan, XM Tang, AJ Schielke, EG Hang, W Nolan, JP BE Kawaoka, Y TI On the development of a microsphere-based multiplexed immunoassay for influenza virus typing and subtyping by flow cytometry SO OPTIONS FOR THE CONTROL OF INFLUENZA V SE INTERNATIONAL CONGRESS SERIES LA English DT Proceedings Paper CT 5th International Conference on Options for the Control of Influenza CY OCT 07-11, 2003 CL Okinawa, JAPAN SP Pharmaceut Manufacturers Assoc Tokyo, Pharmaceut Assoc Osaka, Wyeth Vaccine, MedImmune, Fujirebio, Nagoya City Univ, Takara Bio, Rikaken, Japan Bio Sci Lab, Japanese Soc Control Influenza, Japanese Fdn Promot Int Med Res Corp, Japanese Soc Virol, Japanese Soc Clin Virol, NPO Biomed Sci Assoc, WHO, Minist Hlth, Labor & Welfare Japan DE influenza virus; multiplexed immunoassay; flow cytometry; microsphere AB A rapid and sensitive multiplexed, microsphere-based immunoassay was developed for simultaneous typing and subtyping of the influenza virus by flow cytometry. Influenza virus type- and/or subtype-specific monoclonal antibodies (capture antibodies) were covalently coupled to size-or color-coded microspheres. The antibody-coupled microspheres were used to capture the influenza viruses in the sample, and the bound viruses were then detected and quantified with a cocktail of fluorochrome-conjugated, influenza virus-specific polyclonal antibodies (reporter antibodies) using flow cytometry. By utilizing appropriate size-or color-coded microspheres, the multiplexed immunoassay can be readily formatted into a duplexed assay for influenza virus typing (A vs. B) or a four-plexed assay for simultaneous typing and subtyping (A vs. B and H1 vs. H3). (C) 2004 Elsevier B.V. All rights reserved. C1 Los Alamos Natl Lab, Natl Flow Cytometry Resource Ctr, Biosci Div, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. RP Yan, XM (reprint author), Los Alamos Natl Lab, Natl Flow Cytometry Resource Ctr, Biosci Div, MS M888, Los Alamos, NM 87545 USA. NR 5 TC 5 Z9 5 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0531-5131 BN 0-444-51639-5 J9 INT CONGR SER PY 2004 VL 1263 BP 342 EP 345 DI 10.1016/j.ics.2004.02.075 PG 4 WC Infectious Diseases; Virology SC Infectious Diseases; Virology GA BAU81 UT WOS:000223655000076 ER PT J AU Liliental-Weber, Z Jasinski, J Zakharov, DN AF Liliental-Weber, Z Jasinski, J Zakharov, DN TI GaN grown in polar and non-polar directions SO OPTO-ELECTRONICS REVIEW LA English DT Article; Proceedings Paper CT 4th International Conference on Solid State Crystals/7th Polish Conference on Crystal Growth CY MAY 16-20, 2004 CL Zakopane Koscielisko, POLAND SP Polish Soc Crystal Growth DE GaN films; MBE growth; HVPE; dislocations; polar and non-polar growth ID SCREW DISLOCATIONS; EPITAXIAL-GROWTH; LASER-DIODES; NITRIDES; POLARIZATION; OPERATION; PRESSURE; PLANE; LAYER AB In this paper; defects formed in GaN grown by different methods are reviewed. thin GaN films were grown on c-, m- and a-planes on a number of substrates and typical defects as characterized by transmission electron microscopy are described. For polar epilayers grown on c-plane sapphire the typical defects are dislocations (edge, screw and mixed). The lowest dislocation density was obtained for homoepitaxial growth using molecular beam epitaxy (MBE) or hydride vapour phase epitaxy (HVPE). In these cases, the core structure of screw dislocations were studies in detail. In both cases, the cores are full. In the layers grown by HVPE the dislocations are decorated by pinholes stacked on top of each other. These pinholes are empty inside and their formation is attributed to impurities (oxygen) present in these layers. In these layers Ga-rich cores have been found. These were not observed in the layers grown by MBE on the top of the HVPE templates. Epilayers grown in non-polar directions (m- or a-plane) have a high density of planar defects (stacking faults) terminated by partial dislocations. Only low energy faults were found. The majority of these faults are formed at the interface with the substrate and propagate to the sample surface. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Lawrence Berkeley Lab, 62-203, Berkeley, CA 94720 USA. EM z_liliental-weber@lbl.gov RI Liliental-Weber, Zuzanna/H-8006-2012; Zakharov, Dmitri/F-4493-2014 NR 32 TC 32 Z9 33 U1 2 U2 12 PU WALTER DE GRUYTER GMBH PI BERLIN PA GENTHINER STRASSE 13, D-10785 BERLIN, GERMANY SN 1230-3402 EI 1896-3757 J9 OPTO-ELECTRON REV JI Opto-Electron. Rev. PY 2004 VL 12 IS 4 BP 339 EP 346 PG 8 WC Engineering, Electrical & Electronic; Optics; Physics, Applied SC Engineering; Optics; Physics GA 892FN UT WOS:000226635500002 ER PT B AU Geiser, U Wang, HH Han, CY Willing, GA AF Geiser, U Wang, HH Han, CY Willing, GA BE Ouahab, L Yagubskii, E TI The role of organic conductors in a world of nanoscience SO ORGANIC CONDUCTORS, SUPERCONDUCTORS AND MAGNETS: FROM SYNTHESIS TO MOLECULAR ELECTRONICS SE NATO SCIENCE SERIES, SERIES II: MATHEMATICS, PHYSICS AND CHEMISTRY LA English DT Proceedings Paper CT Conference of the NATO Advanced-Study-Institute on Organic Conductors, Superconductors and Magnets CY APR 29-MAY 11, 2003 CL Corfu, GREECE SP NATO Adv Study Inst, NATO Sci Affairs Div, CNRS, Univ Rennesl ID CHARGE-TRANSFER SALTS; THIN-FILMS AB Nanoscience, i.e., the study of assemblies from the submicroscopic (in the optical spectrum) to the molecular length scale, is one of the most pervasive topics in current materials chemistry and physics research, with interdisciplinary potential from biology to engineering. Nanoscience opportunities for molecular conductors research exists especially in the area of patterned conducting films, which could eventually lead to molecular electronics applications. Our work has focussed on the fabrication of micro- and nanocrystalline films of BEDT-TTF and their conducting salts on noble metal-coated substrates, where the crystallization was forced to follow previously deposited nanoscale patterns of specially derivatized thiols. These patterns were produced either by the dip-pen nanolithography or micro-contact printing techniques. In preparation for the advent of new focussed synchrotron beam lines with 10-20 nm spot sizes, we have mapped the sulfur Kalpha fluorescence emitted by the patterned BEDT-TTF films. The sulfur fluorescence distribution is a sensitive tool to assess the quality of the deposited patterns. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Geiser, U (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 18 TC 1 Z9 1 U1 1 U2 1 PU SPRINGER PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 1-4020-1941-6 J9 NATO SCI SER II MATH PY 2004 VL 139 BP 231 EP 239 PG 9 WC Chemistry, Inorganic & Nuclear; Chemistry, Organic; Engineering, Electrical & Electronic; Physics, Atomic, Molecular & Chemical; Physics, Condensed Matter SC Chemistry; Engineering; Physics GA BY84J UT WOS:000189476500014 ER PT J AU Wang, RL Brassell, SC Scarpitta, SC Zheng, MP Zhang, SC Hayde, PR Muench, LM AF Wang, RL Brassell, SC Scarpitta, SC Zheng, MP Zhang, SC Hayde, PR Muench, LM TI Steroids in sediments from Zabuye Salt Lake, western Tibet: diagenetic, ecological or climatic signals? SO ORGANIC GEOCHEMISTRY LA English DT Article ID METHYLOCOCCUS-CAPSULATUS; HYDROCARBONS; STERANES; PETROLEUM; CARBON; IDENTIFICATION; INDICATORS; PYROLYSIS; SULFUR AB A 45 cm long core from Zabuye Salt Lake (Tibetan Plateau, S.W China) was studied to reveal the possible interference between diagenesis and climate signals. Steroids, including sterols and sterenes, dominate the soluble organic matter in these cores. The relative abundance of C-27 sterol to the C-29 sterols decreases with depth, resulting in a predominance of C-29 sterols at the bottom section of this core. This change in the relative molecular distribution could be attributed to both environmental/ecological change and diagenetic complication of molecular signals. Sterols in the shallow sediments are relatively enriched in C-13 compared to those from lower within the core. This enrichment is possibly associated either with environmental/climatic change (e.g., increase of salinity and global pCO(2) level change etc.) or it could be attributed to the biogeochemical change of organic matter during early diagenesis. 4,4-Dimethyl spirosterenes and their possible precursors, 4,4-dimethyl sterenes, constitute a major component of the apolar fraction of organic matter. delta(13)C values of the 4,4-dimethyl sterenes indicate that they are derived from phytoplanktonic algae rather than from bacteria. The delta(13)C values of the regular and spiro steroids differ by >2parts per thousand suggesting either backbone arrangement of steroids might have involved isotopic fractionation or that these steroids are derived separately from different biological sources. Published by Elsevier Ltd. C1 Brookhaven Natl Lab, Dept Chem, Upton, NY 11973 USA. Indiana Univ, Biogeochem Lab, Bloomington, IN 47405 USA. Chinese Acad Geol Sci, R&D Ctr Saline Lake & Epithermal Deposits, Beijing 100037, Peoples R China. China Natl Petr Co, Key Lab Petr Geochem, Beijing 100083, Peoples R China. RP Wang, RL (reprint author), Brookhaven Natl Lab, Dept Chem, Bldg 555, Upton, NY 11973 USA. EM rlwang@bnl.gov RI Brassell, SImon/H-4970-2011 NR 34 TC 9 Z9 11 U1 1 U2 5 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0146-6380 J9 ORG GEOCHEM JI Org. Geochem. PY 2004 VL 35 IS 2 BP 157 EP 168 DI 10.1016/j.orggeochem.2003.10.003 PG 12 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 770BK UT WOS:000188703200005 ER PT J AU Milkov, AV Claypool, GE Lee, YJ Torres, ME Borowski, WS Tomaru, H Sassen, R Long, PE AF Milkov, AV Claypool, GE Lee, YJ Torres, ME Borowski, WS Tomaru, H Sassen, R Long, PE CA ODP Leg 204 Sci Party TI Ethane enrichment and propane depletion in subsurface gases indicate gas hydrate occurrence in marine sediments at southern Hydrate Ridge offshore Oregon SO ORGANIC GEOCHEMISTRY LA English DT Article ID GULF-OF-MEXICO; CASCADIA CONVERGENT MARGIN; METHANE HYDRATE; HYDROCARBON GASES; CONTINENTAL-SLOPE; DEPOSITS; ACCUMULATIONS; CONSTRAINTS; PROVINCES; FLUID AB The recognition of finely disseminated gas hydrate in deep marine sediments heavily depends on various indirect techniques because this mineral quickly decomposes upon recovery from in situ pressure a;.,id temperature conditions. Here, we discuss molecular properties of closely spaced gas voids (formed as a result of core recovery) and gas hydrates from an area of relatively low gas flux at the flanks of the southern Hydrate Ridge offshore Oregon (ODP Sites 1244, 1245 and 1247). Within the gas hydrate occurrence zone (GHOZ), the concentration of ethane (C-2) and propane (C-3) in adjacent gas voids shows large variability. Sampled gas hydrates are enriched in C-2 relative to void gases but do not contain C-3. We suggest that the observed variations in the composition of void gases is a result of molecular fractionation during crystallization of structure I gas hydrate that contains C-2 but excludes C-3 from its crystal lattice. This hypothesis is used to identify discrete intervals of finely disseminated gas hydrate in cored sediments. Variations in gas composition help better constrain gas hydrate distribution near the top of the GHOZ along with variations in pore water chemistry and core temperature. Sediments near the base of the gas hydrate stability zone are relatively enriched in C2+ hydrocarbon Eases. Complex and poorly understood geological and geochemical processes in these deeper sediments make the identification of gas hydrate based on molecular properties of void gases more ambiguous. The proposed technique appears to be a useful tool to better understand the distribution of gas hydrate in marine sediments and ultimately the role of gas hydrate in the global carbon cycle. (C) 2004 Elsevier Ltd. All rights reserved. C1 BP Amer, Explorat & Prod Technol Grp, Houston, TX 77079 USA. Korea Inst Geosci & Mineral Resources, Taejon 305350, South Korea. Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA. Eastern Kentucky Univ, Dept Earth Sci, Richmond, KY 40475 USA. Univ Tokyo, Dept Earth & Planetary Sci, Tokyo 1130033, Japan. Texas A&M Univ, Geochem & Environm Res Grp, College Stn, TX 77045 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Milkov, AV (reprint author), BP Amer, Explorat & Prod Technol Grp, 501 Weslake Pk Blvd, Houston, TX 77079 USA. EM alexei.milkov@bp.com RI Long, Philip/F-5728-2013 OI Long, Philip/0000-0003-4152-5682 NR 49 TC 25 Z9 28 U1 0 U2 7 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0146-6380 J9 ORG GEOCHEM JI Org. Geochem. PY 2004 VL 35 IS 9 BP 1067 EP 1080 DI 10.1016/j.orggeochem.2004.04.003 PG 14 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 848VL UT WOS:000223496100007 ER PT S AU Choudhury, B Shinar, R Shinar, J AF Choudhury, B Shinar, R Shinar, J BE Kafafi, ZH Lane, PA TI Luminescent chemical and biological sensors based on the structural integration of an OLED excitation source with a sensing component SO ORGANIC LIGHT-EMITTING MATERIALS AND DEVICES VII SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Organic Light-Emitting Materials and Devices VII CY AUG 04-06, 2003 CL San Diego, CA SP SPIE DE organic light emitting device; OLED; photoluminescence; PL; oxygen sensor; immunosensor ID LIGHT-EMITTING DEVICES; SOL-GEL; TEMPERATURE STABILITY; CARBON-DIOXIDE; EFFICIENCY; COMPLEXES; OXYGEN; EMISSION; AMMONIA AB A new platform for luminescent chemical and biological sensors, integrating the excitation source, an OLED, with the sensing component, is described. The utility of the platform is demonstrated for an oxygen sensor and its potential is demonstrated for antibody-antigen immunoassays. The oxygen sensor is operable in two modes, i.e., photoluminescence (PL) intensity mode and lifetime mode, where changes in the PL intensity and lifetime, respectively, are correlated with the oxygen level. In the lifetime mode, the need for sensor calibration, which remains a challenge in real-world sensing applications, is eliminated. Attributes and issues related to sensor performance, including design and stability, are discussed. C1 US DOE, Ames Lab, Ames, IA 50011 USA. RP Choudhury, B (reprint author), US DOE, Ames Lab, Ames, IA 50011 USA. NR 30 TC 12 Z9 12 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 0-8194-5087-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5214 BP 64 EP 72 DI 10.1117/12.515120 PG 9 WC Materials Science, Multidisciplinary; Optics SC Materials Science; Optics GA BY77G UT WOS:000189459500008 ER PT S AU Wurtz, GA Hranisavljevic, J Wiederrecht, GP AF Wurtz, GA Hranisavljevic, J Wiederrecht, GP CA Nanophotonoics Grp BE Heremans, PL Muccini, M Hofstraat, H TI Observation of coherent optical coupling within inorganic-organic hybrid nanoparticles SO ORGANIC OPTOELECTRONICS AND PHOTONICS SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Organic Optoelectronics and Photonics CY APR 28-30, 2004 CL Strasbourg, FRANCE DE plasmonics; nanoparticles; exciton; hybrid materials; j-aggregates; nanophotonics; ultrafast spectroscopy ID METALLIC NANOPARTICLES; SILVER NANOPARTICLES; EXCITON DYNAMICS; COLLOIDAL SILVER; ENERGY-TRANSPORT; MICROSCOPY; SPECTROSCOPY; FLUORESCENCE; EXCITATION; PARTICLES AB We report on the study of the optical properties of hybrid systems made from molecular aggregates (J-aggregates) and metallic nanoparticles (Au and Ag). Both entities have outstanding optical properties that have been extensively addressed both through experimental and theoretical efforts. The J-aggregates were chosen for their linear and non-linear excitonic response that shows among other intriguing properties, superradiant emission. ultrafast optical switching, and electroluminescence. These J-aggregates form spontaneously on the surface of Au and Ag nanoparticles, used primarily to excite the organic shell through optical near-field interaction. Steady state as well as ultrafast spectroscopic measurements was used to characterize the nature of the interaction between the two constituents as well as to follow the dynamics of the exciton in the aggregate upon near-field excitation from the particle. For both Au and Ag, Mie scattering theory calculations of the hybrid ground state absorption spectra account for the experimental observations and reflect the coherent coupling between the excitonic states in the aggregate and the nanoparticles electronic transition dipoles. Furthermore we show that the dipole-dipole coupling strength between the individual molecules in the aggregate is increased by similar to30% on the surface of the particle compared to its value in solution. The different dynamics of these nanosystems have been probed using femtosecond spectroscopy and reveals contrasted relaxation pathways for the exciton when interacting with Ag with respect to Au as well as a delay dependent excitonic coherent length. C1 Argonne Natl Lab, Div Chem, Nanophoton Grp, Argonne, IL 60439 USA. RP Wurtz, GA (reprint author), Argonne Natl Lab, Div Chem, Nanophoton Grp, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 35 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 0-8194-5387-0 J9 P SOC PHOTO-OPT INS PY 2004 VL 5464 BP 176 EP 185 DI 10.1117/12.545684 PG 10 WC Engineering, Electrical & Electronic; Optics SC Engineering; Optics GA BBA78 UT WOS:000224432800021 ER PT S AU Breeze, AJ Rumbles, G Gregg, BA Ginley, DS AF Breeze, AJ Rumbles, G Gregg, BA Ginley, DS BE Kafafi, ZH Lane, PA TI The effects of processing conditions on polymer photovoltaic device performance SO ORGANIC PHOTOVOLTAICS IV SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Organic Photovoltaics IV CY AUG 07-08, 2003 CL San Diego, CA SP SPIE DE polymer; small molecule organics; heterojunction; organic solar cells; polymer ordering ID FILMS AB The work reported here explores the impact of polymer morphology on the physics and performance of perylene benzimidazole / poly(3-hexylthiophene) bilayer photovoltaic devices. By varying both the annealing temperature and the solvent used for polymer deposition, we demonstrate control of the polymer chain morphology. An increase in the relative ordering of the polymer chain conformation is observed through a shift in the absorption onset and absorption spectral shape, and results in improved photovoltaic performance. C1 NREL, Golden, CO 80401 USA. RP Ginley, DS (reprint author), NREL, 1617 Cole Blvd, Golden, CO 80401 USA. OI Rumbles, Garry/0000-0003-0776-1462 NR 7 TC 1 Z9 1 U1 0 U2 2 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5088-X J9 P SOC PHOTO-OPT INS PY 2004 VL 5215 BP 271 EP 275 DI 10.1117/12.531846 PG 5 WC Electrochemistry; Energy & Fuels; Optics; Polymer Science SC Electrochemistry; Energy & Fuels; Optics; Polymer Science GA BY69Z UT WOS:000189442000031 ER PT S AU Emery, K AF Emery, K BE Kafafi, ZH Lane, PA TI Photovoltaic efficiency measurements SO ORGANIC PHOTOVOLTAICS V SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Organic Photovoltaics V CY AUG 04-06, 2004 CL Denver, CO SP SPIE, Natl Renewable Energy Lab DE terrestrial; solar; spectral; model; photovoltaic ID SOLAR-CELLS; PERFORMANCE; CALIBRATION AB Photovoltaic power conversion efficiency is the single most important performance indicator. This paper gives an overview of procedures to determine the efficiency with respect to standard conditions. The measurement theory and general procedures for determining the efficiency with respect to reference conditions are well understood. The engineering challenge of commercial or custom equipment to perform accurate efficiency measurements for all photovoltaic technologies is discussed. Accurately measuring the performance of multijunction devices requires adjusting the intensity and spectral content of the light source so that each junction generates the proper photocurrent. Organic devices often have time constants on the photocurrent in excess of 1 s. This poses a variety of problems when measuring the quantum efficiency under 1-sun illumination or measuring the current-voltage characteristics. Many photovoltaic cells have reversible and irreversible transients in the current and/or voltage. Module acceptance testing and qualification procedures often assume that these transients are not present. The sample with the highest efficiency may not produce the highest energy because the photovoltaic performance is a function of the spectral content of the light, total irradiance, and temperature-all of which are different in the "real world" than under standard reference conditions. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Emery, K (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. NR 54 TC 8 Z9 8 U1 3 U2 15 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5458-3 J9 P SOC PHOTO-OPT INS PY 2004 VL 5520 BP 36 EP 44 DI 10.1117/12.562712 PG 9 WC Energy & Fuels SC Energy & Fuels GA BBI07 UT WOS:000225597100005 ER PT S AU Myers, DR Gueymard, CA AF Myers, DR Gueymard, CA BE Kafafi, ZH Lane, PA TI Description and availability of the SMARTS spectral model for photovoltaic applications SO ORGANIC PHOTOVOLTAICS V SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Organic Photovoltaics V CY AUG 04-06, 2004 CL Denver, CO SP SPIE, Natl Renewable Energy Lab DE terrestrial; solar; spectral; model; photovoltaic ID IRRADIANCE; TEMPERATURE; DAYLIGHT AB Limited spectral response range of photovoltaic (PV) devices requires device performance be characterized with respect to widely varying terrestrial, solar spectra. The FORTRAN code "Simple Model for Atmospheric Transmission of Sunshine" (SMARTS) was developed for various clear-sky solar renewable energy applications. The model is partly based on parameterizations of transmittance functions in the MODTRAN/LOWTRAN band model family of radiative transfer codes. SMARTS computes spectra with a resolution of 0.5 nanometers (nm) below 400 nm, 1.0 nm from 400 nm to 1700 nm, and 5 nm from 1700 nm to 4000 nm. Fewer than 20 input parameters are required to compute spectral irradiance distributions including spectral direct beam, total, and diffuse hemispherical radiation, and up to 30 other spectral parameters. A spreadsheet-based graphical user interface can be used to simplify the construction of input files for the model. The model is the basis for new terrestrial reference spectra developed by the American Society for Testing and Materials (ASTM) for photovoltaic and materials degradation applications. We describe the model accuracy, functionality, and the availability of source and executable code. Applications to PV rating and efficiency and the combined effects of spectral selectivity and varying atmospheric conditions are briefly discussed. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Myers, DR (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. NR 39 TC 13 Z9 13 U1 0 U2 4 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5458-3 J9 P SOC PHOTO-OPT INS PY 2004 VL 5520 BP 56 EP 67 DI 10.1117/12.555943 PG 12 WC Energy & Fuels SC Energy & Fuels GA BBI07 UT WOS:000225597100007 ER PT S AU Myers, DR Reda, I Wilcox, S Andreas, A AF Myers, DR Reda, I Wilcox, S Andreas, A BE Kafafi, ZH Lane, PA TI Optical radiation measurements for photovoltaic applications: instrumentation uncertainty and performance SO ORGANIC PHOTOVOLTAICS V SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Organic Photovoltaics V CY AUG 04-06, 2004 CL Denver, CO SP SPIE, Natl Renewable Energy Lab DE photovoltaic; performance; instrumentation; solar radiation; uncertainty ID SPECTRAL SOLAR-RADIATION; THERMAL OFFSET; IRRADIANCE; PYRANOMETER; CALIBRATE AB Evaluating the performance of photovoltaic (PV) devices in the laboratory and in the field requires accurate knowledge of the optical radiation stimulating the devices. We briefly describe the radiometric instrumentation used for. characterizing broadband and spectral irradiance for PV applications. Spectral radiometric measurement systems are used to characterize solar simulators (continuous and pulsed, or flash sources) and natural sunlight. Broadband radiometers (pyranometers and pyrheliometers) are used to assess solar resources for renewable applications and develop and validate broadband solar radiation models for estimating system performance. We describe the sources and magnitudes of uncertainty associated with calibrations and measurements using these instruments. The basic calibration and measurement uncertainty associated with this instrumentation are based on the guidelines described in the International Standards Organization (ISO) and Bureau Internationale des Poids et Mesures (BIPM) Guide to Uncertainty in Measurement. The additional contributions to uncertainty arising from the uncertainty in characterization functions and correction schemes are discussed and illustrated. Finally, empirical comparisons of several solar radiometer instrumentation sets illustrate that the best measurement accuracy for broadband radiation is on the order of 3%, and spectrally dependent uncertainty for spectroradiometer systems range from 4% in the visible to 8% to 10% in the ultraviolet and infrared. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Myers, DR (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. NR 24 TC 0 Z9 0 U1 1 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 0-8194-5458-3 J9 P SOC PHOTO-OPT INS PY 2004 VL 5520 BP 142 EP 153 DI 10.1117/12.555947 PG 12 WC Energy & Fuels SC Energy & Fuels GA BBI07 UT WOS:000225597100017 ER PT J AU Muehleman, C Li, J Kuettner, KE Zhong, Z AF Muehleman, C Li, J Kuettner, KE Zhong, Z TI Diffraction enhanced X-ray imaging of musculoskeletal lesions SO OSTEOARTHRITIS AND CARTILAGE LA English DT Meeting Abstract CT 9th World Congress of the Osteoarthritis-Research-Society-International CY DEC 02-05, 2004 CL Chicago, IL SP Osteoarthritis Res Soc Int C1 Rush Univ, Med Ctr, Chicago, IL 60612 USA. Brookhaven Natl Lab, NSLS, Upton, NY 11973 USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU W B SAUNDERS CO LTD PI LONDON PA 32 JAMESTOWN RD, LONDON NW1 7BY, ENGLAND SN 1063-4584 J9 OSTEOARTHR CARTILAGE JI Osteoarthritis Cartilage PY 2004 VL 12 SU B BP S117 EP S117 PG 1 WC Orthopedics; Rheumatology SC Orthopedics; Rheumatology GA 879HY UT WOS:000225708200287 ER PT S AU Leangsuksun, C Liu, T Liu, YD Scott, SL Libby, R Haddad, I AF Leangsuksun, C Liu, T Liu, YD Scott, SL Libby, R Haddad, I BE Cao, J Yang, LT Guo, M Lau, F TI Highly reliable linux HPC clusters: Self-awareness approach SO PARALLEL AND DISTRIBUTED PROCESSING AND APPLICATIONS, PROCEEDINGS SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT 2nd International Symposium on Parallel and Distributed Processing and Applications CY DEC 13-15, 2004 CL Hong Kong, PEOPLES R CHINA SP IEEE HK Chapter, Assoc Comp Machinery, HK Chapter, Informat Proc Soc Japan, Springer AB Current solutions for fault-tolerance in HPC systems focus on dealing with the result of a failure. However, most are unable to handle runtime system configuration changes caused by transient failures and require a complete restart of the entire machine. The recently released HA-OSCAR soft-ware stack is one such effort making inroads here. This paper discusses detailed solutions for the high-availability and serviceability enhancement of clusters by HAOSCAR via multi-head-node failover and a service level fault tolerance mechanism. Our solution employs self-configuration and introduces Adaptive Self Healing (ASH) techniques. HA-OSCAR availability improvement analysis was also conducted with various sensitivity factors. Finally, the paper also entails the details of the system layering strategy, dependability modeling. and analysis of an actual experimental system by a Petri net-based model. Stochastic Reword Net (SRN). C1 Louisiana Tech Univ, Dept Comp Sci, Ruston, LA 71270 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. Intel Corp, Santa Clara, CA 95051 USA. RP Leangsuksun, C (reprint author), Louisiana Tech Univ, Dept Comp Sci, Ruston, LA 71270 USA. EM box@latech.edu; Tong_Liu@dell.com; yli010@latech.edu; scotts_l@ornl.aov; rml@hpc.intel.com; ibrahim.haddad@ericsson.com NR 10 TC 2 Z9 2 U1 0 U2 1 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-24128-0 J9 LECT NOTES COMPUT SC PY 2004 VL 3358 BP 217 EP 222 PG 6 WC Computer Science, Theory & Methods SC Computer Science GA BBM37 UT WOS:000226159800024 ER PT B AU Lipnikov, K Vassilevski, Y AF Lipnikov, K Vassilevski, Y BE Chetverushkin, B Ecer, A Satofuka, N Periaux, J Fox, P TI Parallel adaptive solution of the Stokes and Oseen problems on unstructured 3D meshes SO PARALLEL COMPUTATIONAL FLUID DYNAMICS: ADVANCED NUMERICAL METHODS SOFTWARE AND APPLICATIONS LA English DT Proceedings Paper CT Parallel Computational Fluid Dynamics Conference CY MAY 13-15, 2003 CL Moscow, RUSSIA SP Russian Acad Sci, Inst Math Modelling, Supercomp Ctr Russia, Russian Acad Sci, Russian Fdn Basic Res, Russian Federat, Minist Ind, Sci & Technol, Russian Federat, Minist Atom Energy, HEWLETT-PACKARD, IBM, INTEL AB A new method of a parallel adaptive solution of the Stokes and Oseen problems is proposed. It constists of a parallel adaptive mesh generator and a parallel iterative solver with block-diagonal preconditioners. The preconditioners for the three velocity blocks are based on a domain decomposition method with a black box subdomain solver and a smoother in a space of aggregated vectors. The fourth block is a preconditioner for the pressure Schur complement. Efficiency of the method is demonstrated with numerical experiments. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Lipnikov, K (reprint author), Los Alamos Natl Lab, MS B284, Los Alamos, NM 87545 USA. RI Vassilevski, Yuri/A-6068-2016 NR 9 TC 1 Z9 1 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS BN 0-444-51612-3 PY 2004 BP 153 EP 161 DI 10.1016/B978-044451612-1/50020-2 PG 9 WC Computer Science, Interdisciplinary Applications; Computer Science, Theory & Methods; Mechanics; Physics, Multidisciplinary SC Computer Science; Mechanics; Physics GA BAP33 UT WOS:000223114400019 ER PT B AU Feng, W AF Feng, W BE Joubert, G Nagel, WE Peters, FJ Walter, WV TI Green Destiny plus mpiBLAST = Bioinfomagic SO PARALLEL COMPUTING: SOFTWARE TECHNOLOGY, ALGORITHMS, ARCHITECTURES AND APPLICATIONS SE ADVANCES IN PARALLEL COMPUTING LA English DT Proceedings Paper CT International Conference on Parallel Computing (ParCo2003) CY SEP 02-05, 2003 CL Tech Univ Dresden, Ctr High Performance Comp, Dresden, GERMANY SP AMD GmbH, Cray Comp Deutschland GmbH, Hewlett Packard GmbH, Geschaftsstelle Berlin, IBM Deutschland GmbH, Fachb Lehre Forsch, Megware Comp GmbH, NEC High Performance Comp Europe GmbH, Pallas GmbH, Silicon Graph GmbH, SUN Microsyst GmbH HO Tech Univ Dresden, Ctr High Performance Comp ID LOCAL BLAST SERVICE; WORKSTATION CLUSTERS; PARALLELIZATION C1 Los Alamos Natl Lab, Res & Dev Adv Network Technol, RADIANT, Los Alamos, NM 87545 USA. RP Feng, W (reprint author), Los Alamos Natl Lab, Res & Dev Adv Network Technol, RADIANT, POB 1663,MS D451, Los Alamos, NM 87545 USA. NR 19 TC 2 Z9 2 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS BN 0-444-51689-1 J9 ADV PAR COM PY 2004 VL 13 BP 653 EP 660 PG 8 WC Computer Science, Theory & Methods SC Computer Science GA BBM01 UT WOS:000226096700078 ER PT S AU de Vega, FF Cantu-Paz, E Lopez, JI Manzano, T AF de Vega, FF Cantu-Paz, E Lopez, JI Manzano, T BE Yao, X Burke, E Lozano, JA Smith, J MereloGuervos, JJ Bullinaria, JA Rowe, J Tino, P Kaban, A Schwefel, HP TI Saving resources with plagues in genetic algorithms SO PARALLEL PROBLEM SOLVING FROM NATURE - PPSN VIII SE Lecture Notes in Computer Science LA English DT Article; Proceedings Paper CT 8th International Conference on Parallel Problem Solving from Nature (PPSN VIII) CY SEP 18-22, 2004 CL Univ Birmingham, Sch Comp Sci, Birmingham, ENGLAND SP CERCIA, Honda Res Inst Europe, Thales Res & Technol, HP Labs Bristol HO Univ Birmingham, Sch Comp Sci ID POPULATION-SIZE AB The population size of genetic algorithms (GAs) affects the quality of the solutions and the time required to find them. While progress has been made in estimating the population sizes required to reach a desired solution quality for certain problems, in practice the sizing of populations is still usually performed by trial and error. These trials might lead to find a population that is large enough to reach a satisfactory solution, but there may still be opportunities to optimize the computational cost by reducing the size of the population. This paper presents a technique called plague that periodically removes a number of individuals from the population as the CA executes. Recently, the usefulness of the plague has been demonstrated for genetic programming. The objective of this paper is to extend the study of plagues to genetic algorithms. We experiment with deceptive trap functions, a tunable difficult problem for GAs, and the experiments show that plagues can save computational time while maintaining solution quality and reliability. C1 Univ Extremadura, Ctr Univ Merida, Artificial Evolut Grp, E-06071 Badajoz, Spain. Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA USA. RP Univ Extremadura, Ctr Univ Merida, Artificial Evolut Grp, E-06071 Badajoz, Spain. EM fcofdez@unex.es NR 19 TC 3 Z9 3 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-23092-0 J9 LECT NOTES COMPUT SC PY 2004 VL 3242 BP 272 EP 281 PG 10 WC Computer Science, Theory & Methods SC Computer Science GA BAX55 UT WOS:000224103300028 ER PT S AU Langston, M AF Langston, M BE Downey, R Fellows, M Dehne, F TI Practical FPT implementations and applications SO PARAMETERIZED AND EXACT COMPUTATION, PROCEEDINGS SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT 1st International Conference on Parameterized and Exact Computation (IWPEC 2004) CY SEP 14-17, 2004 CL Bergen, NORWAY C1 Univ Tennessee, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN USA. RP Langston, M (reprint author), Univ Tennessee, Knoxville, TN 37996 USA. RI Langston, Michael/A-9484-2011 NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-23071-8 J9 LECT NOTES COMPUT SC PY 2004 VL 3162 BP 291 EP 291 PG 1 WC Computer Science, Theory & Methods SC Computer Science GA BAW88 UT WOS:000223981800026 ER PT B AU Baker, MD AF Baker, MD BE Astbury, A Campbell, BA Khanna, FC Vincter, MG TI Exploring QCD with heavy ion collisions SO PARTICLES AND THE UNIVERSE LA English DT Proceedings Paper CT 18th Annual Lake Louise Winter Institute CY FEB 16-22, 2003 CL Lake Louise, CANADA ID CHARGED-PARTICLE MULTIPLICITY; QUARK-GLUON PLASMA; PLUS AU COLLISIONS; CENTRALITY DEPENDENCE; NUCLEAR COLLISIONS; ROOT-S(NN)=130 GEV; ELLIPTIC FLOW AB After decades of painstaking research, the field of heavy ion physics has reached an exciting new era. Evidence is mounting that we can create a high temperature, high density, strongly interacting "bulk matter" state in the laboratory-perhaps even a quark-gluon plasma. This strongly interacting matter is likely to provide qualitative new information about the fundamental strong interaction, described by Quantum Chromodynamics (QCD). These lectures provide a summary of experimental heavy ion research, with particular emphasis on recent results from RHIC (Relativistic Heavy Ion Collider) at Brookhaven National Laboratory. In addition, we will discuss what has been learned so far and the outstanding puzzles. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Brookhaven Natl Lab, Bldg 555A,POB 5000, Upton, NY 11973 USA. EM Mark.Baker@bnl.gov NR 65 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 981-238-810-9 PY 2004 BP 1 EP 30 DI 10.1142/9789812702777_0001 PG 30 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BCL50 UT WOS:000229856000001 ER PT B AU Anikeev, K AF Anikeev, K BE Astbury, A Campbell, BA Khanna, FC Vincter, MG TI B physics at CDF SO PARTICLES AND THE UNIVERSE LA English DT Proceedings Paper CT 18th Annual Lake Louise Winter Institute CY FEB 16-22, 2003 CL Lake Louise, CANADA AB B physics is at the core of the CDF agenda for Run II. With the Tevatron performance gradually improving, samples of data corresponding to about 70 pb(-1) are now available. Due to improved detector capabilities these data already allow one to improve a number of Run I results, as well as perform a series of new measurements. We present an overview of the current state of B physics at CDF. C1 MIT, Fermilab, CDF, Batavia, IL 60510 USA. RP MIT, Fermilab, CDF, MS 318, Batavia, IL 60510 USA. EM anikeev@fnal.gov NR 4 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 981-238-810-9 PY 2004 BP 168 EP 174 DI 10.1142/9789812702777_0007 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BCL50 UT WOS:000229856000007 ER PT B AU Costanzo, D AF Costanzo, D BE Astbury, A Campbell, BA Khanna, FC Vincter, MG TI Susy searches and measurements with the atlas experiment at the large hadron collider SO PARTICLES AND THE UNIVERSE LA English DT Proceedings Paper CT 18th Annual Lake Louise Winter Institute CY FEB 16-22, 2003 CL Lake Louise, CANADA AB The large center of mass energy and luminosity provided by the Large Hadron Collider will offer a unique opportunity to discover new particles in the TeV range. The potential to discover and measure supersymmetric particles with the ATLAS detector is discussed based on SUGRA and gauge mediated supersymmetry breaking models. The ATLAS discovery potential extends up to squark and gluino masses of about 2.5 TeV. Precise measurements of sparticle masses can also be performed, and the fundamental parameters of the theory can be constrained to 10 % or better in many cases. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM DCostanzo@lbl.gov NR 10 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 981-238-810-9 PY 2004 BP 199 EP 204 DI 10.1142/9789812702777_0012 PG 6 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BCL50 UT WOS:000229856000012 ER PT J AU Chang, FC Fessler, RR Merkle, BD Borton, JM Goldberger, WM AF Chang, FC Fessler, RR Merkle, BD Borton, JM Goldberger, WM TI Modeling temperature in coupled electrical and thermal simulations of the Electroconsolidation (R) process SO PARTICULATE SCIENCE AND TECHNOLOGY LA English DT Article DE electroconsolidation; resistivity-heat module; density module; heat-flow module; preform; densification; modeling AB Electroconsolidation(R) is a process for densifying complex-shaped parts by using electrically conductive particulate solids as a pressure-transmitting medium. The part is immersed in a bed of the particulate medium contained in a die chamber. Sintering temperature is achieved by resistive heating of the medium while applying compaction pressure. The process is capable of ultrahigh temperatures and short cycle times and offers the potential for low processing costs. Control of the process and selection of process conditions require knowledge of the temperatures within the die. Temperature gradients exist because of the high heating rate and because of variations of density and electrical resistivity of the medium due to the presence of the part. Direct measurement of temperature with thermocouples or other conventional means is impractical because of the high temperatures, high currents, and high pressures that are involved. Therefore, a computer model it-as developed to predict temperature as a function of time and applied voltage for any location in the die. The computer model is composed of three parts: a geometrical model to approximate the density and resistivity variations in the medium, a finite-element model to calculate the rate of resistive heating within each element, and a finite-difference model to calculate the temperature distribution based on solution of the heat-transfer equations. Predicted temperatures have been shown to be in excellent agreement with measurements, and numerical simulation provided encouraging a consistency and reasonably accurate predictions of temperature Profiles within the die. The model demonstrated the,feasibility of a new process to achieve simultaneous application of pressure and heat to powder densification in Electroconsolidation. C1 Argonne Natl Lab, Div Energy Technol, Argonne, IL 60439 USA. Biztek Consulting Inc, Evanston, IL USA. Super Graphite Co, Chicago, IL USA. RP Chang, FC (reprint author), Argonne Natl Lab, Div Energy Technol, 9700 S Cass Ave, Argonne, IL 60439 USA. EM chang@anl.gov NR 8 TC 3 Z9 3 U1 0 U2 2 PU TAYLOR & FRANCIS INC PI PHILADELPHIA PA 325 CHESTNUT ST, SUITE 800, PHILADELPHIA, PA 19106 USA SN 0272-6351 J9 PARTICUL SCI TECHNOL JI Part. Sci. Technol. PD JAN-MAR PY 2004 VL 22 IS 1 BP 35 EP 50 DI 10.1080/0272350490422419 PG 16 WC Engineering, Chemical SC Engineering GA 813SJ UT WOS:000220926500003 ER PT S AU Logg, C Navratil, J Cottrell, L AF Logg, C Navratil, J Cottrell, L BE Barakat, C Pratt, I TI Correlating Internet performance changes and route changes to assist in trouble-shooting from an end-user perspective SO PASSIVE AND ACTIVE NETWORK MEASUREMENT SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT 5th International Workshop on Passive and Active Network Measurement CY APR 19-20, 2004 CL Univ Cambridge, Juan les Pins, FRANCE SP INRIA Sophia Antipolis, Intel, Cisco Syst HO Univ Cambridge AB With the growth of world wide data intensive scientific collaborations, there is a need to transfer large amounts of data to and from data repositories around the world. To effectively enable such transfers, high speed, predictable networks are needed. In turn, these require performance monitoring to ensure their quality. One tool/infrastructure that has been successfully used for the analysis and monitoring of critical paths is IEPM-BW [1]. Based on experience gained from the achievable throughput monitoring in IEPM-BW, we developed AbwE [2], a tool to enable quick (< I second), low impact (40 packets) measurements of available bandwidth. Using ABwE we have been able to quickly detect significant changes in available bandwidth on production links up to IGbps, and report this information to the appropriate Network Operations Centers (NOCs) for repair, as such changes are often associated with route changes. This paper discusses this set of tools and their effectiveness together with examples of their utilization. C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RP Logg, C (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. EM cal@slac.stanford.edu; jiri@slac.stanford.edu; Cottrell@slac.stanford.edu NR 2 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-21492-5 J9 LECT NOTES COMPUT SC PY 2004 VL 3015 BP 289 EP 297 PG 9 WC Computer Science, Information Systems; Computer Science, Theory & Methods SC Computer Science GA BY96B UT WOS:000189505100029 ER PT B AU Vazhkudai, S AF Vazhkudai, S BE Arabnia, HR TI On-demand grid storage using scavenging SO PDPTA '04: PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON PARALLEL AND DISTRIBUTED PROCESSING TECHNIQUES AND APPLICATIONS, VOLS 1-3 LA English DT Proceedings Paper CT International Conference on Parallel and Distributed Processing Techniques and Applications CY JUN 21-24, 2004 CL Las Vegas, NV SP Comp Sci Res, Educ & Applicat Press, Int Technol Inst, Korean Soc Internet Informat, World Acad Sci Informat Technol DE grid storage; serverless filesystems; scavenging AB Increasingly scientific discoveries are driven by analyses of massively distributed bulk data. This has led to the proliferation of high-end mass storage systems, storage area clusters and data centers as storage fabric elements for the Grid, offering excellent price/performance ratio and good storage speeds, but increasing maintenance and administrative costs. A promising alternative then, is to harness the collective storage potential of individual workstations much as we harness the idle CPU cycles due to the affordable economics in aggregating commodity storage and low usage to available space ratio. However, such aggregated commodity storage is prone to volatility, machine failures, performance concerns and trust issues. In this paper, we address several of the aforementioned issues and present our design on the construction of scalable aggregated commodity storage through scavenging; providing availability through aggressive replication; revering user autonomy and his authority to reclaim space; and enabling Grid access to such storage. C1 Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN USA. RP Vazhkudai, S (reprint author), Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN USA. EM vazhkudaiss@ornl.gov NR 32 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 1-932415-26-2 PY 2004 BP 554 EP 560 PG 7 WC Computer Science, Theory & Methods SC Computer Science GA BBJ53 UT WOS:000225819600085 ER PT S AU Forman, L Vanier, PE Welsh, KE AF Forman, L Vanier, PE Welsh, KE BE Doty, FP Schirato, RC Barber, HB Roehrig, H TI Distinguishing spontaneous fission neutrons from cosmic-ray background SO PENETRATING RADIATION SYSTEMS AND APPLICATIONS VI SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Penetrating Radiation Systems and Applications VI CY AUG 04-05, 2004 CL Denver, CO SP SPIE DE fast neutron; time-of-flight; neutron spectra; cosmic-ray ID OF-FLIGHT SPECTROMETER AB We have measured the neutron spectra of cosmic-rays and a spontaneous fission emitting source (Cf-252) using a neutron double scatter spectrometer. The energy range of measurements was 0.1-10 MeV where the spectrometer efficiency is determined to be up to 8.7%, depending on the separation between detection planes. Our cosmic-ray neutron spectrum measurement is in good agreement with the sea-level data reported by Goldhagen and his co-workers. In the energy range 0.1-1.0 MeV, the cosmic-ray and Cf-252 spectra are different and separable. This difference is expected from the applicable models that describe the phenomena, 'equilibrium slowing down' (cosmic-rays) and 'Maxwellian kinetic temperature' emission (spontaneous fission). We show that >80% of Cf-252 neutrons and <25% of cosmic-ray related neutrons are emitted in this energy range of measurement, and conclude that neutron spectroscopy provides effective ways to distinguish a fission source from the cosmic-ray background. C1 Brookhaven Natl Lab, Upton, NY 11976 USA. RP Forman, L (reprint author), Brookhaven Natl Lab, Upton, NY 11976 USA. NR 7 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 0-8194-5479-6 J9 P SOC PHOTO-OPT INS PY 2004 VL 5541 BP 27 EP 36 DI 10.1117/12.559603 PG 10 WC Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA BBH71 UT WOS:000225568800004 ER PT S AU Antolak, AJ Lucadamo, GA AF Antolak, AJ Lucadamo, GA BE Doty, FP Schirato, RC Barber, HB Roehrig, H TI Nanoscale TEM tomography of metal oxide photocatalyst systems SO PENETRATING RADIATION SYSTEMS AND APPLICATIONS VI SE Proceedings of SPIE LA English DT Proceedings Paper CT Conference on Penetrating Radiation Systems and Applications VI CY AUG 04-05, 2004 CL Denver, CO SP SPIE DE TEM; tomography; reconstruction; nanoscale; electron microscopy; photocatalyst; titania AB Transmission electron microscope (TEM) tomography provides three-dimensional structural information from tilt series with nanoscale resolution. We have collected TEM projection data sets to study the internal structure of photocatalytic nanoparticles. Multiple cross-sectional slices of the nanoparticles are reconstructed using an algebraic reconstruction technique (ART) and then assembled to form a 3D rendering of the object. We recently upgraded our TEM with a new sample holder having a tilt range of +/-70degrees and have collected tomography data over a range of 125degrees. Simulations were performed to study the effects of field-of-view displacement (shift and rotation), limited tilt angle range, hollow (missing) projections, stage angle accuracy, and number of projections on the reconstructed image quality. This paper discusses our experimental and computational approaches, presents some examples of TEM tomography, and considers future directions. C1 Sandia Natl Labs, Livermore, CA 94550 USA. RP Antolak, AJ (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA. NR 5 TC 1 Z9 1 U1 1 U2 2 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5479-6 J9 PROC SPIE PY 2004 VL 5541 BP 67 EP 74 DI 10.1117/12.565694 PG 8 WC Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA BBH71 UT WOS:000225568800008 ER PT B AU Camarero, JA Hackel, BJ de Yoreo, JJ Mitchell, AR AF Camarero, Julio A. Hackel, Benjamin J. de Yoreo, James J. Mitchell, Alexander R. BE Chorev, M Sawyer, TK TI A new method for the preparation of peptide C-terminal alpha-thioesters compatible with Fmoc-solid-phase peptide synthesis SO Peptide Revolution: Genomics, Proteomics & Therapeutics LA English DT Proceedings Paper CT 18th American Peptide Symposium CY JUL 19-23, 2003 CL BOSTON, MA ID NATIVE CHEMICAL LIGATION; OXIDATION C1 Lawrence Livermore Natl Lab, Chem Biol & Nucl Sci Div, Livermore, CA 94550 USA. RP Camarero, JA (reprint author), Lawrence Livermore Natl Lab, Chem Biol & Nucl Sci Div, Livermore, CA 94550 USA. RI Camarero, Julio/A-9628-2015 NR 12 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA BN 0-9715560-1-6 PY 2004 BP 111 EP 112 PG 2 WC Biochemistry & Molecular Biology; Chemistry, Medicinal SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy GA BEQ46 UT WOS:000238911100048 ER PT B AU Camarero, JA de Yoreo, JJ Fushman, D AF Camarero, Julio A. de Yoreo, James J. Fushman, David BE Chorev, M Sawyer, TK TI Using NMR and segmental isotopic labeling to elucidate the role of the N-terminal region of sigma(70)-like factors in regulating binding of bacterial RNA polymerase to DNA promoter SO Peptide Revolution: Genomics, Proteomics & Therapeutics LA English DT Proceedings Paper CT 18th American Peptide Symposium CY JUL 19-23, 2003 CL BOSTON, MA ID TRANSCRIPTION INITIATION; STRUCTURAL BASIS; HOLOENZYME C1 Lawrence Livermore Natl Lab, Chem Biol & Nucl Sci Div, Livermore, CA 94550 USA. RP Camarero, JA (reprint author), Lawrence Livermore Natl Lab, Chem Biol & Nucl Sci Div, Livermore, CA 94550 USA. RI Camarero, Julio/A-9628-2015 NR 5 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA BN 0-9715560-1-6 PY 2004 BP 248 EP 249 PG 2 WC Biochemistry & Molecular Biology; Chemistry, Medicinal SC Biochemistry & Molecular Biology; Pharmacology & Pharmacy GA BEQ46 UT WOS:000238911100107 ER PT B AU Kerbyson, DJ Hoisie, A Pautz, SD AF Kerbyson, DJ Hoisie, A Pautz, SD BE Getov, V Gerndt, M Hoisie, A Malony, A Miller, B TI Performance modeling of deterministic transport computations SO PERFORMANCE ANALYSIS AND GRID COMPUTING LA English DT Proceedings Paper CT Workshop on Performance Analysis and Distributed Computing CY AUG 19-23, 2002 CL DAGSTUHL, GERMANY DE performance evaluation; performance modeling; unstructured meshes; large-scale systems ID PARALLEL; SYSTEMS AB In this work we present a performance model that encompasses the key characteristics of a Sn transport application using unstructured meshes. Sn transport is an important part of the ASCI workload. This builds on previous analysis which has been done for the case of structured meshes. The performance modeling of an unstructured grid application presents a number of complexities and subtleties that do not arise for structured grids. The resulting analytical model is parametric using basic system performance characteristics (latency, bandwidth, MFLOPS rate etc), and application characteristics (mesh size etc). It is validated on a large HP AlphaServer system showing high accuracy. The model compares favorably to a trace based modeling approach which is specific to a single mesh/processor mapping situation. The model is used to give insight into the achievable performance on possible future processing systems containing thousands of processors. C1 Los Alamos Natl Lab, Performance & Architecture Lab, Los Alamos, NM 87544 USA. RP Kerbyson, DJ (reprint author), Los Alamos Natl Lab, Performance & Architecture Lab, CCS-3, Los Alamos, NM 87544 USA. NR 14 TC 1 Z9 1 U1 1 U2 1 PU SPRINGER PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 1-4020-7693-2 PY 2004 BP 21 EP 39 PG 19 WC Computer Science, Theory & Methods SC Computer Science GA BY45M UT WOS:000189300000002 ER PT B AU Prabhakar, A Getov, V AF Prabhakar, A Getov, V BE Getov, V Gerndt, M Hoisie, A Malony, A Miller, B TI Performance evaluation of hybrid parallel programming paradigms SO PERFORMANCE ANALYSIS AND GRID COMPUTING LA English DT Proceedings Paper CT Workshop on Performance Analysis and Distributed Computing CY AUG 19-23, 2002 CL DAGSTUHL, GERMANY DE performance evaluation; hybrid programming paradigms; parallel programming; clusters of SMPs; collective operations AB With the trend in the supercomputing world shifting from homogeneous machine architectures to hybrid clusters of SMP nodes, the interoperability of OpenMP and MPI has become a key issue in understanding and optimizing the overall system performance. While the low-level performance of MPI and OpenMP can be evaluated using existing benchmarks, the combination of the two poses new challenges. Therefore, a performance study of different hybrid programming paradigms is of high benefit for both the vendors and the user community. As part of our project, we have identified several possible combinations of the two models in order to provide qualitative and quantitative justification of situations in which any one of them is to be favoured. Collective operations are particularly important to analyze and evaluate on a hybrid platform and therefore we concentrate our study on three of them-barrier, all-to-all, and all-reduce. Issues like the optimal mix of OpenMP and MPI, the most efficient way of managing MPI communication from within OpenMP, the optimal unit of communication, and the degree of overlap between computation and communication need to be evaluated. The performance results supporting this investigation were taken on the IBM Power-3 machine at San Diego Supecomputer Center using our suite of hybrid microbench marks. C1 LANL, Performance & Architecture Lab, Los Alamos, NM USA. RP Prabhakar, A (reprint author), LANL, Performance & Architecture Lab, CCS-3, Los Alamos, NM USA. NR 11 TC 1 Z9 1 U1 1 U2 1 PU SPRINGER PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS BN 1-4020-7693-2 PY 2004 BP 57 EP 76 PG 20 WC Computer Science, Theory & Methods SC Computer Science GA BY45M UT WOS:000189300000004 ER PT S AU Mueller, S Tsang, RP Ghosal, D AF Mueller, S Tsang, RP Ghosal, D BE Calzarossa, MC Gelenbe, E TI Multipath routing in mobile ad hoc networks: Issues and challenges SO PERFORMANCE TOOLS AND APPLICATIONS TO NETWORKED SYSTEMS SE Lecture Notes in Computer Science LA English DT Article; Proceedings Paper CT 11th IEEE/ACM International Symposium on Modeling, Analysis and Simulation of Computer Telecommunications Systems (MASCOTS 2003) CY OCT 12-15, 2003 CL ORLANDO, FL SP IEEE, ACM AB Mobile ad hoc networks (MANETs) consist of a collection of wireless mobile nodes which dynamically exchange data among themselves without the reliance on a fixed base station or a wired backbone network. MANET nodes are typically distinguished by their limited power, processing, and memory resources as well as high degree of mobility. In such networks, the wireless mobile nodes may dynamically enter the network as well as leave the network. Due to the limited transmission range of wireless network nodes, multiple hops are usually needed for a node to exchange information with any other node in the network. Thus routing is a crucial issue to the design of a MANET. In this paper, we specifically examine the issues of multipath routing in MANETs. Multipath routing allows the establishment of multiple paths between a single source and single destination node. It is typically proposed in order to increase the reliability of data transmission (i.e., fault tolerance) or to provide load balancing. Load balancing is of especial importance in MANETs because of the limited bandwidth between the nodes. We also discuss the application of multipath routing to support application constraints such as reliability, load-balancing, energy-conservation, and Quality-of-Service (QoS). C1 Univ Calif Davis, Dept Comp Sci, Davis, CA 95616 USA. Sandia Natl Labs, Livermore, CA 94551 USA. RP Univ Calif Davis, Dept Comp Sci, Davis, CA 95616 USA. NR 29 TC 142 Z9 146 U1 0 U2 3 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-21945-5 J9 LECT NOTES COMPUT SC PY 2004 VL 2965 BP 209 EP 234 PG 26 WC Computer Science, Information Systems; Computer Science, Theory & Methods; Telecommunications SC Computer Science; Telecommunications GA BAC48 UT WOS:000221536500010 ER PT S AU Leyh, GE AF Leyh, GE GP ieee TI Prototype development progress toward a 500 kV solid state Marx modulator SO PESC 04: 2004 IEEE 35TH ANNUAL POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-6, CONFERENCE PROCEEDINGS SE IEEE POWER ELECTRONICS SPECIALISTS CONFERENCE RECORDS LA English DT Proceedings Paper CT 35th Annual IEEE Power Electronics Specialists Conference (PESC 04) CY JUN 20-25, 2004 CL Aachen, GERMANY SP IEEE Power Elect Soc, IEEE Joint IAS, PELS IES German Chapter, Yaskawa, Mitsubishi Elect, GE AB Recent advances in IGBT and SiC technology have made possible a range of solid-state modulator concepts that were unthinkable a decade ago. Power densities and speeds of pulsed-power circuits have increased dramatically due to the commercial introduction of fast, multi-kilovolt IGBT silicon and SiC diodes featured in PCB-style packages. A solid-state modulator concept that stands to benefit considerably from recent IGBT and SiC breakthroughs is the Marx configuration--where an array of stacked modules generates high-voltage output pulses directly from a low voltage DC supply. The Marx scheme avoids the large, inefficient and costly magnetic cores inherent in standard modulator designs, resulting in a considerably simpler, cheaper and more compact mechanical solution. The main disadvantage to this approach is that the individual cells in a Marx bank must float at high voltages during the pulse, complicating the distribution of power and timing signals. This paper examines in closer detail the practical advantages and pitfalls of a solid-state Marx configuration, and explores a design approach with emphasis on performance, wall-plug efficiency, cost of manufacture, availability and ease of service. The paper presents electrical diagrams, mechanical CAD layout and preliminary prototype test data. C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA USA. RP Leyh, GE (reprint author), Stanford Linear Accelerator Ctr, Menlo Pk, CA 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 SN 0275-9306 BN 0-7803-8399-0 J9 IEEE POWER ELECTRON PY 2004 BP 831 EP 834 DI 10.1109/PESC.2004.1355857 PG 4 WC Engineering, Electrical & Electronic SC Engineering GA BBB78 UT WOS:000224587600135 ER PT S AU Ozpineci, B Tolbert, LM Chiasson, JN AF Ozpineci, B Tolbert, LM Chiasson, JN GP ieee TI Harmonic optimization of multilevel converters using genetic algorithms SO PESC 04: 2004 IEEE 35TH ANNUAL POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-6, CONFERENCE PROCEEDINGS SE IEEE POWER ELECTRONICS SPECIALISTS CONFERENCE RECORDS LA English DT Proceedings Paper CT 35th Annual IEEE Power Electronics Specialists Conference (PESC 04) CY JUN 20-25, 2004 CL Aachen, GERMANY SP IEEE Power Elect Soc, IEEE Joint IAS, PELS IES German Chapter, Yaskawa, Mitsubishi Elect, GE AB In this paper, a genetic algorithm (GA) optimization technique is applied to multilevel inverter to determine optimum switching angles for cascaded multilevel inverters for eliminating some higher order harmonics while maintaining the required fundamental voltage. This technique can be applied to multilevel inverters with any number of levels; as an example in this paper, a 7-level inverter is considered, and the optimum switching angles are calculated offline to eliminate the 5th and the 7th harmonics. Then, these angles are used in an experimental setup to validate the results. C1 Oak Ridge Natl Lab, Knoxville, TN USA. RP Ozpineci, B (reprint author), Oak Ridge Natl Lab, Knoxville, TN USA. OI Ozpineci, Burak/0000-0002-1672-3348 NR 9 TC 24 Z9 25 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0275-9306 BN 0-7803-8399-0 J9 IEEE POWER ELECTRON PY 2004 BP 3911 EP 3916 DI 10.1109/PESC.2004.1355167 PG 6 WC Engineering, Electrical & Electronic SC Engineering GA BBB78 UT WOS:000224587600645 ER PT S AU Ozpineci, B Tolbert, LM Du, Z AF Ozpineci, B Tolbert, LM Du, Z GP ieee TI Optimum fuel cell utilization with multilevel inverters SO PESC 04: 2004 IEEE 35TH ANNUAL POWER ELECTRONICS SPECIALISTS CONFERENCE, VOLS 1-6, CONFERENCE PROCEEDINGS SE IEEE POWER ELECTRONICS SPECIALISTS CONFERENCE RECORDS LA English DT Proceedings Paper CT 35th Annual IEEE Power Electronics Specialists Conference (PESC 04) CY JUN 20-25, 2004 CL Aachen, GERMANY SP IEEE Power Elect Soc, IEEE Joint IAS, PELS IES German Chapter, Yaskawa, Mitsubishi Elect, GE AB Static characteristics of fuel cells show More than a 30% difference in the output voltage between no-load to full-load conditions. This inevitable decrease, which is caused by internal losses, reduces the utilization factor of the fuel cells at low loads. Additionally, the converters fed by these fuel cells have to be derated to accommodate higher input voltages at low currents. To increase the utilization of fuel cells and to avoid derating of semiconductors, this paper proposes a level reduction control using a multilevel inverter. Level reduction is done by inhibiting a certain number of fuel cells when the load current decreases. The inhibited fuel cells can be used in other applications such as charging batteries to further increase their utilization and the efficiency of the system. C1 Oak Ridge Natl Lab, Knoxville, TN USA. RP Oak Ridge Natl Lab, Knoxville, TN USA. EM burak@ieee.org; tolbert@utk.edu; zdu1@utk.edu OI Ozpineci, Burak/0000-0002-1672-3348; Tolbert, Leon/0000-0002-7285-609X NR 19 TC 7 Z9 7 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0275-9306 BN 0-7803-8399-0 J9 IEEE POWER ELECTRON PY 2004 BP 4798 EP 4802 DI 10.1109/PESC.2004.1354847 PG 5 WC Engineering, Electrical & Electronic SC Engineering GA BBB78 UT WOS:000224587600783 ER PT J AU Kreth, M Entel, P Kadau, K Meyer, R AF Kreth, M Entel, P Kadau, K Meyer, R TI Molecular-dynamics study of the local symmetry changes in metallic liquids SO PHASE TRANSITIONS LA English DT Article; Proceedings Paper CT International Symposium on Structure and Dynamics of Heterogeneous Systems CY NOV 28-29, 2002 CL UNIV DUISBURG, DUISBURG, GERMANY HO UNIV DUISBURG DE local symmetries in metallic melts; undercooled aluminum; molecular dynamics simulations ID BOND-ORIENTATIONAL ORDER; EMBEDDED-ATOM METHOD; ENERGY CALCULATIONS; SIMULATIONS; PARTICLES; ALLOYS; LEAD; TRANSITION; DIFFUSION; ALUMINUM AB It has been conjectured that the local structure of simple monoatomic liquids is mainly of five-fold symmetry. Experimental evidence for such icosahedral building blocks has recently been found in liquid droplets of lead adjacent to a silicon wall and in deeply undercooled melts of metallic elements like bcc iron, fcc nickel and bcc zirconium. We have used molecular dynamics in order to investigate supercooling effects in the melt of another element (aluminum) on the basis of a common neighbour analysis. In the simulation, we have employed an embedded atom method potential optimized with the help of ab initio calculations for aluminum. The simulations confirm the recent experimental results that, independent of the system, the icosahedral short-range order strongly increases with the degree of undercooling. C1 Univ Duisburg Essen, Inst Phys, D-47048 Duisburg, Germany. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Univ Duisburg Essen, Inst Phys, D-47048 Duisburg, Germany. EM magnus@thp.uni-duisburg.de NR 35 TC 0 Z9 0 U1 0 U2 5 PU TAYLOR & FRANCIS LTD PI ABINGDON PA 2-4 PARK SQUARE, MILTON PARK, ABINGDON OR14 4RN, OXON, ENGLAND SN 0141-1594 EI 1029-0338 J9 PHASE TRANSIT JI Phase Transit. PD JAN-FEB PY 2004 VL 77 IS 1-2 BP 89 EP 100 DI 10.1080/01411590310001622473 PG 12 WC Crystallography; Physics, Condensed Matter SC Crystallography; Physics GA 767MC UT WOS:000188454200009 ER PT S AU Min, MS Chen, QY Maday, Y AF Min, MS Chen, QY Maday, Y BE Adibi, A Scherer, A Lin, SY TI Spectral methods for 2D photonic band structures SO PHOTONIC CRYSTAL MATERIALS AND DEVICES II SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Photonic Crystal Materials and Devices II CY JAN 26-29, 2004 CL San Jose, CA SP SPIE DE spectral-element method; domain decomposition; multidomain variational formulation; Lagrange interpolation polynomials; Gauss-Legendre-Lobatto points AB We consider Maxwell's equations in two-dimensional periodic dielectric media cast as an eigenvalue problem. Multidomain spectral methods are applied in order to compute spectrally accurate eigenfrequencies, which provide the band structures of the photonic crystals. The domain is divided into subdomains whose interfaces include the edges of the different media so that the analytic solution of the eigenproblem is infinitely smooth in each subdomain. This promises that the multidomain spectral approximations perform the exponential rate of convergence to the analytic solution. The band structure calculations are carried out for simple domain structures, and their results are demonstrated. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Min, MS (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 11 TC 1 Z9 1 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 0-8194-5268-8 J9 P SOC PHOTO-OPT INS PY 2004 VL 5360 BP 44 EP 51 DI 10.1117/12.529767 PG 8 WC Crystallography; Optics SC Crystallography; Optics GA BAQ83 UT WOS:000223224600006 ER PT S AU Awwal, AAS AF Awwal, AAS BE Iftekharuddin, KM Awwal, AAS TI Automatic identification of the templates in matched filtering SO PHOTONIC DEVICES AND ALGORITHMS FOR COMPUTING VI 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 VI CY AUG 02-03, 2004 CL Denver, CO SP SPIE DE pattern recognition; matched filtering; optical alignment; automated optical alignment; automated target recognition AB In laser beam position determination, various shapes of markers may be used to identify different beams. When matched filtering is used for identifying the markers, one is faced with the challenge of determining the appropriate filter to use in the presence of distortions and marker size variability. If the incorrect filter is used, it will result in significant position uncertainty. Thus in the very first step of position detection one has to come up with an automated process to select the right template to use. The automated template identification method proposed here is based on a two-step approach. In the first step an approximate type of the object is determined. Then the filter is chosen based on the best size of the specific type. After the appropriate filter is chosen, the correlation peak position is used to identify the beam position. Real world examples of the application of this technique from the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory are presented. C1 Lawrence Livermore Natl Lab, Natl Ingit Facil, Livermore, CA 94551 USA. RP Awwal, AAS (reprint author), Lawrence Livermore Natl Lab, Natl Ingit Facil, Livermore, CA 94551 USA. NR 6 TC 4 Z9 4 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 0-8194-5494-X J9 P SOC PHOTO-OPT INS PY 2004 VL 5556 BP 102 EP 109 DI 10.1117/12.563649 PG 8 WC Optics SC Optics GA BBI19 UT WOS:000225599900011 ER PT S AU Awwal, A McClay, W Ferguson, W Candy, J Salmon, T Wegner, P AF Awwal, A McClay, W Ferguson, W Candy, J Salmon, T Wegner, P BE Iftekharuddin, KM Awwal, AAS TI Composite amplitude modulated phase only filter based detection and tracking of the back-reflection of KDP images SO PHOTONIC DEVICES AND ALGORITHMS FOR COMPUTING VI 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 VI CY AUG 02-03, 2004 CL Denver, CO SP SPIE DE pattem recognition; matched filtering; amplitude modulated phase only filter; target tracking; optical alignment; automated optical alignment; centroid; KDP; NIF ID RECOGNITION AB An algorithm for determining the position of the KDP back-reflection image was developed. It was compared to a centroid-based algorithm. While the algorithm based on centroiding exhibited a radial standard deviation of 9 pixels, the newly proposed algorithm based on classical matched filtering (CMF) and a Gaussian fit to correlation peak provided a radial standard deviation of less than 1 pixel. The speed of the peak detection was improved from an average of 5.5 seconds for Gaussian fit to 0.022 seconds by using a polynomial fit. The performance was enhanced even further by utilizing a composite amplitude modulated phase only filter; producing a radial standard deviation of 0.27 pixels. The proposed technique was evaluated on 900+ images with varying degrees of noise and image amplitude as well as real National Ignition Facility (NIF) images. C1 Lawrence Livermore Natl Lab, Natl Ignit Facil, Livermore, CA 94551 USA. RP Awwal, A (reprint author), Lawrence Livermore Natl Lab, Natl Ignit Facil, Livermore, CA 94551 USA. NR 15 TC 2 Z9 2 U1 0 U2 0 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5494-X J9 P SOC PHOTO-OPT INS PY 2004 VL 5556 BP 180 EP 190 DI 10.1117/12.563650 PG 11 WC Optics SC Optics GA BBI19 UT WOS:000225599900018 ER PT S AU McClay, WA Awwal, A Burkhart, S Candy, JV AF McClay, WA Awwal, A Burkhart, S Candy, JV BE Iftekharuddin, KM Awwal, AAS TI Optimization and improvement of FOA corner cube algorithm SO PHOTONIC DEVICES AND ALGORITHMS FOR COMPUTING VI 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 VI CY AUG 02-03, 2004 CL Denver, CO SP SPIE DE matched filter; image processing and analysis; correlation peak; uncertainty calculations; peak detection and estimation AB Alignment of laser beams based on video images is a crucial task necessary to automate operation of the 192 beams at the National Ignition Facility (NIF). The final optics assembly (FOA) is the optical element that aligns the beam into the target chamber. This work presents an algorithm for determining the position of a corner cube alignment image in the final optics assembly. The improved algorithm was compared to the existing FOA algorithm on 900 noise-simulated images. While the existing FOA algorithm based on correlation with a synthetic template has a radial standard deviation of 1 pixel, the new algorithm based on classical matched filtering (CMF) and polynomial fit to the correlation peak improves the radial standard deviation performance to less than 0.3 pixels. In the new algorithm the templates are designed from real data stored during a year of actual operation. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP McClay, WA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 2 TC 6 Z9 6 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 0-8194-5494-X J9 P SOC PHOTO-OPT INS PY 2004 VL 5556 BP 227 EP 232 DI 10.1117/12.562186 PG 6 WC Optics SC Optics GA BBI19 UT WOS:000225599900024 ER PT S AU Awwal, A Candy, J Haynam, C Widmayer, C Bliss, E Burkhart, S AF Awwal, A Candy, J Haynam, C Widmayer, C Bliss, E Burkhart, S BE Iftekharuddin, KM Awwal, AAS TI Accurate position sensing of defocused beams using simulated beam templates SO PHOTONIC DEVICES AND ALGORITHMS FOR COMPUTING VI 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 VI CY AUG 02-03, 2004 CL Denver, CO SP SPIE DE pattern recognition; matched filtering; amplitude modulated phase only filter; AMPOF; phase-only filter; target tracking; optical alignment; automated optical alignment ID FILTER AB In position detection using matched filtering one is faced with the challenge of determining the best position in the presence of distortions such as defocus and diffraction noise. This work evaluates the performance of simulated defocused images as the template against the real defocused beam. It was found that an amplitude modulated phase-only filter is better equipped to deal with real defocused images that suffer from diffraction noise effects resulting in a textured spot intensity pattern. It is shown that the there is a tradeoff of performance dependent upon the type and size of the defocused image. A novel automated system was developed that can automatically select the right template type and size. Results of this automation for real defocused images are presented. C1 Lawrence Livermore Natl Lab, Natl Ignit Facil, Livermore, CA 94551 USA. RP Awwal, A (reprint author), Lawrence Livermore Natl Lab, Natl Ignit Facil, Livermore, CA 94551 USA. NR 6 TC 4 Z9 4 U1 1 U2 1 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5494-X J9 P SOC PHOTO-OPT INS PY 2004 VL 5556 BP 233 EP 242 DI 10.1117/12.563653 PG 10 WC Optics SC Optics GA BBI19 UT WOS:000225599900025 ER PT S AU McClay, WA Awwal, A Jones, H Wilhelmsen, K Ferguson, W McGee, M Miller, M AF McClay, WA Awwal, A Jones, H Wilhelmsen, K Ferguson, W McGee, M Miller, M BE Iftekharuddin, KM Awwal, AAS TI Evaluation of laser based alignment algorithms under additive random and diffraction noise SO PHOTONIC DEVICES AND ALGORITHMS FOR COMPUTING VI 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 VI CY AUG 02-03, 2004 CL Denver, CO SP SPIE DE centroiding; automatic alignment; image processing; Monte Carlo simulation; noise modeling; uncertainty estimation; algorithm reliability; performance of algorithm; optical alignment AB The purpose of the automatic alignment algorithm at the National Ignition Facility (NIF) is to determine the position of a laser beam based on the position of beam features from video images. The position information obtained is used to command motors and attenuators to adjust the beam lines to the desired position, which facilitates the alignment of all 192 beams. One of the goals of the algorithm development effort is to ascertain the performance, reliability, and uncertainty of the position measurement. This paper describes a method of evaluating the performance of algorithms using Monte Carlo simulation. In particular we show the application of this technique to the LM1_LM3 algorithm, which determines the position of a series of two beam light sources. The performance of the algorithm was evaluated for an ensemble of over 900 simulated images with varying image intensities and noise counts, as well as varying diffraction noise amplitude and frequency. The performance of the algorithm on the image data set had a tolerance well beneath the 0.5-pixel system requirement. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP McClay, WA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 2 TC 6 Z9 6 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 0-8194-5494-X J9 P SOC PHOTO-OPT INS PY 2004 VL 5556 BP 243 EP 248 DI 10.1117/12.563804 PG 6 WC Optics SC Optics GA BBI19 UT WOS:000225599900026 ER PT S AU Candy, JV Mcclay, W Awwal, A Ferguson, W AF Candy, JV Mcclay, W Awwal, A Ferguson, W BE Iftekharuddin, KM Awwal, AAS TI Optimal centroid position estimation SO PHOTONIC DEVICES AND ALGORITHMS FOR COMPUTING VI 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 VI CY AUG 02-03, 2004 CL Denver, CO SP SPIE AB The alignment of high energy laser beams for potential fusion experiments demand high precision and accuracy by the underlying positioning algorithms. This paper discusses the feasibility of employing on-line optimal position estimators in the form of model-based processors to achieve the desired results. Here we discuss the modeling, development, implementation and processing of model-based processors applied to both simulated and actual beam line data. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Candy, JV (reprint author), Lawrence Livermore Natl Lab, POB 808,L-156, Livermore, CA 94551 USA. NR 10 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 0-8194-5494-X J9 P SOC PHOTO-OPT INS PY 2004 VL 5556 BP 249 EP 260 DI 10.1117/12.564333 PG 12 WC Optics SC Optics GA BBI19 UT WOS:000225599900027 ER PT J AU Anwaruzzaman, M Chin, BL Li, XP Lohr, M Martinez, DA Niyogi, KK AF Anwaruzzaman, M Chin, BL Li, XP Lohr, M Martinez, DA Niyogi, KK TI Genomic analysis of mutants affecting xanthophyll biosynthesis and regulation of photosynthetic light harvesting in Chlamydomonas reinhardtii SO PHOTOSYNTHESIS RESEARCH LA English DT Review DE lutein; lycopene epsilon-cyclase; non-photochemical quenching; PsbS; violaxanthin de-epoxidase; xanthophyll cycle; zeaxanthin ID VIOLAXANTHIN DE-EPOXIDASE; PIGMENT-BINDING PROTEIN; 22 KDA PROTEIN; PHOTOSYSTEM-II; CHLOROPHYLL FLUORESCENCE; ARABIDOPSIS MUTANTS; IN-VIVO; ZEAXANTHIN FORMATION; THERMAL DISSIPATION; ENERGY-DISSIPATION AB When the absorption of light energy exceeds the capacity for its utilization in photosynthesis. regulation of light harvesting is critical in order for photosynthetic organisms to minimize photo-oxidative damage. Thermal dissipation of excess absorbed light energy, measured as non-photochemical quenching (NPQ) of chlorophyll fluorescence, is induced rapidly in response to excess light conditions. and it is known that xanthophylls such as zeaxanthin and lutein, the transthylakoid pH gradient. and the PsbS protein are involved in this mechanism. Although mutants affecting NPQ and the biosynthesis of zeaxanthin and lutein were originally isolated and characterized at the physiological level in the unicellular green alga Chlamydomonas reinhardtii. the molecular basis of several of these mutants. such as npq1 and lor1. has not been determined previously. The recent sequencing of the C. reinhardtii nuclear genome has facilitated the search for C. reinhardtii homologs of plant genes involved in xanthophyll biosynthesis and regulation of light harvesting. Here we report the identification of C. reinhardtii genes encoding PsbS and lycopene epsilon-cyclase. and we show that the lor1 mutation, which affects lutein synthesis, is located within the lycopene epsilon-cyclase, gene. In contrast, no homolog of the plant violaxanthin de-epoxidase (VDE) gene was found. Molecular markers were used to map the npq1 mutation, which affects VDE activity, as a first step toward the map-based cloning of the NPQ1 gene. C1 Univ Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720 USA. Univ Mainz, Inst Allgemeine Bot, D-55128 Mainz, Germany. US Dept Energy Joint Genome Inst, Walnut Creek, CA 94598 USA. RP Niyogi, KK (reprint author), Univ Calif Berkeley, Dept Plant & Microbial Biol, 111 Koshland Hall, Berkeley, CA 94720 USA. EM niyogi@nature.berkeley.edu RI Lohr, Martin/A-1214-2009 NR 57 TC 20 Z9 20 U1 0 U2 13 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0166-8595 J9 PHOTOSYNTH RES JI Photosynth. Res. PY 2004 VL 82 IS 3 BP 265 EP 276 DI 10.1007/s11120-004-2439-y PG 12 WC Plant Sciences SC Plant Sciences GA 889LO UT WOS:000226444700005 ER PT J AU Melis, A Seibert, M Happe, T AF Melis, A Seibert, M Happe, T TI Genomics of green algal hydrogen research SO PHOTOSYNTHESIS RESEARCH LA English DT Review DE Chlamydomonas reinhardtii; HYdA1; HYdA2; photosynthesis; Sta7; SulP; Tlal ID PHOTOSYNTHETIC ELECTRON-TRANSPORT; CHLAMYDOMONAS-REINHARDTII; PHOTOSYSTEM-II; FE-HYDROGENASE; CLOSTRIDIUM-PASTEURIANUM; ANAEROBIC ADAPTATION; SCENEDESMUS-OBLIQUUS; RADICAL MECHANISMS; MOLECULAR-HYDROGEN; IRON-HYDROGENASES AB This article summarizes knowledge on genes and their respective proteins in the field of green algal hydrogen research. Emphasis is placed on recently cloned genes from the unicellular green alga Chlamydomonas reinhardtii, including HydA1 and HydA2, which encode homologous [Fe]-hydrogenases, Tla1, which encodes a chlorophyll antenna size regulatory gene. SulP. which encodes a chloroplast sulfate permease, and Sta7, which encodes an isoamylase. Analysis of the structure and function of these genes and of their respective proteins in C. reinhardtii, and related unicellular green algae, is presented in light of the role they play in the hydrogen metabolism in these organisms. A discussion is offered as to the potential application of these genes in the field of hydrogen photoproduction. C1 Univ Calif Berkeley, Dept Plant & Microbial Biol, Berkeley, CA 94720 USA. Natl Renewable Energy Lab, Basic Sci Ctr, Golden, CO 80401 USA. Ruhr Univ Bochum, Lehrstuhl Biochem Pflanzen AG Photobiotechnol, D-4630 Bochum, Germany. RP Melis, A (reprint author), Univ Calif Berkeley, Dept Plant & Microbial Biol, 111 Koshland Hall, Berkeley, CA 94720 USA. EM melis@nature.berkeley.edu NR 69 TC 26 Z9 30 U1 0 U2 5 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0166-8595 J9 PHOTOSYNTH RES JI Photosynth. Res. PY 2004 VL 82 IS 3 BP 277 EP 288 DI 10.1007/s11120-004-2050-2 PG 12 WC Plant Sciences SC Plant Sciences GA 889LO UT WOS:000226444700006 ER PT J AU Berry, EA Huang, LS Saechao, LK Pon, NG Valkova-Valchanova, M Daldal, F AF Berry, EA Huang, LS Saechao, LK Pon, NG Valkova-Valchanova, M Daldal, F TI X-ray structure of Rhodobacter capsulatus cytochrome bc(1): comparison with its mitochondrial and chloroplast counterparts SO PHOTOSYNTHESIS RESEARCH LA English DT Article DE cytochrome bc(1); electron transport; photosynthesis; respiration; X-ray structure ID IRON-SULFUR PROTEIN; ELECTRON-TRANSFER CHAIN; Q-CYCLE MECHANISM; B(6)F COMPLEX; Q(O) SITE; CRYSTAL-STRUCTURE; DOMAIN MOVEMENT; BC1 COMPLEX; RHODOPSEUDOMONAS-SPHAEROIDES; SACCHAROMYCES-CEREVISIAE AB Ubihydroquinone: cytochrome (cyt) c oxidoreductase, or cyt bc(1), is a widespread, membrane integral enzyme that plays a crucial role during photosynthesis and respiration. It is one of the major contributors of the electrochemical proton gradient, which is subsequently used for ATP synthesis. The simplest form of the cyt bc(1) is found in bacteria, and it contains only the three ubiquitously conserved catalytic subunits: the Fe-S protein, cyt b and cyt c(1). Here we present a preliminary X-ray structure of Rhodobacter capsulatus cyt bc1 at 3.8 Angstrom and compare it to the available structures of its homologues from mitochondria and chloroplast. Using the bacterial enzyme structure, we highlight the structural similarities and differences that are found among the three catalytic subunits between the members of this family of enzymes. In addition, we discuss the locations of currently known critical mutations, and their implications in terms of the cyt bc(1) catalysis. C1 Univ Penn, Dept Biol, Philadelphia, PA 19104 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Berry, EA (reprint author), Univ Penn, Dept Biol, Philadelphia, PA 19104 USA. EM eaberry@lbl.gov; fdaldal@sas.upenn.edu FU NIGMS NIH HHS [R01 GM038237] NR 68 TC 150 Z9 158 U1 0 U2 3 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0166-8595 J9 PHOTOSYNTH RES JI Photosynth. Res. PY 2004 VL 81 IS 3 BP 251 EP 275 DI 10.1023/B:PRES.0000036888.18223.0e PG 25 WC Plant Sciences SC Plant Sciences GA 843OR UT WOS:000223094000006 PM 16034531 ER PT J AU Fajer, J AF Fajer, J TI Chlorophyll chemistry before and after crystals of photosynthetic reaction centers SO PHOTOSYNTHESIS RESEARCH LA English DT Review DE chlorophyll donors and acceptors; Richard Cogdell; conformational effects; Johann Deisenhofer; Les Dutton; Jack Fajer; George Feher; Wolfgang Lubitz; Hartmut Michel; Klaus Mobius; James Norris; optical and redox properties; William Parson; Martin Plato; primary charge separation; reaction center and antenna crystal structures; Peter Rentzepis; Maurice Winsdor; Horst Witt; Michael Zerner ID PRIMARY CHARGE SEPARATION; PRIMARY ELECTRON-ACCEPTOR; II REACTION-CENTER; PHOTOSYSTEM-II; CATION RADICALS; RHODOPSEUDOMONAS-VIRIDIS; BACTERIAL PHOTOSYNTHESIS; PLANT PHOTOSYNTHESIS; FREE-BASE; BACTERIOCHLOROPHYLL-A AB The experimental, theoretical and structural research leading to the identification and characterization of the ( bacterio) chlorophyll species that mediate the primary events of solar energy transduction and dynamics is reviewed and examined from the author's perspective. C1 Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA. RP Fajer, J (reprint author), Brookhaven Natl Lab, Dept Mat Sci, Bldg 555, Upton, NY 11973 USA. EM fajerj@bnl.gov NR 51 TC 12 Z9 12 U1 1 U2 4 PU SPRINGER PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0166-8595 J9 PHOTOSYNTH RES JI Photosynth. Res. PY 2004 VL 80 IS 1-3 BP 165 EP 172 DI 10.1023/B:PRES.0000030422.69367.db PG 8 WC Plant Sciences SC Plant Sciences GA 827DI UT WOS:000221878600013 ER PT J AU Wu, W Watson, JT Stevens, FJ Yousefzai, R Anderson, LE AF Wu, W Watson, JT Stevens, FJ Yousefzai, R Anderson, LE TI Mass spectrometric evidence for an alternate disulfide bond in chloroplast fructose bisphosphatase SO PHOTOSYNTHESIS RESEARCH LA English DT Article DE alternate disulfide bonds; CN-induced cleavage; fructose bisphosphatase; light-activation; mass mapping; redox-regulation ID GLYCERALDEHYDE-3-PHOSPHATE DEHYDROGENASE; FRUCTOSE-1,6-BISPHOSPHATASE; PROTEINS; SPINACH; ENZYME; 1,6-BISPHOSPHATASE; IDENTIFICATION; MODULATION; CLEAVAGE; PEPTIDE AB Mass mapping analysis based on cyanylation (CN) of the protein and CN-induced cleavage indicates that all three cysteine residues in the insertion into the light-activated pea leaf chloroplast fructose bisphosphatase (E.C. 3.1.3.11) are able to participate in disulfide bond formation. There is a major peak in the mass spectrum of the cleavage products indicating that Cys173 forms a disulfide bond with Cys153, consistent with the structure of the oxidized enzyme in PDB files 1d9q and 1dcu, and a minor peak indicating that Cys173 forms an alternate disulfide bond with Cys178. The Cys173-Cys178 disulfide bond was not apparent in the available crystal structures. C1 Univ Illinois, Dept Biol Sci, Chicago, IL 60680 USA. Michigan State Univ, Dept Chem, E Lansing, MI 48824 USA. Argonne Natl Lab, Biosci Div, Argonne, IL 60439 USA. Univ Illinois, Dept Chem, Chicago, IL 60680 USA. RP Anderson, LE (reprint author), Univ Illinois, Dept Biol Sci, 845 W Taylor, Chicago, IL 60680 USA. EM louise@uic.edu NR 18 TC 1 Z9 1 U1 1 U2 1 PU KLUWER ACADEMIC PUBL PI DORDRECHT PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS SN 0166-8595 J9 PHOTOSYNTH RES JI Photosynth. Res. PY 2004 VL 79 IS 2 BP 189 EP 200 DI 10.1023/B:PRES.0000015407.61574.63 PG 12 WC Plant Sciences SC Plant Sciences GA 772RH UT WOS:000188854700007 PM 16228393 ER PT J AU Brown, G Novotny, MA Rikvold, PA AF Brown, G Novotny, MA Rikvold, PA TI Projective dynamics analysis of magnetization reversal SO PHYSICA B-CONDENSED MATTER LA English DT Article; Proceedings Paper CT 4th International Symposium on Hysteresis and Micromagnetic Modeling (HMM 2003) CY MAY 28-30, 2003 CL SALAMANCA, SPAIN DE magnetization reversal; projective dynamics; micromagnetics ID PARTICLES; SYSTEMS; STATE AB The computational Projective Dynamics method is used to analyze simulations of magnetization reversal in nanoscale magnetic pillars. It is shown that this method can be used to determine the magnetizations corresponding to the metastable minimum and saddle point in the free energy, and the free-energy barrier associated with those points. For the nanopillars studied here, entropy is found to provide a significant contribution to the free-energy barrier which determines the reversal time scale. (C) 2003 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Ctr Computat Sci, Oak Ridge, TN 37831 USA. Florida State Univ, Sch Computat Sci & Informat Technol, Tallahassee, FL 32306 USA. Mississippi State Univ, Dept Phys & Astron, Mississippi State, MS 39762 USA. Mississippi State Univ, ERC Ctr Computat Sci, Mississippi State, MS 39762 USA. Florida State Univ, CSIT, Dept Phys, Tallahassee, FL 32303 USA. Florida State Univ, MARTECH, Tallahassee, FL 32303 USA. RP Brown, G (reprint author), Oak Ridge Natl Lab, Ctr Computat Sci, POB 2008, Oak Ridge, TN 37831 USA. EM browngrg@csit.fsu.edu RI Brown, Gregory/F-7274-2016 OI Brown, Gregory/0000-0002-7524-8962 NR 15 TC 2 Z9 2 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0921-4526 J9 PHYSICA B JI Physica B PD JAN 1 PY 2004 VL 343 IS 1-4 BP 195 EP 199 DI 10.1016/j.physb.2003.08.093 PG 5 WC Physics, Condensed Matter SC Physics GA 767RE UT WOS:000188465800037 ER PT J AU Hoover, WG Aoki, K Hoover, CG De Groot, SV AF Hoover, WG Aoki, K Hoover, CG De Groot, SV TI Time-reversible deterministic thermostats SO PHYSICA D-NONLINEAR PHENOMENA LA English DT Article; Proceedings Paper CT International Workshop and Seminar on Microscopic Chaos and Transport in Many Particle Systems CY AUG 05-25, 2002 CL DRESDEN, GERMANY DE nonequilibrium; molecular dynamics; heat flow; thermostats ID STATISTICAL-MECHANICS; CANONICAL ENSEMBLE; DYNAMICS; TEMPERATURE; SYSTEMS; CHAINS AB Seven different time-reversible deterministic thermostats are considered here and applied to a simple particle-based nonequilibrium heat-flow problem. This approach is robust. Results for all these different thermostats agree rather well for system widths of ten particle diameters or more. The simplest of the thermostats is the Gauss-Nose-Hoover thermostat, based on kinetic-energy control. Higher moments of the particle momenta can be controlled by extensions of this idea involving as many as three additional thermostat variables. Generalizations of the deterministic thermostats suited to simulating "stochastic" and "Brownian" dynamics are discussed here too. (C) 2003 Elsevier B.V. All rights reserved. C1 Univ Calif Davis, Dept Appl Sci, Livermore, CA 94551 USA. Lawrence Livermore Natl Lab, Methods Dev Grp, Livermore, CA 94551 USA. Keio Univ, Dept Phys, Kohoku Ku, Yokohama, Kanagawa 2238521, Japan. RP Univ Calif Davis, Dept Appl Sci, Livermore, CA 94551 USA. EM biru@midway.llnl.gov NR 22 TC 33 Z9 33 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2789 EI 1872-8022 J9 PHYSICA D JI Physica D PD JAN 1 PY 2004 VL 187 IS 1-4 BP 253 EP 267 DI 10.1016/j.physd.2003.09.016 PG 15 WC Mathematics, Applied; Physics, Multidisciplinary; Physics, Mathematical SC Mathematics; Physics GA 761KY UT WOS:000187909000019 ER PT J AU Posch, HA Hoover, WG AF Posch, HA Hoover, WG TI Large-system phase-space dimensionality loss in stationary heat flows SO PHYSICA D-NONLINEAR PHENOMENA LA English DT Article; Proceedings Paper CT International Workshop and Seminar on Microscopic Chaos and Transport in Many Particle Systems CY AUG 05-25, 2002 CL DRESDEN, GERMANY DE fractals; heat flow; irreversibility; phase-space dimensionality ID HAMILTONIAN STATISTICAL-MECHANICS; NONEQUILIBRIUM STEADY-STATES; DYNAMICS; ENTROPY AB Thermostated tethered harmonic lattices provide good illustrations of the phase-space dimensionality loss DeltaD which occurs in the strange attractor distributions characterizing stationary nonequilibrium flows. We use time-reversible nonequilibrium molecular dynamics, with two Nose-Hoover thermostats, one hot and one cold, to study a family of square heat-conducting systems. We find a phase-space dimensionality loss which can exceed the dimensionality associated with the two driving Nose-Hoover thermostats by as much as a factor of four. We also estimate the dimensionality loss DeltaD(H) in the nonthermostated (Hamiltonian) part of phase-space. By measuring the projection of the total dimensionality loss there we show that nearly all of the loss occurs in the nonthermostated part. Thus this loss, which characterizes the extreme rarity of nonequilibrium states, persists in the large-system thermodynamic limit. (C) 2003 Elsevier B.V. All rights reserved. C1 Univ Vienna, Inst Expt Phys, A-1090 Vienna, Austria. Univ Calif Davis, Dept Appl Sci, Livermore, CA 94551 USA. Lawrence Livermore Natl Lab, Methods Dev Grp, Livermore, CA 94551 USA. RP Univ Vienna, Inst Expt Phys, Boltzmanngasse 5, A-1090 Vienna, Austria. EM posch@ls.exp.univie.ac.at; hoover3@llnl.gov NR 22 TC 15 Z9 15 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2789 EI 1872-8022 J9 PHYSICA D JI Physica D PD JAN 1 PY 2004 VL 187 IS 1-4 BP 281 EP 293 DI 10.1016/j.physd.2003.09.015 PG 13 WC Mathematics, Applied; Physics, Multidisciplinary; Physics, Mathematical SC Mathematics; Physics GA 761KY UT WOS:000187909000021 ER PT J AU Forster, C Hirschl, R Posch, HA Hoover, WG AF Forster, C Hirschl, R Posch, HA Hoover, WG TI Perturbed phase-space dynamics of hard-disk fluids SO PHYSICA D-NONLINEAR PHENOMENA LA English DT Article; Proceedings Paper CT International Workshop and Seminar on Microscopic Chaos and Transport in Many Particle Systems CY AUG 05-25, 2002 CL DRESDEN, GERMANY DE hydrodynamic modes; lyapunov spectrum; localized modes; fluid dynamics ID LYAPUNOV INSTABILITY; SYSTEMS; MODES; EQUILIBRIUM; SPECTRA; STATES; CHAOS AB The Lyapunov spectrum describes the exponential growth, or decay, of infinitesimal phase-space perturbations. The perturbation associated with the maximum Lyapunov exponent is strongly localized in space, and only a small fraction of all particles contributes to the perturbation growth at any instant of time. This fraction converges to zero in the thermodynamic large-particle-number limit. For hard-disk and hard-sphere systems the perturbations belonging to the smallest of the non-vanishing exponents are coherently spread out and form orthogonal periodic structures in space, the "Lyapunov modes". There are two types of mode polarizations, transverse and longitudinal. The transverse modes do not propagate, but the longitudinal modes do, with a speed about one third of the sound speed. We characterize the symmetry and the degeneracy of the modes. In the thermodynamic limit the Lyapunov spectrum has a diverging slope near the intersection with the abscissa. No positive lower bound exists for the positive exponents. The mode amplitude scales with the inverse square root of the particle number as expected from the normalization of the perturbation vectors. (C) 2003 Elsevier B.V. All rights reserved. C1 Univ Vienna, Inst Expt Phys, A-1090 Vienna, Austria. Univ Vienna, Inst Mat Phys, A-1090 Vienna, Austria. Univ Calif Davis, Dept Appl Sci, Livermore, CA 94551 USA. Lawrence Livermore Natl Lab, Methods Dev Grp, Livermore, CA 94551 USA. RP Posch, HA (reprint author), Univ Vienna, Inst Expt Phys, Boltzmanngasse 5, A-1090 Vienna, Austria. EM tina@ap.univie.ac.at; robin.hirschl@univie.ac.at; posch@ls.exp.univie.ac.at; hoover3@llnl.gov NR 40 TC 38 Z9 38 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2789 J9 PHYSICA D JI Physica D PD JAN 1 PY 2004 VL 187 IS 1-4 BP 294 EP 310 DI 10.1016/j.physd.2003.09.013 PG 17 WC Mathematics, Applied; Physics, Multidisciplinary; Physics, Mathematical SC Mathematics; Physics GA 761KY UT WOS:000187909000022 ER PT J AU Walukiewicz, W AF Walukiewicz, W TI Narrow band gap group III-nitride alloys SO PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES LA English DT Article; Proceedings Paper CT 11th International Conference on Narrow Gap Semiconductors CY JUN 16-20, 2003 CL UNIV BUFFALO, BUFFALO, NEW YORK HO UNIV BUFFALO DE InN; group III-nitrides; nonparabolic bands; bowing parameters; dilute nitrides; band anticrossing; electron effective mass; highly mismatched alloys ID CHEMICAL-VAPOR-DEPOSITION; MOLECULAR-BEAM EPITAXY; ATOMIC LAYER EPITAXY; SEMICONDUCTOR ALLOYS; OPTICAL-PROPERTIES; INN; DEPENDENCE; NITROGEN; ENERGY; ABSORPTION AB Recent results on the properties of narrow gap group III-nitrides and their alloys are reviewed. It is shown that InN with the energy gap of 0.7 eV exhibits classical characteristics of a narrow gap semiconductor with strongly nonparabolic conduction band and an energy dependent electron effective mass. With the new discovery, the direct band gaps of the group III-nitride alloys span an extremely wide energy range from near infrared in InN to deep ultraviolet in AlN offering possibilities for new device applications of these materials. We also discuss properties of dilute group III-N-V alloys in which incorporation of a small amount of nitrogen results in a dramatic band gap reduction. All the unusual properties of the alloys are well described by a band anticrossing model that considers an interaction between localized nitrogen states and the extended states of the conduction band. (C) 2003 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Walukiewicz, W (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. EM w_walukiewicz@lbl.gov NR 54 TC 23 Z9 23 U1 0 U2 11 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1386-9477 J9 PHYSICA E JI Physica E PD JAN PY 2004 VL 20 IS 3-4 BP 300 EP 307 DI 10.1016/j.physe.2003.08.023 PG 8 WC Nanoscience & Nanotechnology; Physics, Condensed Matter SC Science & Technology - Other Topics; Physics GA 768VF UT WOS:000188555200024 ER PT J AU Wojtowicz, T Lim, WL Liu, X Cywinski, G Kutrowski, M Titova, LV Yee, K Dobrowolska, M Furdyna, JK Yu, KM Walukiewicz, W Kim, GB Cheon, M Chen, X Wang, SM Luo, H Vurgaftman, I Meyer, JR AF Wojtowicz, T Lim, WL Liu, X Cywinski, G Kutrowski, M Titova, LV Yee, K Dobrowolska, M Furdyna, JK Yu, KM Walukiewicz, W Kim, GB Cheon, M Chen, X Wang, SM Luo, H Vurgaftman, I Meyer, JR TI Growth and properties of ferromagnetic In1-xMnxSb alloys SO PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES LA English DT Article; Proceedings Paper CT 11th International Conference on Narrow Gap Semiconductors CY JUN 16-20, 2003 CL UNIV BUFFALO, BUFFALO, NY HO UNIV BUFFALO DE InMnSb; ferromagnetic semiconductors; magnetization; anomalous Hall effect; magnetic circular dichroism; magneto-optical Kerr effect; RBS; PIXE ID SEMICONDUCTOR HETEROSTRUCTURES; TEMPERATURE AB We discuss a new narrow-gap ferromagnetic (FM) semiconductor alloy, In1-xMnxSb, and its growth by low-temperature molecular-beam epitaxy. The magnetic properties were investigated by direct magnetization measurements, electrical transport, magnetic circular dichroism, and the magneto-optical Kerr effect. These data clearly indicate that In1-xMnxSb possesses all the attributes of a system with carrier-mediated FM interactions, including well-defined hysteresis loops, a cusp in the temperature dependence of the resistivity, strong negative magnetoresistance, and a large anomalous Hall effect. The Curie temperatures in samples investigated thus far range up to 8.5 K, which are consistent with a mean-field-theory simulation of the carrier-induced ferromagnetism based on the 8-band effective band-orbital method. (C) 2003 Elsevier B.V. All rights reserved. C1 Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. USN, Res Lab, Washington, DC 20375 USA. SUNY Buffalo, Dept Phys, Buffalo, NY 14260 USA. Lawrence Berkeley Lab, Div Mat Sci, Elect Mat Program, Berkeley, CA 94720 USA. Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland. RP Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA. EM wojto@ifpan.edu.pl RI Yu, Kin Man/J-1399-2012; Wang, Shumin/O-5364-2014; Titova, Lyubov/B-6172-2015; Wojtowicz, Tomasz/A-2887-2017 OI Yu, Kin Man/0000-0003-1350-9642; Wang, Shumin/0000-0002-4993-9460; Titova, Lyubov/0000-0002-2146-9102; NR 25 TC 26 Z9 27 U1 0 U2 6 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 1386-9477 EI 1873-1759 J9 PHYSICA E JI Physica E PD JAN PY 2004 VL 20 IS 3-4 BP 325 EP 332 DI 10.1016/j.physe.2003.08.028 PG 8 WC Nanoscience & Nanotechnology; Physics, Condensed Matter SC Science & Technology - Other Topics; Physics GA 768VF UT WOS:000188555200029 ER PT J AU Whyte, DG Brooks, JN Stangeby, PC Brooks, NH AF Whyte, D. G. Brooks, J. N. Stangeby, P. C. Brooks, N. H. TI A detailed study of carbon chemical erosion in L-mode plasmas in the DIII-D divertor SO PHYSICA SCRIPTA LA English DT Article AB A series of quiescent L-mode discharges have been used with varying degrees of divertor attachment to study carbon erosion in the DIII-D tokamak divertor. Spectra of atomic and molecular carbon plasma emissions are measured across the divertor. Predictions of carbon emission resulting from chemical and physical sputtering at the outer strikepoint are provided by the WBC transport code. For attached ionizing plasmas (T-e similar to 20 eV and carbon surface T similar to 350K) the CD and C-2 carbon radical emissions are consistent with a total chemical sputtering yield, Ychem similar to 0.3%: During sweeps of the inner divertor leg, CD and C-2 emissions indicate the main-wall tiles has a six times higher Ychem than the divertor tiles despite identical incident plasma conditions. Emission of atomic (CI) and singly ionized carbon are dominated by physical sputtering with a measured yield Y-phys similar to 2% as expected from laboratory data, indicating that chemical sputtering plays a minor role as a divertor carbon source. The Doppler broadening of the CI emission agrees with the physical sputtering model, but the predicted Doppler shift is a factor three larger than the experiment. CD and C-2 emission are reduced below detection during divertor detachment (T-e similar to 1 similar to 2 eV), an indication of the suppression of chemical erosion with Y-chem < 10(-4) based on expected photon intensity from WBC. C1 [Whyte, D. G.] Univ Wisconsin, Madison, WI 53706 USA. [Brooks, J. N.] Argonne Natl Lab, Argonne, IL 60439 USA. [Stangeby, P. C.] Univ Toronto, Inst Aerosp Studies, Toronto, ON, Canada. [Brooks, N. H.] Gen Atom, San Diego, CA USA. RP Whyte, DG (reprint author), Univ Wisconsin, Madison, WI 53706 USA. EM whyte@engr.wisc.edu NR 25 TC 11 Z9 11 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0031-8949 J9 PHYS SCRIPTA JI Phys. Scr. PY 2004 VL T111 BP 34 EP 41 DI 10.1238/Physica.Topical.111a00034 PG 8 WC Physics, Multidisciplinary SC Physics GA V63EZ UT WOS:000204271700006 ER PT J AU Berrah, N Bilodeau, RC Ackerman, G Bozek, JD Turri, G Rude, B Gibson, ND Walter, CW Aguilar, A AF Berrah, N. Bilodeau, R. C. Ackerman, G. Bozek, J. D. Turri, G. Rude, B. Gibson, N. D. Walter, C. W. Aguilar, A. TI Probing negative ions from within SO PHYSICA SCRIPTA LA English DT Article AB K-shell photodetachment studies of negative ions have been carried out using a collinear photon-ion apparatus coupled with the brightness and spectral resolution of the Advanced Light Source at Lawrence Berkeley National Laboratory. The experimental results, which revealed new phenomena, are pushing the limits of third generation photon sources and are stimulating various enhanced theories. C1 [Berrah, N.; Bilodeau, R. C.; Turri, G.] Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA. [Bilodeau, R. C.; Ackerman, G.; Bozek, J. D.; Rude, B.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. [Gibson, N. D.; Walter, C. W.] Denison Univ, Dept Phys & Astron, Granville, OH 43023 USA. [Aguilar, A.] Univ Nevada, Dept Phys, Reno, NV 89557 USA. RP Berrah, N (reprint author), Western Michigan Univ, Dept Phys, Kalamazoo, MI 49008 USA. EM Berrah@wmich.edu RI Bozek, John/E-4689-2010; Bozek, John/E-9260-2010; OI Bozek, John/0000-0001-7486-7238; Bilodeau, Rene/0000-0001-8607-2328 NR 39 TC 5 Z9 5 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0031-8949 J9 PHYS SCRIPTA JI Phys. Scr. PY 2004 VL T110 BP 51 EP 56 DI 10.1238/Physica.Topical.110a00051 PG 6 WC Physics, Multidisciplinary SC Physics GA V63EY UT WOS:000204271600006 ER PT J AU Kaganovich, ID Startsev, EA Davidson, RC AF Kaganovich, Igor D. Startsev, Edward A. Davidson, Ronald C. TI Analytical and numerical studies of the complex interaction of a fast ion beam pulse with a background plasma SO PHYSICA SCRIPTA LA English DT Article AB Plasma neutralization of an intense ion beam pulse is of interest for many applications, including plasma lenses, heavy ion fusion, high energy physics, etc. Comprehensive analytical, numerical and experimental studies are underway to investigate the complex interaction of a fast ion beam with a background plasma. The positively charged ion beam attracts plasma electrons, and as a result the plasma electrons have a tendency to neutralize the beam charge and current. A suite of particle-in-cell codes has been developed to study the propagation of an ion beam pulse through the background plasma. For quasi-steady-state propagation of the ion beam pulse, an analytical theory has been developed using the assumption of long charge bunches and conservation of generalized vorticity. The analytical results agree well with the results of the numerical simulations. The visualization of the data obtained in the numerical simulations shows complex collective phenomena during beam entry into and exit from the plasma. C1 [Kaganovich, Igor D.; Startsev, Edward A.; Davidson, Ronald C.] Princeton Univ, Plasma Phys Lab, Princeton, NJ 08543 USA. RP Kaganovich, ID (reprint author), Princeton Univ, Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 10 TC 8 Z9 8 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0031-8949 J9 PHYS SCRIPTA JI Phys. Scr. PY 2004 VL T107 BP 54 EP 58 DI 10.1238/Physica.Topical.107a00054 PG 5 WC Physics, Multidisciplinary SC Physics GA V62QB UT WOS:000204232900010 ER PT J AU Sugiyama, K Tanabe, T Skinner, CH Gentile, CA AF Sugiyama, K. Tanabe, T. Skinner, C. H. Gentile, C. A. TI Measurement of tritium surface distribution on TFTR bumper limiter tiles SO PHYSICA SCRIPTA LA English DT Article ID FUSION TEST REACTOR; CARBON; DEPOSITION; RETENTION; EROSION; WALL AB The tritium surface distribution on graphite tiles used in the TFTR bumper limiter and exposed to TFTR D-T discharges from 1993 to 1997 was measured by the Tritium Imaging Plate Technique (TIPT). The TFTR bumper limiter shows both re-/co-deposition and erosion. The tritium images for all tiles measured are strongly correlated with erosion and deposition patterns, and long-term tritium retention was found in the re-/co-depositions and flakes. The CFC tiles located at erosion dominated areas clearly showed their woven structure in their tritium images owing to different erosion yields between fibers and matrix. Significantly high tritium retention was observed on all sides of the erosion tiles, indicating carbon transport via repetition of local erosion/deposition cycles. C1 [Sugiyama, K.; Tanabe, T.] Nagoya Univ, Grad Sch Engn, Dept Nucl Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan. [Skinner, C. H.; Gentile, C. A.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Sugiyama, K (reprint author), Nagoya Univ, Grad Sch Engn, Dept Nucl Engn, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648603, Japan. EM h022413m@mbox.nagoya-u.ac.jp NR 21 TC 7 Z9 7 U1 1 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0031-8949 EI 1402-4896 J9 PHYS SCRIPTA JI Phys. Scr. PY 2004 VL T108 BP 68 EP 71 PG 4 WC Physics, Multidisciplinary SC Physics GA V62QC UT WOS:000204233000013 ER PT J AU Wirth, BD Bringa, EM AF Wirth, B. D. Bringa, E. M. TI A kinetic Monte Carlo model for helium diffusion and clustering in fusion environments SO PHYSICA SCRIPTA LA English DT Article AB Structural materials in fusion reactors will operate in harsh radiation conditions including high displacement rates from 14MeV neutrons with accompanying high levels of hydrogen and helium production and will experience severe property degradation. Predicting their in-service performance requires a detailed understanding of the mechanisms of defect accumulation and microstructure evolution. The physical processes involved in radiation damage are inherently multiscale, spanning more than 15 orders of magnitude in length and 24 orders of magnitude in time. Here, we describe a kinetic Monte Carlo (KMC) model to simulate the migration and clustering of transmutant helium gas atoms and ultimately determine the role of helium in mediating the long term aging of primary defects (vacancies, self-interstitial atoms and their clusters) produced in displacement cascades. The results illustrate the mechanisms responsible for the formation of vacancy-He clusters, in particular the high mobility of small vacancy-He clusters, which often lead to cluster growth through cluster-cluster coalescence events. C1 [Wirth, B. D.] Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA. [Bringa, E. M.] Lawrence Livermore Natl Lab, Chem & Mat Sci Directorate, Livermore, CA 94550 USA. RP Wirth, BD (reprint author), Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA. EM bdwirth@nuc.berkeley.edu RI Bringa, Eduardo/F-8918-2011; Wirth, Brian/O-4878-2015 OI Wirth, Brian/0000-0002-0395-0285 NR 23 TC 21 Z9 21 U1 0 U2 7 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0031-8949 J9 PHYS SCRIPTA JI Phys. Scr. PY 2004 VL T108 BP 80 EP 84 PG 5 WC Physics, Multidisciplinary SC Physics GA V62QC UT WOS:000204233000016 ER PT J AU Harkonen, J Tuovinen, E Luukka, P Tuominen, E Lassila-Perini, K Nysten, J Li, Z Eremin, V Ivanov, A Verbitskaya, E Heikkila, P Ovchinnikov, V Yli-Koski, M Laitinen, P Riihimaki, I Virtanen, A AF Harkonen, J. Tuovinen, E. Luukka, P. Tuominen, E. Lassila-Perini, K. Nysten, J. Li, Z. Eremin, V. Ivanov, A. Verbitskaya, E. Heikkila, P. Ovchinnikov, V. Yli-Koski, M. Laitinen, P. Riihimaki, I. Virtanen, A. TI Particle detectors made of high resistivity Czochralski grown silicon SO PHYSICA SCRIPTA LA English DT Article AB We describe the fabrication process of full-size silicon microstrip detectors processed on silicon wafers grown by magnetic Czochralski method. Defect analysis by DLTS spectroscopy as well as minority carrier lifetime measurements by mu PCD method are presented. The electrical and detection properties of the Czochralski silicon detectors are comparable to those of leading commercial detector manufacturers. The radiation hardness of the Czochralski silicon detectors was proved to be superior to the devices made of traditional Float Zone silicon material. C1 [Harkonen, J.; Tuovinen, E.; Luukka, P.; Tuominen, E.; Lassila-Perini, K.; Nysten, J.] Univ Helsinki, Helsinki Inst Phys, FIN-00014 Helsinki, Finland. [Li, Z.] Brookhaven Natl Lab, Upton, NY 11973 USA. [Eremin, V.; Ivanov, A.; Verbitskaya, E.] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia. [Heikkila, P.; Ovchinnikov, V.] Helsinki Univ Technol, Ctr Microelect, FIN-02150 Espoo, Finland. [Yli-Koski, M.] Helsinki Univ Technol, Electron Phys Lab, FIN-02150 Espoo, Finland. [Laitinen, P.; Riihimaki, I.; Virtanen, A.] Univ Jyvaskyla, Accelerator Lab, Jyvaskyla 40014, Finland. RP Harkonen, J (reprint author), Univ Helsinki, Helsinki Inst Phys, FIN-00014 Helsinki, Finland. EM jaakko.haerkoenen@cern.ch RI Verbitskaya, Elena/D-1521-2014; Ivanov, Alexander/E-3993-2014; Tuominen, Eija/A-5288-2017; OI Tuominen, Eija/0000-0002-7073-7767; Virtanen, Ari/0000-0002-6591-6787; Luukka, Panja/0000-0003-2340-4641 NR 11 TC 2 Z9 2 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0031-8949 J9 PHYS SCRIPTA JI Phys. Scr. PY 2004 VL T114 BP 88 EP 90 DI 10.1088/0031-8949/2004/T114/021 PG 3 WC Physics, Multidisciplinary SC Physics GA V63FC UT WOS:000204272000022 ER PT J AU Skinner, CH Coad, JP Federici, G AF Skinner, C. H. Coad, J. P. Federici, G. TI Tritium removal from carbon plasma facing components SO PHYSICA SCRIPTA LA English DT Article ID HYDROGEN ISOTOPE RETENTION; FUSION TEST REACTOR; SCANNING LASER; TFTR TILES; JET; DEUTERIUM; RELEASE; LAYERS; INVENTORY; EROSION AB Tritium removal is a major unsolved development task for next-step devices with carbon plasma facing components. The 2-3 order of magnitude increase in duty cycle and associated tritium accumulation rate in a next-step tokamak will place unprecedented demands on tritium removal technology. The associated technical risk can be mitigated only if suitable removal techniques are demonstrated on tokamaks before the construction of a next-step device. This article reviews the history of codeposition, the tritium experience of TFTR and JET and the tritium removal rate required to support ITER's planned operational schedule. The merits and shortcomings of various tritium removal techniques are discussed with particular emphasis on oxidation and laser surface heating. C1 [Skinner, C. H.] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. [Coad, J. P.] Jet Joint Undertaking, Abingdon OX14 3EA, Oxon, England. [Federici, G.] ITER Garching Joint Work Site, Garching, Germany. RP Skinner, CH (reprint author), Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. EM cskinner@pppl.gov; federig@ipp.mpg.de NR 61 TC 35 Z9 35 U1 0 U2 3 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0031-8949 J9 PHYS SCRIPTA JI Phys. Scr. PY 2004 VL T111 BP 92 EP 97 DI 10.1238/Physica.Topical.111a00092 PG 6 WC Physics, Multidisciplinary SC Physics GA V63EZ UT WOS:000204271700015 ER PT J AU da Silva, AF Pepe, I Persson, C de Almeida, JS Araujo, CM Ahuja, R Johansson, B An, CY Guo, JH AF da Silva, A. Ferreira Pepe, I. Persson, C. de Almeida, J. Souza Araujo, C. Moyses Ahuja, R. Johansson, B. An, C. Y. Guo, J. -H. TI Optical properties of oxide compounds PbO, SnO2 and TiO2 SO PHYSICA SCRIPTA LA English DT Article AB The optical properties of the oxide compounds PbO and SnO2 have been investigated experimentally by transmission spectroscopy measurements and theoretically by a full-potential linearized augmented plane wave (FPLAPW) method. The dielectric functions of the rutile TiO2 has also been calculated. The calculated band-gap energies as well as the optical absorption were found to be in a very good qualitatively agreement with the experimental results. C1 [da Silva, A. Ferreira; Pepe, I.] Univ Fed Bahia, Inst Fis, BR-40210340 Salvador, BA, Brazil. [Persson, C.; de Almeida, J. Souza; Araujo, C. Moyses; Ahuja, R.; Johansson, B.] Uppsala Univ, Dept Phys, Condensed Matter Theory Grp, S-75121 Uppsala, Sweden. [An, C. Y.] INPE LAS, BR-12201970 Sao Jose Dos Campos, SP, Brazil. [Guo, J. -H.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. [Johansson, B.] Royal Inst Technol, Dept Mat Sci & Engn, SE-10044 Stockholm, Sweden. RP da Silva, AF (reprint author), Univ Fed Bahia, Inst Fis, Campus Univ Ondina, BR-40210340 Salvador, BA, Brazil. EM ferreira@fis.ufba.br RI de Almeida, Jailton Souza/A-8116-2008; Araujo, Moyses/L-6135-2013 OI de Almeida, Jailton Souza/0000-0002-4942-9460; Araujo, Moyses/0000-0001-5192-0016 NR 12 TC 21 Z9 21 U1 2 U2 6 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0031-8949 J9 PHYS SCRIPTA JI Phys. Scr. PY 2004 VL T109 BP 180 EP 183 PG 4 WC Physics, Multidisciplinary SC Physics GA V62QD UT WOS:000204233100024 ER PT J AU Ordas, N Garcia-Rosales, C Lindig, S Balden, M Wang, H AF Ordas, N. Garcia-Rosales, C. Lindig, S. Balden, M. Wang, H. TI Effect of catalytic graphitization on the thermo-mechanical properties of isotropic graphite doped with metallic carbides SO PHYSICA SCRIPTA LA English DT Article AB The influence of several graphitization parameters (temperature, dwell time, HIPing subsequent to graphitization) on the final properties of doped isotropic graphite has been investigated. The aim of this work is to obtain doped isotropic graphite with reduced chemical erosion by hydrogen bombardment, high thermal conductivity and large thermal shock resistance. As starting material, a self-sintering mesophase carbon powder and different metallic carbides (TiC, VC, ZrC and WC) as dopants has been used. Longer dwell time results in a remarkable increase of thermal conductivity, depending on the dopant and on the graphitization temperature. However, it leads also to carbide coarsening and local carbide agglomeration and thus to degradation of the mechanical properties. HIPing subsequent to graphitization leads to a significant reduction of porosity for the materials doped with VC and WC and thus to an improvement of their mechanical properties. A solid-liquid-solid model for metal catalysts can be applied to our experimental observations of graphitization in the presence of metallic carbides. C1 [Ordas, N.; Garcia-Rosales, C.] Univ Navarra, Ctr Estudios Invest Tecn Gipuzkoa, San Sebastian, Spain. [Ordas, N.; Garcia-Rosales, C.] Univ Navarra, Escuela Super Ingn, San Sebastian, Spain. [Lindig, S.; Balden, M.] EURATOM, Max Planck Inst Plasmaphys, D-85748 Garching, Germany. [Wang, H.] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Ordas, N (reprint author), Univ Navarra, Ctr Estudios Invest Tecn Gipuzkoa, San Sebastian, Spain. EM nordas@ceit.es NR 11 TC 12 Z9 12 U1 3 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0031-8949 J9 PHYS SCRIPTA JI Phys. Scr. PY 2004 VL T111 BP 190 EP 194 PG 5 WC Physics, Multidisciplinary SC Physics GA V63EZ UT WOS:000204271700033 ER PT J AU Timmermans, E AF Timmermans, Eddy TI Progress and prospects of fermi gas physics in cold atom traps SO PHYSICA SCRIPTA LA English DT Article AB The pursuit of fermion superfluidity in cold atom traps has been touted as a worthy successor to the celebrated quest for Bose-Einstein condensation. Presently, the field appears to be closing in on this new target. This manuscript reviews some of the exciting prospects, the obstacles on the way, and the progress in overcoming these hurdles. C1 Los Alamos Natl Lab, T Div, Los Alamos, NM 87545 USA. RP Timmermans, E (reprint author), Los Alamos Natl Lab, T Div, T-4, Los Alamos, NM 87545 USA. NR 59 TC 3 Z9 3 U1 0 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0031-8949 J9 PHYS SCRIPTA JI Phys. Scr. PY 2004 VL T110 BP 302 EP 307 DI 10.1238/Physica.Topical.110a00302 PG 6 WC Physics, Multidisciplinary SC Physics GA V63EY UT WOS:000204271600053 ER PT J AU Meyer, FW Krause, HF Morozov, VA Vane, CR Vergara, LI AF Meyer, F. W. Krause, H. F. Morozov, V. A. Vane, C. R. Vergara, L. I. TI Site-specific neutralization of slow multicharged ions incident on solid surfaces SO PHYSICA SCRIPTA LA English DT Article AB Recent measurements of projectile neutralization during 120 degrees binary collision backscattering from Au(110) and RbI(100), performed at the ORNL Multicharged Ion Research Facility, are described. A common feature of the Au(110) and RbI(100) results is that the observed scattered charge state distributions show significant dependences on the target azimuthal orientation, even for normal or close to normal incidence conditions. The observed target azimuth dependences originate in part from the fact that for the 120 degrees backscattering geometry, quasi-binary double collisions make significant contributions to the total binary scattering collision flux. For the Au(110) target, the types of possible quasi-binary collisions vary with target azimuth because of the corrugation of the reconstructed surface and the number of layers of atoms exposed in a (110) fcc lattice. For the RbI(100) surface, quasi-binary collisions vary with azimuth because of the ordered, two-component nature of the surface even when scattering from deeper layers is blocked. Sample data for few-keV incident F, Ne, and Ar multicharged incident projectiles are presented to illustrate the underlying concepts. C1 [Meyer, F. W.; Krause, H. F.; Morozov, V. A.; Vane, C. R.; Vergara, L. I.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Meyer, FW (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. EM meyerfw@ornl.gov NR 14 TC 4 Z9 4 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0031-8949 J9 PHYS SCRIPTA JI Phys. Scr. PY 2004 VL T110 BP 403 EP 407 DI 10.1238/Physica.Topical.110a00403 PG 5 WC Physics, Multidisciplinary SC Physics GA V63EY UT WOS:000204271600073 ER PT J AU Collins, LA Mazevet, S Kress, JD Schneider, BI Feder, DL AF Collins, Lee A. Mazevet, Stephane Kress, Joel D. Schneider, Barry I. Feder, David L. TI Time-dependent simulations of large-scale quantum dynamics SO PHYSICA SCRIPTA LA English DT Article AB We present a progress report on the use of large-scale time-dependent simulations methods to address an extensive variety of problems in atomic, molecular, and optical physics. This includes identification of relevant problems, a short summary of methods, and a few representative examples. C1 [Collins, Lee A.; Mazevet, Stephane; Kress, Joel D.] Los Alamos Natl Lab, T Div, Los Alamos, NM 87545 USA. [Schneider, Barry I.] Natl Sci Fdn, Div Phys, Arlington, VA 22230 USA. [Schneider, Barry I.] Natl Inst Stand & Technol, Div Electron & Opt Phys, Gaithersburg, MD 20899 USA. [Feder, David L.] Univ Calgary, Dept Phys & Astron, Calgary, AB T2N 1N4, Canada. RP Collins, LA (reprint author), Los Alamos Natl Lab, T Div, POB 1663, Los Alamos, NM 87545 USA. EM lac@lane.gov NR 43 TC 5 Z9 5 U1 1 U2 2 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0031-8949 EI 1402-4896 J9 PHYS SCRIPTA JI Phys. Scr. PY 2004 VL T110 BP 408 EP 412 DI 10.1238/Physica.Topical.110a00408 PG 5 WC Physics, Multidisciplinary SC Physics GA V63EY UT WOS:000204271600074 ER PT J AU Yoshida, S Reinhold, CO Persson, E Burgdorfer, J Tannian, BE Stokely, CL Dunning, FB AF Yoshida, S. Reinhold, C. O. Persson, E. Burgdoerfer, J. Tannian, B. E. Stokely, C. L. Dunning, F. B. TI Tailoring and controlling wave packets in multi-photon atom collisions SO PHYSICA SCRIPTA LA English DT Article AB Localization and manipulation of Rydberg wave packets using half cycle pulses are discussed. Rydberg wave packets can be localized by applying a train of half-cycle pulses equispaced in time. The localization in this "kicked'' Rydberg atom can be due to trapping the wave packet inside the stable islands seen in the classical mixed phase space structure, or the scarred wave function representing quantum mechanical localization while the classical atoms show fast ionization. Chirping the frequency of a train of pulses and modulating the kick strength modify the phase space structure in time and the localized wave packet can be driven to the preferred location in phase space by properly adjusting the time evolution of the phase space structure. C1 [Yoshida, S.; Persson, E.; Burgdoerfer, J.] Vienna Univ Technol, Inst Theoret Phys, A-1040 Vienna, Austria. [Reinhold, C. O.] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. [Tannian, B. E.; Stokely, C. L.; Dunning, F. B.] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA. [Tannian, B. E.; Stokely, C. L.; Dunning, F. B.] Rice Univ, Rice Quantum Inst, Houston, TX 77005 USA. RP Yoshida, S (reprint author), Vienna Univ Technol, Inst Theoret Phys, A-1040 Vienna, Austria. EM shuhei@concord.itp.tuwien.ac.at OI Reinhold, Carlos/0000-0003-0100-4962 NR 16 TC 1 Z9 1 U1 1 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0031-8949 J9 PHYS SCRIPTA JI Phys. Scr. PY 2004 VL T110 BP 424 EP 428 DI 10.1238/Physica.Topical.110a00424 PG 5 WC Physics, Multidisciplinary SC Physics GA V63EY UT WOS:000204271600077 ER PT J AU Mokler, PH Dunford, RW AF Mokler, PH Dunford, RW TI Two-photon decay in heavy atoms and ions SO PHYSICA SCRIPTA LA English DT Editorial Material ID INNER-SHELL TRANSITIONS; SINGLY IONIZED HELIUM; CONSISTENT-FIELD CALCULATION; HARTREE-FOCK APPROXIMATION; ONE-ELECTRON ATOMS; METASTABLE STATE; HYDROGENIC ATOMS; RADIATIVE DECAY; 22S1/2 STATE; 2 S-1(0) AB We review the status of and comment on current developments in the field of two-photon decay in atomic physics research. Recent work has focused on two photon decays in highly-charged ions and two-photon decay of inner-shell vacancies in heavy neutral atoms. We emphasize the importance of measuring the shape of the continuum emission in two-photon decay as a probe of relativistic effects in the strong central fields found in heavy atomic systems. New experimental approaches and their consequences will be discussed. C1 GSI Darmstadt, D-64291 Darmstadt, Germany. Argonne Natl Lab, Argonne, IL 60439 USA. RP GSI Darmstadt, D-64291 Darmstadt, Germany. NR 83 TC 31 Z9 31 U1 1 U2 5 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0031-8949 EI 1402-4896 J9 PHYS SCRIPTA JI Phys. Scr. PD JAN PY 2004 VL 69 IS 1 BP C1 EP C9 DI 10.1238/Physica.Regular.069a000C1 PG 9 WC Physics, Multidisciplinary SC Physics GA 767BY UT WOS:000188421400013 ER PT J AU Arce, A Fornasiero, F Rodriguez, O Radke, CJ Prausnitz, JM AF Arce, A Fornasiero, F Rodriguez, O Radke, CJ Prausnitz, JM TI Sorption and transport of water vapor in thin polymer films at 35 degrees C SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID SOLVENT SYSTEMS; DIFFUSION; POLYAMIDE; MEMBRANES; SERIES AB Using a gravimetric technique, experimental data at 35degreesC are reported for isothermal sorption equilibria and sorption kinetics of water vapor in poly(N,N-dimethyl methacrylamide) (PDMAA), poly(2-dimethyl aminoethyl methacrylate) (PDMAEMA), poly(acrylic acid) (PAA), and in a typical membrane of a commercial soft-contact lens made of poly(2-hydroxyethyl methacrylate) (PHEMA). The highest sorption of water vapor is in PDMAA. The Flory-Huggins model and the Zimm-Lundberg clustering theory are used to interpret the equilibrium data. Over the entire range of water activity, the four materials show clustering functions larger than -1 indicating that water molecules cluster together in the polymers. The least hydrophilic polymer, PDMAEMA, and the most hydrophilic one, PDMAA, show respectively, the highest and the lowest tendency of water molecules to form clusters. Water diffusion into the polymer matrix is faster in PDMAEMA (diffusion coefficient, D = 10-20 x 10(-8) cm(2) s(-1)) and in PDMAA (D = 4.9-8.7 x 10(-8) cm(2) s(-1)) than in PHEMA-lens material (D = 0.55-3.4 x 10(-8) cm(2) s(-1)) and PAA (D = 0.98-3.5 x 10(-8) cm(2) s(-1)). The measured diffusion coefficients increase with water activity in the PHEMA-lens, decrease with activity in PDMAEMA, and show a more complex concentration dependence in PDMAA and PAA. By writing the diffusion coefficient as a product of an intrinsic mobility, D, and a non-ideality thermodynamic factor, Gamma, the concentration dependence of D is explained by the interplay of two factors: rising plasticization with water activity, which causes an increase in D, and the effect of composition on Gamma, decreasing with water activity. C1 Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. Univ Santiago de Compostela, Dept Chem Engn, Santiago De Compostela 15782, Spain. RP Prausnitz, JM (reprint author), Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA. RI Rodriguez, Oscar/E-5255-2011; Arce, Alberto/G-2873-2011; Fornasiero, Francesco/I-3802-2012 OI Rodriguez, Oscar/0000-0002-8416-8534; NR 29 TC 35 Z9 35 U1 1 U2 15 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 2004 VL 6 IS 1 BP 103 EP 108 DI 10.1039/b307996a PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 755YA UT WOS:000187438000016 ER PT J AU Liu, HZ Klein, W Sani, A Jansen, M AF Liu, HZ Klein, W Sani, A Jansen, M TI Pressure induced phase transition and amorphization of Na3ONO2 SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID DIFFRACTION; NITRITE; NA3NO3 AB The high pressure behavior of Na3ONO2 has been investigated by Raman spectroscopy and angle-dispersive X-ray diffraction from synchrotron radiation by using the diamond anvil cell technique. Pressure induced phase transitions and finally amorphization are observed. Starting from cubic symmetry at ambient conditions Na3ONO2 transforms to a rhombohedral high pressure phase at 0.7 GPa. Beyond 14.1 GPa, the crystalline structure destabilizes and amorphous state is achieved. C1 Max Planck Inst Solid State Res, D-70569 Stuttgart, Germany. Argonne Natl Lab, Adv Photon Source, High Pressure CAT, Argonne, IL 60439 USA. European Synchrotron Radiat Facil, Beam Line ID9, F-38045 Grenoble, France. RP Liu, HZ (reprint author), Max Planck Inst Solid State Res, Heisenbergstr 1, D-70569 Stuttgart, Germany. EM hliu@hpcat.aps.anl.gov RI Liu, Haozhe/E-6169-2011 NR 15 TC 9 Z9 9 U1 0 U2 3 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 2004 VL 6 IS 5 BP 881 EP 883 DI 10.1039/b312984e PG 3 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 778JL UT WOS:000189236000003 ER PT J AU Ras, RHA Nemeth, J Johnston, CT DiMasi, E Dekany, I Schoonheydt, RA AF Ras, RHA Nemeth, J Johnston, CT DiMasi, E Dekany, I Schoonheydt, RA TI Hybrid Langmuir-Blodgett monolayers containing clay minerals: effect of clay concentration and surface charge density on the film formation SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID ATOMIC-FORCE MICROSCOPY; AIR-WATER-INTERFACE; METHYLENE-BLUE; LAYER CHARGE; ALKYLAMMONIUM CATIONS; RHODAMINE-B; DYE; SAPONITE; SMECTITE; ORIENTATION AB To control the properties of hybrid organo-clay films prepared by the Langmuir-Blodgett (LB) method, the film formation mechanism should be understood. This work aimed to understand what occurs at the air - water interface after the spreading of cationic surfactants (octadecyl rhodamine B, 3,3'-dioctadecyl oxacarbocyanine) on aqueous dispersions of smectite clay minerals ( saponite, montmorillonite, hectorite, laponite), resulting in hybrid organo-clay films. Information on the amount of surfactant molecules and clay particles in the hybrid films was obtained with surface pressure versus molecular area isotherms, attenuated total reflection infrared spectroscopy, ultraviolet-visible spectroscopy and atomic force microscopy. X-ray reflectivity measurements indicated that the surfactant molecules had adsorbed on only one side of the clay mineral lamella. With increasing clay concentration of the dispersion, the isotherms shifted to a lower lift-off area, a minimum lift-off area (MLA) was reached and then the lift-off area increased again. Films made at lower than the MLA clay concentration consisted of two phases: an organic phase and a hybrid organo-clay phase. Films made at the MLA clay concentration consisted of dense monolayers of the surfactant molecules and single clay mineral lamellae. The density of the surfactant molecules was highly correlated with the surface charge density of the clay minerals. These films had low water content. Films made at higher than the MLA clay concentration contained less surfactant, aggregates of the clay mineral particles, residual Na+ ions and water. With the clay concentration of the dispersion and the surface charge density of the clay mineral, the properties of hybrid organo-clay LB films can be adjusted. C1 Katholieke Univ Leuven, Ctr Oppervlaktechem Katalyse, B-3001 Louvain, Belgium. Univ Szeged, Dept Colloid Chem, H-6720 Szeged, Hungary. Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA. Brookhaven Natl Lab, Natl Synchrotron Light Source Dept, Upton, NY 11973 USA. RP Schoonheydt, RA (reprint author), Katholieke Univ Leuven, Ctr Oppervlaktechem Katalyse, Kasteelpk Arenberg 23, B-3001 Louvain, Belgium. EM robert.schoonheydt@agr.kuleuven.ac.be RI Ras, Robin/F-7680-2010; Johnston, Cliff/B-2215-2009 OI Ras, Robin/0000-0002-2076-242X; Johnston, Cliff/0000-0002-8462-9724 NR 48 TC 36 Z9 37 U1 0 U2 11 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 2004 VL 6 IS 16 BP 4174 EP 4184 DI 10.1039/b405862c PG 11 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 845FL UT WOS:000223222500015 ER PT J AU Augustsson, A Herstedt, M Guo, JH Edstrom, K Zhuang, GV Ross, PN Rubensson, JE Nordgren, J AF Augustsson, A Herstedt, M Guo, JH Edstrom, K Zhuang, GV Ross, PN Rubensson, JE Nordgren, J TI Solid electrolyte interphase on graphite Li-ion battery anodes studied by soft X-ray spectroscopy SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID ABSORPTION FINE-STRUCTURE; RESONANT INELASTIC-SCATTERING; PHOTOELECTRON-SPECTROSCOPY; CHEMICAL-COMPOSITION; PROPYLENE CARBONATE; UNDULATOR BEAMLINE; BAND-STRUCTURE; LITHIUM; EDGE; SEI AB We have measured X-ray absorption and emission near the C 1s edge of graphite electrodes cycled in lithium-ion battery cells. Resonantly excited emission spectra of graphite electrodes exhibit features characteristic of both highly oriented pyrolytic graphite as well as polycrystalline graphite. Spectra of three electrodes cycled in two different electrolytes are presented and compared with spectra of the pristine electrode. A solid electrolyte interphase (SEI) was detected on the electrochemically cycled electrodes. By the use of selective excitation, resonant X-ray emission spectra of the SEI-species were obtained and compared to spectra of reference compounds. The SEI on the cycled graphite anode was shown to comprise lithium oxalate (Li2C2O4), lithium succinate (LiO2CCH2CH2CO2Li) and lithium methoxide (LiOCH3). C1 Univ Uppsala, Dept Phys, S-75121 Uppsala, Sweden. Univ Uppsala, Dept Chem Mat, S-75121 Uppsala, Sweden. Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Augustsson, A (reprint author), Univ Uppsala, Dept Phys, Box 530, S-75121 Uppsala, Sweden. EM andreas.augustsson@fysik.uu.se OI Augustsson, Andreas/0000-0002-9463-3700; Edstroem, Kristina/0000-0003-4440-2952 NR 32 TC 37 Z9 37 U1 1 U2 46 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 2004 VL 6 IS 16 BP 4185 EP 4189 DI 10.1039/b313434b PG 5 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 845FL UT WOS:000223222500016 ER PT J AU Oltedal, VM Borve, KJ Saethre, LJ Thomas, TD Bozek, JD Kukk, E AF Oltedal, VM Borve, KJ Saethre, LJ Thomas, TD Bozek, JD Kukk, E TI Carbon 1s photoelectron spectroscopy of six-membered cyclic hydrocarbons SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID VIBRATIONAL STRUCTURE; IONIZATION ENERGIES; 1S IONIZATION; CORE-HOLE; SPECTRUM; SI(111)-7X7; MOLECULES; LIFETIME; ACCURATE; METHANE AB The carbon 1s photoelectron spectra of cyclohexane, cyclohexene, 1,3-cyclohexadiene, and 1,4-cyclohexadiene have been measured. These have been analyzed in terms of a theoretical model of the vibronic structure that includes the effects of the changes in equilibrium geometry that accompany core ionization as well as those of vibronic coupling in the core-ionized molecule. This theoretical approach gives an excellent description of the vibronic structure and makes it possible to identify the contributions of the inequivalent carbon atoms to the spectra. The carbon 1s ionization energies are reported and used in the analysis of photoelectron spectra of adsorbed molecules. C1 Univ Bergen, Dept Chem, NO-5007 Bergen, Norway. Oregon State Univ, Dept Chem, Corvallis, OR 97330 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. Univ Oulu, Dept Phys Sci, FIN-90014 Oulu, Finland. RP Borve, KJ (reprint author), Univ Bergen, Dept Chem, NO-5007 Bergen, Norway. EM knut.borve@kj.uib.no RI Bozek, John/E-4689-2010; Borve, Knut/I-5934-2012; Bozek, John/E-9260-2010 OI Borve, Knut/0000-0002-5782-8963; Bozek, John/0000-0001-7486-7238 NR 33 TC 24 Z9 24 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 2004 VL 6 IS 17 BP 4254 EP 4259 DI 10.1039/b405109b PG 6 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 849CQ UT WOS:000223516700006 ER PT J AU Reinhard, BM Lagutschenkov, A Niedner-Schatteburg, G AF Reinhard, BM Lagutschenkov, A Niedner-Schatteburg, G TI Ab initio study of [Mg,nH(2)O](-) reactive decay products: structure and stability of magnesium oxide and magnesium hydroxide water cluster anions [MgO,(n-1)H2O](-), [HMgOH,(n-1)H2O](-) and [Mg(OH)(2),(n-2)H2O](-) SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID PHOTOELECTRON-SPECTROSCOPY; HYDRATED ELECTRON; BASIS-SETS; SOLVATION; IONS; LI; PHOTODISSOCIATION; MG+(H2O)(N); ENERGIES; CATIONS AB Geometrical as well as electronic structures of hydrated magnesium oxide and hydroxide anions with the stoichiometry [MgO,(n-1)H2O](-), [HMgOH,(n-1)H2O](-) and [Mg(OH)(2),(n-2)H2O](-) are investigated by ab initio calculations at the MP2 level of theory. Different structural archetypes emerge and the excess electron localization modes within them are elucidated. The oxidation state of the central Mg atom is found to correlate with the coordination number, which exhibits a strong influence on the localization mode of the excess electron. Only in [HMgOH,(n-1)H2O](-), n=1-2, and [Mg(OH)(2),(n-2) H2O](-), n=2-3, a valence bound state of the excess electron is favored, whereas for all larger cluster sizes the excess electron resides within the hydration shell and is localized by dangling O-H bonds. These act as molecular tweezers which trap the hydrated electron. The investigated magnesium oxide and hydroxide water cluster anions are discussed as potential products of a reactive decay of anionic magnesium water clusters [Mg, nH(2)O](-), elucidating the chemical reactivity of these species. The minimum energy pathway of the O-H insertion by Mg in [Mg, nH(2)O](-) is investigated in detail. C1 Tech Univ Kaiserslautern, Fachbereich Chem, D-67663 Kaiserslautern, Germany. RP Reinhard, BM (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA. EM bmr@chemie.uni-kl.de; alagut@chemie.uni-kl.de; gns@chemie.uni-kl.de RI Niedner-Schatteburg, Gereon/B-8393-2011; Rothke, Anita/O-5447-2016; OI Niedner-Schatteburg, Gereon/0000-0001-7240-6673; Roethke, Anita/0000-0002-3963-5287 NR 30 TC 6 Z9 6 U1 0 U2 13 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 2004 VL 6 IS 17 BP 4268 EP 4275 DI 10.1039/b405747c PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 849CQ UT WOS:000223516700008 ER PT J AU Pizarro, SA Glatzel, P Visser, H Robblee, JH Christou, G Bergmann, U Yachandra, VK AF Pizarro, SA Glatzel, P Visser, H Robblee, JH Christou, G Bergmann, U Yachandra, VK TI Mn oxidation states in tri- and tetra-nuclear Mn compounds structurally relevant to photosystem II: MnK-edge X-ray absorption and K beta X-ray emission spectroscopy studies SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID OXYGEN-EVOLVING COMPLEX; PHOTOSYNTHETIC WATER OXIDATION; CENTERED MANGANESE COMPLEXES; CRYSTAL-STRUCTURES; FLUORESCENCE SPECTROSCOPY; MAGNETIC-PROPERTIES; LOCAL-STRUCTURE; CLUSTER; RESOLUTION; MECHANISM AB X-Ray spectroscopy is used to examine the effect of the manganese oxidation state for a series of Mn model compounds. Sensitive to Mn oxidation and structural symmetry, X-ray absorption and emission spectroscopy (XAS and XES) provide complementary insights. However, few benchmark examples of complexes with similar structures but in different oxidation states are available to evaluate data from unknown structures like the oxygen evolving complex (OEC) of Photosystem II (PSII). This study examines two types of compounds prepared in a variety of Mn oxidation states and which possess chemical structures with Mn-Mn interactions (similar to2.7 Angstrom and similar to3.3 Angstrom) that have been observed in the OEC. Model complexes with core compositions Mn3O and Mn4O2 contain combinations of Mn in either a reduced (II) or oxidized (III) state. Within each set of compounds, complexes with higher Mn oxidation states have absorption K-edge energy values that are higher (1.6-2.2 eV) than those of their more reduced counterparts. This trend is accordingly reversed in the Kbeta emission spectroscopy where the first moment energy values are lower (0.09-0.12 eV) for compounds with higher Mn oxidation states. We will discuss in detail, how these trends can be quantitatively used to characterize the effects of the Mn oxidation state as well as the surrounding ligand environment on the observed X-ray spectra. The results are discussed with respect to previously obtained data on different S-states of the OEC. C1 Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA. Lawrence Berkeley Lab, Melvin Calvin Lab, Phys Biosci Div, Berkeley, CA 94720 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. Univ Utrecht, Dept Inorgan Chem & Catalysis, NL-3584 CA Utrecht, Netherlands. Univ Florida, Dept Chem, Gainesville, FL 32611 USA. RP Bergmann, U (reprint author), Stanford Synchrotron Radiat Lab, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. EM bergmann@ssrl.slac.stanford.edu; VKYachandra@lbl.gov RI Glatzel, Pieter/E-9958-2010; Christou, George /A-3072-2014 OI Glatzel, Pieter/0000-0001-6532-8144; FU NIGMS NIH HHS [R01 GM055302, R56 GM055302] NR 40 TC 19 Z9 19 U1 0 U2 18 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 2004 VL 6 IS 20 BP 4864 EP 4870 DI 10.1039/b407513g PG 7 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 866EB UT WOS:000224755500019 PM 25383041 ER PT J AU Dosche, C Kumke, MU Lohmannsroben, HG Ariese, F Bader, AN Gooijer, C Miljanic, OS Iwamoto, M Vollhardt, KPC Puchta, R Hommes, NJRV AF Dosche, C Kumke, MU Lohmannsroben, HG Ariese, F Bader, AN Gooijer, C Miljanic, OS Iwamoto, M Vollhardt, KPC Puchta, R Hommes, NJRV TI Deuteration effects on the vibronic structure of the fluorescence spectra and the internal conversion rates of triangular [4]phenylene SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article ID CYCLOHEXATRIENE RING; CHEMICAL-SHIFTS; AROMATICITY; BIPHENYLENE; DENSITY; 1ST; HEXAETHYNYLBENZENE; DELOCALIZATION; PHENYLENES; <4>PHENYLENE AB Deuteration effects on the vibronic structure of the emission and excitation spectra of triangular [ 4] phenylene (D-3h [4]phenylene) were studied using laser-excited Shpol'skii spectroscopy (LESS) in an octane matrix at 4.2 K. For correct assignment of the vibrational modes, the experimental results were compared with calculated frequencies (B3LYP/6-31G*). CH vibrations were identified by their characteristic isotopic shifts in the spectra of deuterated triangular [4]phenylenes. Two CC stretching modes, at 100 cm(-1) and 1176 cm(-1), suitable as probes for bond strength changes in the excited state, were identified. The isotope effect on the internal conversion rates of triangular [4] phenylene was evaluated from measurements of temperature dependent lifetime. Isotope dependency and the magnitude of the internal conversion rates indicate that internal conversion in triangular [4] phenylene is most likely induced by CH vibrations. The results obtained by LESS and lifetime measurements were compared with PM3 PECI calculations of the excited state structure. The theoretical results and the relation between ground and excited state vibration energies of the 1176 cm(-1) probe vibration indicate a reduction of bond alternation of the central cyclohexatriene ring in the excited state. 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. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. Univ Erlangen Nurnberg, Comp Chem Ctr, D-91052 Erlangen, Germany. RP Lohmannsroben, HG (reprint author), Univ Potsdam, Inst Chem, Karl Liebknecht Str 24-25, D-14476 Golm, Germany. EM loeh@chem.uni-potsdam.de RI Puchta, Ralph/I-3356-2014; OI Puchta, Ralph/0000-0003-1370-3875; Ariese, Freek/0000-0002-8756-7223 NR 58 TC 10 Z9 10 U1 1 U2 13 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 2004 VL 6 IS 24 BP 5476 EP 5483 DI 10.1039/b414545c PG 8 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 877MB UT WOS:000225573600005 ER PT J AU Nicolini, C Thiyagarajan, P Winter, R AF Nicolini, C Thiyagarajan, P Winter, R TI Small-scale composition fluctuations and microdomain formation in lipid raft models as revealed by small-angle neutron scattering SO PHYSICAL CHEMISTRY CHEMICAL PHYSICS LA English DT Article; Proceedings Paper CT Annual Meeting of the Deutsche-Bunsen-Gesellschaft-fur-Physikalische-Chemie CY MAY 20-22, 2004 CL Dresden, GERMANY SP Deutsch Bunsen Gesell Phys Chem ID FREE STANDING BILAYERS; FLUORESCENCE MICROSCOPY; DOMAIN FORMATION; OUTER LEAFLET; MEMBRANES; MIXTURES; TRITON; SPECTROSCOPY; CHOLESTEROL; PROTEINS AB Substantial evidence has accumulated recently that in cell membranes composition fluctuations and microdomains exist, also referred to as rafts. The structure of ternary model raft lipid mixtures, such as sphingomyelin, cholesterol and DOPC (1,2-dioleoyl-sn-glycero-3-phosphatidylcholine) or POPC (1-palmitoyl-2-oleoyl-sn-glycero-3-phosphatidylcholine), was studied by small-angle neutron scattering using the H/D contrast variation technique. The lipid mixtures exhibit a Q(-3) power-law scattering, indicating the existence of composition fluctuations, which correspond to space-filling droplets with a broad size-distribution ranging from about 20 to 200 nm. No indications of critical-like concentration fluctuations are visible in the concentration and temperature range (15-60 degreesC) covered. The data clearly demonstrate the existence of microdomains in the model raft mixtures not only in the mum range as revealed by fluorescence microscopy, but also their existence over a large length scale down to the range of several nanometres. In addition, we were able to directly visualize the resistance of part of the lipid domains against non-ionic detergent (Triton X-100) in situ. C1 Univ Dortmund, Dept Chem, D-44227 Dortmund, Germany. Argonne Natl Lab, IPNS Div, Argonne, IL 60439 USA. RP Winter, R (reprint author), Univ Dortmund, Dept Chem, Otto Hahn Str 6, D-44227 Dortmund, Germany. OI Winter, Roland/0000-0002-3512-6928 NR 32 TC 20 Z9 21 U1 0 U2 3 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 2004 VL 6 IS 24 BP 5531 EP 5534 DI 10.1039/b408928f PG 4 WC Chemistry, Physical; Physics, Atomic, Molecular & Chemical SC Chemistry; Physics GA 877MB UT WOS:000225573600012 ER PT S AU Zhang, P Ding, SY Xu, Q Smith, S Rumbles, G Himmel, ME AF Zhang, P Ding, SY Xu, Q Smith, S Rumbles, G Himmel, ME BE Hartland, GV Zhu, XY TI Investigation of novel quantum dots/proteins/cellulose bioconjugate using NSOM and photoluminescence SO PHYSICAL CHEMISTRY OF INTERFACES AND NANOMATERIALS III SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Physical Chemistry of Interfaces and Nanomaterials III CY AUG 03-06, 2004 CL Denver, CO SP SPIE ID CDSE; SCAFFOLDIN; PROTEINS; DOTS AB We investigated the engineered bioconjugate of cadmium selenide core/zinc sulfide shell, (CdSe)ZnS, quantum dots (QDs) with genetically modified proteins using near-field scanning optical microscopy (NSOM). A genetically engineered protein polymer was expressed and purified from E. coli. The protein polymer was allowed to self-assemble to the bacterial microcrystalline cellulose surface through the cellulosic binding domain. QDs were then conjugated to the protein/cellulose assembly through interaction with the 6 x histidine tag on the protein. The transmitted near-field optical signals are collected and detected by both a PMT (near-field scanning optical microscopy, NSOM) and a spectrometer (near-field scanning optical spectroscopy, NSOS). Results from the sample containing the QDs/protein/cellulose assemblies suggest that QDs were arrayed along the cellulose surface. The near-field spectroscopic study also showed that the slight change of spectroscopic properties of the QDs upon bioconjugation, indicating the strong interaction between the constructed protein and QDs. C1 Natl Renewable Energy Lab, Ctr Basic Sci, Golden, CO 80401 USA. RP Zhang, P (reprint author), Natl Renewable Energy Lab, Ctr Basic Sci, Golden, CO 80401 USA. OI Rumbles, Garry/0000-0003-0776-1462 NR 10 TC 0 Z9 0 U1 1 U2 2 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5451-6 J9 P SOC PHOTO-OPT INS PY 2004 VL 5513 BP 137 EP 144 DI 10.1117/12.560231 PG 8 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA BBH56 UT WOS:000225561900015 ER PT J AU Malakyan, YP Rochester, SM Budker, D Kimball, DF Yashchuk, VV AF Malakyan, YP Rochester, SM Budker, D Kimball, DF Yashchuk, VV TI Nonlinear magneto-optical rotation of frequency-modulated light resonant with a low-J transition SO PHYSICAL REVIEW A LA English DT Article ID ELECTRIC-DIPOLE MOMENT; LASER; MAGNETOMETERS; HG-199 AB A low-light-power theory of nonlinear magneto-optical rotation of frequency-modulated light resonant with a J = 1 --> J' = 0 transition is presented. The theory is developed for a Doppler-free transition and then modified to account for Doppler broadening and velocity mixing due to collisions. The results of the theory are shown to be in qualitative agreement with experimental data obtained for the rubidium D I line. C1 Natl Acad Sci Armenia, Inst Phys Res, Ashtarak 2 378410, Armenia. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Malakyan, YP (reprint author), Natl Acad Sci Armenia, Inst Phys Res, Ashtarak 2 378410, Armenia. EM yumal@ipr.sci.am; simonkeys@yahoo.com; budker@socrates.berkeley.edu; dfk@uclink4.berkeley.edu; yashchuk@socrates.berkeley.edu NR 24 TC 29 Z9 29 U1 2 U2 10 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 2004 VL 69 IS 1 AR 013817 DI 10.1103/PhysRevA.69.013817 PG 11 WC Optics; Physics, Atomic, Molecular & Chemical SC Optics; Physics GA 779MQ UT WOS:000189304700085 ER PT J AU Ahn, KH Graf, MJ Trugman, SA Demsar, J Averitt, RD Sarrao, JL Taylor, AJ AF Ahn, KH Graf, MJ Trugman, SA Demsar, J Averitt, RD Sarrao, JL Taylor, AJ TI Ultrafast quasiparticle relaxation dynamics in normal metals and heavy-fermion materials SO PHYSICAL REVIEW B LA English DT Article ID PHONON ENERGY RELAXATION; FEMTOSECOND SPECTROSCOPY; ELECTRON; DENSITY; MODEL; TIME; AG AB We present a detailed theoretical study of the ultrafast quasiparticle relaxation dynamics observed in normal metals and heavy-fermion materials with femtosecond time-resolved optical pump-probe spectroscopy. For normal metals, a nonthermal electron distribution gives rise to a temperature- (T) independent electron-phonon relaxation time at low temperatures, in contrast to the T-3-divergent behavior predicted by the two-temperature model. For heavy-fermion compounds, we find that the blocking of electron-phonon scattering for heavy electrons within the density-of-states peak near the Fermi energy is crucial to explain the rapid increase of the electron-phonon relaxation time below the Kondo temperature. We propose the hypothesis that the slower Fermi velocity compared to the sound velocity provides a natural blocking mechanism due to energy and momentum-conservation laws. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Ahn, KH (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Demsar, Jure/B-5578-2008; Demsar, Jure/F-7243-2016 OI Demsar, Jure/0000-0003-4551-7444; NR 22 TC 25 Z9 26 U1 2 U2 10 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 PY 2004 VL 69 IS 4 AR 045114 DI 10.1103/PhysRevB.69.045114 PG 9 WC Physics, Condensed Matter SC Physics GA 775RV UT WOS:000189075200033 ER PT J AU Bang, Y Graf, MJ Balatsky, AV Thompson, JD AF Bang, Y Graf, MJ Balatsky, AV Thompson, JD TI Nuclear spin-lattice relaxation rate in the d-wave superconducting state with coexisting antiferromagnetism SO PHYSICAL REVIEW B LA English DT Article ID MEAN-FIELD; FERMION; MAGNETISM; METALS AB We consider a general d-wave superconducting gap function in the presence of coexisting antiferromagnetic (AFM) long-range order. We find that the d-wave order parameter develops additional nodes without lowering the symmetry of the state due to the interplay of the superconducting and AFM correlations. This AFM correlated d-wave gap has a small gap structure inside the generic d-wave gap. As a result of this additional structure it shows quite a different response to impurities compared to a standard d-wave gap. We calculate the nuclear spin-lattice relaxation rate 1/T-1 of this gap in the presence of impurities and discuss the implications for the experiments of some AFM heavy-fermion superconductors, in particular CeRhIn5. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Chonnam Natl Univ, Dept Phys, Kwangju 500757, South Korea. RP Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 22 TC 18 Z9 18 U1 0 U2 0 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 PY 2004 VL 69 IS 1 AR 014505 DI 10.1103/PhysRevB.69.014505 PG 7 WC Physics, Condensed Matter SC Physics GA 771KQ UT WOS:000188784800069 ER PT J AU Barber, WC Ye, F Belanger, DP Fernandez-Baca, JA AF Barber, WC Ye, F Belanger, DP Fernandez-Baca, JA TI Magnetic vacancy percolation in dilute antiferromagnets SO PHYSICAL REVIEW B LA English DT Article ID FIELD ISING-MODEL; GLASS-LIKE BEHAVIOR; NEUTRON-SCATTERING; OPTICAL BIREFRINGENCE; SYSTEM FEXZN1-XF2; CRITICAL-DYNAMICS; THRESHOLD; PHASE; FE0.31ZN0.69F2; SUSCEPTIBILITY AB Neutron-scattering experiments at the magnetic vacancy percolation threshold concentration x(v), using the random-field Ising crystal Fe0.76Zn0.24F2, show stability of the transition to long-range order up to fields H=6.5 T. The observation of the stable long-range order corroborates the sharp boundary observed in computer simulations at x(v) separating equilibrium critical scattering behavior at high magnetic concentration from low concentration hysteretic behavior. Low-temperature H>0 scattering line shapes exhibit the dependence on the scattering wave vector expected for percolation threshold fractal structures. C1 Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA. Oak Ridge Natl Lab, Condensed Matter Sci Div, Oak Ridge, TN 37831 USA. RP Barber, WC (reprint author), Univ Calif Santa Cruz, Dept Phys, Santa Cruz, CA 95064 USA. RI Ye, Feng/B-3210-2010; Fernandez-Baca, Jaime/C-3984-2014 OI Ye, Feng/0000-0001-7477-4648; Fernandez-Baca, Jaime/0000-0001-9080-5096 NR 36 TC 9 Z9 9 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 PY 2004 VL 69 IS 2 AR 024409 DI 10.1103/PhysRevB.69.024409 PG 5 WC Physics, Condensed Matter SC Physics GA 773WJ UT WOS:000188947300051 ER PT J AU Beleggia, M AF Beleggia, M TI Electron-optical phase shift of a Josephson vortex SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; COLUMNAR DEFECTS; VORTICES; HOLOGRAPHY AB The possibility of directly observing Josephson vortices in a superconducting material by transmission electron microscopy is here investigated. First, the anisotropic London equation for the magnetic field of a Josephson vortex is solved in Fourier space. Then, from the knowledge of the magnetic field, the vector potential and the Aharonov-Bohm phase shift are derived. Finally, phase contrast image simulations are presented. It will be shown that, with current technology, the direct observation of a Josephson vortex is possible. C1 Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA. RP Beleggia, M (reprint author), Brookhaven Natl Lab, Dept Mat Sci, Upton, NY 11973 USA. NR 17 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 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD JAN PY 2004 VL 69 IS 1 AR 014518 DI 10.1103/PhysRevB.69.014518 PG 5 WC Physics, Condensed Matter SC Physics GA 771KQ UT WOS:000188784800082 ER PT J AU Blum, V Zunger, A AF Blum, V Zunger, A TI Structural complexity in binary bcc ground states: The case of bcc Mo-Ta SO PHYSICAL REVIEW B LA English DT Article ID PHASE-DIAGRAM; SYSTEMS; EQUILIBRIA; STABILITY; ALLOYS AB Traditional sorting diagrams for ground states (T=0 stable atomic configurations) of bcc-based binary alloys predict simple crystal structures when simple parametric interactions (e.g., first few pairs) are assumed. However, the range and magnitude of interactions for real systems is not a priori known, and could lead to much greater structural complexity. We combine a density functional theory based, deterministic mixed-basis cluster expansion with an exhaustive enumeration scheme of 3x10(6) possible structures to determine the ground states of the bcc alloy Mo-Ta. The result is a rich ground-state line, changing one's outlook on bcc structural stability. We find Mo-rich (100) superlattices (including C11(b) and B2) coexisting with complex large-cell structures (Mo(4)Ta(9) and Mo(4)Ta(12)). We demonstrate that a systematic cluster expansion construction scheme which includes both high-order pairs and many-body figures is a necessity to capture the ground states of Mo-Ta. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Blum, V (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. RI Zunger, Alex/A-6733-2013; Blum, Volker/J-6591-2012 OI Blum, Volker/0000-0001-8660-7230 NR 33 TC 42 Z9 42 U1 1 U2 4 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 PY 2004 VL 69 IS 2 AR 020103 DI 10.1103/PhysRevB.69.020103 PG 4 WC Physics, Condensed Matter SC Physics GA 773WJ UT WOS:000188947300003 ER PT J AU Bonev, SA Militzer, B Galli, G AF Bonev, SA Militzer, B Galli, G TI Ab initio simulations of dense liquid deuterium: Comparison with gas-gun shock-wave experiments SO PHYSICAL REVIEW B LA English DT Article ID EQUATION-OF-STATE; MOLECULAR-HYDROGEN; FLUID; DISSOCIATION; TRANSITION; DYNAMICS; HUGONIOT AB We present first-principles molecular-dynamics simulations of the equation of state of liquid deuterium up to eightfold compression and temperatures between 2000 and 20 000 K. We report significant technical improvements over previous density-functional calculations leading to excellent agreement with gas gun shock wave measurements, which have provided well established experimental data for the deuterium Hugoniot. The principal Hugoniot is further investigated by performing simulations with rigid deuterium molecules. We also compute the double-shock Hugoniot curve and compare calculated and measured reshock temperatures. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 32 TC 74 Z9 77 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 PY 2004 VL 69 IS 1 AR 014101 DI 10.1103/PhysRevB.69.014101 PG 6 WC Physics, Condensed Matter SC Physics GA 771KQ UT WOS:000188784800021 ER PT J AU Bud'ko, SL Morosan, E Canfield, PC AF Bud'ko, SL Morosan, E Canfield, PC TI Magnetic field induced non-Fermi-liquid behavior in YbAgGe single crystals SO PHYSICAL REVIEW B LA English DT Article ID HEAVY; SYSTEMS; RESISTIVITY; TRANSITION; ELECTRON; YB; CU AB Detailed anisotropic resistivity and heat-capacity measurements down to similar to0.4 K and up to 140 kOe are reported for a single crystalline YbAgGe. Based on these data YbAgGe, a member of the hexagonal RAgGe serie, can be classified as new, stoichiometric heavy-fermion compound with two magnetic ordering temperatures below 1 K and field-induced non-Fermi-liquid behavior above 45-70 kOe and 80-110 kOe for Hparallel toab and Hparallel toc, respectively. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. RP Iowa State Univ, Ames Lab, Ames, IA 50011 USA. RI Canfield, Paul/H-2698-2014 NR 30 TC 74 Z9 74 U1 3 U2 17 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 PY 2004 VL 69 IS 1 AR 014415 DI 10.1103/PhysRevB.69.014415 PG 8 WC Physics, Condensed Matter SC Physics GA 771KQ UT WOS:000188784800052 ER PT J AU Calzolari, A Marzari, N Souza, I Nardelli, MB AF Calzolari, A Marzari, N Souza, I Nardelli, MB TI Ab initio transport properties of nanostructures from maximally localized Wannier functions SO PHYSICAL REVIEW B LA English DT Article ID CARBON NANOTUBES; QUANTUM CONDUCTANCE; ELECTRONIC DEVICES; ATOMIC WIRES; GOLD ATOMS; MOLECULE; ENERGY; PSEUDOPOTENTIALS; NANOCONTACTS; TRANSISTORS AB We present a comprehensive first-principles study of the ballistic transport properties of low-dimensional nanostructures such as linear chains of atoms (Al, C) and carbon nanotubes in the presence of defects. An approach is introduced where quantum conductance is computed from the combination of accurate plane-wave electronic structure calculations, the evaluation of the corresponding maximally localized Wannier functions, and the calculation of transport properties by a real-space Green's function method based on the Landauer formalism. This approach is computationally very efficient, can be straightforwardly implemented as a post-processing step in a standard electronic-structure calculation, and allows us to directly link the electronic transport properties of a device to the nature of the chemical bonds, providing insight onto the mechanisms that govern electron flow at the nanoscale. C1 Univ Modena & Reggio Emilia, INFM S3, Natl Res Ctr Nanostruct & Biosyst Surfaces, I-41100 Modena, Italy. Univ Modena & Reggio Emilia, Dipartimento Fis, I-41100 Modena, Italy. MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA. Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA. N Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA. Oak Ridge Natl Lab, CCS CSM, Oak Ridge, TN 37831 USA. RP Calzolari, A (reprint author), Univ Modena & Reggio Emilia, INFM S3, Natl Res Ctr Nanostruct & Biosyst Surfaces, I-41100 Modena, Italy. RI Buongiorno Nardelli, Marco/C-9089-2009; Calzolari, Arrigo/B-8448-2015; Marzari, Nicola/D-6681-2016 OI Calzolari, Arrigo/0000-0002-0244-7717; Marzari, Nicola/0000-0002-9764-0199 NR 89 TC 145 Z9 145 U1 2 U2 18 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 PY 2004 VL 69 IS 3 AR 035108 DI 10.1103/PhysRevB.69.035108 PG 10 WC Physics, Condensed Matter SC Physics GA 773EB UT WOS:000188883800026 ER PT J AU Furukawa, Y Aizawa, K Kumagai, K Ullu, R Lascialfari, A Borsa, F AF Furukawa, Y Aizawa, K Kumagai, K Ullu, R Lascialfari, A Borsa, F TI Proton spin-lattice relaxation induced by quantum tunneling of the magnetization in the molecular nanomagnet Fe-8 SO PHYSICAL REVIEW B LA English DT Article ID IRON CLUSTER; MAGNETS; ANISOTROPY; COHERENCE; ACETATE AB We report the observation of the effect of the quantum tunneling of the magnetization in the molecular nanomagnet [Fe-8(N3C6H15)(6)O-2(OH)(12)].[Br-8.9H(2)O] (in short, Fe-8) on the proton spin-lattice relaxation rates (T-1(-1)) measured in single crystal Fe-8 at 1.5 K. When the external field is applied parallel to the magnetic easy axis of the molecular nanomagnet, T-1(-1) decreases monotonically, a behavior well explained in terms of the magnetization fluctuations due to spin-phonon interaction. On the other hand, a peak of T-1(-1) is observed as a function of transverse field for a value of H in the range 2.5-3.5 T. The position and shape of the peak depend upon the orientation of the field in the hard plane and the peak disappears as soon as a small out-of-plane magnetic-field component is introduced by misaligning the crystal. The experimental observations can be explained by considering the effect of the transverse field on the tunneling splitting whereby the peak of T-1(-1) is a direct consequence of the matching condition of the incoherent tunneling probability with the proton Larmor frequency. C1 Hokkaido Univ, Grad Sch Sci, Div Phys, Sapporo, Hokkaido 0600810, Japan. Dipartimento Fis A Volta, I-27100 Pavia, Italy. Unita INFM Pavia, I-27100 Pavia, Italy. Iowa State Univ, Ames Lab, Dept Phys & Astron, Ames, IA 50011 USA. RP Furukawa, Y (reprint author), Hokkaido Univ, Grad Sch Sci, Div Phys, Sapporo, Hokkaido 0600810, Japan. NR 21 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 1098-0121 J9 PHYS REV B JI Phys. Rev. B PD JAN PY 2004 VL 69 IS 1 AR 014405 DI 10.1103/PhysRevB.69.014405 PG 5 WC Physics, Condensed Matter SC Physics GA 771KQ UT WOS:000188784800042 ER PT J AU Gan, CK Sewell, TD Challacomb, M AF Gan, CK Sewell, TD Challacomb, M TI All-electron density-functional studies of hydrostatic compression of pentaerythritol tetranitrate C(CH2ONO2)(4) SO PHYSICAL REVIEW B LA English DT Article ID LINEAR SCALING COMPUTATION; EXCHANGE-CORRELATION MATRIX; MOLECULAR-DYNAMICS; SINGLE-CRYSTALS; FOCK MATRIX; SHOCK INITIATION; PETN; SENSITIVITY; HMX; ORIENTATION AB All-electron calculations of the hydrostatic compression of pentaerythritol tetranitrate C(CH2ONO2)(4) (PETN) crystal have been performed using density-functional theory with the PBE functional in conjunction with the 6-31G** Gaussian basis set. Full optimizations of the atomic positions and ratio of lattice parameters c/a for the tetragonal crystal were performed for eight volume ratios 0.65less than or equal toV/V(0)less than or equal to1.00, where V-0 is the equilibrium volume at zero pressure. The pressure, linear compressibilities of lattice parameters a and c, and c/a ratio as functions of volume ratio are in good agreement with experiment. It is observed that c/a decreases monotonically with compression until V/V-0=0.8, and then increases monotonically for all higher levels of compression considered. Changes in intramolecular coordinates and close intermolecular contact distances were studied as a function of compression. The results indicate essentially rigid-molecule compression for V/V-0>0.8, with the onset of significant intramolecular distortion for higher compressions. Predictions of the bulk modulus B-0 and its pressure derivative B-0(') were obtained using various equation of state fitting forms. Values for these quantities are compared to experiment and to the results of a preceding molecular simulation study of PETN based on an empirical force field. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Adv Comp Lab, Los Alamos, NM 87545 USA. RP Gan, CK (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM CKGan@LANL.gov; Sewell@LANL.gov; MChalla@LANL.gov RI Gan, Chee Kwan/D-7857-2011 NR 40 TC 26 Z9 26 U1 1 U2 4 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 PY 2004 VL 69 IS 3 AR 035116 DI 10.1103/PhysRevB.69.035116 PG 7 WC Physics, Condensed Matter SC Physics GA 773EB UT WOS:000188883800034 ER PT J AU Guziewicz, E Durakiewicz, T Butterfield, MT Olson, CG Joyce, JJ Arko, AJ Sarrao, JL Moore, DP Morales, L AF Guziewicz, E Durakiewicz, T Butterfield, MT Olson, CG Joyce, JJ Arko, AJ Sarrao, JL Moore, DP Morales, L TI Angle-resolved photoemission study of USb2: The 5f band structure SO PHYSICAL REVIEW B LA English DT Article ID CYLINDRICAL FERMI SURFACES; DILUTE MAGNETIC-ALLOYS; LARGE-N EXPANSION; PHOTOELECTRON-SPECTROSCOPY; SINGLE-CRYSTALS; ANDERSON MODEL; HEAVY FERMIONS; SYSTEMS; CHARACTER; STATES AB Single crystal antiferromagnetic USb2 was studied at 15 K by angle-resolved photoemission with an overall energy resolution of 24 meV. The measurements unambiguously show the dispersion of extremely narrow bands situated near the Fermi level. The peak at the Fermi level represents the narrowest feature observed in 5f-electron photoemission to date. The natural linewidth of the feature just below the Fermi level is not greater than 10 meV. Normal emission data indicate a three dimensional aspect to the electronic structure of this layered material. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland. Marie Curie Sklodowska Univ, Inst Phys, PL-20031 Lublin, Poland. Iowa State Univ, Ames Lab, Ames, IA 50011 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 34 TC 26 Z9 26 U1 1 U2 15 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 PY 2004 VL 69 IS 4 AR 045102 DI 10.1103/PhysRevB.69.045102 PG 8 WC Physics, Condensed Matter SC Physics GA 775RV UT WOS:000189075200021 ER PT J AU Han, SW Gardner, JS Booth, CH AF Han, SW Gardner, JS Booth, CH TI Structural properties of the geometrically frustrated pyrochlore Tb2Ti2O7 SO PHYSICAL REVIEW B LA English DT Article ID SPIN-GLASS PYROCHLORE; CRYSTAL-STRUCTURE; ANTIFERROMAGNET; Y2MO2O7; TEMPERATURE; LIQUID; YBA2CU3O7-DELTA; POLARIZATION; DEPENDENCE; DISORDER AB Although materials that exhibit nearest-neighbor-only antiferromagnetic interactions and geometrical frustration theoretically should not magnetically order in the absence of disorder, few such systems have been observed experimentally. One such system appears to be the pyrochlore Tb2Ti2O7. However, previous structural studies indicated that Tb2Ti2O7 is an imperfect pyrochlore. To clarify the situation, we performed neutron powder-diffraction (NPD) and x-ray absorption fine-structure (XAFS) measurements on samples that were prepared identically to those that show no magnetic order. The NPD measurements show that the long-range structure of Tb2Ti2O7 is well ordered with no structural transitions between 4.5 and 600 K. In particular, mean-squared displacements u(2)'s for each site follow a Debye model with no offsets. No evidence for Tb/Ti site interchange was observed within an upper limit of 2%. Likewise, no excess or deficiency in the oxygen stoichiometry was observed, within an upper limit of 2% of the nominal pyrochlore value. Tb L-III- and Ti K-edge XAFS measurements from 20 K to 300 K similarly indicate a well-ordered local structure. Other aspects of the structure are considered. We conclude that Tb2Ti2O7 has, within experimental error, an ideal, disorder-free pyrochlore lattice, thereby allowing the system to remain in a dynamic, frustrated spin state to the lowest observed temperatures. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Chem Sci, Berkeley, CA 94720 USA. Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Han, SW (reprint author), Chonbuk Natl Univ, Jeonju 561756, South Korea. EM swhan@mail.chonbuk.ac.kr; jason.gardner@nist.gov; chbooth@lbl.gov RI Gardner, Jason/A-1532-2013; Booth, Corwin/A-7877-2008 NR 38 TC 36 Z9 36 U1 1 U2 15 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 PY 2004 VL 69 IS 2 AR 024416 DI 10.1103/PhysRevB.69.024416 PG 7 WC Physics, Condensed Matter SC Physics GA 773WJ UT WOS:000188947300058 ER PT J AU Homes, CC Dordevic, SV Bonn, DA Liang, R Hardy, WN AF Homes, CC Dordevic, SV Bonn, DA Liang, R Hardy, WN TI Sum rules and energy scales in the high-temperature superconductor YBa2Cu3O6+x SO PHYSICAL REVIEW B LA English DT Article ID T-C SUPERCONDUCTORS; OPTICAL-PROPERTIES; CONDENSATION ENERGY; SINGLE-CRYSTALS; INPLANE ANISOTROPY; CHARGE DYNAMICS; SPECTRAL WEIGHT; KINETIC-ENERGY; AXIS; CONDUCTIVITY AB The Ferrell-Glover-Tinkham (FGT) sum rule has been applied to the temperature dependence of the in-plane optical conductivity of optimally doped YBa2Cu3O6.95 and underdoped YBa2Cu3O6.60. Within the accuracy of the experiment, the sum rule is obeyed in both materials. However, the energy scale omega(c) required to recover the full strength of the superfluid rho(s) in the two materials is dramatically different; omega(c)similar or equal to800 cm(-1) in the optimally doped system (close to twice the maximum of the superconducting gap 2Delta(0)), but omega(c)greater than or similar to5000 cm(-1) in the underdoped system. In both materials, the normal-state scattering rate close to the critical temperature is small, Gamma<2Delta(0), so that the materials are not in the dirty limit and the relevant energy scale for rho(s) in a BCS material should be twice the energy gap. The FGT sum rule in the optimally doped material suggests that the majority of the spectral weight of the condensate comes from energies below 2Delta(0), which is consistent with a BCS material in which the condensate originates from a Fermi-liquid normal state. In the underdoped material the larger energy scale may be a result of the non-Fermi-liquid nature of the normal state. The dramatically different energy scales suggest that the nature of the normal state creates specific conditions for observing the different aspects of what is presumably a central mechanism for superconductivity in these materials. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada. RP Homes, CC (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. EM homes@bnl.gov NR 65 TC 50 Z9 51 U1 0 U2 4 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 PY 2004 VL 69 IS 2 AR 024514 DI 10.1103/PhysRevB.69.024514 PG 9 WC Physics, Condensed Matter SC Physics GA 773WJ UT WOS:000188947300075 ER PT J AU Hunter, BA Kennedy, BJ Vogt, T AF Hunter, BA Kennedy, BJ Vogt, T TI Magnetostriction in a simple trivalent manganese perovskite SO PHYSICAL REVIEW B LA English DT Article ID X-RAY-DIFFRACTION; NEUTRON-DIFFRACTION; THERMAL-EXPANSION; TRANSITION; DENSITY; ANTIFERROMAGNETISM; TRIFLUORIDE; TRANSPORT; ORIGIN; FIELD AB We found an unusual negative thermal expansion in the simple perovskite MnF(3) below the Neel point, where the spins are ordered in an A-type magnetic structure. The structure of MnF(3) has been studied between 5 and 500 K using powder neutron and synchrotron diffraction. The structure remains monoclinic C2/c over the entire temperature range. We have found that the interplay of spin and orbital ordering is sufficient to result in a large positive magnetovolume effect without charge ordering. This expansion is reminiscent of the Invar effect observed in certain alloys. C1 Australian Nucl Sci & Technol Org, Menai, NSW 2234, Australia. Univ Sydney, Sch Chem, Heavy Met Res Ctr, Sydney, NSW 2006, Australia. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA. RP Hunter, BA (reprint author), Australian Nucl Sci & Technol Org, Private Mail Bag 1, Menai, NSW 2234, Australia. RI Vogt, Thomas /A-1562-2011 OI Vogt, Thomas /0000-0002-4731-2787 NR 32 TC 8 Z9 8 U1 1 U2 20 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 PY 2004 VL 69 IS 2 AR 020410 DI 10.1103/PhysRevB.69.020410 PG 4 WC Physics, Condensed Matter SC Physics GA 773WJ UT WOS:000188947300016 ER PT J AU Jennison, DR Schultz, PA Sullivan, JP AF Jennison, DR Schultz, PA Sullivan, JP TI Evidence for interstitial hydrogen as the dominant electronic defect in nanometer alumina films SO PHYSICAL REVIEW B LA English DT Article ID NORM-CONSERVING PSEUDOPOTENTIALS; TOTAL-ENERGY CALCULATIONS; MOLECULAR-DYNAMICS; TUNNEL-JUNCTIONS; OXIDE-FILMS; TRANSITION; SYSTEMS; SURFACE; GAS AB We provide experimental and first principles theoretical evidence that electron transport through alumina films on Al(111) occurs through electron tunneling mediated by interstitial (i.e., nonbonded) H defects within the 6-nm amorphous surface oxide. Experiments indicate field-assisted tunneling into a defect level near midgap in the oxide and conductance that increases with increasing H content. Using density functional theory, we find interstitial neutral H indeed produces a midgap trap. Moreover, with a negatively charged H, the full 1s(2) orbital is almost at the same mid-gap energy. This shows H- electron-electron interactions are well screened in this wide gap insulator and can mediate conduction. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM drjenni@sandia.gov NR 31 TC 33 Z9 33 U1 1 U2 10 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 PY 2004 VL 69 IS 4 AR 041405 DI 10.1103/PhysRevB.69.041405 PG 4 WC Physics, Condensed Matter SC Physics GA 775RV UT WOS:000189075200019 ER PT J AU Kashtanov, S Augustsson, A Luo, Y Guo, JH Sathe, C Rubensson, JE Siegbahn, H Nordgren, J Agren, H AF Kashtanov, S Augustsson, A Luo, Y Guo, JH Sathe, C Rubensson, JE Siegbahn, H Nordgren, J Agren, H TI Local structures of liquid water studied by x-ray emission spectroscopy SO PHYSICAL REVIEW B LA English DT Article ID HYDROGEN-BOND; ICE; H2O; DYNAMICS; SPECTRUM; ENERGY; DIMER AB The O Kalpha x-ray emission spectra of water clusters with different sizes and conformations embedded in a continuum medium are simulated. The calculations have successfully explained the experimental spectra of water in both gas and liquid phases. It is shown that the x-ray emission spectra are very sensitive to the local hydrogen bonding structures. Strong electron sharing between different water molecules is observed and its possible connection to the covalency of hydrogen bonding is discussed. The experimentally observed strong excitation energy dependence of the spectra has been interpreted in terms of the polarization and angular dependence for the gas phase, and in terms of variations of local hydrogen bonding structures for the liquid phase. C1 Royal Inst Technol, SCFAB, SE-10691 Stockholm, Sweden. Uppsala Univ, Dept Phys, SE-75237 Uppsala, Sweden. Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA. RP Royal Inst Technol, SCFAB, SE-10691 Stockholm, Sweden. EM luo@theochem.kth.se; jguo@lbl.gov RI Sathe, Conny/P-8139-2016; Luo, Yi/B-1449-2009; Agren, Hans/H-7715-2016 OI Sathe, Conny/0000-0001-7799-8575; Luo, Yi/0000-0003-0007-0394; NR 31 TC 60 Z9 60 U1 1 U2 1 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 PY 2004 VL 69 IS 2 AR 024201 DI 10.1103/PhysRevB.69.024201 PG 8 WC Physics, Condensed Matter SC Physics GA 773WJ UT WOS:000188947300033 ER PT J AU Kierfeld, J Vinokur, V AF Kierfeld, J Vinokur, V TI Lindemann criterion and vortex lattice phase transitions in type-II superconductors SO PHYSICAL REVIEW B LA English DT Article ID HIGH-TEMPERATURE SUPERCONDUCTORS; FLUX-LINE-LATTICE; HIGH-TC SUPERCONDUCTORS; MONTE-CARLO-SIMULATION; MELTING TRANSITION; LAYERED SUPERCONDUCTORS; GLASS SUPERCONDUCTIVITY; THERMAL FLUCTUATIONS; TOPOLOGICAL ORDER; DIRECTED POLYMERS AB We discuss the destruction of vortex lattice order in type-II superconductors by random point pinning and thermal fluctuations based on Lindemann criteria. The location of the melting line and the order-disorder transition, which marks the destruction of the topologically ordered Bragg glass phase and is the reason for the second peak effect, is calculated. We focus on a comparative discussion of different versions of Lindemann criteria and, with regard to experiment, on a comparative discussion of three classes of type-II superconductors-low-T-c, anisotropic high-T-c, and layered high-T-c materials. Specific attention is paid to the role of nonlocal magnetic interlayer couplings and the softening of elastic moduli at high magnetic fields, which is crucial for low-T-c materials. We also discuss in detail the competing mechanisms of thermal depinning and temperature dependence of the pinning strength through microscopic parameters as well as the crossover between single vortex and bundle pinning for low-T-c materials. C1 Max Planck Inst Kolloid & Grenzflachenforsch, D-14424 Potsdam, Germany. Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Kierfeld, J (reprint author), Max Planck Inst Kolloid & Grenzflachenforsch, D-14424 Potsdam, Germany. RI Kierfeld, Jan/A-2659-2009 OI Kierfeld, Jan/0000-0003-4291-0638 NR 60 TC 57 Z9 58 U1 1 U2 4 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 PY 2004 VL 69 IS 2 AR 024501 DI 10.1103/PhysRevB.69.024501 PG 21 WC Physics, Condensed Matter SC Physics GA 773WJ UT WOS:000188947300062 ER PT J AU Kim, JS Moreno, NO Sarrao, JL Thompson, JD Stewart, GR AF Kim, JS Moreno, NO Sarrao, JL Thompson, JD Stewart, GR TI Field-induced non-Fermi-liquid behavior in Ce2IrIn8 SO PHYSICAL REVIEW B LA English DT Article ID HEAT; SUPERCONDUCTIVITY AB In zero field, Ce2IrIn8 obeys Landau's Fermi-liquid model, with a constant C/T of about 700 mJ/Ce mol K-2 below 0.7 K and a susceptibility that is constant to +/-4% below 4 K. In applied magnetic field, however, Ce2IrIn8 shows definite non-Fermi-liquid (nFl) behavior at similar to13 T, with C/Tsimilar toln T between 0.3 and 6 K, chisimilar toln T, and rho=rho(0)+AT(1). At fields of 17 T and higher there is a strong divergent upturn in C/T below 0.7 K that is approximately field independent and the susceptibility becomes again constant (Fermi-liquid like) below 6 K and decreases in magnitude at low temperature compared to chi (13 T). These results imply that a quantum critical point may exist in Ce2IrIn8 at similar to13 T. The magnetization at low temperature as a function of field of Ce2IrIn8 between 0.1 and 30 T shows no sign of an increase, or jump, near 13 T, but rather a change from Msimilar toH at lower fields to a more saturated behavior above 13 T. Thus, unlike previous field-induced nFl behavior, where the magnetic interactions responsible for the nFl behavior either came (i) at the field, H-metamag, where the magnetization showed a step at a metamagnetic transition (e.g., in UPt3 or in Sr3Ru2O7), or (ii) at the field where T-Neel in an antiferromagnet was suppressed to T=0 by the field (e.g., in CeCu6-xAgx), the present measurements point to a different kind of behavior. Thus the nFl behavior in Ce2IrIn8 may be describable as due to quantum criticality at the point in the phase diagram where field induces magnetism. Comparisons to other nFl systems, both field-induced and those which display an anomalous upturn in C/T at low temperatures, are made. C1 Univ Florida, Dept Phys, Gainesville, FL 32611 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Univ Florida, Dept Phys, Gainesville, FL 32611 USA. RI Moreno, Nelson/H-1708-2012 OI Moreno, Nelson/0000-0002-1672-4340 NR 14 TC 10 Z9 10 U1 0 U2 13 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 PY 2004 VL 69 IS 2 AR 024402 DI 10.1103/PhysRevB.69.024402 PG 4 WC Physics, Condensed Matter SC Physics GA 773WJ UT WOS:000188947300044 ER PT J AU Kumar, RS Kohlmann, H Light, BE Cornelius, AL Raghavan, V Darling, TW Sarrao, JL AF Kumar, RS Kohlmann, H Light, BE Cornelius, AL Raghavan, V Darling, TW Sarrao, JL TI Anisotropic elastic properties of CeRhIn5 SO PHYSICAL REVIEW B LA English DT Article ID HEAVY-FERMION SUPERCONDUCTIVITY; HIGH-PRESSURE; CEIRIN5; DEPENDENCE; CECU2GE2 AB The structure of the quasi-two-dimensional heavy fermion antiferromagnet CeRhIn5 has been investigated as a function of pressure up to 13 GPa using a diamond anvil cell under both hydrostatic and quasihydrostatic conditions at room (T=295 K) and low (T=10 K) temperatures. Complementary resonant ultrasound measurements were performed to obtain the complete elastic moduli. The bulk modulus (Bapproximate to78 GPa) and uniaxial compressibilities (kappa(a)=3.96x10(-3) GPa(-1) and kappa(c)=4.22x10(-3) GPa(-1)) found from pressure-dependent x-ray diffraction are in good agreement with the ultrasound measurements. Unlike doping on the Rh site where T-c increases linearly with the ratio of the tetragonal lattice parameters c/a, no such correlation is observed under pressure; instead, a double-peaked structure with a local minimum around 4-5 GPa is observed at both room and low temperatures. C1 Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA. Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. RP Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA. RI Cornelius, Andrew/A-9837-2008; Kohlmann, Holger/C-6244-2009 NR 33 TC 20 Z9 20 U1 0 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 PY 2004 VL 69 IS 1 AR 014515 DI 10.1103/PhysRevB.69.014515 PG 6 WC Physics, Condensed Matter SC Physics GA 771KQ UT WOS:000188784800079 ER PT J AU Li, MZ Evans, JW AF Li, MZ Evans, JW TI Growth coalescence shapes for islands during metal (100) homoepitaxy SO PHYSICAL REVIEW B LA English DT Article ID DIFFUSION-LIMITED AGGREGATION; PATTERN-FORMATION; ADATOM CAPTURE; FRACTAL GROWTH; SURFACES; EPITAXY; STEP; NANOSTRUCTURES; DEPENDENCE; EVOLUTION AB During submonolayer homoepitaxy, instability in the shapes of growing two-dimensional islands can develop due to the diffusion-limited aggregation of deposited adatoms at their edges. However, in metal (100) systems, periphery diffusion is typically efficient, quenching this shape instability, and resulting in simple near-square or near-rectangular shapes of isolated islands. Despite this feature, growth coalescence shapes resulting from collision of two or more growing islands are nontrivial. These coalescence shapes are elucidated here by developing three complementary formulations: (i) suitable atomistic lattice-gas models analyzed by kinetic Monte Carlo simulation; (ii) deterministic rate equations for the dynamics of kinks along island step edges; and (iii) continuum theories for step-edge evolution. Characterization of coalescence shapes is important as they affect interlayer transport during multilayer growth. Such a characterization is also necessary to enable coarse-grained modeling of film growth with a realistic treatment of the evolution of island edge morphologies, e.g., using level-set methods. C1 Iowa State Univ, Inst Phys Res & Technol, Ames, IA 50011 USA. Iowa State Univ, US DOE, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Math, Ames, IA 50011 USA. RP Li, MZ (reprint author), Iowa State Univ, Inst Phys Res & Technol, Ames, IA 50011 USA. NR 43 TC 8 Z9 8 U1 1 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 PY 2004 VL 69 IS 3 AR 035410 DI 10.1103/PhysRevB.69.035410 PG 14 WC Physics, Condensed Matter SC Physics GA 773EB UT WOS:000188883800093 ER PT J AU Light, BE Kumar, RS Cornelius, AL Pagliuso, PG Sarrao, JL AF Light, BE Kumar, RS Cornelius, AL Pagliuso, PG Sarrao, JL TI Heat capacity studies of Ce and Rh site substitution in the heavy-fermion antiferromagnet CeRhIn5: Short-range magnetic interactions and non-Fermi-liquid behavior SO PHYSICAL REVIEW B LA English DT Article ID SUPERCONDUCTIVITY; CEIRIN5 AB In heavy fermion materials superconductivity tends to appear when long-range magnetic order is suppressed by chemical doping or applying pressure. Here we report heat capacity measurements on diluted alloys of the heavy fermion superconductor CeRhIn5. Heat capacity measurements have been performed on CeRh1-yIryIn5 (yless than or equal to0.10) and Ce1-xLaxRhIn5 (xless than or equal to0.50) in applied fields up to 90 kOe to study the effect of doping and magnetic field on the magnetic ground state. The magnetic phase diagram of CeRh0.9Ir0.1In5 is consistent with the magnetic structure of CeRhIn5 being unchanged by Ir doping. Doping of Ir in small concentrations is shown to slightly increase the antiferromagnetic transition temperature T-N (T-N=3.8 K in the undoped sample). La doping which causes disorder on the Ce sublattice is shown to lower T-N with no long-range order observed above 0.34 K for Ce0.50La0.50RhIn5. Measurements on Ce0.50La0.50RhIn5 show a coexistence of short-range magnetic order and non-Fermi-liquid behavior. This dual nature of the Ce 4f electrons is very similar to the observed results on CeRhIn5 when long-range magnetic order is suppressed at high pressure. C1 Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA. Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA. RP Light, BE (reprint author), Univ Nevada, Dept Phys, Las Vegas, NV 89154 USA. RI Cornelius, Andrew/A-9837-2008; Pagliuso, Pascoal/C-9169-2012 NR 46 TC 17 Z9 17 U1 0 U2 8 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 PY 2004 VL 69 IS 2 AR 024419 DI 10.1103/PhysRevB.69.024419 PG 8 WC Physics, Condensed Matter SC Physics GA 773WJ UT WOS:000188947300061 ER PT J AU Llobet, A Gardner, JS Moshopoulou, EG Mignot, JM Nicklas, M Bao, W Moreno, NO Pagliuso, PG Goncharenko, IN Sarrao, JL Thompson, JD AF Llobet, A Gardner, JS Moshopoulou, EG Mignot, JM Nicklas, M Bao, W Moreno, NO Pagliuso, PG Goncharenko, IN Sarrao, JL Thompson, JD TI Magnetic structure of CeRhIn5 as a function of pressure and temperature SO PHYSICAL REVIEW B LA English DT Article ID HEAVY-FERMION SUPERCONDUCTIVITY; QUANTUM CRITICAL-POINT; UNCONVENTIONAL SUPERCONDUCTIVITY; CEIRIN5; ELECTRON; CECOIN5; CEIN3; ORDER; NQR AB We report magnetic neutron-diffraction and electrical resistivity studies on single crystals of the heavy-fermion antiferromagnet CeRhIn5 at pressures up to 2.3 GPa. These experiments show that the staggered moment of Ce and the incommensurate magnetic structure change weakly with applied pressure up to 1.63 GPa, where resistivity, specific heat and nuclear quadrupole resonance measurements confirm the presence of bulk superconductivity. This work places important constraints on an interpretation of the relationship between antiferromagnetism and unconventional superconductivity in CeRhIn5. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Natl Res Council Canada, NPMR, Chalk River Labs, Chalk River, ON K0J 1J0, Canada. Natl Ctr Sci Res Demokritos, Inst Mat Sci, Aghia Paraskevi 15310, Greece. CEA Saclay, CNRS, Leon Brillouin Lab, F-91191 Gif Sur Yvette, France. RP Llobet, A (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM allobet@lanl.gov RI Llobet, Anna/B-1672-2010; Pagliuso, Pascoal/C-9169-2012; Bao, Wei/E-9988-2011; Lujan Center, LANL/G-4896-2012; Moreno, Nelson/H-1708-2012; Gardner, Jason/A-1532-2013; Nicklas, Michael/B-6344-2008; Mignot, Jean-Michel/A-8305-2008 OI Bao, Wei/0000-0002-2105-461X; Moreno, Nelson/0000-0002-1672-4340; Nicklas, Michael/0000-0001-6272-2162; Mignot, Jean-Michel/0000-0001-8503-6712 NR 48 TC 69 Z9 70 U1 3 U2 26 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 PY 2004 VL 69 IS 2 AR 024403 DI 10.1103/PhysRevB.69.024403 PG 6 WC Physics, Condensed Matter SC Physics GA 773WJ UT WOS:000188947300045 ER PT J AU Lund, AC Nieh, TG Schuh, CA AF Lund, AC Nieh, TG Schuh, CA TI Tension/compression strength asymmetry in a simulated nanocrystalline metal SO PHYSICAL REVIEW B LA English DT Article ID MOLECULAR-DYNAMICS; MECHANICAL DEFORMATION; HYDROSTATIC-PRESSURE; PLASTIC-DEFORMATION; YIELD CRITERION; SHEAR BANDS; GLASS; NI; NANOSCALE; BEHAVIOR AB We explore asymmetries in the plastic deformation of idealized nanocrystalline nickel through static molecular simulations. We find that both the yield and flow stresses of these materials are higher in compression than in tension. This result is discussed in the context of earlier work on metallic glasses, and it is suggested that very similar atomic-level mechanisms control yield in both of these materials classes. C1 MIT, Ctr Mat Sci & Engn, Cambridge, MA 02139 USA. Lawrence Livermore Natl Lab, Div Mat Sci & Technol, Livermore, CA 94550 USA. RP Lund, AC (reprint author), MIT, Ctr Mat Sci & Engn, 77 Massachusetts Ave,Room 8-211, Cambridge, MA 02139 USA. RI Schuh, Christopher/C-7947-2009; Nieh, Tai-Gang/G-5912-2011 OI Nieh, Tai-Gang/0000-0002-2814-3746 NR 36 TC 48 Z9 48 U1 1 U2 18 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 PY 2004 VL 69 IS 1 AR 012101 DI 10.1103/PhysRevB.69.012101 PG 4 WC Physics, Condensed Matter SC Physics GA 771KQ UT WOS:000188784800001 ER PT J AU Nussinov, Z AF Nussinov, Z TI Avoided phase transitions and glassy dynamics in geometrically frustrated systems and non-Abelian theories SO PHYSICAL REVIEW B LA English DT Article ID DISCLINATION LINES; CRITICAL-BEHAVIOR; SPHERE PACKINGS; LANDAU THEORY; LIQUIDS; CRYSTALS; DEFECTS; ORDER AB We demonstrate that the application of any external uniform non-Abelian gauge background, no matter how small, leads to a greatly enhanced degeneracy. This degeneracy is so large that even a non-Abelian background field of infinitesimal strength leads to a shocking change in the thermodynamics. The critical temperature might be discontinuously depressed and an "avoided critical point" will emerge. We focus on how this arises in models previously employed to describe the microscopics of metallic glasses and correctly predicted the structure factor peaks. Some of the best fits, to date, to the dynamics of supercooled liquids were inspired by such notions for which we now provide a suggestive microscopic basis. We generalize the Mermin-Wagner inequality to high dimensions and discuss how extensive configurational entropy may be computed, by replica calculations, for a multitude of glass models (including non-Abelian gauge backgrounds). This extensive configurational entropy then allows a possible derivation of Vogel-Fulcher dynamics. We fortify earlier ideas suggesting avoided critical dynamics. C1 Leiden Univ, Inst Lorentz Theoret Phys, NL-2300 RA Leiden, Netherlands. RP Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. NR 39 TC 41 Z9 43 U1 2 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 PY 2004 VL 69 IS 1 AR 014208 DI 10.1103/PhysRevB.69.014208 PG 25 WC Physics, Condensed Matter SC Physics GA 771KQ UT WOS:000188784800032 ER PT J AU Ogi, H Fukunaga, M Hirao, M Ledbetter, H AF Ogi, H Fukunaga, M Hirao, M Ledbetter, H TI Elastic constants, internal friction, and piezoelectric coefficient of alpha-TeO2 SO PHYSICAL REVIEW B LA English DT Article ID RESONANCE ULTRASOUND SPECTROSCOPY; EFFECTIVE IONIC-RADII; TEMPERATURE-DEPENDENCE; PARATELLURITE TEO2; ACOUSTIC-RESONANCE; CRYSTAL-STRUCTURE; LITHIUM NIOBATE; SCATTERING; RAMAN; DYNAMICS AB We studied the interrelationship of elastic and piezoelectric properties with the lattice structure and crystal physics of paratellurite (alpha-TeO2). Tetragonal paratellurite (D-4(4),P422) shows six independent elastic constants C-ijkl, the associated internal friction Q(ijkl)(-1), and one piezoelectric coefficient e(14). We determined simultaneously these material coefficients using resonant ultrasound spectroscopy coupled with laser-Doppler interferometry. Mode identification, essential for success, was done by measuring the displacement distributions on a vibrating-specimen surface. Our C-ijkl were consistent with reported values measured by conventional methods. Our e(14) exceeds the reported value by 53%. We focus on several unusual elastic properties, including a negative Poisson ratio. Considering a star-shape truss structure on the basal plane consistently explains all of them. Internal friction correlates with the C-ijkl temperature derivatives, suggesting phonon-phonon interactions as a dominant cause of the mechanical loss. C1 Osaka Univ, Grad Sch Engn Sci, Osaka 5608531, Japan. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Ogi, H (reprint author), Osaka Univ, Grad Sch Engn Sci, Machikaneyama 1-3, Osaka 5608531, Japan. NR 32 TC 36 Z9 36 U1 1 U2 8 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 PY 2004 VL 69 IS 2 AR 024104 DI 10.1103/PhysRevB.69.024104 PG 8 WC Physics, Condensed Matter SC Physics GA 773WJ UT WOS:000188947300026 ER PT J AU Ramirez, R Colera, I Gonz lez, R Chen, Y Kokta, MR AF Ramirez, R Colera, I Gonz lez, R Chen, Y Kokta, MR TI Hydrogen-isotope transport induced by an electric field in alpha-Al2O3 single crystals SO PHYSICAL REVIEW B LA English DT Article ID ENHANCED DIFFUSION; INFRARED-SPECTRA; ALUMINUM OXIDE; ZINC-OXIDE; RADIATION; FUSION; MGO; DEUTERONS; CERAMICS; PROTONS AB Infrared-absorption measurements were used to characterize OH- and OD- stretching frequencies in Al2O3 crystals both nominally pure and doped with either Ti, V, or Mg impurities. Impurities, cooling rates, and ultraviolet irradiation affect the distribution of various OH- (OD-) band intensities. Polarization experiments determined the precise angle of OH- (OD-) ions protruding from the basal plane for several OH- (OD-) bands. Most were <15degrees, with one at 21degrees. Diffusion of isotopic species was performed with and without an electric field. Without an electric field, indiffusion is possible only by exchanging with an existing species. With an electric field, indiffusion occurs by exchange as well as occupying new sites. Incorporation of hydrogen (deuterium) was investigated by subjecting the crystals to a moderate electric field both parallel and perpendicular to the crystallographic c axis, in the temperature range 973-1300 K in H2O (or D2O) vapor. An initial linear dependence of the percent of exchange with annealing time and applied voltage was observed, indicating that ionic conduction is the dominant mechanism. The activation energy for the H(+)double left right arrowD(+) exchange was determined to be approximate to2.4 eV with an electric field of 3000 V/cm applied either parallel or perpendicular to the c axis. The estimated proton (deuteron) mobility is mu=(6+/-1)x10(-8) cm(2)/(V s). C1 Univ Carlos III Madrid, Escuela Politecn Super, Dept Fis, Madrid 28911, Spain. US DOE, Div Engn & Mat Sci, Off Basic Energy Sci, SC 13,Germantown Bldg,1000 Independence Ave SW, Washington, DC 20585 USA. St Gobain Crystals & Detectors, Washougal, WA 98671 USA. RP Ramirez, R (reprint author), Univ Carlos III Madrid, Escuela Politecn Super, Dept Fis, Ave Univ 30, Madrid 28911, Spain. RI Ramirez Jimenez, Rafael/I-1769-2015 NR 29 TC 6 Z9 6 U1 0 U2 7 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 PY 2004 VL 69 IS 1 AR 014302 DI 10.1103/PhysRevB.69.014302 PG 10 WC Physics, Condensed Matter SC Physics GA 771KQ UT WOS:000188784800035 ER PT J AU Smadici, S Mocuta, D Osgood, RM AF Smadici, S Mocuta, D Osgood, RM TI Lateral motion of image-state electrons for metal-adsorbate regions on stepped metal substrates SO PHYSICAL REVIEW B LA English DT Article ID SURFACE-STATES; POTENTIAL STATES; CONFINEMENT; NI(111); AG; SPECTROSCOPY; CU(111); CU(001); GROWTH AB We investigate the lateral motion of image-state electrons on two different bimetallic surfaces by using angle-resolved two-photon photoemission. To provide a clear, benchmarked system, measurements are first made on flat Ag/Pt(111) and Ag/Ni(111). Two stepped metallic surfaces Ag/Pt(997) and Ag/Ni(977) are then studied; a comparison of the results on the two surfaces allows a study of the behavior of image electrons on the Ag regions in the presence of different degrees of step regularity. In both systems a measurement of energy dispersion for image electrons moving in a direction perpendicular to steps shows that the energy shifts down and the effective mass decreases as the Ag coverage is increased. These results are compared to that expected using a Kronig-Penney-like surface potential. C1 Columbia Univ, Ctr Integrated Sci & Engn, New York, NY 10027 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Smadici, S (reprint author), Columbia Univ, Ctr Integrated Sci & Engn, New York, NY 10027 USA. NR 37 TC 8 Z9 8 U1 2 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 PY 2004 VL 69 IS 3 AR 035415 DI 10.1103/PhysRevB.69.035415 PG 13 WC Physics, Condensed Matter SC Physics GA 773EB UT WOS:000188883800098 ER PT J AU Sun, DY Asta, M Hoyt, JJ AF Sun, DY Asta, M Hoyt, JJ TI Kinetic coefficient of Ni solid-liquid interfaces from molecular-dynamics simulations SO PHYSICAL REVIEW B LA English DT Article ID EMBEDDED-ATOM-METHOD; DISALLOWED CRYSTAL-GROWTH; DENSITY-FUNCTIONAL THEORY; LENNARD-JONES SYSTEM; UNDERCOOLED MELTS; TRANSITION-METALS; PHASE-FIELD; SOLIDIFICATION; MODEL; CRYSTALLIZATION AB The kinetics of isothermal crystallization and melting are studied for elemental Ni employing non-equilibrium molecular-dynamics simulations based on interatomic potentials of the embedded-atom-method form. These simulations form the basis for calculations of the magnitude and crystalline anisotropy of the kinetic coefficient mu, defined as the constant of proportionality between interface velocity and undercooling. We obtain highly symmetric rates for crystallization and melting, from which we extract the following values of mu for low index {100}, {110}, and {111} interfaces: mu(100)=35.8+/-22, mu(110)=25.5+/-1.6, and mu(111)=24.1+/-4.0 in units of cm/s K. The results of the present study are discussed in the context of previous molecular-dynamics simulations for related systems, and kinetic models based upon transition-state and density-functional theories. C1 Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. Acad Sinica, Inst Solid State Phys, Hefei 230031, Peoples R China. RP Sun, DY (reprint author), Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA. RI Sun, Deyan/D-5088-2012 OI Sun, Deyan/0000-0002-9728-8017 NR 76 TC 59 Z9 60 U1 1 U2 23 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 PY 2004 VL 69 IS 2 AR 024108 DI 10.1103/PhysRevB.69.024108 PG 11 WC Physics, Condensed Matter SC Physics GA 773WJ UT WOS:000188947300030 ER PT J AU Sun, DY Asta, M Hoyt, JJ Mendelev, MI Srolovitz, DJ AF Sun, DY Asta, M Hoyt, JJ Mendelev, MI Srolovitz, DJ TI Crystal-melt interfacial free energies in metals: fcc versus bcc SO PHYSICAL REVIEW B LA English DT Article ID SOLID-LIQUID INTERFACE; STRUCTURAL MODEL; SURFACE-TENSION; PHASE SELECTION; NUCLEATION; ANISOTROPY; SPHERES; CRYSTALLIZATION; MICROSTRUCTURE; GLASSES AB The structural dependence of crystal-melt interfacial free energies (gamma) is investigated for fcc and bcc solids through molecular-dynamics calculations employing interatomic potentials for Fe. We compute approximate to30-35 % lower values of gamma for the bcc structure, and find that our results cannot be explained simply in terms of differences in latent heats (L) or densities (rho) for bulk bcc and fcc phases. We observe a strong structural dependence of the Turnbull coefficient alpha=gamma/Lrho(2/3), and find a trend towards lower crystalline anisotropies of gamma for the bcc structure relative to fcc. C1 Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. Princeton Univ, Dept Mech & Aerosp Engn, Princeton Mat Inst, Princeton, NJ 08544 USA. Acad Sinica, Inst Solid State Phys, Hefei 230031, Peoples R China. RP Sun, DY (reprint author), Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA. RI Sun, Deyan/D-5088-2012 OI Sun, Deyan/0000-0002-9728-8017 NR 35 TC 53 Z9 53 U1 3 U2 24 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 PY 2004 VL 69 IS 2 AR 020102 DI 10.1103/PhysRevB.69.020102 PG 4 WC Physics, Condensed Matter SC Physics GA 773WJ UT WOS:000188947300002 ER PT J AU Sun, H Ribeiro, FJ Li, JL Roundy, D Cohen, ML Louie, SG AF Sun, H Ribeiro, FJ Li, JL Roundy, D Cohen, ML Louie, SG TI Ab initio pseudopotential studies of equilibrium lattice structures and phonon modes of bulk BC3 SO PHYSICAL REVIEW B LA English DT Article ID TOTAL ENERGY; GRAPHITE; CONSTANTS; SOLIDS; C3B AB Different stacking arrangements of BC3 layered crystals are studied with the use of the ab initio pseudopotential density-functional method. The total energies, lattice constants, electron energy band structures and density of states, as well as phonon frequencies are calculated for the possible bulk BC3 structures obtained by full relaxations starting from different initial atomic configurations of ABAB (or ABCABC)... layer stacking. Two stable BC3 structures, one semiconductor and the other metal, are obtained, which have lower total energies comparing with those of the structures proposed previously. Our calculations show that except for these two BC3 structures, all the structures we studied, including the BC3 structures proposed previously, have imaginary phonon frequencies corresponding to the relative, parallel motion of the adjacent BC3 layers, indicating the instability of the layer stacking in these structures. C1 Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200030, Peoples R China. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Sun, H (reprint author), Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200030, Peoples R China. RI Sun, Hong/O-1206-2015 NR 21 TC 26 Z9 27 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 PY 2004 VL 69 IS 2 AR 024110 DI 10.1103/PhysRev.69.024110 PG 8 WC Physics, Condensed Matter SC Physics GA 773WJ UT WOS:000188947300032 ER PT J AU Velev, J Butler, WH AF Velev, J Butler, WH TI Effects of interface disorder on transmission probability in magnetic multilayer SO PHYSICAL REVIEW B LA English DT Article ID GIANT MAGNETORESISTANCE; ENHANCED MAGNETORESISTANCE; METALLIC MULTILAYERS AB We present a study of conductance through disordered Fe-Cr[100] and Co-Cu[100] interfaces within a realistic tight-binding model. In our model, the specular and diffuse parts of the conductance are treated on an equal footing. We observe a substantial increase in conductance due to disorder in the channels that are strongly reflected by pure interfaces. We also show how this phenomenon affects the giant magnetoresistance. In addition, we find that the series resistor model may significantly overestimate the resistance if the thickness of the disordered layer is less than several times the electron mean free path. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. Univ Alabama, Ctr Mat Informat Technol, Tuscaloosa, AL 35487 USA. RP Velev, J (reprint author), Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA. NR 16 TC 10 Z9 10 U1 0 U2 0 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 PY 2004 VL 69 IS 2 AR 024404 DI 10.1103/PhysRevB.69.024404 PG 7 WC Physics, Condensed Matter SC Physics GA 773WJ UT WOS:000188947300046 ER PT J AU Yu, SW Muller, N Heinzmann, U Pettenkofer, C Klein, A Blaha, P AF Yu, SW Muller, N Heinzmann, U Pettenkofer, C Klein, A Blaha, P TI Band symmetries of GaSe(0001) studied by spin-resolved electron spectroscopy using circularly polarized radiation SO PHYSICAL REVIEW B LA English DT Article ID LAYER COMPOUNDS GAS; SYNCHROTRON RADIATION; PHOTOEMISSION-SPECTROSCOPY; INVERSE-PHOTOEMISSION; AUGER ELECTRONS; RB-LAYERS; ANGLE; STATES; LIGHT; INSE AB We have studied the symmetry properties of the bands of the layered semiconductor GaSe along the Delta direction by means of spin-resolved electron spectroscopy using circularly polarized synchrotron radiation and by means of a relativistic LAPW band-structure calculation. The photoelectron spectra show in the main a pair of weakly dispersing peaks caused by direct transitions from valence-band states with symmetries Delta(9)(5), Delta(9)(6) and Delta(7)(5), Delta(8)(6). Our data determine the spin-orbit splitting of these valence bands to be DeltaE(so)=0.3+/-0.1 eV. We find a gap in the unoccupied bands along Delta about 8 eV above the fundamental gap. The analysis of the photoelectron spin polarization reveals that also unoccupied states with low symmetries Delta(7)(5), Delta(8)(6) and Delta(9)(5), Delta(9)(6) are involved in excitation and emission. Spin resolved spectra measured at Auger electrons following the decay of Ga 3d core holes confirm that p derived unoccupied states exists below the vacuum level. C1 Univ Bielefeld, Fak Phys, D-33501 Bielefeld, Germany. Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany. Tech Univ Darmstadt, Fachbereich Mat Wissensch, D-64287 Darmstadt, Germany. Tech Univ Vienna, Inst Phys & Theoret Chem, A-1060 Vienna, Austria. RP Yu, SW (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Xray Opt, Berkeley, CA 94720 USA. EM swyu@lbl.gov RI Blaha, Peter/F-2847-2010; Klein, Andreas/E-6081-2010; Heinzmann, Ulrich/A-6248-2012 OI Klein, Andreas/0000-0001-7463-1495; NR 40 TC 7 Z9 7 U1 1 U2 7 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 PY 2004 VL 69 IS 4 AR 045320 DI 10.1103/PhysRevB.69.045320 PG 7 WC Physics, Condensed Matter SC Physics GA 775RV UT WOS:000189075200065 ER PT J AU Adler, SS Afanasiev, S Aidala, C Ajitanand, NN Akiba, Y Alexander, J Amirikas, R Aphecetche, L Aronson, SH Averbeck, R Awes, TC Azmoun, R Babintsev, V Baldisseri, A Barish, KN Barnes, PD Bassalleck, B Bathe, S Batsouli, S Baublis, V Bazilevsky, A Belikov, S Berdnikov, Y Bhagavatula, S Boissevain, JG Borel, H Borenstein, S Brooks, ML Brown, DS Bruner, N Bucher, D Buesching, H Bumazhnov, V Bunce, G Burward-Hoy, JM Butsyk, S Camard, X Chai, JS Chand, P Chang, WC Chernichenko, S Chi, CY Chiba, J Chiu, M Choi, IJ Choi, J Choudhury, RK Chujo, T Cianciolo, V Cobigo, Y Cole, BA Constantin, P d'Enterria, DG David, G Delagrange, H Denisov, A Deshpande, A Desmond, EJ Dietzsch, O Drapier, O Drees, A du Rietz, R Durum, A Dutta, D Efremenko, YV El Chenawi, K Enokizono, A En'yo, H Esumi, S Ewell, L Fields, DE Fleuret, F Fokin, SL Fox, BD Fraenkel, Z Frantz, JE Franz, A Frawley, AD Fung, SY Garpman, S Ghosh, TK Glenn, A Gogiberidze, G Gonin, M Gosset, J Goto, Y de Cassagnac, RG Grau, N Greene, SV Perdekamp, MG Guryn, W Gustafsson, HA Hachiya, T Haggerty, JS Hamagaki, H Hansen, AG Hartouni, EP Harvey, M Hayano, R He, X Heffner, M Hemmick, TK Heuser, JM Hibino, M Hill, JC Holzmann, W Homma, K Hong, B Hoover, A Ichihara, T Ikonnikov, VV Imai, K Isenhower, LD Ishihara, M Issah, M Isupov, A Jacak, BV Jang, WY Jeong, Y Jia, J Jinnouchi, O Johnson, BM Johnson, SC Joo, KS Jouan, D Kametani, S Kamihara, N Kang, JH Kapoor, SS Katou, K Kelly, S Khachaturov, B Khanzadeev, A Kikuchi, J Kim, DH Kim, DJ Kim, DW Kim, E Kim, GB Kim, HJ Kistenev, E Kiyomichi, A Kiyoyama, K Klein-Boesing, C Kobayashi, H Kochenda, L Kochetkov, V Koehler, D Kohama, T Kopytine, M Kotchetkov, D Kozlov, A Kroon, PJ Kuberg, CH Kurita, K Kuroki, Y Kweon, MJ Kwon, Y Kyle, GS Lacey, R Ladygin, V Lajoie, JG Lebedev, A Leckey, S Lee, DM Lee, S Leitch, MJ Li, XH Lim, H Litvinenko, A Liu, MX Liu, Y Maguire, CF Makdisi, YI Malakhov, A Manko, VI Mao, Y Martinez, G Marx, MD Masui, H Matathias, F Matsumoto, T McGaughey, PL Melnikov, E Messer, F Miake, Y Milan, J Miller, TE Milov, A Mioduszewski, S Mischke, RE Mishra, GC Mitchell, JT Mohanty, AK Morrison, DP Moss, JM Muhlbacher, F Mukhopadhyay, D Muniruzzaman, M Murata, J Nagamiya, S Nagle, JL Nakamura, T Nandi, BK Nara, M Newby, J Nilsson, P Nyanin, AS Nystrand, J O'Brien, E Ogilvie, CA Ohnishi, H Ojha, ID Okada, K Ono, M Onuchin, V Oskarsson, A Otterlund, I Oyama, K Ozawa, K Pal, D Palounek, APT Pantuev, VS Papavassiliou, V Park, J Parmar, A Pate, SF Peitzmann, T Peng, JC Peresedov, V Pinkenburg, C Pisani, RP Plasil, F Purschke, ML Purwar, A Rak, J Ravinovich, I Read, KF Reuter, M Reygers, K Riabov, V Riabov, Y Roche, G Romana, A Rosati, M Rosnet, P Ryu, SS Sadler, ME Saito, N Sakaguchi, T Sakai, M Sakai, S Samsonov, V Sanfratello, L Santo, R Sato, HD Sato, S Sawada, S Schutz, Y Semenov, V Seto, R Shaw, MR Shea, TK Shibata, TA Shigaki, K Shiina, T Silva, CL Silvermyr, D Sim, KS Singh, CP Singh, V Sivertz, M Soldatov, A Soltz, RA Sondheim, WE Sorensen, SP Sourikova, IV Staley, F Stankus, PW Stenlund, E Stepanov, M Ster, A Stoll, SP Sugitate, T Sullivan, JP Takagui, EM Taketani, A Tamai, M Tanaka, KH Tanaka, Y Tanida, K Tannenbaum, MJ Tarjan, P Tepe, JD Thomas, TL Tojo, J Torii, H Towell, RS Tserruya, I Tsuruoka, H Tuli, SK Tydesjo, H Tyurin, N van Hecke, HW Velkovska, J Velkovsky, M Villatte, L Vinogradov, AA Volkov, MA Vznuzdaev, E Wang, XR Watanabe, Y White, SN Wohn, FK Woody, CL Xie, W Yang, Y Yanovich, A Yokkaichi, S Young, GR Yushmanov, IE Zajc, WA Zhang, C Zhou, S Zhou, SJ Zolin, L AF Adler, SS Afanasiev, S Aidala, C Ajitanand, NN Akiba, Y Alexander, J Amirikas, R Aphecetche, L Aronson, SH Averbeck, R Awes, TC Azmoun, R Babintsev, V Baldisseri, A Barish, KN Barnes, PD Bassalleck, B Bathe, S Batsouli, S Baublis, V Bazilevsky, A Belikov, S Berdnikov, Y Bhagavatula, S Boissevain, JG Borel, H Borenstein, S Brooks, ML Brown, DS Bruner, N Bucher, D Buesching, H Bumazhnov, V Bunce, G Burward-Hoy, JM Butsyk, S Camard, X Chai, JS Chand, P Chang, WC Chernichenko, S Chi, CY Chiba, J Chiu, M Choi, IJ Choi, J Choudhury, RK Chujo, T Cianciolo, V Cobigo, Y Cole, BA Constantin, P d'Enterria, DG David, G Delagrange, H Denisov, A Deshpande, A Desmond, EJ Dietzsch, O Drapier, O Drees, A du Rietz, R Durum, A Dutta, D Efremenko, YV El Chenawi, K Enokizono, A En'yo, H Esumi, S Ewell, L Fields, DE Fleuret, F Fokin, SL Fox, BD Fraenkel, Z Frantz, JE Franz, A Frawley, AD Fung, SY Garpman, S Ghosh, TK Glenn, A Gogiberidze, G Gonin, M Gosset, J Goto, Y de Cassagnac, RG Grau, N Greene, SV Perdekamp, MG Guryn, W Gustafsson, HA Hachiya, T Haggerty, JS Hamagaki, H Hansen, AG Hartouni, EP Harvey, M Hayano, R He, X Heffner, M Hemmick, TK Heuser, JM Hibino, M Hill, JC Holzmann, W Homma, K Hong, B Hoover, A Ichihara, T Ikonnikov, VV Imai, K Isenhower, LD Ishihara, M Issah, M Isupov, A Jacak, BV Jang, WY Jeong, Y Jia, J Jinnouchi, O Johnson, BM Johnson, SC Joo, KS Jouan, D Kametani, S Kamihara, N Kang, JH Kapoor, SS Katou, K Kelly, S Khachaturov, B Khanzadeev, A Kikuchi, J Kim, DH Kim, DJ Kim, DW Kim, E Kim, GB Kim, HJ Kistenev, E Kiyomichi, A Kiyoyama, K Klein-Boesing, C Kobayashi, H Kochenda, L Kochetkov, V Koehler, D Kohama, T Kopytine, M Kotchetkov, D Kozlov, A Kroon, PJ Kuberg, CH Kurita, K Kuroki, Y Kweon, MJ Kwon, Y Kyle, GS Lacey, R Ladygin, V Lajoie, JG Lebedev, A Leckey, S Lee, DM Lee, S Leitch, MJ Li, XH Lim, H Litvinenko, A Liu, MX Liu, Y Maguire, CF Makdisi, YI Malakhov, A Manko, VI Mao, Y Martinez, G Marx, MD Masui, H Matathias, F Matsumoto, T McGaughey, PL Melnikov, E Messer, F Miake, Y Milan, J Miller, TE Milov, A Mioduszewski, S Mischke, RE Mishra, GC Mitchell, JT Mohanty, AK Morrison, DP Moss, JM Muhlbacher, F Mukhopadhyay, D Muniruzzaman, M Murata, J Nagamiya, S Nagle, JL Nakamura, T Nandi, BK Nara, M Newby, J Nilsson, P Nyanin, AS Nystrand, J O'Brien, E Ogilvie, CA Ohnishi, H Ojha, ID Okada, K Ono, M Onuchin, V Oskarsson, A Otterlund, I Oyama, K Ozawa, K Pal, D Palounek, APT Pantuev, VS Papavassiliou, V Park, J Parmar, A Pate, SF Peitzmann, T Peng, JC Peresedov, V Pinkenburg, C Pisani, RP Plasil, F Purschke, ML Purwar, A Rak, J Ravinovich, I Read, KF Reuter, M Reygers, K Riabov, V Riabov, Y Roche, G Romana, A Rosati, M Rosnet, P Ryu, SS Sadler, ME Saito, N Sakaguchi, T Sakai, M Sakai, S Samsonov, V Sanfratello, L Santo, R Sato, HD Sato, S Sawada, S Schutz, Y Semenov, V Seto, R Shaw, MR Shea, TK Shibata, TA Shigaki, K Shiina, T Silva, CL Silvermyr, D Sim, KS Singh, CP Singh, V Sivertz, M Soldatov, A Soltz, RA Sondheim, WE Sorensen, SP Sourikova, IV Staley, F Stankus, PW Stenlund, E Stepanov, M Ster, A Stoll, SP Sugitate, T Sullivan, JP Takagui, EM Taketani, A Tamai, M Tanaka, KH Tanaka, Y Tanida, K Tannenbaum, MJ Tarjan, P Tepe, JD Thomas, TL Tojo, J Torii, H Towell, RS Tserruya, I Tsuruoka, H Tuli, SK Tydesjo, H Tyurin, N van Hecke, HW Velkovska, J Velkovsky, M Villatte, L Vinogradov, AA Volkov, MA Vznuzdaev, E Wang, XR Watanabe, Y White, SN Wohn, FK Woody, CL Xie, W Yang, Y Yanovich, A Yokkaichi, S Young, GR Yushmanov, IE Zajc, WA Zhang, C Zhou, S Zhou, SJ Zolin, L CA PHENIX Collaboration TI J/psi production in Au-Au collisions at root s(NN)=200 GeV SO PHYSICAL REVIEW C LA English DT Article ID HEAVY-ION COLLISIONS; PB-PB COLLISIONS; CHARMONIUM SUPPRESSION; DRELL-YAN; CERN-SPS; DEPENDENCE; DETECTOR; PATTERN; STATE AB First results on charm quarkonia production in heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) are presented. The yield of J/psi's measured in the PHENIX experiment via electron-positron decay pairs at midrapidity for Au-Au reactions at roots(NN) = 200 GeV is analyzed as a function of collision centrality. For this analysis we have studied 49.3x10(6) minimum bias Au-Au reactions. We present the J/psi invariant yield dN/dy for peripheral and midcentral reactions. For the most central collisions where we observe no signal above background, we quote 90% confidence level upper limits. We compare these results with our J/psi measurement from proton-proton reactions at the same energy. We find that our measurements are not consistent with models that predict strong enhancement relative to binary collision scaling. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Abilene Christian Univ, Abilene, TX 79699 USA. Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India. Bhabha Atom Res Ctr, Bombay 400085, Maharashtra, India. Univ Calif Riverside, Riverside, CA 92521 USA. CIAE, Beijing, Peoples R China. Univ Tokyo, Grad Sch Sci, Ctr Nucl Study, Bunkyo Ku, Tokyo 1130033, Japan. Columbia Univ, New York, NY 10027 USA. Nevis Labs, Irvington, NY 10533 USA. CEA Saclay, Dapnia, F-91191 Gif Sur Yvette, France. Debrecen Univ, H-4010 Debrecen, Hungary. Florida State Univ, Tallahassee, FL 32306 USA. Georgia State Univ, Atlanta, GA 30303 USA. Hiroshima Univ, Higashihiroshima 7398526, Japan. IHEP, Protvino, Russia. Iowa State Univ, Ames, IA 50011 USA. Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia. KAERI, Cyclotron Applicat Lab, Seoul, South Korea. Kangnung Natl Univ, Kangnung 210702, South Korea. KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan. KFKI Res Inst Particle & Nucl Phys RMKI, H-1525 Budapest 114, Hungary. Korea Univ, Seoul 136701, South Korea. Kurchatov Inst, Russian Res Ctr, Moscow, Russia. Kyoto Univ, Kyoto 606, Japan. Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Clermont Ferrand, CNRS, IN2P3, LPC, F-63177 Clermont Ferrand, France. Lund Univ, Dept Phys, SE-22100 Lund, Sweden. Univ Munster, Inst Kernphys, D-48149 Munster, Germany. Myongji Univ, Yongin 449728, Kyonggido, South Korea. Nagasaki Inst Appl Sci, Nagasaki 8510193, Japan. Univ New Mexico, Albuquerque, NM 87131 USA. New Mexico State Univ, Las Cruces, NM 88003 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Univ Paris 11, CNRS, IN2P3, IPN Orsay, F-91406 Orsay, France. PNPI, Gatchina, Russia. RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan. Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA. St Petersburg State Tech Univ, St Petersburg, Russia. Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil. Seoul Natl Univ, Syst Elect Lab, Seoul, South Korea. SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA. SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA. Univ Nantes, Ecole Mines Nantes, CNRS,IN2P3, SUBATECH, F-44307 Nantes, France. Univ Tennessee, Knoxville, TN 37996 USA. Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan. Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 305, Japan. Vanderbilt Univ, Nashville, TN 37235 USA. Waseda Univ, Adv Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1620044, Japan. Weizmann Inst Sci, IL-76100 Rehovot, Israel. Yonsei Univ, IPAP, Seoul 120749, South Korea. RP Adler, SS (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM zajc@nevis.columbia.edu RI seto, richard/G-8467-2011; Peitzmann, Thomas/K-2206-2012; du Rietz, Rickard/I-3794-2013; En'yo, Hideto/B-2440-2015; Hayano, Ryugo/F-7889-2012; HAMAGAKI, HIDEKI/G-4899-2014; Durum, Artur/C-3027-2014; Yokkaichi, Satoshi/C-6215-2017; Taketani, Atsushi/E-1803-2017; Semenov, Vitaliy/E-9584-2017 OI Peitzmann, Thomas/0000-0002-7116-899X; du Rietz, Rickard/0000-0002-9884-9058; Hayano, Ryugo/0000-0002-1214-7806; Taketani, Atsushi/0000-0002-4776-2315; NR 37 TC 64 Z9 64 U1 6 U2 7 PU AMER 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 2004 VL 69 IS 1 AR 014901 DI 10.1103/PhysRevC.69.014901 PG 10 WC Physics, Nuclear SC Physics GA 770TV UT WOS:000188747700038 ER PT J AU Blank, B Savard, G Doring, J Blazhev, A Canchel, G Chartier, M Henderson, D Janas, Z Kirchner, R Mukha, I Roeckl, E Schmidt, K Zylicz, J AF Blank, B Savard, G Doring, J Blazhev, A Canchel, G Chartier, M Henderson, D Janas, Z Kirchner, R Mukha, I Roeckl, E Schmidt, K Zylicz, J TI High-precision measurement of the half-life of Ga-62 SO PHYSICAL REVIEW C LA English DT Article ID FERMI BETA-DECAY; LIVES AB The beta-decay half-life of Ga-62 has been studied with high precision using on-line mass separated samples. The decay of Ga-62 which is dominated by a 0(+) to 0(+) transition to the ground state of Zn-62 yields a half-life of T-1/2=116.19(4) ms. This result is more precise than any previous measurement by about a factor of 4 or more. The present value is in agreement with older literature values, but slightly disagrees with a recent measurement. We determine an error-weighted average value of all experimental half-lives of 116.18(4) ms. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. CEN Bordeaux Gradignan, F-33175 Gradignan, France. GSI Darmstadt, D-64291 Darmstadt, Germany. Univ Sofia, BG-1164 Sofia, Bulgaria. Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England. Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland. Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland. RP Blank, B (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. NR 17 TC 17 Z9 17 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 2004 VL 69 IS 1 AR 015502 DI 10.1103/PhysRevC.69.015502 PG 7 WC Physics, Nuclear SC Physics GA 770TV UT WOS:000188747700047 ER PT J AU Burvenich, T Bender, M Maruhn, JA Reinhard, PG AF Burvenich, T Bender, M Maruhn, JA Reinhard, PG TI Systematics of fission barriers in superheavy elements SO PHYSICAL REVIEW C LA English DT Review ID CONSTRAINED HARTREE-FOCK; MEAN-FIELD MODELS; MULTIDIMENSIONAL DEFORMATION SPACE; MULTIPOLE SHAPE DISTORTIONS; GENERATOR-COORDINATE METHOD; GROUND-STATE PROPERTIES; HALF-LIVES; ACTINIDE NUCLEI; HEAVIEST NUCLEI; HEAVY-NUCLEI AB We investigate the systematics of fission barriers in superheavy elements in the range Z=108-120 and N=166-182. Results from two self-consistent models for nuclear structure, the relativistic mean-field (RMF) model as well as the nonrelativistic Skyrme-Hartree-Fock approach are compared and discussed. We restrict ourselves to axially symmetric shapes, which provides an upper bound on static fission barriers. We benchmark the predictive power of the models examining the barriers and fission isomers of selected heavy actinide nuclei for which data are available. For both actinides and superheavy nuclei, the RMF model systematically predicts lower barriers than most Skyrme interactions. In particular, the fission isomers are predicted too low by the RMF, which casts some doubt on recent predictions about superdeformed ground states of some superheavy nuclei. For the superheavy nuclei under investigation, fission barriers drop to small values around Z=110, N=180, and increase again for heavier systems. For most of the forces, there is no fission isomer for superheavy nuclei, as superdeformed states are in most cases found to be unstable with respect to octupole distortions. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Free Univ Brussels, Serv Phys & Nucl Theor, B-1050 Brussels, Belgium. Univ Frankfurt, Inst Theoret Phys, D-60325 Frankfurt, Germany. Oak Ridge Natl Lab, Joint Inst Heavy Ion Res, Oak Ridge, TN 37831 USA. Univ Erlangen Nurnberg, Inst Theoret Phys 2, D-91058 Erlangen, Germany. RP Burvenich, T (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RI Bender, Michael/B-9004-2009 NR 141 TC 110 Z9 113 U1 0 U2 9 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 2004 VL 69 IS 1 AR 014307 DI 10.1103/PhysRevC.69.014307 PG 15 WC Physics, Nuclear SC Physics GA 770TV UT WOS:000188747700016 ER PT J AU Davids, CN Woods, PJ Mahmud, H Davinson, T Heinz, A Ressler, JJ Schmidt, K Seweryniak, D Shergur, J Sonzogni, AA Walters, WB AF Davids, CN Woods, PJ Mahmud, H Davinson, T Heinz, A Ressler, JJ Schmidt, K Seweryniak, D Shergur, J Sonzogni, AA Walters, WB TI Proton decay of the highly deformed odd-odd nucleus Eu-130 SO PHYSICAL REVIEW C LA English DT Article ID FINE-STRUCTURE; RADIOACTIVITY; EMITTERS AB The proton decay of the highly deformed odd-odd nucleus Eu-130 has been observed by bombarding a Ni-58 target with a beam of 425 MeV Kr-78 ions. Fusion evaporation residues were separated in-flight using the Argonne fragment mass analyzer and implanted into a double-sided silicon strip detector. Eu-130 decays by the emission of a proton with energy E-p=1020(15) keV [Q(p)=1028(15) keV] and half-life t(1/2)=0.90(-0.29)(+0.49) ms. The transition is assigned to a highly deformed (beta(2)similar to0.3)J(pi)=1(+) ground-state configuration by comparing the decay rate with a new theoretical formalism for deformed odd-odd nuclei. These results clearly demonstrate the sensitivity of the proton decay rate to the spectator neutron configuration. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Univ Edinburgh, Dept Phys & Astron, Edinburgh EH9 3JZ, Midlothian, Scotland. Univ Maryland, Dept Chem, College Pk, MD 20742 USA. Brookhaven Natl Lab, Natl Nucl Data Ctr, Upton, NY 11973 USA. RP Davids, CN (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RI Ressler, Jennifer Jo/F-2279-2010; Heinz, Andreas/E-3191-2014 NR 21 TC 18 Z9 18 U1 1 U2 3 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 0556-2813 EI 1089-490X J9 PHYS REV C JI Phys. Rev. C PD JAN PY 2004 VL 69 IS 1 AR 011302 DI 10.1103/PhysRevC.69.011302 PG 3 WC Physics, Nuclear SC Physics GA 770TV UT WOS:000188747700003 ER PT J AU Garrett, PE Archer, DE Becker, JA Bernstein, LA Hauschild, K Henry, EA McNabb, DP Stoyer, MA Younes, W Johns, GD Nelson, RO Wilburn, WS AF Garrett, PE Archer, DE Becker, JA Bernstein, LA Hauschild, K Henry, EA McNabb, DP Stoyer, MA Younes, W Johns, GD Nelson, RO Wilburn, WS TI Rotational bands and isomeric states in Lu-175 SO PHYSICAL REVIEW C LA English DT Article AB Rotational bands in Lu-175 have been extended through investigation with the (n,n'gamma) reaction. Spallation neutrons bombarded Lu samples, and the resulting gamma rays were detected in a large-scale Compton-suppressed Ge detector array. Prompt- and delayed-gammagamma coincidences have been used to extend the 5/2(+)[402] band to spin 17/2, the 3/2(+)[411] band to spin 11/2, the 1/2(+)[411] band to spin 15/2, and the 1/2(-)[541] and 9/2(-)[514] bands to spin 21/2. A new band, based on the 7/2(-)[523] configuration, is tentatively assigned from its bandhead to spin 13/2. The three-quasiparticle K-pi=19/2(+) isomer is confirmed and its half-life determined to be 984+/-13(stat.)+/-30(sys.) mus, in agreement with previous results. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Garrett, PE (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RI Hauschild, Karl/A-6726-2009 NR 11 TC 7 Z9 8 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 2004 VL 69 IS 1 AR 017302 DI 10.1103/PhysRevC.69.017302 PG 4 WC Physics, Nuclear SC Physics GA 770TV UT WOS:000188747700052 ER PT J AU Hua, H Wu, CY Cline, D Hayes, AB Teng, R Clark, RM Fallon, P Goergen, A Macchiavelli, AO Vetter, K AF Hua, H Wu, CY Cline, D Hayes, AB Teng, R Clark, RM Fallon, P Goergen, A Macchiavelli, AO Vetter, K TI Triaxiality and the aligned h(11/2) neutron orbitals in neutron-rich Zr and Mo isotopes SO PHYSICAL REVIEW C LA English DT Article ID SHAPE COEXISTENCE; SPONTANEOUS FISSION; DEFORMATION; NUCLEI; STATE; REGION; MO-104; SR-98; MASS; SPECTROSCOPY AB Neutron-rich Zr and Mo isotopes were populated as fission fragments produced by the U-238(alpha,f) fusion-fission reaction. The level schemes of these nuclei have been extended beyond the first band crossing region, which can be ascribed to the h(11/2) neutron pair alignment. The spin alignment and signature splitting for the nuh(11/2) orbitals in term of triaxiality is addressed. The crossing frequency of the aligned bands in even Zr and Mo isotopes can be reproduced well by calculations using the cranked shell model. Compared to the Zr isotopes, band crossings in Mo isotopes shift to a lower rotational frequency due to the emerging importance of the gamma degree of freedom. Within the framework of particle-rotor model, the difference in the signature splitting observed for the nuh(11/2) bands between the odd Zr and Mo isotopes can be attributed to the triaxial degree of freedom in the Mo isotopes. The surprising shift of the band crossing to a higher rotational frequency in Mo-106 is interpreted as a manifestation of the deformed subshell closure at N=64. C1 Univ Rochester, Dept Phys, Nucl Struct Res Lab, Rochester, NY 14627 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Hua, H (reprint author), Univ Rochester, Dept Phys, Nucl Struct Res Lab, Rochester, NY 14627 USA. NR 44 TC 90 Z9 96 U1 4 U2 10 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 2004 VL 69 IS 1 AR 014317 DI 10.1103/PhysRevC.69.014317 PG 13 WC Physics, Nuclear SC Physics GA 770TV UT WOS:000188747700026 ER PT J AU Jiang, CL Esbensen, H Back, BB Janssens, RVF Rehm, KE AF Jiang, CL Esbensen, H Back, BB Janssens, RVF Rehm, KE TI Analysis of heavy-ion fusion reactions at extreme sub-barrier energies SO PHYSICAL REVIEW C LA English DT Article ID SUB-BARRIER FUSION; NI-58 AB A coupled-channels analysis has been carried out for fusion reactions in the system Ni-60+Y-89. It demonstrates that conventional coupled-channels calculations are unable to reproduce the unexpected steep falloff of the recently measured cross sections at extreme sub-barrier energies. Heavy-ion fusion excitation functions are also analyzed in terms of the S factor, as this offers a pragmatic way to study fusion behavior in the energy regime of interest. It is shown that the steep falloff in cross section observed in several heavy-ion systems translates into a maximum of the S factor. The energies where the maximum occurs can be parametrized with a simple empirical formula. The parametrization, which is derived here for rather stiff heavy-ion systems, provides an upper limit for reactions involving softer nuclei. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Jiang, CL (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. NR 29 TC 74 Z9 75 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 2004 VL 69 IS 1 AR 014604 DI 10.1103/PhysRevC.69.014604 PG 6 WC Physics, Nuclear SC Physics GA 770TV UT WOS:000188747700032 ER PT J AU Koehler, PE Gledenov, YM Rauscher, T Frohlich, C AF Koehler, PE Gledenov, YM Rauscher, T Frohlich, C TI Resonance analysis of (147)Sm(n,alpha) cross sections: Comparison to optical model calculations and indications of nonstatistical effects SO PHYSICAL REVIEW C LA English DT Article ID ASTROPHYSICAL REACTION-RATES; N,ALPHA MEASUREMENTS; MASSIVE STARS; NUCLEOSYNTHESIS; NUCLEAR; SM-147; PARAMETERS; WIDTHS AB We have measured the (147)Sm(n,alpha) cross section from 3 eV to 500 keV and performed an R-matrix analysis in the resolved region (E(n)<700 eV) to extract alpha widths for 104 resonances. We computed strength functions from these resonance parameters and compared them to transmission coefficients calculated using optical model potentials similar to those employed as inputs to statistical model calculations. The statistical model often is used to predict cross sections and astrophysical reaction rates. Comparing resonance parameters rather than cross sections allows more direct tests of potentials used in the model and hence should offer greater insight into possible improvements. In particular, an improved alpha+nucleus potential is needed for applications in nuclear astrophysics. In addition to providing a more direct test of the alpha+nucleus potential, the alpha-width distributions show indications of nonstatistical effects. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Joint Inst Nucl Res, Dubna, Russia. Univ Basel, Dept Phys & Astron, CH-4056 Basel, Switzerland. RP Koehler, PE (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. EM koehlerpe@ornl.gov RI Rauscher, Thomas/D-2086-2009; Frohlich, Carla/C-4841-2012 OI Rauscher, Thomas/0000-0002-1266-0642; NR 38 TC 30 Z9 30 U1 0 U2 1 PU AMER 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 2004 VL 69 IS 1 AR 015803 DI 10.1103/PhysRevC.69.015803 PG 11 WC Physics, Nuclear SC Physics GA 770TV UT WOS:000188747700050 ER PT J AU Liou, MK Penninga, TD Timmermans, RGE Gibson, BF AF Liou, MK Penninga, TD Timmermans, RGE Gibson, BF TI Soft-photon analysis of nucleon-nucleon bremsstrahlung: Anomalous magnetic moment effects SO PHYSICAL REVIEW C LA English DT Article ID PROTON-PROTON BREMSSTRAHLUNG; PION-PRODUCTION THRESHOLD; PARTIAL-WAVE ANALYSIS; NEUTRON-PROTON; EXCHANGE; COLLISIONS AB Two soft-photon amplitudes, the Low amplitude and the two- u-two-t special amplitude, agree with one another in the case of npgamma but disagree significantly in the case of ppgamma. The two- u-two-t special amplitude describes well the available ppgamma cross section data. The relationship between the two amplitudes as well as the reason they agree and disagree is explored. Using these two soft-photon amplitudes plus a one-boson exchange amplitude, the contribution of the proton and neutron anomalous magnetic moments to ppgamma and npgamma has been investigated for projectile energies above 150 MeV and for laboratory scattering angles lying between 8degrees and 35degrees. The anomalous magnetic moment contribution was found to be significant in the ppgamma process but insignificant in the npgamma process. Additional aspects of the bremsstrahlung mechanism are discussed. Our findings play an important role in understanding the similarities and differences between the Low amplitude and the two-u-two-t special amplitude as well as why the two-u-two-t special amplitude calculation agrees well with the available ppgamma cross section data. C1 CUNY Brooklyn Coll, Dept Phys, Brooklyn, NY 11210 USA. CUNY Brooklyn Coll, Inst Nucl Theory, Brooklyn, NY 11210 USA. Univ Groningen, Theory Grp, Kernfys Versneller Inst, NL-9747 AA Groningen, Netherlands. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Liou, MK (reprint author), CUNY Brooklyn Coll, Dept Phys, Brooklyn, NY 11210 USA. NR 23 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 0556-2813 J9 PHYS REV C JI Phys. Rev. C PD JAN PY 2004 VL 69 IS 1 AR 011001 DI 10.1103/PhysRevC.69.011001 PG 5 WC Physics, Nuclear SC Physics GA 770TV UT WOS:000188747700001 ER PT J AU Navratil, P Caurier, E AF Navratil, P Caurier, E TI Nuclear structure with accurate chiral perturbation theory nucleon-nucleon potential: Application to Li-6 and B-10 SO PHYSICAL REVIEW C LA English DT Article ID MONTE-CARLO CALCULATIONS; SHELL-MODEL; LIGHT-NUCLEI; BINDING-ENERGIES; LAGRANGIANS; FORCES; FORMALISM AB We calculate properties of the A=6 system using the accurate charge-dependent nucleon-nucleon (NN) potential at fourth order of chiral perturbation theory. By application of the ab initio no-core shell model and a variational calculation in the harmonic-oscillator basis with basis size up to 8(h) over bar Omega we obtain the Li-6 binding energy of 28.5(5)MeV and a converged excitation spectrum. Also, we calculate properties of B-10 using the same NN potential in a basis space of up to 8(h) over bar Omega. Our results are consistent with results obtained by standard accurate NN potentials and demonstrate a deficiency of Hamiltonians consisting of only two-body terms. At this order of chiral perturbation theory three-body terms appear. It is expected that inclusion of such terms in the Hamiltonian will improve agreement with experiment. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Univ Strasbourg, Inst Rech Subatom, IN2P3, CNRS, F-67037 Strasbourg 2, France. RP Lawrence Livermore Natl Lab, L-414,POB 808, Livermore, CA 94551 USA. NR 50 TC 57 Z9 57 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 2004 VL 69 IS 1 AR 014311 DI 10.1103/PhysRevC.69.014311 PG 11 WC Physics, Nuclear SC Physics GA 770TV UT WOS:000188747700020 ER PT J AU Perlinska, E Rohozinski, SG Dobaczewski, J Nazarewicz, W AF Perlinska, E Rohozinski, SG Dobaczewski, J Nazarewicz, W TI Local density approximation for proton-neutron pairing correlations: Formalism SO PHYSICAL REVIEW C LA English DT Review ID DOUBLE-BETA DECAY; TO-Z NUCLEI; INTERACTING BOSON MODEL; GROUND-STATE PROPERTIES; GENERALIZED QUASI-SPIN; MEAN-FIELD DESCRIPTION; TIME-ODD COMPONENTS; P-N INTERACTIONS; LIGHT-NUCLEI; SHELL NUCLEI AB In the present study we generalize the self-consistent Hartree-Fock-Bogoliubov (HFB) theory formulated in the coordinate space to the case which incorporates an arbitrary mixing between protons and neutrons in the particle-hole (p-h) and particle-particle ( p-p or pairing) channels. We define the HFB density matrices, discuss their spin-isospin structure, and construct the most general energy-density functional that is quadratic in local densities. The consequences of the local gauge invariance are discussed and the particular case of the Skyrme energy-density functional is studied. By varying the total energy with respect to the density matrices the self-consistent one-body HFB Hamiltonian is obtained and the structure of the resulting mean fields is shown. The consequences of the time-reversal symmetry, charge invariance, and proton-neutron symmetry are summarized. The complete list of expressions required to calculate total energy is presented. C1 Univ Warsaw, Inst Theoret Phys, PL-00681 Warsaw, Poland. Polish Acad Sci, Inst Phys Chem, PL-01224 Warsaw, Poland. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Univ Warsaw, Inst Theoret Phys, Hoza 69, PL-00681 Warsaw, Poland. EM Elzbieta.Perlinska@fuw.edu.pl; Stanislaw-G.Rohozinski@fuw.edu.pl; Jacek.Dobaczewski@fuw.edu.pl; witek@utk.edu NR 197 TC 119 Z9 119 U1 1 U2 11 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 2004 VL 69 IS 1 AR 014316 DI 10.1103/PhysRevC.69.014316 PG 21 WC Physics, Nuclear SC Physics GA 770TV UT WOS:000188747700025 ER PT J AU Tomandl, I Novak, J Burjan, V Raman, S von Egidy, T Wirth, HF Koster, U Schauer, W Starner, JW Jurney, ET Graw, G Hertenberger, R Gollwitzer, A Valnion, B Metz, A AF Tomandl, I Novak, J Burjan, V Raman, S von Egidy, T Wirth, HF Koster, U Schauer, W Starner, JW Jurney, ET Graw, G Hertenberger, R Gollwitzer, A Valnion, B Metz, A TI Nuclear spectroscopy of Na-24 via ((d)over-right-arrow,p) and (n,gamma) reactions SO PHYSICAL REVIEW C LA English DT Article ID THERMAL-NEUTRON CAPTURE; GAMMA-RAYS; MAGNESIUM ISOTOPES; ENERGY-LEVELS; STATES; SCATTERING; ALPHA AB The Na-24 nucleus was investigated via ((d) over right arrow ,p) and (n,gamma) reactions. Within the range of excitation energy from 0 to 6.3 MeV 75 levels were observed. The angular distribution of partial cross sections and vector analyzing powers for 70 levels were determined within the framework of distorted-wave Born approximation. Of 240 gamma transitions assigned to Na-24, 234 were placed in the decay scheme. Based on the extensive (n,gamma) data the neutron separation energy was deduced to be 6959.44+/-0.05 keV. Using spectroscopic information from our ((d) over right arrow ,p) measurement we investigated the role of the direct capture mechanism in the Na-23(n,gamma)Na-24 reaction. C1 Inst Nucl Phys, CZ-25068 Rez, Czech Republic. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Tech Univ Munich, Dept Phys, D-85748 Garching, Germany. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Univ Munich, Sekt Phys, D-85748 Garching, Germany. RP Tomandl, I (reprint author), Inst Nucl Phys, CZ-25068 Rez, Czech Republic. EM tomandl@ujf.cas.cz RI Tomandl, Ivo/G-7816-2014; Novak, Jan/H-3388-2014 NR 46 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 2004 VL 69 IS 1 AR 014312 DI 10.1103/PhysRevC.69.014312 PG 16 WC Physics, Nuclear SC Physics GA 770TV UT WOS:000188747700021 ER PT J AU Urban, W Rzaaca-Urban, T Durell, JL Phillips, WR Smith, AG Varley, BJ Schulz, N Ahmad, I AF Urban, W Rzaaca-Urban, T Durell, JL Phillips, WR Smith, AG Varley, BJ Schulz, N Ahmad, I TI Observation of octupole excitations in Cs-141 and Cs-143 nuclei SO PHYSICAL REVIEW C LA English DT Article ID RICH XE ISOTOPES; NEUTRON-RICH; SPONTANEOUS FISSION; BARIUM ISOTOPES; DEFORMATION; TRANSITION; SEARCH; SHAPES; SPINS AB Excited states in Cs-141 and Cs-143, populated in spontaneous fission of Cm-248, were studied by means of prompt- gamma spectroscopy, using the EUROGAM2 multidetector array. This work reports the first observation of octupole excitations in the Cs-141 and Cs-143 nuclei. The new data for Cs-141,Cs-143 do not support theoretical predictions of octupole deformation in the neutron-rich Cs isotopes and indicates octupole correlations weaker than observed in the corresponding Ba isotones. C1 Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland. Univ Manchester, Dept Phys & Astron, Schuster Lab, Manchester M13 9PL, Lancs, England. CNRS, IN2P3, Inst Rech Subatom, F-67037 Strasbourg, France. Univ Strasbourg 1, F-67037 Strasbourg, France. Argonne Natl Lab, Argonne, IL 60439 USA. RP Urban, W (reprint author), Univ Warsaw, Inst Expt Phys, Ul Hoza 69, PL-00681 Warsaw, Poland. NR 19 TC 17 Z9 18 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 2004 VL 69 IS 1 AR 017305 DI 10.1103/PhysRevC.69.017305 PG 4 WC Physics, Nuclear SC Physics GA 770TV UT WOS:000188747700055 ER PT J AU Acosta, D Affolder, T Akimoto, H Albrow, MG Ambrose, D Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Asakawa, T Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Badgett, W Bailey, S de Barbaro, P Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Behari, S Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Bensinger, J Beretvas, A Berryhill, J Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Blusk, SR Bocci, A Bodek, A Bolla, G Bolshov, A Bonushkin, Y Bortoletto, D Boudreau, J Brandl, A Bromberg, C Brozovic, M Brubaker, E Bruner, N Budagov, J Budd, HS Burkett, K Busetto, G Byrum, KL Cabrera, S Calafiura, P Campbell, M Carithers, W Carlson, J Carlsmith, D Caskey, W Castro, A Cauz, D Cerri, A Cerrito, L Chan, AW Chang, PS Chang, PT Chapman, J Chen, C Chen, YC Cheng, MT Chertok, M Chiarelli, G Chirikov-Zorin, I Chlachidze, G Chlebana, F Christofek, L Chu, ML Chung, JY Chung, WH Chung, YS Ciobanu, CI Clark, AG Coca, M Connolly, A Convery, M Conway, J Cordelli, M Cranshaw, J Culbertson, R Dagenhart, D D'Auria, S De Cecco, S DeJongh, F Dell'Agnello, S Dell'Orso, M Demers, S Demortier, L Deninno, M De Pedis, D Derwent, PF Devlin, T Dionisi, C Dittmann, JR Dominguez, A Donati, S D'Onofrio, M Dorigo, T Eddy, N Einsweiler, K Engels, E Erbacher, R Errede, D Errede, S Eusebi, R Fan, Q Farrington, S Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Flores-Castillo, LR Foster, GW Franklin, M Freeman, J Friedman, J Fukui, Y Furic, I Galeotti, S Gallas, A Gallinaro, M Gao, T Garcia-Sciveres, M Garfinkel, AF Gatti, P Gay, C Gerdes, DW Gerstein, E Giagu, S Giannetti, P Giolo, K Giordani, M Giromini, P Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, J Gomez, G Goncharov, M Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Green, C Gresele, A Grim, G Grosso-Pilcher, C Guenther, M Guillian, G da Costa, JG Haas, RM Haber, C Hahn, SR Halkiadakis, E Hall, C Handa, T Handler, R Happacher, F Hara, K Hardman, AD Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Heiss, A Hennecke, M Herndon, M Hill, C Hocker, A Hoffman, KD Hollebeek, R Holloway, L Hou, S Huffman, BT Hughes, R Huston, J Huth, J Ikeda, H Issever, C Incandela, J Introzzi, G Iori, M Ivanov, A Iwai, J Iwata, Y Iyutin, B James, E Jones, M Joshi, U Kambara, H Kamon, T Kaneko, T Kang, J Unel, MK Karr, K Kartal, S Kasha, H Kato, Y Keaffaber, TA Kelley, K Kelly, M Kennedy, RD Kephart, R Khazins, D Kikuchi, T Kilminster, B Kim, BJ Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, TH Kim, YK Kirby, M Kirk, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kotelnikov, K Kovacs, E Kroll, J Kruse, M Krutelyov, V Kuhlmann, SE Kurino, K Kuwabara, T Kuznetsova, N Laasanen, AT Lai, N Lami, S Lammel, S Lancaster, J Lannon, K Lancaster, M Lander, R Lath, A Latino, G LeCompte, T Le, Y Lee, J Lee, SW Leonardo, N Leone, S Li, K Lin, CS Lindgren, M Liss, TM Liu, JB Liu, T Liu, YC Litvintsev, DO Lobban, O Lockyer, NS Loginov, A Loken, J Loreti, M Lucchesi, D Lukens, P Lusin, S Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Manca, G Mariotti, M Martignon, G Martin, M Martin, A Martin, V Martinez, M Matthews, JAJ Mazzanti, P McFarland, KS McIntyre, P Menguzzato, M Menzione, A Merkel, P Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Minato, H Miscetti, S Mishina, M Mitselmakher, G Miyazaki, Y Moggi, N Moore, E Moore, R Morita, Y Moulik, T Mulhearn, M Mukherjee, A Muller, T Munar, A Murat, P Murgia, S Nachtman, J Nagaslaev, V Nahn, S Nakada, H Nakano, I Napora, R Niell, F Nelson, C Nelson, T Neu, C Neubauer, MS Neuberger, D Newman-Holmes, C Ngan, CYP Nigmanov, T Niu, H Nodulman, L Nomerotski, A Oh, SH Oh, YD Ohmoto, T Ohsugi, T Oishi, R Okusawa, T Olsen, J Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Partos, D Patrick, J Pauletta, G Paulini, M Pauly, T Paus, C Pellett, D Penzo, A Pescara, L Phillips, TJ Piacentino, G Piedra, J Pitts, KT Pompos, A Pondrom, L Pope, G Pratt, T Prokoshin, F Proudfoot, J Ptohos, F Pukhov, O Punzi, G Rademacker, J Rakitine, A Ratnikov, F Ray, H Reher, D Reichold, A Renton, P Rescigno, M Ribon, A Riegler, W Rimondi, F Ristori, L Riveline, M Robertson, WJ Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Ryan, D Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sarkar, S Sato, H Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scott, A Scribano, A Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Shah, T Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Siegrist, J Sill, A Sinervo, P Singh, P Slaughter, AJ Sliwa, K Snider, FD Snihur, R Solodsky, A Speer, T Spezziga, M Sphicas, P Spinella, F Spiropulu, M Spiegel, L Steele, J Stefanini, A Strologas, J Strumia, F Stuart, D Sukhanov, A Sumorok, K Suzuki, T Takano, T Takashima, R Takikawa, K Tamburello, P Tanaka, M Tannenbaum, B Tecchio, M Tesarek, RJ Teng, PK Terashi, K Tether, S Thom, J Thompson, AS Thomson, E Thurman-Keup, R Tipton, P Tkaczyk, S Toback, D Tollefson, K Tonelli, D Tonnesmann, M Toyoda, H Trischuk, W de Troconiz, JF Tseng, J Tsybychev, D Turini, N Ukegawa, F Unverhau, T Vaiciulis, T Varganov, A Vataga, E Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Vucinic, D Wagner, RG Wagner, RL Wagner, W Wan, Z Wang, C Wang, MJ Wang, SM Ward, B Waschke, S Watanabe, T Waters, D Watts, T Weber, M Wenzel, H Whitehouse, B Wicklund, AB Wicklund, E Wilkes, T Williams, HH Wilson, P Winer, BL Winn, D Wolbers, S Wolinski, D Wolinski, J Wolinski, S Wolter, M Worm, S Wu, X Wurthwein, F Wyss, J Yang, UK Yao, W Yeh, GP Yeh, P Yi, K Yoh, J Yosef, C Yoshida, T Yu, I Yu, S Yu, Z Yun, JC Zanello, L Zanetti, A Zetti, F Zucchelli, S AF Acosta, D Affolder, T Akimoto, H Albrow, MG Ambrose, D Amidei, D Anikeev, K Antos, J Apollinari, G Arisawa, T Artikov, A Asakawa, T Ashmanskas, W Azfar, F Azzi-Bacchetta, P Bacchetta, N Bachacou, H Badgett, W Bailey, S de Barbaro, P Barbaro-Galtieri, A Barnes, VE Barnett, BA Baroiant, S Barone, M Bauer, G Bedeschi, F Behari, S Belforte, S Bell, WH Bellettini, G Bellinger, J Benjamin, D Bensinger, J Beretvas, A Berryhill, J Bhatti, A Binkley, M Bisello, D Bishai, M Blair, RE Blocker, C Bloom, K Blumenfeld, B Blusk, SR Bocci, A Bodek, A Bolla, G Bolshov, A Bonushkin, Y Bortoletto, D Boudreau, J Brandl, A Bromberg, C Brozovic, M Brubaker, E Bruner, N Budagov, J Budd, HS Burkett, K Busetto, G Byrum, KL Cabrera, S Calafiura, P Campbell, M Carithers, W Carlson, J Carlsmith, D Caskey, W Castro, A Cauz, D Cerri, A Cerrito, L Chan, AW Chang, PS Chang, PT Chapman, J Chen, C Chen, YC Cheng, MT Chertok, M Chiarelli, G Chirikov-Zorin, I Chlachidze, G Chlebana, F Christofek, L Chu, ML Chung, JY Chung, WH Chung, YS Ciobanu, CI Clark, AG Coca, M Connolly, A Convery, M Conway, J Cordelli, M Cranshaw, J Culbertson, R Dagenhart, D D'Auria, S De Cecco, S DeJongh, F Dell'Agnello, S Dell'Orso, M Demers, S Demortier, L Deninno, M De Pedis, D Derwent, PF Devlin, T Dionisi, C Dittmann, JR Dominguez, A Donati, S D'Onofrio, M Dorigo, T Eddy, N Einsweiler, K Engels, E Erbacher, R Errede, D Errede, S Eusebi, R Fan, Q Farrington, S Feild, RG Fernandez, JP Ferretti, C Field, RD Fiori, I Flaugher, B Flores-Castillo, LR Foster, GW Franklin, M Freeman, J Friedman, J Fukui, Y Furic, I Galeotti, S Gallas, A Gallinaro, M Gao, T Garcia-Sciveres, M Garfinkel, AF Gatti, P Gay, C Gerdes, DW Gerstein, E Giagu, S Giannetti, P Giolo, K Giordani, M Giromini, P Glagolev, V Glenzinski, D Gold, M Goldschmidt, N Goldstein, J Gomez, G Goncharov, M Gorelov, I Goshaw, AT Gotra, Y Goulianos, K Green, C Gresele, A Grim, G Grosso-Pilcher, C Guenther, M Guillian, G da Costa, JG Haas, RM Haber, C Hahn, SR Halkiadakis, E Hall, C Handa, T Handler, R Happacher, F Hara, K Hardman, AD Harris, RM Hartmann, F Hatakeyama, K Hauser, J Heinrich, J Heiss, A Hennecke, M Herndon, M Hill, C Hocker, A Hoffman, KD Hollebeek, R Holloway, L Hou, S Huffman, BT Hughes, R Huston, J Huth, J Ikeda, H Issever, C Incandela, J Introzzi, G Iori, M Ivanov, A Iwai, J Iwata, Y Iyutin, B James, E Jones, M Joshi, U Kambara, H Kamon, T Kaneko, T Kang, J Unel, MK Karr, K Kartal, S Kasha, H Kato, Y Keaffaber, TA Kelley, K Kelly, M Kennedy, RD Kephart, R Khazins, D Kikuchi, T Kilminster, B Kim, BJ Kim, DH Kim, HS Kim, MJ Kim, SB Kim, SH Kim, TH Kim, YK Kirby, M Kirk, M Kirsch, L Klimenko, S Koehn, P Kondo, K Konigsberg, J Korn, A Korytov, A Kotelnikov, K Kovacs, E Kroll, J Kruse, M Krutelyov, V Kuhlmann, SE Kurino, K Kuwabara, T Kuznetsova, N Laasanen, AT Lai, N Lami, S Lammel, S Lancaster, J Lannon, K Lancaster, M Lander, R Lath, A Latino, G LeCompte, T Le, Y Lee, J Lee, SW Leonardo, N Leone, S Li, K Lin, CS Lindgren, M Liss, TM Liu, JB Liu, T Liu, YC Litvintsev, DO Lobban, O Lockyer, NS Loginov, A Loken, J Loreti, M Lucchesi, D Lukens, P Lusin, S Lyons, L Lys, J Madrak, R Maeshima, K Maksimovic, P Malferrari, L Mangano, M Manca, G Mariotti, M Martignon, G Martin, M Martin, A Martin, V Martinez, M Matthews, JAJ Mazzanti, P McFarland, KS McIntyre, P Menguzzato, M Menzione, A Merkel, P Mesropian, C Meyer, A Miao, T Miller, R Miller, JS Minato, H Miscetti, S Mishina, M Mitselmakher, G Miyazaki, Y Moggi, N Moore, E Moore, R Morita, Y Moulik, T Mulhearn, M Mukherjee, A Muller, T Munar, A Murat, P Murgia, S Nachtman, J Nagaslaev, V Nahn, S Nakada, H Nakano, I Napora, R Niell, F Nelson, C Nelson, T Neu, C Neubauer, MS Neuberger, D Newman-Holmes, C Ngan, CYP Nigmanov, T Niu, H Nodulman, L Nomerotski, A Oh, SH Oh, YD Ohmoto, T Ohsugi, T Oishi, R Okusawa, T Olsen, J Orejudos, W Pagliarone, C Palmonari, F Paoletti, R Papadimitriou, V Partos, D Patrick, J Pauletta, G Paulini, M Pauly, T Paus, C Pellett, D Penzo, A Pescara, L Phillips, TJ Piacentino, G Piedra, J Pitts, KT Pompos, A Pondrom, L Pope, G Pratt, T Prokoshin, F Proudfoot, J Ptohos, F Pukhov, O Punzi, G Rademacker, J Rakitine, A Ratnikov, F Ray, H Reher, D Reichold, A Renton, P Rescigno, M Ribon, A Riegler, W Rimondi, F Ristori, L Riveline, M Robertson, WJ Rodrigo, T Rolli, S Rosenson, L Roser, R Rossin, R Rott, C Roy, A Ruiz, A Ryan, D Safonov, A St Denis, R Sakumoto, WK Saltzberg, D Sanchez, C Sansoni, A Santi, L Sarkar, S Sato, H Savard, P Savoy-Navarro, A Schlabach, P Schmidt, EE Schmidt, MP Schmitt, M Scodellaro, L Scott, A Scribano, A Sedov, A Seidel, S Seiya, Y Semenov, A Semeria, F Shah, T Shapiro, MD Shepard, PF Shibayama, T Shimojima, M Shochet, M Sidoti, A Siegrist, J Sill, A Sinervo, P Singh, P Slaughter, AJ Sliwa, K Snider, FD Snihur, R Solodsky, A Speer, T Spezziga, M Sphicas, P Spinella, F Spiropulu, M Spiegel, L Steele, J Stefanini, A Strologas, J Strumia, F Stuart, D Sukhanov, A Sumorok, K Suzuki, T Takano, T Takashima, R Takikawa, K Tamburello, P Tanaka, M Tannenbaum, B Tecchio, M Tesarek, RJ Teng, PK Terashi, K Tether, S Thom, J Thompson, AS Thomson, E Thurman-Keup, R Tipton, P Tkaczyk, S Toback, D Tollefson, K Tonelli, D Tonnesmann, M Toyoda, H Trischuk, W de Troconiz, JF Tseng, J Tsybychev, D Turini, N Ukegawa, F Unverhau, T Vaiciulis, T Varganov, A Vataga, E Vejcik, S Velev, G Veramendi, G Vidal, R Vila, I Vilar, R Volobouev, I von der Mey, M Vucinic, D Wagner, RG Wagner, RL Wagner, W Wan, Z Wang, C Wang, MJ Wang, SM Ward, B Waschke, S Watanabe, T Waters, D Watts, T Weber, M Wenzel, H Whitehouse, B Wicklund, AB Wicklund, E Wilkes, T Williams, HH Wilson, P Winer, BL Winn, D Wolbers, S Wolinski, D Wolinski, J Wolinski, S Wolter, M Worm, S Wu, X Wurthwein, F Wyss, J Yang, UK Yao, W Yeh, GP Yeh, P Yi, K Yoh, J Yosef, C Yoshida, T Yu, I Yu, S Yu, Z Yun, JC Zanello, L Zanetti, A Zetti, F Zucchelli, S CA CDF Collaboration TI Measurement of the average time-integrated mixing probability of b-flavored hadrons produced at the Fermilab Tevatron SO PHYSICAL REVIEW D LA English DT Article ID P(P)OVER-BAR COLLISIONS; CROSS-SECTION; COLLIDER; TEV; GENERATOR; DETECTOR; CCFM AB We have measured the number of like-sign (LS) and opposite-sign (OS) lepton pairs arising from double semileptonic decays of b and (b) over bar hadrons, pair produced at the Fermilab Tevatron collider. The data samples were collected with the Collider Detector at Fermilab during the 1992-1995 collider run by triggering on the existence of mumu or emu candidates in an event. The observed ratio of LS to OS dileptons leads to a measurement of the average time-integrated mixing probability of all produced b-flavored hadrons which decay weakly, (chi) over bar =0.152+/-0.007 (stat)+/-0.011 (syst), that is significantly larger than the world average (chi) over bar =0.118+/-0.005. C1 Univ Florida, Gainesville, FL 32611 USA. Acad Sinica, Inst Phys, Taipei 11529, Taiwan. Argonne Natl Lab, Argonne, IL 60439 USA. Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy. Brandeis Univ, Waltham, MA 02254 USA. Univ Calif Davis, Davis, CA 95616 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain. Carnegie Mellon Univ, Pittsburgh, PA 15213 USA. Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA. Joint Inst Nucl Res, RU-141980 Dubna, Russia. Duke Univ, Durham, NC 27708 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Univ Florida, Gainesville, FL 32611 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Geneva, CH-1211 Geneva 4, Switzerland. Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland. Harvard Univ, Cambridge, MA 02138 USA. Hiroshima Univ, Higashihiroshima 724, Japan. Univ Illinois, Urbana, IL 61801 USA. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany. KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, Japan. Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea. Seoul Natl Univ, Seoul 151742, South Korea. Sungkyunkwan Univ, Suwon 440746, South Korea. Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. UCL, London WC1E 6BT, England. MIT, Cambridge, MA 02139 USA. Univ Michigan, Ann Arbor, MI 48109 USA. Michigan State Univ, E Lansing, MI 48824 USA. Inst Theoret & Expt Phys, Moscow 117259, Russia. Univ New Mexico, Albuquerque, NM 87131 USA. Northwestern Univ, Evanston, IL 60208 USA. Ohio State Univ, Columbus, OH 43210 USA. Osaka City Univ, Osaka 588, Japan. Univ Oxford, Oxford OX1 3RH, England. Univ Padua, Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy. Univ Penn, Philadelphia, PA 19104 USA. Univ Pisa, Ist Nazl Fis Nucl, I-56100 Pisa, Italy. Scuola Normale Super Pisa, I-56100 Pisa, Italy. Univ Pittsburgh, Pittsburgh, PA 15260 USA. Purdue Univ, W Lafayette, IN 47907 USA. Univ Rochester, Rochester, NY 14627 USA. Rockefeller Univ, New York, NY 10021 USA. Univ Roma La Sapienza, Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy. Rutgers State Univ, Piscataway, NJ 08855 USA. Texas A&M Univ, College Stn, TX 77843 USA. Texas Tech Univ, Lubbock, TX 79409 USA. Univ Toronto, Inst Particle Phys, Toronto, ON M5S 1A7, Canada. Univ Trieste, Ist Nazl Fis Nucl, Udine, Italy. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Tufts Univ, Medford, MA 02155 USA. Waseda Univ, Tokyo 169, Japan. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06520 USA. RP Univ Florida, Gainesville, FL 32611 USA. RI Gallas Torreira, Abraham Antonio/K-6508-2014; Scodellaro, Luca/K-9091-2014; Paulini, Manfred/N-7794-2014; Cabrera Urban, Susana/H-1376-2015; Introzzi, Gianluca/K-2497-2015; Gorelov, Igor/J-9010-2015; Prokoshin, Fedor/E-2795-2012; Leonardo, Nuno/M-6940-2016; Ivanov, Andrew/A-7982-2013; Lancaster, Mark/C-1693-2008; Kim, Soo-Bong/B-7061-2014; Vucinic, Dejan/C-2406-2008; Nomerotski, Andrei/A-5169-2010; Ruiz, Alberto/E-4473-2011; De Cecco, Sandro/B-1016-2012; Wolter, Marcin/A-7412-2012; St.Denis, Richard/C-8997-2012; Azzi, Patrizia/H-5404-2012; manca, giulia/I-9264-2012; Punzi, Giovanni/J-4947-2012; Chiarelli, Giorgio/E-8953-2012 OI Gallas Torreira, Abraham Antonio/0000-0002-2745-7954; Scodellaro, Luca/0000-0002-4974-8330; Paulini, Manfred/0000-0002-6714-5787; Introzzi, Gianluca/0000-0002-1314-2580; Gorelov, Igor/0000-0001-5570-0133; Prokoshin, Fedor/0000-0001-6389-5399; Leonardo, Nuno/0000-0002-9746-4594; Ivanov, Andrew/0000-0002-9270-5643; Ruiz, Alberto/0000-0002-3639-0368; Azzi, Patrizia/0000-0002-3129-828X; Punzi, Giovanni/0000-0002-8346-9052; Chiarelli, Giorgio/0000-0001-9851-4816 NR 23 TC 14 Z9 14 U1 1 U2 7 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 PY 2004 VL 69 IS 1 AR 012002 DI 10.1103/PhysRevD.69.012002 PG 16 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 771LA UT WOS:000188785800011 ER PT J AU Asztalos, SJ Bradley, RF Duffy, L Hagmann, C Kinion, D Moltz, DM Rosenberg, LJ Sikivie, P Stoeffl, W Sullivan, NS Tanner, DB van Bibber, K Yu, DB AF Asztalos, SJ Bradley, RF Duffy, L Hagmann, C Kinion, D Moltz, DM Rosenberg, LJ Sikivie, P Stoeffl, W Sullivan, NS Tanner, DB van Bibber, K Yu, DB TI Improved rf cavity search for halo axions SO PHYSICAL REVIEW D LA English DT Article ID INVISIBLE AXION; HARMLESS AXION; COSMIC AXIONS; CP INVARIANCE; DENSITY AB The axion is a hypothetical elementary particle and cold dark matter candidate. In this rf cavity experiment, halo axions entering a resonant cavity immersed in a static magnetic field convert into microwave photons, with the resulting photons detected by a low-noise receiver. The ADMX Collaboration presents new limits on the axion-to-photon coupling and local axion dark matter halo mass density from a rf cavity axion search in the axion mass range 1.9-2.3 mueV, broadening the search range to 1.9-3.3 mueV. In addition, we report first results from an improved analysis technique. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Natl Radio Astron Observ, Charlottesville, VA 22903 USA. Univ Florida, Dept Phys, Gainesville, FL 32611 USA. Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. MIT, Dept Phys, Cambridge, MA 02139 USA. MIT, Nucl Sci Lab, Cambridge, MA 02139 USA. RP Asztalos, SJ (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. OI Duffy, Leanne/0000-0002-0123-6723 NR 23 TC 73 Z9 73 U1 0 U2 1 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 PY 2004 VL 69 IS 1 AR 011101 DI 10.1103/PhysRevD.69.011101 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 771LA UT WOS:000188785800001 ER PT J AU Aubert, B Barate, R Boutigny, D Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Zghiche, A Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kral, JF Kukartsev, G LeClerc, C Levi, ME Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Ford, K Harrison, TJ Hawkes, CM Knowles, DJ Morgan, SE Penny, RC Watson, AT Watson, NK Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Peters, K Schmuecker, H Steinke, M Barlow, NR Boyd, JT Chevalier, N Cottingham, WN Kelly, MP Latham, TE Mackay, C Wilson, FF Abe, K Cuhadar-Donszelmann, T Hearty, C Mattison, TS McKenna, JA Thiessen, D Kyberd, P McKemey, AK Blinov, VE Bukin, AD Druzhinin, VP Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bruinsma, M Chao, M Kirkby, D Lankford, AJ Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Shen, BC del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Dahmes, B Kuznetsova, N Levy, SL Long, O Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Beringer, J Eisner, AM Heusch, CA Lockman, WS Schalk, T Schmitz, RE Schumm, BA Seiden, A Turri, M Walkowiak, W Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Abe, T Blanc, F Bloom, P Chen, S Clark, PJ Ford, WT Nauenberg, U Olivas, A Rankin, P Roy, J Smith, JG van Hoek, WC Zhang, L Harton, JL Hu, T Soffer, A Toki, WH Wilson, RJ Zhang, J Altenburg, D Brandt, T Brose, J Colberg, T Dickopp, M Dubitzky, RS Hauke, A Lacker, HM Maly, E Muller-Pfefferkorn, R Nogowski, R Otto, S Schubert, J Schubert, KR Schwierz, R Spaan, B Wilden, L Bernard, D Bonneaud, GR Brochard, F Cohen-Tanugi, J Grenier, P Thiebaux, C Vasileiadis, G Verderi, M Khan, A Lavin, D Muheim, F Playfer, S Swain, JE Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Sarti, A Treadwell, E Anulli, F Baldini-Ferroli, R Biasini, M Calcaterra, A de Sangro, R Falciai, D Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Pioppi, M Zallo, A Buzzo, A Capra, R Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Morii, M Won, E Bhimji, W Bowerman, DA Dauncey, PD Egede, U Eschrich, I Gaillard, JR Morton, GW Nash, JA Sanders, P Taylor, GP Grenier, GJ Lee, SJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Yi, J Davier, M Grosdidier, G Hocker, A Laplace, S Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Tantot, L Wormser, G Brigljevic, V Cheng, CH Lange, DJ Wright, DM Bevan, AJ Coleman, JP Fry, JR Gabathuler, E Gamet, R Kay, M Parry, RJ Payne, DJ Sloane, RJ Touramanis, C Back, JJ Harrison, PF Shorthouse, HW Strother, P Vidal, PB Brown, CL Cowan, G Flack, RL Flaecher, HU George, S Green, MG Kurup, A Marker, CE McMahon, TR Ricciardi, S Salvatore, F Vaitsas, G Winter, MA Brown, D Davis, CL Allison, J Barlow, RJ Forti, AC Hart, PA Hodgkinson, MC Jackson, F Lafferty, GD Lyon, AJ Weatherall, JH Williams, JC Farbin, A Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Sciolla, G Taylor, F Yamamoto, RK Mangeol, DJJ Patel, PM Lazzaro, A Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote-Ahern, D Hast, C Taras, P Nicholson, H Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C Baak, MA Raven, G LoSecco, JM Gabriel, TA Brau, B Gan, KK Honscheid, K Hufnagel, D Kagan, H Kass, R Pulliam, T Wong, QK Brau, J Frey, R Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Tiozzo, G Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O John, MJJ Leruste, P Ocariz, J Pivk, M Roos, L Stark, J T'Jampens, S Therin, G Manfredi, PF Re, V Behera, PK Gladney, L Guo, QH Panetta, J Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Del Gamba, V Forti, F Giorgi, MA Lusiani, A Marchiori, G Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Danielson, N Elmer, P Lu, C Miftakov, V Olsen, J Smith, AJS Tanaka, HA Varnes, EW Bellini, F Cavoto, G Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Mazzoni, MA Morganti, S Pierini, M Piredda, G Tehrani, FS Voena, C Christ, S Wagner, G Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Olaiya, EO Xella, SM Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M Legendre, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Yumiceva, FX Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Convery, MR Coupal, DP Dong, D Dorfan, J Dujmic, D Dunwoodie, W Field, RC Glanzman, T Gowdy, SJ Grauges-Pous, E Hadig, T Halyo, V Hryn'ova, T Innes, WR Jessop, CP Kelsey, MH Kim, P Kocian, ML Langenegger, U Leith, DWGS Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Ratcliff, BN Robertson, SH Roodman, A Salnikov, AA Schindler, RH Schwiening, J Simi, G Snyder, A Soha, A Stelzer, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Weinstein, AJR Wisniewski, WJ Wright, DH Young, CC Burchat, PR Edwards, AJ Meyer, TI Petersen, BA Roat, C Ahmed, S Alam, MS Ernst, JA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Borean, C Bosisio, L Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Panvini, RS Banerjee, S Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Band, HR Dasu, S Datta, M Eichenbaum, AM Johnson, JR Kutter, PE Li, H Liu, R Di Lodovico, F Mihalyi, A Mohapatra, AK Pan, Y Prepost, R Sekula, SJ von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Neal, H AF Aubert, B Barate, R Boutigny, D Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Zghiche, A Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kral, JF Kukartsev, G LeClerc, C Levi, ME Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Ford, K Harrison, TJ Hawkes, CM Knowles, DJ Morgan, SE Penny, RC Watson, AT Watson, NK Goetzen, K Held, T Koch, H Lewandowski, B Pelizaeus, M Peters, K Schmuecker, H Steinke, M Barlow, NR Boyd, JT Chevalier, N Cottingham, WN Kelly, MP Latham, TE Mackay, C Wilson, FF Abe, K Cuhadar-Donszelmann, T Hearty, C Mattison, TS McKenna, JA Thiessen, D Kyberd, P McKemey, AK Blinov, VE Bukin, AD Druzhinin, VP Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Bruinsma, M Chao, M Kirkby, D Lankford, AJ Mandelkern, M Mommsen, RK Roethel, W Stoker, DP Buchanan, C Hartfiel, BL Shen, BC del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Sharma, V Berryhill, JW Campagnari, C Dahmes, B Kuznetsova, N Levy, SL Long, O Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Beringer, J Eisner, AM Heusch, CA Lockman, WS Schalk, T Schmitz, RE Schumm, BA Seiden, A Turri, M Walkowiak, W Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Abe, T Blanc, F Bloom, P Chen, S Clark, PJ Ford, WT Nauenberg, U Olivas, A Rankin, P Roy, J Smith, JG van Hoek, WC Zhang, L Harton, JL Hu, T Soffer, A Toki, WH Wilson, RJ Zhang, J Altenburg, D Brandt, T Brose, J Colberg, T Dickopp, M Dubitzky, RS Hauke, A Lacker, HM Maly, E Muller-Pfefferkorn, R Nogowski, R Otto, S Schubert, J Schubert, KR Schwierz, R Spaan, B Wilden, L Bernard, D Bonneaud, GR Brochard, F Cohen-Tanugi, J Grenier, P Thiebaux, C Vasileiadis, G Verderi, M Khan, A Lavin, D Muheim, F Playfer, S Swain, JE Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Sarti, A Treadwell, E Anulli, F Baldini-Ferroli, R Biasini, M Calcaterra, A de Sangro, R Falciai, D Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Pioppi, M Zallo, A Buzzo, A Capra, R Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Morii, M Won, E Bhimji, W Bowerman, DA Dauncey, PD Egede, U Eschrich, I Gaillard, JR Morton, GW Nash, JA Sanders, P Taylor, GP Grenier, GJ Lee, SJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Yi, J Davier, M Grosdidier, G Hocker, A Laplace, S Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Tantot, L Wormser, G Brigljevic, V Cheng, CH Lange, DJ Wright, DM Bevan, AJ Coleman, JP Fry, JR Gabathuler, E Gamet, R Kay, M Parry, RJ Payne, DJ Sloane, RJ Touramanis, C Back, JJ Harrison, PF Shorthouse, HW Strother, P Vidal, PB Brown, CL Cowan, G Flack, RL Flaecher, HU George, S Green, MG Kurup, A Marker, CE McMahon, TR Ricciardi, S Salvatore, F Vaitsas, G Winter, MA Brown, D Davis, CL Allison, J Barlow, RJ Forti, AC Hart, PA Hodgkinson, MC Jackson, F Lafferty, GD Lyon, AJ Weatherall, JH Williams, JC Farbin, A Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Sciolla, G Taylor, F Yamamoto, RK Mangeol, DJJ Patel, PM Lazzaro, A Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Brunet, S Cote-Ahern, D Hast, C Taras, P Nicholson, H Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C Baak, MA Raven, G LoSecco, JM Gabriel, TA Brau, B Gan, KK Honscheid, K Hufnagel, D Kagan, H Kass, R Pulliam, T Wong, QK Brau, J Frey, R Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Tiozzo, G Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O John, MJJ Leruste, P Ocariz, J Pivk, M Roos, L Stark, J T'Jampens, S Therin, G Manfredi, PF Re, V Behera, PK Gladney, L Guo, QH Panetta, J Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Del Gamba, V Forti, F Giorgi, MA Lusiani, A Marchiori, G Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Danielson, N Elmer, P Lu, C Miftakov, V Olsen, J Smith, AJS Tanaka, HA Varnes, EW Bellini, F Cavoto, G Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Mazzoni, MA Morganti, S Pierini, M Piredda, G Tehrani, FS Voena, C Christ, S Wagner, G Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Olaiya, EO Xella, SM Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M Legendre, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Yumiceva, FX Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Convery, MR Coupal, DP Dong, D Dorfan, J Dujmic, D Dunwoodie, W Field, RC Glanzman, T Gowdy, SJ Grauges-Pous, E Hadig, T Halyo, V Hryn'ova, T Innes, WR Jessop, CP Kelsey, MH Kim, P Kocian, ML Langenegger, U Leith, DWGS Luitz, S Luth, V Lynch, HL Marsiske, H Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Ratcliff, BN Robertson, SH Roodman, A Salnikov, AA Schindler, RH Schwiening, J Simi, G Snyder, A Soha, A Stelzer, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Weinstein, AJR Wisniewski, WJ Wright, DH Young, CC Burchat, PR Edwards, AJ Meyer, TI Petersen, BA Roat, C Ahmed, S Alam, MS Ernst, JA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Borean, C Bosisio, L Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Panvini, RS Banerjee, S Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Band, HR Dasu, S Datta, M Eichenbaum, AM Johnson, JR Kutter, PE Li, H Liu, R Di Lodovico, F Mihalyi, A Mohapatra, AK Pan, Y Prepost, R Sekula, SJ von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Neal, H CA BABAR Collaboration TI J/psi production via initial state radiation in e(+)e(-)->mu(+)mu(-)gamma at an e(+)e(-) center-of-mass energy near 10.6 GeV SO PHYSICAL REVIEW D LA English DT Article ID BHABHA SCATTERING; MONTE-CARLO; RESONANCE AB We have studied the process e(+)e(-)-->mu(+)mu(-)gamma at a center-of-mass energy near the Y(4S) resonance for a mu(+)mu(-) invariant mass range near the J/psi mass and measured the cross section sigma(e(+)e(-)-->J/psi gamma-->mu(+)mu(-)gamma). The data set, corresponding to an integrated luminosity of 88.4 fb(-1), was collected using the BABAR detector at the SLAC PEP-II collider. From the measured cross section we extract the product Gamma(J/psi-->e(+)e(-))B(J/psi-->mu(+)mu(-))=0.330+/-0.008+/-0.007 keV. Using the world averages for B(J/psi-->mu(+)mu(-)) and B(J/psi-->e(+)e(-)), we derive the J/psi electronic and total widths: Gamma(J/psi-->e(+)e(-))=5.61+/-0.20 keV and Gamma=94.7+/-4.4 keV. C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France. Univ Bari, Dipartmento Fis, I-70126 Bari, Italy. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Bergen, Inst Phys, N-5007 Bergen, Norway. Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Calif Berkeley, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany. Univ Bristol, Bristol BS8 1TL, Avon, England. Univ British Columbia, Vancouver, BC V6T 1Z1, Canada. Brunel Univ, Uxbridge UB8 3PH, Middx, England. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif Riverside, Riverside, CA 92521 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA. CALTECH, Pasadena, CA 91125 USA. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Colorado, Boulder, CO 80309 USA. Colorado State Univ, Ft Collins, CO 80523 USA. Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany. Ecole Polytech, LLR, F-91128 Palaiseau, France. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Florida A&M Univ, Tallahassee, FL 32307 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Harvard Univ, Cambridge, MA 02138 USA. Univ London Imperial Coll Sci Technol & Med, London SW7 2BW, England. Univ Iowa, Iowa City, IA 52242 USA. Iowa State Univ Sci & Technol, Ames, IA 50011 USA. Lab Accelerateur Lineaire, F-91898 Orsay, France. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Liverpool, Liverpool L69 3BX, Merseyside, England. Univ London Queen Mary & Westfield Coll, London E1 4NS, England. Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England. Univ Louisville, Louisville, KY 40292 USA. Univ Manchester, Manchester M13 9PL, Lancs, England. Univ Maryland, College Pk, MD 20742 USA. Univ Massachusetts, Amherst, MA 01003 USA. MIT, Nucl Sci Lab, Cambridge, MA 02139 USA. McGill Univ, Montreal, PQ H3A 2T8, Canada. Univ Milan, Dipartimento Fis, I-20133 Milan, Italy. Ist Nazl Fis Nucl, I-20133 Milan, Italy. Univ Mississippi, University, MS 38677 USA. Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada. Mt Holyoke Coll, S Hadley, MA 01075 USA. Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy. Ist Nazl Fis Nucl, I-80126 Naples, Italy. NIKHEF H, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands. Univ Notre Dame, Notre Dame, IN 46556 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Ohio State Univ, Columbus, OH 43210 USA. Univ Oregon, Eugene, OR 97403 USA. Univ Padua, Dipartimento Fis, I-35131 Padua, Italy. Ist Nazl Fis Nucl, I-35131 Padua, Italy. Univ Paris 06, F-75252 Paris, France. Univ Paris 07, Lab Phys Nucl HE, F-75252 Paris, France. Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy. Ist Nazl Fis Nucl, I-27100 Pavia, Italy. Univ Penn, Philadelphia, PA 19104 USA. Univ Pisa, Dipartimento Fis, Scuola Normale Super Pisa, I-56127 Pisa, Italy. Ist Nazl Fis Nucl, I-56127 Pisa, Italy. Prairie View A&M Univ, Prairie View, TX 77446 USA. Princeton Univ, Princeton, NJ 08544 USA. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Ist Nazl Fis Nucl, I-00185 Rome, Italy. Univ Rostock, D-18051 Rostock, Germany. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. CEA Saclay, DSM, Dapnia, F-91191 Gif Sur Yvette, France. Univ S Carolina, Columbia, SC 29208 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Stanford Univ, Stanford, CA 94305 USA. SUNY Albany, Albany, NY 12222 USA. Univ Tennessee, Knoxville, TN 37996 USA. Univ Texas, Austin, TX 78712 USA. Univ Texas, Richardson, TX 75083 USA. Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy. Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Univ Perugia, I-06100 Perugia, Italy. Univ Basilicata, I-85100 Potenza, Italy. Univ Valencia, CSIC, Inst Fis Corpuscular, IFIC, Valencia, Spain. RP Aubert, B (reprint author), Phys Particules Lab, F-74941 Annecy Le Vieux, France. RI Monge, Maria Roberta/G-9127-2012; Luppi, Eleonora/A-4902-2015; Kravchenko, Evgeniy/F-5457-2015; Calabrese, Roberto/G-4405-2015; Mir, Lluisa-Maria/G-7212-2015; Martinez Vidal, F*/L-7563-2014; Kolomensky, Yury/I-3510-2015; Lo Vetere, Maurizio/J-5049-2012; Grancagnolo, Sergio/J-3957-2015; Lusiani, Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Morandin, Mauro/A-3308-2016; de Sangro, Riccardo/J-2901-2012; Sarti, Alessio/I-2833-2012; Cavallo, Nicola/F-8913-2012; Negrini, Matteo/C-8906-2014; Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; Bellini, Fabio/D-1055-2009; crosetti, nanni/H-3040-2011; Roe, Natalie/A-8798-2012; Neri, Nicola/G-3991-2012; Forti, Francesco/H-3035-2011; Rotondo, Marcello/I-6043-2012; Patrignani, Claudia/C-5223-2009; Di Lodovico, Francesca/L-9109-2016; M, Saleem/B-9137-2013; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016; Della Ricca, Giuseppe/B-6826-2013; Saeed, Mohammad Alam/J-7455-2012 OI Monge, Maria Roberta/0000-0003-1633-3195; Luppi, Eleonora/0000-0002-1072-5633; Calabrese, Roberto/0000-0002-1354-5400; Mir, Lluisa-Maria/0000-0002-4276-715X; Martinez Vidal, F*/0000-0001-6841-6035; Kolomensky, Yury/0000-0001-8496-9975; Lo Vetere, Maurizio/0000-0002-6520-4480; Grancagnolo, Sergio/0000-0001-8490-8304; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Morandin, Mauro/0000-0003-4708-4240; de Sangro, Riccardo/0000-0002-3808-5455; Sarti, Alessio/0000-0001-5419-7951; Negrini, Matteo/0000-0003-0101-6963; Peters, Klaus/0000-0001-7133-0662; Bellini, Fabio/0000-0002-2936-660X; Neri, Nicola/0000-0002-6106-3756; Forti, Francesco/0000-0001-6535-7965; Rotondo, Marcello/0000-0001-5704-6163; Patrignani, Claudia/0000-0002-5882-1747; Di Lodovico, Francesca/0000-0003-3952-2175; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636; Della Ricca, Giuseppe/0000-0003-2831-6982; Saeed, Mohammad Alam/0000-0002-3529-9255 NR 17 TC 89 Z9 89 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 PY 2004 VL 69 IS 1 AR 011103 DI 10.1103/PhysRevD.69.011103 PG 8 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 771LA UT WOS:000188785800003 ER PT J AU Aubert, B Barate, R Boutigny, D Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Zghiche, A Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kral, JF Kukartsev, G LeClerc, C Levi, ME Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Ford, K Harrison, TJ Hawkes, CM Knowles, DJ Morgan, SE Penny, RC Watson, AT Watson, NK Deppermann, T Goetzen, K Koch, H Lewandowski, B Pelizaeus, M Peters, K Schmuecker, H Steinke, M Barlow, NR Boyd, JT Chevalier, N Cottingham, WN Kelly, MP Latham, TE Mackay, C Wilson, FF Abe, K Cuhadar-Donszelmann, T Hearty, C Mattison, TS McKenna, JA Thiessen, D Kyberd, P McKemey, AK Blinov, VE Bukin, AD Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Chao, M Kirkby, D Lankford, AJ Mandelkern, M McMahon, S Mommsen, RK Roethel, W Stoker, DP Buchanan, C del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Schwanke, U Sharma, V Berryhill, JW Campagnari, C Dahmes, B Kuznetsova, N Levy, SL Long, O Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Beringer, J Eisner, AM Heusch, CA Lockman, WS Schalk, T Schmitz, RE Schumm, BA Seiden, A Turri, M Walkowiak, W Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Abe, T Barillari, T Blanc, F Bloom, P Chen, S Clark, PJ Ford, WT Nauenberg, U Olivas, A Rankin, P Roy, J Smith, JG van Hoek, WC Zhang, L Harton, JL Hu, T Soffer, A Toki, WH Wilson, RJ Zhang, J Altenburg, D Brandt, T Brose, J Colberg, T Dickopp, M Dubitzky, RS Hauke, A Lacker, HM Maly, E Muller-Pfefferkorn, R Nogowski, R Otto, S Schubert, KR Schwierz, R Spaan, B Wilden, L Bernard, D Bonneaud, GR Brochard, F Cohen-Tanugi, J Thiebaux, C Vasileiadis, G Verderi, M Khan, A Lavin, D Muheim, F Playfer, S Swain, JE Tinslay, J Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Sarti, A Treadwell, E Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Falciai, D Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Zallo, A Buzzo, A Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Pastore, FC Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Morii, M Bhimji, W Bowerman, DA Dauncey, PD Egede, U Eschrich, I Gaillard, JR Morton, GW Nash, JA Sanders, P Taylor, GP Grenier, GJ Lee, SJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Yi, J Davier, M Grosdidier, G Hocker, A Laplace, S Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Tantot, L Wormser, G Brigljevic, V Cheng, CH Lange, DJ Wright, DM Bevan, AJ Coleman, JP Fry, JR Gabathuler, E Gamet, R Kay, M Parry, RJ Payne, DJ Sloane, RJ Touramanis, C Back, JJ Harrison, PF Shorthouse, HW Strother, P Vidal, PB Brown, CL Cowan, G Flack, RL Flaecher, HU George, S Green, MG Kurup, A Marker, CE McMahon, TR Ricciardi, S Salvatore, F Vaitsas, G Winter, MA Brown, D Davis, CL Allison, J Barlow, RJ Forti, AC Hart, PA Jackson, F Lafferty, GD Lyon, AJ Weatherall, JH Williams, JC Farbin, A Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Sciolla, G Taylor, F Yamamoto, RK Mangeol, DJJ Milek, M Patel, PM Lazzaro, A Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Hast, C Taras, P Nicholson, H Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C Baak, MA Raven, G LoSecco, JM Gabriel, TA Brau, B Pulliam, T Wong, QK Brau, J Frey, R Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Tiozzo, G Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O John, MJJ Leruste, P Ocariz, J Pivk, M Roos, L Stark, J T'Jampens, S Therin, G Manfredi, PF Re, V Gladney, L Guo, QH Panetta, J Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Danielson, N Elmer, P Lu, C Miftakov, V Olsen, J Smith, AJS Tanaka, HA Varnes, EW Bellini, F Cavoto, G Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Mazzoni, MA Morganti, S Pierini, M Piredda, G Tehrani, FS Voena, C Christ, S Wagner, G Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Olaiya, EO Xella, SM Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Yumiceva, FX Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Convery, MR Coupal, DP Dong, D Dorfan, J Dujmic, D Dunwoodie, W Field, RC Glanzman, T Gowdy, SJ Grauges-Pous, E Hadig, T Halyo, V Hryn'ova, T Innes, WR Jessop, CP Kelsey, MH Kim, P Kocian, ML Langenegger, U Leith, DWGS Luitz, S Luth, V Lynch, HL Marsiske, H Menke, S Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Ratcliff, BN Robertson, SH Roodman, A Salnikov, AA Schindler, RH Schwiening, J Simi, G Snyder, A Soha, A Stelzer, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Weinstein, AJR Wisniewski, WJ Wright, DH Young, CC Burchat, PR Edwards, AJ Meyer, TI Roat, C Ahmed, S Alam, MS Ernst, JA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Borean, C Bosisio, L Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Panvini, RS Banerjee, S Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Band, HR Dasu, S Datta, M Eichenbaum, AM Hu, H Johnson, JR Kutter, PE Li, H Liu, R Di Lodovico, F Mihalyi, A Mohapatra, AK Pan, Y Prepost, R Sekula, SJ von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Neal, H AF Aubert, B Barate, R Boutigny, D Gaillard, JM Hicheur, A Karyotakis, Y Lees, JP Robbe, P Tisserand, V Zghiche, A Palano, A Pompili, A Chen, JC Qi, ND Rong, G Wang, P Zhu, YS Eigen, G Ofte, I Stugu, B Abrams, GS Borgland, AW Breon, AB Brown, DN Button-Shafer, J Cahn, RN Charles, E Day, CT Gill, MS Gritsan, AV Groysman, Y Jacobsen, RG Kadel, RW Kadyk, J Kerth, LT Kolomensky, YG Kral, JF Kukartsev, G LeClerc, C Levi, ME Lynch, G Mir, LM Oddone, PJ Orimoto, TJ Pripstein, M Roe, NA Romosan, A Ronan, MT Shelkov, VG Telnov, AV Wenzel, WA Ford, K Harrison, TJ Hawkes, CM Knowles, DJ Morgan, SE Penny, RC Watson, AT Watson, NK Deppermann, T Goetzen, K Koch, H Lewandowski, B Pelizaeus, M Peters, K Schmuecker, H Steinke, M Barlow, NR Boyd, JT Chevalier, N Cottingham, WN Kelly, MP Latham, TE Mackay, C Wilson, FF Abe, K Cuhadar-Donszelmann, T Hearty, C Mattison, TS McKenna, JA Thiessen, D Kyberd, P McKemey, AK Blinov, VE Bukin, AD Golubev, VB Ivanchenko, VN Kravchenko, EA Onuchin, AP Serednyakov, SI Skovpen, YI Solodov, EP Yushkov, AN Best, D Chao, M Kirkby, D Lankford, AJ Mandelkern, M McMahon, S Mommsen, RK Roethel, W Stoker, DP Buchanan, C del Re, D Hadavand, HK Hill, EJ MacFarlane, DB Paar, HP Rahatlou, S Schwanke, U Sharma, V Berryhill, JW Campagnari, C Dahmes, B Kuznetsova, N Levy, SL Long, O Lu, A Mazur, MA Richman, JD Verkerke, W Beck, TW Beringer, J Eisner, AM Heusch, CA Lockman, WS Schalk, T Schmitz, RE Schumm, BA Seiden, A Turri, M Walkowiak, W Williams, DC Wilson, MG Albert, J Chen, E Dubois-Felsmann, GP Dvoretskii, A Hitlin, DG Narsky, I Porter, FC Ryd, A Samuel, A Yang, S Jayatilleke, S Mancinelli, G Meadows, BT Sokoloff, MD Abe, T Barillari, T Blanc, F Bloom, P Chen, S Clark, PJ Ford, WT Nauenberg, U Olivas, A Rankin, P Roy, J Smith, JG van Hoek, WC Zhang, L Harton, JL Hu, T Soffer, A Toki, WH Wilson, RJ Zhang, J Altenburg, D Brandt, T Brose, J Colberg, T Dickopp, M Dubitzky, RS Hauke, A Lacker, HM Maly, E Muller-Pfefferkorn, R Nogowski, R Otto, S Schubert, KR Schwierz, R Spaan, B Wilden, L Bernard, D Bonneaud, GR Brochard, F Cohen-Tanugi, J Thiebaux, C Vasileiadis, G Verderi, M Khan, A Lavin, D Muheim, F Playfer, S Swain, JE Tinslay, J Andreotti, M Azzolini, V Bettoni, D Bozzi, C Calabrese, R Cibinetto, G Luppi, E Negrini, M Piemontese, L Sarti, A Treadwell, E Anulli, F Baldini-Ferroli, R Calcaterra, A de Sangro, R Falciai, D Finocchiaro, G Patteri, P Peruzzi, IM Piccolo, M Zallo, A Buzzo, A Contri, R Crosetti, G Lo Vetere, M Macri, M Monge, MR Passaggio, S Pastore, FC Patrignani, C Robutti, E Santroni, A Tosi, S Bailey, S Morii, M Bhimji, W Bowerman, DA Dauncey, PD Egede, U Eschrich, I Gaillard, JR Morton, GW Nash, JA Sanders, P Taylor, GP Grenier, GJ Lee, SJ Mallik, U Cochran, J Crawley, HB Lamsa, J Meyer, WT Prell, S Rosenberg, EI Yi, J Davier, M Grosdidier, G Hocker, A Laplace, S Le Diberder, F Lepeltier, V Lutz, AM Petersen, TC Plaszczynski, S Schune, MH Tantot, L Wormser, G Brigljevic, V Cheng, CH Lange, DJ Wright, DM Bevan, AJ Coleman, JP Fry, JR Gabathuler, E Gamet, R Kay, M Parry, RJ Payne, DJ Sloane, RJ Touramanis, C Back, JJ Harrison, PF Shorthouse, HW Strother, P Vidal, PB Brown, CL Cowan, G Flack, RL Flaecher, HU George, S Green, MG Kurup, A Marker, CE McMahon, TR Ricciardi, S Salvatore, F Vaitsas, G Winter, MA Brown, D Davis, CL Allison, J Barlow, RJ Forti, AC Hart, PA Jackson, F Lafferty, GD Lyon, AJ Weatherall, JH Williams, JC Farbin, A Jawahery, A Kovalskyi, D Lae, CK Lillard, V Roberts, DA Blaylock, G Dallapiccola, C Flood, KT Hertzbach, SS Kofler, R Koptchev, VB Moore, TB Saremi, S Staengle, H Willocq, S Cowan, R Sciolla, G Taylor, F Yamamoto, RK Mangeol, DJJ Milek, M Patel, PM Lazzaro, A Palombo, F Bauer, JM Cremaldi, L Eschenburg, V Godang, R Kroeger, R Reidy, J Sanders, DA Summers, DJ Zhao, HW Hast, C Taras, P Nicholson, H Cartaro, C Cavallo, N De Nardo, G Fabozzi, F Gatto, C Lista, L Paolucci, P Piccolo, D Sciacca, C Baak, MA Raven, G LoSecco, JM Gabriel, TA Brau, B Pulliam, T Wong, QK Brau, J Frey, R Potter, CT Sinev, NB Strom, D Torrence, E Colecchia, F Dorigo, A Galeazzi, F Margoni, M Morandin, M Posocco, M Rotondo, M Simonetto, F Stroili, R Tiozzo, G Voci, C Benayoun, M Briand, H Chauveau, J David, P de la Vaissiere, C Del Buono, L Hamon, O John, MJJ Leruste, P Ocariz, J Pivk, M Roos, L Stark, J T'Jampens, S Therin, G Manfredi, PF Re, V Gladney, L Guo, QH Panetta, J Angelini, C Batignani, G Bettarini, S Bondioli, M Bucci, F Calderini, G Carpinelli, M Forti, F Giorgi, MA Lusiani, A Marchiori, G Martinez-Vidal, F Morganti, M Neri, N Paoloni, E Rama, M Rizzo, G Sandrelli, F Walsh, J Haire, M Judd, D Paick, K Wagoner, DE Danielson, N Elmer, P Lu, C Miftakov, V Olsen, J Smith, AJS Tanaka, HA Varnes, EW Bellini, F Cavoto, G Faccini, R Ferrarotto, F Ferroni, F Gaspero, M Mazzoni, MA Morganti, S Pierini, M Piredda, G Tehrani, FS Voena, C Christ, S Wagner, G Waldi, R Adye, T De Groot, N Franek, B Geddes, NI Gopal, GP Olaiya, EO Xella, SM Aleksan, R Emery, S Gaidot, A Ganzhur, SF Giraud, PF de Monchenault, GH Kozanecki, W Langer, M London, GW Mayer, B Schott, G Vasseur, G Yeche, C Zito, M Purohit, MV Weidemann, AW Yumiceva, FX Aston, D Bartoldus, R Berger, N Boyarski, AM Buchmueller, OL Convery, MR Coupal, DP Dong, D Dorfan, J Dujmic, D Dunwoodie, W Field, RC Glanzman, T Gowdy, SJ Grauges-Pous, E Hadig, T Halyo, V Hryn'ova, T Innes, WR Jessop, CP Kelsey, MH Kim, P Kocian, ML Langenegger, U Leith, DWGS Luitz, S Luth, V Lynch, HL Marsiske, H Menke, S Messner, R Muller, DR O'Grady, CP Ozcan, VE Perazzo, A Perl, M Petrak, S Ratcliff, BN Robertson, SH Roodman, A Salnikov, AA Schindler, RH Schwiening, J Simi, G Snyder, A Soha, A Stelzer, J Su, D Sullivan, MK Va'vra, J Wagner, SR Weaver, M Weinstein, AJR Wisniewski, WJ Wright, DH Young, CC Burchat, PR Edwards, AJ Meyer, TI Roat, C Ahmed, S Alam, MS Ernst, JA Saleem, M Wappler, FR Bugg, W Krishnamurthy, M Spanier, SM Eckmann, R Kim, H Ritchie, JL Schwitters, RF Izen, JM Kitayama, I Lou, XC Ye, S Bianchi, F Bona, M Gallo, F Gamba, D Borean, C Bosisio, L Della Ricca, G Dittongo, S Grancagnolo, S Lanceri, L Poropat, P Vitale, L Vuagnin, G Panvini, RS Banerjee, S Brown, CM Fortin, D Jackson, PD Kowalewski, R Roney, JM Band, HR Dasu, S Datta, M Eichenbaum, AM Hu, H Johnson, JR Kutter, PE Li, H Liu, R Di Lodovico, F Mihalyi, A Mohapatra, AK Pan, Y Prepost, R Sekula, SJ von Wimmersperg-Toeller, JH Wu, J Wu, SL Yu, Z Neal, H CA BABAR Collaboration TI Measurements of branching fractions in B ->phi K and B ->phi pi and search for direct CP violation in B-+/-->phi K-+/- SO PHYSICAL REVIEW D LA English DT Article ID B-DECAYS AB We present measurements of branching fractions in the b-->s (s) over bars penguin-dominated decays B+-->phiK(+) and B-0-->phiK(0) in a sample of approximately 89 million B (B) over bar pairs collected by the BABAR detector at the PEP-II asymmetric-energy B-meson factory at SLAC. We determine B(B+-->phiK(+))=(10.0(-0.8)(+0.9)+/-0.5)x10(-6) and B(B-0-->phiK(0))=(8.4(-1.3)(+1.5)+/-0.5)x10(-6). Additionally, we measure the CP-violating charge asymmetry A(CP)(B+/--->phiK(+/-))=0.04+/-0.09+/-0.01, with a 90% confidence-level interval of [-0.10, 0.18], and set an upper limit on the CKM- and color-suppressed decay B+-->phipi(+), B(B+-->phipi(+))<0.41x10(-6) (at the 90% confidence level). C1 Phys Particules Lab, F-74941 Annecy Le Vieux, France. Univ Bari, Dipartmento Fis, I-70126 Bari, Italy. Ist Nazl Fis Nucl, I-70126 Bari, Italy. Inst High Energy Phys, Beijing 100039, Peoples R China. Univ Bergen, Inst Phys, N-5007 Bergen, Norway. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Birmingham, Birmingham B15 2TT, W Midlands, England. Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany. Univ Bristol, Bristol BS8 1TL, Avon, England. Univ British Columbia, Vancouver, BC V6T 1Z1, Canada. Brunel Univ, Uxbridge UB8 3PH, Middx, England. Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Univ Calif Irvine, Irvine, CA 92697 USA. Univ Calif Los Angeles, Los Angeles, CA 90024 USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Inst Particle Phys, Santa Cruz, CA 95064 USA. CALTECH, Pasadena, CA 91125 USA. Univ Cincinnati, Cincinnati, OH 45221 USA. Univ Colorado, Boulder, CO 80309 USA. Colorado State Univ, Ft Collins, CO 80523 USA. Tech Univ Dresden, Inst Kern & Teilchenphys, D-01062 Dresden, Germany. Ecole Polytech, LLR, F-91128 Palaiseau, France. Univ Edinburgh, Edinburgh EH9 3JZ, Midlothian, Scotland. Univ Ferrara, Dipartmento Fis, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, I-44100 Ferrara, Italy. Florida A&M Univ, Tallahassee, FL 32307 USA. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy. Ist Nazl Fis Nucl, I-16146 Genoa, Italy. Harvard Univ, Cambridge, MA 02138 USA. Univ London Imperial Coll Sci Technol & Med, London SW7 2BW, England. Univ Iowa, Iowa City, IA 52242 USA. Iowa State Univ Sci & Technol, Ames, IA 50011 USA. Lab Accelerateur Lineaire, F-91898 Orsay, France. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Liverpool, Liverpool L69 3BX, Merseyside, England. Queen Mary Univ London, London E1 4NS, England. Univ London Royal Holloway & Bedford New Coll, Egham TW20 0EX, Surrey, England. Univ Louisville, Louisville, KY 40292 USA. Univ Manchester, Manchester M13 9PL, Lancs, England. Univ Maryland, College Pk, MD 20742 USA. Univ Massachusetts, Amherst, MA 01003 USA. MIT, Nucl Sci Lab, Cambridge, MA 02139 USA. McGill Univ, Montreal, PQ H3A 2T8, Canada. Univ Milan, Dipartimento Fis, I-20133 Milan, Italy. Ist Nazl Fis Nucl, I-20133 Milan, Italy. Univ Mississippi, University, MS 38677 USA. Univ Montreal, Lab Rene JA Levesque, Montreal, PQ H3C 3J7, Canada. Mt Holyoke Coll, S Hadley, MA 01075 USA. Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy. Ist Nazl Fis Nucl, I-80126 Naples, Italy. NIKHEF H, Natl Inst Nucl Phys & High Energy Phys, NL-1009 DB Amsterdam, Netherlands. Univ Notre Dame, Notre Dame, IN 46556 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Ohio State Univ, Columbus, OH 43210 USA. Univ Oregon, Eugene, OR 97403 USA. Univ Padua, Dipartimento Fis, I-35131 Padua, Italy. Ist Nazl Fis Nucl, I-35131 Padua, Italy. Univ Paris 06, F-75252 Paris, France. Univ Paris 07, Lab Phys Nucl HE, F-75252 Paris, France. Univ Pavia, Dipartimento Elettron, I-27100 Pavia, Italy. Ist Nazl Fis Nucl, I-27100 Pavia, Italy. Univ Penn, Philadelphia, PA 19104 USA. Univ Pisa, Dipartimento Fis, Scuola Normale Super Pisa, I-56127 Pisa, Italy. Ist Nazl Fis Nucl, I-56127 Pisa, Italy. Prairie View A&M Univ, Prairie View, TX 77446 USA. Princeton Univ, Princeton, NJ 08544 USA. Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy. Ist Nazl Fis Nucl, I-00185 Rome, Italy. Univ Rostock, D-18051 Rostock, Germany. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. CEA Saclay, DSM, Dapnia, F-91191 Gif Sur Yvette, France. Univ S Carolina, Columbia, SC 29208 USA. Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Stanford Univ, Stanford, CA 94305 USA. SUNY Albany, Albany, NY 12222 USA. Univ Tennessee, Knoxville, TN 37996 USA. Univ Texas, Austin, TX 78712 USA. Univ Texas, Richardson, TX 75083 USA. Univ Turin, Dipartimento Fis Sperimentale, I-10125 Turin, Italy. Ist Nazl Fis Nucl, I-10125 Turin, Italy. Univ Trieste, Dipartmento Fis, I-34127 Trieste, Italy. Ist Nazl Fis Nucl, I-34127 Trieste, Italy. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Victoria, Victoria, BC V8W 3P6, Canada. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Univ Perugia, I-06100 Perugia, Italy. Univ Basilicata, I-85100 Potenza, Italy. Univ Valencia, CSIC, Inst Fis Corpuscular, IFIC, Valencia, Spain. RP Phys Particules Lab, F-74941 Annecy Le Vieux, France. RI Della Ricca, Giuseppe/B-6826-2013; Di Lodovico, Francesca/L-9109-2016; crosetti, nanni/H-3040-2011; Neri, Nicola/G-3991-2012; Rotondo, Marcello/I-6043-2012; Bellini, Fabio/D-1055-2009; Peters, Klaus/C-2728-2008; de Groot, Nicolo/A-2675-2009; Lista, Luca/C-5719-2008; de Sangro, Riccardo/J-2901-2012; Sarti, Alessio/I-2833-2012; Patrignani, Claudia/C-5223-2009; Kravchenko, Evgeniy/F-5457-2015; Roe, Natalie/A-8798-2012; M, Saleem/B-9137-2013; Cavallo, Nicola/F-8913-2012; Forti, Francesco/H-3035-2011; Mir, Lluisa-Maria/G-7212-2015; Grancagnolo, Sergio/J-3957-2015; Calabrese, Roberto/G-4405-2015; Lusiani, Alberto/N-2976-2015; Lusiani, Alberto/A-3329-2016; Luppi, Eleonora/A-4902-2015; Monge, Maria Roberta/G-9127-2012; Kolomensky, Yury/I-3510-2015; Negrini, Matteo/C-8906-2014; Lo Vetere, Maurizio/J-5049-2012; Martinez Vidal, F*/L-7563-2014; Morandin, Mauro/A-3308-2016; Saeed, Mohammad Alam/J-7455-2012; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016 OI Della Ricca, Giuseppe/0000-0003-2831-6982; Di Lodovico, Francesca/0000-0003-3952-2175; Neri, Nicola/0000-0002-6106-3756; Rotondo, Marcello/0000-0001-5704-6163; Bellini, Fabio/0000-0002-2936-660X; Peters, Klaus/0000-0001-7133-0662; de Sangro, Riccardo/0000-0002-3808-5455; Sarti, Alessio/0000-0001-5419-7951; Patrignani, Claudia/0000-0002-5882-1747; Forti, Francesco/0000-0001-6535-7965; Mir, Lluisa-Maria/0000-0002-4276-715X; Grancagnolo, Sergio/0000-0001-8490-8304; Calabrese, Roberto/0000-0002-1354-5400; Lusiani, Alberto/0000-0002-6876-3288; Lusiani, Alberto/0000-0002-6876-3288; Luppi, Eleonora/0000-0002-1072-5633; Monge, Maria Roberta/0000-0003-1633-3195; Kolomensky, Yury/0000-0001-8496-9975; Negrini, Matteo/0000-0003-0101-6963; Lo Vetere, Maurizio/0000-0002-6520-4480; Martinez Vidal, F*/0000-0001-6841-6035; Morandin, Mauro/0000-0003-4708-4240; Saeed, Mohammad Alam/0000-0002-3529-9255; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636 NR 18 TC 116 Z9 116 U1 0 U2 3 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 PY 2004 VL 69 IS 1 AR 011102 DI 10.1103/PhysRevD.69.011102 PG 6 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 771LA UT WOS:000188785800002 ER PT J AU Beacom, JF Bell, NF Hooper, D Pakvasa, S Weiler, TJ AF Beacom, JF Bell, NF Hooper, D Pakvasa, S Weiler, TJ TI Sensitivity to theta(13) and delta in the decaying astrophysical neutrino scenario SO PHYSICAL REVIEW D LA English DT Article ID LONG-BASE-LINE; SUPERBEAM EXPERIMENTS; STERILE NEUTRINOS; OSCILLATIONS; CP AB We have previously shown that the decay of high-energy neutrinos from distant astrophysical sources would be revealed by flavor ratios that deviate strongly from the phi(nue):phi(numu):phi(nutau)=1:1:1 expected from oscillations alone. Here we show that the deviations are significantly larger when the mixing angle theta(13) and the CP phase delta are allowed to be nonzero. If neutrinos decay, this could allow measurement of theta(13) and delta in IceCube and other near-term neutrino telescopes. C1 Fermilab Natl Accelerator Lab, NASA Fermilab Astrophys Ctr, Batavia, IL 60510 USA. Univ Oxford, Dept Astrophys, Denys Wilkinson Lab, Oxford OX1 3RH, England. Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 USA. Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA. RP Fermilab Natl Accelerator Lab, NASA Fermilab Astrophys Ctr, POB 500, Batavia, IL 60510 USA. OI Beacom, John/0000-0002-0005-2631 NR 34 TC 69 Z9 69 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 PY 2004 VL 69 IS 1 AR 017303 DI 10.1103/PhysRevD.69.017303 PG 3 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 771LA UT WOS:000188785800071 ER PT J AU Cahn, RN Trilling, GH AF Cahn, RN Trilling, GH TI Experimental limits on the width of the reported Theta(1540)(+) SO PHYSICAL REVIEW D LA English DT Article ID POSITIVE-STRANGENESS; PHOTOPRODUCTION; NUCLEON; BARYON AB Using data on K+ collisions on xenon and deuterium we derive values and limits on the width of the reported Theta(1540)(+) exotic baryon resonance. The xenon experiment gives a width of 0.9+/-0.3 MeV. The other experiments give upper limits in the range 1-4 MeV. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Lawrence Berkeley Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA. NR 15 TC 116 Z9 116 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 PY 2004 VL 69 IS 1 AR 011501 DI 10.1103/PhysRevD.69.011501 PG 3 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 771LA UT WOS:000188785800006 ER PT J AU Chekanov, S Derrick, M Krakauer, D Loizides, JH 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 Montanari, A Nania, R Palmonari, F Pesci, A Sartorelli, G Zichichi, A Aghuzumtsyan, G Bartsch, D Brock, I Goers, S Hartmann, H Hilger, E Irrgang, P Jakob, HP Kappes, A Katz, UF Kind, O Meyer, U Paul, E Rautenberg, J Renner, R Stifutkin, A Tandler, J Voss, KC Wang, M 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 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 Adler, V Bauerdick, LAT Behrens, U Bloch, I Borras, K Chiochia, V Dannheim, D Drews, G Fourletova, J Fricke, U Geiser, A Gottlicher, P Gutsche, O Haas, T Hain, W Hartner, GF Hillert, S Kahle, B Kotz, U Kowalski, H Kramberger, G Labes, H Lelas, D Lohr, B Mankel, R Melzer-Pellmann, IA Nguyen, CN Notz, D Nuncio-Quiroz, AE Petrucci, MC Polini, A Raval, A Rurua, L Schneekloth, U Stoesslein, U Wolf, G Youngman, C Zeuner, W Schlenstedt, S Barbagli, G Gallo, E Genta, C Pelfer, PG Bamberger, A Benen, A Coppola, N Bell, M Bussey, PJ Doyle, AT Hamilton, J Hanlon, S Lee, SW Lupi, A Saxon, DH Skillicorn, IO Gialas, I Bodmann, B Carli, T Holm, U Klimek, K Krumnack, N Lohrmann, E Milite, M Salehi, H Schleper, P Stonjek, S Wick, K Ziegler, A Ziegler, A Collins-Tooth, C Foudas, C Goncalo, R Long, KR Tapper, AD Cloth, P Filges, D Nagano, K Tokushuku, K Yamada, S Yamazaki, Y Kataoka, M Barakbaev, AN Boos, EG Pokrovskiy, NS Zhautykov, BO Lim, H Son, D Piotrzkowski, K Barreiro, F Glasman, C Gonzalez, O Labarga, L del Peso, J Tassi, E Terron, J Vazquez, M Barbi, M Corriveau, F Gliga, S Lainesse, J Padhi, S Stairs, DG Walsh, R 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 Coppola, N Grijpink, S Koffeman, E Kooijman, P Maddox, E Pellegrino, A Schagen, S Tiecke, H Velthuis, JJ Wiggers, L de Wolf, E Brummer, N Bylsma, B Durkin, LS Ling, TY Cooper-Sarkar, AM Cottrell, A Devenish, RCE Ferrando, J Grzelak, G Gwenlan, C Patel, S Sutton, MR Walczak, R Bertolin, A 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 Metlica, F Oh, BY 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 Kuze, M Abe, T Fusayasu, T Kagawa, S Kohno, T Tawara, T Yamashita, T Hamatsu, R Hirose, T Inuzuka, M Kaji, H Kitamura, S Matsuzawa, K Nishimura, T Arneodo, M Ferrero, MI Monaco, V Ruspa, M Sacchi, R Solano, A Koop, T Levman, GM Martin, JF Mirea, A Butterworth, JM Hall-Wilton, R Jones, TW Lightwood, MS Targett-Adams, C Ciborowski, J Ciesielski, R Luzniak, P Nowak, RJ Pawlak, JM Sztuk, J Tymieniecka, T Ukleja, A Ukleja, J Zarnecki, AF Adamus, M Plucinski, P Eisenberg, Y Gladilin, LK Hochman, D Karshon, U Riveline, M Kcira, D Lammers, S Li, L Reeder, DD Rosin, M Savin, AA Smith, WH Deshpande, A Dhawan, S Straub, PB Bhadra, S Catterall, CD Fourletov, S Hartner, G Menary, S Soares, M Standage, J AF Chekanov, S Derrick, M Krakauer, D Loizides, JH 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 Montanari, A Nania, R Palmonari, F Pesci, A Sartorelli, G Zichichi, A Aghuzumtsyan, G Bartsch, D Brock, I Goers, S Hartmann, H Hilger, E Irrgang, P Jakob, HP Kappes, A Katz, UF Kind, O Meyer, U Paul, E Rautenberg, J Renner, R Stifutkin, A Tandler, J Voss, KC Wang, M 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 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 Adler, V Bauerdick, LAT Behrens, U Bloch, I Borras, K Chiochia, V Dannheim, D Drews, G Fourletova, J Fricke, U Geiser, A Gottlicher, P Gutsche, O Haas, T Hain, W Hartner, GF Hillert, S Kahle, B Kotz, U Kowalski, H Kramberger, G Labes, H Lelas, D Lohr, B Mankel, R Melzer-Pellmann, IA Nguyen, CN Notz, D Nuncio-Quiroz, AE Petrucci, MC Polini, A Raval, A Rurua, L Schneekloth, U Stoesslein, U Wolf, G Youngman, C Zeuner, W Schlenstedt, S Barbagli, G Gallo, E Genta, C Pelfer, PG Bamberger, A Benen, A Coppola, N Bell, M Bussey, PJ Doyle, AT Hamilton, J Hanlon, S Lee, SW Lupi, A Saxon, DH Skillicorn, IO Gialas, I Bodmann, B Carli, T Holm, U Klimek, K Krumnack, N Lohrmann, E Milite, M Salehi, H Schleper, P Stonjek, S Wick, K Ziegler, A Ziegler, A Collins-Tooth, C Foudas, C Goncalo, R Long, KR Tapper, AD Cloth, P Filges, D Nagano, K Tokushuku, K Yamada, S Yamazaki, Y Kataoka, M Barakbaev, AN Boos, EG Pokrovskiy, NS Zhautykov, BO Lim, H Son, D Piotrzkowski, K Barreiro, F Glasman, C Gonzalez, O Labarga, L del Peso, J Tassi, E Terron, J Vazquez, M Barbi, M Corriveau, F Gliga, S Lainesse, J Padhi, S Stairs, DG Walsh, R 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 Coppola, N Grijpink, S Koffeman, E Kooijman, P Maddox, E Pellegrino, A Schagen, S Tiecke, H Velthuis, JJ Wiggers, L de Wolf, E Brummer, N Bylsma, B Durkin, LS Ling, TY Cooper-Sarkar, AM Cottrell, A Devenish, RCE Ferrando, J Grzelak, G Gwenlan, C Patel, S Sutton, MR Walczak, R Bertolin, A 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 Metlica, F Oh, BY 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 Kuze, M Abe, T Fusayasu, T Kagawa, S Kohno, T Tawara, T Yamashita, T Hamatsu, R Hirose, T Inuzuka, M Kaji, H Kitamura, S Matsuzawa, K Nishimura, T Arneodo, M Ferrero, MI Monaco, V Ruspa, M Sacchi, R Solano, A Koop, T Levman, GM Martin, JF Mirea, A Butterworth, JM Hall-Wilton, R Jones, TW Lightwood, MS Targett-Adams, C Ciborowski, J Ciesielski, R Luzniak, P Nowak, RJ Pawlak, JM Sztuk, J Tymieniecka, T Ukleja, A Ukleja, J Zarnecki, AF Adamus, M Plucinski, P Eisenberg, Y Gladilin, LK Hochman, D Karshon, U Riveline, M Kcira, D Lammers, S Li, L Reeder, DD Rosin, M Savin, AA Smith, WH Deshpande, A Dhawan, S Straub, PB Bhadra, S Catterall, CD Fourletov, S Hartner, G Menary, S Soares, M Standage, J CA ZEUS Collaboration TI Measurement of D*(+/-) production in deep inelastic e(+/-)p scattering at DESY HERA SO PHYSICAL REVIEW D LA English DT Article ID HEAVY-QUARK PRODUCTION; MONTE-CARLO GENERATOR; DYNAMICAL PARTON DISTRIBUTIONS; FLAVOR STRUCTURE FUNCTIONS; CENTRAL TRACKING DETECTOR; PROTON STRUCTURE-FUNCTION; ENERGY HADRON-COLLISIONS; INITIAL-STATE RADIATION; ZEUS BARREL CALORIMETER; SMALL-X AB Inclusive production of D*(+/-) (2010) mesons in deep inelastic scattering has been measured with the ZEUS detector at DESY HERA using an integrated luminosity of 81.9 pb-1. The decay channel D*(+)-->D(0)pi(+) with D-0-->K(-)pi(+) and corresponding antiparticle decay were used to identify D-* mesons. Differential D-* cross sections with 1.5rho rho SO PHYSICAL REVIEW D LA English DT Article ID DECAYS; ASYMMETRIES AB Recent experimental results on B-->rhorho decays indicate that the CP asymmetry Srho +rho - will give an interesting determination of alpha=arg[-(VtdVtb*)/(VudVub*)]. In the limit when the rho width is neglected, the B-->pipi isospin analysis can also be applied to B-->rhorho, once an angular analysis is used to separate transversity modes. The present bound on the shift of Srho +rho - from the true sin 2alpha is already stronger than it is for Spi +pi -. We point out a subtle violation of the isospin relations when the two rho mesons are observed with different invariant masses, and how to constrain this effect experimentally. C1 Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA. Univ Calif Berkeley, Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. Weizmann Inst Sci, Dept Particle Phys, IL-76100 Rehovot, Israel. Stanford Univ, Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RP Falk, AF (reprint author), Johns Hopkins Univ, Dept Phys & Astron, 3400 N Charles St, Baltimore, MD 21218 USA. EM falk@jhu.edu; zligeti@lbl.gov; yosef.nir@weizmann.ac.il; quinn@slac.stanford.edu NR 13 TC 48 Z9 48 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 PY 2004 VL 69 IS 1 AR 011502 DI 10.1103/PhysRevD.69.011502 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 771LA UT WOS:000188785800007 ER PT J AU Garmash, A Abe, K Abe, K Abe, T Adachi, I Aihara, H Akatsu, M Asano, Y Aushev, T Bakich, AM Ban, Y Bedny, I Behera, PK Bizjak, I Bondar, A Bozek, A Bracko, M Browder, TE Casey, BCK Chang, P Chao, Y Chen, KF Cheon, BG Chistov, R Choi, SK Choi, Y Chuvikov, A Danilov, M Dash, M Dong, LY Drutskoy, A Eidelman, S Eiges, V Fukunaga, C Gabyshev, N Gershon, T Golob, B Gordon, A Guo, R Haba, J Hagner, C Hara, T Hastings, NC Hayashii, H Hazumi, M Higuchi, I Hinz, L Hokuue, T Hoshi, Y Hou, WS Huang, HC Igarashi, Y Iijima, T Inami, K Itoh, R Iwasaki, H Iwasaki, M Iwasaki, Y Jang, HK Kang, JH Kang, JS Katayama, N Kawai, H Kawasaki, T Kichimi, H Kim, DW Kim, HJ Kim, H Kim, SK Kinoshita, K Korpar, S Krizan, P Krokovny, P Kuzmin, A Kwon, YJ Leder, G Lee, SH Li, J Lin, SW MacNaughton, J Majumder, G Mandl, F Matsumoto, H Matyja, A Mitaroff, W Miyata, H Moloney, GR Mori, T Nagasaka, Y Nakadaira, T Nakano, E Nakao, M Nam, JW Natkaniec, Z Nishida, S Nitoh, O Ohshima, T Okabe, T Okuno, S Olsen, SL Ostrowicz, W Ozaki, H Palka, H Park, CW Park, H Park, KS Parslow, N Piilonen, LE Rozanska, M Sagawa, H Saitoh, S Sakai, Y Sarangi, TR Satapathy, M Satpathy, A Schneider, O Schumann, J Schwanda, C Schwartz, AJ Semenov, S Senyo, K Seuster, R Sevior, ME Shibuya, H Shwartz, B Sidorov, V Singh, JB Soni, N Stanic, S Staric, M Sugi, A Sumisawa, K Sumiyoshi, T Suzuki, S Suzuki, SY Swain, SK Takasaki, F Tamai, K Tamura, N Tanaka, J Tanaka, M Teramoto, Y Tomura, T Trabelsi, K Tsuboyama, T Tsukamoto, T Uehara, S Unno, Y Uno, S Varner, G Varvell, KE Wang, CH Wang, MZ Watanabe, Y Won, E Yabsley, BD Yamada, Y Yamaguchi, A Yamamoto, H Yamashita, Y Yamauchi, M Yanai, H Yuan, Y Yusa, Y Zhang, J Zhang, ZP Zhilich, V Zontar, D AF Garmash, A Abe, K Abe, K Abe, T Adachi, I Aihara, H Akatsu, M Asano, Y Aushev, T Bakich, AM Ban, Y Bedny, I Behera, PK Bizjak, I Bondar, A Bozek, A Bracko, M Browder, TE Casey, BCK Chang, P Chao, Y Chen, KF Cheon, BG Chistov, R Choi, SK Choi, Y Chuvikov, A Danilov, M Dash, M Dong, LY Drutskoy, A Eidelman, S Eiges, V Fukunaga, C Gabyshev, N Gershon, T Golob, B Gordon, A Guo, R Haba, J Hagner, C Hara, T Hastings, NC Hayashii, H Hazumi, M Higuchi, I Hinz, L Hokuue, T Hoshi, Y Hou, WS Huang, HC Igarashi, Y Iijima, T Inami, K Itoh, R Iwasaki, H Iwasaki, M Iwasaki, Y Jang, HK Kang, JH Kang, JS Katayama, N Kawai, H Kawasaki, T Kichimi, H Kim, DW Kim, HJ Kim, H Kim, SK Kinoshita, K Korpar, S Krizan, P Krokovny, P Kuzmin, A Kwon, YJ Leder, G Lee, SH Li, J Lin, SW MacNaughton, J Majumder, G Mandl, F Matsumoto, H Matyja, A Mitaroff, W Miyata, H Moloney, GR Mori, T Nagasaka, Y Nakadaira, T Nakano, E Nakao, M Nam, JW Natkaniec, Z Nishida, S Nitoh, O Ohshima, T Okabe, T Okuno, S Olsen, SL Ostrowicz, W Ozaki, H Palka, H Park, CW Park, H Park, KS Parslow, N Piilonen, LE Rozanska, M Sagawa, H Saitoh, S Sakai, Y Sarangi, TR Satapathy, M Satpathy, A Schneider, O Schumann, J Schwanda, C Schwartz, AJ Semenov, S Senyo, K Seuster, R Sevior, ME Shibuya, H Shwartz, B Sidorov, V Singh, JB Soni, N Stanic, S Staric, M Sugi, A Sumisawa, K Sumiyoshi, T Suzuki, S Suzuki, SY Swain, SK Takasaki, F Tamai, K Tamura, N Tanaka, J Tanaka, M Teramoto, Y Tomura, T Trabelsi, K Tsuboyama, T Tsukamoto, T Uehara, S Unno, Y Uno, S Varner, G Varvell, KE Wang, CH Wang, MZ Watanabe, Y Won, E Yabsley, BD Yamada, Y Yamaguchi, A Yamamoto, H Yamashita, Y Yamauchi, M Yanai, H Yuan, Y Yusa, Y Zhang, J Zhang, ZP Zhilich, V Zontar, D CA Belle Collaboration TI Study of B meson decays to three-body charmless hadronic final states SO PHYSICAL REVIEW D LA English DT Article ID SEARCH AB We report results of a study of charmless B meson decays to three-body Kpipi, KKpi and KKK final states. Measurements of branching fractions for B decays to K(+(0))pi(+)pi(-), K+K+K-, (KK+K-)-K-0, (K+KSKS0)-K-0 and (KSKSKS0)-K-0-K-0 final states are presented. The decays B-0-->(KK+K-)-K-0, B+-->(K+KSKS0)-K-0 and B-0-->(KSKSKS0)-K-0-K-0 are observed for the first time. We also report evidence for B+-->K(+)K(-)pi(+) decay. For the three-body final states K(0)K(+)pi(-), K(S)(0)K(S)(0)pi(+), K(+)K(+)pi(-) and K(-)pi(+)pi(+), 90% confidence level upper limits are reported. Finally, we discuss the possibility of using the three-body B-0-->(KSK+K-)-K-0 decay for CP violation studies. The results are obtained with a 78 fb(-1) data sample collected at the Y(4S) resonance by the Belle detector operating at the KEKB asymmetric energy e(+)e(-) collider. C1 Budker Inst Nucl Phys, Novosibirsk 630090, Russia. Aomori Univ, Aomori, Japan. Chiba Univ, Chiba, Japan. Chuo Univ, Tokyo 112, Japan. Univ Cincinnati, Cincinnati, OH 45221 USA. Goethe Univ Frankfurt, D-6000 Frankfurt, Germany. Gyeongsang Natl Univ, Chinju, South Korea. Univ Hawaii, Honolulu, HI 96822 USA. Natl Lab High Energy Phys, KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, Japan. Hiroshima Inst Technol, Hiroshima, Japan. Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China. Inst High Energy Phys, Vienna, Austria. Inst Theoret & Expt Phys, Moscow 117259, Russia. Jozef Stefan Inst, Ljubljana, Slovenia. Kanagawa Univ, Yokohama, Kanagawa, Japan. Korea Univ, Seoul 136701, South Korea. Kyoto Univ, Kyoto, Japan. Kyungpook Natl Univ, Taegu 702701, South Korea. Univ Lausanne, Inst Phys Hautes Energies, Lausanne, Switzerland. Univ Ljubljana, Ljubljana, Slovenia. Univ Maribor, SLO-2000 Maribor, Slovenia. Univ Melbourne, Parkville, Vic 3052, Australia. Nagoya Univ, Nagoya, Aichi, Japan. Nara Womens Univ, Nara 630, Japan. Natl Kaohsiung Normal Univ, Kaohsiung, Taiwan. Natl Lien Ho Inst Technol, Miaoli, Taiwan. Natl Taiwan Univ, Dept Phys, Taipei 10764, Taiwan. H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland. Nihon Dent Coll, Niigata, Japan. Niigata Univ, Niigata, Japan. Osaka City Univ, Osaka 558, Japan. Osaka Univ, Osaka, Japan. Panjab Univ, Chandigarh 160014, India. Peking Univ, Beijing 100871, Peoples R China. Princeton Univ, Princeton, NJ 08545 USA. Brookhaven Natl Lab, RIKEN, Res Ctr, Upton, NY 11973 USA. Saga Univ, Saga 840, Japan. Univ Sci & Technol China, Hefei 230026, Peoples R China. Seoul Natl Univ, Seoul, South Korea. Sungkyunkwan Univ, Suwon, South Korea. Univ Sydney, Sydney, NSW 2006, Australia. Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India. Toho Univ, Funabashi, Chiba 274, Japan. Tohoku Gakuin Univ, Tagajo, Miyagi, Japan. Tohoku Univ, Sendai, Miyagi 980, Japan. Univ Tokyo, Dept Phys, Tokyo 113, Japan. Tokyo Inst Technol, Tokyo 152, Japan. Tokyo Metropolitan Univ, Tokyo 158, Japan. Tokyo Univ Agr & Technol, Tokyo, Japan. Toyama Natl Coll Maritime Technol, Toyama, Japan. Univ Tsukuba, Tsukuba, Ibaraki 305, Japan. Utkal Univ, Bhubaneswar 751004, Orissa, India. Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA. Yokkaichi Univ, Yokaichi, Japan. Yonsei Univ, Seoul 120749, South Korea. RP Budker Inst Nucl Phys, Novosibirsk 630090, Russia. RI Abe, Kazuo/F-6576-2010; Aihara, Hiroaki/F-3854-2010; Huang, Hsuan-Cheng/C-7266-2011; Nitoh, Osamu/C-3522-2013; Gordon, Ascelin/I-9184-2012; Kim, Sun Kee/G-2042-2015; Danilov, Mikhail/C-5380-2014; Krokovny, Pavel/G-4421-2016; Chistov, Ruslan/B-4893-2014; Drutskoy, Alexey/C-8833-2016; OI Krizan, Peter/0000-0002-4967-7675; CHANG, PAO-TI/0000-0003-4064-388X; Aihara, Hiroaki/0000-0002-1907-5964; Huang, Hsuan-Cheng/0000-0002-3386-0934; Gordon, Ascelin/0000-0002-0648-0346; Kim, Sun Kee/0000-0002-0013-0775; Danilov, Mikhail/0000-0001-9227-5164; Krokovny, Pavel/0000-0002-1236-4667; Chistov, Ruslan/0000-0003-1439-8390; Drutskoy, Alexey/0000-0003-4524-0422; Moloney, Glenn/0000-0002-3539-3233 NR 26 TC 50 Z9 50 U1 0 U2 6 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 PY 2004 VL 69 IS 1 AR 012001 DI 10.1103/PhysRevD.69.012001 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 771LA UT WOS:000188785800010 ER PT J AU Gelis, F Venugopalan, R AF Gelis, F Venugopalan, R TI Large mass q(q)over-bar production from the color glass condensate SO PHYSICAL REVIEW D LA English DT Article ID HEAVY-QUARK PRODUCTION; GLUON DISTRIBUTION-FUNCTIONS; NUCLEUS-NUCLEUS COLLISIONS; CROSS-SECTION; RENORMALIZATION-GROUP; HADRONIC COLLISIONS; TRANSVERSE-MOMENTUM; SATURATION MOMENTUM; SEMIHARD PROCESSES; ENERGY-DEPENDENCE AB We compute quark-antiquark pair production in the context of the color glass condensate model for central heavy-ion collisions. The calculation is performed analytically to leading order in the density of hard sources present in the projectiles, and is applicable to quarks with a mass large compared to the saturation momentum. The formulas derived in this paper are compared to expressions derived in the framework of collinearly factorized perturbative QCD and in k(perpendicular to) factorization models. We comment on the breaking of k(perpendicular to) factorization which occurs beyond leading order in our approach. C1 CEA Saclay, DSM, Serv Phys Theor, F-91191 Gif Sur Yvette, France. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP CEA Saclay, DSM, Serv Phys Theor, Bat 774, F-91191 Gif Sur Yvette, France. NR 68 TC 74 Z9 74 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 PY 2004 VL 69 IS 1 AR 014019 DI 10.1103/PhysRevD.69.014019 PG 13 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 771LA UT WOS:000188785800040 ER PT J AU Hewett, JL Sadri, D AF Hewett, JL Sadri, D TI Supersymmetric extra dimensions: Gravitino effects in selectron pair production SO PHYSICAL REVIEW D LA English DT Article ID LIGHT GRAVITINO; SUPERLIGHT GRAVITINO; COSMOLOGICAL CONSTANT; SUPERGRAVITY THEORY; E(+)E(-) COLLIDERS; STANDARD MODEL; LOWER LIMIT; SIGNALS; BREAKING; MASS AB We examine the phenomenological consequences of a supersymmetric bulk in the scenario of large extra dimensions. We assume that supersymmetry is realized in the bulk and study the interactions of the resulting bulk gravitino Kaluza-Klein (KK) tower of states, with supersymmetry breaking on the brane inducing a light mass for the zero-mode gravitino. We derive the 4D effective theory, including the couplings of the bulk gravitino KK states to fermions and their scalar superpartners. The virtual exchange of the gravitino KK states in selectron pair production in polarized e(+)e(-) collisions is then examined. We find that the leading order operator for this exchange is dimension 6, in contrast with that of bulk graviton KK exchange which induces a dimension 8 operator at lowest order. The resulting kinematic distributions for selectron production are dramatically altered from those in D=4 supersymmetric scenarios and can lead to an enormous sensitivity to the fundamental higher-dimensional Planck scale, of order (20-25)xroots. C1 Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. NR 99 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 2470-0010 EI 2470-0029 J9 PHYS REV D JI Phys. Rev. D PD JAN PY 2004 VL 69 IS 1 AR 015001 DI 10.1103/PhysRevD.69.015001 PG 18 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 771LA UT WOS:000188785800051 ER PT J AU Hubeny, VE Rangamani, M Ross, SF AF Hubeny, VE Rangamani, M Ross, SF TI Causal inheritance in plane wave quotients SO PHYSICAL REVIEW D LA English DT Article ID STRING THEORY; BLACK-HOLE; SINGULARITIES; SPACETIME AB We investigate the appearance of closed timelike curves in quotients of plane waves along spacelike isometries. First we formulate a necessary and sufficient condition for a quotient of a general space-time to preserve stable causality. We explicitly show that the plane waves are stably causal; in passing, we observe that some pp waves are not even distinguishing. We then consider the classification of all quotients of the maximally supersymmetric ten-dimensional plane wave under a spacelike isometry, and show that the quotient will lead to closed timelike curves iff the isometry involves a translation along the u direction. The appearance of these closed timelike curves is thus connected to the special properties of the light cones in plane wave space-times. We show that all other quotients preserve stable causality. C1 Stanford Univ, Dept Phys, Stanford, CA 94305 USA. Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA. Univ Durham, Dept Math Sci, Durham DH1 3LE, England. RP Hubeny, VE (reprint author), Stanford Univ, Dept Phys, Stanford, CA 94305 USA. EM veronika@itp.stanford.edu; mukund@socrates.berkeley.edu; S.F.Ross@durham.ac.uk NR 33 TC 19 Z9 19 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 PY 2004 VL 69 IS 2 AR 024007 DI 10.1103/PhysRevD.69.024007 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 772WK UT WOS:000188864800033 ER PT J AU Ioffe, BL Kharzeev, DE AF Ioffe, BL Kharzeev, DE TI Recent puzzles in the production of heavy quarkonia SO PHYSICAL REVIEW D LA English DT Article ID E(+)E(-) COLLIDERS; J/PSI PRODUCTION AB Recently, several surprising experimental observations in the production of heavy quarkonium have been reported. In e(+)e(-) annihilation at roots=10.6 GeV, the Belle Collaboration finds that J/psi mesons are predominantly produced in association with an extra (c) over barc pair, with sigma(e(+)e(-)-->J/psi(c) over barc)/sigma(e(+)e(-)-->J/psiX)=0.59(-0.13)(+0.15)+/-0.12, and the BaBar Collaboration reports that the produced J/psi's have mostly longitudinal polarization. In (p) over barp collisions at the Fermilab Tevatron, the CDF Collaboration reported an excess of J/psi and psi' mesons at high p(perpendicular to) over the perturbative QCD predictions; the nonperturbative approach of nonrelativistic QCD can accommodate the magnitude of the production cross section but not the observed experimental polarization of quarkonia. In this note we propose possible solutions to these puzzles and devise further experimental tests. C1 Inst Theoret & Expt Phys, Moscow 117218, Russia. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Ioffe, BL (reprint author), Inst Theoret & Expt Phys, B Cheremushkinskaya 25, Moscow 117218, Russia. NR 19 TC 7 Z9 7 U1 0 U2 1 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 PY 2004 VL 69 IS 1 AR 014016 DI 10.1103/PhysRevD.69.014016 PG 4 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 771LA UT WOS:000188785800037 ER PT J AU Kulesza, A Sterman, G Vogelsang, W AF Kulesza, A Sterman, G Vogelsang, W TI Joint resummation for Higgs boson production SO PHYSICAL REVIEW D LA English DT Article ID TRANSVERSE-MOMENTUM DISTRIBUTIONS; TO-LEADING-ORDER; DEEP-INELASTIC SCATTERING; HADRON-HADRON COLLISIONS; QCD CORRECTIONS; LOGARITHMIC CONTRIBUTIONS; HARD PROCESSES; BACK JETS; COLLIDERS; LHC AB We study the application of the joint resummation formalism to Higgs boson production via gluon-gluon fusion at the CERN LHC, defining inverse transforms by analytic continuation. We work at next-to-leading logarithmic accuracy. We find that at low Q(T) the resummed Higgs Q(T) distributions are comparable in the joint and pure-Q(T) formalisms, with a relatively small influence from threshold enhancement in this range. We find a modest (about ten percent) decrease in the inclusive cross section, relative to pure threshold resummation. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, RIKEN BNL Res Ctr & Nucl Theory, Upton, NY 11973 USA. RP Univ Karlsruhe, Inst Theoret Teilchenphys, D-76131 Karlsruhe, Germany. NR 56 TC 75 Z9 75 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 PY 2004 VL 69 IS 1 AR 014012 DI 10.1103/PhysRevD.69.014012 PG 12 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 771LA UT WOS:000188785800033 ER PT J AU Lee, S Sin, SJ AF Lee, S Sin, SJ TI Chiral rings and Gliozzi-Scherk-Olive projection in orbifolds SO PHYSICAL REVIEW D LA English DT Article ID TACHYON MASS AB The Gliozzi-Scherk-Olive (GSO) projection in the twisted sector of an orbifold background is sometimes subtle, and incompatible descriptions are found in the literature. Here, from the equivalence of partition functions in Neveu-Schwarz-Ramond and Green-Schwarz formalisms, we give a simple rule of the GSO projection for the chiral rings of string theory in C-3/Z(n). The necessary constructions of chiral rings are given by explicit mode analysis. C1 Hanyang Univ, Dept Phys, Seoul 133791, South Korea. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94305 USA. RP Lee, S (reprint author), Hanyang Univ, Dept Phys, Seoul 133791, South Korea. NR 11 TC 8 Z9 8 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 PY 2004 VL 69 IS 2 AR 026003 DI 10.1103/PhysRevD.69.026003 PG 7 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 772WK UT WOS:000188864800054 ER PT J AU Lehtinen, NG Gorham, PW Jacobson, AR Roussel-Dupre, RA AF Lehtinen, NG Gorham, PW Jacobson, AR Roussel-Dupre, RA TI FORTE satellite constraints on ultrahigh energy cosmic particle fluxes SO PHYSICAL REVIEW D LA English DT Article ID TRANSIONOSPHERIC PULSE PAIRS; STRUCTURE-FUNCTION F2; NEUTRINO INTERACTIONS; RAY SPECTRUM; VHF SIGNALS; PHENOMENOLOGY; SHOWERS; HERA; SCATTERING; EMISSIONS AB The FORTE (Fast On-orbit Recording of Transient Events) satellite records bursts of electromagnetic waves arising from near the Earth's surface in the radio frequency (rf) range of 30 to 300 MHz with a dual polarization antenna. We investigate the possible rf signature of ultrahigh energy cosmic-ray particles in the form of coherent Cherenkov radiation from cascades in ice. We calculate the sensitivity of the FORTE satellite to ultrahigh energy neutrino (UHE nu) fluxes at different energies beyond the Greisen-Zatsepin-Kuzmin cutoff. Some constraints on supersymmetry model parameters are also estimated due to the limits that FORTE sets on the UHE neutralino flux. The FORTE database consists of over 4 million recorded events to date, including in principle some events associated with UHE nu. We search for candidate FORTE events in the period from September 1997 to December 1999. The candidate production mechanism is via coherent VHF radiation from a UHE nu shower in the Greenland ice sheet. We demonstrate a high efficiency for selection against lightning and anthropogenic backgrounds. A single candidate out of several thousand raw triggers survives all cuts, and we set limits on the corresponding particle fluxes assuming this event represents our background level. C1 Univ Hawaii Manoa, Dept Phys & Astron, Honolulu, HI 96822 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Lehtinen, NG (reprint author), Univ Hawaii Manoa, Dept Phys & Astron, Honolulu, HI 96822 USA. NR 62 TC 131 Z9 132 U1 1 U2 6 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 PY 2004 VL 69 IS 1 AR 013008 DI 10.1103/PhysRevD.69.013008 PG 14 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 771LA UT WOS:000188785800021 ER PT J AU Smy, MB Ashie, Y Fukuda, S Fukuda, Y Ishihara, K Itow, Y Koshio, Y Minamino, A Miura, M Moriyama, S Nakahata, M Namba, T Nambu, R Obayashi, Y Sakurai, N Shiozawa, M Suzuki, Y Takeuchi, H Takeuchi, Y Yamada, S Ishitsuka, M Kajita, T Kaneyuki, K Nakayama, S Okada, A Ooyabu, T Saji, C Desai, S Earl, M Kearns, E Messier, MD Stone, JL Sulak, LR Walter, CW Wang, W Goldhaber, M Barszczak, T Casper, D Gajewski, W Kropp, WR Mine, S Liu, DW Sobel, HW Vagins, MR Gago, A Ganezer, KS Hill, J Keig, WE Kim, JY Lim, IT Ellsworth, RW Tasaka, S Kibayashi, A Learned, JG Matsuno, S Takemori, D Hayato, Y Ichikawa, AK Ishii, T Kameda, J Kobayashi, T Maruyama, T Nakamura, K Nitta, K Oyama, Y Sakuda, M Totsuka, Y Yoshida, M Iwashita, T Suzuki, AT Inagaki, T Kato, I Nakaya, T Nishikawa, K Haines, TJ Dazeley, S Hatakeyama, S Svoboda, R Blaufuss, E Goodman, JA Guillian, G Sullivan, GW Turcan, D Scholberg, K Habig, A Ackermann, M Jung, CK Kato, T Kobayashi, K Martens, K Malek, M Mauger, C McGrew, C Sharkey, E Viren, B Yanagisawa, C Toshito, T Mitsuda, C Miyano, K Shibata, T Kajiyama, Y Nagashima, Y Takita, M Kim, HI Kim, SB Yoo, J Okazawa, H Ishizuka, T Choi, Y Seo, HK Etoh, M Gando, Y Hasegawa, T Inoue, K Shirai, J Suzuki, A Koshiba, M Hatakeyama, Y Ichikawa, Y Koike, M Nishijima, K Ishino, H Morii, M Nishimura, R Watanabe, Y Kielczewska, D Berns, HG Boyd, SC Stachyra, AL Wilkes, RJ AF Smy, MB Ashie, Y Fukuda, S Fukuda, Y Ishihara, K Itow, Y Koshio, Y Minamino, A Miura, M Moriyama, S Nakahata, M Namba, T Nambu, R Obayashi, Y Sakurai, N Shiozawa, M Suzuki, Y Takeuchi, H Takeuchi, Y Yamada, S Ishitsuka, M Kajita, T Kaneyuki, K Nakayama, S Okada, A Ooyabu, T Saji, C Desai, S Earl, M Kearns, E Messier, MD Stone, JL Sulak, LR Walter, CW Wang, W Goldhaber, M Barszczak, T Casper, D Gajewski, W Kropp, WR Mine, S Liu, DW Sobel, HW Vagins, MR Gago, A Ganezer, KS Hill, J Keig, WE Kim, JY Lim, IT Ellsworth, RW Tasaka, S Kibayashi, A Learned, JG Matsuno, S Takemori, D Hayato, Y Ichikawa, AK Ishii, T Kameda, J Kobayashi, T Maruyama, T Nakamura, K Nitta, K Oyama, Y Sakuda, M Totsuka, Y Yoshida, M Iwashita, T Suzuki, AT Inagaki, T Kato, I Nakaya, T Nishikawa, K Haines, TJ Dazeley, S Hatakeyama, S Svoboda, R Blaufuss, E Goodman, JA Guillian, G Sullivan, GW Turcan, D Scholberg, K Habig, A Ackermann, M Jung, CK Kato, T Kobayashi, K Martens, K Malek, M Mauger, C McGrew, C Sharkey, E Viren, B Yanagisawa, C Toshito, T Mitsuda, C Miyano, K Shibata, T Kajiyama, Y Nagashima, Y Takita, M Kim, HI Kim, SB Yoo, J Okazawa, H Ishizuka, T Choi, Y Seo, HK Etoh, M Gando, Y Hasegawa, T Inoue, K Shirai, J Suzuki, A Koshiba, M Hatakeyama, Y Ichikawa, Y Koike, M Nishijima, K Ishino, H Morii, M Nishimura, R Watanabe, Y Kielczewska, D Berns, HG Boyd, SC Stachyra, AL Wilkes, RJ CA Super-Kamiokande Collaboration TI Precise measurement of the solar neutrino day-night and seasonal variation in Super-Kamiokande-I SO PHYSICAL REVIEW D LA English DT Article ID OSCILLATIONS; DETECTOR; MATTER AB The time variation of the elastic scattering rate of solar neutrinos with electrons in Super-Kamiokande-I was fit to the variations expected from active two-neutrino oscillations. The best fit in the large mixing angle solution has a mixing angle of tan(2)theta=0.55 and a mass squared difference of Deltam(2)=6.3x10(-5) eV(2) between the two neutrino mass eigenstates. The fitted day-night asymmetry of -1.8+/-1.6(stat)(-1.2)(+1.3)(syst)% has improved statistical precision over previous measurements and agrees well with the expected asymmetry of -2.1%. C1 Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA. Univ Tokyo, Inst Cosm Ray Res, Kamioka Observ, Gifu 5061205, Japan. Univ Tokyo, Inst Cosm Ray Res, Res Ctr Cosm Neutrinos, Chiba 2778582, Japan. Boston Univ, Dept Phys, Boston, MA 02215 USA. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Calif State Univ Dominguez Hills, Dept Phys, Carson, CA 90747 USA. Chonnam Natl Univ, Dept Phys, Kwangju 500757, South Korea. George Mason Univ, Dept Phys, Fairfax, VA 22030 USA. Gifu Univ, Dept Phys, Gifu 5011193, Japan. Univ Hawaii, Dept Phys & Astron, Honolulu, HI 96822 USA. Natl Lab High Energy Phys, KEK, High Energy Accelerator Res Org, Inst Particle & Nucl Studies, Tsukuba, Ibaraki 3050801, Japan. Kobe Univ, Dept Phys, Kobe, Hyogo 6578501, Japan. Kyoto Univ, Dept Phys, Kyoto 6068502, Japan. Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87544 USA. Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA. Univ Maryland, Dept Phys, College Pk, MD 20742 USA. MIT, Dept Phys, Cambridge, MA 02139 USA. Univ Minnesota, Dept Phys, Duluth, MN 55812 USA. SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA. Nagoya Univ, Dept Phys, Aichi 4648602, Japan. Niigata Univ, Dept Phys, Niigata 9502181, Japan. Osaka Univ, Dept Phys, Niigata 9502181, Japan. Seoul Natl Univ, Dept Phys, Seoul 151742, South Korea. Shizuoka Seika Coll, Shizuoka 4258611, Japan. Shizuoka Univ, Dept Syst Engn, Shizuoka 4328561, Japan. Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea. Tohoku Univ, Res Ctr Neutrino Sci, Sendai, Miyagi 9808578, Japan. Univ Tokyo, Tokyo 1130033, Japan. Tokai Univ, Dept Phys, Kanagawa 2591292, Japan. Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan. Univ Warsaw, Inst Expt Phys, PL-00681 Warsaw, Poland. Univ Washington, Dept Phys, Seattle, WA 98195 USA. RP Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA. RI Yoo, Jonghee/K-8394-2016; Takeuchi, Yasuo/A-4310-2011; Nakamura, Kenzo/F-7174-2010; Sobel, Henry/A-4369-2011; Suzuki, Yoichiro/F-7542-2010; Martens, Kai/A-4323-2011; Wilkes, R.Jeffrey/E-6011-2013; Kim, Soo-Bong/B-7061-2014; Sakurai, Nobuyuki/M-5009-2014; Koshio, Yusuke/C-2847-2015; Kibayashi, Atsuko/K-7327-2015; Obayashi, Yoshihisa/A-4472-2011 OI Sakurai, Nobuyuki/0000-0002-1002-217X; Koshio, Yusuke/0000-0003-0437-8505; NR 15 TC 179 Z9 179 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 PY 2004 VL 69 IS 1 AR 011104 DI 10.1103/PhysRevD.69.011104 PG 5 WC Astronomy & Astrophysics; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 771LA UT WOS:000188785800004 ER PT J AU Hoover, WG Hoover, CG Merritt, EC AF Hoover, WG Hoover, CG Merritt, EC TI Smooth-particle applied mechanics: Conservation of angular momentum with tensile stability and velocity averaging SO PHYSICAL REVIEW E LA English DT Article ID HYDRODYNAMICS; SPH AB Smooth-particle applied mechanics (SPAM) provides several approaches to approximate solutions of the continuum equations for both fluids and solids. Though many of the usual formulations conserve mass, (linear) momentum, and energy, the angular momentum is typically not conserved by SPAM. A second difficulty with the usual formulations is that tensile stress states often exhibit an exponentially fast high-frequency short-wavelength instability, "tensile instability." We discuss these twin defects of SPAM and illustrate them for a rotating elastic body. We formulate ways to conserve angular momentum while at the same time delaying the symptoms of tensile instability for many sound-traversal times. These ideas should prove useful in more general situations. C1 Univ Calif Davis, Dept Appl Sci, Livermore, CA 94551 USA. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Dept Mech Engn, Methods Dev Grp, Livermore, CA 94551 USA. RP Hoover, WG (reprint author), Univ Calif Davis, Dept Appl Sci, Livermore, CA 94551 USA. NR 16 TC 9 Z9 9 U1 0 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 2004 VL 69 IS 1 AR 016702 DI 10.1103/PhysRevE.69.016702 PN 2 PG 10 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 773WD UT WOS:000188946700092 PM 14995750 ER PT J AU Loh, KK Kawasaki, K Bishop, AR Lookman, T Saxena, A Nussinov, Z Schmalian, J AF Loh, KK Kawasaki, K Bishop, AR Lookman, T Saxena, A Nussinov, Z Schmalian, J TI Glassy behavior in systems with Kac-type step-function interaction SO PHYSICAL REVIEW E LA English DT Article ID METASTABLE STATES; PHASE-TRANSITIONS; TEMPERATURE; DYNAMICS; MODEL; SUPERCONDUCTORS; DEPENDENCE; SEPARATION; LIQUIDS AB We study a system with a weak, long-ranged repulsive Kac-type step-function interaction within the framework of a replicated effective Phi(4) theory. The occurrence of extensive configurational entropy or an exponentially large number of metastable minima in the free energy (characteristic of a glassy state), is demonstrated. The underlying mechanism of mesoscopic patterning and defect organizations is discussed. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA. Iowa State Univ, Ames Lab, Ames, IA 50011 USA. RP Loh, KK (reprint author), Dune Networks, 28215 Agoura Rd,Suite 100, Agoura Hills, CA 91301 USA. RI Schmalian, Joerg/H-2313-2011 NR 31 TC 9 Z9 9 U1 0 U2 1 PU AMER PHYSICAL SOC PI COLLEGE PK PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA SN 1539-3755 EI 1550-2376 J9 PHYS REV E JI Phys. Rev. E PD JAN PY 2004 VL 69 IS 1 AR 010501 DI 10.1103/PhysRevE.69.010501 PN 1 PG 4 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 773WC UT WOS:000188946500001 PM 14995597 ER PT J AU Rapti, Z Kevrekidis, PG Smerzi, A Bishop, AR AF Rapti, Z Kevrekidis, PG Smerzi, A Bishop, AR TI Variational approach to the modulational instability SO PHYSICAL REVIEW E LA English DT Article ID PERIODIC DISPERSION MANAGEMENT; BOSE-EINSTEIN CONDENSATE; OPTICAL-FIBERS; QUANTUM-THEORY; FESHBACH RESONANCES; DYNAMICS; SOLITONS; SYSTEMS; WAVES; FIELD AB We study the modulational stability of the nonlinear Schrodinger equation using a time-dependent variational approach. Within this framework, we derive ordinary differential equations (ODE's) for the time evolution of the amplitude and phase of modulational perturbations. Analyzing the ensuing ODE's, we rederive the classical modulational instability criterion. The case (relevant to applications in optics and Bose-Einstein condensation) where the coefficients of the equation are time dependent, is also examined. C1 Univ Massachusetts, Dept Math & Stat, Amherst, MA 01003 USA. Univ Trent, Ist Nazl Fis Mat, BEC, CRS, I-38050 Trento, Italy. Univ Trent, Dipartimento Fis, I-38050 Trento, Italy. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA. RP Rapti, Z (reprint author), Univ Massachusetts, Dept Math & Stat, Amherst, MA 01003 USA. NR 36 TC 22 Z9 23 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 2004 VL 69 IS 1 AR 017601 DI 10.1103/PhysRevE.69.017601 PN 2 PG 4 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 773WD UT WOS:000188946700101 PM 14995759 ER PT J AU Schroeder, CB Esarey, E van Tilborg, J Leemans, WP AF Schroeder, CB Esarey, E van Tilborg, J Leemans, WP TI Theory of coherent transition radiation generated at a plasma-vacuum interface SO PHYSICAL REVIEW E LA English DT Article ID LASER WAKEFIELD ACCELERATOR; ELECTRON-BEAM; PULSES; BREAKING; CHANNELS; APERTURE; BUNCHES AB Transition radiation generated by an electron beam, produced by a laser wakefield accelerator operating in the self-modulated regime, crossing the plasma-vacuum boundary is considered. The angular distributions and spectra are calculated for both the incoherent and the coherent radiation. The effects of the longitudinal and transverse momentum distributions on the differential energy spectra are examined. Diffraction radiation from the finite transverse extent of the plasma is considered and shown to strongly modify the spectra and energy radiated for long-wavelength radiation. This method of transition radiation generation has the capability of producing high peak power terahertz radiation, of order 100 muJ/pulse at the plasma-vacuum interface, which is several orders of magnitude beyond current state-of-the-art terahertz sources. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Tech Univ Eindhoven, NL-5600 MB Eindhoven, Netherlands. RP Schroeder, CB (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 36 TC 79 Z9 80 U1 1 U2 8 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 2004 VL 69 IS 1 AR 016501 DI 10.1103/PhysRevE.69.016501 PN 2 PG 12 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 773WD UT WOS:000188946700071 PM 14995729 ER PT J AU Wieczorek, S Lenstra, D AF Wieczorek, S Lenstra, D TI Spontaneously excited pulses in an optically driven semiconductor laser SO PHYSICAL REVIEW E LA English DT Article ID EXCITABILITY; SYSTEMS; BIFURCATIONS; FEEDBACK; NOISE AB In optically injected semiconductor lasers, intrinsic quantum noise alone, namely, the spontaneous emission and the shot noise, are capable of exciting intensity multipulses from a steady state operation. Noisy lasers exhibit self-pulsations in the locking region of the corresponding deterministic system. The interpulse time statistics are studied in parameter regions near k-homoclinic (Shilnikov) bifurcations where the corresponding deterministic model exhibits single-, double-, and triple-pulse excitability. These statistics differ significantly among each other, and they could be used to characterize regions of different multipulse excitability in a real laser device. C1 Vrije Univ Amsterdam, FEW, Dept Phys & Astron, NL-1081 HV Amsterdam, Netherlands. COBRA Res Inst, Eindhoven, Netherlands. RP Wieczorek, S (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA. EM smwiecz@sandia.gov NR 21 TC 9 Z9 9 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 2004 VL 69 IS 1 AR 016218 DI 10.1103/PhysRevE.69.016218 PN 2 PG 5 WC Physics, Fluids & Plasmas; Physics, Mathematical SC Physics GA 773WD UT WOS:000188946700046 ER PT J AU Babzien, M Ben-Zvi, I Pavlishin, I Pogorelsky, IV Yakimenko, VE Zholents, AA Zolotorev, MS AF Babzien, M Ben-Zvi, I Pavlishin, I Pogorelsky, IV Yakimenko, VE Zholents, AA Zolotorev, MS TI Optical stochastic cooling for RHIC using optical parametric amplification SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID GENERATION; CO2-LASER; CDGEAS2 AB We propose using an optical parametric amplifier, with a similar to12 mum wavelength, for optical-stochastic cooling of Au-79 ions in the Relativistic Heavy Ion Collider. While the bandwidth of this amplifier is comparable to that of a Ti:sapphire laser, it has a higher average output power. Its wavelength is longer than that of the laser amplifiers previously considered for such an application. This longer wavelength permits a longer undulator period and higher magnetic field, thereby generating a larger signal from the pickup undulator and ensuring a more efficient interaction in the kicker undulator, both being essential elements in cooling moderately relativistic ions. The transition to a longer wavelength also relaxes the requirements for stability of the path length during ion-beam transport between pickup and kicker undulators. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Accelerator & Fus Res, Berkeley, CA 94720 USA. RP Babzien, M (reprint author), Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. NR 24 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 1098-4402 J9 PHYS REV SPEC TOP-AC JI Phys. Rev. Spec. Top.-Accel. Beams PD JAN PY 2004 VL 7 IS 1 AR 012801 DI 10.1103/PhysRevSTAB.7.012801 PG 6 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 778WX UT WOS:000189265300006 ER PT J AU Hahn, H AF Hahn, H TI Interpretation of coupling impedance bench measurements SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB Coupling impedance values of accelerator components can be obtained from standard bench measurements based on the coaxial wire method. Longitudinal impedance is obtained with one wire and the transverse impedance with a twin wire inserted into the "device under test." The coupling impedance follows from the interpretation of the scattering coefficients from a network analyzer. In this paper, models and formulas applicable to the interpretation of the data are collected and reviewed. The paper is focused on lumped and distributed kicker magnets, for which a simulated measurement is numerically analyzed with the results graphically presented. This study suggests that the application of the standard lumped formula or the simple log formula for distributed impedances is appropriate. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Hahn, H (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 33 TC 3 Z9 3 U1 0 U2 0 PU AMER 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 2004 VL 7 IS 1 AR 012001 DI 10.1103/PhysRevSTAB.7.012001 PG 9 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 778WX UT WOS:000189265300004 ER PT J AU Huang, Z Stupakov, G Zolotorev, M AF Huang, Z Stupakov, G Zolotorev, M TI Calculation and optimization of laser acceleration in vacuum SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB Extraordinarily high fields generated by focused lasers are envisioned to accelerate particles to high energies. In this paper, we develop a new method to calculate laser acceleration in vacuum based on the energy exchange arising from the interference of the laser field with the radiation field of the particle. We apply this method to a simple accelerating structure, a perfectly conducting screen with a round hole, and show how to optimize the energy gain with respect to the hole radius, laser angle, and spot size, as well as the transverse profile of the laser. Limitations and energy scaling of this acceleration method are also discussed. C1 Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Beam Phys, Berkeley, CA 94720 USA. RP Huang, Z (reprint author), Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. NR 13 TC 8 Z9 8 U1 0 U2 2 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 2004 VL 7 IS 1 AR 011302 DI 10.1103/PhysRevSTAB.7.011302 PG 8 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 778WX UT WOS:000189265300003 ER PT J AU Kandrup, HE Sideris, IV Bohn, CL AF Kandrup, HE Sideris, IV Bohn, CL TI Chaos and the continuum limit in charged particle beams SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article ID THERMAL-EQUILIBRIUM; SYSTEMS; DYNAMICS AB We investigate the validity of the Vlasov-Poisson equations for calculating properties of systems of N charged particles governed by time-independent Hamiltonians. Through numerical experiments we verify that there is a smooth convergence toward a continuum limit as N --> infinity and the particle charge q --> 0 such that the system charge Q = qN remains fixed. However, in real systems N and q are always finite, and the assumption of the continuum limit must be questioned. We demonstrate that Langevin simulations can be used to assess the importance of discreteness effects, i.e., granularity, in systems for which the physical particle number N is too large to enable orbit integrations based on direct summation of interparticle forces. We then consider a beam bunch in thermal equilibrium and apply Langevin techniques to assess whether the continuum limit can be safely applied to this system. In the process we show, especially for systems supporting a sizable population of chaotic orbits that roam globally through phase space, that for the continuum limit to be valid, N must sometimes be surprisingly large. Otherwise the influence of granularity on particle orbits cannot be ignored. C1 Univ Florida, Dept Astron, Gainesville, FL 32611 USA. Univ Florida, Dept Phys, Gainesville, FL 32611 USA. Univ Florida, Inst Fundamental Theory, Gainesville, FL 32611 USA. No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Bohn, CL (reprint author), Univ Florida, Dept Astron, Gainesville, FL 32611 USA. EM clbohn@niu.edu NR 32 TC 6 Z9 6 U1 0 U2 1 PU AMER 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 2004 VL 7 IS 1 AR 014202 DI 10.1103/PhysRevSTAB.7.014202 PG 11 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 778WX UT WOS:000189265300008 ER PT J AU Montag, C Kewisch, J AF Montag, C Kewisch, J TI Commissioning of a first-order matched transition jump at the Brookhaven Relativistic Heavy Ion Collider SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB When accelerating gold ions in the Relativistic Heavy Ion Collider (RHIC) the transition energy must be crossed. For this purpose, RHIC uses a set of correction quadrupoles and special power supplies which can reverse polarity in less than 40 ms. These quadrupoles are used to produce dispersion bumps which increase the transition energy as the beam approaches transition. The change of polarity will then jump the transition energy across the beam energy. This paper describes the commissioning of the RHIC first-order matched transition crossing system. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Montag, C (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 14 TC 2 Z9 2 U1 0 U2 0 PU AMER 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 2004 VL 7 IS 1 AR 011001 DI 10.1103/PhysRevSTAB.7.011001 PG 6 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 778WX UT WOS:000189265300001 ER PT J AU Sekutowicz, J Castro, P Gossel, A Kreps, G Lange, R Matheisen, A Moller, WD Peters, HB Proch, D Schlarb, H Schreiber, S Simrock, S Wendt, M Baboi, N Ferrario, M Huening, M Liepe, M Pagani, C Zheng, S AF Sekutowicz, J Castro, P Gossel, A Kreps, G Lange, R Matheisen, A Moller, WD Peters, HB Proch, D Schlarb, H Schreiber, S Simrock, S Wendt, M Baboi, N Ferrario, M Huening, M Liepe, M Pagani, C Zheng, S TI Test of two Nb superstructure prototypes SO PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS LA English DT Article AB An alternative layout of the TESLA linear collider (Technical Design Report, DESY Report No. 2001-011, 2001), based on weakly coupled multicell superconducting structures (superstructures), significantly reduces the investment cost due to a simplification in the rf system of the main accelerator. In January 1999, preparation of the beam test of the superstructure began in order to prove the feasibility of this layout. Progress in the preparation was reported frequently in Proceedings of TESLA Collaboration Meetings. Last year, two superstructures were installed in the Tesla Test Facility linac at DESY to experimentally verify methods to balance the accelerating gradient in a weakly coupled system, the stability of the energy gain for the entire train of bunches in macropulses, and the damping of higher order modes. We present results of the first cold and beam test of these two Nb prototypes. C1 DESY, D-22603 Hamburg, Germany. SLAC, Menlo Pk, CA 94025 USA. Ist Nazl Fis Nucl, I-00044 Frascati, Italy. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Cornell Univ, Ithaca, NY 14853 USA. INFN Milano, I-20090 Segrate, Italy. Tsing Hua Univ, Beijing 100084, Peoples R China. RP Sekutowicz, J (reprint author), DESY, Notkestr 85, D-22603 Hamburg, Germany. OI PAGANI, CARLO/0000-0003-4962-5741; Simrock, Stefan/0000-0002-1116-5316 NR 7 TC 4 Z9 4 U1 0 U2 2 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 2004 VL 7 IS 1 AR 012002 DI 10.1103/PhysRevSTAB.7.012002 PG 8 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA 778WX UT WOS:000189265300005 ER PT S AU Smith, AV Armstrong, DJ Alford, WJ Bowers, MS AF Smith, AV Armstrong, DJ Alford, WJ Bowers, MS BE Osinski, M Amano, H Henneberger, F TI Simulations of chi((2)) nonlinear optical devices with comparisons to laboratory performance SO PHYSICS AND SIMULATION OF OPTOELECTRONIC DEVICES XII 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 XII CY JAN 26-29, 2004 CL San Jose, CA SP SPIE, USA Res Off ID PARAMETRIC OSCILLATOR; SOFTWARE; MIRO AB We have developed public domain numerical models of nonlinear three-wave mixing in birefringent crystals that include diffraction and dispersion. They are suitable for detailed and realistic modeling of mixing for both a single crystal pass and for multiple passes appropriate for a crystal in a resonant cavity. We routinely compare our models with laboratory devices, usually achieving excellent agreement. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Smith, AV (reprint author), Sandia Natl Labs, Dept 1118, 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 0-8194-5257-2 J9 P SOC PHOTO-OPT INS PY 2004 VL 5349 BP 172 EP 175 DI 10.1117/12.540318 PG 4 WC Optics; Physics, Applied SC Optics; Physics GA BAJ84 UT WOS:000222604400021 ER PT S AU Shan, W Walukiewicz, W Yu, KM Ager, JW Wu, J Beeman, J Scapulla, MA Dubon, OD Haller, EE Nabetani, Y Becla, P AF Shan, W Walukiewicz, W Yu, KM Ager, JW Wu, J Beeman, J Scapulla, MA Dubon, OD Haller, EE Nabetani, Y Becla, P BE Osinski, M Amano, H Henneberger, F TI Effect of oxygen on the electronic band structure of II-O-VI alloys SO PHYSICS AND SIMULATION OF OPTOELECTRONIC DEVICES XII SE Proceedings of SPIE LA English DT Proceedings Paper CT Conference on Physics and Simulation of Optoelectronic Devices XII CY JAN 26-29, 2004 CL San Jose, CA SP SPIE, USA Res Off DE oxygen; ZnOxSe1-x; Zn1-yMnyOxTe1-x; II-VI compounds; band-anticrossing; highly mismatched alloys; band structure; pressure effect; photovoltaic ID ION-IMPLANTATION; GAINNAS ALLOYS; SOLAR-CELLS; NITROGEN; EFFICIENCY; TRANSITIONS; IMPURITIES; PRESSURE; ENERGY; GAAS AB We have studied the effects of composition and hydrostatic pressure on the direct optical transitions at the F point of the Brillouin zone in MBE-grown ZnOxSe1-x and ion-implantation-synthesized Zn1-yMnyOxT1-x, alloys. We observe a large O-induced band-gap reduction and a change in the pressure dependence of the fundamental band gap of the II-O-VI alloys. The effects are similar to those previously observed and extensively studied in highly mismatched III-N-V alloys. Our results are well explained in terms of the band anticrossing model that considers an anticrossing interaction between the highly localized oxygen states and the extended states of the conduction band of II-VI compounds. The O-induced modification of the conduction band structure offers an interesting possibility of using small amounts of 0 to engineer the optoelectronic properties of group II-O-VI alloys. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA. EM WShan@lbl.gov RI Yu, Kin Man/J-1399-2012; OI Yu, Kin Man/0000-0003-1350-9642; Ager, Joel/0000-0001-9334-9751 NR 35 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 0-8194-5257-2 J9 PROC SPIE PY 2004 VL 5349 BP 426 EP 434 DI 10.1117/12.529297 PG 9 WC Optics; Physics, Applied SC Optics; Physics GA BAJ84 UT WOS:000222604400048 ER PT B AU Wangler, TP AF Wangler, TP BE Wiedemann, H Brandt, D Perevedentsev, EA Kurokawa, SI TI Ion linacs SO PHYSICS AND TECHNOLOGY OF LINEAR ACCELERATOR SYSTEMS LA English DT Proceedings Paper CT Joint USPAS/CAS/Japan/Russia Accelerated School on Physics and Technology of Linear Accelerator Systems CY NOV 06-14, 2002 CL Long Beach, CA SP USPAS, CAS, Japan Accelerated Sch, Russia Acceletated Sch ID HIGH-SPEED IONS; HIGH VOLTAGES AB An overview is presented of accelerator physics and technology of ion linear accelerators. Topics include early history, basic principles, medium- and high-velocity accelerating structures, the radiofrequency quadrupole (RFQ), modem ion-linac architecture, longitudinal and transverse single-particle beam dynamics, multiparticle dynamics and space charge, and recent results on beam halo. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Wangler, TP (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 34 TC 5 Z9 6 U1 0 U2 0 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA PO BOX 128 FARRER RD, SINGAPORE 9128, SINGAPORE BN 981-238-463-4 PY 2004 BP 1 EP 23 PG 23 WC Instruments & Instrumentation; Physics, Particles & Fields SC Instruments & Instrumentation; Physics GA BCJ57 UT WOS:000229670500001 ER PT B AU Caporaso, GJ AF Caporaso, GJ BE Wiedemann, H Brandt, D Perevedentsev, EA Kurokawa, SI TI Modern trends in induction accelerator technology SO PHYSICS AND TECHNOLOGY OF LINEAR ACCELERATOR SYSTEMS LA English DT Proceedings Paper CT Joint USPAS/CAS/Japan/Russia Accelerated School on Physics and Technology of Linear Accelerator Systems CY NOV 06-14, 2002 CL Long Beach, CA SP USPAS, CAS, Japan Accelerated Sch, Russia Acceletated Sch AB Recent advances in solid-state modulators now permit the design of a new class of high current accelerators. These new accelerators will be able to operate in burst mode at frequencies of several MHz with unprecedented flexibility and precision in pulse format. These new modulators can drive accelerators to high average powers that far exceed those of any other technology and can be used to enable precision beam manipulations. New insulator technology combined with novel pulse-forming lines and switching may enable the construction of a new type of high gradient, high current accelerator. Recent developments in these areas will be reviewed. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Caporaso, GJ (reprint author), Lawrence Livermore Natl Lab, POB 808,L-645, Livermore, CA 94550 USA. NR 5 TC 0 Z9 0 U1 0 U2 1 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA PO BOX 128 FARRER RD, SINGAPORE 9128, SINGAPORE BN 981-238-463-4 PY 2004 BP 24 EP 59 DI 10.1142/9789812703064_0002 PG 36 WC Instruments & Instrumentation; Physics, Particles & Fields SC Instruments & Instrumentation; Physics GA BCJ57 UT WOS:000229670500002 ER PT B AU Stupakov, GV AF Stupakov, GV BE Wiedemann, H Brandt, D Perevedentsev, EA Kurokawa, SI TI Wakefields and instabilities in linacs SO PHYSICS AND TECHNOLOGY OF LINEAR ACCELERATOR SYSTEMS LA English DT Proceedings Paper CT Joint USPAS/CAS/Japan/Russia Accelerated School on Physics and Technology of Linear Accelerator Systems CY NOV 06-14, 2002 CL Long Beach, CA SP USPAS, CAS, Japan Accelerated Sch, Russia Acceletated Sch ID FIELDS AB Electromagnetic interaction of a beam with surrounding environment is described in terms of wakes and impedances. After a general introduction of the concept of the wake, we focus on the case of the beam interaction with irises of accelerating structures in the linac. Using the linac short-range wake, we study the beam breakup instability and discuss methods of its suppression. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Stupakov, GV (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. NR 13 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 981-238-463-4 PY 2004 BP 180 EP 212 DI 10.1142/9789812703064_0007 PG 33 WC Instruments & Instrumentation; Physics, Particles & Fields SC Instruments & Instrumentation; Physics GA BCJ57 UT WOS:000229670500007 ER PT B AU Colby, ER AF Colby, ER BE Wiedemann, H Brandt, D Perevedentsev, EA Kurokawa, SI TI Power sources for accelerators beyond X-band SO PHYSICS AND TECHNOLOGY OF LINEAR ACCELERATOR SYSTEMS LA English DT Proceedings Paper CT Joint USPAS/CAS/Japan/Russia Accelerated School on Physics and Technology of Linear Accelerator Systems CY NOV 06-14, 2002 CL Long Beach, CA SP USPAS, CAS, Japan Accelerated Sch, Russia Acceletated Sch ID LASER; KLYSTRON AB The availability of power sources suitable for particle acceleration is a key factor determining what acceleration techniques are practical. We examine the fundamental limitations of slow- and fast-wave devices, two beam accelerators, and lasers as power sources for accelerators in the frequency range beyond X-band. C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA USA. RP Colby, ER (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd,Mail Stop 07, Menlo Pk, CA USA. NR 31 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 981-238-463-4 PY 2004 BP 289 EP 300 DI 10.1142/9789812703064_0010 PG 12 WC Instruments & Instrumentation; Physics, Particles & Fields SC Instruments & Instrumentation; Physics GA BCJ57 UT WOS:000229670500010 ER PT J AU Chekanov, S Derrick, M Krakauer, D Loizides, JH Magill, S Musgrave, B Repond, J Yoshida, R Mattingly, MCK Antonioli, P Bari, G Basile, A Bellagamba, L Boscherini, D Bruni, A Bruni, G Romeo, GC Cifarelli, L Cindolo, F Contin, A Corradi, M De Pasquale, S Giusti, P Lacobucci, G Margotti, A Montanari, A Nania, R Palmonari, F Pesci, A Sartorelli, G Zichichi, A Aghuzumtsyan, G Bartsch, D Brock, I Goers, S Hartmann, H Hilger, E Irrgang, P Jakob, HP Kappes, A Katz, UF Kind, O Meyer, U Paul, E Rautenberg, J Renner, R Stifutkin, A Tandler, J Voss, KC Wang, M 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, Y 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 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 Adler, V Bauerdick, LAT Behrens, U Bloch, I Borras, K Chiochia, V Dannheim, D Drews, G Fourletova, J Fricke, U Geiser, A Gottlicher, P Gutsche, O Haas, T Hain, W Hartner, GF Hillert, S Kahle, B Kotz, U Kowalski, H Kramberger, G Labes, H Lelas, D Lohr, B Mankel, R Melzer-Pellmann, IA Moritz, M Nguyen, CN Notz, D Petrucci, MC Polini, A Raval, A Rurua, L Schneekloth, U Selonke, E Stoesslein, U Wessoleck, H Wolf, G Youngman, C Zeuner, W Schlenstedt, S Barbagli, G Gallo, E Genta, C Pelfer, PG Bamberger, A Benen, A Coppola, N Bell, M Bussey, PJ Doyle, AT Hamilton, J Hanlon, S Lee, SW Lupi, A 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 Tapper, AD Cloth, P Filges, D Nagano, K Tokushuku, K Yamada, S Yamazaki, Y Kataoka, M Barakbaev, AN Boos, EG Pokrovskiy, NS Zhautykov, BO Lim, H Son, D Piotrzkowski, K Barreiro, F Glasman, C Gonzalez, O Labarga, L del Peso, J Tassi, E Terron, J Vazquez, M Barbi, M Corriveau, F Gliga, S Lainesse, J Padhi, S Stairs, DG Walsh, R 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 Coppola, N Grijpink, S Koffeman, E Kooijman, P Maddox, E Pellegrino, A Schagen, S Tiecke, H Velthuis, JJ Wiggers, L de Wolf, E Brummer, N Bylsma, B Durkin, LS Ling, TY Cooper-Sarkar, AM Cottrell, A Devenish, RCE Ferrando, J Grzelak, G Gwenlan, C Patel, S Sutton, MR Walczak, R Bertolin, A 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 Metlica, E Oh, BY 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 Kuze, M Abe, T Fusayasu, T Kagawa, S Kohno, T Tawara, T Yamashita, T Hamatsu, R Hirose, T Inuzuka, M Kaji, H Kitamura, S Matsuzawa, K Nishimura, T Arneodo, M Ferrero, MI Monaco, V Ruspa, M Sacchi, R Solano, A Koop, T Levman, GM Martin, JF Mirea, A Butterworth, JM Hall-Wilton, R Jones, TW Lightwood, MS West, BJ Ciborowski, J Ciesielski, R Luzniak, P Nowak, RJ Pawlak, JM Sztuk, J Tymieniecka, T Ukleja, A Ukleja, J Zarnecki, AF Adamus, M Plucinski, P Eisenberg, Y Gladilin, LK Hochman, D Karshon, U Riveline, M Kcira, D Lammers, S Li, L Reeder, DD Rosin, M Savin, AA Smith, WH Deshpande, A Dhawan, S Straub, PB Bhadra, S Catterall, CD Fourletov, S Hartner, G Menary, S Soares, M Standage, J AF Chekanov, S Derrick, M Krakauer, D Loizides, JH Magill, S Musgrave, B Repond, J Yoshida, R Mattingly, MCK Antonioli, P Bari, G Basile, A Bellagamba, L Boscherini, D Bruni, A Bruni, G Romeo, GC Cifarelli, L Cindolo, F Contin, A Corradi, M De Pasquale, S Giusti, P Lacobucci, G Margotti, A Montanari, A Nania, R Palmonari, F Pesci, A Sartorelli, G Zichichi, A Aghuzumtsyan, G Bartsch, D Brock, I Goers, S Hartmann, H Hilger, E Irrgang, P Jakob, HP Kappes, A Katz, UF Kind, O Meyer, U Paul, E Rautenberg, J Renner, R Stifutkin, A Tandler, J Voss, KC Wang, M 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, Y 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 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 Adler, V Bauerdick, LAT Behrens, U Bloch, I Borras, K Chiochia, V Dannheim, D Drews, G Fourletova, J Fricke, U Geiser, A Gottlicher, P Gutsche, O Haas, T Hain, W Hartner, GF Hillert, S Kahle, B Kotz, U Kowalski, H Kramberger, G Labes, H Lelas, D Lohr, B Mankel, R Melzer-Pellmann, IA Moritz, M Nguyen, CN Notz, D Petrucci, MC Polini, A Raval, A Rurua, L Schneekloth, U Selonke, E Stoesslein, U Wessoleck, H Wolf, G Youngman, C Zeuner, W Schlenstedt, S Barbagli, G Gallo, E Genta, C Pelfer, PG Bamberger, A Benen, A Coppola, N Bell, M Bussey, PJ Doyle, AT Hamilton, J Hanlon, S Lee, SW Lupi, A 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 Tapper, AD Cloth, P Filges, D Nagano, K Tokushuku, K Yamada, S Yamazaki, Y Kataoka, M Barakbaev, AN Boos, EG Pokrovskiy, NS Zhautykov, BO Lim, H Son, D Piotrzkowski, K Barreiro, F Glasman, C Gonzalez, O Labarga, L del Peso, J Tassi, E Terron, J Vazquez, M Barbi, M Corriveau, F Gliga, S Lainesse, J Padhi, S Stairs, DG Walsh, R 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 Coppola, N Grijpink, S Koffeman, E Kooijman, P Maddox, E Pellegrino, A Schagen, S Tiecke, H Velthuis, JJ Wiggers, L de Wolf, E Brummer, N Bylsma, B Durkin, LS Ling, TY Cooper-Sarkar, AM Cottrell, A Devenish, RCE Ferrando, J Grzelak, G Gwenlan, C Patel, S Sutton, MR Walczak, R Bertolin, A 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 Metlica, E Oh, BY 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 Kuze, M Abe, T Fusayasu, T Kagawa, S Kohno, T Tawara, T Yamashita, T Hamatsu, R Hirose, T Inuzuka, M Kaji, H Kitamura, S Matsuzawa, K Nishimura, T Arneodo, M Ferrero, MI Monaco, V Ruspa, M Sacchi, R Solano, A Koop, T Levman, GM Martin, JF Mirea, A Butterworth, JM Hall-Wilton, R Jones, TW Lightwood, MS West, BJ Ciborowski, J Ciesielski, R Luzniak, P Nowak, RJ Pawlak, JM Sztuk, J Tymieniecka, T Ukleja, A Ukleja, J Zarnecki, AF Adamus, M Plucinski, P Eisenberg, Y Gladilin, LK Hochman, D Karshon, U Riveline, M Kcira, D Lammers, S Li, L Reeder, DD Rosin, M Savin, AA Smith, WH Deshpande, A Dhawan, S Straub, PB Bhadra, S Catterall, CD Fourletov, S Hartner, G Menary, S Soares, M Standage, J CA ZEUS Collaboration TI Observation of (KsKs0)-K-0 resonances in deep inelastic scattering at HERA SO PHYSICS LETTERS B LA English DT Article ID CENTRAL TRACKING DETECTOR; ZEUS BARREL CALORIMETER; REAR CALORIMETER; CONSTRUCTION; DESIGN; COLLISIONS; QUARK; MODEL; JETS AB Inclusive (KSKS0)-K-0 production in deep inelastic ep scattering at HERA has been studied with the ZEUS detector using an integrated luminosity of 120 pb(-1). Two states are observed at masses of 1537(-8)(+9) MeV and 1726 +/- 7 MeV, as well as an enhancement around 1300 MeV. The state at 1537 MeV is consistent with the well established f'(2)(1525). The state at 1726 MeV may be the glueball candidate f(0)(1710). However, it's width of 38(-14)(+20) MeV is narrower than 125 +/- 10 MeV observed by previous experiments for the f(0)(1710). (C) 2003 Elsevier B.V. All rights reserved. C1 Argonne Natl Lab, Argonne, IL 60439 USA. Andrews Univ, Berrien Springs, MI 49104 USA. Univ Bologna, Bologna, Italy. INFN, Bologna, Italy. Univ Bonn, Inst Phys, D-5300 Bonn, Germany. Univ Bristol, HH Wills Phys Lab, Bristol, Avon, England. Univ Calabria, Dept Phys, Cosenza, Italy. INFN, Cosenza, Italy. Chonnam Natl Univ, Kwangju, South Korea. Columbia Univ, Nevis Labs, Hudson, NY 10027 USA. Inst Phys Nucl, Krakow, Poland. AGH Univ Sci & Technol, Fac Phys & Nucl Tech, Krakow, Poland. Jagiellonian Univ, Dept Phys, Krakow, Poland. DESY, Deutsch Elekt Synchrotron, Hamburg, Germany. DESY Zeuthen, Zeuthen, Germany. Univ Florence, INFN, Florence, Italy. Univ Freiburg, Fak Phys, Freiburg, Germany. Univ Glasgow, Dept Phys & Astron, Glasgow, Lanark, Scotland. Univ Aegean, Dept Engn Managment & Finance, Aegean, Greece. Univ Hamburg, Inst Phys Expt, Hamburg, Germany. Univ London Imperial Coll Sci Technol & Med, High Energy Nucl Phys Grp, London, England. Forschungszentrum Julich, Inst Kernphys, Julich, Germany. KEK, Inst Particle & Nucl Studies, Tsukuba, Ibaraki, Japan. Minist Educ Sci Kazakhstan, Inst Phys & Technol, Alma Ata, Kazakhstan. Kyungpook Natl Univ, Taejon, South Korea. Catholic Univ Louvain, Inst Phys Nucl, Louvain, Belgium. Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain. McGill Univ, Dept Phys, Montreal, PQ, Canada. Meiji Gakuin Univ, Fac Gen Educ, Yokohama, Kanagawa, Japan. Moscow Engn Phys Inst, Moscow, Russia. Moscow MV Lomonosov State Univ, Inst Phys Nucl, 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. INFN, 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. INFN, 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, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys, Tel Aviv, Israel. Tokyo Inst Technol, Dept Phys, Tokyo, Japan. Univ Tokyo, Dept Phys, Tokyo, Japan. Tokyo Metropolitan Univ, Dept Phys, Tokyo, Japan. Univ Turin, Dipartimento Fis Sperimentale, Turin, Italy. INFN, Turin, Italy. Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada. UCL, Dept Phys & Astron, London, England. Univ Warsaw, Inst Phys Expt, Warsaw, Poland. Inst Nucl Studies, PL-00681 Warsaw, Poland. Weizmann Inst Sci, Dept Particle Phys, Rehovot, Israel. Univ Wisconsin, Dept Phys, Madison, WI 53706 USA. Yale Univ, Dept Phys, New Haven, CT 06520 USA. Univ York, Dept Phys, Toronto, ON M3J 1P3, Canada. RP Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Tassi, Enrico/K-3958-2015; Gladilin, Leonid/B-5226-2011; Suchkov, Sergey/M-6671-2015; dusini, stefano/J-3686-2012; Goncalo, Ricardo/M-3153-2016; Li, Liang/O-1107-2015; Capua, Marcella/A-8549-2015; Wiggers, Leo/B-5218-2015; De Pasquale, Salvatore/B-9165-2008; Wing, Matthew/C-2169-2008; Doyle, Anthony/C-5889-2009; collins-tooth, christopher/A-9201-2012; Gliga, Sebastian/K-4019-2015; Ferrando, James/A-9192-2012; Golubkov, Yury/E-1643-2012; Levchenko, B./D-9752-2012; Proskuryakov, Alexander/J-6166-2012; Dementiev, Roman/K-7201-2012; Katz, Uli/E-1925-2013 OI Gutsche, Oliver/0000-0002-8015-9622; Gladilin, Leonid/0000-0001-9422-8636; dusini, stefano/0000-0002-1128-0664; Goncalo, Ricardo/0000-0002-3826-3442; Li, Liang/0000-0001-6411-6107; Capua, Marcella/0000-0002-2443-6525; Arneodo, Michele/0000-0002-7790-7132; Longhin, Andrea/0000-0001-9103-9936; Heath, Helen/0000-0001-6576-9740; Wiggers, Leo/0000-0003-1060-0520; De Pasquale, Salvatore/0000-0001-9236-0748; Doyle, Anthony/0000-0001-6322-6195; Gliga, Sebastian/0000-0003-1729-1070; Ferrando, James/0000-0002-1007-7816; Katz, Uli/0000-0002-7063-4418 NR 33 TC 11 Z9 11 U1 0 U2 5 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD JAN 1 PY 2004 VL 578 IS 1-2 BP 33 EP 44 DI 10.1016/j.physletb.2003.10.049 PG 12 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 759GW UT WOS:000187730800005 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 Burke, D Burnett, TH Burrows, PN Calcaterra, A Cassell, R Chou, A Cohn, HO Coller, JA Convery, MR Cook, V Cowan, RF Crawford, G Damerell, CJS Daoudi, M de Groot, N de Sangro, R Dong, DN Doser, M Dubois, R Erofeeva, I Eschenburg, V Etzion, E Fahey, S Falciai, D Fernandez, JP Flood, K Frey, R Hart, EL Hasuko, K Hertzbach, SS Huffer, ME Huynh, X 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 Osborne, LS 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, A 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 Burke, D Burnett, TH Burrows, PN Calcaterra, A Cassell, R Chou, A Cohn, HO Coller, JA Convery, MR Cook, V Cowan, RF Crawford, G Damerell, CJS Daoudi, M de Groot, N de Sangro, R Dong, DN Doser, M Dubois, R Erofeeva, I Eschenburg, V Etzion, E Fahey, S Falciai, D Fernandez, JP Flood, K Frey, R Hart, EL Hasuko, K Hertzbach, SS Huffer, ME Huynh, X 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 Osborne, LS 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, A 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 TI First measurement of the double-inclusive B/(B)over-bar hadron energy distribution in e(+)e(-) annihilations, and of angle-dependent moments of the B and (B)over-bar energies SO PHYSICS LETTERS B LA English DT Article ID JETS; DECAYS; RECONSTRUCTION; ALGORITHM AB We have made the first measurement of the double-inclusive B/(B) over bar energy distribution in e(+)e(-) annihilations, using a sample of 400 000 hadronic Z(0)-decay events recorded in the SLD experiment at SLAC between 1996 and 1998. The small and stable SLC beam spot and the CCD-based vertex detector were used to reconstruct B/(B) over bar -decay vertices with high efficiency and purity, and to provide precise measurements of the kinematic quantities used to calculate the B energies in this novel technique. We measured the B/(B) over bar energies with good efficiency and resolution over the full kinematic range. We measured moments of the scaled energies of the B and (B) over bar hadrons vs. the opening angle between them. By comparing these results with perturbative QCD predictions we tested the ansatz of factorisation in heavy-quark production. A recent next-to-leading order calculation reproduces the data. (C) 2003 Elsevier B.V. All rights reserved. C1 Tohoku Univ, Sendai, Miyagi 980, Japan. Brunel Univ, Uxbridge UB8 3PH, Middx, England. Boston Univ, Boston, MA 02215 USA. Univ Colorado, Boulder, CO 80309 USA. Colorado State Univ, Ft Collins, CO 80523 USA. Univ Ferrara, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, Sez Ferrara, I-44100 Ferrara, Italy. Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy. Johns Hopkins Univ, Baltimore, MD 21218 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Univ Massachusetts, Amherst, MA 01003 USA. Univ Mississippi, University, MS 38677 USA. MIT, Cambridge, MA 02139 USA. Moscow MV Lomonosov State Univ, Inst Nucl Phys, Moscow 119899, Russia. Nagoya Univ, Chikusa Ku, Nagoya, Aichi 464, Japan. Univ Oregon, Eugene, OR 97403 USA. Univ Oxford, Oxford OX1 3RH, England. Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy. Univ Perugia, I-06100 Perugia, Italy. Univ London Queen Mary & Westfield Coll, London E1 4NS, England. Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England. Rutgers State Univ, Piscataway, NJ 08855 USA. Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Soongsil Univ, Seoul 156743, South Korea. Univ Tennessee, Knoxville, TN 37996 USA. Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA. Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA. Vanderbilt Univ, Nashville, TN 37235 USA. Univ Washington, Seattle, WA 98105 USA. Univ Wisconsin, Madison, WI 53706 USA. Yale Univ, New Haven, CT 06511 USA. Univ Bristol, Bristol, Avon, England. RP Abe, K (reprint author), Tohoku Univ, Sendai, Miyagi 980, Japan. EM p.burrows@qmul.ac.uk RI de Groot, Nicolo/A-2675-2009; Stahl, Achim/E-8846-2011; de Sangro, Riccardo/J-2901-2012; Calcaterra, Alessandro/P-5260-2015; Frey, Raymond/E-2830-2016 OI Stahl, Achim/0000-0002-8369-7506; de Sangro, Riccardo/0000-0002-3808-5455; Calcaterra, Alessandro/0000-0003-2670-4826; Frey, Raymond/0000-0003-0341-2636 NR 19 TC 0 Z9 0 U1 0 U2 2 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD JAN 1 PY 2004 VL 578 IS 1-2 BP 45 EP 53 DI 10.1016/j.physletb.2003.10.057 PG 9 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 759GW UT WOS:000187730800006 ER PT J AU Brodsky, SJ Frankfurt, L Gilman, R Hiller, JR Miller, GA Piasetzky, E Sargsian, M Strikman, M AF Brodsky, SJ Frankfurt, L Gilman, R Hiller, JR Miller, GA Piasetzky, E Sargsian, M Strikman, M TI Hard photodisintegration of a proton pair in He-3 SO PHYSICS LETTERS B LA English DT Article DE QCD; hard reactions; photodisintegration ID ANGLE ELASTIC-SCATTERING; LARGE MOMENTUM-TRANSFER; MAGNETIC FORM-FACTORS; EXCLUSIVE PROCESSES; 2-BODY PHOTODISINTEGRATION; QUANTUM CHROMODYNAMICS; PION ABSORPTION; DEUTERON PHOTODISINTEGRATION; ISOSPIN DEPENDENCE; PERTURBATIVE QCD AB Hard photodisintegration of the deuteron has been extensively studied in order to understand the dynamics of the transition from hadronic to quark-gluon descriptions of the strong interaction. In this Letter, we discuss the extension of this program to hard photodisintegration of a pp pair in the He-3 nucleus. Experimental confirmation of new features predicted here for the suggested reaction would advance our understanding of hard nuclear reactions. A main prediction, in contrast with low-energy observations, is that the pp breakup cross section is not much smaller than the one for pn break up. In some models, the energy-dependent oscillations observed for pp scattering are predicted to appear in the gamma He-3 --> pp + n reaction. Such an observation would open up a completely new field in studies of color coherence phenomena in hard nuclear reactions. We also demonstrate that, in addition to the energy dependence, the measurement of the light-cone momentum distribution of the recoil neutron provides an independent test of the underlying dynamics of hard disintegration. (C) 2003 Published by Elsevier B.V. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. Tel Aviv Univ, Sackler Fac Exact Sci, Sch Phys & Astron, IL-69978 Tel Aviv, Israel. Rutgers State Univ, Piscataway, NJ 08854 USA. Univ Minnesota, Duluth, MN 55812 USA. Univ Washington, Seattle, WA 98195 USA. Florida Int Univ, Miami, FL 33199 USA. Penn State Univ, University Pk, PA 16802 USA. RP Sargsian, M (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. EM sargsian@fiu.edu NR 49 TC 19 Z9 19 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD JAN 1 PY 2004 VL 578 IS 1-2 BP 69 EP 77 DI 10.1016/j.physletb.2003.10.018 PG 9 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 759GW UT WOS:000187730800009 ER PT J AU Close, FE Page, PR AF Close, FE Page, PR TI The D-*0(D)over-barD(0) threshold resonance SO PHYSICS LETTERS B LA English DT Article DE charmonium; hybrid; molecule ID CHARMONIUM; STATES; MESONS; MOLECULES; BREAKING AB Tests are discussed to distinguish c (c) over bar, hybrid charmonium and molecular interpretations of the narrow Belle resonance at 3872 MeV. (C) 2003 Elsevier B.V. All rights reserved. C1 Univ Oxford, Dept Phys & Theoret Phys, Oxford OX1 3NP, England. Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Close, FE (reprint author), Univ Oxford, Dept Phys & Theoret Phys, 1 Keble Rd, Oxford OX1 3NP, England. RI Page, Philip/L-1885-2015 OI Page, Philip/0000-0002-2201-6703 NR 20 TC 257 Z9 258 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 J9 PHYS LETT B JI Phys. Lett. B PD JAN 1 PY 2004 VL 578 IS 1-2 BP 119 EP 123 DI 10.1016/j.physletb.2003.10.032 PG 5 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 759GW UT WOS:000187730800015 ER PT J AU Sin, SJ AF Sin, SJ TI Comments on the fate of unstable orbifolds SO PHYSICS LETTERS B LA English DT Article AB We study the localized tachyon condensation in their mirror Landau-Ginzburg picture. We completely determine the decay mode of an unstable orbifold C-r/Z(n), r = 1, 2, 3 under the condensation of a tachyon with definite R-charge and mass by extending the Vafa's work hep-th/0111105. Here, we give a simple method that works uniformly for all C-r/Z(n). For C-2/Z(n) where method of toric geometry works, we give a proof of equivalence of our method with toric one. For C-r/Z(n) cases, the orbifolds decay into sum of r far separated orbifolds. (C) 2003 Elsevier B.V. All rights reserved. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94305 USA. Hanyang Univ, Dept Phys, Seoul 133791, South Korea. RP Sin, SJ (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94305 USA. EM sjs@hepth.hanyang.ac.kr OI Sin, Sang-Jin/0000-0003-0556-5871 NR 20 TC 9 Z9 9 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-2693 EI 1873-2445 J9 PHYS LETT B JI Phys. Lett. B PD JAN 1 PY 2004 VL 578 IS 1-2 BP 215 EP 222 DI 10.1016/j.physletb.2003.10.031 PG 8 WC Astronomy & Astrophysics; Physics, Nuclear; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA 759GW UT WOS:000187730800028 ER PT B AU Hu, XS Lal, J Jiao, XS Lurio, LB Narayanan, S AF Hu, XS Lal, J Jiao, XS Lurio, LB Narayanan, S BE Mallamace, F Stanley, HE TI Dynamics at a buried polymer interface SO PHYSICS OF COMPLEX SYSTEMS (NEW ADVANCES AND PERSPECTIVES) SE PROCEEDINGS OF THE INTERNATIONAL SCHOOL OF PHYSICS ENRICO FERMI LA English DT Proceedings Paper CT International School of Physics Enrico Fermi on the Physics of Complex Systems - New Advances and Perspectives CY JUL 01-11, 2003 CL Varenna, ITALY SP Int Sch Phys Enrico Fermi ID FILMS C1 Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA. RP Hu, XS (reprint author), Argonne Natl Lab, Intense Pulsed Neutron Source, Argonne, IL 60439 USA. NR 6 TC 1 Z9 1 U1 0 U2 0 PU I O S PRESS PI AMSTERDAM PA NIEUWE HEMWEG 6B, 1013 BG AMSTERDAM, NETHERLANDS BN 1-58603-445-6 J9 P INT SCH PHYS PY 2004 VL 155 BP 549 EP 555 PG 7 WC Physics, Condensed Matter; Physics, Mathematical SC Physics GA BBV13 UT WOS:000227985100037 ER PT J AU Livescu, D AF Livescu, D TI Compressibility effects on the Rayleigh-Taylor instability growth between immiscible fluids SO PHYSICS OF FLUIDS LA English DT Article ID SINGLE-MODE; STRATIFIED FLUIDS; SYSTEM; NOVA AB The linearized Navier-Stokes equations for a system of superposed immiscible compressible ideal fluids are analyzed. The results of the analysis reconcile the stabilizing and destabilizing effects of compressibility reported in the literature. It is shown that the growth rate n obtained for an inviscid, compressible flow in an infinite domain is bounded by the growth rates obtained for the corresponding incompressible flows with uniform and exponentially varying density. As the equilibrium pressure at the interface p(infinity) increases (less compressible flow), n increases towards the uniform density result, while as the ratio of specific heats gamma increases (less compressible fluid), n decreases towards the exponentially varying density incompressible flow result. This remains valid in the presence of surface tension or for viscous fluids and the validity of the results is also discussed for finite size domains. The critical wavenumber imposed by the presence of surface tension is unaffected by compressibility. However, the results show that the surface tension modifies the sensitivity of the growth rate to a differential change in gamma for the lower and upper fluids. For the viscous case, the linearized equations are solved numerically for different values of p(infinity) and gamma. It is found that the largest differences compared with the incompressible cases are obtained at small Atwood numbers. The most unstable mode for the compressible case is also bounded by the most unstable modes corresponding to the two limiting incompressible cases. (C) 2004 American Institute of Physics. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Livescu, D (reprint author), Los Alamos Natl Lab, Div Theoret, T3 MS B216, Los Alamos, NM 87545 USA. OI Livescu, Daniel/0000-0003-2367-1547 NR 19 TC 47 Z9 48 U1 1 U2 10 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 2004 VL 16 IS 1 BP 118 EP 127 DI 10.1063/1.1630800 PG 10 WC Mechanics; Physics, Fluids & Plasmas SC Mechanics; Physics GA 752RX UT WOS:000187181900014 ER PT J AU Avakian, H Elouadrhiri, L AF Avakian, H Elouadrhiri, L CA CLAS Collaboration TI Single spin asymmetries at CLAS SO PHYSICS OF PARTICLES AND NUCLEI LA English DT Article; Proceedings Paper CT 10th International Workshop on High-Energy Spin Physics CY SEP 16-20, 2003 CL Dubna, RUSSIA ID DEEP-INELASTIC SCATTERING; FINAL-STATE INTERACTIONS; VIRTUAL COMPTON-SCATTERING; DRELL-YAN PROCESSES; TO-LEADING-ORDER; FRAGMENTATION FUNCTIONS; PARTON DISTRIBUTIONS; SEMIINCLUSIVE ELECTROPRODUCTION; QUARK DISTRIBUTIONS; POLARIZED NUCLEONS AB We present recent results from Jefferson Lab's CLAS detector on beam and target single-spin asymmetries in single pion electroproduction off unpolarized hydrogen and polarized NH3 targets. Systematic studies of the factorization of x and z dependences have been done for different spin-dependent and independent observables. No significant x or z dependence has been observed within statistical uncertainties, which is consistent with factorization holding within the kinematic range and the precision of the present measurement. Nonzero single-beam and single-target spin asymmetries have been observed for the first time in semi-inclusive and exclusive pion production in hard-scattering kinematics. C1 Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA. RP Avakian, H (reprint author), Thomas Jefferson Natl Accelerator Facil, Jefferson Ave, Newport News, VA 23606 USA. NR 48 TC 4 Z9 4 U1 0 U2 0 PU MAIK NAUKA/INTERPERIODICA/SPRINGER PI NEW YORK PA 233 SPRING ST, NEW YORK, NY 10013-1578 USA SN 1063-7796 EI 1531-8559 J9 PHYS PART NUCLEI+ JI Phys. Part. Nuclei PY 2004 VL 35 SU 1 BP S114 EP S120 PG 7 WC Physics, Particles & Fields SC Physics GA 879QH UT WOS:000225731800025 ER PT J AU Schauer, MM Barnes, DC Umstadter, KR AF Schauer, MM Barnes, DC Umstadter, KR TI Physics of non-thermal Penning-trap electron plasma and application to ion trapping SO PHYSICS OF PLASMAS LA English DT Article ID EQUILIBRIUM; CONFINEMENT; FUSION AB A modified Penning-Malmberg trap is used to produce a reflexing beam electron distribution. Positive ions are trapped in the electron space charge within a shaped anode at the center of the beam. Electron reflexing of greater than 10(6) circuits is observed, with a perveance several times that of earlier single pass devices. Classical slowing of the electron beams is observed. Two-stream instability is avoided because the emission limited space charge is subcritical. Trapped ions are observed in two modes of operation; a quiescent mode in which ions are directly counted after destroying the space charge configuration, and a rf mode in which the ion resonance instability is active. Ion inventory up to quasineutral conditions is implied for the quiescent trapping mode. (C) 2004 American Institute of Physics. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Schauer, MM (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 13 TC 2 Z9 2 U1 1 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 2004 VL 11 IS 1 BP 9 EP 15 DI 10.1063/1.1630317 PG 7 WC Physics, Fluids & Plasmas SC Physics GA 755UP UT WOS:000187430100003 ER PT J AU Tang, XZ Boozer, AH AF Tang, XZ Boozer, AH TI Numerical studies of a steady state axisymmetric co-axial helicity injection plasma SO PHYSICS OF PLASMAS LA English DT Article ID EQUILIBRIUM; GENERATION; RELAXATION; TOKAMAK AB Steady state current profile, plasma potential, and plasma flow of an electrostatically driven co-axial helicity injection (CHI) plasma with axisymmetry are numerically investigated using both an open field line Grad-Shafranov equilibrium model and self-consistent initial value magnetohydrodynamic (MHD) simulations. For CHI plasmas, the Grad-Shafranov model ignores plasma inertia but not a perpendicular, or Grad-Shafranov, flow. The Grad-Shafranov flow is the result of the gradient of Grad-Shafranov potential across magnetic field lines, and is responsible for toroidal current drive. Numerical Grad-Shafranov solutions show that as the characteristic CHI discharge parameter, the normalized voltage (ν) over cap equivalent tomu(0nu)/etaB(0)q(0), becomes order of unity, CHI plasma develops kink-unstable hollow current profile. Here nu is the imposed voltage, eta the plasma resistivity, q(0) the toroidal and injector poloidal flux ratio, and B(0)equivalent to4chi(0)/ab a nominal poloidal field defined by the injector poloidal flux chi(0), plasma minor radius a, and plasma elongation b/a. When a small plasma inertia is included in the equation of motion, such as that in a time dependent MHD calculation, the modification on the perpendicular current is small, but its impact on parallel current distribution and hence the spatial dependence of magnetic flux can be great through the Pfirsch-Schluter-like effects. (C) 2004 American Institute of Physics. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA. RP Tang, XZ (reprint author), Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. NR 14 TC 14 Z9 14 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 2004 VL 11 IS 1 BP 171 EP 185 DI 10.1063/1.1630574 PG 15 WC Physics, Fluids & Plasmas SC Physics GA 755UP UT WOS:000187430100020 ER PT J AU Williams, EA Cohen, BI Divol, L Dorr, MR Hittinger, JA Hinkel, DE Langdon, AB Kirkwood, RK Froula, DH Glenzer, SH AF Williams, EA Cohen, BI Divol, L Dorr, MR Hittinger, JA Hinkel, DE Langdon, AB Kirkwood, RK Froula, DH Glenzer, SH TI Effects of ion trapping on crossed-laser-beam stimulated Brillouin scattering SO PHYSICS OF PLASMAS LA English DT Article ID ENERGY-TRANSFER; THOMSON SCATTERING; PLASMA-WAVES; PARAMETRIC-INSTABILITIES; NONLINEAR SATURATION; HYDRA SIMULATIONS; ACOUSTIC-WAVES; FREQUENCY; FACILITY; DRIVEN AB An analysis of the effects of ion trapping on ion acoustic waves excited by the stimulated Brillouin scattering of crossing intense laser beams is presented. Ion trapping alters the dispersion of ion acoustic waves by nonlinearly shifting the normal mode frequency and by reducing the ion Landau damping. This in turn can influence the energy transfer between two crossing laser beams in the presence of plasma flows such that stimulated Brillouin scattering (SBS) occurs. The same ion trapping physics can influence the saturation of SBS in other circumstances. A one-dimensional analytical model is presented along with reasonably successful comparisons of the theory to results from particle simulations and laboratory experiments. An analysis of the vulnerability of the National Ignition Facility Inertial Confinement Fusion point design [S. W. Haan , Fusion Sci. Technol. 41, 164 (2002)] is also presented. (C) 2004 American Institute of Physics. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Williams, EA (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. NR 53 TC 55 Z9 56 U1 0 U2 5 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 2004 VL 11 IS 1 BP 231 EP 244 DI 10.1063/1.1630573 PG 14 WC Physics, Fluids & Plasmas SC Physics GA 755UP UT WOS:000187430100026 ER PT J AU Madison, KW Patel, PK Price, D Edens, A Allen, M Cowan, TE Zweiback, J Ditmire, T AF Madison, KW Patel, PK Price, D Edens, A Allen, M Cowan, TE Zweiback, J Ditmire, T TI Fusion neutron and ion emission from deuterium and deuterated methane cluster plasmas SO PHYSICS OF PLASMAS LA English DT Article ID INDUCED COULOMB EXPLOSION; HIGH-ENERGY IONS; ATOMIC CLUSTERS; NUCLEAR-FUSION; LASER-PULSES; AMMONIA CLUSTERS; IODIDE CLUSTERS; IONIZATION; DRIVEN; GASES AB Experiments on the interaction of intense, ultrafast pulses with large van der Waals bonded clusters have shown that these clusters can explode with substantial kinetic energy and that the explosion of deuterium clusters can drive nuclear fusion reactions. Producing explosions in deuterated methane clusters with a 100 fs, 100 TW laser pulse, it is found that deuterium ions are accelerated to sufficiently high kinetic energy to drive deuterium nuclear fusion. From measurements of cluster size and ion energy via time of flight methods, it is found that these exploding deuterated methane clusters exhibit higher ion energies than explosions of comparably sized neat deuterium clusters, in accord with recent theoretical predictions. From measurements of the plume size and peak density, the relative contribution to the fusion yield from both beam target and intrafilament fusion is discussed. (C) 2004 American Institute of Physics. C1 Univ Texas, Dept Phys, Austin, TX 78712 USA. Lawrence Livermore Natl Lab, Phys & Adv Technol Directorate, Livermore, CA 94550 USA. Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA. Gen Atom Co, San Diego, CA 92186 USA. RP Madison, KW (reprint author), Univ Texas, Dept Phys, Austin, TX 78712 USA. EM madison@physics.utexas.edu RI Patel, Pravesh/E-1400-2011; Cowan, Thomas/A-8713-2011 OI Cowan, Thomas/0000-0002-5845-000X NR 34 TC 107 Z9 109 U1 4 U2 13 PU AMER INST PHYSICS PI MELVILLE PA 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA SN 1070-664X EI 1089-7674 J9 PHYS PLASMAS JI Phys. Plasmas PD JAN PY 2004 VL 11 IS 1 BP 270 EP 277 DI 10.1063/1.1632906 PG 8 WC Physics, Fluids & Plasmas SC Physics GA 755UP UT WOS:000187430100030 ER PT J AU Popov, VV Teperik, TV Polischuk, OV Peralta, XG Allen, SJ Horing, NJM Wanke, MC AF Popov, VV Teperik, TV Polischuk, OV Peralta, XG Allen, SJ Horing, NJM Wanke, MC TI Plasmon-induced terahertz absorption and photoconductivity in a grid-gated double-quantum-well structure SO PHYSICS OF THE SOLID STATE LA English DT Article; Proceedings Paper CT Conference Dedicated to Oleg Vladimirovich Losev (1903-1942) - Pioneer of Semiconductor Electronics CY MAR 17-20, 2003 CL NIZHNII NOVGOROD, RUSSIA ID INFRARED TRANSMISSION SPECTRA; LATERALLY CONFINED 2D-PLASMA; SYSTEMS; WIRES; OSCILLATIONS; FIELD AB The terahertz absorption spectra of plasmon modes in a grid-gated double-quantum-well field-effect transistor structure is analyzed theoretically and numerically using the scattering matrix approach and is shown to faithfully reproduce strong resonant features of recent experimental observations of terahertz photoconductivity in such a structure. (C) 2004 MAIK "Nauka / Interperiodica". C1 Russian Acad Sci, Inst Radio Engn & Elect, Saratov Div, Saratov 410019, Russia. Univ Calif Santa Barbara, Ctr Terahertz Sci & Technol, Santa Barbara, CA 93106 USA. Stevens Inst Technol, Dept Phys & Engn Phys, Hoboken, NJ 07030 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Popov, VV (reprint author), Russian Acad Sci, Inst Radio Engn & Elect, Saratov Div, Saratov 410019, Russia. RI Peralta, Xomalin/F-3710-2014; OI Peralta, Xomalin/0000-0002-4034-3214; Polischuk, Olga/0000-0001-5220-4847; Popov, Viacheslav/0000-0003-1303-6443 NR 12 TC 10 Z9 10 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 2004 VL 46 IS 1 BP 153 EP 156 DI 10.1134/1.1641943 PG 4 WC Physics, Condensed Matter SC Physics GA 762GV UT WOS:000187964400036 ER PT J AU Ovchinnikov, SY Ogurtsov, GN Macek, JH Gordeev, YS AF Ovchinnikov, SY Ogurtsov, GN Macek, JH Gordeev, YS TI Dynamics of ionization in atomic collisions SO PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS LA English DT Review DE atomic collision; ionization; electron spectra ID PROTON-HYDROGEN COLLISIONS; CLOSE-COUPLING CALCULATIONS; DEPENDENT SCHRODINGER-EQUATION; BINARY-ENCOUNTER ELECTRONS; TRIPLE-CENTER TREATMENT; SADDLE-POINT ELECTRONS; H+-H COLLISIONS; IMPACT IONIZATION; CROSS-SECTIONS; ION-IMPACT AB The present state of the theoretical study of ionization in ion-atom and atom-atom collisions is reviewed on the basis of quantum mechanical approaches to the solution of the time-dependent Schrodinger equation. Perturbative theories as well as the methods employing exact numerical solutions of the Schrodinger equation, expansion of wave functions on atomic and molecular bases and Sturmian expansions are considered. Advantages and limitations of these methods are assessed for colliding systems with one "active" electron, e.g. H+-H and He2+-H. Comparison of calculations with available experimental data is given in a broad collision energy range. Perspectives for further developments are discussed. (C) 2003 Elsevier B.V. All rights reserved. C1 Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia. RP Ovchinnikov, SY (reprint author), Univ Tennessee, Dept Phys & Astron, 401 Nielson Bldg, Knoxville, TN 37996 USA. EM serge@charcoal.phys.utk.edu; g.ogurtsov@mail.ioffe.ru; jmacek@utk.edu; gorgeev@mail.ioffe.ru RI Ovchinnikov, Serguei/C-4994-2014; Ogurtsov, Gennadi/E-8813-2014 NR 119 TC 23 Z9 23 U1 1 U2 4 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-1573 J9 PHYS REP JI Phys. Rep.-Rev. Sec. Phys. Lett. PD JAN PY 2004 VL 389 IS 3 BP 119 EP 159 DI 10.1016/j.physrep.2003.09.005 PG 41 WC Physics, Multidisciplinary SC Physics GA 760UU UT WOS:000187854300001 ER PT J AU Chomaz, P Colonna, M Randrup, J AF Chomaz, P Colonna, M Randrup, J TI Nuclear spinodal fragmentation SO PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS LA English DT Review ID HEAVY-ION COLLISIONS; GAS PHASE-TRANSITION; BOLTZMANN-LANGEVIN EQUATION; ONE-BODY DYNAMICS; ANTISYMMETRIZED MOLECULAR-DYNAMICS; DEPENDENT CLUSTER MODEL; SOLID-LIQUID TRANSITION; NEUTRON-STAR DENSITIES; MEAN-FIELD SIMULATIONS; WAVE-PACKET DYNAMICS AB Spinodal multifragmentation in nuclear physics is reviewed. Considering first spinodal instability within the general framework of then-nodynamics, we discuss the intimate relationship between first-order phase-transitions and convexity anomalies in the thermodynamic potentials, clarify the relationship between mechanical and chemical instability in two-component systems, and also address finite systems. Then we analyze the onset of spinodal fragmentation by various linear-response methods. Using the Landau theory of collective modes in bulk matter as a starting point, we first review the application of mean-field methods for the identification of the unstable collective modes and the determination of their structure and the associated dispersion relations yielding their growth rates. Subsequently, the corresponding results for finite nuclei are addressed and, within the random-phase approximation, we establish the connection between unstable modes in dilute systems and giant resonances in hot nuclei. Then we turn to the temporal evolution of the unstable systems, discussing first how the dynamics changes its character from being initially linear towards being chaotic and then considering the growth of initially agitated instabilities within the framework of one-body dynamics. We review especially the body of work relating to the Boltzmann-Langevin model, in which the stochastic part of the residual two-body collisions provides a well-defined noise that may agitate the collective modes. We seek to assess the utility of various approximate treatments, including brownian one-body dynamics, and discuss the many possible refinements of the basic treatment. After these primarily formal or idealized studies, we turn to the applications to nuclear multifragmentation and review the various investigations of whether the bulk of the collision zone becomes spinodally unstable. Fragmentation studies with both many-body and stochastic one-body models are discussed and we address the emerging topic of isospin fractionation. We then make contact with experimental data which indicates that the spinodal region is being entered under suitable conditions and we discuss in particular recent results on multifragment size correlations that appear to present signals of spinodal fragmentation. It is demonstrated how various aspects of the data can be understood both qualitatively and quantitatively within the stochastic one-body framework, thus strongly suggesting that nuclear spinodal fragmentation indeed occurs. We finally outline perspectives for further advances on the topic and make connections to current progress on related issues. (C) 2003 Published by Elsevier B.V. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. Lab Nazl Sud, I-95123 Catania, Italy. CEA, CNRS, IN2P3, GANIL,DSM, F-14076 Caen 5, France. RP Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM randrup@lbl.gov NR 318 TC 235 Z9 241 U1 3 U2 31 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0370-1573 EI 1873-6270 J9 PHYS REP JI Phys. Rep.-Rev. Sec. Phys. Lett. PD JAN PY 2004 VL 389 IS 5-6 BP 263 EP 440 DI 10.1016/j.physrep.2003.09.006 PG 178 WC Physics, Multidisciplinary SC Physics GA 764TX UT WOS:000188223100001 ER PT J AU Ball, J Bertrand, F AF Ball, J Bertrand, F TI Subramanian Raman SO PHYSICS TODAY LA English DT Biographical-Item C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Ball, J (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. NR 0 TC 0 Z9 0 U1 1 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 2004 VL 57 IS 1 BP 70 EP 70 DI 10.1063/1.1650083 PG 1 WC Physics, Multidisciplinary SC Physics GA 759JT UT WOS:000187735100022 ER PT J AU Crease, RP AF Crease, RP TI That's the way things go SO PHYSICS WORLD LA English DT Editorial Material C1 SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. RP Crease, RP (reprint author), SUNY Stony Brook, Dept Philosophy, Stony Brook, NY 11794 USA. EM rcrease@notes.cc.sunysb.edu NR 0 TC 3 Z9 3 U1 0 U2 0 PU IOP PUBLISHING LTD PI BRISTOL PA DIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLAND SN 0953-8585 J9 PHYS WORLD JI Phys. World PD JAN PY 2004 VL 17 IS 1 BP 14 EP 14 PG 1 WC Physics, Multidisciplinary SC Physics GA 765GR UT WOS:000188259200015 ER PT J AU Orrell, KS Congdon, JD Jenssen, TA Michener, RH Kunz, TH AF Orrell, KS Congdon, JD Jenssen, TA Michener, RH Kunz, TH TI Intersexual differences in energy expenditure of Anolis carolinensis lizards during breeding and postbreeding seasons SO PHYSIOLOGICAL AND BIOCHEMICAL ZOOLOGY LA English DT Article ID SCELOPORUS-OCCIDENTALIS; CNEMIDOPHORUS-TIGRIS; METABOLIC RATES; MATING SYSTEMS; SOUTH-CAROLINA; REPRODUCTION; ENERGETICS; TEMPERATURE; SELECTION; REPTILES AB Although the amount of energy that males and females invest in reproduction is an integral component of theories explaining the evolution of particular mating strategies, few studies have actually determined the amount of energy that each sex allocates to reproduction. We compared how energy is expended by male and female Anolis carolinensis lizards during both the breeding and postbreeding seasons. We used laboratory respirometry to determine resting metabolic rates (RMRs) of inactive, freshly captured lizards and the doubly labeled water technique to determine field metabolic rates (FMRs) of free-ranging lizards. Both RMRs and FMRs were influenced by body mass but not by sex. Season did not influence FMRs; however, RMRs of both sexes increased similar to 40% from the breeding to the postbreeding season. The seasonal increase in RMRs was attributed to a postreproductive increase in feeding rate and specific dynamic action. We used RMRs, FMRs, and thermal profiles of lizards to calculate energy budgets for breeding and postbreeding seasons. Energy budgets partitioned daily field energy (DFE; calculated from FMRs) into daily activity energy ( DAE) and daily resting energy (DRE; calculated from RMRs). Energy expended for reproduction was estimated as DAE during the breeding season plus egg production ( for females). Despite males having 40% greater body mass, females expended 46% more energy for reproduction than did males ( 906 and 619 J/d, respectively). Total metabolizable energy (TME = production for females) expended during the breeding season was similar for males and females ( 1,280 and 1,365 J/d, respectively). Although TME of females decreased 44% from the breeding to the postbreeding season ( 1,365 vs. 766 J/ d), TME of males was similar during both seasons ( 1,280 vs. 1,245 J/ d). There were both seasonal and sexual differences in DRE and DAE. Compared with most lizards from semiarid/ desert habitats, A. carolinensis in a temperate habitat expends more total energy during the breeding season, allocates more energy to eggs, and appears to have more total energy available for reproduction. C1 Virginia Tech, Dept Biol, Blacksburg, VA 24061 USA. Savannah River Ecol Lab, Aiken, SC 29802 USA. Boston Univ, Dept Biol, Boston, MA 02215 USA. RP Orrell, KS (reprint author), Virginia Tech, Dept Biol, Blacksburg, VA 24061 USA. EM korrell@vt.edu NR 72 TC 6 Z9 6 U1 4 U2 16 PU UNIV CHICAGO PRESS PI CHICAGO PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA SN 1522-2152 J9 PHYSIOL BIOCHEM ZOOL JI Physiol. Biochem. Zool. PD JAN-FEB PY 2004 VL 77 IS 1 BP 50 EP 64 DI 10.1086/383497 PG 15 WC Physiology; Zoology SC Physiology; Zoology GA 812CT UT WOS:000220818300006 PM 15057717 ER PT S AU Zinn, J Judd, OP ReVelle, DO AF Zinn, J Judd, OP ReVelle, DO BE Rodin, A Rees, D Gupta, SP TI Leonid meteor ablation, energy exchange, and trail morphology (vol 33, pg 1466, 2004) SO PLANETARY IONOSPHERES AND ATMOSPHERES INCLUDING CIRA SE ADVANCES IN SPACE RESEARCH LA English DT Correction CT 2nd World Space Congress/34th COSPAR Scientific Assembly CY OCT 10-19, 2002 CL HOUSTON, TX SP Comm Space Res C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Zinn, J (reprint author), Los Alamos Natl Lab, Nis-1 TA-3 Bldg 1888,Bikini Atoll Rd, Los Alamos, NM 87545 USA. EM jzinn@lanl.gov RI Rodin, Alexander/L-1904-2013 OI Rodin, Alexander/0000-0002-3601-7790 NR 1 TC 4 Z9 4 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI KIDLINGTON PA THE BOULEVARD, LANGFORD LANE,, KIDLINGTON OX5 1GB, OXFORD, ENGLAND SN 0273-1177 J9 ADV SPACE RES PY 2004 VL 34 IS 8 BP 1839 EP 1839 DI 10.1016/j.asr.2004.07.001 PG 1 WC Engineering, Aerospace; Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences SC Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences GA BBH96 UT WOS:000225594400031 ER PT J AU Tuskan, GA DiFazio, SP Teichmann, T AF Tuskan, GA DiFazio, SP Teichmann, T TI Poplar genomics is getting popular: The impact of the poplar genome project on tree research SO PLANT BIOLOGY LA English DT Article DE poplar; whole genome sequence; model tree ID BIOLOGY AB Trees, due to their long life-span, have characteristics that distinguish them from annual, herbaceous plants. It is likely that many of these properties are based on a tree-specific genetic foundation. The U.S. Department of Energy initiated a genome-sequencing project for Populus, a model perennial plant. Through international collaboration and input to the sequencing effort, the annotated whole genome sequence of Populus trichocarpa will be released to the public in early 2004. This genomic resource will, for the first time, allow comparison between a perennial and an annual plant on a whole genome basis and therefore provide clues for molecular research on tree-specific questions like dormancy, development of a secondary cambium, juvenile-mature phase change, or long-term host-pest interactions. The approximately 520 Mbp of annotated genomic sequence will complement and expand the knowledge provided so far by the 125000 ESTs from poplar that are available in public databases. This article introduces the international poplar research programmes and points out the significance of the poplar genome project for plant research. C1 Univ Gottingen, Inst Forstbot, D-37077 Gottingen, Germany. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. RP Teichmann, T (reprint author), Univ Gottingen, Inst Forstbot, Busgenweg 2, D-37077 Gottingen, Germany. EM tteichm@gwdg.de RI Tuskan, Gerald/A-6225-2011 OI Tuskan, Gerald/0000-0003-0106-1289 NR 4 TC 68 Z9 81 U1 3 U2 13 PU GEORG THIEME VERLAG KG PI STUTTGART PA RUDIGERSTR 14, D-70469 STUTTGART, GERMANY SN 1435-8603 J9 PLANT BIOLOGY JI Plant Biol. PD JAN-FEB PY 2004 VL 6 IS 1 BP 2 EP 4 DI 10.1055/s-2003-44715 PG 3 WC Plant Sciences SC Plant Sciences GA 800XU UT WOS:000220061800002 PM 15095128 ER PT J AU Nemov, VV Kalyuzhnyj, VN Kasilov, SV Drevlak, M Nuhrenberg, J Kernbichler, W Reiman, A Monticello, D AF Nemov, VV Kalyuzhnyj, VN Kasilov, SV Drevlak, M Nuhrenberg, J Kernbichler, W Reiman, A Monticello, D TI Study of neoclassical transport and bootstrap current for W7-X in the 1/nu regime, using results from the PIES code SO PLASMA PHYSICS AND CONTROLLED FUSION LA English DT Article ID LARGE HELICAL DEVICE; STELLARATORS; CONFIGURATIONS; EQUILIBRIUM AB For the magnetic field of the Wendelstein 7-X (W7-X) standard high-mirror configuration, computed by the PIES code, taking into account real coil geometry, neoclassical transport and bootstrap current are analysed in the 1/v regime using methods based on the integration along magnetic field lines in a given magnetic field. The zero beta and = 1% cases are studied. The results are compared to the corresponding results for the vacuum magnetic field directly produced by modular coils. A significant advantage of W7-X over a conventional stellarator resulting from reduced neoclassical transport and from reduced bootstrap current follows from the computations although the neoclassical transport is somewhat larger than that previously obtained for the ideal W7-X model configuration. C1 Kharkov Phys & Technol Inst, Ctr Nat Sci, Inst Plasma Phys, UA-61108 Kharkov, Ukraine. Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. Graz Univ Technol, Inst Theoret Phys, A-8010 Graz, Austria. Max Planck Inst Plasma Phys, Teilinst Greifswald, IPP, EURATOM Assoc, D-17491 Greifswald, Germany. RP Nemov, VV (reprint author), Kharkov Phys & Technol Inst, Ctr Nat Sci, Inst Plasma Phys, Akad Skaya Str 1, UA-61108 Kharkov, Ukraine. NR 21 TC 4 Z9 4 U1 0 U2 1 PU IOP PUBLISHING LTD PI BRISTOL PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND SN 0741-3335 EI 1361-6587 J9 PLASMA PHYS CONTR F JI Plasma Phys. Control. Fusion PD JAN PY 2004 VL 46 IS 1 BP 179 EP 191 AR PII S0741-3335(04)65723-X DI 10.1088/0741-3335/46/1/011 PG 13 WC Physics, Fluids & Plasmas SC Physics GA 772YC UT WOS:000188869600012 ER PT S AU Ryutova, M Shine, R AF Ryutova, M Shine, R BE Bertin, G Farina, D Pozzoli, R TI Magnetic coupling between the solar surface and corona: Theory and observations SO PLASMAS IN THE LABORATORY AND IN THE UNIVERSE: NEW INSIGHTS AND NEW CHALLENGES SE AIP Conference Proceedings LA English DT Proceedings Paper CT Conference on Plasmas in the Laboratory and in the Universe CY SEP 16-19, 2003 CL Como, ITALY SP Univ Studi Milano, Dipartimento Fis ID TRANSITION REGION; EXPLOSIVE EVENTS; SUN; NETWORK AB Multi-wavelength observations taken simultaneously by several instruments on the Solar and Heliospheric Observatory (SOHO) and Transition Region and Coronal Explorer (TRACE) revealed a clear connection between the photospheric magnetic fields and the energetic events in the overlying atmosphere. We find that the EUV coronal emission above the photosphere dominated by single polarity magnetic element,, is spongy in space and has coherent braid-like structures in time. Contrary to these long living structures, corona above the regions with mixed polarity magnetic elements is highly discrete and consists of sporadic microflares, supersonic jets and their combinations. We believe that in the unipolar magnetic regions the energy flow from the surface to corona is associated with the nonlinear collective phenomena in the ensemble of oscillating magnetic flux tubes. These phenomena lead to formation of hot coronal "clouds" that have the properties of energetically open turbulence with tendency to self organization. Jets and microflares above the mixed polarity regions are associated with shock waves, produced by reconnecting magnetic flux tubes in the photosphere and subsequent interaction of shocks which leads to hydrodynamic cumulation of energy, which leads to impulsive phenomena similar to shaped charges. C1 Lawrence Livermore Natl Lab, IGPP, Livermore, CA 94550 USA. RP Ryutova, M (reprint author), Lawrence Livermore Natl Lab, IGPP, L-413, Livermore, CA 94550 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 0-7354-0176-4 J9 AIP CONF PROC PY 2004 VL 703 BP 203 EP 208 PG 6 WC Astronomy & Astrophysics; Physics, Fluids & Plasmas SC Astronomy & Astrophysics; Physics GA BY87Q UT WOS:000189484400030 ER PT S AU Ryutov, DD Kane, JO Mizuta, A Pound, MW Remington, BA AF Ryutov, DD Kane, JO Mizuta, A Pound, MW Remington, BA BE Bertin, G Farina, D Pozzoli, R TI Eagle Nebula: The problem of missing stiffness and the hypothesis of magnetostatic turbulence SO PLASMAS IN THE LABORATORY AND IN THE UNIVERSE: NEW INSIGHTS AND NEW CHALLENGES SE AIP CONFERENCE PROCEEDINGS LA English DT Proceedings Paper CT Conference on Plasmas in the Laboratory and in the Universe CY SEP 16-19, 2003 CL Como, ITALY SP Univ Studi Milano, Dipartimento Fis ID DENSE MOLECULAR CLOUDS; IONIZATION FRONTS; INTERSTELLAR CLOUDS; MAGNETIC-FIELDS; INSTABILITY; PHOTOEVAPORATION; STABILITY; PLASMA; GAS; M16 AB A brief summary of recent observational data related to the Eagle Nebula is presented and applicability of single-fluid magnetohydrodynamics for describing its evolution is discussed. A model attributing the "stiffness" of the cold gas in molecular clouds to the presence of the magnetostatic turbulence is described. It is argued that this model may explain the observed dynamics of the Eagle Nebula. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Ryutov, DD (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. NR 40 TC 4 Z9 5 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 0-7354-0176-4 J9 AIP CONF PROC PY 2004 VL 703 BP 415 EP 424 PG 10 WC Astronomy & Astrophysics; Physics, Fluids & Plasmas SC Astronomy & Astrophysics; Physics GA BY87Q UT WOS:000189484400064 ER PT S AU Ji, H Yamada, A Terry, S Kulsrud, R Ren, Y Kuritsyn, A AF Ji, H Yamada, A Terry, S Kulsrud, R Ren, Y Kuritsyn, A BE Bertin, G Farina, D Pozzoli, R TI Measurements of magnetic fluctuations in magnetic reconnection experiment SO PLASMAS IN THE LABORATORY AND IN THE UNIVERSE: NEW INSIGHTS AND NEW CHALLENGES SE AIP Conference Proceedings LA English DT Proceedings Paper CT Conference on Plasmas in the Laboratory and in the Universe CY SEP 16-19, 2003 CL Como, ITALY SP Univ Studi Milano, Dipartimento Fis ID HYBRID-DRIFT INSTABILITY; CURRENT-SHEET; STREAMING INSTABILITY; SWEET-PARKER; PLASMA; RESISTIVITY; TURBULENCE; EVOLUTION; DRIVEN; BETA AB Magnetic reconnection plays an important role in determining the evolution of magnetic topology in laboratory and astrophysical plasmas. A central question concerns why the observed reconnection rates are much faster than predictions made by classical theories, such as the Sweet-Parker model based on MHD with classical Spitzer resistivity. Often, the local resistivity is conjectured to be enhanced by micro-instabilities to accelerate reconnection rates either in the context of the Sweet-Parker model or by facilitating setup of the Pestchek model. Although it is commonly believed that there is plenty of free energy available at the reconnection region to destabilize some sort of micro-instability, a clear identification of this instability and its exact role in reconnection has never been established experimentally. We report the first such experimental evidence of a clear and positive correlation between magnetic fluctuations in the lower-hybrid frequency range and resistivity enhancement during fast reconnection in the low-collisionality regimes in the Magnetic Reconnection Experiment (MRX), The waves have been identified as right-hand polarized whistler waves, propagating obliquely to the reconnecting field, with a phase velocity comparable to the relative drift velocity. These waves are consistent with the modified two-stream instability driven by large drift speeds compared to the Alfven speed in high-beta plasmas, The short coherence length and large variation along the propagation direction indicate their strongly nonlinear nature. C1 Princeton Plasma Phys Lab, Princeton, NJ 08543 USA. RP Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA. NR 32 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 0-7354-0176-4 J9 AIP CONF PROC PY 2004 VL 703 BP 437 EP 442 PG 6 WC Astronomy & Astrophysics; Physics, Fluids & Plasmas SC Astronomy & Astrophysics; Physics GA BY87Q UT WOS:000189484400067 ER PT S AU Yan, F Wabuyele, MB Griffin, GD Vo-Dinh, T AF Yan, F Wabuyele, MB Griffin, GD Vo-Dinh, T BE VoDinh, T Gryczynski, Z Lakowicz, JR TI Metallic nanostructures for plasmonic sensors using surface-enhanced fluorescence and Raman detection SO PLASMONICS IN BIOLOGY AND MEDICINE SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Plasmonics in Biology and Medicine CY JAN 26-27, 2004 CL San Jose, CA SP SPIE DE metallic nanostructures; silicon oxide coating; surface-enhanced Raman scattering; surface-enhanced fluorescence; fluorescein; rhodamine 123; plasmonic sensors ID SILVER; FLUOROPHORES; FILMS; DYE AB We present the fabrication and characterization of silver island films with SiO2 coatings for application in plasmonic sensors based on surface-enhanced fluorescence and Raman detection. The emission spectral properties of goat anti-mouse immumoglobulin (IgG) F(ab')(2) labeled with one or two fluorescein residues were examined on substrates with metallic silver islands. The self-quenching of fluorescein emission was mostly eliminated when this antibody fragment was held 60-90 Angstrom from the surface of metallic silver islands, and our preliminary experiments demonstrated an 8-fold emission intensity increase. Similar surfaces were also examined for surface-enhanced Raman analysis of Rhodamine 123, a potential drug for photodynamic therapy. C1 Oak Ridge Natl Lab, Adv Biomed Sci & Technol Grp, Oak Ridge, TN 37831 USA. RP Vo-Dinh, T (reprint author), Oak Ridge Natl Lab, Adv Biomed Sci & Technol Grp, POB 2008, Oak Ridge, TN 37831 USA. RI Yan, Fei/P-1330-2014 OI Yan, Fei/0000-0001-5983-143X NR 12 TC 1 Z9 1 U1 0 U2 3 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5235-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5327 BP 53 EP 59 DI 10.1117/12.542455 PG 7 WC Biochemical Research Methods; Optics; Physics, Applied SC Biochemistry & Molecular Biology; Optics; Physics GA BAP10 UT WOS:000223099700007 ER PT S AU Laurence, T Talley, C Colvin, M Huser, T AF Laurence, T Talley, C Colvin, M Huser, T BE Halas, NJ Huser, TR TI Application of SERS nanoparticles for intracellular pH measurements SO PLASMONICS: METALLIC NANOSTRUCTURES AND THEIR OPTICAL PROPERTIES II 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 II CY AUG 02-03, 2004 CL Denver, CO SP SPIE ID SURFACE-ENHANCED RAMAN AB We present an alternative approach to optical probes that will ultimately allow us to measure chemical concentrations in microenvironments within cells and tissues. This approach is based on monitoring the surface-enhanced Raman scattering (SERS) response of functionalized. metal nanoparticles (50-100 nm in diameter). SERS allows for the sensitive detection of changes in the state of chemical groups attached to individual nanoparticles and small clusters. Here, we present the development of a nanoscale pH meter. The pH response of these nanoprobes is tested in a cell-free medium, measuring the pH of the solution immediately surrounding the nanoparticles. Heterogeneities in the SERS signal. which can result from the formation of small nanoparticle clusters, are characterized using SERS correlation spectroscopy and single particle/cluster SERS spectroscopy. The response of the nanoscale pH meters is tested under a wide range of conditions to approach the complex environment encountered inside living cells and to optimize probe performance. C1 Lawrence Livermore Natl Lab, Phys Biosci Inst, Biol & Biotechnol Res Program, Livermore, CA 94550 USA. RP Laurence, T (reprint author), Lawrence Livermore Natl Lab, Phys Biosci Inst, Biol & Biotechnol Res Program, Livermore, CA 94550 USA. NR 7 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 0-8194-5450-8 J9 P SOC PHOTO-OPT INS PY 2004 VL 5512 BP 80 EP 86 DI 10.1117/12.559562 PG 7 WC Optics SC Optics GA BBG44 UT WOS:000225433900009 ER PT J AU Hay, BP Uddin, J Firman, TK AF Hay, BP Uddin, J Firman, TK TI Eight-coordinate stereochemistries of U(IV) catecholate and aquo complexes SO POLYHEDRON LA English DT Article DE eight-coordinate; stereochemistry; dodecahedron; square antiprism; bicapped trigonal prism; molecular mechanics ID CROWN-ETHER COMPLEXES; MM3(96) FORCE-FIELD; MOLECULAR-MECHANICS; CRYSTAL-STRUCTURE; STRUCTURAL CRITERIA; SEQUESTERING AGENTS; SELECTIVE LIGANDS; RATIONAL DESIGN; COORDINATION; TETRAKIS(CATECHOLATO)URANATE(IV) AB An extended MM3 model has been used to identify all low energy configurations for U(IV) complexes with catecholate and aquo ligands. Both stochastic and systematic conformational analyses of [U(cat)(n)(OH2)(8-2n)](4-2n) complexes, n = 1-4, establish that 20 of the 67 possible stereochemistries are minima on the MM3 potential surface. The stable stereochemistries are reported for each stoichiometry and, where possible, the results are compared with experimental data and with the predictions from prior repulsion energy calculations. (C) 2003 Published by Elsevier Ltd. C1 Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA. RP Hay, BP (reprint author), Pacific NW Natl Lab, Div Chem Sci, MS K1-83,POB 999, Richland, WA 99352 USA. EM ben.hay@pnl.gov NR 41 TC 7 Z9 7 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 2004 VL 23 IS 1 BP 145 EP 154 DI 10.1016/j.poly.2003.09.026 PG 10 WC Chemistry, Inorganic & Nuclear; Crystallography SC Chemistry; Crystallography GA 766ZG UT WOS:000188413200020 ER PT J AU Patel, M Soames, M Skinner, AR Stephens, TS AF Patel, M Soames, M Skinner, AR Stephens, TS TI Stress relaxation and thermogravimetric studies on room temperature vulcanised polysiloxane rubbers SO POLYMER DEGRADATION AND STABILITY LA English DT Article DE polysiloxane rubber; stress relaxation; weight loss AB The stress relaxation properties of foamed polysiloxane rubbers are important as they can influence the useful life of components made from such a polymer system. Of particular interest is understanding the changes in properties with time and temperature and whether the mechanisms responsible for stress relaxation are able to induce other material property changes. The stress relaxation properties of Dow Corning S5370 polysiloxane samples, aged under controlled conditions, have been measured using a Thermomechanical analyser (TMA) at a number of different temperatures. The results were assessed using the principle of Time-Temperature Superposition. Derived acceleration factors showed good adherence to the Arrhenius relationship and showed two regions where processes with different activation energies dominate. A transition region where there is a change in the predominant degradation process is evident at around 120 degreesC. Thermogravimetric analysis (TGA) studies were used to provide an improved understanding of the degradation at elevated temperatures (> 120 degreesC). Time-temperature superposition and Arrhenius treatment of the TGA results reveal an activation energy (75 +/- 6 kJ/mol) which correlates closely to that derived from stress relaxation (65 +/- 15 kJ/mol). Overall, these observations suggest that the degradation processes at elevated temperatures which influence stress relaxation also induce significant weight loss. The dominant degradation process at elevated temperatures(> 120 degreesC) is most probably silicone head to tail unzipping reactions resulting in the production of volatile cyclic species. (C) 2003 Elsevier Ltd. All rights reserved. C1 Atom Weapons Estab, Reading RG7 4PR, Berks, England. Los Alamos Natl Lab, Los Alamos, NM USA. RP Patel, M (reprint author), Atom Weapons Estab, Reading RG7 4PR, Berks, England. EM mogon.patel@awe.co.uk RI Stephens, Thomas/D-9512-2012 NR 10 TC 23 Z9 26 U1 4 U2 20 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0141-3910 J9 POLYM DEGRAD STABIL JI Polym. Degrad. Stabil. PD JAN PY 2004 VL 83 IS 1 BP 111 EP 116 DI 10.1016/S0141-3910(03)00231-3 PG 6 WC Polymer Science SC Polymer Science GA 760VE UT WOS:000187855300014 ER PT S AU Jang, SY Marquez, M Sotzing, GA AF Jang, SY Marquez, M Sotzing, GA BE Lin, Q Pearson, RA Hedrick, JC TI Oxidative solid-state cross-linking of polymer precursors to pattern intrinsically conducting polymers SO POLYMERS FOR MICROELECTRONICS AND NANOELECTRONICS SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on Polymers for Micro- and Nano-Electronics CY AUG 18-22, 2002 CL Boston, MA SP Amer Chem Soc, Div Polymer Mat, Sci & Engn ID DIP-PEN NANOLITHOGRAPHY; SOFT LITHOGRAPHY; ELECTROCHROMIC PROPERTIES; CONJUGATED POLYMERS; DEVICES; DERIVATIVES; LENGTH AB Herein we describe the patterning of an intrinsically conducting polymer (ICP) utilizing electrochemical oxidative solid-state crosslinking, what we have termed electrochemically induced pattern transfer (ECIPT) of a precursor polymer. The precursor polymer was a polynorbornylene prepared via ring opening metathesis polymerization (ROMP) of a norbornylene consisting of two terthiophene groups. An ICP network of poly(terthiophene) was prepared from this precursor polymer utilizing solid-state oxidative crosslinking of the pendent terthiophene moieties via both electrochemical and chemical means. Both chemical and electrochemical solid-state crosslinking were confirmed using cyclic voltammetry and UV-Vis-NIR. Pattern generation via ECIPT was demonstrated using a glass substrate consisting of two sets of 10 pm width interdigitated gold leads (50 leads per set) having 10 mum gaps. A film of 0.5 microns thickness of the precursor polynorbornylene was spun coat onto the substrate and application of 0.9 V for 0.1 seconds to one set of the gold leads afforded 50 lines of the poly(terthiophene) ICP network of 16 micron width within the precursor polynorbornylene film. From this, the oxidative propagation speed of the poly(terthiophene) ICP network from the gold line was calculated to be 30 microns/second. C1 Univ Connecticut, Inst Mat Sci, Dept Chem, Storrs, CT 06269 USA. Univ Connecticut, Inst Mat Sci, Polymer Program, Storrs, CT 06269 USA. Los Alamos Natl Lab, Chem Sci & Technol Div, Los Alamos, NM 87545 USA. RP Jang, SY (reprint author), Univ Connecticut, Inst Mat Sci, Dept Chem, Storrs, CT 06269 USA. NR 35 TC 2 Z9 2 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 0-8412-3857-X J9 ACS SYM SER PY 2004 VL 874 BP 44 EP 53 PG 10 WC Chemistry, Multidisciplinary; Engineering, Electrical & Electronic; Polymer Science SC Chemistry; Engineering; Polymer Science GA BAB65 UT WOS:000221484500004 ER PT S AU Lenhart, JL Fischer, DA Sambasivan, S Lin, EK Soles, CL Jones, RL Wu, WL Goldfarb, DL Angelopoulos, M AF Lenhart, JL Fischer, DA Sambasivan, S Lin, EK Soles, CL Jones, RL Wu, WL Goldfarb, DL Angelopoulos, M BE Lin, Q Pearson, RA Hedrick, JC TI Utilizing near edge X-ray absorption fine structure to probe interfacial issues in photolithography SO POLYMERS FOR MICROELECTRONICS AND NANOELECTRONICS SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on Polymers for Micro- and Nano-Electronics CY AUG 18-22, 2002 CL Boston, MA SP Amer Chem Soc, Div Polymer Mat, Sci & Engn ID CHEMICALLY AMPLIFIED PHOTORESISTS; AIRBORNE CONTAMINATION; REACTION FRONT; RESIST AB Control of the shape, critical dimension (CD), and roughness is critical for the fabrication of sub 100 nm features, where the CD and roughness budget are approaching the molecular dimension of the resist polymers. Here we utilize near edge Xray absorption fine structure (NEXAFS) to provide detailed chemical insight into two interfacial problems facing sub 100 run patterning. First, chemically amplified photo-resists are sensitive to surface phenomenon, which causes deviations in the pattern profile near the interface. Striking examples include T-topping, closure, footing, and undercutting. NEXAFS was used to illustrate that the surface extent of deprotection in a model resist film can be different than the bulk deprotection. Second, line edge roughness becomes increasingly critical with shrinking patterns, and may be intimately related to the line edge deprotection profile. A NEXAFS technique to surface depth profile for compositional gradients is described with the potential to provide chemical information about the resist line edge. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. NIST, Gaithersburg, MD 20899 USA. IBM Corp, Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA. RP Lenhart, JL (reprint author), Sandia Natl Labs, POB 5800,MS 1411, Albuquerque, NM 87185 USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 0-8412-3857-X J9 ACS SYM SER PY 2004 VL 874 BP 98 EP 117 PG 20 WC Chemistry, Multidisciplinary; Engineering, Electrical & Electronic; Polymer Science SC Chemistry; Engineering; Polymer Science GA BAB65 UT WOS:000221484500008 ER PT J AU Sugama, T Gawlik, K AF Sugama, T Gawlik, K TI Nanoscale boehmite filler for corrosion- and wear-resistant polyphenylenesulfide coatings SO POLYMERS & POLYMER COMPOSITES LA English DT Article ID POLY(PHENYLENE SULFIDE); POLYSULFONE AB We evaluated the usefulness of nanoscale boehmite crystals as a filler for anti-wear and anti-corrosion polyphenylenesulfide (PPS) coatings exposed to a very harsh, 300degreesC corrosive geothermal environment. The boehmite fillers dispersed uniformly into the PPS coating, conferring two advanced properties: First, they reduced markedly the rate of blasting wear; second, they increased the PPS's glass transition temperature and thermal decomposition temperature. The wear rate of PPS surfaces was reduced threefold when 5 wt% boehmite was incorporated into the PPS. During exposure for 15 days at 300degreesC, the PPS underwent hydrothermal oxidation, leading to the substitution of sulfide linkages by sulfite linkages. However, such molecular alteration did not significantly diminish the ability of the coating to protect carbon steel against corrosion. In fact, PPS coating filled with boehmite of less than or equal to5 wt% adequately mitigated its corrosion in brine at 300degreesC. One concern in using this filler was that it absorbs brine. Thus, adding an excess amount of boehmite was detrimental to achieving maximum protection. C1 Brookhaven Natl Lab, Energy Sci & Technol Dept, Energy Resources Div, Upton, NY 11973 USA. Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Sugama, T (reprint author), Brookhaven Natl Lab, Energy Sci & Technol Dept, Energy Resources Div, Upton, NY 11973 USA. NR 17 TC 5 Z9 5 U1 0 U2 2 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 2004 VL 12 IS 3 BP 153 EP 167 PG 15 WC Materials Science, Characterization & Testing; Materials Science, Composites; Polymer Science SC Materials Science; Polymer Science GA 811JU UT WOS:000220769000001 ER PT S AU Eldrup, M Singh, BN Edwards, DJ Nagai, Y Ohkubo, H Hasegawa, M AF Eldrup, M Singh, BN Edwards, DJ Nagai, Y Ohkubo, H Hasegawa, M BE Hyodo, T Kobayashi, Y Nagashima, Y Saito, H TI Neutron irradiated copper: Is the main positron lifetime component due to stacking fault tetrahedra? SO POSITRON ANNIHILATION, ICPA-13, PROCEEDINGS SE Materials Science Forum LA English DT Article; Proceedings Paper CT 13th International Conference on Positron Annihilation (ICPA-13) CY SEP 07-12, 2003 CL Kyoto, JAPAN SP Commemorat Assoc Japan World Exposit (1970), Res Fdn Mat Sci, Sci Council Japan, Phys Soc Japan, Japan Soc Appl Phys, Chem Soc Japan, Japanese Soc Radiat Chem, Japan Radioisotope Assoc DE copper; defects; neutron irradiation; Positron Annihilation Spectroscopy; positron trapping rates; Stacking Fault Tetrahedra; Transmission Electron Microscopy ID ANNIHILATION; METALS; SPECTROSCOPY; DISLOCATIONS; NUCLEATION; DEFECTS; GOLD; FCC; FE AB Copper has been neutron irradiated at temperatures in the range from 50degreesC to 250degreesC and subsequently stepwise annealed to about 600degreesC. The annealing behaviour was followed by Positron Annihilation Spectroscopy (PAS) and Transmission Electron Microscopy (TEM). In all cases an intense component with a positron lifetime of similar to 180 ps due to defects was observed by PAS as well as a high density of Stacking Fault Tetrahedra (SFTs) by TEM. The measured lifetime is longer than expected for perfect SFTs. Although the decrease in the positron trapping rate follows closely the decrease in SFT density, it is still not completely certain as to whether PAS detects mainly the SFTs and not some other vacancy-like defects. C1 Riso Natl Lab, Mat Res Dept, DK-4000 Roskilde, Denmark. Pacific NW Natl Lab, Richland, WA 99352 USA. Tohoku Univ, Inst Mat Res, Oarai, Ibaraki 3111313, Japan. RP Eldrup, M (reprint author), Riso Natl Lab, Mat Res Dept, DK-4000 Roskilde, Denmark. EM morten.eldrup@risoe.dk RI Nagai, Yasuyoshi/A-8995-2011 NR 23 TC 6 Z9 6 U1 0 U2 1 PU TRANS TECH PUBLICATIONS LTD PI STAFA-ZURICH PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND SN 0255-5476 BN 0-87849-936-9 J9 MATER SCI FORUM PY 2004 VL 445-6 BP 21 EP 25 PG 5 WC Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA BY55H UT WOS:000189406800003 ER PT S AU Glade, SC Wirth, BD Asoka-Kumar, P Sterne, PA Odette, GR AF Glade, SC Wirth, BD Asoka-Kumar, P Sterne, PA Odette, GR BE Hyodo, T Kobayashi, Y Nagashima, Y Saito, H TI Positron annihilation spectroscopy of nanostructural features in model reactor pressure vessel steels SO POSITRON ANNIHILATION, ICPA-13, PROCEEDINGS SE Materials Science Forum LA English DT Article; Proceedings Paper CT 13th International Conference on Positron Annihilation (ICPA-13) CY SEP 07-12, 2003 CL Kyoto, JAPAN SP Commemorat Assoc Japan World Exposit (1970), Res Fdn Mat Sci, Sci Council Japan, Phys Soc Japan, Japan Soc Appl Phys, Chem Soc Japan, Japanese Soc Radiat Chem, Japan Radioisotope Assoc DE nuclear reactor pressure vessel steels; positron annihilation spectroscopy; radiation embrittlement AB Irradiation embrittlement in nuclear reactor pressure vessel steels results from the formation of a high number density of nanometer sized copper rich precipitates and sub-nanometer defect-solute clusters. We present positron annihilation spectroscopy (PAS) results to characterize the compositions and magnetic character of these defects in model A533B reactor pressure vessel steels. The results confirm the presence of copper-rich precipitates after irradiation. The measured orbital electron momentum spectra indicate the precipitates are alloyed with Mn and Ni. The copper precipitates larger than R similar to 1.2 nm (from SANS measurements) are non-magnetic, which limits the possible Fe content of the precipitates to at most a few %. Notably, large vacancy clusters observed in neutron irradiated Fe-Cu alloys were not observed in the steels after irradiation. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. Univ Calif Berkeley, Dept Nucl Engn, Berkeley, CA 94720 USA. Univ Calif Santa Barbara, Dept Mech & Environm Engn, Santa Barbara, CA 93106 USA. RP Glade, SC (reprint author), Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. EM glade1@llnl.gov RI Wirth, Brian/O-4878-2015 OI Wirth, Brian/0000-0002-0395-0285 NR 7 TC 4 Z9 4 U1 1 U2 3 PU TRANS TECH PUBLICATIONS LTD PI STAFA-ZURICH PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND SN 0255-5476 BN 0-87849-936-9 J9 MATER SCI FORUM PY 2004 VL 445-6 BP 87 EP 89 PG 3 WC Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA BY55H UT WOS:000189406800023 ER PT S AU Suzuki, R Ohdaira, T Kobayashi, Y Ito, K Yu, RS Shioya, Y Ichikawa, H Hosomi, H Ishikiriyama, K Shirataki, H Matsuno, S Xu, J AF Suzuki, R Ohdaira, T Kobayashi, Y Ito, K Yu, RS Shioya, Y Ichikawa, H Hosomi, H Ishikiriyama, K Shirataki, H Matsuno, S Xu, J BE Hyodo, T Kobayashi, Y Nagashima, Y Saito, H TI Positron and positronium annihilation in low-dielectric-constant films studied by a pulsed positron beam SO POSITRON ANNIHILATION, ICPA-13, PROCEEDINGS SE Materials Science Forum LA English DT Article; Proceedings Paper CT 13th International Conference on Positron Annihilation (ICPA-13) CY SEP 07-12, 2003 CL Kyoto, JAPAN SP Commemorat Assoc Japan World Exposit (1970), Res Fdn Mat Sci, Sci Council Japan, Phys Soc Japan, Japan Soc Appl Phys, Chem Soc Japan, Japanese Soc Radiat Chem, Japan Radioisotope Assoc DE AMOC; diffusion of ortho-positronium; low dielectric constant; low-k; PALS; plasma-enhanced chemical vapor deposition; porous material; positron annihilation lifetime spectroscopy; spin-on dielectric; three-gamma annihilation ID THIN-FILMS; LIFETIME; SILICON AB Positron and positronium annihilation in porous low-dielectric-constant (low-k) films deposited by plasma-enhanced chemical vapor deposition (PECVD) and spin-on dielectric (SOD) have been investigated by means of positron annihilation lifetime spectroscopy (PALS) and age-momentum correlation (AMOC) spectroscopy with a pulsed slow positron beam. The ortho-positronium (o-Ps) lifetime strongly depends on the deposition condition. In general, PECVD low-k films have shorter o-Ps lifetimes than SOD low-k films, indicating PECVD low-k films have smaller pores. Since o-Ps diffusion and escaping from the surface occurs in most of porous SOD films, three-gamma annihilation measurement is important. To investigate o-Ps behavior in SOD films, we have carried out two-dimensional (2D) PALS measurement, which measures annihilation time and pulse-height of the scintillation detector simultaneously. Monte-Carlo simulation of the o-Ps diffusion and escaping in porous films has been carried out to simulate the 2D-PALS results. C1 Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan. Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058565, Japan. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. Asahikasei Co Ltd, Fuji, Shizuoka 4168501, Japan. Toray Res Ctr Ltd, Otsu, Shiga 5208567, Japan. Semicond Proc Lab Co Ltd, Ichikawa, Chiba 2720001, Japan. RP Suzuki, R (reprint author), Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058568, Japan. EM r-suzuki@aist.go.jp OI Yu, Runsheng/0000-0001-6417-3910 NR 16 TC 7 Z9 7 U1 0 U2 3 PU TRANS TECH PUBLICATIONS LTD PI STAFA-ZURICH PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND SN 0255-5476 BN 0-87849-936-9 J9 MATER SCI FORUM PY 2004 VL 445-6 BP 224 EP 228 PG 5 WC Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA BY55H UT WOS:000189406800068 ER PT S AU Osiele, OM Britton, DT Harting, M Sperr, P Topic, M Shaheen, SE Branz, HM AF Osiele, OM Britton, DT Harting, M Sperr, P Topic, M Shaheen, SE Branz, HM BE Hyodo, T Kobayashi, Y Nagashima, Y Saito, H TI Positron annihilation characteristics of polymer films for photovoltaic applications SO POSITRON ANNIHILATION, ICPA-13, PROCEEDINGS SE Materials Science Forum LA English DT Article; Proceedings Paper CT 13th International Conference on Positron Annihilation (ICPA-13) CY SEP 07-12, 2003 CL Kyoto, JAPAN SP Commemorat Assoc Japan World Exposit (1970), Res Fdn Mat Sci, Sci Council Japan, Phys Soc Japan, Japan Soc Appl Phys, Chem Soc Japan, Japanese Soc Radiat Chem, Japan Radioisotope Assoc DE conjugate polymers; fullerenes; organic semiconductors; P3HT; PCBM AB In this paper we study the effect of combining the conducting polymers, P3HT and OC(1)C(10)-PPV with the fullerene complex PCBM, on its positron annihilation characteristics. The films were deposited on glass substrates by spin casting, and were also characterised with scanning electron microscopy with regard to thickness, and structural homogeneity. Both pure polymers have positron annihilation characteristics similar to most non-polar polymers, exhibiting a relatively broad electron momentum distribution, a long-lived (>1 ns) positron state corresponding to the formation of ortho-positronium, and strong-localisation of the positron. Mixing with PCBM causes the sampled electron momentum distribution to narrow, and results in a single annihilation state with a lifetime of around 370 ps in both polymer mixtures. We postulate that this state corresponds to annihilation with the low-momentum electrons in the fullerene cage. C1 Univ Cape Town, Dept Phys, ZA-7701 Rondebosch, South Africa. Univ Bundeswehr Munchen, Inst Nukl Festkorperphys, DE-85577 Neubiberg, Germany. Natl Renewable Energy Lab, Natl Cent Photovoltaics, Golden, CO 80401 USA. RP Osiele, OM (reprint author), Univ Cape Town, Dept Phys, ZA-7701 Rondebosch, South Africa. RI Shaheen, Sean/M-7893-2013 NR 10 TC 0 Z9 0 U1 0 U2 3 PU TRANS TECH PUBLICATIONS LTD PI STAFA-ZURICH PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND SN 0255-5476 BN 0-87849-936-9 J9 MATER SCI FORUM PY 2004 VL 445-6 BP 337 EP 339 PG 3 WC Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA BY55H UT WOS:000189406800101 ER PT S AU Bug, ALR Muluneh, M Waldman, J Sterne, PA AF Bug, ALR Muluneh, M Waldman, J Sterne, PA BE Hyodo, T Kobayashi, Y Nagashima, Y Saito, H TI Positronium in solids: Computer simulation of pick-off and self-annihilation SO POSITRON ANNIHILATION, ICPA-13, PROCEEDINGS SE Materials Science Forum LA English DT Article; Proceedings Paper CT 13th International Conference on Positron Annihilation (ICPA-13) CY SEP 07-12, 2003 CL Kyoto, JAPAN SP Commemorat Assoc Japan World Exposit (1970), Res Fdn Mat Sci, Sci Council Japan, Phys Soc Japan, Japan Soc Appl Phys, Chem Soc Japan, Japanese Soc Radiat Chem, Japan Radioisotope Assoc DE argon; pores; positronium; simulation; zeolite ID LIFETIME; MODEL; SCATTERING; ZEOLITES; SURFACES; GASES AB Positronium (Ps) is simulated using Path Integral Monte Carlo (PIMC). This method can reproduce the results of previous simple theories in which a single quantum particle is used to represent Ps within an idealized pore. In addition, our calculations treat the e(-) and e(+) of Ps exactly and realistically model interactions with solid atoms, thereby correcting and extending the simpler theory. We study the pick-off lifetime of o-Ps and the internal contact density, kappa, which controls the self-annihilation behavior, for Ps in model voids (spherical pores), defects in a solid (argon), and microporous solids (zeolites). C1 Swarthmore Coll, Swarthmore, PA 19081 USA. Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Bug, ALR (reprint author), Swarthmore Coll, Swarthmore, PA 19081 USA. NR 27 TC 6 Z9 7 U1 0 U2 0 PU TRANS TECH PUBLICATIONS LTD PI STAFA-ZURICH PA LAUBLSRUTISTR 24, CH-8717 STAFA-ZURICH, SWITZERLAND SN 0255-5476 BN 0-87849-936-9 J9 MATER SCI FORUM PY 2004 VL 445-6 BP 375 EP 379 PG 5 WC Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA BY55H UT WOS:000189406800113 ER PT S AU Denison, AB Meulenberg, R Eijt, SWH Van Veen, A Mijnarends, PE Barbiellini, B Bansil, A Fischer, C Weber, MH Lynn, KG AF Denison, AB Meulenberg, R Eijt, SWH Van Veen, A Mijnarends, PE Barbiellini, B Bansil, A Fischer, C Weber, MH Lynn, KG BE Hyodo, T Kobayashi, Y Nagashima, Y Saito, H TI Radial electron momentum densities of colloidal CdSe nanocrystals determined by positron beam analysis SO POSITRON ANNIHILATION, ICPA-13, PROCEEDINGS SE Materials Science Forum LA English DT Article; Proceedings Paper CT 13th International Conference on Positron Annihilation (ICPA-13) CY SEP 07-12, 2003 CL Kyoto, JAPAN SP Commemorat Assoc Japan World Exposit (1970), Res Fdn Mat Sci, Sci Council Japan, Phys Soc Japan, Japan Soc Appl Phys, Chem Soc Japan, Japanese Soc Radiat Chem, Japan Radioisotope Assoc DE CdSe; electronic structure; positron annihilation; quantum dots; surface AB We present depth-resolved positron 2D angular correlation of annihilation radiation (2DACAR) experiments on CdSe quantum dots in the diameter range from 2.5 to 6 run, deposited as micrometer thin layers. The average radial distribution of the valence electron momentum density (EMD) of CdSe quantum dots so extracted reveals a systematic dependence upon particle size. The observed quantum confinement related changes near the Jones zone momentum of similar to0.8 a.u. agree with our earlier coincidence Doppler study addressing this point. We focus here on the behavior of the average radial EMD, which is found to show an increase in the low-momentum range (<0.6 a.u.) and a reduction in the high-momentum range (>1.6 a.u.) with respect to that measured on a bulk CdSe single crystal. First-principles calculations based on the Koninga-Kohn-Rostoker (KKR) method were performed to gain insight into this effect. C1 Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. Delft Univ Technol, Interfac Reactor Inst IRI, Delft, Netherlands. Northeastern Univ, Dept Phys, Boston, MA 02115 USA. Washington State Univ, Ctr Mat Res, Pullman, WA 99164 USA. RP Lawrence Livermore Natl Lab, 7000 E Ave, Livermore, CA 94551 USA. RI Barbiellini, Bernardo/K-3619-2015 OI Barbiellini, Bernardo/0000-0002-3309-1362 NR 8 TC 2 Z9 2 U1 0 U2 2 PU TRANS TECH PUBLICATIONS LTD PI DURNTEN-ZURICH PA KREUZSTRASSE 10, 8635 DURNTEN-ZURICH, SWITZERLAND SN 0255-5476 BN 0-87849-936-9 J9 MATER SCI FORUM PY 2004 VL 445-6 BP 395 EP 397 PG 3 WC Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter SC Materials Science; Physics GA BY55H UT WOS:000189406800117 ER PT J AU Abe, C Nagle, NJ Parsons, C Brannon, J Noll, SL AF Abe, C. Nagle, N. J. Parsons, C. Brannon, J. Noll, S. L. TI High protein corn distiller dried grains as a feed ingredient SO POULTRY SCIENCE LA English DT Meeting Abstract DE turkey; corn; distillers dried grain C1 [Abe, C.; Brannon, J.; Noll, S. L.] Univ Minnesota, St Paul, MN 55108 USA. [Nagle, N. J.] Natl Bioenergy Ctr, Golden, CO USA. [Parsons, C.] Univ Illinois, Urbana, IL 61801 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU POULTRY SCIENCE ASSOC INC PI SAVOY PA 1111 N DUNLAP AVE, SAVOY, IL 61874-9604 USA SN 0032-5791 J9 POULTRY SCI JI Poult. Sci. PY 2004 VL 83 SU 1 BP 264 EP 264 PG 1 WC Agriculture, Dairy & Animal Science SC Agriculture GA V45UO UT WOS:000203095401102 ER PT B AU Chinthavali, MS Ozpineci, B Tolbert, LA AF Chinthavali, MS Ozpineci, B Tolbert, LA GP ieee TI Temperature-dependent characterization of SiC power electronic devices SO POWER ELECTRONICS IN TRANSPORTATION LA English DT Proceedings Paper CT 8th Workshop on Power Electronics in Transportation (WPET 2004) CY OCT 21-22, 2004 CL Novi, MI SP IEEE Power Elect Soc, IEEE SE Michigan Sect, Soc Automobile Engineers, IEEE Vehicular Technol Soc ID DIODES AB Silicon (Si) unipolar devices are limited in breakdown voltages because of the low electric field strength of the material. Silicon carbide (SiC) unipolar devices, on the other hand, have 10 times greater electric field strength and hence they have much higher breakdown voltages compared with Si. They also have low static and dynamic losses compared with Si devices. Four commercially available SiC Schottky diodes at different voltage and current ratings and an experimental SiC VJFET sample have been tested to characterize their performance at different temperatures. Their forward characteristics and switching characteristics in a temperature range of -50degreesC to 175degreesC are presented. The results for the SiC Schottky diodes are compared with the results for a Si pn diode with comparable ratings. The experimental data were analyzed to obtain the device performance parameters like the on-state resistance and the switching losses. C1 Oak Ridge Inst Sci & Educ, Oak Ridge, TN 37831 USA. RP Chinthavali, MS (reprint author), Oak Ridge Inst Sci & Educ, Oak Ridge, TN 37831 USA. OI Tolbert, Leon/0000-0002-7285-609X NR 10 TC 5 Z9 5 U1 0 U2 4 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-8538-1 PY 2004 BP 43 EP 47 DI 10.1109/PET.2004.1393790 PG 5 WC Engineering, Electrical & Electronic; Transportation Science & Technology SC Engineering; Transportation GA BBE17 UT WOS:000225102200005 ER PT B AU Bohn, TP Lorenz, RD Olson, ER AF Bohn, TP Lorenz, RD Olson, ER GP ieee TI Measurement of in-situ currents in a hybrid electric vehicle integrated power module using giant magnetoresistive sensors SO POWER ELECTRONICS IN TRANSPORTATION LA English DT Proceedings Paper CT 8th Workshop on Power Electronics in Transportation (WPET 2004) CY OCT 21-22, 2004 CL Novi, MI SP IEEE Power Elect Soc, IEEE SE Michigan Sect, Soc Automobile Engineers, IEEE Vehicular Technol Soc AB Current hybrid electric vehicles, such as the Toyota Prius, use integrated power electronics modules (IPEM) to reduce cost, package size and interconnects. The Prius' dual inverter module allows power to flow directly from generator drive to motor drive precluding external measurement of that branch current. A highly sensitive Giant Magneto Resistive effect (GMR) point field detector is used for in-situ current measurement directly inside the IPEM module. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Bohn, TP (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. 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 0-7803-8538-1 PY 2004 BP 55 EP 59 DI 10.1109/PET.2004.1393795 PG 5 WC Engineering, Electrical & Electronic; Transportation Science & Technology SC Engineering; Transportation GA BBE17 UT WOS:000225102200007 ER PT B AU Su, GJ Hsu, JS AF Su, GJ Hsu, JS GP ieee TI A five-leg inverter for driving a traction motor and a compressor motor SO POWER ELECTRONICS IN TRANSPORTATION LA English DT Proceedings Paper CT 8th Workshop on Power Electronics in Transportation (WPET 2004) CY OCT 21-22, 2004 CL Novi, MI SP IEEE Power Elect Soc, IEEE SE Michigan Sect, Soc Automobile Engineers, IEEE Vehicular Technol Soc DE EV/HEV traction drive; EV/HEV compressor drive; five-leg inverter; two-phase motor; zero-sequence current AB This paper presents an integrated inverter for speed control of a traction motor and a compressor motor to reduce the compressor drive cost in EV/HEV applications. The inverter comprises of five phase-legs; three of which are for control of a three-phase traction motor and the remaining two phase-legs for a two-phase compressor motor with three terminals. The common terminal of the two-phase motor is tied to the neutral point of the three-phase traction motor to eliminate the requirement of a third phase leg. Further cost savings are made possible by sharing the switching devices, dc bus filter capacitors, gate drive power supplies, and control circuit. Simulation and experimental results are included to verify that speed control of the two motors is independent from each other. C1 Oak Ridge Natl Lab, Natl Transportat Res Ctr, Knoxville, TN USA. RP Su, GJ (reprint author), Oak Ridge Natl Lab, Natl Transportat Res Ctr, Knoxville, TN 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 0-7803-8538-1 PY 2004 BP 117 EP 123 DI 10.1109/PET.2004.1393813 PG 7 WC Engineering, Electrical & Electronic; Transportation Science & Technology SC Engineering; Transportation GA BBE17 UT WOS:000225102200015 ER PT S AU Dandekar, RA AF Dandekar, RA BE DomingoFerrer, J Torra, V TI Maximum utility-minimum information loss table server design for statistical disclosure control of tabular data SO PRIVACY IN STATISTICAL DATABASES, PROCEEDINGS SE ANNALS OF THE NEW YORK ACADEMY OF SCIENCES LA English DT Article; Proceedings Paper CT Conference on Privacy in Statistical DataBases (PSD 2004) CY JUN 09-11, 2004 CL Barcelona, SPAIN AB Statistical agencies typically serve a diverse group of end users with varying information needs, Accommodating the conflicting needs for information in combination with stringent rules for statistical disclosure limitation (SDL) of statistical information creates a special challenge. We provide a generic table server design for SDL of tabular data to meet this challenge. Our table server design works equally well with counts data and magnitude data, and is compatible with commonly used cell perturbation methods and cell suppression methods used for the statistical disclosure control of sensitive tabular data. We demonstrate the scope and the effectiveness of our table server design on counts and magnitude data by using a simplified controlled tabular adjustment procedure proposed by Dandekar (2003). In addition to ad hoc queries, the information compiled using our table server design could be used to capture multi-way interactions of counts data and magnitude data either in a static environment or in dynamic mode. C1 US DOE, Energy Informat Adm, Washington, DC 20585 USA. RP Dandekar, RA (reprint author), US DOE, Energy Informat Adm, Washington, DC 20585 USA. NR 3 TC 6 Z9 6 U1 0 U2 1 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0077-8923 BN 3-540-22118-2 J9 ANN NY ACAD SCI JI Ann.NY Acad.Sci. PY 2004 VL 3050 BP 121 EP 135 PG 15 WC Computer Science, Theory & Methods; Statistics & Probability SC Computer Science; Mathematics GA BAG23 UT WOS:000222059700010 ER PT S AU Dickson, TL Williams, PT Bass, BR Kirk, MT AF Dickson, TL Williams, PT Bass, BR Kirk, MT BE Johnson, WS Hillberry, BM TI Preliminary results of the United States nuclear regulatory commission's pressurized thermal shock rule reevaluation project SO PROBABILISTIC ASPECTS OF LIFE PREDICTION SE AMERICAN SOCIETY FOR TESTING AND MATERIALS SPECIAL TECHNICAL PUBLICATION LA English DT Proceedings Paper CT Symposium on Probabilistic Aspects of Life Prediction CY NOV 06-07, 2002 CL Miami, FL SP ASTM Int Comm E8 DE fracture mechanics; pressurized thermal shock; probabilistic; Monte Carlo AB The current federal regulations to insure that nuclear reactor pressure vessels (RPVs) maintain their structural integrity when subjected to transients such as pressurized thermal shock (PTS) events were derived from computational models developed in the early to mid-1980s. Since that time, there have been advancements in relevant technologies associated with the physics of PTS events that impact RPV integrity assessment. Preliminary. studies performed in 1999 suggested that application of an improved technology could reduce the conservatism in the current regulations while continuing to provide reasonable assurance of adequate protection to public health and safety. A relaxation of PTS regulations could have profound implications for plant license-extension considerations. Based on the above, the United States Nuclear Regulatory Commission (USNRC) initiated in 1999 a program to re-evaluate the current PTS regulations within the framework established by modem probabilistic risk assessment techniques. As part of the USNRC PTS project, improved computational models have evolved through interactions between experts in the relevant disciplines of thermal hydraulics, probabilistic risk assessment, human reliability analysis, materials embrittlement effects on fracture toughness (crack initiation and arrest), fracture mechanics methodology, and fabrication-induced flaw characterization. The experts have been from the NRC staff, their contractors, and representatives from the nuclear industry. These improved models have been implemented into the FAVOR (Fracture Analysis of Vessels: Oak Ridge) computer code which is an applications tool for performing risk-informed structural integrity evaluations of embrittled RPVs subjected to transient thermal-hydraulic loading conditions. Recently, the FAVOR code was applied to a domestic commercial pressurized water reactor to evaluate the adequacy of the current regulations and to determine if a technical basis can be established to support a change in the current regulations. This paper gives an overview of the improved computational methodology and presents some results of the preliminary analyses. C1 Oak Ridge Natl Lab, Computat Sci & Engn Div, Oak Ridge, TN 37831 USA. RP Dickson, TL (reprint author), Oak Ridge Natl Lab, Computat Sci & Engn Div, POB 2009,Mail Stop 8056, Oak Ridge, TN 37831 USA. NR 16 TC 0 Z9 0 U1 0 U2 1 PU AMERICAN SOCIETY TESTING AND MATERIALS PI W CONSHOHOCKEN PA 100 BARR HARBOR DRIVE, W CONSHOHOCKEN, PA 19428-2959 USA SN 1040-1695 BN 0-8031-3478-9 J9 AM SOC TEST MATER PY 2004 VL 1450 BP 167 EP 182 DI 10.1520/STP11286S PG 16 WC Engineering, Multidisciplinary; Engineering, Mechanical; Mathematics, Interdisciplinary Applications SC Engineering; Mathematics GA BBD75 UT WOS:000225040500012 ER PT J AU Field, RV Grigoriu, M AF Field, RV Grigoriu, M TI On the accuracy of the polynomial chaos approximation SO PROBABILISTIC ENGINEERING MECHANICS LA English DT Article; Proceedings Paper CT 4th International Conference on Computational Stochastic Mechanics CY JUN 09-SEP 12, 2002 CL Corfu, GREECE DE polynomial chaos; Karhunen-Loeve expansion; random variables; stochastic processes ID STOCHASTIC-PROCESSES; SIMULATION; EXPANSION AB Polynomial chaos representations for non-Gaussian random variables and stochastic processes are infinite series of Hermite polynomials of standard Gaussian random variables with deterministic coefficients. Finite truncations of these series are referred to as polynomial chaos (PC) approximations. This paper explores features and limitations of PC approximations. Metrics are developed to assess the accuracy of the PC approximation. A collection of simple, but relevant examples is examined in this paper. The number of terms in the PC approximations used in the examples exceeds the number of terms retained in most current applications. For the examples considered, it is demonstrated that (1) the accuracy of the PC approximation improves in some metrics as additional terms are retained, but does not exhibit this behavior in all metrics considered in the paper, (2) PC approximations for strictly stationary, non-Gaussian stochastic processes are initially nonstationary and gradually may approach weak stationarity as the number of terms retained increases, and (3) the development of PC approximations for certain processes may become computationally demanding, or even prohibitive, because of the large number of coefficients that need to be calculated. However, there have been many applications in which PC approximations have been successful. (C) 2003 Elsevier Ltd. All rights reserved. C1 Sandia Natl Labs, Struct Dynam Res Dept, Albuquerque, NM 87185 USA. Cornell Univ, Sch Civil & Environm Engn, Ithaca, NY 14853 USA. RP Field, RV (reprint author), Cornell Univ, Sch Civil & Environm Engn, Ithaca, NY 14853 USA. EM rf63@cornell.edu; mdg12@cornell.edu OI Field, Richard/0000-0002-2765-7032 NR 22 TC 68 Z9 68 U1 0 U2 12 PU ELSEVIER SCI LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND SN 0266-8920 J9 PROBABILIST ENG MECH JI Probab. Eng. Eng. Mech. PD JAN-APR PY 2004 VL 19 IS 1-2 BP 65 EP 80 DI 10.1016/j.probengmech.2003.11.017 PG 16 WC Engineering, Mechanical; Mechanics; Statistics & Probability SC Engineering; Mechanics; Mathematics GA 800ZW UT WOS:000220067200008 ER PT B AU Covan, JM AF Covan, JM BE Spitzer, C Schmocker, U Dang, VN TI A paradigm for energy and transportation system surety in the 21st century SO PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOL 1- 6 LA English DT Proceedings Paper CT Joint Meeting of the 7th International Conference on Probabilistic Safety Assessment and Management/European Safety and Reliability Conference CY JUN 14-18, 2004 CL Berlin, GERMANY SP TUV Suddeutschland, Swiss Fed Nucl Safety Inspectorate, Paul Scherrer Inst, AREVA, Basler & Hofmann, Gottlieb Daimler & Karl Benz Fdn, Swissnucl, VGB PowerTech, ABS Consulting, European Commiss, Joint Res Ctr, European Safety, Reliabil & Data Assoc, US Fed Aviat Adm, Idaho Natl Engn & Environm Lab, Risknowlogy, Scientech Inc, VDI, Assoc Engineers C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Covan, JM (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL RD FARNCOMBE, GODALMING GU7 1NH, SURREY, ENGLAND BN 1-85233-827-X PY 2004 BP 585 EP 590 PG 6 WC Engineering, Multidisciplinary; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA BAU29 UT WOS:000223579900095 ER PT B AU Vigil, M Gordon, D Stringfield, L Durrer, R Greutman, M AF Vigil, M Gordon, D Stringfield, L Durrer, R Greutman, M BE Spitzer, C Schmocker, U Dang, VN TI Chemistry and metallurgy research replacement (CMRR) facility risk analysis study SO PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOL 1- 6 LA English DT Proceedings Paper CT Joint Meeting of the 7th International Conference on Probabilistic Safety Assessment and Management/European Safety and Reliability Conference CY JUN 14-18, 2004 CL Berlin, GERMANY SP TUV Suddeutschland, Swiss Fed Nucl Safety Inspectorate, Paul Scherrer Inst, AREVA, Basler & Hofmann, Gottlieb Daimler & Karl Benz Fdn, Swissnucl, VGB PowerTech, ABS Consulting, European Commiss, Joint Res Ctr, European Safety, Reliabil & Data Assoc, US Fed Aviat Adm, Idaho Natl Engn & Environm Lab, Risknowlogy, Scientech Inc, VDI, Assoc Engineers C1 Los Alamos Natl Lab, Los Alamos, NM USA. RP Vigil, M (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM USA. NR 3 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL RD FARNCOMBE, GODALMING GU7 1NH, SURREY, ENGLAND BN 1-85233-827-X PY 2004 BP 779 EP 784 PG 6 WC Engineering, Multidisciplinary; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA BAU29 UT WOS:000223579900126 ER PT B AU Richardson, J Gordon, D Tell, R Kern, K Vigil, M Romero, J AF Richardson, J Gordon, D Tell, R Kern, K Vigil, M Romero, J BE Spitzer, C Schmocker, U Dang, VN TI Bounding fire accident for LANL plutonium facility SO PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOL 1- 6 LA English DT Proceedings Paper CT Joint Meeting of the 7th International Conference on Probabilistic Safety Assessment and Management/European Safety and Reliability Conference CY JUN 14-18, 2004 CL Berlin, GERMANY SP TUV Suddeutschland, Swiss Fed Nucl Safety Inspectorate, Paul Scherrer Inst, AREVA, Basler & Hofmann, Gottlieb Daimler & Karl Benz Fdn, Swissnucl, VGB PowerTech, ABS Consulting, European Commiss, Joint Res Ctr, European Safety, Reliabil & Data Assoc, US Fed Aviat Adm, Idaho Natl Engn & Environm Lab, Risknowlogy, Scientech Inc, VDI, Assoc Engineers AB This paper examines the analyses performed for the bounding fire accident for the Los Alamos National Laboratory (LANL) Technical Area 55 (TA-55) Plutonium Facility (PF-4). C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Richardson, J (reprint author), Los Alamos Natl Lab, POB 1663,MS E578, Los Alamos, NM 87545 USA. NR 2 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL RD FARNCOMBE, GODALMING GU7 1NH, SURREY, ENGLAND BN 1-85233-827-X PY 2004 BP 785 EP 790 PG 6 WC Engineering, Multidisciplinary; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA BAU29 UT WOS:000223579900127 ER PT B AU Bari, R Roglans, J Denning, R Mladineo, S AF Bari, R Roglans, J Denning, R Mladineo, S BE Spitzer, C Schmocker, U Dang, VN TI Assessing the proliferation resistance of innovative nuclear fuel cycles SO PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOL 1- 6 LA English DT Proceedings Paper CT Joint Meeting of the 7th International Conference on Probabilistic Safety Assessment and Management/European Safety and Reliability Conference CY JUN 14-18, 2004 CL Berlin, GERMANY SP TUV Suddeutschland, Swiss Fed Nucl Safety Inspectorate, Paul Scherrer Inst, AREVA, Basler & Hofmann, Gottlieb Daimler & Karl Benz Fdn, Swissnucl, VGB PowerTech, ABS Consulting, European Commiss, Joint Res Ctr, European Safety, Reliabil & Data Assoc, US Fed Aviat Adm, Idaho Natl Engn & Environm Lab, Risknowlogy, Scientech Inc, VDI, Assoc Engineers AB The National Nuclear Security Administration is developing methods for nonproliferation assessments to support the development and implementation of U.S. nonproliferation policy. This paper summarizes the key results of that effort. Proliferation resistance is the degree of difficulty that a nuclear material, facility, process, or activity poses to the acquisition of one or more nuclear weapons. A top-level measure of proliferation resistance for a fuel cycle system is developed here from a hierarchy of metrics. At the lowest level, intrinsic and extrinsic barriers to proliferation are defined. These barriers are recommended as a means to characterize the proliferation characteristics of a fuel cycle. Because of the complexity of nonproliferation assessments, the problem is decomposed into: metrics to be computed, barriers to proliferation, and a finite set of threats. The spectrum of potential threats of nuclear proliferation is complex and ranges from small terrorist cells to industrialized countries with advanced nuclear fuel cycles. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Bari, R (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL RD FARNCOMBE, GODALMING GU7 1NH, SURREY, ENGLAND BN 1-85233-827-X PY 2004 BP 869 EP 874 PG 6 WC Engineering, Multidisciplinary; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA BAU29 UT WOS:000223579900141 ER PT B AU Hallbert, BP Gertman, DI Marble, J Lois, E Siu, N AF Hallbert, BP Gertman, DI Marble, J Lois, E Siu, N BE Spitzer, C Schmocker, U Dang, VN TI Using information from operating experience to inform human reliability analysis SO PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOL 1- 6 LA English DT Proceedings Paper CT Joint Meeting of the 7th International Conference on Probabilistic Safety Assessment and Management/European Safety and Reliability Conference CY JUN 14-18, 2004 CL Berlin, GERMANY SP TUV Suddeutschland, Swiss Fed Nucl Safety Inspectorate, Paul Scherrer Inst, AREVA, Basler & Hofmann, Gottlieb Daimler & Karl Benz Fdn, Swissnucl, VGB PowerTech, ABS Consulting, European Commiss, Joint Res Ctr, European Safety, Reliabil & Data Assoc, US Fed Aviat Adm, Idaho Natl Engn & Environm Lab, Risknowlogy, Scientech Inc, VDI, Assoc Engineers AB This paper reports on efforts being sponsored by the U.S. NRC and performed by INEEL to develop a technical basis and perform work to extract information from sources for use in HRA. The objectives of this work are to: 1) develop a method for conducting risk-informed event analysis of human performance information that stems from operating experience at nuclear power plants and for compiling and documenting the results in a structured manner; 2) provide information from these analyses for use in risk-informed and performance-based regulatory activities; 3) create methods for information extraction and a repository for this information that, likewise, support HRA methods and their applications. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Hallbert, BP (reprint author), Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL RD FARNCOMBE, GODALMING GU7 1NH, SURREY, ENGLAND BN 1-85233-827-X PY 2004 BP 977 EP 982 PG 6 WC Engineering, Multidisciplinary; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA BAU29 UT WOS:000223579900158 ER PT B AU Eide, S Zeek, D AF Eide, S Zeek, D BE Spitzer, C Schmocker, U Dang, VN TI Mitigating systems performance index baselines SO PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOL 1- 6 LA English DT Proceedings Paper CT Joint Meeting of the 7th International Conference on Probabilistic Safety Assessment and Management/European Safety and Reliability Conference CY JUN 14-18, 2004 CL Berlin, GERMANY SP TUV Suddeutschland, Swiss Fed Nucl Safety Inspectorate, Paul Scherrer Inst, AREVA, Basler & Hofmann, Gottlieb Daimler & Karl Benz Fdn, Swissnucl, VGB PowerTech, ABS Consulting, European Commiss, Joint Res Ctr, European Safety, Reliabil & Data Assoc, US Fed Aviat Adm, Idaho Natl Engn & Environm Lab, Risknowlogy, Scientech Inc, VDI, Assoc Engineers AB This paper discusses the technical assessment of recommended train unavailability and component unreliability baselines for the US Nuclear Regulatory Commission Mitigating Systems Performance Index. To perform this evaluation, recent data were compared with the recommended baselines. Comparisons indicate that the recommended baselines appear to accurately represent recent (1999 - 2001) industry experience. C1 INEEL, Idaho Falls, ID 83415 USA. RP Eide, S (reprint author), INEEL, POB 1625, Idaho Falls, ID 83415 USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL RD FARNCOMBE, GODALMING GU7 1NH, SURREY, ENGLAND BN 1-85233-827-X PY 2004 BP 1158 EP 1162 PG 5 WC Engineering, Multidisciplinary; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA BAU29 UT WOS:000223579900187 ER PT B AU Jaeger, C AF Jaeger, C BE Spitzer, C Schmocker, U Dang, VN TI Security risk assessment methodology for communities (RAM-C-(TM)) SO PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOL 1- 6 LA English DT Proceedings Paper CT Joint Meeting of the 7th International Conference on Probabilistic Safety Assessment and Management/European Safety and Reliability Conference CY JUN 14-18, 2004 CL Berlin, GERMANY SP TUV Suddeutschland, Swiss Fed Nucl Safety Inspectorate, Paul Scherrer Inst, AREVA, Basler & Hofmann, Gottlieb Daimler & Karl Benz Fdn, Swissnucl, VGB PowerTech, ABS Consulting, European Commiss, Joint Res Ctr, European Safety, Reliabil & Data Assoc, US Fed Aviat Adm, Idaho Natl Engn & Environm Lab, Risknowlogy, Scientech Inc, VDI, Assoc Engineers AB Sandia National Laboratories (SNL) has developed a number of security risk assessment methodologies (RAMs) for various infrastructures including dams, water systems, electrical transmission, chemical facilities and communities. All of these RAMs consider potential malevolent attacks from different threats, possible undesired events and consequences and determine potential adversary success. They focus on the assessment of these infrastructures to help identify security weaknesses and develop measures to help mitigate the consequences from possible adversary attacks. This paper will focus on RAM-C(TM), the security risk assessment methodology for communities. There are many reasons for a community to conduct a security risk assessment. They include: providing a way to identify vulnerabilities, helping a community to be better prepared in the event of an adversary attack, providing justification for resources to address identified vulnerabilities and planning for future projects. RAM-C(TM) provides a systematic, risk-based approach useable by public safety and emergency planners to determine relative risk and provides useful information in making security risk decisions. RAM-C(TM) consists of a number of steps starting with a screening step which selects facilities based on a documented process; characterization of the community and facilities; determination of severity of consequences for identified undesired events; determination of the community protection goals and defining the threat; defining existing baseline safeguard measures; analyzing protection system effectiveness against identified scenarios, determining a relative risk and finally deciding if that risk is too high. If the risk is too high then possible countermeasures and mitigation measures are considered. RAM-C(TM) has been used by a number of communities within the United States. From these assessments there have been many results. Some communities have been surprised by the vulnerabilities that have been identified; have identified the need to test procedures and responses to many different situations; have identified the need to have redundancy in certain systems and have identified who within their community are valuable resources. The RAM-C(TM) process is a systematic way to assess vulnerabilities and make decisions based on risk. It has provided valuable information to community planners. C1 Sandia Natl Labs, Secur Syst & Technol Ctr, Albuquerque, NM 87185 USA. RP Jaeger, C (reprint author), Sandia Natl Labs, Secur Syst & Technol Ctr, POB 5800,MS 0759, Albuquerque, NM 87185 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL RD FARNCOMBE, GODALMING GU7 1NH, SURREY, ENGLAND BN 1-85233-827-X PY 2004 BP 1328 EP 1332 PG 5 WC Engineering, Multidisciplinary; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA BAU29 UT WOS:000223579900214 ER PT B AU Cournoyer, ME AF Cournoyer, ME BE Spitzer, C Schmocker, U Dang, VN TI A risk determining model for hazardous material operations: Part II SO PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOL 1- 6 LA English DT Proceedings Paper CT Joint Meeting of the 7th International Conference on Probabilistic Safety Assessment and Management/European Safety and Reliability Conference CY JUN 14-18, 2004 CL Berlin, GERMANY SP TUV Suddeutschland, Swiss Fed Nucl Safety Inspectorate, Paul Scherrer Inst, AREVA, Basler & Hofmann, Gottlieb Daimler & Karl Benz Fdn, Swissnucl, VGB PowerTech, ABS Consulting, European Commiss, Joint Res Ctr, European Safety, Reliabil & Data Assoc, US Fed Aviat Adm, Idaho Natl Engn & Environm Lab, Risknowlogy, Scientech Inc, VDI, Assoc Engineers C1 Los Alamos Natl Lab, Div Nucl Mat Technol, Los Alamos, NM 87545 USA. RP Cournoyer, ME (reprint author), Los Alamos Natl Lab, Div Nucl Mat Technol, POB 1663, Los Alamos, NM 87545 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL RD FARNCOMBE, GODALMING GU7 1NH, SURREY, ENGLAND BN 1-85233-827-X PY 2004 BP 1534 EP 1540 PG 7 WC Engineering, Multidisciplinary; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA BAU29 UT WOS:000223579900247 ER PT B AU Blackman, H Gertman, D AF Blackman, H Gertman, D BE Spitzer, C Schmocker, U Dang, VN TI Socio-technical organization and cognition: A socio-organizational approach to risk based assessment and design SO PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOL 1- 6 LA English DT Proceedings Paper CT Joint Meeting of the 7th International Conference on Probabilistic Safety Assessment and Management/European Safety and Reliability Conference CY JUN 14-18, 2004 CL Berlin, GERMANY SP TUV Suddeutschland, Swiss Fed Nucl Safety Inspectorate, Paul Scherrer Inst, AREVA, Basler & Hofmann, Gottlieb Daimler & Karl Benz Fdn, Swissnucl, VGB PowerTech, ABS Consulting, European Commiss, Joint Res Ctr, European Safety, Reliabil & Data Assoc, US Fed Aviat Adm, Idaho Natl Engn & Environm Lab, Risknowlogy, Scientech Inc, VDI, Assoc Engineers AB The role of socio-technical factors (i.e., management and organizational factors) in events has recently been acknowledged in a growing number of studies. These factors influence systems performance in the workplace through their contribution to: worker cognition and sensitivity to safe practices, adherence to procedures, and the implementation of safety practices including design practices and procedures review. Modem day risk assessment approaches such as probabilistic risk assessment (PRA) methods are particularly challenged in considering socio-technical factors as part of the risk assessment process. The development of a socio-technical modeling framework to help interpret events will facilitate integration of these factors in PRA. This paper presents a preliminary socio-technical model, SOCRATES, applies it to the JCO criticality event, and demonstrates a process by which a number of errors are mapped to various underlying socio-technical factors. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Blackman, H (reprint author), Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL RD FARNCOMBE, GODALMING GU7 1NH, SURREY, ENGLAND BN 1-85233-827-X PY 2004 BP 1585 EP 1590 PG 6 WC Engineering, Multidisciplinary; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA BAU29 UT WOS:000223579900255 ER PT B AU Mubayi, V Bari, RA Grove, E Azarm, MA Damon, DR Lui, CH Shane, RM AF Mubayi, V Bari, RA Grove, E Azarm, MA Damon, DR Lui, CH Shane, RM BE Spitzer, C Schmocker, U Dang, VN TI The US nuclear regulatory commission program on risk-informing the materials and waste arenas: A decision-making framework SO PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOL 1- 6 LA English DT Proceedings Paper CT Joint Meeting of the 7th International Conference on Probabilistic Safety Assessment and Management/European Safety and Reliability Conference CY JUN 14-18, 2004 CL Berlin, GERMANY SP TUV Suddeutschland, Swiss Fed Nucl Safety Inspectorate, Paul Scherrer Inst, AREVA, Basler & Hofmann, Gottlieb Daimler & Karl Benz Fdn, Swissnucl, VGB PowerTech, ABS Consulting, European Commiss, Joint Res Ctr, European Safety, Reliabil & Data Assoc, US Fed Aviat Adm, Idaho Natl Engn & Environm Lab, Risknowlogy, Scientech Inc, VDI, Assoc Engineers AB This paper describes a process for risk-informed decision-making of regulatory issues and actions by the Office of Nuclear Materials Safety and Safeguards of the U.S. Nuclear Regulatory Commission. The process, currently under development, consists of screening the issue to determine its suitability for risk-informing, and using relevant risk information combined with suggested decision algorithms to arrive at a risk-informed decision. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Mubayi, V (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL RD FARNCOMBE, GODALMING GU7 1NH, SURREY, ENGLAND BN 1-85233-827-X PY 2004 BP 1660 EP 1667 PG 8 WC Engineering, Multidisciplinary; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA BAU29 UT WOS:000223579900267 ER PT B AU Robinson, MA Lynch, CM Gordon, DJ AF Robinson, MA Lynch, CM Gordon, DJ BE Spitzer, C Schmocker, U Dang, VN TI Establishment of quantitative consequence analyses criteria for the Los Alamos National Laboratory nuclear materials technology division SO PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOL 1- 6 LA English DT Proceedings Paper CT Joint Meeting of the 7th International Conference on Probabilistic Safety Assessment and Management/European Safety and Reliability Conference CY JUN 14-18, 2004 CL Berlin, GERMANY SP TUV Suddeutschland, Swiss Fed Nucl Safety Inspectorate, Paul Scherrer Inst, AREVA, Basler & Hofmann, Gottlieb Daimler & Karl Benz Fdn, Swissnucl, VGB PowerTech, ABS Consulting, European Commiss, Joint Res Ctr, European Safety, Reliabil & Data Assoc, US Fed Aviat Adm, Idaho Natl Engn & Environm Lab, Risknowlogy, Scientech Inc, VDI, Assoc Engineers AB The Nuclear Materials Technology Division at the Los Alamos National Laboratory performs consequence analysis on postulated accident scenarios identified during facility hazard analyses. While a comprehensive set of qualitative criteria was established for consequence analysis, quantitative criteria have historically been exiguous. The sparsity of established quantitative criteria coupled with ambiguities in the existing qualitative criteria has contributed to inconsistencies in these analyses. This paper will detail recent changes the NMT Division has made in its consequence analysis methodology designed to increase its objectivity and to facilitate consistency. These changes include the establishment of a complete set of quantitative consequence-severity criteria for accident phenomenon common to the NMT Division facilities as applied to receptors of interest. C1 Los Alamos Natl Lab, Div Nucl Mat Technol, Los Alamos, NM 87545 USA. RP Robinson, MA (reprint author), Los Alamos Natl Lab, Div Nucl Mat Technol, POB 1663, Los Alamos, NM 87545 USA. NR 1 TC 0 Z9 0 U1 0 U2 1 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL RD FARNCOMBE, GODALMING GU7 1NH, SURREY, ENGLAND BN 1-85233-827-X PY 2004 BP 1668 EP 1673 PG 6 WC Engineering, Multidisciplinary; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA BAU29 UT WOS:000223579900268 ER PT B AU Bari, RA Mubayi, V Grove, E Azarm, MA Chow, E Rubin, A AF Bari, RA Mubayi, V Grove, E Azarm, MA Chow, E Rubin, A BE Spitzer, C Schmocker, U Dang, VN TI Risk guidelines for the nuclear materials and waste arenas SO PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOL 1- 6 LA English DT Proceedings Paper CT Joint Meeting of the 7th International Conference on Probabilistic Safety Assessment and Management/European Safety and Reliability Conference CY JUN 14-18, 2004 CL Berlin, GERMANY SP TUV Suddeutschland, Swiss Fed Nucl Safety Inspectorate, Paul Scherrer Inst, AREVA, Basler & Hofmann, Gottlieb Daimler & Karl Benz Fdn, Swissnucl, VGB PowerTech, ABS Consulting, European Commiss, Joint Res Ctr, European Safety, Reliabil & Data Assoc, US Fed Aviat Adm, Idaho Natl Engn & Environm Lab, Risknowlogy, Scientech Inc, VDI, Assoc Engineers AB The Nuclear Regulatory Commission's (NRC) Office of Nuclear Material Safety and Safeguards (NMSS) regulates a wide range of materials and waste facilities and activities. In 1999, the Commission directed the staff to develop appropriate risk guidelines as one part of an overall framework to risk-inform NMSS regulatory activities. This paper presents the current status of work on draft risk guidelines for the nuclear materials and waste arenas and focuses on risk from accidents at operating facilities or activities. Both qualitative and quantitative guidelines are under consideration for public and worker health and safety. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Bari, RA (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL RD FARNCOMBE, GODALMING GU7 1NH, SURREY, ENGLAND BN 1-85233-827-X PY 2004 BP 1918 EP 1923 PG 6 WC Engineering, Multidisciplinary; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA BAU29 UT WOS:000223579900308 ER PT B AU Nowlen, SP AF Nowlen, SP BE Spitzer, C Schmocker, U Dang, VN TI Cable failure modes and effects risk analysis perspectives SO PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOL 1- 6 LA English DT Proceedings Paper CT Joint Meeting of the 7th International Conference on Probabilistic Safety Assessment and Management/European Safety and Reliability Conference CY JUN 14-18, 2004 CL Berlin, GERMANY SP TUV Suddeutschland, Swiss Fed Nucl Safety Inspectorate, Paul Scherrer Inst, AREVA, Basler & Hofmann, Gottlieb Daimler & Karl Benz Fdn, Swissnucl, VGB PowerTech, ABS Consulting, European Commiss, Joint Res Ctr, European Safety, Reliabil & Data Assoc, US Fed Aviat Adm, Idaho Natl Engn & Environm Lab, Risknowlogy, Scientech Inc, VDI, Assoc Engineers AB A March 1975 cable fire at the Browns Ferry Nuclear Power Plant in the United States provided new insights into the impact of fire-induced cable damage on electrical circuits. New fire protection requirements promulgated by the USNRC following this fire require that licensee to conduct a post-fire safe shutdown analysis that includes consideration of fire-induced circuit effects. Cable failure modes and effects circuit analysis is an ongoing area of technical challenge and regulatory focus. Effort are underway to develop risk-informed approaches to resolution of the remaining challenges. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Nowlen, SP (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 9 TC 0 Z9 0 U1 1 U2 1 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL RD FARNCOMBE, GODALMING GU7 1NH, SURREY, ENGLAND BN 1-85233-827-X PY 2004 BP 2481 EP 2486 PG 6 WC Engineering, Multidisciplinary; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA BAU29 UT WOS:000223579900398 ER PT B AU Nowlen, SP Najafi, B AF Nowlen, SP Najafi, B BE Spitzer, C Schmocker, U Dang, VN TI Methods advances in the EPRI/USNRC fire risk requantification study - Fire modeling SO PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOL 1- 6 LA English DT Proceedings Paper CT Joint Meeting of the 7th International Conference on Probabilistic Safety Assessment and Management/European Safety and Reliability Conference CY JUN 14-18, 2004 CL Berlin, GERMANY SP TUV Suddeutschland, Swiss Fed Nucl Safety Inspectorate, Paul Scherrer Inst, AREVA, Basler & Hofmann, Gottlieb Daimler & Karl Benz Fdn, Swissnucl, VGB PowerTech, ABS Consulting, European Commiss, Joint Res Ctr, European Safety, Reliabil & Data Assoc, US Fed Aviat Adm, Idaho Natl Engn & Environm Lab, Risknowlogy, Scientech Inc, VDI, Assoc Engineers AB The U.S. Nuclear Regulatory Commission (NRC) Office of Nuclear Regulatory Research (RES) and the Electric Power Research Institute (EPRI), in cooperation with nuclear power generating utilities in the U.S., have embarked on a joint effort to document and demonstrate state of the art methods in fire probabilistic risk assessment (PRA). One principal objective of this project is to resolve methodological issues affecting the application of fire PRA methods. This paper discusses current work in progress to establish new fire modeling approaches that appropriately address dependencies with other analysis tasks and include an explicit treatment of fire severity. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Nowlen, SP (reprint author), Sandia Natl Labs, Albuquerque, NM 87185 USA. NR 3 TC 0 Z9 0 U1 0 U2 1 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL RD FARNCOMBE, GODALMING GU7 1NH, SURREY, ENGLAND BN 1-85233-827-X PY 2004 BP 2732 EP 2737 PG 6 WC Engineering, Multidisciplinary; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA BAU29 UT WOS:000223579900438 ER PT B AU Cooper, JA AF Cooper, JA BE Spitzer, C Schmocker, U Dang, VN TI Soft Markov chain relations for modeling safety management SO PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOL 1- 6 LA English DT Proceedings Paper CT Joint Meeting of the 7th International Conference on Probabilistic Safety Assessment and Management/European Safety and Reliability Conference CY JUN 14-18, 2004 CL Berlin, GERMANY SP TUV Suddeutschland, Swiss Fed Nucl Safety Inspectorate, Paul Scherrer Inst, AREVA, Basler & Hofmann, Gottlieb Daimler & Karl Benz Fdn, Swissnucl, VGB PowerTech, ABS Consulting, European Commiss, Joint Res Ctr, European Safety, Reliabil & Data Assoc, US Fed Aviat Adm, Idaho Natl Engn & Environm Lab, Risknowlogy, Scientech Inc, VDI, Assoc Engineers AB This paper addresses the safety effects of organizational and operational factors, showing that they can be quantitatively measured. The work grew out of a preponderance of evidence that the safety "culture" (attitude of employees and management toward safety) was frequently one of the major root causes behind accidents or safety-relevant failures. The approach is called "Markov latent effects" analysis, and is based on a "Markov chain relations" structure that evolves from "Reason" (James Reason) models and Markov (A. A. Markov) probabilistic chained transitions. Since safety also depends on a multitude of factors that are best measured through well known risk analysis methods (e.g., fault trees, event trees, FMECA, physical response modeling, etc.), the Markov latent effects approach supplements and can be combined with conventional safety assessment methods. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Cooper, JA (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 7 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL RD FARNCOMBE, GODALMING GU7 1NH, SURREY, ENGLAND BN 1-85233-827-X PY 2004 BP 3177 EP 3182 PG 6 WC Engineering, Multidisciplinary; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA BAU29 UT WOS:000223579900509 ER PT B AU Bixler, NE Morrow, CW Phillips, JM Fatenejad, M Mitchell, J AF Bixler, NE Morrow, CW Phillips, JM Fatenejad, M Mitchell, J BE Spitzer, C Schmocker, U Dang, VN TI Methodology for assessment of uncertain input data for a level-3 PRA analysis of a nuclear reactor accident using MACCS2 SO PROBABILISTIC SAFETY ASSESSMENT AND MANAGEMENT, VOL 1- 6 LA English DT Proceedings Paper CT Joint Meeting of the 7th International Conference on Probabilistic Safety Assessment and Management/European Safety and Reliability Conference CY JUN 14-18, 2004 CL Berlin, GERMANY SP TUV Suddeutschland, Swiss Fed Nucl Safety Inspectorate, Paul Scherrer Inst, AREVA, Basler & Hofmann, Gottlieb Daimler & Karl Benz Fdn, Swissnucl, VGB PowerTech, ABS Consulting, European Commiss, Joint Res Ctr, European Safety, Reliabil & Data Assoc, US Fed Aviat Adm, Idaho Natl Engn & Environm Lab, Risknowlogy, Scientech Inc, VDI, Assoc Engineers C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Bixler, NE (reprint author), Sandia Natl Labs, Albuquerque, NM 87185 USA. NR 7 TC 1 Z9 1 U1 0 U2 1 PU SPRINGER-VERLAG LONDON LTD PI GODALMING PA SWEETAPPLE HOUSE CATTESHALL RD FARNCOMBE, GODALMING GU7 1NH, SURREY, ENGLAND BN 1-85233-827-X PY 2004 BP 3685 EP 3690 PG 6 WC Engineering, Multidisciplinary; Operations Research & Management Science SC Engineering; Operations Research & Management Science GA BAU29 UT WOS:000223579900589 ER PT B AU Ko, TH Berry, NM AF Ko, TH Berry, NM GP AAAI TI Agent-based modeling with social networks for terrorist recruitment SO PROCEEDING OF THE NINETEENTH NATIONAL CONFERENCE ON ARTIFICIAL INTELLIGENCE AND THE SIXTEENTH CONFERENCE ON INNOVATIVE APPLICATIONS OF ARTIFICIAL INTELLIGENCE LA English DT Proceedings Paper CT 19th National Conference on Artificial Intelligence/16th Conference on Innovative Applications of Artificial Intelligence CY JUL 25-29, 2004 CL San Jose, CA SP Amer Assoc Artificial Intelligence AB The Seldon model combines concepts from agent-based modeling and social network analysis to create a computation model of social dynamics for terrorist recruitment. The underlying recruitment model is based on a unique hybrid agent-based architecture that contains simple agents (individuals such as expatriates) and abstract agents (conceptual entities such as society and mosques). Interactions between agents are determined by multiple social networks which form and dissipate according to the actions of the individual. We have implemented a Java-based toolkit to evaluate the dynamics of social behavior and the specific dynamics associated with terrorist recruitment described by expert social scientists, creating an architecture for simple adaptation to other group phenomenon. C1 Sandia Natl Labs, Embedded Reasoning Inst, Livermore, CA 94550 USA. RP Sandia Natl Labs, Embedded Reasoning Inst, Livermore, CA 94550 USA. EM thko@sandia.gov; nmberry@sandia.gov NR 2 TC 0 Z9 1 U1 0 U2 2 PU ASSOC ADVANCEMENT ARTIFICIAL INTELLIGENCE PI PALO ALTO PA 2275 E BAYSHORE RD, STE 160, PALO ALTO, CA 94303 USA BN 0-262-51183-5 PY 2004 BP 1016 EP 1017 PG 2 WC Computer Science, Artificial Intelligence SC Computer Science GA BBP85 UT WOS:000226971400180 ER PT B AU Tirumala, VR Mancini, DC Caneba, GT AF Tirumala, VR Mancini, DC Caneba, GT GP IEEE TI In situ fabrication of thermoreversible microgels SO PROCEEDINGS OF INTERNATIONAL CONFERENCE ON INTELLIGENT SENSING AND INFORMATION PROCESSING LA English DT Proceedings Paper CT International Conference on Intelligent Sensing and Information Processing CY JAN 04-07, 2004 CL Chennai, INDIA SP Univ Melbourne, Fac Engn, IEEE Madras Sect, IEEE Neural Network Soc, Asia Pacific Neural Network Assembly, Int Neural Network Soc, Inst Smart Mat, Structure & Syst DE microgels; stimuli-response; N-isopropylacrylamide; smart microstructures ID SYNCHROTRON-RADIATION; MICROPHASE SEPARATION; MORPHOLOGY CONTROL; HYDROGEL; COPOLYMERS; DEPOSITION; GOLD AB We have developed a novel in situ fabrication procedure for stimuli-responsive microgels that can respond to an external trigger. Microgels were produced by devising a novel lithographically assisted, synchrotron-radiation-induced polymer synthesis strategy. Microgel structures based on N-isopropylacrylamide, a thermoreversible hydrogel were prepared using this technique. The morphology of these gels was found to be richly nanostructured and is reversibly responsive to a temperature change, as observed from small angle neutron scattering measurements. The pore size changes reversibly from 540 nm at room temperature (25degreesC), to 390 nm at 45degreesC. Due to their size and synthesis method, these stimuli-responsive microgels can be used as in situ sensors, actuators, micro drug delivery systems, or size-based separation units. C1 Argonne Natl Labs, Argonne, IL 60139 USA. RP Tirumala, VR (reprint author), Argonne Natl Labs, Argonne, IL 60139 USA. NR 28 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-8243-9 PY 2004 BP 196 EP 200 PG 5 WC Computer Science, Artificial Intelligence; Engineering, Electrical & Electronic SC Computer Science; Engineering GA BY67C UT WOS:000189435100038 ER PT S AU Cong, G Esser, M Parvin, B Bebis, G AF Cong, G Esser, M Parvin, B Bebis, G BE Kittler, J Petrou, M Nixon, M TI Shape metamorphism using p-Laplacian equation SO PROCEEDINGS OF THE 17TH INTERNATIONAL CONFERENCE ON PATTERN RECOGNITION, VOL 4 SE INTERNATIONAL CONFERENCE ON PATTERN RECOGNITION LA English DT Proceedings Paper CT 17th International Conference on Pattern Recognition (ICPR) CY AUG 23-26, 2004 CL British Machine Vis Assoc, Cambridge, ENGLAND SP Int Assoc Pattern Recognit, Univ Surrey, UniS, IEEE Comp Soc, HP Res Labs Bristol HO British Machine Vis Assoc ID CONTOURS; MODELS AB We present a new approach for shape metamorphism, which is a process of gradually changing a source shape (known) through intermediate shapes (unknown) into a target shape (known). The problem, when represented with implicit scalar function, is under-cons trained, and regularization is needed. Using the p-Laplacian equation (PLE), we generalize a series of regularization terms based on the gradient of the implicit function, and we show that the present methods lack additional constraints for a more stable solution. The novelty of our approach is in the deployment of a new regularization term when p --> proportional to which leads to the infinite Laplacian equation (ILE). We show that ILE minimizes the supremum of the gradient and prove that it is optimal for metamorphism since intermediate solutions are equally distributed along their normal direction. Applications of the proposed algorithm for 2D and 3D objects are demonstrated. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Cong, G (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. NR 13 TC 3 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 SN 1051-4651 BN 0-7695-2128-2 J9 INT C PATT RECOG PY 2004 BP 15 EP 18 PG 4 WC Computer Science, Artificial Intelligence SC Computer Science GA BAW23 UT WOS:000223878400004 ER PT S AU Schoenwald, DA Barton, DC Ehlen, MA AF Schoenwald, DA Barton, DC Ehlen, MA GP acc TI An agent-based simulation laboratory for economics and infrastructure interdependency SO PROCEEDINGS OF THE 2004 AMERICAN CONTROL CONFERENCE, VOLS 1-6 SE PROCEEDINGS OF THE AMERICAN CONTROL CONFERENCE LA English DT Proceedings Paper CT American Control Conference CY JUN 30-JUL 02, 2004 CL Boston, MA SP Amer Automat Control Council, Int Federat Automat Control AB Researchers at Sandia National Laboratories have developed a next-generation agent-based economic 'laboratory' (N-ABLE) for analyzing the economic factors, feedbacks, and downstream effects of infrastructure interdependencies. N-ABLE is a simulation environment in which hundreds of thousands of individual economic actors simulate real-world manufacturing firms, government agencies, and households. N-ABLE will be demonstrated on a laptop supported by both an input and output graphical user interface that will allow users to change parameters and simulate a multitude of "shocks" to the economy including electric power outages and shipping port closures. The tool has been used by several universities and three national laboratories for studies involving the economic impact of infrastructure and supply chain disruptions. C1 Sandia Natl Labs, Comp Comp Informat & Math Ctr, Albuquerque, NM 87185 USA. RP Schoenwald, DA (reprint author), Sandia Natl Labs, Comp Comp Informat & Math Ctr, POB 5800, Albuquerque, NM 87185 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 SN 0743-1619 BN 0-7803-8335-4 J9 P AMER CONTR CONF PY 2004 BP 1295 EP 1300 PG 6 WC Automation & Control Systems SC Automation & Control Systems GA BBC09 UT WOS:000224688300218 ER PT S AU Yoo, TS Garcia, HE AF Yoo, TS Garcia, HE GP acc TI Event diagnosis of discrete-event systems with uniformly and nonuniformly bounded diagnosis delays SO PROCEEDINGS OF THE 2004 AMERICAN CONTROL CONFERENCE, VOLS 1-6 SE PROCEEDINGS OF THE AMERICAN CONTROL CONFERENCE LA English DT Proceedings Paper CT American Control Conference CY JUN 30-JUL 02, 2004 CL Boston, MA SP Amer Automat Control Council, Int Federat Automat Control ID DIAGNOSABILITY AB Various notions of diagnosabflity reported in literature deal with uniformly bounded finite detection or counting delays. The uniformity of delays can be relaxed while delays remain finite. We introduce various notions of diagnosability allowing nonuniformly bounded finite delays. A polynomial-time verification algorithm for diagnosability with nonuniformly bounded finite indefinite-counting delays is presented. A similar technique is applied to give a computationally better verification algorithm for diagnosability with uniformly bounded finite indefinite-counting delays than algorithms previously reported in literature. Finally we develop a new on-line diagnosis algorithm that has a lower time and space complexity than on-line diagnosis algorithms reported in literature for counting the occurrence of repeated/intermittant faults. C1 Argonne Natl Lab, Syst Modeling Anal & Control Grp, Argonne, IL 60439 USA. RP Yoo, TS (reprint author), Argonne Natl Lab, Syst Modeling Anal & Control Grp, Argonne, IL 60439 USA. NR 10 TC 11 Z9 11 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0743-1619 BN 0-7803-8335-4 J9 P AMER CONTR CONF PY 2004 BP 5102 EP 5107 PG 6 WC Automation & Control Systems SC Automation & Control Systems GA BBC09 UT WOS:000224688300866 ER PT S AU Garcia, HE Yoo, TS AF Garcia, HE Yoo, TS GP acc TI A methodology for detecting routing events in discrete flow networks SO PROCEEDINGS OF THE 2004 AMERICAN CONTROL CONFERENCE, VOLS 1-6 SE Proceedings of the American Control Conference LA English DT Proceedings Paper CT American Control Conference CY JUN 30-JUL 02, 2004 CL Boston, MA SP Amer Automat Control Council, Int Federat Automat Control ID SENSOR SELECTION; SYSTEMS; DIAGNOSIS AB A theoretical framework for formulating and implementing model-based monitoring of discrete flow networks is discussed. Possible flows of items are described as the sequence of discrete-event (DE) traces. Each trace defines the DE sequence(s) that are triggered when an entity follows a given flow-path and visits tracking locations distributed within the monitored system. Given the set of possible discrete flows, a possible-behavior model -an interacting set of automatais constructed, where each automaton models the discrete flow of items at each tracking location. Event labels or symbols contain all the information required to unambiguously distinguish each discrete flow. Within the possible behavior, there is a special sub-behavior whose occurrence is required to be detected. The special behavior may be specified by the occurrence of routing events, such as faults. These intermittent or non-persistent events may occur repeatedly. An observation mask is then defined, characterizing the actual observation configuration available for collecting item tracking data. The analysis task is then to determine whether this observation configuration is capable of detecting the identified special behavior. The assessment is accomplished by evaluating several observability notions, such as detectability and diagnosability. If the corresponding property is satisfied, associated formal observers are constructed to perform the monitoring task at hand. The synthesis of an optimal observation mask may also be conducted to suggest an appropriate observation configuration guaranteeing the detection of the special events and to construct associated monitoring agents. The proposed framework, modeling methodology, and supporting techniques for discrete flow networks monitoring are presented and illustrated with an example. C1 Argonne Natl Lab, Syst Modeling Anal & Control Grp, Argonne, IL 60439 USA. RP Argonne Natl Lab, Syst Modeling Anal & Control Grp, Argonne, IL 60439 USA. EM garcia@anlw.anl.gov; tyoo@anlw.anl.gov NR 11 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 0743-1619 BN 0-7803-8335-4 J9 P AMER CONTR CONF PY 2004 BP 5665 EP 5670 PG 6 WC Automation & Control Systems SC Automation & Control Systems GA BBC09 UT WOS:000224688300962 ER PT B AU Tompkins, GH Kornreich, DE Parker, RY Koehler, AC Gonzales-Lujan, JM Burnside, RJ AF Tompkins, GH Kornreich, DE Parker, RY Koehler, AC Gonzales-Lujan, JM Burnside, RJ BE Ingalls, RG Rossetti, MD Smith, JS Peters, BA TI Dynamic radiation dose visualization in discrete-event nuclear facility simulation models SO PROCEEDINGS OF THE 2004 WINTER SIMULATION CONFERENCE, VOLS 1 AND 2 LA English DT Proceedings Paper CT Winter Simulation Conference 2004 CY DEC 05-08, 2004 CL Washington, DC SP Amer Stat Assoc, ACM SIGSIM, IEEE, Comp soc, IEEE, SMC, IIE, Inst Operat Res & Management Sci, Coll Simulat, Natl Inst Standards & Technol, Soc Modeling & Simulat Int AB To improve its process modeling capabilities, Los Alamos has worked toward integrating dose modeling tools with advanced discrete-event simulation tools. To date, dose information for a model was preprocessed and then incorporated Into a process model. In this paper, we describe a quantum improvement in our capabilities by linking a dose calculation kernel to the discrete-event modeling environment through the customizable routine capabilities provided by the Flexsim(TM) code. The Flexsim(TM) model uses ray-tracing routines to calculate the source and detector locations and determines the materials, thickness, and order of any shields between the source and detector. With this information, the lose calculation kernel is then able to calculate, in a post-processing setting, the associated dose. Thus, we are able to determine the time-varying and integrated exposure of workers to ionizing radiation, which will be integral to planning for future nuclear facilities in the DOE complex. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Tompkins, GH (reprint author), Los Alamos Natl Lab, POB 1663,MS F609, 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 0-7803-8786-4 PY 2004 BP 1541 EP 1547 PG 7 WC Computer Science, Interdisciplinary Applications; Operations Research & Management Science; Mathematics, Applied SC Computer Science; Operations Research & Management Science; Mathematics GA BBO57 UT WOS:000226725600200 ER PT S AU Qi, JY AF Qi, JY GP ieee TI Optimization of a pet scanner design for prostate lesion detection SO PROCEEDINGS OF THE 26TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-7 SE PROCEEDINGS OF ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY LA English DT Proceedings Paper CT 26th Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society CY SEP 01-05, 2004 CL San Francisco, CA SP IEEE Engn Med & Biol Soc, Whitaker Fdn, Cyberonics, NIH, NIBIB, NIDOCD, NINDS AB The recent development of new prostate tracers has motivated us to build a low cost PET camera optimized to image the prostate. Coincidence imaging of positron emitters is achieved using a pair of curved detector banks. In this paper, we optimize the design of septa in the prostate camera for detecting prostate tumors. The performance of the system is measured using a prewhitening observer with a background-known-statistically task. The results show that the septa design has a large impact on lesion detection. At the background activity level of 0.1 muCi/cc, a novel septa design with 8-crystal spacing outperforms the traditional two-dimension (inter-plane septa) and three-dimension (septaless) designs. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Nucl Med & Funct Imaging, Berkeley, CA 94720 USA. RP Qi, JY (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Dept Nucl Med & Funct Imaging, Berkeley, CA 94720 USA. RI Qi, Jinyi/A-1768-2010 OI Qi, Jinyi/0000-0002-5428-0322 NR 6 TC 0 Z9 0 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1094-687X BN 0-7803-8439-3 J9 P ANN INT IEEE EMBS PY 2004 VL 26 BP 1357 EP 1360 PN 1-7 PG 4 WC Computer Science, Interdisciplinary Applications; Engineering, Multidisciplinary; Engineering, Biomedical; Medicine, Research & Experimental; Neurosciences; Radiology, Nuclear Medicine & Medical Imaging SC Computer Science; Engineering; Research & Experimental Medicine; Neurosciences & Neurology; Radiology, Nuclear Medicine & Medical Imaging GA BBG76 UT WOS:000225461800350 ER PT S AU Fernandez-Gonzalez, R de Solorzano, CO AF Fernandez-Gonzalez, R de Solorzano, CO GP ieee TI A tool for the quantitative spatial analysis of mammary gland epithelium SO PROCEEDINGS OF THE 26TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-7 SE PROCEEDINGS OF ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY LA English DT Proceedings Paper CT 26th Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society CY SEP 01-05, 2004 CL San Francisco, CA SP IEEE Engn Med & Biol Soc, Whitaker Fdn, Cyberonics, NIH, NIBIB, NIDOCD, NINDS DE mammary gland; quantitative; spatial distribution AB In this paper we present a method for the spatial analysis of complex cellular systems based on a multiscale study of neighborhood relationships. A function to measure those relationships, M, is introduced. The refined Relative Neighborhood Graph is then presented as a method to establish vicinity relationships within layered cellular structures, and particularized to epithelial cell nuclei in the mammary gland. Finally, the method is illustrated with two examples that show interactions within one population of epithelial cells and between two different populations. C1 Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. RP Fernandez-Gonzalez, R (reprint author), Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. RI Ortiz de Solorzano, Carlos/G-3278-2010 OI Ortiz de Solorzano, Carlos/0000-0001-8720-0205 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 SN 1094-687X BN 0-7803-8439-3 J9 P ANN INT IEEE EMBS PY 2004 VL 26 BP 1549 EP 1552 PN 1-7 PG 4 WC Computer Science, Interdisciplinary Applications; Engineering, Multidisciplinary; Engineering, Biomedical; Medicine, Research & Experimental; Neurosciences; Radiology, Nuclear Medicine & Medical Imaging SC Computer Science; Engineering; Research & Experimental Medicine; Neurosciences & Neurology; Radiology, Nuclear Medicine & Medical Imaging GA BBG76 UT WOS:000225461800399 ER PT S AU Ericson, MN Wilson, MA Cote, GL Britton, CL Xu, W Baba, JS Bobrek, M Hileman, MS Moore, MR Frank, SS AF Ericson, MN Wilson, MA Cote, GL Britton, CL Xu, W Baba, JS Bobrek, M Hileman, MS Moore, MR Frank, SS GP ieee TI Development of an Implantable oximetry-based organ perfusion sensor SO PROCEEDINGS OF THE 26TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-7 SE PROCEEDINGS OF ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY LA English DT Proceedings Paper CT 26th Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society CY SEP 01-05, 2004 CL San Francisco, CA SP IEEE Engn Med & Biol Soc, Whitaker Fdn, Cyberonics, NIH, NIBIB, NIDOCD, NINDS DE implant; perfusion sensor; oximetry; organ transplantation; data telemetry ID LIVER-TRANSPLANTATION; PULSE OXIMETRY AB A sensor system enabling real-time monitoring of organ perfusion following transplantation is presented. This system uses a three wavelength oximetry-based approach. The instrument is intended for implantation at the organ site during transplantation to provide real-time reporting of the perfusion status of the tissue for 7-10 days following the procedure. Data is transmitted from the sensor to a localized receiver using direct sequence spread spectrum techniques at 916 MHz. In this paper, the sensing method and associated electronics implementation are presented. The present status of system miniaturization is summarized along with plans for future miniaturization efforts. Preliminary sensor data is presented demonstrating the efficacy of the technique. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Ericson, MN (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. NR 10 TC 4 Z9 4 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1094-687X BN 0-7803-8439-3 J9 P ANN INT IEEE EMBS PY 2004 VL 26 BP 2235 EP 2238 PN 1-7 PG 4 WC Computer Science, Interdisciplinary Applications; Engineering, Multidisciplinary; Engineering, Biomedical; Medicine, Research & Experimental; Neurosciences; Radiology, Nuclear Medicine & Medical Imaging SC Computer Science; Engineering; Research & Experimental Medicine; Neurosciences & Neurology; Radiology, Nuclear Medicine & Medical Imaging GA BBG76 UT WOS:000225461800577 ER PT S AU Grodzinski, P Liu, R Yang, J Ward, MD AF Grodzinski, P Liu, R Yang, J Ward, MD GP ieee TI Microfluidic system integration in sample preparation chip-sets - a summary SO PROCEEDINGS OF THE 26TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-7 SE PROCEEDINGS OF ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY LA English DT Proceedings Paper CT 26th Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society CY SEP 01-05, 2004 CL San Francisco, CA SP IEEE Engn Med & Biol Soc, Whitaker Fdn, Cyberonics, NIH, NIBIB, NIDOCD, NINDS DE microfluidic system integration; fluidic interfaces; sample preparation AB An increasing complexity of microfluidic chips and systems used for biochemical assay applications calls for the development of new strategies towards their functionality integration in order to achieve optimum assay performance. In this paper, approaches to an integration of microfluidic chips into diagnostic fluidic systems are reviewed with the emphasis on the selection of assay application, integration scheme, interfacing, and fabrication platform. In particular, we discuss a system containing polymer microfluidic chip-sets capable of cell pre-concentration from a complex sample matrix using immunomagnetic separations. C1 Los Alamos Natl Lab, Biosci Div, Los Alamos, NM 87545 USA. RP Grodzinski, P (reprint author), Los Alamos Natl Lab, Biosci Div, MS J586, Los Alamos, NM 87545 USA. NR 11 TC 5 Z9 5 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1094-687X BN 0-7803-8439-3 J9 P ANN INT IEEE EMBS PY 2004 VL 26 BP 2615 EP 2618 PN 1-7 PG 4 WC Computer Science, Interdisciplinary Applications; Engineering, Multidisciplinary; Engineering, Biomedical; Medicine, Research & Experimental; Neurosciences; Radiology, Nuclear Medicine & Medical Imaging SC Computer Science; Engineering; Research & Experimental Medicine; Neurosciences & Neurology; Radiology, Nuclear Medicine & Medical Imaging GA BBG76 UT WOS:000225461800677 ER PT S AU Maltz, JS Budinger, TF AF Maltz, JS Budinger, TF GP ieee TI Method for the measurement of the sensitivity of vascular beds to ischemia SO PROCEEDINGS OF THE 26TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-7 SE PROCEEDINGS OF ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY LA English DT Proceedings Paper CT 26th Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society CY SEP 01-05, 2004 CL San Francisco, CA SP IEEE Engn Med & Biol Soc, Whitaker Fdn, Cyberonics, NIH, NIBIB, NIDOCD, NINDS DE ischemia; reactive hyperemia; nicotine; endothelial function; myogenic mechanisms ID NITRIC-OXIDE; NICOTINE; FOREARM AB We identify a novel performance parameter of arterial beds and propose a convenient, non-invasive method for its measurement. The parameter relates the amount of reactive hyperemic flow that ensues after blood flow occlusion to the duration of occlusion and thus may be viewed as a measure of the sensitivity of the downstream vascular bed to the level of ischemia. The measurement is performed by inducing three successive progressively longer periods of ischemia in a limb using a pneumatic cuff. During the periods between occlusions, reactive hyperemic flow is measured at a finger using laser Doppler fluximetry (LDF). Total hyperemic response is calculated for each occlusion by averaging the LDF time series over the interocclusion interval. The vascular sensitivity parameter is calculated as the gradient of the line fit to the three mean response measurements. We evaluate the method in 18 subjects and find that orally administered nicotine significantly reduces the sensitivity to ischemia by 34%. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Dept Funct Imaging, Berkeley, CA 94720 USA. RP Maltz, JS (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Dept Funct Imaging, Berkeley, CA 94720 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 SN 1094-687X BN 0-7803-8439-3 J9 P ANN INT IEEE EMBS PY 2004 VL 26 BP 3723 EP 3726 PN 1-7 PG 4 WC Computer Science, Interdisciplinary Applications; Engineering, Multidisciplinary; Engineering, Biomedical; Medicine, Research & Experimental; Neurosciences; Radiology, Nuclear Medicine & Medical Imaging SC Computer Science; Engineering; Research & Experimental Medicine; Neurosciences & Neurology; Radiology, Nuclear Medicine & Medical Imaging GA BBG76 UT WOS:000225461800971 ER PT S AU Deschamps, T Schwartz, P Trebotich, D AF Deschamps, T Schwartz, P Trebotich, D GP ieee TI Air-flow simulation in realistic models of the trachea SO PROCEEDINGS OF THE 26TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-7 SE PROCEEDINGS OF ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY LA English DT Proceedings Paper CT 26th Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society CY SEP 01-05, 2004 CL San Francisco, CA SP IEEE Engn Med & Biol Soc, Whitaker Fdn, Cyberonics, NIH, NIBIB, NIDOCD, NINDS DE air-flow; segmentation; level-sets; fast-marching; Navier-Stokes equations; projection methods; embedded boundary methods ID EMBEDDED BOUNDARY METHOD; EQUATION AB In this article we present preliminary results from a new technique for flow simulation in realistic anatomical airways. The airways are extracted by means of Level-Sets methods that accurately model the complex and varying surfaces of anatomical objects. The surfaces obtained are defined at the sub-pixel level where they intersect the Cartesian grid of the image domain. It is therefore straightforward to construct embedded boundary representations of these objects on the same grid, for which recent work has enabled discretization of the Navier-Stokes equations for incompressible fluids. While most classical techniques require construction of a structured mesh that approximates the surface in order to extrapolate a 3D finite-element griding of the whole volume, our method directly simulates the air-flow inside the extracted surface without losing any complicated details and without building additional grids. C1 Lawrence Berkeley Natl Lab, Dept Math, Berkeley, CA USA. RP Deschamps, T (reprint author), Lawrence Berkeley Natl Lab, Dept Math, Berkeley, CA USA. NR 10 TC 1 Z9 1 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1094-687X BN 0-7803-8439-3 J9 P ANN INT IEEE EMBS PY 2004 VL 26 BP 3933 EP 3936 PN 1-7 PG 4 WC Computer Science, Interdisciplinary Applications; Engineering, Multidisciplinary; Engineering, Biomedical; Medicine, Research & Experimental; Neurosciences; Radiology, Nuclear Medicine & Medical Imaging SC Computer Science; Engineering; Research & Experimental Medicine; Neurosciences & Neurology; Radiology, Nuclear Medicine & Medical Imaging GA BBG76 UT WOS:000225461801025 ER PT S AU Hereld, M Stevens, RL van Drongelen, W Lee, HC AF Hereld, M Stevens, RL van Drongelen, W Lee, HC GP ieee TI Developing a petascale neural simulation SO PROCEEDINGS OF THE 26TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-7 SE PROCEEDINGS OF ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY LA English DT Proceedings Paper CT 26th Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society CY SEP 01-05, 2004 CL San Francisco, CA SP IEEE Engn Med & Biol Soc, Whitaker Fdn, Cyberonics, NIH, NIBIB, NIDOCD, NINDS DE simulation; neural modeling; neocortex; high performance computing; epilepsy ID NETWORKS AB Simulations of large neural networks have the potential to contribute uniquely to the study of epilepsy, from the effects of extremely local changes in neuron environment and behavior, to the effects of large scale wiring anomalies. Currently, simulations with sufficient detail in the neuron model, however, are limited to cell counts that are far smaller than scales measured by typical probes. Furthermore, it is likely that future simulations will follow the path that large-scale simulations in other fields have and include hierarchically interacting components covering different scales and different biophysics. The resources needed for problem solving in this domain call for petascale computing - computing with supercomputers capable of 10(15) operations a second and holding datasets of 10(15) bytes in memory. We will lay out the structure of our simulation of epileptiform electrical activity in the neocortex, describe experiments and models of its scaling behavior in large cluster supercomputers, identify tight spots in this behavior, and project the performance onto a candidate next generation computing platform. C1 Argonne Natl Lab, Futures Lab, Argonne, IL 60439 USA. RP Hereld, M (reprint author), Argonne Natl Lab, Futures Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. OI van Drongelen, Wim/0000-0001-8950-5424; Hereld, Mark/0000-0002-0268-2880 NR 6 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1094-687X BN 0-7803-8439-3 J9 P ANN INT IEEE EMBS PY 2004 VL 26 BP 3999 EP 4002 PN 1-7 PG 4 WC Computer Science, Interdisciplinary Applications; Engineering, Multidisciplinary; Engineering, Biomedical; Medicine, Research & Experimental; Neurosciences; Radiology, Nuclear Medicine & Medical Imaging SC Computer Science; Engineering; Research & Experimental Medicine; Neurosciences & Neurology; Radiology, Nuclear Medicine & Medical Imaging GA BBG76 UT WOS:000225461801043 ER PT S AU Chuang, F AF Chuang, F GP ieee TI Center for biophotonics science and technology (CBST) SO PROCEEDINGS OF THE 26TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOLS 1-7 SE PROCEEDINGS OF ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY LA English DT Proceedings Paper CT 26th Annual International Conference of the IEEE-Engineering-in-Medicine-and-Biology-Society CY SEP 01-05, 2004 CL San Francisco, CA SP IEEE Engn Med & Biol Soc, Whitaker Fdn, Cyberonics, NIH, NIBIB, NIDOCD, NINDS DE optics; NSF center; biochemistry C1 Lawrence Livermore Natl Lab, Ctr Biophoton Sci & Technol, Livermore, CA 94550 USA. RP Chuang, F (reprint author), Lawrence Livermore Natl Lab, Ctr Biophoton Sci & Technol, Livermore, CA 94550 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 SN 1094-687X BN 0-7803-8439-3 J9 P ANN INT IEEE EMBS PY 2004 VL 26 BP 5123 EP 5123 PN 1-7 PG 1 WC Computer Science, Interdisciplinary Applications; Engineering, Multidisciplinary; Engineering, Biomedical; Medicine, Research & Experimental; Neurosciences; Radiology, Nuclear Medicine & Medical Imaging SC Computer Science; Engineering; Research & Experimental Medicine; Neurosciences & Neurology; Radiology, Nuclear Medicine & Medical Imaging GA BBG76 UT WOS:000225461801344 ER PT B AU Reinovsky, RE AF Reinovsky, RE GP IEEE TI Pulsed power hydrodynamics: Applying pulsed power and high magnetic fields to produce extreme conditions SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc C1 Los Alamos Natl Lab, Pulsed Power Hydrodynam Program Off, Los Alamos, NM 87545 USA. RP Reinovsky, RE (reprint author), Los Alamos Natl Lab, Pulsed Power Hydrodynam Program Off, MS D420, 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 0-7803-8586-1 PY 2004 BP 5 EP 5 PG 1 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100002 ER PT B AU VanDevender, JP AF VanDevender, JP GP IEEE TI Progress in pulsed power sciences at sandia national laboratories SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP VanDevender, JP (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 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 0-7803-8586-1 PY 2004 BP 7 EP 7 PG 1 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100004 ER PT B AU Sampayan, SE Caporaso, GJ Nunnally, WC Sanders, DM Watson, JA Krogh, ML Anderson, HU AF Sampayan, SE Caporaso, GJ Nunnally, WC Sanders, DM Watson, JA Krogh, ML Anderson, HU GP IEEE TI High gradient multilayer insulator technology SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc ID SURFACE FLASHOVER; VACUUM AB We are investigating a novel insulator concept that involves the use of alternating layers of conductors and insulators with periods less than 1 mm. These structures perform 1.5 to 4 times better than conventional insulators in long pulse, short pulse, and alternating polarity applications. We have surveyed our ongoing studies by investigating the performance under long pulse electron beam, short pulse, and full reversing conditions. C1 Lawrence Livermore Natl Lab, Beam Res Program, Livermore, CA 94551 USA. RP Sampayan, SE (reprint author), Lawrence Livermore Natl Lab, Beam Res Program, POB 808, Livermore, CA 94551 USA. NR 14 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-8586-1 PY 2004 BP 46 EP 49 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100014 ER PT B AU Gai, W Power, JG Konecny, R Jing, C Liu, W Yusof, ZM Gold, SH Kinkead, AK AF Gai, W Power, JG Konecny, R Jing, C Liu, W Yusof, ZM Gold, SH Kinkead, AK GP IEEE TI High power RF testing of dielectric loaded accelerating structures SO PROCEEDINGS OF THE 26TH INTERNATIONAL POWER MODULATOR SYMPOSIUM AND 2004 HIGH VOLTAGE WORKSHOP, CONFERENCE RECORD LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc ID WAKE-FIELD AB A joint Argonne National Laboratory/Naval Research Laboratory program is under way to investigate X-band dielectric-loaded accelerating (DLA) structures, using high-power 11.424-GHz radiation from the NRL Magnicon Facility. DLA structures offer the potential of a simple, inexpensive alternative to copper disk-loaded structures for use in high-gradient rf linear accelerators. The purpose of the high-power tests is to find the rf breakdown limits of these structures and to test their ability to produce high accelerating gradients. We have recently tested two different dielectric tubes, one with alumina and another with MgCaTi liners. For alumina, we have shown no evidence of rf breakdown at up to 5 MW drive power (equivalent to 8 MV/m accelerating gradient). However, multipactor effect was found to absorb an increasing fraction of the incident microwave power, as the power level was increased, ultimately absorbing half of the incident power. Detailed experimental results and solutions for curing the multipactor will be discussed. We will also report on the most recent test results of MgCaTi dielectric tubes. C1 Argonne Natl Lab, High Energy Phys Div, Argonne, IL 60439 USA. RP Gai, W (reprint author), Argonne Natl Lab, High Energy Phys Div, 9700 S Cass Ave, Argonne, IL 60439 USA. EM wg@hep.anl.gov NR 14 TC 0 Z9 0 U1 1 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-8586-1 PY 2004 BP 50 EP 53 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100015 ER PT B AU Savage, ME Stygar, WA Elizondo, JM Ives, HC Shoup, W Struve, KW McDaniel, DH AF Savage, ME Stygar, WA Elizondo, JM Ives, HC Shoup, W Struve, KW McDaniel, DH GP IEEE TI Effect of self-magnetic field on large pulsed insulators operated at 4 megavolts and 5 megaamperes SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc ID FLASHOVER AB Experiments on a large, high voltage pulsed insulator will be described. The goal was investigation of the effect of the self-magnetic field associated with current flow toward the load, on the insulator voltage bold-off capability. In principle, the self-magnetic field could improve insulator hold-off by deflecting electrons away from the insulator surface. However, it appears that no controlled experiments have been done to measure the effect of magnetic flashover-inhibition (MFI) on a 45-degree insulator. Most modem insulator stacks, including the one used here, have the insulators at 45 degrees to the power flow direction, often with reduced electric field at the cathode triple point. Results from the experiments presented in this paper do not show a significant beneficial effect from current flow in this situation. This paper will also show calculations on the effect of magnetic field on electrons emitted from the capacitively-coupled grading rings in the insulator stack. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Savage, ME (reprint author), Sandia Natl Labs, POB 5800,Mailstop 1194, Albuquerque, NM 87185 USA. NR 17 TC 1 Z9 1 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-8586-1 PY 2004 BP 54 EP 59 PG 6 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100016 ER PT B AU Dobert, S AF Dobert, S GP IEEE TI RF breakdown in high frequency accelerators SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc AB RF breakdown in high-frequency accelerators appears to limit the maximum achievable gradient as well as the reliability of such devices. Experimental results from high power tests, obtained mostly in the framework of the NLC/GLC project at 11 GHz and from the CLIC study at 30 GHz, will be used to illustrate the important issues. The dependence of the breakdown phenomena on rf pulse length, operating frequency and fabrication material will be described. Since reliability is extremely important for large scale accelerators such as a linear collider, the measurements of breakdown rate as a function of the operating gradient will be highlighted. C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RP Dobert, S (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. NR 13 TC 2 Z9 2 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-8586-1 PY 2004 BP 60 EP 63 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100017 ER PT B AU Butler, P Delnick, F Ripple, R Peterkin, F AF Butler, P Delnick, F Ripple, R Peterkin, F GP IEEE TI Assessment of rechargeable batteries for high power applications SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc AB This paper describes an assessment of a variety of battery technologies for high pulse power applications. Sandia National Laboratories (SNL) is performing the assessment activities in collaboration with NSWC-Dahlgren. After an initial study of specifications and manufacturers' data, the assessment team identified the following electrochemistries as promising for detailed evaluation: lead-acid (Pb-acid), nickel/metal hydride (Ni/MH), nickel/cadmium (Ni/Cd), and a recently released high power lithium-Ion (Li-ion) technology. In the first three technology cases, test cells were obtained from at least two and in some instances several companies that specialize in the respective electrochemistry. In the case of the Li-ion technology, cells from a single company and are being tested. All cells were characterized in Sandia's battery test labs. After several characterization tests, the Pb-acid technology was identified as a backup technology for the demanding power levels of these tests. The other technologies showed varying degrees of promise. Following additional cell testing, the assessment team determined that the Ni/MH technology was suitable for scale-up and acquired 50-V Ni/MH modules from two suppliers for testing. Additional tests are underway to better characterize the Ni/Cd and the Li-ion technologies as well. This paper will present the testing methodology and results from these assessment activities. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Butler, P (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 0 TC 0 Z9 0 U1 1 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-8586-1 PY 2004 BP 102 EP 105 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100028 ER PT B AU Lehr, JM Bloomquist, DD Corley, JP Drennan, SA Guthrie, DW Harjes, HC Hodge, KC Johnson, DL Maenchen, JE McDaniel, DH Struve, KW AF Lehr, JM Bloomquist, DD Corley, JP Drennan, SA Guthrie, DW Harjes, HC Hodge, KC Johnson, DL Maenchen, JE McDaniel, DH Struve, KW GP IEEE TI Satpro: The system assessment test program for Zr SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc AB In the mid-90's, breakthroughs were achieved at Sandia with z-pincbes for high energy density physics on the Saturn machine. These initial tests led to the modification of the PBFA II machine to provide high currents rather than the high voltage it was initially designed for. The success of z-pinch for high energy density physics experiments insured a new mission for the converted accelerator, known as Z since 1997. Z now provides a unique capability to a number of basic science communities and has expanded its mission to include radiation effects research, inertial confinement fusion and material properties research. To achieve continued success, the physics community has requested higher peak current, better precision and pulse shaping versatility be incorporated into the refurbishment of the Z machine, known as ZR. In addition to the performance specification for ZR of a peak current of 26 MA with an implosion time of 100 ns, the machine also has a reliability specification to achieve 400 shots per year. While changes to the basic architecture of the Z machine are minor, the vast majority of its components have been redesigned. Moreover the increase in peak current from its present 18 MA to ZR's peak current of 26 MA at nominal operating parameters requires significantly higher voltages. These higher voltages, along with the reliability requirement, mandate a system assessment be performed to insure the requirements have been met. This paper will describe the System Assessment Test Program (SATPro) for the ZR project and report on the results. C1 Sandia Natl Labs, Albuquerque, NM USA. RP Lehr, JM (reprint author), Sandia Natl Labs, POB 5800,MS 1193, Albuquerque, NM USA. NR 0 TC 1 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-8586-1 PY 2004 BP 106 EP 110 PG 5 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100029 ER PT B AU Lockner, TR Kaye, RJ Turman, BN AF Lockner, TR Kaye, RJ Turman, BN GP IEEE TI Coilgun technology, status, applications, and future directions at Sandia National Laboratories SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc AB Sandia National Laboratories has been developing coilgun electromagnetic launcher technology since 1980 and is continuing to advance the technology through hardware development, industry collaboration, and pursuit of new applications. Past projects have included a 35 stage, 200 0, 50 mm launcher accelerating a 0.23 kg mass to 1 km./s velocity, a 6 stage, 280 kJ, 140 mm system accelerating a 5 kg mass to 335 m/s, and several studies documenting the potential capabilities of coilgun technology for low and high-speed applications. Projects are currently underway that will continue to advance the technology. One such program is testing high field coils to determine if previous designs can withstand the stress of large numbers of shots. This project is also developing a 30 Tesla coil to allow operation at repetition rates necessary for many applications. At the conclusion of this project we will have valuable engineering data on long-term coil reliability for high velocity applications. We are also working with an industry partner to develop a low-velocity, high-mass electromagnetic launcher for missile launch applications. Through a Cooperative Research and Development Agreement, we have constructed a small-scale model, conducted full-scale conceptual designs, and are proceeding to construct a facility for testing full-scale coils and EM effects on missile components. We are developing a coilgun launcher for DoD mortar applications that require launch velocities of similar to 400 m/s of 120 mm, 18 kg payloads, and will extend the weapon's range 40% beyond existing technology while providing significantly improved accuracy with slight modification to the existing rounds. For the mortar application, the program is designed to build both rail and coil systems to identify the strengths and weaknesses of each, and which is most appropriate for the DoD requirements. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Lockner, TR (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 5 TC 2 Z9 4 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-8586-1 PY 2004 BP 119 EP 121 PG 3 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100032 ER PT B AU Aubuchon, MS Lockner, TR Kaye, RJ Turman, BN AF Aubuchon, MS Lockner, TR Kaye, RJ Turman, BN GP IEEE TI Study of coilgun performance and comments on powered armatures SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc ID RECONNECTION LAUNCHER; DESIGN AB Electromagnetic launch technology is being developed at Sandia National Laboratories (SNL) for applications such as high-speed transit, military defense, and space vehicle launching. A lumped-parameter circuit simulation code called Slingshot was developed by SNL to simulate launcher performance [1]. This sofware calculates self and position-dependent mutual inductances, and temperature-dependent resistances to determine the electrical circuit response self-consistently with the equations of motion for the projectile. The software was designed to simulate high velocity projectile applications where an inductively driven armature was desirable. The armature is modeled as series RL circuit to represent a conductive single-turn loop or a coil winding and did not include any sources. However under some circumstances, such as lower velocity designs for missile launchers, a powered projectile may have some advantages. Such coils could be powered by a small onboard capacitor bank, batteries, or through an external supply. This paper will discuss the operation and some of the design parameters for a general coil gun as well as the circumstances under which a powered armature is desirable. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Aubuchon, MS (reprint author), Sandia Natl Labs, POB 5800 MS-1182, Albuquerque, NM 87185 USA. NR 5 TC 4 Z9 5 U1 0 U2 2 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-8586-1 PY 2004 BP 141 EP 144 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100038 ER PT B AU Reass, WA Bradley, JT Hardek, TL Kwon, SI Lynch, MT Rees, DE AF Reass, WA Bradley, JT Hardek, TL Kwon, SI Lynch, MT Rees, DE GP IEEE TI Capabilities, performance, and future possibilities of high frequency polyphase resonant converters SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc AB High Frequency (P) under bar olyphase (R) under bar esonant (P) under bar ower (C) under bar onditioning (PRPC) techniques developed at (L) under bar os (A) under bar lamos (N) under bar ational (L) under bar aboratory (LANL) are now being utilized for the Oak Ridge National Laboratory (ORNL) Spallation Neutron Source (SNS) accelerator klystron RF amplifier power systems. Three different styles of polyphase resonant converter modulators were developed for the SNS application. The various systems operate up to 140 kV, or I I MW pulses, or up to 1.1 MW average power, all from a DC input of +/- 1.2 kV. Component improvements realized with the SNS effort coupled with new applied engineering techniques have resulted in dramatic changes in RF power conditioning topology. As an example, the high-voltage transformers are less than 1% the size and weight of equivalent 60 Hz versions. With resonant conversion techniques, load protective networks are not required. A shorted load detunes the resonance and little power transfer can occur. This provides for power conditioning systems that are inherently self-protective, with automatic fault "ride-through" capabilities. By altering the Los Alamos design, higher power and CW power conditioning systems can be realized without further demands of the individual component voltage or current capabilities. This has led to designs that can accommodate 30 MW long pulse applications and megawatt class CW systems with high efficiencies. The same PRPC techniques can also be utilized for lower average power systems (similar to 250 kW). This permits the use of significantly higher frequency conversion techniques that result in extremely compact systems with shorter pulse (10 to 100 us) capabilities. These lower power PRPC systems may be suitable for medical Linacs and mobile RF systems. This paper will briefly review the performance achieved for the SNS accelerator and examine designs for high efficiency megawatt class CW systems and 30 MW peak power applications. The devices and designs for compact higher frequency converters utilized for shorter pulse, lower average power applications will also 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 0-7803-8586-1 PY 2004 BP 234 EP 237 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100062 ER PT B AU Kotlyar, Y Eng, W Pai, C Sandberg, J Tuozzolo, J Zhang, W AF Kotlyar, Y Eng, W Pai, C Sandberg, J Tuozzolo, J Zhang, W GP IEEE TI Principle design of 300 KHZ MECO RF kicker bipolar solid state modulator SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc AB A high speed, high repetition rate, bipolar solid-state high voltage modulator is under development at Brookhaven National Laboratory for Muon Electron Conversion (MECO) Experiment. The modulator will be used to drive a RF kicker consisting of a pair of parallel deflecting plates. The principle design is based on the inductive-adder topology. This system requires a fast pulse rise and fall time of approximately 20ns, a pulse width of 100ns, a pulse repetition rate of 300 kHz, and a 60 kHz sinewave amplitude modulation. Fast high voltage MOSFETs are used as main switching devices. Different magnetic materials are being investigated for the adder core magnets. The main circuit design, critical subsystems, and major technical issues will be discussed. The circuit simulation, component selection and evaluation, and preliminary test results will be presented. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Kotlyar, Y (reprint author), Brookhaven Natl Lab, Upton, NY 11973 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 0-7803-8586-1 PY 2004 BP 250 EP 253 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100067 ER PT B AU Cassel, RL deLamar, JE Nguyen, MN Pappas, GC Cook, EG Brooksby, CA AF Cassel, RL deLamar, JE Nguyen, MN Pappas, GC Cook, EG Brooksby, CA GP IEEE TI The prototype SLAC solid state induction modulator performance SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc AB The Next Linear Collider (NLC) accelerator proposal at Stanford Linear Accelerator Center (SLAC) requires a high efficiency, highly reliable, and low cost pulsed power modulator to drive the X band klystrons. The present NLC RF compression technique needed a modulator to drive 4 Klystrons at 400kV, 1300A for 1.6 mu S at 60 PPS (> 500 megawatt pulse, 80kW average). A prototype NLC solid-state induction modulator was modified to drive this new klystron array. The prototype induction modulator utilizes a three-turn secondary with 76 single "fraction turn" primary to produce the 400kV pulse. The design, testing and operational experience will be discussed. C1 Stanford Linear Accelerator Ctr, Palo Alto, CA USA. RP Cassel, RL (reprint author), Stanford Linear Accelerator Ctr, Palo Alto, CA 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 0-7803-8586-1 PY 2004 BP 254 EP 256 PG 3 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100068 ER PT B AU Portillo, S Hahn, K Maenchen, J Bailey, V Johnson, DL Oliver, B Rose, D Welch, D AF Portillo, S Hahn, K Maenchen, J Bailey, V Johnson, DL Oliver, B Rose, D Welch, D GP IEEE TI Re-trapping and powerflow results of a large area diode on the high impedance RITS-3 MITL SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc AB Sandia National Laboratories is leading a research effort into understanding and designing high brightness Xray sources for radiographic purposes. Of fundamental importance to this effort is an understanding of the electron currents being delivered to the diode. This power-flow can be manipulated by a mismatching of the diode load to the accelerator, forcing a rejoining of some sheath current into bound current. This is then a different accelerator point, achieved by increasing the diode current while minimally impacting the voltage. This paper presents results of this re-trapping of electrons on a high impedance Magnetically Insulated Transmission Line with a Large Area Diode on RITS-3. The mismatching of the diode to the accelerator was accomplished by varying the cathode-converter gap from 6 to 16 cm in 2 cm increments. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Portillo, S (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 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 0-7803-8586-1 PY 2004 BP 274 EP 277 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100074 ER PT B AU Earley, LM Brown, RW Carlson, RL Ferguson, P Haynes, WB Kirbie, HC Russell, SJ Sigler, FE Smirnova, EI Wheat, RM AF Earley, LM Brown, RW Carlson, RL Ferguson, P Haynes, WB Kirbie, HC Russell, SJ Sigler, FE Smirnova, EI Wheat, RM GP IEEE TI A 120kV IGBT modulator for driving a pierce electron gun SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc AB An IGBT modulator has been developed to drive a 120 W, 23 A Pierce electron gun. The modulator is capable of producing pulses up to 10 mu s in width at repetition rates up to 10Hz with no active reset. The pulse rise time on the electron gun will be approximately 2 mu s and the remaining 8 mu s of flattop is tuned to have a ripple of less than I percent rms. The modulator technology was developed from a previous 50 kV prototype. The modulator consists of six boards, each with one EUPEC IGBT that drives a single common step-up transformer wound on METGLAS 2605SC cores. The six transformer cores share a common bifilar output secondary winding. The modulator uses a fiber optic trigger system and has a high voltage cable output with an epoxy receptacle on the oil end and a ceramic receptacle on the vacuum end. The 120kV electron gun was manufactured by MDS Co. and will be used to generate sheet electron beams from the standard pencil beam produced by the Pierce electron gun. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Earley, LM (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. NR 10 TC 3 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-8586-1 PY 2004 BP 285 EP 288 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100077 ER PT B AU Zhang, W Roser, T Sandberg, J Tan, Y Welleman, A Stephenson, K AF Zhang, W Roser, T Sandberg, J Tan, Y Welleman, A Stephenson, K GP IEEE TI An engineering solution to the RHIC beam abort kicker upgrade SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc AB The Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory is the world largest superconducting accelerator for nuclear energy research. Particle beams traveling in opposite directions in two accelerator rings, Blue and Yellow, collide at six interaction regions to create phenomena of the early universe. There are more than 1700 superconducting magnets and very sophisticated and delicate large detectors inside the RHIC tunnel. With high beam intensity and ultra high beam energy, an inadvertent loss of beam can result severe damage to the superconducting magnets and detectors. Beam abort kickers are used to remove beam safely from the ring. The large inductive load, high current capability, short beam gap, and high reliability are the challenging issues of this system design. With high intensity and high momentum beam operation, it is desirable to have all high voltage modulators located outside of RHIC tunnel. However, to generate 22 kA output current per modulator with fast rise time, a conventional low impedance PFN and matched transmission cable design can push the operation voltage easily into 100 kV range. The large quantity of high voltage pulse transmission cables required by conventional design is another difficult issue. Therefore, the existing system has all ten high voltage modulators located inside RHIC tunnel. More than a hundred plastic packaged mineral oil filled high voltage capacitors raise serious concerns of fire and smoking threats. Other issues, such as kicker misfire, device availability in the future, and inaccessibility during operation, also demand an engineering solution for the future upgrade. In this paper, we investigate an unconventional approach to meet the technical challenges of RHIC beam abort system. The proposed design has all modulators outside of the RHIC tunnel. It will transmit output pulse through high voltage cables. The modulators will utilize solid-state switches, and operate at a maximum voltage in 30 to 50 kV range. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Zhang, W (reprint author), Brookhaven Natl Lab, Upton, NY 11973 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 0-7803-8586-1 PY 2004 BP 413 EP 416 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100111 ER PT B AU Terechkine, Y Solyak, N Shiltsev, V Saewert, G Pfeffer, H AF Terechkine, Y Solyak, N Shiltsev, V Saewert, G Pfeffer, H GP IEEE TI Pulser for the tevatron electron lens gun SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc AB To compensate for beam-beam interaction in Tevatron, an "electron lens" is considered to be an effective instrument. When a bunch of electrons with energy in the range (10-16) kV is overlapping with a bunch of antiprotons, the resulting focusing force for antiprotons can be adjusted by changing the electron beam current and by profiling its radial distribution. There exist several scenarios of how the system must function. According to one of them, an electron gun that supplies electrons must be fed by voltage pulses that follow with the frequency of antiproton bunches circulating in the Tevatron, which is about 2.5 MHz. To provide focusing tailored for each individual antiproton bunch, a modulator of the gun (pulser) must allow pulse-to-pulse voltage change. This report covers main approaches to development of a pulser for use with the gun of the Tevatron Electron Lens. C1 Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. RP Terechkine, Y (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 0-7803-8586-1 PY 2004 BP 417 EP 420 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100112 ER PT B AU Puetz, E Portillo, S Hahn, K Molina, I Cordova, S Maenchen, J Johnson, DL Gignac, R Wilkins, F AF Puetz, E Portillo, S Hahn, K Molina, I Cordova, S Maenchen, J Johnson, DL Gignac, R Wilkins, F GP IEEE TI RITS-3 self-break water switch maintenance SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc AB The Radiographic Integrated Test Stand (RITS-3) is a 5-MV, 160-kA, 70-ns Inductive Voltage Adder accelerator at Sandia National Laboratories used to develop critical understanding of x-ray sources and flash radiographic drivers. On RITS-3 three pulse forming lines (PFLs) are used to drive three inductive voltage adder cavities. Each PFL contains a fast-pulse-charged, self-breakdown annular water switch that is used for initial pulse shaping and timing. Low loss in the switches combined with good synchronization is required for efficient operation of the accelerator. Switch msaintenance is closely monitored over time to determine the effects of wear on switch breakdown performance. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Puetz, E (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 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 0-7803-8586-1 PY 2004 BP 421 EP 423 PG 3 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100113 ER PT B AU Hahn, K Maenchen, JE Cordova, S Molina, I Portillo, S Rovang, D Schamiloglu, E Welch, DR Oliver, BV Rose, DV AF Hahn, K Maenchen, JE Cordova, S Molina, I Portillo, S Rovang, D Schamiloglu, E Welch, DR Oliver, BV Rose, DV GP IEEE TI Plasma-filled focusing cell for radiographic paraxial diodes on RITS SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc AB Paraxial diodes have been a stronghold for high-brightness, flash x-ray radiography. In its traditional configuration, an electron beam impinges onto an anode foil, entering a gas-filled transport cell. Within the cell, the beam is focused into a small spot onto a high-Z target to generate x-rays for the radiographic utility. Simulations using Lsp, a particle-in-cell code, have shown that within the gas-filled focusing cell the electron beam spot location sweeps axially during the course of the beam pulse. The result is a larger radiographic spot than is desirable. Lsp has also shown that replacing the gas-filled cell with a fully ionized plasma on the order of 10(16) cm(-3) will prevent the spot from significant beam sweeping, thus resulting in a smaller, more stable radiographic spot size. Sandia National Laboratories (SNL) is developing a plasma-filled focusing cell for future paraxial diode experiments. A z-discharge in a hydrogen fill is used to generate a uniform, highly ionized plasma. Laser interferometry is the key diagnostic to determine electron density in a light lab setting and during future paraxial diode shots on SNL's RITS-3 accelerator. A time-resolved spot diagnostic will also be implemented during diode shots to measure the change in spot size during the course of the pulse. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Hahn, K (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 9 TC 0 Z9 0 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-8586-1 PY 2004 BP 429 EP 432 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100115 ER PT B AU Cassel, RL AF Cassel, RL GP IEEE TI A 95kV klystron power supply crowbar using light triggered SCR SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc AB The Stanford Linear Accelerator Center B-Factory accelerator requires the use ten 1.2 MW RF klystron operating at a voltage between 80 and 95 kV. The protection of the klystron against self-arcs is extremely important for the power supply. Although the unique design of the power supplies limits the fault current under klystron fault a light triggered thyristor crowbar is also incorporated. The unique characteristics of the light trigged thyristor make it ideal for the crowbar application. The paper discusses the design of the crowbar SCR stack and its performance. In addition, the design of a light trigged thyristor stack for phase control on the 12.5kV line regulation will be covered. C1 Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Cassel, RL (reprint author), Stanford Linear Accelerator Ctr, Stanford, CA 94309 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 0-7803-8586-1 PY 2004 BP 478 EP 480 PG 3 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100128 ER PT B AU Dale, GE Kirbie, HC Doss, JD Serrano, MA AF Dale, GE Kirbie, HC Doss, JD Serrano, MA GP IEEE TI Solid-state Marx modulator development SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc AB A solid-state Marx modulator is under development to supply regulated voltage and current to a high-power magnetron. A primary goal of this design is for the modulator to have low volume and low weight. The modulator is required to provide 5-mu s-wide rectangular pulses of approximately 45 kV and 145 A at a repetition frequency of 120 Hz. The Marx is composed of 12 circuit boards, with 4 IGBT switched Marx stages per board, for a total of 48 stages. The IGBT Marx switches can be closed and then opened at full-load current, allowing the production of a rectangular pulse from a Marx generator. Single boards and three-board stacks have been tested into a resistive load at operational voltages and currents. Results of the resistive load test are shown. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Dale, GE (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI Dale, Gregory/A-9419-2009 NR 6 TC 0 Z9 1 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-8586-1 PY 2004 BP 497 EP 500 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100133 ER PT B AU Smith, DL Savage, ME Ziska, GR Starbird, RL AF Smith, DL Savage, ME Ziska, GR Starbird, RL GP IEEE TI ZR Marx capacitor lifetime test results SO Proceedings of the 26th International Power Modulator Symposium and 2004 High Voltage Workshop, Conference Record LA English DT Proceedings Paper CT 26th International Power Modulator Symposium/High Voltage Workshop CY MAY 23-26, 2004 CL San Francisco, CA SP IEEE Dielect & Elect Insulat Soc, IEEE Electron Devices Soc AB The ZR upgrade to the Z machine at Sandia National Labs (SNL) has a total output current requirement of at least 26 MA for a 100-ns standard z-pinch load. To accomplish this with minimal impact on the surrounding hardware, the existing Marx generator capacitors must be replaced with identical size units with twice the capacitance. Before the 2005 six-month shut down and transition from Z to ZR occurs, 2500 of these capacitors will be delivered. This paper summarizes the results of our lifetime testing of the selected General Atomics P/N 32896 11x14x25-inch, Scyllac-style insulator bushing, 2.65-mu F, 100-kV, 30-nH, 35% reversal capacitor. We have completed lifetime tests with twelve capacitors at 100 kV and with fourteen capacitors at 110-kV charge voltage. The means of the fitted Weibull distributions for these two cases are about 17,000 and 10,000 shots, respectively. As a result of this effort plus the rigorous vendor testing prior to shipping, we are confident in the high reliability of these capacitors and have acquired information pertaining to their lifetime dependence on the operating voltage. One result of the analysis is that for these capacitors lifetime scales inversely with voltage to the 6.28 +/- 0.9 power, over this 100 to 110-kV voltage range. Accepting the assumptions leading to this outcome allows us to predict the overall ZR system Marx generator reliability at the expected lower operating voltages of about 85 to 90 kV. C1 Sandia Natl Labs, Dept 1639, Albuquerque, NM 87185 USA. RP Smith, DL (reprint author), Sandia Natl Labs, Dept 1639, POB 5800, Albuquerque, NM 87185 USA. NR 5 TC 2 Z9 3 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-8586-1 PY 2004 BP 530 EP 533 PG 4 WC Energy & Fuels; Engineering, Electrical & Electronic SC Energy & Fuels; Engineering GA BBZ41 UT WOS:000228358100142 ER PT S AU Shaneyfelt, MR Tangyunyong, P Hill, TA Soden, JA Flores, RS Schwank, JR Dodd, PE Hash, GL AF Shaneyfelt, MR Tangyunyong, P Hill, TA Soden, JA Flores, RS Schwank, JR Dodd, PE Hash, GL BE Sharp, R Fletcher, K TI Identification of radiation-induced parasitic leakage paths using light emission microscopy SO PROCEEDINGS OF THE 7TH EUROPEAN CONFERENCE ON RADIATION AND ITS EFFECTS ON COMPONENTS AND SYSTEMS SE ESA SPECIAL PUBLICATIONS LA English DT Proceedings Paper CT 7th European Conference on Radiation and Its Effects on Components and Systems CY SEP 15-19, 2003 CL Noordwijk, NETHERLANDS SP European Space Agcy DE light emission microscopy; integrated circuit reliability; integrated circuit testing; radiation effects; radiation hardening (electronics); radiation response; total dose ID INTEGRATED-CIRCUITS AB Eliminating radiation-induced parasitic leakage paths in integrated circuits (ICs) is key to improving their total dose hardness. Semiconductor manufacturers can use a combination of design and/or process techniques to eliminate known radiation-induced parasitic leakage paths. However, unknown or critical radiation-induced parasitic leakage may still exist on fully processed ICs and it is extremely difficult (if not impossible) to identify these leakage paths based on radiation induced parametric degradation. We show that light emission microscopy can be used to identify the location of radiation-induced parasitic leakage paths in ICs. This is illustrated by using light emission microscopy to find radiation-induced parasitic leakage paths in partially-depleted SOI SRAMs. Once leakage paths were identified, modifications were made to the SRAM design to improve the total dose radiation hardness of the SRAMs. Light emission microscopy should prove to be an important tool for the development of future radiation hardened technologies and devices. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Shaneyfelt, MR (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 8 TC 0 Z9 0 U1 0 U2 0 PU ESA PUBLICATIONS DIVISION C/O ESTEC PI 2200 AG NOORDWIJK PA PO BOX 299, 2200 AG NOORDWIJK, NETHERLANDS SN 0379-6566 BN 92-9092-846-8 J9 ESA SP PUBL PY 2004 VL 536 BP 113 EP 117 PG 5 WC Engineering, Aerospace; Engineering, Electrical & Electronic; Nuclear Science & Technology SC Engineering; Nuclear Science & Technology GA BBQ26 UT WOS:000227039100019 ER PT B AU Cole-McLaughlin, K Pascucci, V AF Cole-McLaughlin, K Pascucci, V BE Villaneuva, JJ TI Multi-resolution representation of topology SO PROCEEDINGS OF THE FOURTH IASTED INTERNATIONAL CONFERENCE ON VISUALIZATION, IMAGING, AND IMAGE PROCESSING LA English DT Proceedings Paper CT 4th IASTED International Conference on Visualization, Imaging, and Image Processing CY SEP 06-08, 2004 CL Marbella, SPAIN SP Int Assoc Sci & Technol Dev, World Modelling Simulat Forum AB The Contour Tree of a scalar field is the graph obtained by contracting, all the connected components of the level sets of the field into points. This is a powerful abstraction for representing the structure of the field with explicit description of the topolocrical changes of its level sets. It has proven effective as a data-structure for fast extraction of isosurfaces and its application has been advocated as a user interface component guiding interactive data exploration sessions. We propose a new metaphor for visualizing the Contour Tree borrowed from the classical design of a mechanical orrery - see Figure I (a) - reproducing a hierarchy of orbits of the planets around the sun or moons around a planet. In the toporrery - see Figure 1(b) - the hierarchy of stars, planets and moons is replaced with a hierarchy of maxima, minima and saddles that can be interactively filtered, both uniformly and adaptively, by importance with respect to a given metric. C1 Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA USA. RP Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA USA. NR 22 TC 0 Z9 0 U1 0 U2 0 PU ACTA PRESS PI CALGARY PA B6, STE 101, 2509 DIEPPE AVE SW, CALGARY, ALBERTA T3E 7J9, CANADA BN 0-88986-454-3 PY 2004 BP 182 EP 189 PG 8 WC Computer Science, Artificial Intelligence; Computer Science, Software Engineering; Imaging Science & Photographic Technology SC Computer Science; Imaging Science & Photographic Technology GA BCC31 UT WOS:000228556600032 ER PT B AU Gioiosa, R Petrini, F Davis, K Lebaillif-Delamare, F AF Gioiosa, R Petrini, F Davis, K Lebaillif-Delamare, F GP IEEE TI Analysis of system overhead on parallel computers SO Proceedings of the Fourth IEEE International Symposium on Signal Processing and Information Technology LA English DT Proceedings Paper CT 4th IEEE International Symposium on Signal Processing and Information Technology CY DEC 08-21, 2004 CL Rome, ITALY DE parallel computing; operating system noise; linux; performance evaluation; clusters of workstations AB Ever-increasing demand for computing capability is driving the construction of ever-larger computer clusters, typically comprising commodity compute nodes, ranging in size up to thousands of processors, with each node hosting an instance of the operating system (OS). Recent studies [1, 4] have shown that even minimal intrusion by the OS on user applications, e.g. a slowdown of user processes of less than 1.0% on each OS instance, can result in a dramatic performance degradation-50% or more-when the user applications are executed on thousands of processors. The contribution of this paper is the explication, and demonstration by way of a case study, of a methodology for analyzing and evaluating the impact of the system (all software and hardware other than user applications) activity on application performance. Our methodology has three major components: 1) a set of simple benchmarks to quickly measure and identify the impact of intrusive system events; 2) a kernel-level profiling tool Oprofile to characterize all relevant events and their sources; and, 3) a kernel module that provides timing information for in-depth modeling of the frequency and duration of each relevant event and determines which sources have the greatest impact on performance (and are therefore the most important to eliminate). The paper provides a collection of experimental results conducted on a state-of-the-art dual AMD Opteron cluster running GNU/Linux 2.6.5. While our work has been performed on this specific OS, we argue that our contribution readily generalizes to other open source and commercial operating systems. C1 Los Alamos Natl Lab, Comp & Computat Sci Div, Performance & Architecture Lab, Los Alamos, NM 87545 USA. RP Gioiosa, R (reprint author), Los Alamos Natl Lab, Comp & Computat Sci Div, Performance & Architecture Lab, POB 1663, Los Alamos, NM 87545 USA. NR 4 TC 3 Z9 4 U1 0 U2 1 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-8689-2 PY 2004 BP 387 EP 390 DI 10.1109/ISSPIT.2004.1433800 PG 4 WC Computer Science, Artificial Intelligence; Computer Science, Information Systems; Computer Science, Software Engineering; Telecommunications SC Computer Science; Telecommunications GA BCA97 UT WOS:000228482900091 ER PT B AU Park, BH Ostrouchov, G Samatova, NF Geist, A AF Park, BH Ostrouchov, G Samatova, NF Geist, A BE Berry, MW Dayal, U Kamath, C Skillicorn, D TI Reservoir-based random sampling with replacement from data stream SO Proceedings of the Fourth SIAM International Conference on Data Mining SE SIAM PROCEEDINGS SERIES LA English DT Proceedings Paper CT 4th SIAM International Conference on Data Mining CY APR 22-24, 2004 CL Lake Buena Vista, FL SP Soc Ind & Appl Math DE data stream mining; random sampling; reservoir sampling; probabilistic method AB Random sampling is a widely accepted basis for estimation from large data sets that outstrip available computer memory. When the data comes as a stream, its total size is potentially infinite and usually only one pass through the data is possible. Reservoir sampling is a method of maintaining a fixed size random sample from streaming data. All reservoir schemes that have been introduced in the past are random sampling without replacement; no duplicates are allowed in a sample. This paper introduces a new method for reservoir sampling with replacement. We first prove that the proposed method indeed maintains a random sample with replacement at any given time. Then we introduce a refined version that significantly speeds up the overall sampling procedure. C1 Oak Ridge Natl Lab, Comp Sci & Math Div, Oak Ridge, TN 37831 USA. RP Park, BH (reprint author), Oak Ridge Natl Lab, Comp Sci & Math Div, POB 2008, Oak Ridge, TN 37831 USA. NR 12 TC 3 Z9 3 U1 0 U2 0 PU SIAM PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA BN 0-89871-568-7 J9 SIAM PROC S PY 2004 BP 492 EP 496 PG 5 WC Computer Science, Artificial Intelligence SC Computer Science GA BCR65 UT WOS:000230948400053 ER PT B AU Ding, C He, XF AF Ding, C He, XF BE Berry, MW Dayal, U Kamath, C Skillicorn, D TI Principal component analysis and effective K-means clustering SO Proceedings of the Fourth SIAM International Conference on Data Mining SE SIAM PROCEEDINGS SERIES LA English DT Proceedings Paper CT 4th SIAM International Conference on Data Mining CY APR 22-24, 2004 CL Lake Buena Vista, FL SP Soc Ind & Appl Math AB The widely adopted K-means clustering algorithm uses a sum of squared error objective function. A detailed analysis shows the close relationship between K-means clustering and principal component analysis (PCA) which is extensively utilized in unsupervised dimension reduction. We prove that the continuous solutions of the discrete K-means clustering membership indicators are the data projections on the principal directions (principal eigenvectors of the covariance matrix). New lower bounds for K-means objective function are derived, which relate directly to the eigenvalues of the covariance matrix. Experiments on Internet newsgroups indicate that the new bounds are within 0.5-1.5% of the optimal values, and that PCA provides an effective solution for the K-means clustering. C1 Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Ding, C (reprint author), Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. NR 6 TC 3 Z9 3 U1 0 U2 3 PU SIAM PI PHILADELPHIA PA 3600 UNIV CITY SCIENCE CENTER, PHILADELPHIA, PA 19104-2688 USA BN 0-89871-568-7 J9 SIAM PROC S PY 2004 BP 497 EP 501 PG 5 WC Computer Science, Artificial Intelligence SC Computer Science GA BCR65 UT WOS:000230948400054 ER PT B AU Wu, MS Kendall, RA Aluru, S AF Wu, MS Kendall, RA Aluru, S BE Hamza, MH TI A tunable collective communication framework on a cluster of SMPS SO Proceedings of the IASTED International Conference on Parallel and Distributed Computing and Networks LA English DT Proceedings Paper CT IASTED International Conference on Parallel and Distributed Computing and Networks CY FEB 17-19, 2004 CL Innsbruck, AUSTRIA SP IASTED DE cluster computing; collective communications; MPI; shared memory operations; tunable libraries AB In this paper we investigate a tunable MPI collective communications library on a cluster of SMPs. Most tunable collective communications libraries select optimal algorithms for inter-node communication on a given platform. We add another layer of intra-node communications composed by several tunable shared memory operations. We explore the advantages of our approach, and discuss when to use our approach, when to switch to another approach on the shared memory layer. Experimental results indicate that collective communications designed by such an approach with proper tuning can outperform vendor implementations. C1 Iowa State Univ, SCL,US DOE, Ames Lab, Dept Elect & Comp Engn, Ames, IA 50011 USA. RP Wu, MS (reprint author), Iowa State Univ, SCL,US DOE, Ames Lab, Dept Elect & Comp Engn, Ames, IA 50011 USA. NR 19 TC 0 Z9 0 U1 0 U2 0 PU ACTA PRESS PI CALGARY PA B6, STE 101, 2509 DIEPPE AVE SW, CALGARY, ALBERTA T3E 7J9, CANADA BN 0-88986-369-5 PY 2004 BP 56 EP 63 PG 8 WC Computer Science, Theory & Methods SC Computer Science GA BCB01 UT WOS:000228483300010 ER PT S AU Chorpening, BT Tucker, D Maley, SM AF Chorpening, BT Tucker, D Maley, SM BE Rocha, D Sarro, PM Vellekoop, MJ TI Sensors applications in 21st century fossil-fuel based power generation SO PROCEEDINGS OF THE IEEE SENSORS 2004, VOLS 1-3 SE IEEE Sensors LA English DT Proceedings Paper CT IEEE Sensors 2004 Conference CY OCT 24-27, 2004 CL Vienna Univ Technol, Vienna, AUSTRIA SP IEEE HO Vienna Univ Technol DE sensors; power generation; fossil fuel; harsh environment ID SYSTEMS AB The primary mission of the National Energy Technology Laboratory (NETL) is to assure U.S. fossil energy resources can meet increasing demand for affordable energy without compromising the quality of life for future generations of Americans. In this mission, NETL has historically focused on the development of advanced technologies as part of or in support of larger programs, such as the Clean Coal Power Initiative, FutureGen, the Solid State Energy Conversion Alliance (SECA), and the Turbines program. Power generation research at NETL covers many areas, including coal and oil gasification and gas cleanup, turbine combustion, high temperature fuel cells, internal combustion engines for stationary power, and hybrid fuel-cell turbine power systems. Advancement in these areas either requires or would benefit from advances in sensor technology for harsh environments. This presentation will discuss opportunities for sensors in modern fossil-fuel based power generation, challenges posed by the operating environments, and summarize research at NETL on a sensor for in-situ monitoring of gas turbine combustors. C1 US DOE, Natl Energy Technol Lab, Washington, DC 20585 USA. RP Chorpening, BT (reprint author), US DOE, Natl Energy Technol Lab, Washington, DC 20585 USA. EM benjamin.chorpening@netl.doe.gov; david.tucker@netl.doe.gov; susan.maley@netl.doe.gov NR 16 TC 1 Z9 1 U1 0 U2 3 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA SN 1930-0395 BN 0-7803-8692-2 J9 IEEE SENSOR PY 2004 BP 1153 EP 1156 DI 10.1109/ICSENS.2004.1426381 PG 4 WC Engineering, Multidisciplinary; Instruments & Instrumentation SC Engineering; Instruments & Instrumentation GA BCH15 UT WOS:000229268100298 ER PT B AU Keahey, K Papka, ME Peng, Q Schissel, D Abla, G Araki, T Burruss, J Feibush, E Lane, P Klasky, S Leggett, T McCune, D Randerson, L AF Keahey, K Papka, ME Peng, Q Schissel, D Abla, G Araki, T Burruss, J Feibush, E Lane, P Klasky, S Leggett, T McCune, D Randerson, L GP ieee computer society TI Grids for experimental science: The virtual control room SO PROCEEDINGS OF THE SECOND INTERNATIONAL WORKSHOP ON CHALLENGES OF LARGE APPLICATIONS IN DISTRIBUTED ENVIRONMENTS LA English DT Proceedings Paper CT 2nd International Workshop on Challenges of Large Applications in Distributed Environments (CLADE 2004) CY JUN 07, 2004 CL Honolulu, HI SP IEEE, US DOE, Off Sci, Natl Sci Fdn, Agronne Natl Lab AB The National Fusion Collaboratory focuses on enabling fusion scientists to explore Grid capabilities in support of experimental science. Fusion experiments are structured as a series of plasma pulses initiated roughly every 20 minutes. In the between-pulse intervals scientists perform data analysis and discuss results to reach decisions affecting changes to the next plasma pulse. This interaction can be made more efficient by performing more analysis and engaging more expertise from a geographically distributed team of scientists and resources. In this paper, we describe a virtual control room experiment that unites collaborative, visualization, and Grid technologies to provide such environment and shows how their combined effect can advance experimental science. We also report on FusionGrid services whose use during the fusion experimental cycle became possible for the first time thanks to this technology. We also describe the Access Grid, experimental data presentation tools, and agreement-based resource management and workflow systems enabling time-bounded end-to-end application execution. The first virtual control room experiment represented a mock-up of a remote interaction with the DIII-D control room and was presented at SC03 and later reviewed at an international ITER Grid Workshop. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Keahey, K (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 20 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 0-7695-2115-0 PY 2004 BP 4 EP 11 DI 10.1109/CLADE.2004.1309087 PG 8 WC Computer Science, Theory & Methods SC Computer Science GA BAK02 UT WOS:000222621100002 ER PT B AU Myers, JD Allison, TC Bittner, S Didier, B Frenklach, M Green, WH Ho, YL Hewson, J Koegler, W Lansing, C Leahy, D Lee, M McCoy, R Minkoff, M Nijsure, S von Laszewski, G Montoya, D Pancerella, C Pinzon, R Pitz, W Rahn, LA Ruscic, B Schuchardt, K Stephan, E Wagner, A Windus, T Yang, C AF Myers, JD Allison, TC Bittner, S Didier, B Frenklach, M Green, WH Ho, YL Hewson, J Koegler, W Lansing, C Leahy, D Lee, M McCoy, R Minkoff, M Nijsure, S von Laszewski, G Montoya, D Pancerella, C Pinzon, R Pitz, W Rahn, LA Ruscic, B Schuchardt, K Stephan, E Wagner, A Windus, T Yang, C GP ieee computer society TI A collaborative Informatics infrastructure for multi-scale science SO PROCEEDINGS OF THE SECOND INTERNATIONAL WORKSHOP ON CHALLENGES OF LARGE APPLICATIONS IN DISTRIBUTED ENVIRONMENTS LA English DT Proceedings Paper CT 2nd International Workshop on Challenges of Large Applications in Distributed Environments (CLADE 2004) CY JUN 07, 2004 CL Honolulu, HI SP IEEE, US DOE, Off Sci, Natl Sci Fdn, Agronne Natl Lab AB The Collaboratory for Multi-scale Chemical Science (CMCS) is developing a powerful informatics-based approach to synthesizing multi-scale information to support a systems-based research approach and is applying it in support of combustion research. An open source multi-scale informatics toolkit is being developed that addresses a number of issues core to the emerging concept of knowledge grids including provenance tracking and lightweight federation of data and application resources into cross-scale information flows. The CMCS portal is currently in use by a number of high-profile pilot groups and is playing a significant role in enabling their efforts to improve and extend community maintained chemical reference information. C1 Sandia Natl Labs, Livermore, CA 94551 USA. RP Myers, JD (reprint author), Sandia Natl Labs, Livermore, CA 94551 USA. RI Ruscic, Branko/A-8716-2008; von Laszewski, Gregor/C-2808-2012; OI Ruscic, Branko/0000-0002-4372-6990; von Laszewski, Gregor/0000-0001-9558-179X; Stephan, Eric/0000-0002-8155-6806; Myers, James/0000-0001-8462-650X; Green, William/0000-0003-2603-9694 NR 19 TC 3 Z9 3 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 0-7695-2115-0 PY 2004 BP 24 EP 33 DI 10.1109/CLADE.2004.1309089 PG 10 WC Computer Science, Theory & Methods SC Computer Science GA BAK02 UT WOS:000222621100004 ER PT B AU Senecal, JG Duchaineau, MA Joy, KI AF Senecal, JG Duchaineau, MA Joy, KI BE Hamza, MH TI Reversible n-bit to n-bit integer Haar-like transforms SO PROCEEDINGS OF THE SEVENTH IASTED INTERNATIONAL CONFERENCE ON COMPUTER GRAPHICS AND IMAGING LA English DT Proceedings Paper CT 7th IASTED International Conference on Computer Graphics and Imaging CY AUG 17-19, 2004 CL Kauai, HI SP Int Assoc Sci & Technol Dev DE image processing; fixed-width transforms; wavelets; image compression AB We introduce TLHaar, an n-bit to n-bit reversible transform similar to the S-transform. TLHaar uses lookup tables that approximate the S-transform, but reorder the coefficients so they fit into n bits. TLHaar is suited for loss-less compression in fixed-width channels, such as digital video channels and graphics hardware frame buffers. Tests indicate that when the incoming image data has lines or hard edges TLHaar coefficients compress better than S-transform coefficients. For other types of image data TLHaar coefficients compress up to 2.5% worse than those of the S-transform, depending on the data and the compression method used. C1 Lawrence Livermore Natl Lab, Inst Sci Comp Res, Livermore, CA USA. RP Lawrence Livermore Natl Lab, Inst Sci Comp Res, Livermore, CA USA. EM senecal1@llnl.gov; duchaine@llnl.gov; kijoy@ucdavis.edu NR 5 TC 0 Z9 0 U1 0 U2 0 PU ACTA PRESS PI CALGARY PA B6, STE 101, 2509 DIEPPE AVE SW, CALGARY, ALBERTA T3E 7J9, CANADA BN 0-88986-418-7 PY 2004 BP 135 EP 140 PG 6 WC Computer Science, Artificial Intelligence; Computer Science, Software Engineering; Imaging Science & Photographic Technology SC Computer Science; Imaging Science & Photographic Technology GA BCB51 UT WOS:000228521000022 ER PT B AU Rieger, C Naidu, DS AF Rieger, C Naidu, DS BE Hamza, MH TI New techniques for implementing linear quadratic methods with aerospace and other industrial control applications SO Proceedings of the Sixth IASTED International Conference on Intelligent Systems and Control LA English DT Proceedings Paper CT 6th IASTED International Conference on Intelligent Systems and Control CY AUG 23-25, 2004 CL Honolulu, HI SP Int Assoc Sci & Technol Dev, Tech Comm Control, Tech Comm Intelligent Syst & Control DE optimal; tracking; LQT; LQR; industrial control AB The optimal control design for the linear quadratic regulator (LQR) and linear quadratic tracking (LQT) is well known. However, techniques have not been developed that allow the general solution of the LQR and LQT problems to various plants for unsteady-state conditions. This paper revisits these methods and develops MATLAB-based algorithms based on analytical solutions of the matrix Riccati differential equations arising in LQR and LQT methods. It provides an effective control technique for aerospace and other industrial control applications with time-varying set points. To demonstrate, simulations on the use of these techniques are illustrated for two typical applications arising in aerospace and heating, ventilation and air-conditioning (HVAC). It is believed that the implementation techniques developed in this paper serve as an effective tool for optimal design of a variety of problems in industry. C1 Idaho Natl Engn & Envirom Lab, Idaho Falls, ID 83415 USA. RP Rieger, C (reprint author), Idaho Natl Engn & Envirom Lab, POB 1625, Idaho Falls, ID 83415 USA. NR 9 TC 1 Z9 1 U1 1 U2 1 PU ACTA PRESS PI CALGARY PA B6, STE 101, 2509 DIEPPE AVE SW, CALGARY, ALBERTA T3E 7J9, CANADA BN 0-88986-436-5 PY 2004 BP 388 EP 393 PG 6 WC Automation & Control Systems; Computer Science, Artificial Intelligence; Operations Research & Management Science SC Automation & Control Systems; Computer Science; Operations Research & Management Science GA BCC26 UT WOS:000228556100069 ER PT B AU Kuchar, OA Reyes-Spindola, JF Benaroch, M AF Kuchar, OA Reyes-Spindola, JF Benaroch, M BE Chan, C Kinsner, W Wang, YG Miller, DM TI Cognitive bioinformatics: Computational cognitive model for dynamic problem solving SO PROCEEDINGS OF THE THIRD IEEE INTERNATIONAL CONFERENCE ON COGNITIVE INFORMATICS LA English DT Proceedings Paper CT 3rd IEEE International Conference on Cognitive Informatics (ICCI 2004) CY AUG 16-17, 2004 CL Univ Victoria, Victoria, CANADA SP Univ Calgary, IEEE Canada, Univ Manitoba, Univ Regina, i CORE HO Univ Victoria DE cognitive model; bioinformatics; cognitive informatics; AI; computing; software engineering ID EXPRESSION PATTERNS; BIOLOGY; CANCER AB We describe a new computational cognitive model that is being developed for solving complex problems in bioinformatics. This cognitive model was developed based on observing biologists solving problems in their current environments. Bioinformatics provides several challenges to current problem-solving environments. 1) massive heterogeneous data to mine and fuse; 2) quantity of information is growing and changing on a monthly basis; 3) knowledge base is being challenged and changed as biologists learn more (this occurs on a very short schedule). This paper describes the problem domain, evolution of this new model, the model itself how this model relates to current literature, and concludes with a summary of our ongoing research efforts. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Kuchar, OA (reprint author), Pacific NW Natl Lab, POB 999,902 Battelle Blvd, Richland, WA 99352 USA. NR 20 TC 0 Z9 0 U1 1 U2 2 PU IEEE COMPUTER SOC PI LOS ALAMITOS PA 10662 LOS VAQUEROS CIRCLE, PO BOX 3014, LOS ALAMITOS, CA 90720-1264 USA BN 0-7695-2190-8 PY 2004 BP 84 EP 92 DI 10.1109/COGINF.2004.1327462 PG 9 WC Computer Science, Artificial Intelligence; Computer Science, Software Engineering; Computer Science, Theory & Methods SC Computer Science GA BAW04 UT WOS:000223861000010 ER PT B AU George, ND Vixie, KR AF George, ND Vixie, KR BE Govaerts, J Hounkonnou, MN Msezane, AZ TI Variational analysis, PDE's and image analysis: The big picture and a sampling of details SO PROCEEDINGS OF THE THIRD INTERNATIONAL WORKSHOP ON CONTEMPORARY PROBLEMS IN MATHEMATICAL PHYSICS LA English DT Proceedings Paper CT 3rd International Workshop on Contemporary Problems in Mathematical Physics CY NOV 01-07, 2003 CL Cotonou, BENIN SP Govt Republic Benin, Univ Paris Sud XI Franch, Cooperat Inter Univ Inst Dev, Univ Francophones Belges, Abdus Salam Int Ctr Theoret Phys, Int Chair Math Phys & Applicat, Univ Abomey-Calavi Republic Benin, Clark Atlanta Univ, Ctr Theoret Studies Phys SystCath, Catholic Univ Louvain, Univ Abomey-Calavi, Ctr Beninois Recherche Sci & Tech, ATC Beko, Soc Ciments Benin, Soc Etudies Realisat Ouvrages Hydraul, Int Assoc Math Phys, Off Radiodiffus Televis Benin,, Radio Natl, Inst Rech Dev, Univ AbomeyCalavi, Fac Sci Tech, Univ Abomey-Calavi, Inst Math Sci Phys, French Embassy, La Rivierae, Pt Automome Cotonou, Univ Perpignan, Hotel Pt, Sun Beach Hotel, Hotel Croix Sud AB Here we summarize an invited plenary talk in which we familiarized the community with problems of interest within image analysis and introduced researchers to some of the important tools and cutting edge developments in the analysis of image data. We explain our high level view and perspectives, show a few examples of data and techniques, and provide references for further study. Our goal is to give a feeling for the way a mathematician thinks about and uses abstract structures and geometric/analytic tools to understand and solve problems in the analysis of image data. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP George, ND (reprint author), Los Alamos Natl Lab, MS P365, Los Alamos, NM 87545 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 981-256-030-0 PY 2004 BP 480 EP 499 PG 20 WC Physics, Mathematical SC Physics GA BCL86 UT WOS:000229958800027 ER PT S AU Maksimovic, V Tolley, A Jovanovic, MT Radmilovic, V AF Maksimovic, V Tolley, A Jovanovic, MT Radmilovic, V BE Uskokovic, DP Milonjic, SK Rakovic, DI TI Aging of a commercial Al-Cu-Si based alloy modified with germanium SO PROGRESS IN ADVANCED MATERIALS AND PROCESSES SE MATERIALS SCIENCE FORUM LA English DT Article; Proceedings Paper CT 5th Conference of the Yugoslav-Materials-Research-Society (Yu-MRS 2003) CY SEP 15-19, 2003 CL Herceg Novi, YUGOSLAVIA SP Yugoslav Mat Res Soc DE aging kinetics; Al-Si-Ge-Cu; heterogeneous precipitation; Si-Ge particles ID MICROALLOYING ELEMENTS; PHASE-DECOMPOSITION; AL-(SI,GE) ALLOYS; GE-CU; PRECIPITATION; ADDITIONS AB The effect of small addition (0,7 wt.%) of Ge on precipitation during aging at 190degreesC of a modified commercial Al-Cu-Si based alloy has been studied. It was found that the maximum hardness in the alloy containing Ge was achieved three times faster than in the alloy without Ge. TEM results clearly demonstrate that the accelerated precipitation should be ascribed to a dense and fine distribution of Si-Ge particles serving as sites for heterogeneous precipitation of theta" and theta' phases. Accelerated precipitation during aging was accompanied by increase in hardness. C1 Vinca Inst Nucl Sci, Dept Mat Sci, Belgrade, Serbia Monteneg, Yugoslavia. Univ Calif Berkeley, LBNL, Natl Ctr Electron Microscopy, Berkeley, CA USA. RP Maksimovic, V (reprint author), Vinca Inst Nucl Sci, Dept Mat Sci, Belgrade, Serbia Monteneg, Yugoslavia. RI Maksimovic, Vesna/A-2026-2011; OI Maksimovic, Vesna/0000-0002-8326-4938 NR 15 TC 0 Z9 0 U1 0 U2 1 PU TRANS TECH PUBLICATIONS LTD PI ZURICH-UETIKON PA BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLAND SN 0255-5476 J9 MATER SCI FORUM PY 2004 VL 453-454 BP 323 EP 328 PG 6 WC Materials Science, Multidisciplinary SC Materials Science GA BAC47 UT WOS:000221535700054 ER PT S AU Ptak, AJ Kurtz, S Young, M Kramer, C AF Ptak, AJ Kurtz, S Young, M Kramer, C BE Friedman, DJ Manasreh, O Buyanova, IA Munkholm, A Auret, FD TI The effects of atmosphere, temperature, and bandgap on the annealing of GaInNAs for solar cell applications SO PROGRESS IN COMPOUND SEMICONDUCTOR MATERIALS III - ELECTRONIC AND OPTOELECTRONIC APPLICATIONS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Progress in Compound Semiconductor Materials III held at MRS Fall Meeting CY FEB 17, 2003 CL BOSTON, MA SP Mat Res Soc, AF Res Lab ID MOLECULAR-BEAM EPITAXY; IMPROVED LUMINESCENCE EFFICIENCY; OPTICAL-PROPERTIES; NITROGEN; GANXAS1-X; MECHANISM; ORIGIN; GANAS; GAAS AB The effects of thermal annealing on the minority-carrier diffusion lengths and depletion widths of GaInNAs are studied. We find that diffusion lengths in as-grown, Be- and Si-doped GaInNAs are limited to less than about 0.2 mum for samples with low concentrations of nitrogen. For higher concentrations of nitrogen, the diffusion lengths are not measurable. Annealing under a variety of temperatures and atmospheres typically makes the diffusion lengths even shorter. These short diffusion lengths are not yet long enough for GaInNAs to be useful in a next-generation, four-junction structure. Using undoped GaInNAs in a p-i-n structure is a promising approach to increase device performance. Currently, however, the depletion widths are too small at the bandgaps necessary for solar cells, and annealing does not appear to improve them. C1 Natl Ctr Photovolta, Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Ptak, AJ (reprint author), Natl Ctr Photovolta, Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 28 TC 2 Z9 2 U1 0 U2 3 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-737-7 J9 MATER RES SOC SYMP P PY 2004 VL 799 BP 3 EP 8 PG 6 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Optics; Physics, Condensed Matter SC Engineering; Materials Science; Optics; Physics GA BAD63 UT WOS:000221673900001 ER PT S AU Crandall, RS AF Crandall, RS BE Friedman, DJ Manasreh, O Buyanova, IA Munkholm, A Auret, FD TI Analysis of emission rate measurements in a material showing a Meyer-Neldel-rule SO PROGRESS IN COMPOUND SEMICONDUCTOR MATERIALS III - ELECTRONIC AND OPTOELECTRONIC APPLICATIONS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Progress in Compound Semiconductor Materials III held at MRS Fall Meeting CY FEB 17, 2003 CL BOSTON, MA SP Mat Res Soc, AF Res Lab ID MOLECULAR-BEAM EPITAXY; DEEP-LEVEL DEFECTS; P-TYPE; GAAS; INGAASN; SEMICONDUCTORS; ORIGIN; RECOMBINATION; SILICON; TRAPS AB This paper presents data showing a Meyer-Neldel rule (MNR) in InGaAsN alloys. It is shown that without this knowledge, significant errors can be made using Deep-Level Transient-Spectroscopy (DLTS) emission data to determine capture cross sections. The errors arise because of the neglect of significant transition entropy changes associated with multiphonon excitation of charge from deep traps. Ignoring the entropy change results in cross section values ranging over five orders-of-magnitude in InGaAsN alloys and 18 orders-of-magnitude in CuInGaSe alloys. Only by correctly accounting for the MNR and the accompanying entropy changes in analyzing the DLTS data will the correct value of the cross section be obtained. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Crandall, RS (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 30 TC 1 Z9 1 U1 0 U2 2 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-737-7 J9 MATER RES SOC SYMP P PY 2004 VL 799 BP 9 EP 17 PG 9 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Optics; Physics, Condensed Matter SC Engineering; Materials Science; Optics; Physics GA BAD63 UT WOS:000221673900002 ER PT S AU Geisz, J Olson, JM McMahon, WE Hannappel, T Jones, K Moutinho, H Al-Jassim, MM AF Geisz, J Olson, JM McMahon, WE Hannappel, T Jones, K Moutinho, H Al-Jassim, MM BE Friedman, DJ Manasreh, O Buyanova, IA Munkholm, A Auret, FD TI Growth and characterization of GaPNAs on Si SO PROGRESS IN COMPOUND SEMICONDUCTOR MATERIALS III - ELECTRONIC AND OPTOELECTRONIC APPLICATIONS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Progress in Compound Semiconductor Materials III held at MRS Fall Meeting CY FEB 17, 2003 CL BOSTON, MA SP Mat Res Soc, AF Res Lab ID CHEMICAL-VAPOR-DEPOSITION; MOCVD; GAAS; DEFECTS; ALLOYS AB The dilute nitrogen alloy GaPNAs can be lattice matched to silicon with band gaps ranging from 2.3 eV to less than 1.7eV making it of special interest for photovoltaic applications. We have studied the growth and structural quality of the alloy grown on vicinal Si(001) and GaP(001) substrates by MOCVD. Using a particular nucleation scheme, we have deposited I pin thick layers that arc crack-free and exhibit narrow x-ray line widths. The FWHM of the (004) x-ray reflection from a GaP1-xNx epilayer decreases dramatically from similar to300 arcsec for x=0 to 18 arcsec for x = 0.021. The band gap of this alloy is 1.96 eV. With the addition of As (and more N), the x-ray line widths tend to increase slightly to 27 arcsec. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Geisz, J (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 18 TC 1 Z9 1 U1 0 U2 1 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-737-7 J9 MATER RES SOC SYMP P PY 2004 VL 799 BP 27 EP 31 PG 5 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Optics; Physics, Condensed Matter SC Engineering; Materials Science; Optics; Physics GA BAD63 UT WOS:000221673900004 ER PT S AU Dashdorj, J Ahrenkiel, R Metzger, W AF Dashdorj, J Ahrenkiel, R Metzger, W BE Friedman, DJ Manasreh, O Buyanova, IA Munkholm, A Auret, FD TI Modeling of recombination lifetimes in charge-separation device structures SO PROGRESS IN COMPOUND SEMICONDUCTOR MATERIALS III - ELECTRONIC AND OPTOELECTRONIC APPLICATIONS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Progress in Compound Semiconductor Materials III held at MRS Fall Meeting CY FEB 17, 2003 CL BOSTON, MA SP Mat Res Soc, AF Res Lab AB Recombination processes in semiconductors are inhibited by charge-separation mechanisms that are produced in structures such as pn junctions. In this work, we calculated the recombination rates in Si and GaAs n(+)p junction structures by both analytical and numerical techniques. Transport effects can be divided into three physical phenomena. The first is the flow of carriers that results in the build up of a junction voltage or charge-separation. The time constant of this effect is determined by the junction dopant concentrations and the mobilities. The second is the flow of carriers due to diffusion. The time constant of this event is a function of the carrier diffusion coefficient and physical width of the absorbing medium. In most semiconductor structures, this time constant is relatively short relative to the recombination lifetime. The third effect is the discharge of the open-circuit voltage of the junction by minority carrier charge injection. A heuristic analysis of the long-term decay in this regime indicates that the decay time varies as CkT/qJ(0), where C is the junction capacitance and J(0) is the dark current. In this regime, the decay time is a function of recombination lifetime through the dependence of J(0) but the measured excess carrier decay time is often not the true recombination lifetime of the underlying materials. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Dashdorj, J (reprint author), Natl Renewable Energy Lab, 1617 Cole Blvd, Golden, CO 80401 USA. NR 4 TC 0 Z9 0 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-737-7 J9 MATER RES SOC SYMP P PY 2004 VL 799 BP 199 EP 203 PG 5 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Optics; Physics, Condensed Matter SC Engineering; Materials Science; Optics; Physics GA BAD63 UT WOS:000221673900030 ER PT S AU Ahrenkiel, RK Friedman, D Metzger, WK Page, M Dashdorj, J AF Ahrenkiel, RK Friedman, D Metzger, WK Page, M Dashdorj, J BE Friedman, DJ Manasreh, O Buyanova, IA Munkholm, A Auret, FD TI Observation of retarded recombination in charge-separation structures SO PROGRESS IN COMPOUND SEMICONDUCTOR MATERIALS III - ELECTRONIC AND OPTOELECTRONIC APPLICATIONS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Progress in Compound Semiconductor Materials III held at MRS Fall Meeting CY FEB 17, 2003 CL BOSTON, MA SP Mat Res Soc, AF Res Lab ID MINORITY-CARRIER LIFETIME; CIRCUIT VOLTAGE-DECAY; SOLAR-CELLS; SEMICONDUCTORS; BEHAVIOR AB Measurement of recombination and minority-carrier lifetimes has become a very common activity in current semiconductor technology. The two primary measurement techniques are based on photoconductive decay (PCD) and time-resolved photoluminescence (TRPL). The measurement of the "true" lifetime depends on the carriers being confined to a given spatial region of a diagnostic device. When internal electric fields exist that separate the charges, the measured value does not represent the real minority-carrier lifetime. In these cases, the measured quantity is a function of the true lifetime and the measurement technique. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Ahrenkiel, RK (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 9 TC 1 Z9 1 U1 1 U2 3 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-737-7 J9 MATER RES SOC SYMP P PY 2004 VL 799 BP 205 EP 210 PG 6 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Optics; Physics, Condensed Matter SC Engineering; Materials Science; Optics; Physics GA BAD63 UT WOS:000221673900031 ER PT B AU Doll, WE Beard, LP Gamey, TJ Bell, DT Holladay, JS AF Doll, WE Beard, LP Gamey, TJ Bell, DT Holladay, JS BE Chen, C Xia, JH TI Development of airborne magnetic and electromagnetic systems for mapping and detection of UXO and other shallow metallic objects SO PROGRESS IN ENVIRONMENTAL AND ENGINEERING GEOPHYSICS LA English DT Proceedings Paper CT International Conference on Environmental and Engineering Geophysics CY JUN 06-09, 2004 CL China Univ Geosci, Wuhan, PEOPLES R CHINA SP Changjiang Water Resources Commiss HO China Univ Geosci DE airborne technology; UXO; near-surface geophysicists AB Boom-mounted airborne magnetic and electromagnetic systems represent a significant advance in airborne technology for engineering and environmental applications. Although most surveys to date have been directed toward unexploded ordnance (UXO), the systems are appropriate for efficiently addressing a wide number of problems that are important to near-surface geophysicists. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. RP Doll, WE (reprint author), Oak Ridge Natl Lab, Oak Ridge, TN 37830 USA. NR 12 TC 0 Z9 1 U1 0 U2 0 PU SCIENCE PRESS PI MONMOUTH JUNCTION PA 2031 US HIGHWAY 130 STE F, MONMOUTH JUNCTION, NJ 08852-3014 USA BN 1-880132-97-4 PY 2004 BP 440 EP 448 PG 9 WC Geochemistry & Geophysics; Engineering, Environmental; Engineering, Geological SC Geochemistry & Geophysics; Engineering GA BAP80 UT WOS:000223170000078 ER PT J AU Gschneidner, KA Verkade, M AF Gschneidner, KA Verkade, M TI Electronic and crystal structures, size (ECS2) model for predicting binary solid solutions SO PROGRESS IN MATERIALS SCIENCE LA English DT Review AB The semi-empirical electronic and crystal structures, size (ECS2) model for predicting the extent of primary solutions is described. The similarity of electronic structures of both the solvent and solute is paramount, and if these are favorable then the size difference between the solvent and solute is the determining factor. The crystal structures of the elements are used as the surrogate of the electronic structure. Thus this model is quite simple to use since one only needs to know the crystal structures and the atomic sizes of the two elements involved. The ECS2 model is significantly better than the simple 15% Hume-Rothery size rule or the Darken-Gurry model for predicting solid solution formation (the overall reliabilities are 84.5, 70.7 and 72.4%, respectively). (C) 2003 Elsevier Ltd. All rights reserved. C1 Iowa State Univ, Ames Lab, Ames, IA 50011 USA. Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA. RP Gschneidner, KA (reprint author), Iowa State Univ, Ames Lab, Ames, IA 50011 USA. EM cagey@ameslab.gov NR 13 TC 10 Z9 10 U1 1 U2 6 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0079-6425 J9 PROG MATER SCI JI Prog. Mater. Sci. PY 2004 VL 49 IS 3-4 BP 411 EP 428 DI 10.1016/S0079-6425(03)00026-4 PG 18 WC Materials Science, Multidisciplinary SC Materials Science GA 803CT UT WOS:000220209900013 ER PT J AU Hecker, SS Harbur, DR Zocco, TG AF Hecker, SS Harbur, DR Zocco, TG TI Phase stability and phase transformations in Pu-Ga alloys SO PROGRESS IN MATERIALS SCIENCE LA English DT Review DE plutonium; Pu-Ga alloys; phase stability; phase transformations; electronic structure; instability ID ABSORPTION FINE-STRUCTURE; X-RAY-DIFFRACTION; DELTA-PU; MARTENSITIC-TRANSFORMATION; PLUTONIUM ALLOYS; PLASTIC-DEFORMATION; VOLUME COLLAPSE; LOW-TEMPERATURE; CERIUM; TRANSITION AB Plutonium is of interest because of its nuclear properties. However, it is its electronic structure and the resulting physical and chemical properties that make plutonium the most complex element in the periodic table. It exhibits six solid allotropes at ambient pressure and is notoriously unstable with temperature, pressure, chemical additions, and time. It undergoes virtually every type of phase transformation known. The addition of a few atomic percent gallium helps retain the face-centered cubic delta-phase to room temperature, avoiding transformation to a monoclinic phase with a huge volume contraction. We present previously unpublished experimental studies on phase stability and phase transformations in Pu-Ga alloys and compare these to available literature. However, we first review the physics of plutonium and the fee delta-phase to help us understand why plutonium defies conventional metallurgical wisdom. Plutonium sits near the middle of the actinide series, which marks the emergence of 5f electrons in the valence shell. Right at plutonium the 5f electrons are caught in an abrupt transition between being bonding and being localized (chemically inert). In fact, in the delta-phase they appear to be in a unique state of being neither fully bonding nor localized, which leads to novel electronic interactions and physical behavior. We compare these interactions to two other unstable elements in the periodic table, namely iron and cerium, to get a better appreciation of peculiarities of plutonium. (C) 2003 Elsevier Ltd. All rights reserved. C1 Los Alamos Natl Lab, MST DO, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, NMT 10, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, MST DO, MS G754, Los Alamos, NM 87545 USA. EM sh@lanl.gov NR 120 TC 113 Z9 113 U1 3 U2 21 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0079-6425 J9 PROG MATER SCI JI Prog. Mater. Sci. PY 2004 VL 49 IS 3-4 BP 429 EP 485 DI 10.1016/S0079-6425(03)00032-X PG 57 WC Materials Science, Multidisciplinary SC Materials Science GA 803CT UT WOS:000220209900014 ER PT J AU Lewis, EE Smith, M Na, BC AF Lewis, EE Smith, M Na, BC TI OECD/NEA benchmark on MOX-fuelled core transport calculations without spatial homogenisation - Preface SO PROGRESS IN NUCLEAR ENERGY LA English DT Editorial Material C1 Northwestern Univ, Evanston, IL 60208 USA. Argonne Natl Lab, Argonne, IL 60439 USA. OECD, Nucl Energy Agcy, Paris, France. RP Lewis, EE (reprint author), Northwestern Univ, Evanston, IL 60208 USA. RI Lewis, Elmer/B-7597-2009 NR 0 TC 0 Z9 1 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0149-1970 J9 PROG NUCL ENERG JI Prog. Nucl. Energy PY 2004 VL 45 IS 2-4 BP 105 EP 106 DI 10.1016/j.pnucene.2004.09.002 PG 2 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 873PQ UT WOS:000225293400001 ER PT J AU Smith, MA Lewis, EE Na, BC AF Smith, MA Lewis, EE Na, BC TI Benchmark on deterministic 2-D MOX fuel assembly transport calculations without spatial homogenization SO PROGRESS IN NUCLEAR ENERGY LA English DT Article DE OECD; MOX; NEA Expert Group; two-dimensional benchmark; C5G7 AB An important issue of deterministic transport methods for whole core calculations concerns the accuracy of homogenization techniques. A direct calculation for whole core heterogeneous geometries was not feasible in the past due to the limited capability of computers. With modern computational abilities, direct whole core heterogeneous calculations are becoming feasible. This paper explores a recent OECD/NEA benchmark problem proposed to test the accuracy of modern deterministic transport methods when applied to reactor core problems without spatial homogenization. For this work a two-dimensional configuration was investigated and an accurate Monte Carlo reference solution was obtained. Twenty participants submitted solutions for the two-dimensional configuration and all of the participant solutions were compared to a reference Monte Carlo solution. Overall all the results submitted by the participants agreed well with the reference solution. A majority of the participants obtained solutions that were more than acceptable for typical reactor calculations and the remaining errors in the participant solutions can be attributed to the high order space-angle approximation necessary to solve this particular benchmark problem. It is important to note that the high order space-angle approximation needed for this benchmark is not necessary typical for all such wholecore heterogeneous problems. (C) 2004 Published by Elsevier Ltd. C1 Argonne Natl Lab, Argonne, IL 60439 USA. Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA. OECD, NEA, F-92130 Issy Les Moulineaux, France. RP Smith, MA (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Lewis, Elmer/B-7597-2009 NR 8 TC 6 Z9 6 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0149-1970 J9 PROG NUCL ENERG JI Prog. Nucl. Energy PY 2004 VL 45 IS 2-4 BP 107 EP 118 DI 10.1016/j.pnuceene.2004.09.003 PG 12 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 873PQ UT WOS:000225293400002 ER PT J AU Azmy, YY Gehin, JC Orsi, R AF Azmy, YY Gehin, JC Orsi, R TI Dort solutions to the two-dimensional C5G7MOX benchmark problem SO PROGRESS IN NUCLEAR ENERGY LA English DT Article DE DORT; MOX; discrete-ordinates; benchmark; accuracy AB We present a comprehensive study of the solution error for the C5G7MOX Benchmark problem using the two-dimensional transport code DORT. We set a stringent criterion that a successful solution to the benchmark exercise must satisfy, namely that at least for some of the benchmark quantities convergence to the reference solution with computational model refinement must be demonstrated. In the present exercise this amounts to examining the evolution of the DORT solution, e.g. the multiplication factor, with increasing angular quadrature order, decreasing computational cell size, and tighter representation of the curved rod-moderator interface for all circular rods in the core model. In addition we explored the effect of angular quadrature type, comparing solution accuracy for the fully symmetric and the Square Legendre-Chebychev quadratures establishing superiority of the latter. We establish the high quality of DORT's solution to this benchmark exercise by demonstrating that the multiplication factor asymptotically approaches the reference solution as stated in our self-imposed success criterion. High accuracy of the pin power distribution is also attained, however, convergence to the reference values is not realized. We conjecture that this is due to the lack of error information in the reference values. Our results also illustrate DORT's high accuracy on reasonable meshes and quadrature orders, as well as the sufficiency of a crude, square, geometric approximation of the rod-moderator interface to achieve high accuracy. (C) 2004 Published by Elsevier Ltd. C1 Penn State Univ, University Pk, PA 16802 USA. Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. ENEA, Ctr Dati Nucl, I-40129 Bologna, Italy. RP Azmy, YY (reprint author), Penn State Univ, 229 Reber Bldg, University Pk, PA 16802 USA. EM yya3@psu.edu; gehinjc@ornl.gov; ors@bologna.enea.it RI Gehin, Jess/E-2560-2011; OI Gehin, Jess/0000-0001-8337-9551 NR 5 TC 4 Z9 4 U1 0 U2 0 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0149-1970 J9 PROG NUCL ENERG JI Prog. Nucl. Energy PY 2004 VL 45 IS 2-4 BP 215 EP 231 DI 10.1016/j.pnucene.2004.09.011 PG 17 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 873PQ UT WOS:000225293400011 ER PT J AU Smith, MA Tsoulfanidis, N Lewis, EE Palmiotti, G Taiwo, TA AF Smith, MA Tsoulfanidis, N Lewis, EE Palmiotti, G Taiwo, TA TI A finite subelement generalization of the variational nodal method SO PROGRESS IN NUCLEAR ENERGY LA English DT Article C1 Argonne Natl Lab, Argonne, IL 60439 USA. Univ Missouri, Rolla, MO 65401 USA. Northwestern Univ, Evanston, IL 60208 USA. RP Smith, MA (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Lewis, Elmer/B-7597-2009 NR 0 TC 0 Z9 0 U1 0 U2 1 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0149-1970 J9 PROG NUCL ENERG JI Prog. Nucl. Energy PY 2004 VL 45 IS 2-4 BP 265 EP 265 DI 10.1016/j.pnucene.2004.09.001 PG 1 WC Nuclear Science & Technology SC Nuclear Science & Technology GA 873PQ UT WOS:000225293400014 ER PT S AU Farley, FJM Semertzidis, YK AF Farley, FJM Semertzidis, YK BE Faessler, A TI The 47 years of muon g-2 SO PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 52, NO 1 SE Progress in Particle and Nuclear Physics LA English DT Review DE muon; magnetic moment; g-2 ID ANOMALOUS MAGNETIC-MOMENT; STORAGE-RING MAGNET; PHOTON SCATTERING CONTRIBUTION; ELECTRIC-DIPOLE MOMENT; HADRONIC CONTRIBUTIONS; PRECISION-MEASUREMENT; HYPERFINE-STRUCTURE; ELECTROMAGNETIC INTERACTIONS; ELECTROWEAK CORRECTIONS; E(+)E(-) ANNIHILATION AB After a brief introduction to the theory of the muon anomalous moment a equivalent to (g - 2)/2, all the experimental measurements of this quantity are reviewed in some detail. This includes the CERN cyclotron experiment, the first muon storage rings at CERN, the Berkeley experiment, the invention of the "magic energy" and the latest measurement with the third muon storage ring at Brookhaven. The current comparison with theory is discussed. (C) 2003 Elsevier B.V. All rights reserved. C1 Yale Univ, New Haven, CT 06520 USA. Brookhaven Natl Lab, Upton, NY 11973 USA. RP 8 Chemin St Pierre, F-06620 Le Bar Sur Loup, France. RI Semertzidis, Yannis K./N-1002-2013 NR 183 TC 14 Z9 15 U1 2 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0146-6410 J9 PROG PART NUCL PHYS PY 2004 VL 52 BP 1 EP 83 DI 10.1016/j.ppnp.2003.09.004 PG 83 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA BAB14 UT WOS:000221424000001 ER PT S AU Moretto, LG Elliott, JB Phair, L AF Moretto, LG Elliott, JB Phair, L BE Faessler, A TI From finite charged nuclei to infinite symmetric nuclear matter and its phase diagram SO PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 53, NO 1 SE PROGRESS IN PARTICLE AND NUCLEAR PHYSICS LA English DT Article; Proceedings Paper CT International School of Nuclear Physics CY SEP 16-24, 2003 CL Erice, ITALY SP Deutsch Forsch Gemeinsch, European Phys Soc, Italian Minist Educ, Italian Minist Univ & Sci Res, Sicilian Reg Govt DE multifragmentation; nuclear liquid-vapor phase transition; finite size effects ID NEGATIVE HEAT-CAPACITY; TRANSITION; BEHAVIOR; REGION AB The difficulties encountered with Coulomb and finite size effects in generalizing to the infinite system phase diagram are considered. Methods to correct for the Coulomb effect exactly and to eliminate finite size effects are described. (C) 2004 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. RP Moretto, LG (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, MS 71-259, Berkeley, CA 94720 USA. EM lgmoretto@lbl.gov NR 19 TC 3 Z9 3 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0146-6410 J9 PROG PART NUCL PHYS PY 2004 VL 53 IS 1 BP 101 EP 112 DI 10.1016/j.ppnp.2004.02.030 PG 12 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA BAM75 UT WOS:000222861900010 ER PT S AU Xu, N AF Xu, N BE Faessler, A TI Study of bulk properties at high energy nuclear collisions - the search for the partonic equation of state at RHIC SO PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 53, NO 1 SE Progress in Particle and Nuclear Physics LA English DT Review CT International School of Nuclear Physics CY SEP 16-24, 2003 CL Erice, ITALY SP Deutsch Forsch Gemeinsch, European Phys Soc, Italian Minist Educ, Italian Minist Univ & Sci Res, Sicilian Reg Govt ID HEAVY-ION COLLISIONS; LARGE TRANSVERSE-MOMENTUM; HADRON FREEZE-OUT; PB COLLISIONS; P(P)OVER-BAR COLLISIONS; FINITE-TEMPERATURE; ROOT-S(NN)=130 GEV; AU+AU COLLISIONS; COLLECTIVE FLOW; ELLIPTIC FLOW AB We discuss recent results from RHIC. Issues of energy loss and partonic collectivity from Au + Au collisions at roots (N N) = 200 GeV are the focus of this paper. We propose a path toward the understanding of the partonic equation of state in high energy nuclear collisions. Published by Elsevier B.V. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Xu, N (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, MS 70R0319,1 Cyclotron Rd, Berkeley, CA 94720 USA. EM nxu@lbl.gov NR 84 TC 14 Z9 14 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0146-6410 J9 PROG PART NUCL PHYS PY 2004 VL 53 IS 1 BP 165 EP 182 DI 10.1016/j.ppnp.2004.02.016 PG 18 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA BAM75 UT WOS:000222861900016 ER PT S AU Bratkovskaya, EL Bleicher, M Cassing, W van Leeuwen, M Reiter, M Soff, S Stocker, H Weber, H AF Bratkovskaya, EL Bleicher, M Cassing, W van Leeuwen, M Reiter, M Soff, S Stocker, H Weber, H BE Faessler, A TI Strangeness dynamics in relativistic nucleus-nucleus collisions SO PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 53, NO 1 SE Progress in Particle and Nuclear Physics LA English DT Review CT International School of Nuclear Physics CY SEP 16-24, 2003 CL Erice, ITALY SP Deutsch Forsch Gemeinsch, European Phys Soc, Italian Minist Educ, Italian Minist Univ & Sci Res, Sicilian Reg Govt DE relativistic heavy-ion collisions; particle and resonance production; Meson production; Quark gluon plasma ID HEAVY-ION COLLISIONS; PLUS AU COLLISIONS; HADRONIC OBSERVABLES; EXCITATION-FUNCTION; LAMBDA PRODUCTION; PHASE-TRANSITION; SPS ENERGIES; MATTER; MODEL; EQUATION AB We investigate hadron production as well as transverse hadron spectra in nucleus-nucleus collisions from 2 A GeV to 21.3 A TeV within two independent transport approaches (UrQMD and HSD) that are based on quark, diquark, string and hadronic degrees of freedom. The comparison to experimental data demonstrates that the two approaches agree quite well with each other and with the experimental data on hadron production. The enhancement of pion production in central Au+Au (Pb+Pb) collisions relative to scaled PP collisions (the 'kink') is well described by both approaches without involving any phase transition. However, the maximum in the K(+)/pi(+) ratio at 20 to 30 A GeV (the 'horn') is missed by similar to40%. A comparison to the transverse mass spectra from pp and C + C (or Si + Si) reactions shows the reliability of the transport models for light systems. For central Au + Au (Pb + Pb) collisions at bombarding energies above similar to5 A GeV, however, the measured K(+/-) in m(T) spectra have a larger inverse slope parameter than expected from the calculations. The approximately constant slope of the K(+/-) spectra at SPS (the 'step') is not reproduced either. Thus the pressure generated by hadronic interactions in the transport models above similar to5 A GeV is lower than observed in the experimental data. This finding suggests that the additional pressure-as expected from lattice QCD calculations at finite quark chemical potential and temperature-might be generated by strong interactions in the early pre-hadronic/partonic phase of central Au + An (Pb + Pb) collisions. (C) 2004 Elsevier B.V. All rights reserved. C1 Univ Giessen, Inst Theoret Phys, D-35392 Giessen, Germany. Goethe Univ Frankfurt, Inst Theoret Phys, D-60054 Frankfurt, Germany. NIKHEF H, NL-1009 DB Amsterdam, Netherlands. Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Cassing, W (reprint author), Univ Giessen, Inst Theoret Phys, Heinrich Buff Ring 16, D-35392 Giessen, Germany. EM wolfgang.cassing@theo.physik.uni-giessen.de RI Bleicher, Marcus/A-2758-2010; Stoecker, Horst/D-6173-2013; OI Stoecker, Horst/0000-0002-3282-3664; van Leeuwen, Marco/0000-0002-5222-4888 NR 60 TC 10 Z9 10 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0146-6410 J9 PROG PART NUCL PHYS PY 2004 VL 53 IS 1 BP 225 EP 237 DI 10.1016/j.ppnp.2004.02.015 PG 13 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA BAM75 UT WOS:000222861900021 ER PT S AU Tannenbaum, MJ AF Tannenbaum, MJ BE Faessler, A TI E-T and other event-by-event distributions from AGS to RHIC energies SO PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 53, NO 1 SE Progress in Particle and Nuclear Physics LA English DT Article; Proceedings Paper CT International School of Nuclear Physics CY SEP 16-24, 2003 CL Erice, ITALY SP Deutsch Forsch Gemeinsch, European Phys Soc, Italian Minist Educ, Italian Minist Univ & Sci Res, Sicilian Reg Govt DE ET; event-by-event ID NUCLEUS-NUCLEUS COLLISIONS; CHARGED-PARTICLE MULTIPLICITY; CENTRAL RAPIDITY REGION; TRANSVERSE ENERGY; AU COLLISIONS; MULTIPARTICLE PRODUCTION; P+A COLLISIONS; ALPHA-ALPHA; 14.5 GEV/C; EMISSION AB Event-by-event distributions in multiplicity, ET and (PT) are illustrated and techniques to understand them are discussed. (C) 2004 Elsevier B.V. All rights reserved. C1 Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Tannenbaum, MJ (reprint author), Brookhaven Natl Lab, Dept Phys, 510c, Upton, NY 11973 USA. EM mjt@bnl.gov OI Tannenbaum, Michael/0000-0002-8840-5314 NR 31 TC 6 Z9 6 U1 0 U2 0 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0146-6410 J9 PROG PART NUCL PHYS PY 2004 VL 53 IS 1 BP 239 EP 252 DI 10.1016/j.ppnp.2004.02.021 PG 14 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA BAM75 UT WOS:000222861900022 ER PT S AU Hatta, Y AF Hatta, Y BE Faessler, A TI New signature of the QCD critical point SO PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 53, NO 1 SE PROGRESS IN PARTICLE AND NUCLEAR PHYSICS LA English DT Article; Proceedings Paper CT International School of Nuclear Physics CY SEP 16-24, 2003 CL Erice, ITALY SP Deutsch Forsch Gemeinsch, European Phys Soc, Italian Minist Educ, Italian Minist Univ & Sci Res, Sicilian Reg Govt DE QCD critical point; Baryon number fluctuation AB We argue that the event-by-event fluctuation of the proton number is a meaningful and promising observable to detect the QCD critical point in heavy-ion collision experiments. (C) 2004 Elsevier B.V. All rights reserved. C1 Kyoto Univ, Dept Phys, Kyoto 6068502, Japan. RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan. Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA. RP Hatta, Y (reprint author), Kyoto Univ, Dept Phys, Kyoto 6068502, Japan. EM hatta@quark.phy.bnl.gov NR 4 TC 0 Z9 0 U1 0 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0146-6410 J9 PROG PART NUCL PHYS PY 2004 VL 53 IS 1 BP 347 EP 350 DI 10.1016/j.ppnp.2004.02.014 PG 4 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA BAM75 UT WOS:000222861900034 ER PT S AU Dean, DJ Engeland, T Hjorth-Jensen, M Kartamyshev, MP Osnes, E AF Dean, DJ Engeland, T Hjorth-Jensen, M Kartamyshev, MP Osnes, E BE Faessler, A TI Effective interactions and the nuclear shell-model SO PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 53, NO 2 SE Progress in Particle and Nuclear Physics LA English DT Review ID COUPLED-CLUSTER METHOD; NEUTRON-RICH NUCLEI; GROUND-STATE CORRELATIONS; SHORT-RANGE CORRELATIONS; FLUCTUATING ELECTRON-SYSTEMS; HOLE RING DIAGRAMS; MANY-BODY PROBLEM; HIGH-SPIN STATES; N = 20; MONTE-CARLO AB This review aims at a critical discussion of the interplay between effective interactions derived from various many-body approaches and spectroscopic data extracted from large scale shell-model studies. To achieve this, our many-body scheme starts with the free nucleon-nucleon (NN) interaction, typically modeled on various meson exchanges. The NN interaction is in turn renormalized in order to derive an effective medium dependent interaction. The latter is in turn used in shell-model calculations of selected nuclei. We also describe how to sum up the parquet class of diagrams and present initial uses of the effective interactions in coupled cluster many-body theory. (C) 2004 Elsevier B.V. All rights reserved. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Univ Oslo, Ctr Math Applicat, Oslo, Norway. Univ Oslo, Dept Phys, Oslo, Norway. RP Oak Ridge Natl Lab, Div Phys, POB 2008, Oak Ridge, TN 37831 USA. EM dean@orph01.phy.orn1.gov RI Hjorth-Jensen, Morten/B-1417-2008; OI Dean, David/0000-0002-5688-703X NR 158 TC 44 Z9 45 U1 1 U2 12 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0146-6410 J9 PROG PART NUCL PHYS PY 2004 VL 53 IS 2 BP 419 EP 500 DI 10.1016/j.ppnp.2004.05.001 PG 82 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA BBF52 UT WOS:000225237300002 ER PT S AU Jacobs, P Wang, XN AF Jacobs, P Wang, XN BE Faessler, A TI Matter in extremis: ultrarelativistic nuclear collisions at RHIC SO PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL. 54, NO 2 SE Progress in Particle and Nuclear Physics LA English DT Review DE quantum chromodynamics; quark-gluon plasma; relativistic heavy ion collider ID HEAVY-ION COLLISIONS; QUARK-GLUON-PLASMA; CHARGED-PARTICLE MULTIPLICITY; PARTON ENERGY-LOSS; HIGH-DENSITY QCD; GEV PB-208+PB-208 COLLISIONS; PLUS AU COLLISIONS; ART. NO. 034903; ELLIPTIC FLOW; HADRON-PRODUCTION AB We review the physics of nuclear matter at high energy density and the experimental search for the quark-gluon plasma at the Relativistic Heavy Ion Collider (RHIC). The data obtained in the first three years of the RHIC physics program provide several lines of evidence that a novel state of matter has been created in the most violent, head-on collisions of Au nuclei at root s- = 200 GeV Jet quenching and global measurements show that the initial energy density of the strongly interacting medium generated in the collision is about two orders of magnitude larger than that of cold nuclear matter, well above the critical density for the deconfinement phase transition predicted by lattice QCD. The observed collective flow patterns imply that the system thermalizes early in its evolution, with the dynamics of its expansion consistent with ideal hydrodynamic flow based on a quark-gluon plasma equation of state. (c) 2004 Elsevier B.V. All rights reserved. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. RP Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. EM pmjacobs@lbl.gov; xnwang@lbl.gov OI Wang, Xin-Nian/0000-0002-9734-9967 NR 315 TC 160 Z9 163 U1 1 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0146-6410 J9 PROG PART NUCL PHYS PY 2004 VL 54 IS 2 BP 443 EP 534 DI 10.1016/j.ppnp.2004.09.001 PG 92 WC Physics, Nuclear; Physics, Particles & Fields SC Physics GA BBY28 UT WOS:000228298300002 ER PT J AU AbuShama, JAM Johnston, S Moriarty, T Teeter, G Ramanathan, K Noufi, R AF AbuShama, JAM Johnston, S Moriarty, T Teeter, G Ramanathan, K Noufi, R TI Properties of ZnO/CdS/CuInSe2 solar cells with improved performance SO PROGRESS IN PHOTOVOLTAICS LA English DT Article DE copper indium. diselenide; CuInSe2; admittance spectroscopy; grazing-angle incidence; three-stage process; thin-film solar cells; photovoltaics ID FILMS AB We report the growth and characterization of low-bandgap record-efficiency ZnO/CdS/CuInSe2 thin-film solar cells. The total area conversion efficiency for this cell is 14-5%. This result has been measured and confirmed at the National Renewable Energy Laboratory under standard reporting conditions (1000 W/M-2 25degreesC, AM1.5 Global). The improved performance of the CuInSe2 solar cell is primarily due to a high current density. Material and device characterization data are presented. Published in 2004 by John Wiley Sons, Ltd. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP AbuShama, JAM (reprint author), Natl Renewable Energy Lab, M-S 3211,1617 Cole Blvd, Golden, CO 80401 USA. EM jehad_abushama@nrel.gov NR 16 TC 88 Z9 90 U1 4 U2 28 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 1062-7995 J9 PROG PHOTOVOLTAICS JI Prog. Photovoltaics PD JAN PY 2004 VL 12 IS 1 BP 39 EP 45 DI 10.1002/pip.537 PG 7 WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied SC Energy & Fuels; Materials Science; Physics GA 767WC UT WOS:000188496000004 ER PT J AU Green, MA Emery, K King, DL Igari, S Warta, W AF Green, MA Emery, K King, DL Igari, S Warta, W TI Solar cell efficiency tables (version 23) SO PROGRESS IN PHOTOVOLTAICS LA English DT Article DE solar cell efficiency; photovoltaic efficiency; energy conversion efficiency AB Consolidated tables showing an extensive listing of the highest independently confirmed efficiencies for solar cells and modules are presented. Guidelines for inclusion of results into these tables are outlined and new entries since July 2003 are reviewed. Copyright (C) 2004 John Wiley Sons, Ltd. C1 Univ New S Wales, Ctr Photovolta Engn, Sydney, NSW 2052, Australia. Natl Renewable Energy Lab, Golden, CO 80401 USA. Sandia Natl Labs, Albuquerque, NM 87123 USA. Natl Inst Adv Ind Sci & Technol, Energy Elect Inst, Tsukuba, Ibaraki, Japan. Fraunhofer Inst Solar Energy Syst, Dept Solar Cells Mat & Technol, D-79110 Freiburg, Germany. RP Green, MA (reprint author), Univ New S Wales, Ctr Photovolta Engn, Sydney, NSW 2052, Australia. EM m.green@unsw.edu.au NR 47 TC 21 Z9 23 U1 3 U2 16 PU WILEY-BLACKWELL PI MALDEN PA COMMERCE PLACE, 350 MAIN ST, MALDEN 02148, MA USA SN 1062-7995 J9 PROG PHOTOVOLTAICS JI Prog. Photovoltaics PD JAN PY 2004 VL 12 IS 1 BP 55 EP 62 DI 10.1002/pip.530 PG 8 WC Energy & Fuels; Materials Science, Multidisciplinary; Physics, Applied SC Energy & Fuels; Materials Science; Physics GA 767WC UT WOS:000188496000006 ER PT J AU Fenter, P Sturchio, NC AF Fenter, Paul Sturchio, Neil C. TI Mineral-water interfacial structures revealed by synchrotron X-ray scattering SO PROGRESS IN SURFACE SCIENCE LA English DT Review DE X-ray scattering; X-ray reflectivity; Crystal truncation rod; Water; Mineral-water interface; Solid-liquid interface; Interfacial water; Surface relaxation; Surface structure ID ATOMIC-FORCE MICROSCOPY; MOLECULAR-DYNAMICS SIMULATION; SCANNING-TUNNELING-MICROSCOPY; SOLID-LIQUID INTERFACE; CRYSTAL-TRUNCATION-ROD; ALPHA-AL2O3 0001 SURFACE; PROTONATION EQUILIBRIUM-CONSTANTS; ELECTRODE-ELECTROLYTE INTERFACE; RADIAL-DISTRIBUTION FUNCTIONS; SUM-FREQUENCY SPECTROSCOPY AB Chemical reactions occurring at the mineral-water interface are controlled by an interfacial layer, nanometers thick, whose properties may deviate from those of the respective bulk mineral and water phases. The molecular-scale structure of this interfacial layer, however, is poorly constrained, and correlations between macroscopic phenomena and molecular-scale processes remain speculative. The application of high-resolution X-ray scattering techniques has begun to provide substantial new insights into the molecular-scale structure of the mineral-water interface. In this review, we describe the characteristics of synchrotron-based X-ray scattering techniques that make them uniquely powerful probes of mineral-water interfacial structures and discuss the new insights that have been derived from their application. In particular, we focus on efforts to understand the structure and distribution of interfacial water as well as their dependence on substrate properties for major mineral classes including oxides, carbonates, sulfates, phosphates, silicates, halides and chromates. We compare these X-ray scattering results with those from other structural and spectroscopic techniques and integrate these to provide a conceptual framework upon which to base an understanding of the systematic variation of mineral-water interfacial structures. (C) 2005 Elsevier Ltd. All rights reserved. C1 [Fenter, Paul] Argonne Natl Lab, Argonne, IL 60439 USA. [Sturchio, Neil C.] Univ Illinois, Dept Earth & Environm Sci, Chicago, IL 60607 USA. RP Fenter, P (reprint author), Argonne Natl Lab, ER 203,9700 S Cass Ave, Argonne, IL 60439 USA. EM fenter@anl.gov FU Department of Energy, through the Office of Basic Energy Sciences (Division of Chemical Sciences, Geosciences and Biosciences); US Department of Energy, Office of Science, Office of Basic Energy Sciences [W-31-109-ENG-38]; US Department of Energy, Division of Materials Sciences and Division of Chemical Sciences [DEAC02-98CH10886] FX We would like to acknowledge the many contributions that made this review possible. Part of the original work reviewed here was done by the Interfacial Processes Group at Argonne National Laboratory and involved a large number of researchers. Key contributions to this work were made by Likwan Cheng, Ron Chiarello, Phillip Geissbuhler, Changyong Park, Michel Schlegel, and Zhan Zhang. We also acknowledge ongoing interactions with Michael J. Bedzyk, Michael L. Machesky, Kathryn L. Nagy, and David J. Wesolowski. This work was supported by the Department of Energy, through the Office of Basic Energy Sciences (Division of Chemical Sciences, Geosciences and Biosciences). We would also like to thank Elias Vlieg for supplying pre-prints and other unpublished results, and Hoydoo You, Marianne Reedijk, Thomas Trainor, and Jon Sorenson for permission to reprint figures.; All of the work described in this manuscript is possible only as a result of the many synchrotron radiation user facilities that have become available in the past decades. Measurements by the Interfacial Processes Group were done at the Advanced Photon Source (Argonne National Laboratory) and the National Synchrotron Light Source (Brookhaven National Laboratory). The Advanced Photon Source was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. W-31-109-ENG-38. The National Synchrotron Light Source is supported by the US Department of Energy, Division of Materials Sciences and Division of Chemical Sciences, under Contract No. DEAC02-98CH10886. NR 346 TC 205 Z9 206 U1 12 U2 112 PU PERGAMON-ELSEVIER SCIENCE LTD PI OXFORD PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND SN 0079-6816 J9 PROG SURF SCI JI Prog. Surf. Sci. PY 2004 VL 77 IS 5-8 BP 171 EP 258 DI 10.1016/j.progsurf.2004.12.001 PG 88 WC Chemistry, Physical; Physics, Condensed Matter SC Chemistry; Physics GA V90UL UT WOS:000206137100002 ER PT J AU Esbensen, H AF Esbensen, H TI Challenges in coupled-channels calculations of heavy-ion fusion reactions SO PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT LA English DT Article; Proceedings Paper CT Fusion03 International Conference CY NOV 12-15, 2003 CL Matsushima, JAPAN ID SUBBARRIER FUSION; SCATTERING; EQUATIONS; REDUCTION; ENERGIES; BARRIER AB The approximations that are commonly made in coupled-channels calculations of heavy-ion fusion reactions are reviewed in order to show where uncertainties exist and improvements can be made. In particular, the failure in modeling the fusion at extreme subbarrier energies is discussed. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Esbensen, H (reprint author), Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM esbensen@anlphy.phy.anl.gov NR 24 TC 12 Z9 12 U1 0 U2 0 PU PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE PI KYOTO PA C/O KYOTO UNIV, YUKAWA HALL, KYOTO, 606-8502, JAPAN SN 0375-9687 J9 PROG THEOR PHYS SUPP JI Prog. Theor. Phys. Suppl. PY 2004 IS 154 BP 11 EP 20 PG 10 GA 845MG UT WOS:000223246200004 ER PT J AU Moller, P Sierk, AJ Ichikawa, T Iwamoto, A AF Moller, P Sierk, AJ Ichikawa, T Iwamoto, A TI Fission and fusion at the end of the periodic system SO PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT LA English DT Article; Proceedings Paper CT Fusion03 International Conference CY NOV 12-15, 2003 CL Matsushima, JAPAN ID POTENTIAL-ENERGY SURFACES; HALF-LIVES; NUCLEI; COLLISIONS AB We calculate in a macroscopic-microscopic model fission potential-energy surfaces for neutron-rich actinides and fission-fusion potential-energy surfaces relevant to the analysis of heavy-ion reactions employed to form heavy-element evaporation residues. We study the latter multidimensional potential-energy surfaces both inside and outside the touching point. Inside the point of contact we define the potential on a multi-million-point grid in 5D deformation space where elongation, merging projectile and target spheroidal shapes, neck radius and projectile/target mass asymmetry are independent shape variables. The same deformation space and the corresponding potential-energy surface also describe the shape evolution from the nuclear ground-state to separating fragments in fission, and the fast-fission trajectories in incomplete fusion. For separated nuclei we study the macroscopic-microscopic potential energy, that is the "collision surface" between a spheroidally deformed target and a spheroidally deformed projectile as a function of three coordinates which are: the relative location of the projectile center-of-mass with respect to the target center-of-mass and the spheroidal deformations of the target and the projectile. We limit our study to the most favorable relative positions of target and projectile, namely that the symmetry axes of the target and projectile are collinear. We also calculate fission barriers for a long sequence of uranium isotopes. The aim is to understand another attempted production mechanism for superheavy elements, namely neutron-capture in thermonuclear explosions. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87544 USA. Japan Atom Energy Res Inst, Tokai Res Estab, Tokai, Ibaraki 31911, Japan. RP Moller, P (reprint author), Los Alamos Natl Lab, Div Theoret, POB 1663, Los Alamos, NM 87544 USA. EM moller@moller.lanl.gov; iwamoto@hadron01.tokai.jaeri.go.jp NR 16 TC 1 Z9 1 U1 0 U2 0 PU PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE PI KYOTO PA C/O KYOTO UNIV, YUKAWA HALL, KYOTO, 606-8502, JAPAN SN 0375-9687 J9 PROG THEOR PHYS SUPP JI Prog. Theor. Phys. Suppl. PY 2004 IS 154 BP 21 EP 30 PG 10 WC Physics, Multidisciplinary SC Physics GA 845MG UT WOS:000223246200005 ER PT J AU Sinclair, DK Kogut, JB Toublan, D AF Sinclair, DK Kogut, JB Toublan, D TI Finite density lattice gauge theories with positive fermion determinants SO PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT LA English DT Article; Proceedings Paper CT International Workshop on Finite Density QCD CY JUL 10-12, 2003 CL Nara, JAPAN SP Osaka Univ, Res Ctr Nucl Phys ID QCD PHASE-DIAGRAM; BARYON DENSITY; ISOSPIN DENSITY; CONDENSATION; TEMPERATURE AB We perform simulations of (3-colour) QCD with 2 quark flavours at a finite chemical potential mu(I) for isospin (I-3), and of 2-colour QCD at a finite chemical potential mu for quark number. At zero temperature, QCD at finite mu(I) has a mean-field phase transition at mu(I) = m(pi) to a superfluid state with a charged pion condensate which spontaneously breaks I-3. We study the finite temperature transition as a function of mu(I). For mu(I) < m(pi), where this is closely related to the transition at finite it, this appears to be a crossover independent of quark mass, with no sign of the proposed critical endpoint. For mu(I) > m(pi) this becomes a true phase transition where the pion condensate evaporates. For mu(I) just above m(pi) the transition seems to be second order, while for larger mu(I) it appears to become first order. At zero temperature, 2-colour QCD also possesses a superfluid state with a diquark condensate. We study its spectrum of Goldstone and pseudo-Goldstone bosons associated with chiral and quark-number symmetry breaking. C1 Argonne Natl Lab, HEP Div, Argonne, IL 60439 USA. Univ Illinois, Dept Phys, Urbana, IL 61801 USA. RP Argonne Natl Lab, HEP Div, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 31 TC 8 Z9 8 U1 0 U2 0 PU PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE PI KYOTO PA C/O KYOTO UNIV, YUKAWA HALL, KYOTO, 606-8502, JAPAN SN 0375-9687 J9 PROG THEOR PHYS SUPP JI Prog. Theor. Phys. Suppl. PY 2004 IS 153 BP 40 EP 50 PG 11 GA 826NI UT WOS:000221835400005 ER PT J AU Jiang, CL Esbensen, H Rehm, KE Back, BB Janssens, RVF Davids, CN Greene, JP Henderson, DJ Mukherjee, G Pardo, RC Pennington, TO Seweryniak, D Sinha, S Zhou, Z Paul, M Collon, P Caggiano, JA Heinz, AM Nishinaka, I AF Jiang, CL Esbensen, H Rehm, KE Back, BB Janssens, RVF Davids, CN Greene, JP Henderson, DJ Mukherjee, G Pardo, RC Pennington, TO Seweryniak, D Sinha, S Zhou, Z Paul, M Collon, P Caggiano, JA Heinz, AM Nishinaka, I TI Systematics of heavy-ion fusion reactions at extreme sub-barrier energies SO PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT LA English DT Article; Proceedings Paper CT Fusion03 International Conference CY NOV 12-15, 2003 CL Matsushima, JAPAN ID SUB-BARRIER FUSION; NI-58 AB A new measurement of fusion reactions down to 10 nb has been performed for the system Ni-64 + Ni-64. Coupled-channels analyses have been carried out for the systems Ni-60 + Y-89 and Ni-64 + Ni-64. They demonstrate that coupled-channels calculations are unable to reproduce the unexpected steep falloff of the cross sections at extreme sub-barrier energies. Heavy-ion fusion excitation functions are also analyzed in terms of the S factor, as this offers a pragmatic way to study fusion behavior in the energy regime of interest. It is shown that the steep falloff in cross section observed in several heavy-ion systems translates into a maximum of the S factor. The energies where the maximum occurs can be parameterized with a simple empirical formula. The parameterization, which is derived here for rather stiff heavy-ion systems, provides also an upper limit for reactions involving softer nuclei. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. Hebrew Univ Jerusalem, Jerusalem, Israel. Univ Notre Dame, Notre Dame, IN 46556 USA. Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06511 USA. Japan Atom Energy Res Inst, Tokai, Ibaraki 3191195, Japan. RP Argonne Natl Lab, Div Phys, 9700 S Cass Ave, Argonne, IL 60439 USA. EM jiang@phy.anl.gov; esbensen@anlphy.phy.anl.gov; ichiro@popsvr.tokai.jaeri.go.jp RI Heinz, Andreas/E-3191-2014 NR 25 TC 7 Z9 7 U1 0 U2 0 PU PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE PI KYOTO PA C/O KYOTO UNIV, YUKAWA HALL, KYOTO, 606-8502, JAPAN SN 0375-9687 J9 PROG THEOR PHYS SUPP JI Prog. Theor. Phys. Suppl. PY 2004 IS 154 BP 61 EP 68 PG 8 GA 845MG UT WOS:000223246200010 ER PT J AU Ebisawa, K Zycki, PT Kubota, A Mizuno, T Watarai, K AF Ebisawa, K Zycki, PT Kubota, A Mizuno, T Watarai, K TI Accretion disk spectra of the ultra-luminous X-ray sources in nearby spiral galaxies and galactic superluminal jet sources SO PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT LA English DT Article; Proceedings Paper CT International Workshop on Stellar-Mass, International-Mass, and Supermassive Black Holes CY OCT 28-31, 2003 CL Kyoto Int Commun House, Kyoto, JAPAN HO Kyoto Int Commun House ID BLACK-HOLE; GRO J1655-40; MODEL AB Ultra-luminous Compact X-ray Sources (ULXs) in nearby spiral galaxies and Galactic superluminal jet sources share the common spectral characteristic that they have unusually high disk temperatures which cannot be explained in the framework of the standard optically thick accretion disk in the Schwarzschild metric. On the other hand, the standard accretion disk around the Kerr black hole might explain the observed high disk temperature, as the inner radius of the Kerr disk gets smaller and the disk temperature can be consequently higher. However, we point out that the observable Kerr disk spectra becomes significantly harder than Schwarzschild disk spectra only when the disk is highly inclined. This is because the emission from the innermost part of the accretion disk is Doppler-boosted for an edge-on Kerr disk, while hardly seen for a, face-on disk. The Galactic superluminal jet sources are known to be highly inclined systems, thus their energy spectra may be explained with the standard Kerr disk with known black hole masses. For ULXs, on the other hand, the standard Kerr disk model seems implausible, since it is highly unlikely that their accretion disks are preferentially inclined, and, if edge-on Kerr disk model is applied, the black hole mass becomes unreasonably large (greater than or similar to 300 M-circle dot). Instead, the slim disk (advection dominated optically thick disk) model is likely to explain the observed super-Eddington luminosities, hard energy spectra, and spectral variations of ULXs. We suggest that ULXs are accreting black holes with a few tens of solar mass, which is not unexpected from the standard stellar evolution scenario, and that their X-ray emission is from the slim disk shining at super-Eddington luminosities. C1 NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. INTEGRAL Sci Data Ctr, CH-1290 Chavannes Des Bois, Switzerland. Nicholas Copernicus Astron Ctr, PL-00716 Warsaw, Poland. Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan. Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan. RP Ebisawa, K (reprint author), Univ Space Res Assoc, 7501 Forbes Blvd 206, Searbrook, MD 20706 USA. NR 15 TC 0 Z9 0 U1 0 U2 0 PU PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE PI KYOTO PA C/O KYOTO UNIV, YUKAWA HALL, KYOTO, 606-8502, JAPAN SN 0375-9687 J9 PROG THEOR PHYS SUPP JI Prog. Theor. Phys. Suppl. PY 2004 IS 155 BP 67 EP 70 PG 4 GA 874LB UT WOS:000225350800009 ER PT J AU Liang, JF Shapira, D Gross, CJ Beene, JR Bierman, JD Galindo-Uribarri, A del Campo, JG Hausladen, PA Larochelle, Y Loveland, W Mueller, PE Peterson, D Radford, DC Stracener, DW Varner, RL AF Liang, JF Shapira, D Gross, CJ Beene, JR Bierman, JD Galindo-Uribarri, A del Campo, JG Hausladen, PA Larochelle, Y Loveland, W Mueller, PE Peterson, D Radford, DC Stracener, DW Varner, RL TI Sub-barrier fusion enhancement in neutron-rich radioactive Sn-132 on Ni-64 SO PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT LA English DT Article; Proceedings Paper CT Fusion03 International Conference CY NOV 12-15, 2003 CL Matsushima, JAPAN ID SUPERHEAVY ELEMENTS; ION-BEAMS; NUCLEI; BARRIER; MODEL AB Evaporation residue cross sections have been measured using neutron-rich radioactive Sn-132 beams incident on a Ni-64 target in the vicinity of the Coulomb barrier. This is the first experiment using accelerated Sn-132 beams to study nuclear reaction mechanisms. The average beam intensity was 2 x 104 particles per second and the smallest cross section measured was less than 5 mb. A large sub-barrier fusion enhancement was observed compared to evaporation residue cross sections for Ni-64 on stable even Sn isotopes. The enhancement cannot be accounted for by a simple barrier shift due to the change in nuclear sizes. Coupled-channel calculations including inelastic excitation underpredict the measured cross sections below the barrier. The presence of several neutron transfer channels with large positive Q values suggests that multinucleon transfer may play an important role in enhancing the fusion of Sn-132 and Ni-64. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. Gonzaga Univ, Dept Phys, Spokane, WA 99258 USA. Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37966 USA. Oregon State Univ, Dept Chem, Corvallis, OR 97331 USA. RP Liang, JF (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. EM liang@mail.phy.ornl.gov RI radford, David/A-3928-2015 NR 21 TC 2 Z9 2 U1 0 U2 1 PU PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE PI KYOTO PA C/O KYOTO UNIV, YUKAWA HALL, KYOTO, 606-8502, JAPAN SN 0375-9687 J9 PROG THEOR PHYS SUPP JI Prog. Theor. Phys. Suppl. PY 2004 IS 154 BP 106 EP 112 PG 7 GA 845MG UT WOS:000223246200016 ER PT J AU Thomas, AW Guichon, PAM Leinweber, DB Young, RD AF Thomas, AW Guichon, PAM Leinweber, DB Young, RD TI Towards a connection between nuclear structure and QCD SO PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT LA English DT Article; Proceedings Paper CT YITP Workshop on Nuclear Matter under Extreme Conditions CY DEC 01-03, 2003 CL Kyoto, JAPAN SP YITP ID CHIRAL PERTURBATION-THEORY; BARYON MASSES; FORM-FACTORS; MATTER; MODEL; SYMMETRY; QUARK; CONVERGENCE; SCALE AB As we search for an ever deeper understanding of the structure of hadronic matter one of the most fundamental questions is whether or not one can make a connection to the underlying theory of the strong interaction, QCD. We build on recent advances in the chiral extrapolation problem linking lattice QCD at relatively large "light quark" masses to the physical world to estimate the scalar polarizability of the nucleon. The latter plays a key role in modern relativistic mean-field descriptions of nuclei and nuclear matter (such as QMC) and, in particular, leads to a very natural saturation mechanism. We demonstrate that the value of the scalar polarizability extracted from the lattice data is consistent with that needed for a successful description of nuclei within the framework of QMC. In a very real sense this is the first hint of a direct connection between QCD and the properties of finite nuclei. C1 Jefferson Lab, Newport News, VA 23606 USA. RP Jefferson Lab, 12000 Jefferson ave, Newport News, VA 23606 USA. RI Thomas, Anthony/G-4194-2012; Young, Ross/H-8207-2012; Leinweber, Derek/J-6705-2013 OI Thomas, Anthony/0000-0003-0026-499X; Leinweber, Derek/0000-0002-4745-6027 NR 44 TC 14 Z9 14 U1 0 U2 0 PU PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE PI KYOTO PA C/O KYOTO UNIV, YUKAWA HALL, KYOTO, 606-8502, JAPAN SN 0375-9687 J9 PROG THEOR PHYS SUPP JI Prog. Theor. Phys. Suppl. PY 2004 IS 156 BP 124 EP 136 PG 13 GA 894QC UT WOS:000226805700010 ER PT J AU Stephanov, M AF Stephanov, M TI QCD phase diagram and the critical point SO PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT LA English DT Article; Proceedings Paper CT International Workshop on Finite Density QCD CY JUL 10-12, 2003 CL Nara, JAPAN SP Osaka Univ, Res Ctr Nucl Phys ID HEAVY-ION COLLISIONS; BY-EVENT FLUCTUATIONS; CHIRAL-SYMMETRY BREAKING; DYNAMIC CRITICAL PHENOMENA; LATTICE QCD; FINITE-DENSITY; COLOR SUPERCONDUCTIVITY; BARYON DENSITY; PHI-MEASURE; TEMPERATURE AB The recent progress in understanding the QCD phase diagram and the physics of the QCD critical point is reviewed. C1 Univ Illinois, Dept Phys, Chicago, IL 60607 USA. Brookhaven Natl Lab, BNL Res Ctr, RIKEN, Upton, NY 11973 USA. RP Univ Illinois, Dept Phys, Chicago, IL 60607 USA. NR 91 TC 181 Z9 182 U1 0 U2 1 PU PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE PI KYOTO PA C/O KYOTO UNIV, YUKAWA HALL, KYOTO, 606-8502, JAPAN SN 0375-9687 J9 PROG THEOR PHYS SUPP JI Prog. Theor. Phys. Suppl. PY 2004 IS 153 BP 139 EP 156 PG 18 GA 826NI UT WOS:000221835400015 ER PT J AU Kitazawa, M Koide, T Kunihiro, T Nemoto, Y AF Kitazawa, M Koide, T Kunihiro, T Nemoto, Y TI Non-equilibrium critical dynamics and precursory phenomena in color superconductivity SO PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT LA English DT Article; Proceedings Paper CT YITP Workshop on Nuclear Matter under Extreme Conditions CY DEC 01-03, 2003 CL Kyoto, JAPAN SP YITP AB We derive an effective equation to describe the non-equilibrium dynamics of the pair field of color superconductivity near the critical temperature. We also discuss how critical dynamics affects the specific heat and density of state above the critical temperature. C1 Kyoto Univ, Dept Phys, Kyoto 6068502, Japan. Univ Frankfurt, Inst Theoret Phys, D-60054 Frankfurt, Germany. Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan. BNL, RIKEN BNL Res Ctr, Upton, NY 11973 USA. RP Kyoto Univ, Dept Phys, Kyoto 6068502, Japan. NR 3 TC 0 Z9 0 U1 0 U2 0 PU PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE PI KYOTO PA C/O KYOTO UNIV, YUKAWA HALL, KYOTO, 606-8502, JAPAN SN 0375-9687 J9 PROG THEOR PHYS SUPP JI Prog. Theor. Phys. Suppl. PY 2004 IS 156 BP 176 EP 177 PG 2 GA 894QC UT WOS:000226805700027 ER PT J AU Reddy, S Sadzikowski, M Tachibana, M AF Reddy, S Sadzikowski, M Tachibana, M TI Neutrino processes in the K-0 condensed phase of color flavor locked quark matter SO PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT LA English DT Article; Proceedings Paper CT International Workshop on Finite Density QCD CY JUL 10-12, 2003 CL Nara, JAPAN SP Osaka Univ, Res Ctr Nucl Phys ID HIGH-DENSITY QCD; LOCKING AB We study weak interaction rates involving Goldstone bosons in the neutral kaon condensed phase of color flavor locked quark matter. We identify the dominant processes that contribute to the neutrino mean free path and to neutrino production. We find unique characteristics of weak interaction rates in this novel phase and discuss how they might influence neutrino emission in a core collapse supernova. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. Inst Nucl Phys, PL-31342 Krakow, Poland. RIKEN, Theoret Phys Lab, Wako, Saitama 3510198, Japan. RP Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. NR 15 TC 1 Z9 1 U1 0 U2 0 PU PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE PI KYOTO PA C/O KYOTO UNIV, YUKAWA HALL, KYOTO, 606-8502, JAPAN SN 0375-9687 J9 PROG THEOR PHYS SUPP JI Prog. Theor. Phys. Suppl. PY 2004 IS 153 BP 259 EP 269 PG 11 GA 826NI UT WOS:000221835400025 ER PT J AU Kawai, N Matsuoka, M Yoshida, A Shirasaki, Y Ricker, G Doty, J Vanderspek, R Crew, G Villasenor, J Atteia, JL Fenimore, EE Galassi, M Lamb, DQ Graziani, C Hurley, K Jernigan, JG Woosley, S Martel, F Monnelly, G Prigozhin, G Olive, JF Dezalay, JP Boer, M Pizzichini, G Cline, T Levine, A Morgan, E Tamagawa, T Butler, N Sakamoto, T Torii, K Barraud, C Donaghy, T Suzuki, M Nakagawa, Y Takahashi, D Tavenner, T Sato, R Urata, Y Manchanda, R Azzibrouck, G Braga, J Takagishi, K Yamauchi, M Hatsukade, I AF Kawai, N Matsuoka, M Yoshida, A Shirasaki, Y Ricker, G Doty, J Vanderspek, R Crew, G Villasenor, J Atteia, JL Fenimore, EE Galassi, M Lamb, DQ Graziani, C Hurley, K Jernigan, JG Woosley, S Martel, F Monnelly, G Prigozhin, G Olive, JF Dezalay, JP Boer, M Pizzichini, G Cline, T Levine, A Morgan, E Tamagawa, T Butler, N Sakamoto, T Torii, K Barraud, C Donaghy, T Suzuki, M Nakagawa, Y Takahashi, D Tavenner, T Sato, R Urata, Y Manchanda, R Azzibrouck, G Braga, J Takagishi, K Yamauchi, M Hatsukade, I TI HETE-2 observations of gamma-ray bursts and their follow-ups SO PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT LA English DT Article; Proceedings Paper CT International Workshop on Stellar-Mass, International-Mass, and Supermassive Black Holes CY OCT 28-31, 2003 CL Kyoto Int Commun House, Kyoto, JAPAN HO Kyoto Int Commun House ID EARLY OPTICAL-EMISSION; AFTERGLOW; DISCOVERY; SUPERNOVA; FLASHES AB The High Energy Transient Explorer 2 (HETE-2), launched in October 2000, is currently localizing gamma-ray bursts (GRBs) at a rate of similar to20 yr(-1) many in real time. As of September 2003, HETE-2 had localized 47 GRBs; 16 localizations had led to the detection of an X-ray, optical, or radio afterglows. The prompt position notification of HETE-2 enabled probing the nature of so-called "dark bursts" for which no optical afterglows were found despite of accurate localizations. In some cases, the optical afterglow was found to be intrinsically faint, and its flux declined rapidly. In another case, the optical emission was likely to be extinguished by the dust in the vicinity of the GRB source. The bright afterglows of GRB021004 and GRB030329 were observed in unprecedented details by telescopes around the world. Strong evidence for the association of long GRBs with the core-collapse supernovae was found. HETE-2 has localized almost as many X-ray rich GRBs as classical GRBs. The nature of the X-ray rich GRBs a-rid X-ray flashes have been studied systematically with HETE-2, and they are found to have many properties in common with the classical GRBs, suggesting that they are a single phenomenon. C1 Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan. RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan. Natl Space Dev Agcy Japan, Tsukuba, Ibaraki 3058505, Japan. Aoyama Gakuin Univ, Sagamihara, Kanagawa 2298558, Japan. Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan. MIT, Ctr Space Res, Cambridge, MA 02139 USA. Observ Midi Pyrenees, F-31400 Toulouse, France. Los Alamos Natl Lab, Los Alamos, NM USA. Univ Chicago, Ctr Astron & Astrophys, Chicago, IL 60637 USA. Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA. Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA. Ctr Etud Spatiale Rayonnements, Toulouse, France. CNR, IASF, TESRE, I-40126 Bologna, Italy. NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA. Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India. Univ Sci & Tech Masuku, Franceville, Gabon. Inst Nacl Pesquisas Espaciais, BR-12201 Sao Jose Dos Campos, Brazil. Miyazaki Univ, Fac Engn, Miyazaki 8892192, Japan. RP Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan. OI Boer, Michel/0000-0001-9157-4349 NR 45 TC 0 Z9 0 U1 0 U2 0 PU PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE PI KYOTO PA C/O KYOTO UNIV, YUKAWA HALL, KYOTO, 606-8502, JAPAN SN 0375-9687 J9 PROG THEOR PHYS SUPP JI Prog. Theor. Phys. Suppl. PY 2004 IS 155 BP 279 EP 286 PG 8 GA 874LB UT WOS:000225350800038 ER PT J AU Kitazawa, M Koide, T Kunihiro, T Nemoto, Y AF Kitazawa, M Koide, T Kunihiro, T Nemoto, Y TI Pseudogap of color superconductivity SO PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT LA English DT Article; Proceedings Paper CT International Workshop on Finite Density QCD CY JUL 10-12, 2003 CL Nara, JAPAN SP Osaka Univ, Res Ctr Nucl Phys AB We show, that the pseudogap of the quark density of states is formed in hot quark matter as a precursory phenomenon of the color superconductivity on the basis of a low-energy effective theory. We clarify that the soft mode of the di-quark pair field gives rise to a peculiar behavior of the quark dispersion relation and a short life-time of the quasiparticles near the Fermi surface, both of which make a depression of the density of states of quarks. Our result suggests that the appearance of the pseudogap is a universal phenomenon of strong coupling superconductors, irrespective of the dimensionality. C1 Kyoto Univ, Dept Phys, Kyoto 6068502, Japan. Goethe Univ Frankfurt, Inst Theoret Phys, D-60054 Frankfurt, Germany. Kyoto Univ, Yukawa Inst Theoret Phys, Kyoto 6068502, Japan. Brookhaven Natl Lab, RIKEN BNL Res Ctr, Upton, NY 11973 USA. RP Kyoto Univ, Dept Phys, Kyoto 6068502, Japan. NR 8 TC 1 Z9 1 U1 0 U2 0 PU PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE PI KYOTO PA C/O KYOTO UNIV, YUKAWA HALL, KYOTO, 606-8502, JAPAN SN 0375-9687 J9 PROG THEOR PHYS SUPP JI Prog. Theor. Phys. Suppl. PY 2004 IS 153 BP 301 EP 304 PG 4 GA 826NI UT WOS:000221835400030 ER PT J AU Fukazawa, Y Obsugi, T Yoshida, S Kamae, T Mizuno, T Takahashi, T Ozaki, M Kawai, N Kataoka, J AF Fukazawa, Y Obsugi, T Yoshida, S Kamae, T Mizuno, T Takahashi, T Ozaki, M Kawai, N Kataoka, J CA Glast Team TI The next gamma-ray satellite GLAST for BLAZAR observations SO PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT LA English DT Article; Proceedings Paper CT International Workshop on Stellar-Mass, International-Mass, and Supermassive Black Holes CY OCT 28-31, 2003 CL Kyoto Int Commun House, Kyoto, JAPAN HO Kyoto Int Commun House ID SILICON STRIP SENSORS AB The next gamma-ray satellite GLAST will be launched in 2007, under the cooperation of the USA, Japan, Italy, France, Sweden, and so on. GLAST sensitivity is several tens times higher than the EGRET, thanks to good position determination, large effective area, and wide field of view. The key technology to achieve these capabilities is low-noise "silicon-strip-detector" (SSD), developed and designed by Hiroshima University and Hamamatsu Photonics. Most of the GLAST SSD has been produced, and found to be very high-quality devices with quite a low rate of dead channels of < 0.01%. The detector assembly has started, and soon one tower will become built for various environmental tests. GLAST will detect several thousands of BLAZARs, and thus enable us to probe the jet mechanisms and evolution of massive black holes. Good position accuracy will in addition increase an identification. The high-sensitivity, wide-energy-band, and continuous-long-time observations of BLAZARs with GLAST LAT will be hoped to open a new epoch of massive black-hole observations. Especially, the flare history is very important to consider the jet mechanims and particle acceleration. C1 Hiroshima Univ, Higashihiroshima 7398536, Japan. SLAC, Stanford, CA 94309 USA. ISAS, Sagamihara, Kanagawa 2298510, Japan. Tokyo I Tech, Tokyo 1528551, Japan. RP Hiroshima Univ, Higashihiroshima 7398536, Japan. RI Ozaki, Masanobu/K-1165-2013 NR 3 TC 0 Z9 0 U1 0 U2 1 PU PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE PI KYOTO PA C/O KYOTO UNIV, YUKAWA HALL, KYOTO, 606-8502, JAPAN SN 0375-9687 J9 PROG THEOR PHYS SUPP JI Prog. Theor. Phys. Suppl. PY 2004 IS 155 BP 327 EP 328 PG 2 GA 874LB UT WOS:000225350800053 ER PT J AU Oganessian, YT Utyonkov, VK Lobanov, YV Abdullin, FS Polyakov, AN Shirokovsky, IV Tsyganov, YS Gulbekian, GG Bogomolov, SL Gikal, BN Mezentsev, AN Iliev, S Subbotin, VG Sukhov, AM Voinov, AA Buklanov, GV Zagrebaev, VI Itkis, MG Moody, KJ Wild, JF Stoyer, MA Stoyer, NJ Shaughnessy, DA Kenneally, JM Patin, JB Lougheed, RW AF Oganessian, YT Utyonkov, VK Lobanov, YV Abdullin, FS Polyakov, AN Shirokovsky, IV Tsyganov, YS Gulbekian, GG Bogomolov, SL Gikal, BN Mezentsev, AN Iliev, S Subbotin, VG Sukhov, AM Voinov, AA Buklanov, GV Zagrebaev, VI Itkis, MG Moody, KJ Wild, JF Stoyer, MA Stoyer, NJ Shaughnessy, DA Kenneally, JM Patin, JB Lougheed, RW TI Synthesis of superheavy nuclei in Ca-48-induced reactions SO PROGRESS OF THEORETICAL PHYSICS SUPPLEMENT LA English DT Article; Proceedings Paper CT Fusion03 International Conference CY NOV 12-15, 2003 CL Matsushima, JAPAN ID HEAVIEST NUCLEI; DISCOVERY; ELEMENTS; N=162; DECAY AB This paper presents results of experiments aimed at producing long-lived superheavy elements located near the spherical shells at Z greater than or equal to 114 and N greater than or equal to 172 in the reactions of neutron-rich isotopes Pu-242,Pu-244, Am-243, Cm-245,Cm-248 and Cf-249 with Ca-48 projectiles. The decay properties of the synthesized nuclei are consistent with the consecutive alpha-decays originating in the decays of parent nuclides (286,287,288,289)114, (287,288)115, (290,291,293)116 and (294)118 produced in the 2n- to 5n-evaporation channels. The present observations can be considered to be experimental evidence of the existence of the "island of stability" of superheavy elements. C1 Joint Inst Nucl Res, Dubna 141980, Russia. Lawrence Livermore Natl Lab, Livermore, CA 94551 USA. RP Oganessian, YT (reprint author), Joint Inst Nucl Res, Dubna 141980, Russia. EM utyonkov@sungns.jinr.ru NR 35 TC 3 Z9 3 U1 0 U2 1 PU PROGRESS THEORETICAL PHYSICS PUBLICATION OFFICE PI KYOTO PA C/O KYOTO UNIV, YUKAWA HALL, KYOTO, 606-8502, JAPAN SN 0375-9687 J9 PROG THEOR PHYS SUPP JI Prog. Theor. Phys. Suppl. PY 2004 IS 154 BP 406 EP 416 PG 11 GA 845MG UT WOS:000223246200055 ER PT B AU Sanchez, L Wang, C Laurant, J AF Sanchez, L Wang, C Laurant, J BE Clar, M Carpenter, D Gracie, J Slate, L TI Managing the Arroyo Seco for flood prevention, erosion control, waterway and habitat restoration SO PROTECTION AND RESTORATION OF URBAN AND RURAL STREAMS LA English DT Proceedings Paper CT Symposium on Protection and Restoration of Urban and Rural Streams CY JUN 23-25, 2003 CL Philadelphia, PA SP Urban Water Resources Res Council, Urban Streams Comm, Waterways Council, River Restorat Comm, Amer Soc Civil Engineers, Environm & Water Resources Inst AB One of the most important tasks for a site facility manager is to ensure that appropriate channel erosion controls are applied to on-site drainage channels. These erosion controls must minimize risks to the public and structures. Water and sediment loads commonly originate from off-site sources and many of the traditional reactionary measures (installing rip-rap or some other form of bed or bank armor) simply transfer or delay the problem. State and federal agency requirements further complicate the management solution. One case in point is the Arroyo Seco, an intermittent stream that runs along the southwest corner of the Lawrence Livermore National Laboratory (LLNL) in Livermore, California. In 2001, LLNL contracted Questa Engineering Corporation to conduct hydraulic, geomorphic, and biological investigations and to prepare an alternatives and constraints analysis. From these investigations, LLNL has selected a water management plan that encompasses overall flood prevention, erosion control, and waterway and habitat restoration and enhancement elements. The most unique aspect of the Arroyo Seco management plan is its use of non-traditional and biotechnical techniques. C1 LLNL, Environm Protect Dept, Livermore, CA 94551 USA. RP Sanchez, L (reprint author), LLNL, Environm Protect Dept, POB 808,L-627, Livermore, CA 94551 USA. NR 2 TC 0 Z9 0 U1 1 U2 5 PU AMER SOC CIVIL ENGINEERS PI NEW YORK PA UNITED ENGINEERING CENTER, 345 E 47TH ST, NEW YORK, NY 10017-2398 USA BN 0-7844-0695-2 PY 2004 BP 392 EP 399 PG 8 WC Environmental Sciences; Water Resources SC Environmental Sciences & Ecology; Water Resources GA BAH14 UT WOS:000222180700039 ER PT J AU Kleiger, G Panina, EM Mallick, P Eisenberg, D AF Kleiger, G Panina, EM Mallick, P Eisenberg, D TI PFIT and PFRIT: Bioinformatic algorithms for detecting glycosidase function from structure and sequence SO PROTEIN SCIENCE LA English DT Article DE glycosidase; tertiary interaction; bioinformatics; structure; alpha/beta barrel; fold ID ANGSTROM RESOLUTION; CRYSTAL-STRUCTURE; EVOLUTIONARY RELATIONSHIPS; PYROBACULUM-AEROPHILUM; FOLD; CLASSIFICATION; HYDROLASES; ASSIGNMENT; FAMILIES; PROTEINS AB The identification of the enzymes involved in the metabolism of simple and complex carbohydrates presents one bioinformatic challenge in the post-genomic era. Here, we present the PFIT and PFRIT algorithms for identifying those proteins adopting the alpha/beta barrel fold that function as glycosidases. These algorithms are based on the observation that proteins adopting the alpha/beta barrel fold share positions in their tertiary structures having equivalent sets of atomic interactions. These are conserved tertiary interaction positions, which have been implicated in both structure and function. Glycosidases adopting the alpha/beta barrel fold share more conserved tertiary interactions than alpha/beta barrel proteins having other functions. The enrichment pattern of conserved tertiary interactions in the glycosidases is the information that PFIT and PFRIT use to predict whether any given alpha/beta barrel will function as a glycosidase or not. Using as a test set a database of 19 glycosidase and 45 nonglycosidase alpha/beta barrel proteins with low sequence similarity, PFIT and PFRIT can correctly predict glycosidase function for 84% of the proteins known to function as glycosidases. PFIT and PFRIT incorrectly predict glycosidase function for 25% of the nonglycosidases. The program PSI-BLAST can also correctly identify 84% of the 19 glycosidases, however, it incorrectly predicts glycosidase function for 50% of the nonglycosidases (twofold greater than PFIT and PFRIT). Overall, we demonstrate that the structure-based PFIT and PFRIT algorithms are both more selective and sensitive for predicting glycosidase function than the sequence-based PSI-BLAST algorithm. C1 Univ Calif Los Angeles, Howard Hughes Med Inst, US DOE, Inst Genom Proteom, Los Angeles, CA 90095 USA. RP Eisenberg, D (reprint author), Univ Calif Los Angeles, Howard Hughes Med Inst, US DOE, Inst Genom Proteom, Box 951570, Los Angeles, CA 90095 USA. NR 23 TC 1 Z9 2 U1 0 U2 2 PU COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT PI WOODBURY PA 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2924 USA SN 0961-8368 J9 PROTEIN SCI JI Protein Sci. PD JAN PY 2004 VL 13 IS 1 BP 221 EP 229 DI 10.1110/ps.03274104 PG 9 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 757XX UT WOS:000187587700022 PM 14691237 ER PT J AU Podust, LM Bach, H Kim, Y Lamb, DC Arase, M Sherman, DH Kelly, SL Waterman, MR AF Podust, LM Bach, H Kim, Y Lamb, DC Arase, M Sherman, DH Kelly, SL Waterman, MR TI Comparison of the 1.85 A structure of CYP154A1 from Streptomyces coelicolor A3(2) with the closely related CYP154C1 and CYPs from antibiotic biosynthetic pathways SO PROTEIN SCIENCE LA English DT Article DE Streptomyces; P450; CYP154A1; antibiotic biosynthesis; heme orientation; X-ray structure ID GENE-CLUSTER; SEQUENCE-ANALYSIS; POLYKETIDE SYNTHASE; THERMOPHILIC CYTOCHROME-P450; SACCHAROPOLYSPORA-ERYTHRAEA; ERYTHROMYCIN BIOSYNTHESIS; SULFOLOBUS-SOLFATARICUS; NUCLEOTIDE-SEQUENCE; CRYSTAL-STRUCTURE; HEME ORIENTATION AB The genus Streptomyces produces two-thirds of microbially derived antibiotics. Polyketides form the largest and most diverse group of these natural products. Antibiotic diversity of polyketides is generated during their biosynthesis by several means, including postpolyketide modification performed by oxidoreductases, a broad group of enzymes including cytochrome P450 monooxygenases (CYPs). CYPs catalyze site-specific oxidation of macrolide antibiotic precursors significantly affecting antibiotic activity. Efficient manipulation of Streptomyces CYPs in generating new antibiotics will require identification and/or engineering of monooxygenases with activities toward a diverse array of chemical substrates. To begin to link structure to function of CYPs involved in secondary metabolic pathways of industrially important species, we determined the X-ray structure of Streptomyces coelicolor A3(2) CYP154A1 at 1.85 Angstrom and analyzed it in the context of the closely related CYP154C1 and more distant CYPs from polyketide synthase (EryF) and nonribosomal peptide synthetase (OxyB) biosynthetic, pathways. In contrast to CYP154C1, CYP154A1 reveals an active site inaccessible from the molecular surface, and an absence of catalytic activities observed for CYP154C1. Systematic variations in the amino acid patterns and length of the surface HI loop correlate with degree of rotation of the F and G helices relative to the active site in CYP154A1-related CYPs, presumably regulating the degree of active site accessibility and its dimensions. Heme in CYP154A1 is in a 180degrees flipped orientation compared with most other structurally determined CYPs. C1 Vanderbilt Univ, Sch Med, Dept Biochem, Nashville, TN 37232 USA. Univ Michigan, Dept Med Chem, Ann Arbor, MI 48109 USA. Argonne Natl Lab, Struct Biol Ctr, Argonne, IL 60439 USA. Univ Wales Aberystwyth, Inst Biol Sci, Wolfson Lab P450 Biodivers, Aberystwyth SY23 3DA, Dyfed, Wales. RP Podust, LM (reprint author), Vanderbilt Univ, Sch Med, Dept Biochem, 23rd S Pierce, Nashville, TN 37232 USA. FU NIEHS NIH HHS [ES00267, P30 ES000267]; NIGMS NIH HHS [R01 GM048562, GM48562, R37 GM037942, GM37942] NR 53 TC 29 Z9 31 U1 0 U2 4 PU COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT PI WOODBURY PA 500 SUNNYSIDE BLVD, WOODBURY, NY 11797-2924 USA SN 0961-8368 J9 PROTEIN SCI JI Protein Sci. PD JAN PY 2004 VL 13 IS 1 BP 255 EP 268 DI 10.1110/ps.03384804 PG 14 WC Biochemistry & Molecular Biology SC Biochemistry & Molecular Biology GA 757XX UT WOS:000187587700025 PM 14691240 ER PT J AU Page, R Nelson, MS von Delft, F Elsliger, MA Canaves, JM Brinen, LS Dai, XP Deacon, AM Floyd, R Godzik, A Grittini, C Grzechnik, SK Jaroszewski, L Klock, HE Koesema, E Kovarik, JS Kreusch, A Kuhn, P Lesley, SA McMullan, D McPhillips, TM Miller, MD Morse, A Moy, K Ouyang, J Robb, A Rodrigues, K Schwarzenbacher, R Spraggon, G Stevens, RC van den Bedem, H Velasquez, J Vincent, J Wang, XH West, B Wolf, G Hodgson, KO Wooley, J Wilson, IA AF Page, R Nelson, MS von Delft, F Elsliger, MA Canaves, JM Brinen, LS Dai, XP Deacon, AM Floyd, R Godzik, A Grittini, C Grzechnik, SK Jaroszewski, L Klock, HE Koesema, E Kovarik, JS Kreusch, A Kuhn, P Lesley, SA McMullan, D McPhillips, TM Miller, MD Morse, A Moy, K Ouyang, J Robb, A Rodrigues, K Schwarzenbacher, R Spraggon, G Stevens, RC van den Bedem, H Velasquez, J Vincent, J Wang, XH West, B Wolf, G Hodgson, KO Wooley, J Wilson, IA TI Crystal structure of gamma-glutamyl phosphate reductase (TM0293) from Thermotoga maritima at 2.0 angstrom resolution SO PROTEINS-STRUCTURE FUNCTION AND GENETICS LA English DT Article ID ALDEHYDE DEHYDROGENASE; ESCHERICHIA-COLI; ELECTRON-DENSITY; PROLINE; REFINEMENT C1 Scripps Res Inst, Joint Ctr Struct Genom, La Jolla, CA 92037 USA. Stanford Univ, Stanford Synchrotron Radiat Lab, Menlo Pk, CA USA. Novartis Res Fdn, Genom Inst, San Diego, CA USA. San Diego Supercomp Ctr, La Jolla, CA USA. Univ Calif San Diego, La Jolla, CA 92093 USA. RP Wilson, IA (reprint author), Scripps Res Inst, Joint Ctr Struct Genom, BCC206,10550 N Torrey Pines Rd, La Jolla, CA 92037 USA. EM wilson@scripps.edu RI Godzik, Adam/A-7279-2009 OI Godzik, Adam/0000-0002-2425-852X FU NIGMS NIH HHS [P50 GM62411] NR 22 TC 10 Z9 10 U1 0 U2 5 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0887-3585 J9 PROTEINS JI Proteins PD JAN 1 PY 2004 VL 54 IS 1 BP 157 EP 161 DI 10.1002/prot.10562 PG 5 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 760HW UT WOS:000187806400015 PM 14705032 ER PT J AU Savchenko, A Skarina, T Evdokimova, E Watson, JD Laskowski, R Arrowsmith, CH Edwards, AM Joachimiak, A Zhang, RG AF Savchenko, A Skarina, T Evdokimova, E Watson, JD Laskowski, R Arrowsmith, CH Edwards, AM Joachimiak, A Zhang, RG TI X-ray crystal structure of CutA from Thermotoga maritima at 1.4 angstrom resolution SO PROTEINS-STRUCTURE FUNCTION AND GENETICS LA English DT Article ID SIGNAL-TRANSDUCTION PROTEINS; COPPER-TRANSPORTING ATPASE; P-II; DOMAIN C1 Univ Toronto, Banting & Best Dept Med Res, Toronto, ON, Canada. Univ Toronto, Ontario Ctr Struct Proteom, Hlth Network, Toronto, ON, Canada. Univ Toronto, Ontario Canc Inst, Toronto, ON, Canada. Univ Toronto, Dept Med Biophys, Toronto, ON, Canada. Univ London Birkbeck Coll, Dept Crystallog, London WC1H 0PP, England. Argonne Natl Lab, Biosci Div, Argonne, IL 60439 USA. Argonne Natl Lab, Struct Biol Ctr, Argonne, IL 60439 USA. RP Edwards, AM (reprint author), Univ Toronto, Banting & Best Dept Med Res, 112 Coll St, Toronto, ON, Canada. EM savchenk@uhnres.utoronto.ca; aled.edwards@utoronto.ca FU NIGMS NIH HHS [GM62414, P50 GM062414, R01 GM026290, P50 GM062414-02, GM26290] NR 21 TC 13 Z9 14 U1 1 U2 1 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0887-3585 J9 PROTEINS JI Proteins PD JAN 1 PY 2004 VL 54 IS 1 BP 162 EP 165 DI 10.1002/prot.10585 PG 4 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 760HW UT WOS:000187806400016 PM 14705033 ER PT J AU Schwarzenbacher, R von Delft, F Canaves, JM Brinen, LS Dai, XP Deacon, AM Elsliger, MA Eshaghi, S Floyd, R Godzik, A Grittini, C Grzechnik, SK Guda, C Jaroszewski, L Karlak, C Klock, HE Koesema, E Kovarik, JS Kreusch, A Kuhn, P Lesley, SA McMullan, D McPhillips, TM Miller, MA Miller, MD Morse, A Moy, K Ouyang, J Page, R Robb, A Rodrigues, K Selby, TL Spraggon, G Stevens, RC van den Bedem, H Velasquez, J Vincent, J Wang, XH West, B Wolf, G Hodgson, KO Wooley, J Wilson, IA AF Schwarzenbacher, R von Delft, F Canaves, JM Brinen, LS Dai, XP Deacon, AM Elsliger, MA Eshaghi, S Floyd, R Godzik, A Grittini, C Grzechnik, SK Guda, C Jaroszewski, L Karlak, C Klock, HE Koesema, E Kovarik, JS Kreusch, A Kuhn, P Lesley, SA McMullan, D McPhillips, TM Miller, MA Miller, MD Morse, A Moy, K Ouyang, J Page, R Robb, A Rodrigues, K Selby, TL Spraggon, G Stevens, RC van den Bedem, H Velasquez, J Vincent, J Wang, XH West, B Wolf, G Hodgson, KO Wooley, J Wilson, IA TI Crystal structure of an iron-containing 1,3-propanediol dehydrogenase (TM0920) from Thermotoga maritima at 1.3 angstrom resolution SO PROTEINS-STRUCTURE FUNCTION AND GENETICS LA English DT Article ID GLYCEROL DEHYDROGENASE; REFINEMENT; CRYSTALLIZATION C1 Scripps Res Inst, JCSG, La Jolla, CA 92037 USA. Stanford Univ, Stanford Synchrotron Radiat Lab, Menlo Pk, CA USA. Novartis Res Fdn, Genom Inst, San Diego, CA USA. San Diego Supercomp Ctr, La Jolla, CA USA. Univ Calif San Diego, La Jolla, CA 92093 USA. Scripps Res Inst, La Jolla, CA USA. RP Wilson, IA (reprint author), Scripps Res Inst, JCSG, BCC206,10550 N Torrey Pines Rd, La Jolla, CA 92037 USA. EM wilson@scripps.edu RI Godzik, Adam/A-7279-2009 OI Godzik, Adam/0000-0002-2425-852X FU NIGMS NIH HHS [P50-GM 62411] NR 17 TC 23 Z9 23 U1 1 U2 22 PU WILEY-LISS PI NEW YORK PA DIV JOHN WILEY & SONS INC, 605 THIRD AVE, NEW YORK, NY 10158-0012 USA SN 0887-3585 J9 PROTEINS JI Proteins PD JAN 1 PY 2004 VL 54 IS 1 BP 174 EP 177 DI 10.1002/prot.10594 PG 4 WC Biochemistry & Molecular Biology; Biophysics SC Biochemistry & Molecular Biology; Biophysics GA 760HW UT WOS:000187806400019 PM 14705036 ER PT S AU Bresson, E Chevassut, O Pointcheval, D AF Bresson, E Chevassut, O Pointcheval, D BE Bao, F Deng, R Zhou, J TI New security results on encrypted key exchange SO PUBLIC KEY CRYPTOGRAPHY - PKC 2004, PROCEEDINGS SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT 7th International Workshop on Theory and Practice in Public Key Cryptography CY MAR 01-04, 2004 CL Singapore, SINGAPORE SP Int Assoc Cryptol Res, Inst InfoComm Res AB Schemes for encrypted key exchange axe designed to provide two entities communicating over a public network, and sharing a (short) password only, with a session key to be used to achieve data integrity and/or message confidentiality. An example of a very efficient and "elegant" scheme for encrypted key exchange considered for standardization by the IEEE P1363 Standard working group is AuthA. This scheme was conjectured secure when the symmetric-encryption primitive is instantiated via either a cipher that closely behaves like an "ideal cipher", or a mask generation function that is the product of the message with a hash of the password. While the security of this scheme in the former case has been recently proven, the latter case was still an open problem. For the first time we prove in this paper that this scheme is secure under the assumptions that the hash function closely behaves like a random oracle and that the computational Diffie-Hellman problem is difficult. Furthermore, since Denial-of-Service (DoS) attacks have become a common threat we enhance AuthA with a mechanism to protect against them. C1 CELAR, Dept Cryptol, F-35174 Bruz, France. Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Ecole Normale Super, Dept Informat, F-75230 Paris, France. RP Bresson, E (reprint author), CELAR, Dept Cryptol, F-35174 Bruz, France. EM Emmanuel.Bresson@polytechnique.org; 0Chevassut@lbl.gov; David.Pointcheval@ens.fr NR 14 TC 80 Z9 88 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-21018-0 J9 LECT NOTES COMPUT SC PY 2004 VL 2947 BP 145 EP 158 PG 14 WC Computer Science, Theory & Methods SC Computer Science GA BY71Y UT WOS:000189446700011 ER PT J AU Beers, TC Prieto, CA Wilhelm, R Yanny, B Newberg, H AF Beers, TC Prieto, CA Wilhelm, R Yanny, B Newberg, H TI Physical parameters of SDSS stars, the nature of the SDSS 'Ring around the Galaxy', and the SEGUE Project SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA LA English DT Article; Proceedings Paper CT 5th Workshop on Galactic Chemodynamics (GCDV) CY JUL 09-11, 2003 CL Swinburne Univ, Melbourne, AUSTRALIA HO Swinburne Univ DE galaxy : chemical abundances; galaxy : halo; galaxy : thick disk ID DIGITAL SKY SURVEY; GIANT STARS; MILKY-WAY; METAL ABUNDANCE; DATA RELEASE; HALO; SPECTROSCOPY; TEMPERATURES; FIELDS; SCALE AB Although the Sloan Digital Sky Survey (SDSS) was primarily envisioned as a tool for understanding the nature of the `high redshift' universe, significant discoveries have already been made at lower redshift, z similar to 0, through studies of stars in the Milky Way galaxy. We have begun to explore the nature of the Milky Way by detailed investigation of the publicly accessible SDSS archive, using spectroscopically targeted stars of special interest (e. g. field horizontal-branch stars, carbon-enhanced stars, and F- and G-type turnoff stars), as well as the stars originally selected as photometric and reddening standards. The first step is to use the SDSS data (which includes independently calibrated five-band photometry and spectrophotometry of individual stars) to derive reliable estimates of the stellar physical parameters, such as T-eff, log g, and [Fe/H], for stars that have been observed to date. Of particular interest, at present, are the stars that are apparently associated with the Monoceros Stream (also known as the SDSS `Ring around the Galaxy'), for which we report derived metallicities. The techniques we have developed for derivation of the physical parameters for these stars are presently being applied to other stars in the SDSS database, including the Early Data Release ( EDR), as well as the first official public database, DR-1. Here we report on the progress made to date, and comment on what might be explored in the near future from a dedicated extension of the SDSS survey (SEGUE) that specifically targets stars in the Milky Way. C1 Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. Univ Texas, Austin, TX 78712 USA. Texas Tech Univ, Dept Phys, Lubbock, TX 79409 USA. Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA. Rensselaer Polytech Inst, Dept Phys & Astron, Troy, NY 12180 USA. RP Beers, TC (reprint author), Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA. EM beers@pa.msu.edu NR 31 TC 15 Z9 15 U1 0 U2 1 PU CSIRO PUBLISHING PI COLLINGWOOD PA 150 OXFORD ST, PO BOX 1139, COLLINGWOOD, VICTORIA 3066, AUSTRALIA SN 1323-3580 J9 PUBL ASTRON SOC AUST JI Publ. Astron. Soc. Aust. PY 2004 VL 21 IS 2 BP 207 EP 211 DI 10.1071/AS04010 PG 5 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 029GY UT WOS:000236550300022 ER PT J AU Drinkwater, MJ Gregg, MD Couch, WJ Ferguson, HC Hilker, M Jones, JB Karick, A Phillipps, S AF Drinkwater, MJ Gregg, MD Couch, WJ Ferguson, HC Hilker, M Jones, JB Karick, A Phillipps, S TI Ultra-compact dwarf galaxies in galaxy clusters SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA LA English DT Article; Proceedings Paper CT Workshop on Structure and Dynamics in the Local Universe in Honor of the 60th Birthday of Brent Tully CY NOV 24-26, 2003 CL Maroubra, AUSTRALIA DE globular clusters : general; galaxies : dwarf; galaxies : formation; galaxies : clusters : general ID FORNAX CLUSTER; GLOBULAR-CLUSTERS; VIRGO CLUSTER; ORIGIN; STARS; LIGHT AB We review the evidence that the ultra-compact dwarf (UCD) galaxies we recently discovered in the Fornax Cluster form a new, previously unknown class of galaxies and we discuss possible scenarios for their formation. We then present recent results that UCDs are also present in the Virgo Cluster, and that there is a much larger than expected population of fainter UCDs in the Fornax Cluster. The size and properties of this population may lead us to revise our original 'galaxy threshing' hypothesis for the formation of UCDs. C1 Univ Queensland, Dept Phys, Brisbane, Qld 4072, Australia. Univ Calif Davis, Dept Phys, Davis, CA 95616 USA. Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA. Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia. Space Telescope Sci Inst, Baltimore, MD 21218 USA. Univ Bonn, Sternwarte, D-53121 Bonn, Germany. Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England. Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia. Univ Bristol, Dept Phys, Astrophys Grp, Bristol BS8 1TL, Avon, England. RP Drinkwater, MJ (reprint author), Univ Queensland, Dept Phys, Brisbane, Qld 4072, Australia. EM mjd@physics.uq.edu.au RI Drinkwater, Michael/A-2201-2008; OI Drinkwater, Michael/0000-0003-4867-0022; Jones, Bryn/0000-0002-4679-5625; Phillipps, Steven/0000-0001-5991-3486 NR 22 TC 43 Z9 43 U1 0 U2 1 PU C S I R O PUBLISHING PI COLLINGWOOD PA 150 OXFORD ST, PO BOX 1139, COLLINGWOOD, VICTORIA 3066, AUSTRALIA SN 1323-3580 J9 PUBL ASTRON SOC AUST JI Publ. Astron. Soc. Aust. PY 2004 VL 21 IS 4 BP 375 EP 378 DI 10.1071/AS04048 PG 4 WC Astronomy & Astrophysics SC Astronomy & Astrophysics GA 876GK UT WOS:000225484500008 ER PT J AU Bowman, JM Xantheas, SS AF Bowman, JM Xantheas, SS TI "Morphing" of ab initio-based interaction potentials to spectroscopic accuracy: Application to Cl-(H2O) SO PURE AND APPLIED CHEMISTRY LA English DT Article; Proceedings Paper CT Annual Meeting of the European-Molecular-Liquids-Group (EMLG) CY SEP 07-15, 2002 CL Rhodes, GREECE SP European Mol Liquids Grp ID ANHARMONIC VIBRATIONAL-STATES; SELF-CONSISTENT-FIELD; WATER CLUSTERS; ENERGY SURFACE; ISOTOPOMERS; MOLECULES; SPECTRA; TESTS; ARGON; H3O+ AB We present anharmonic vibrational calculations for the Cl-(H2O) cluster and their convergence with the n-mode representation of the interaction potential. Extension of this representation up to 4-mode couplings produces results that appear to be converged to within 10 cm(-1) or less relative to the exact 6-mode representation for this system. This methodology, in conjunction with the "morphing" technique, which is based on the scaling of the internal coordinates, provides an effective means of fitting intermolecular potentials to measured vibrational spectra. Application of this approach to the chloride-water interaction produces a revision of a previously developed empirical interaction potential which now reproduces the measured fundamental and first overtone frequencies to within an average absolute deviation of 1.75 cm(-1) in the 4-mode coupling representation. C1 Pacific NW Natl Lab, Div Chem Sci, Richland, WA 99352 USA. Emory Univ, Cherry L Emerson Ctr Sci Computat, Atlanta, GA 30322 USA. Emory Univ, Dept Chem, Atlanta, GA 30322 USA. RP Xantheas, SS (reprint author), Pacific NW Natl Lab, Div Chem Sci, POB 999,MS K1-83, Richland, WA 99352 USA. RI Xantheas, Sotiris/L-1239-2015 NR 26 TC 16 Z9 16 U1 1 U2 2 PU INT UNION PURE APPLIED CHEMISTRY PI RES TRIANGLE PK PA 104 TW ALEXANDER DR, PO BOX 13757, RES TRIANGLE PK, NC 27709-3757 USA SN 0033-4545 J9 PURE APPL CHEM JI Pure Appl. Chem. PD JAN PY 2004 VL 76 IS 1 BP 29 EP 35 DI 10.1351/pac200476010029 PG 7 WC Chemistry, Multidisciplinary SC Chemistry GA 780AV UT WOS:000189349400005 ER PT B AU Lamoreaux, SK AF Lamoreaux, SK BE Milton, KA TI Demonstration of the Casimir force with a torsion pendulum SO QFEXT'03: QUANTUM FIELD THEORY UNDER THE INFLUENCE OF EXTERNAL CONDITIONS, PROCEEDINGS LA English DT Proceedings Paper CT 6th Workshop on Quantum Field Theory Under the Influence of External Conditions CY SEP 15-19, 2003 CL Univ Oklahoma, Norman, OK HO Univ Oklahoma ID MU-M RANGE AB My experimental measurement of the Casimir force by use of a torsion pendulum (1,2) was done quite a long time ago now, but remains in current interest. A recent paper, (3) in which simultaneous consideration of the thermal and finite conductivity corrections to the Casimir force between metal plates is considered, indicates a significant deviation from my experimental result. There has been a lively discussion of this theoretical result in the literature. Although my experiment was intended as a demonstration and as such was not subject to the usual battery of systematics tests, the deviation between the theory (3) and the experimental results is really too large to be explained by plausible experimental errors (not to say that the implausible isn't a possibility!). I will present here discussions of the possible effects due to one surface being spherical and of the low-frequency validity of the assumption that the field interaction with the plates can be described by a dielectric model. Further theoretical support towards calculations that fully models the experiment are warranted. C1 Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA. RP Lamoreaux, SK (reprint author), Los Alamos Natl Lab, Div Phys, POB 1663, Los Alamos, NM 87545 USA. NR 14 TC 0 Z9 0 U1 0 U2 0 PU RINTON PRESS, INC PI PRINCETON PA 565 EDMUND TERRACE, PRINCETON, NJ 07652 USA BN 1-58949-033-9 PY 2004 BP 1 EP 4 PG 4 WC Physics, Particles & Fields; Physics, Mathematical SC Physics GA BAX39 UT WOS:000224078900001 ER PT B AU Roach, D AF Roach, D BE Mcnulty, GJ TI Use of distributed sensor systems to monitor structural integrity in real-time SO QUALITY, RELIABILITY, AND MAINTENANCE LA English DT Proceedings Paper CT 5th International Conference on Quality, Reliability and Maintenance CY APR 01-02, 2004 CL Univ Oxford, St Edmund Hall, Oxford, ENGLAND SP Inst Mech Engineers HO Univ Oxford, St Edmund Hall AB Health monitoring of structures is a major concern of the engineering community. This need is intensified in the case of aging aerospace and civil structures many of which are operating well beyond their initial design lives. The current damage tolerance design philosophy requires that a structure be capable of sustaining small damage without failure and that an inspection program be instituted to detect such flaws before they grow to a critical length. This has placed greater demands on the development and application of on-board sensors and associated health monitoring techniques. Successful field testing has quantified the performance of real-time, health monitoring systems and has highlighted their potential use in routine maintenance activities. C1 Sandia Natl Labs, Livermore, CA 94550 USA. RP Roach, D (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA. NR 3 TC 1 Z9 1 U1 0 U2 0 PU PROFESSIONAL ENGINEERING PUBLISHING LTD PI WESTMINISTER PA 1 BIRDCAGE WALK, WESTMINISTER SW1H 9JJ, ENGLAND BN 1-86058-440-3 PY 2004 BP 311 EP 314 PG 4 WC Engineering, Multidisciplinary SC Engineering GA BAC38 UT WOS:000221524300073 ER PT B AU Hartemann, FV Brown, WJ Anderson, SG Barty, CPJ Betts, SM Booth, R Crane, JK Cross, RR Fittinghoff, DN Gibson, DJ Kuba, J Rupp, B Tremaine, AM Springer, PT AF Hartemann, FV Brown, WJ Anderson, SG Barty, CPJ Betts, SM Booth, R Crane, JK Cross, RR Fittinghoff, DN Gibson, DJ Kuba, J Rupp, B Tremaine, AM Springer, PT BE Chen, P Reil, K TI Compton scattering and its applications: The pleiades femtosecond x-ray source at LLNL SO QUANTUM ASPECTS OF BEAM PHYSICS LA English DT Proceedings Paper CT Joint 28th ICFA Advanced Beam Dynamics and Advanced and Novel Accelerators Workshop on Quantum Aspects of Beam Physics CY JAN 07-11, 2003 CL Hiroshima, JAPAN ID NONLINEAR THOMSON SCATTERING; FREE-ELECTRON LASER; RELATIVISTIC ELECTRONS; SYNCHROTRON-RADIATION; STRUCTURAL DYNAMICS; CLASSICAL-THEORY; DIFFRACTION; PULSES; VACUUM; BEAMS AB Remarkable developments in critical technologies including terawatt-class lasers using chirped-pulse amplification, high brightness photoinjectors, high-gradient accelerators, and superconducting linacs make it possible to design and operate compact, tunable, subpicosecond Compton scattering x-ray sources with a wide variety of applications. In such novel radiation sources, the collision between a ferntosecond laser pulse and a low emittance relativistic electron bunch in a small (mu m(3)) interaction volume produces Doppler-upshifted scattered photons with unique characteristics: the energy is tunable in the 5-500 keV range, the angular divergence of the beam is small (mrad), and the pulses are ultrashort (10 fs - 10 ps). Two main paths are currently being followed in laboratories worldwide: high peak brightness, using ultrahigh intensity ferntosecond lasers at modest repetition rates, and high average brightness, using superconducting linac and high average power laser technology at MHz repetition rates. Targeted applications range from x-ray protein crystallography and high contrast medical imaging to ferntosecond pump-probe and diffraction experiments. More exotic uses of such sources include the gamma-gamma collider, NIF backlighting, nonlinear Compton scattering, and high-field QED. Theoretical considerations and experimental results will be discussed within this context. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Hartemann, FV (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA. NR 69 TC 0 Z9 0 U1 0 U2 2 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA PO BOX 128 FARRER RD, SINGAPORE 9128, SINGAPORE BN 981-256-069-6 PY 2004 BP 49 EP 62 DI 10.1142/9789812702333_0005 PG 14 WC Astronomy & Astrophysics; Physics, Atomic, Molecular & Chemical; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BCL63 UT WOS:000229929700005 ER PT B AU Takahashi, H AF Takahashi, H BE Chen, P Reil, K TI Quantum aspects of super-strong field interactions SO QUANTUM ASPECTS OF BEAM PHYSICS LA English DT Proceedings Paper CT Joint 28th ICFA Advanced Beam Dynamics and Advanced and Novel Accelerators Workshop on Quantum Aspects of Beam Physics CY JAN 07-11, 2003 CL Hiroshima, JAPAN ID COHERENT; STATES AB Quantum aspect of interaction between high intensity laser and electron plasma has been studied in point of view of coherent state formalism In the previous paper, I present a theoretical foundation based on quantum-mechanical- and coherent-state-formalism for analyzing the interactions between the high-intensity laser and electron plasma in a many electron system. In this paper the group theoretical methods are studied for dealing with many modes created in the target under the super strong laser irradiation. The methodology based on the exponential Hilbert space approach are studied for analyzing the modes interacting system where non linear mode interaction becomes prominent over the linear space analysis. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. RP Takahashi, H (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. NR 10 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 981-256-069-6 PY 2004 BP 232 EP 238 DI 10.1142/9789812702333_0024 PG 7 WC Astronomy & Astrophysics; Physics, Atomic, Molecular & Chemical; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BCL63 UT WOS:000229929700024 ER PT B AU Irwin, J Shmakova, M AF Irwin, J Shmakova, M BE Chen, P Reil, K TI Cosmological final focus systems SO QUANTUM ASPECTS OF BEAM PHYSICS LA English DT Proceedings Paper CT Joint 28th ICFA Advanced Beam Dynamics and Advanced and Novel Accelerators Workshop on Quantum Aspects of Beam Physics CY JAN 07-11, 2003 CL Hiroshima, JAPAN AB We develop the many striking parallels between the dynamics of light streams from distant galaxies and particle beams in accelerator final focus systems. Notably the deflections of light by mass clumps are identical to the kicks arising from the long-range beam-beam interactions of two counter-rotating particle beams (known as parasitic crossings). These deflections have sextupolar as well as quadrupolar components. We estimate the strength of such distortions for a variety of circumstances and argue that the sextupolar distortions from clumping within clusters may be observable. This possibility is enhanced by the facts that i) the sextupolar distortions of background galaxies is a factor of 5 smaller than the quadrupolar distortion, ii) the angular orientation of the sextupolar and quadrupolar distortions from a mass distribution would be correlated, appearing as a slightly curved image, iii) these effects should be spatially clumped on the sky. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Irwin, J (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. NR 8 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 981-256-069-6 PY 2004 BP 263 EP 271 DI 10.1142/9789812702333_0027 PG 9 WC Astronomy & Astrophysics; Physics, Atomic, Molecular & Chemical; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BCL63 UT WOS:000229929700027 ER PT B AU Chao, A AF Chao, A BE Chen, P Reil, K TI Dspontaneous gravitational instability of star distribution in a nonrotating galaxy SO QUANTUM ASPECTS OF BEAM PHYSICS LA English DT Proceedings Paper CT Joint 28th ICFA Advanced Beam Dynamics and Advanced and Novel Accelerators Workshop on Quantum Aspects of Beam Physics CY JAN 07-11, 2003 CL Hiroshima, JAPAN AB Gravitational instability of the distribution of stars in a galaxy is a well-known phenomenon in astrophysics. This work is a preliminary attempt to analyze this effect using the standard tools developed in accelerator physics. The result is first applied to nonrotating gallaxies with spherical and planar symmetries. Extensions to rotating galaxies are not studied here. C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RP Chao, A (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA. NR 4 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 981-256-069-6 PY 2004 BP 272 EP 286 DI 10.1142/9789812702333_0028 PG 15 WC Astronomy & Astrophysics; Physics, Atomic, Molecular & Chemical; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BCL63 UT WOS:000229929700028 ER PT B AU Chen, PS AF Chen, PS BE Chen, P Reil, K TI Generalized uncertainty principle and dark matter SO QUANTUM ASPECTS OF BEAM PHYSICS LA English DT Proceedings Paper CT Joint 28th ICFA Advanced Beam Dynamics and Advanced and Novel Accelerators Workshop on Quantum Aspects of Beam Physics CY JAN 07-11, 2003 CL Hiroshima, JAPAN ID BLACK-HOLE RELICS; HYBRID INFLATION; QUANTUM-GRAVITY; MASS; PERTURBATION; COSMOLOGY; UNIVERSE AB There have been proposals that primordial black hole remnants (BHRs) are the dark matter, but the idea is somewhat vague. Recently we argued that the generalized uncertainty principle (CUP) may prevent black holes from evaporating completely, in a similar way that the standard uncertainty principle prevents the hydrogen atom from collapsing. We further noted that the hybrid inflation model provides a plausible mechanism for production of large numbers of small black holes. Combining these we suggested that the dark matter might be composed of Planck-size BHRs. In this paper we briefly review these arguments, and discuss the reheating temperature as a result of black hole evaporation. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Chen, PS (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. NR 34 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 981-256-069-6 PY 2004 BP 315 EP 321 DI 10.1142/9789812702333_0032 PG 7 WC Astronomy & Astrophysics; Physics, Atomic, Molecular & Chemical; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BCL63 UT WOS:000229929700032 ER PT B AU Chen, PS Tajima, T Takahashi, Y AF Chen, PS Tajima, T Takahashi, Y BE Chen, P Reil, K TI Cosmic plasma wakefield acceleration SO QUANTUM ASPECTS OF BEAM PHYSICS LA English DT Proceedings Paper CT Joint 28th ICFA Advanced Beam Dynamics and Advanced and Novel Accelerators Workshop on Quantum Aspects of Beam Physics CY JAN 07-11, 2003 CL Hiroshima, JAPAN ID ZATSEPIN-KUZMIN CUTOFF; RAY ENERGY-SPECTRUM; PARTICLE ACCELERATION; NEUTRINOS; MECHANISM; FIREBALLS AB Recently we proposed a new cosmic acceleration mechanism(1) which was based on the wakefields excited by the Alfven shocks in a relativistically flowing plasma. In this paper we include some omitted details, and show that there exists a threshold condition for transparency below which the accelerating particle is collision-free and suffers little energy loss in the plasma medium. The stochastic encounters of the random accelerating-decelerating phases results in a power-law energy spectrum: f(epsilon) proportional to 1/epsilon(2). As an example, we discuss the possible production of super-GZK ultra high energy cosmic rays (UHECR) in the atmosphere of gamma ray bursts. The estimated event rate in our model agrees with that from UHECR observations. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Chen, PS (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. NR 38 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 981-256-069-6 PY 2004 BP 384 EP 396 DI 10.1142/9789812702333_0039 PG 13 WC Astronomy & Astrophysics; Physics, Atomic, Molecular & Chemical; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BCL63 UT WOS:000229929700039 ER PT B AU Ng, JST AF Ng, JST BE Chen, P Reil, K TI Accelerator experiments for astrophysics SO QUANTUM ASPECTS OF BEAM PHYSICS LA English DT Proceedings Paper CT Joint 28th ICFA Advanced Beam Dynamics and Advanced and Novel Accelerators Workshop on Quantum Aspects of Beam Physics CY JAN 07-11, 2003 CL Hiroshima, JAPAN ID ACTIVE GALACTIC NUCLEI; COSMIC-RAY; INTENSE LASERS; ENERGY; RADIATION; SPECTRUM; SUPPRESSION; MCG-6-30-15; CONVERSION; EMISSION AB Many recent discoveries in astrophysics involve phenomena that are highly complex. Carefully designed experiments, together with sophisticated computer Simulations, are required to gain insights into the underlying physics. We show that particle accelerators axe unique tools in this area of research, by providing precision calibration data and by creating extreme experimental conditions relevant for astrophysics. In this paper we discuss laboratory experiments that can be carried out at the Stanford Linear Accelerator Center and implications for astrophysics. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Accelerator Res Dept A, Stanford, CA 94309 USA. RP Ng, JST (reprint author), Stanford Univ, Stanford Linear Accelerator Ctr, Accelerator Res Dept A, MS 26,POB 20450, Stanford, CA 94309 USA. NR 38 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 981-256-069-6 PY 2004 BP 397 EP 410 DI 10.1142/9789812702333_0040 PG 14 WC Astronomy & Astrophysics; Physics, Atomic, Molecular & Chemical; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BCL63 UT WOS:000229929700040 ER PT B AU Colby, ER AF Colby, ER BE Chen, P Reil, K TI Critical issues for vacuum laser acceleration SO QUANTUM ASPECTS OF BEAM PHYSICS LA English DT Proceedings Paper CT Joint 28th ICFA Advanced Beam Dynamics and Advanced and Novel Accelerators Workshop on Quantum Aspects of Beam Physics CY JAN 07-11, 2003 CL Hiroshima, JAPAN ID ELECTRONS; SCATTERING AB Recent technological progress in lasers has renewed interest in applying high power lasers to accelerate charged particles. Outstanding gains in efficiency and power, and the first demonstration of optical phase-locking have moved the laser closer to competitive standing with microwave vacuum tubes as power sources for accelerators. We explore some of the questions that will determine the suitability of both low-field (a(0) << 1) and high-field (a(0) > 1) acceleration methods, and identify some of the challenges ahead. Possible applications include a laser-driven linear collider and novel, compact particle and radiation sources, each with its own performance requirements. C1 Stanford Linear Accelerator Ctr, Menlo Pk, CA 94025 USA. RP Colby, ER (reprint author), Stanford Linear Accelerator Ctr, 2575 Sand Hill Rd MS 07, Menlo Pk, CA 94025 USA. EM ecolby@slac.stanford.edu NR 22 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 981-256-069-6 PY 2004 BP 455 EP 461 DI 10.1142/9789812702333_0044 PG 7 WC Astronomy & Astrophysics; Physics, Atomic, Molecular & Chemical; Physics, Particles & Fields SC Astronomy & Astrophysics; Physics GA BCL63 UT WOS:000229929700044 ER PT S AU Kim, YH Grice, WP AF Kim, YH Grice, WP BE Meyers, RE Shih, Y TI Observation of correlated-photon statistics using a single detector SO QUANTUM COMMUNICATIONS AND QUANTUM IMAGING SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Quantum Communications and Quantum Imaging CY AUG 06-08, 2003 CL San Diego, CA SP SPIE DE quantum entanglement; spontaneous parametric down conversion; photon statistics ID 2-PHOTON INTERFERENCE EXPERIMENT; PARAMETRIC DOWN-CONVERSION; INDISTINGUISHABILITY; COHERENCE AB Two-photon interference effects and correlated-photon statistics have traditionally been observed in the coincidence detection rate between two detectors. Here, we report observations of correlated-photon statistics, which are due to two-photon entanglement and interference, in the single-photon detection rate. The observed effects are explained by considering all possible photon number states that reach the detector, rather than considering just the state post-selected by the coincidence circuit. C1 Oak Ridge Natl Lab, Ctr Engn Sci Adv Res, Comp Sci & Math Div, Oak Ridge, TN 37831 USA. RP Kim, YH (reprint author), Oak Ridge Natl Lab, Ctr Engn Sci Adv Res, Comp Sci & Math Div, Oak Ridge, TN 37831 USA. RI Grice, Warren/L-8466-2013; OI Grice, Warren/0000-0003-4266-4692 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 0-8194-5034-0 J9 P SOC PHOTO-OPT INS PY 2004 VL 5161 BP 1 EP 8 DI 10.1117/12.504540 PG 8 WC Optics; Imaging Science & Photographic Technology SC Optics; Imaging Science & Photographic Technology GA BY69U UT WOS:000189441500001 ER PT S AU Lawes, G Naughton, B Clark, DR Ramirez, AP Seshadri, R AF Lawes, G Naughton, B Clark, DR Ramirez, AP Seshadri, R BE GuyotSionnest, P Mattoussi, H Wang, ZL TI Magnetic characterization of CoFe2O4 nanoparticles SO QUANTUM DOTS, NANOPARTICLES AND NANOWIRES SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Quantum Dots, Nanoparticles and Nanowires held at the 2003 MRS Fall Meeting CY DEC 01-05, 2003 CL Boston, MA SP Mat Res Soc, Evident Technol, USN, Off Naval Res ID COBALT FERRITE; PARTICLES C1 Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Lawes, G (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87544 USA. NR 8 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 1-55899-727-X J9 MATER RES SOC SYMP P PY 2004 VL 789 BP 183 EP 188 PG 6 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Materials Science, Characterization & Testing; Optics SC Engineering; Materials Science; Optics GA BAH07 UT WOS:000222179300027 ER PT S AU Leon, FR Zaitseva, N Gerion, D Huser, T Krol, D AF Leon, FR Zaitseva, N Gerion, D Huser, T Krol, D BE GuyotSionnest, P Mattoussi, H Wang, ZL TI Optical properties of CdSe nanoparticle assemblies SO QUANTUM DOTS, NANOPARTICLES AND NANOWIRES SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Quantum Dots, Nanoparticles and Nanowires held at the 2003 MRS Fall Meeting CY DEC 01-05, 2003 CL Boston, MA SP Mat Res Soc, Evident Technol, USN, Off Naval Res ID MONODISPERSE NANOCRYSTALS; GROWTH AB We report on three-dimensional fluorescence imaging of micron-size faceted crystals precipitated from solutions of CdSe nanocrystals. Such crystals have previously been suggested to be superlattices of CdSe quantum dots [1,2]. Possible applications for these materials include their use in optical and optoelectronic devices. The micron-size crystals were grown by slow evaporation from toluene solutions of CdSe nanocrystals in the range of 3-6 nm, produced by traditional wet-chemistry techniques. By using a confocal microscope with laser illumination, three-dimensional raster-scanning and synchronized hyper-spectral detection, we have generated spatial profiles of the fluorescence emission intensity and spectrum. The fluorescence data of the micro-crystals were compared with spectra of individual nanocrystals obtained from the same solution. The results do not support the assertion that these microcrystals consist of CdSe superlattices. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Leon, FR (reprint author), Lawrence Livermore Natl Lab, 7000 E Ave, Livermore, CA 94550 USA. NR 5 TC 0 Z9 0 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-727-X J9 MATER RES SOC SYMP P PY 2004 VL 789 BP 245 EP 250 PG 6 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Materials Science, Characterization & Testing; Optics SC Engineering; Materials Science; Optics GA BAH07 UT WOS:000222179300036 ER PT S AU Benkstein, KD Kopidakis, N de Lagemaat, JV Frank, AJ AF Benkstein, KD Kopidakis, N de Lagemaat, JV Frank, AJ BE GuyotSionnest, P Mattoussi, H Wang, ZL TI Influence of the network geometry on electron transport in nanoparticle networks SO QUANTUM DOTS, NANOPARTICLES AND NANOWIRES SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Quantum Dots, Nanoparticles and Nanowires held at the 2003 MRS Fall Meeting CY DEC 01-05, 2003 CL Boston, MA SP Mat Res Soc, Evident Technol, USN, Off Naval Res ID TIO2 SOLAR-CELLS; MODULATED PHOTOCURRENT SPECTROSCOPY; FILMS AB Computer simulations are applied to understand the influence of network geometry on the electron transport dynamics in random nanoparticle networks, and the predicted results are compared with those measured in one class of random nanoparticle networks: dye-sensitized nanocrystalline TiO2 solar cells. The model is applicable to all classes of random nanoparticle networks, such as highly disordered quantum dot arrays. The random nanoparticle networks are simulated by the step-wise condensation of a diffusion-limited aggregate. The fractal dimension of the nanoparticle films was estimated from the simulations to be 2.28, which is in quantitative agreement with gas-sorption measurements of TiO2 nanoparticle films. Electron transport on the computer-generated networks is simulated by random walk. The experimental measurements and random-walk simulations are found to be in quantitative agreement. For both a power-law dependence of the electron diffusion coefficient D on the filin porosity P is found as described by the relation: D proportional to \P-P-c\(mu). This power-law relation can also be derived from percolation theory, although only qualitatively. The critical porosity P, (percolation threshold) and the conductivity exponent mu are found to be 0.76 +/- 0.01 and 0.82 +/- 0.05, respectively. It is estimated that during their respective transit through 50 and 75% porous 10-mum thick films as employed in the dye-cell, the average number of particles visited by electrons increases by 10-fold, from 10(6) to 10(7). C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Benkstein, KD (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 11 TC 5 Z9 5 U1 1 U2 3 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-727-X J9 MATER RES SOC SYMP P PY 2004 VL 789 BP 325 EP 330 PG 6 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Materials Science, Characterization & Testing; Optics SC Engineering; Materials Science; Optics GA BAH07 UT WOS:000222179300049 ER PT S AU Kopidakis, N Benkstein, KD van de Lagemaat, J Frank, AJ AF Kopidakis, N Benkstein, KD van de Lagemaat, J Frank, AJ BE GuyotSionnest, P Mattoussi, H Wang, ZL TI Diffusion-limited recombination in dye-sensitized TiO2 solar cells SO QUANTUM DOTS, NANOPARTICLES AND NANOWIRES SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Quantum Dots, Nanoparticles and Nanowires held at the 2003 MRS Fall Meeting CY DEC 01-05, 2003 CL Boston, MA SP Mat Res Soc, Evident Technol, USN, Off Naval Res ID ELECTRON-TRANSPORT; NANOPOROUS TIO2; PHOTOCARRIERS; EFFICIENCY; FILMS AB The effect of doping on the electron transport dynamics and recombination kinetics in dye-sensitized solar cells was investigated. A simple electrochemical method was developed to dope TiO2 nanoparticle films with Li. Increasing the doping levels is found to slow electron diffusion. The electron diffusion time exhibits a light intensity dependence at all doping levels consistent with a multiple electron-trapping model involving native and doping-induced traps. Importantly, the diffusion time and recombination lifetime of photocarriers are observed to increase in unison with increased doping. This is the first observation that electron diffusion limits recombination with the redox electrolyte under normal working conditions of the dye cell. A model is presented that accounts for the observation. The implications of this mechanism on cell performance are also discussed. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Kopidakis, N (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. NR 17 TC 0 Z9 0 U1 1 U2 4 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-727-X J9 MATER RES SOC SYMP P PY 2004 VL 789 BP 339 EP 344 PG 6 WC Engineering, Electrical & Electronic; Materials Science, Multidisciplinary; Materials Science, Characterization & Testing; Optics SC Engineering; Materials Science; Optics GA BAH07 UT WOS:000222179300051 ER PT S AU Benioff, P AF Benioff, P BE Ozhigov, YL TI The theory experiment connection: Rn space and inflationary cosmology SO Quantum Informatics 2004 SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT 2nd International Symposium on Quantum Informatics CY OCT 05-07, 2004 CL Moscow, RUSSIA SP Inst Phys & Technol, Moscow State Univ, SPIE, Russia Chapter, Russian Fdn Fundamental Res DE measurement hierarchy; string numbers; scale invariant space time; inflationary cosmology ID UNIVERSE; FLATNESS; HORIZON AB Based on a discussion of the theory experiment connection, it is proposed to tighten the connection by replacing the real and complex number basis of physical theories by sets R-n, C-n of length m finite binary string numbers. Here n = n(t) will be cosmological time dependent. The form of the numbers in R-n is based on the infinite hierarchy of 2n figure outputs from measurements of any physical quantity with an infinite range (distance, energy, etc.). A space and time based on these numbers is described. It corresponds to an infinite sequence of spherical scale sections R-n,R-(e) under bar ((e) under bar an integer). Each section has the same number of points but the size increases exponentially with increasing (e) over bar. The sections converge towards an origin which is a space singularity. Iteration of a basic order preserving transformation, F < or its inverse shows exponential expansion or contraction of the space with the origin as a source or sink of space points. The suitability of R-n space as a framework for inflationary cosmology is based on a constant iteration rate for F < and time dependent scale factors (e) under bar and n n(t). The time dependences restrict all space initially to a region of scale sections Rn-0,Rn-<(e)under bar> with n(0) (small) and <(e)under bar> <= (e) under bar (0) (negative). Inflation, which occurs naturally, is stopped at a time when all points in the outermost Delta scale sections are expanding away from the origin at velocities > c. Then n increases to n(I) > n(0) where n(I) is such that the outermost Delta scale sections of R-n0 space are contained in the scale section Rn-I,Rn-0 of R-nI space. This is needed if Rn-I,(0) space is to be similar to the usual R space. Hubble expansion and the redshift are accounted for by a continuing slow increase in n. Comparison with experimental data suggests that the rate of increase must be at least one n unit every 30-60 million years. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Benioff, P (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. NR 12 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 0-8194-5827-9 J9 P SOC PHOTO-OPT INS PY 2004 VL 5833 BP 1 EP 14 DI 10.1117/12.620296 PG 14 WC Instruments & Instrumentation; Optics; Physics, Condensed Matter SC Instruments & Instrumentation; Optics; Physics GA BCU13 UT WOS:000231237300001 ER PT S AU Anheier, NC Allen, PJ Myers, TL AF Anheier, NC Allen, PJ Myers, TL BE Razeghi, M Brown, GJ TI Advanced quantum cascade laser transmitter architectures and infrared photonics development SO QUANTUM SENSING AND NANOPHOTONIC DEVICES SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Quantum Sensing and Nanophotonic Devices CY JAN 25-29, 2004 CL San Jose, CA SP SPIE DE quantum cascade lasers; chalcogenide glass; waveguides; diffraction gratings; waveguide couplers ID CONTINUOUS-WAVE OPERATION; AS2S3 GLASS; CHALCOGENIDE GLASSES; ROOM-TEMPERATURE; BRAGG GRATINGS; THIN-FILMS; MU-M; GUIDES; PHOTOEXPANSION; FABRICATION AB Quantum cascade lasers (QCLs) provide a viable infrared laser source for a new class of laser transmitters capable of meeting the performance requirements for a variety of national security and civilian applications. The high output power, small size, and superb stability and modulation characteristics of QCLs make them amenable for integration as transmitters into ultra-sensitive, ultra-selective point sampling and remote short-range chemical sensors. This paper reports on the current development in infrared photonics that provides a pathway for QCL transmitter miniaturization. This research has produced infrared waveguide-based optical components in chalcogenide glass using both direct-laser writing and holographic exposure techniques. We discuss here the design and fabrication concepts and capabilities required to produce integrated waveguides, waveguide couplers, and other photonic devices. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Anheier, NC (reprint author), Pacific NW Natl Lab, POB 999, Richland, WA 99352 USA. NR 22 TC 0 Z9 0 U1 1 U2 1 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5267-X J9 P SOC PHOTO-OPT INS PY 2004 VL 5359 BP 203 EP 209 DI 10.1117/12.517240 PG 7 WC Materials Science, Multidisciplinary; Optics; Physics, Condensed Matter SC Materials Science; Optics; Physics GA BAQ21 UT WOS:000223199200019 ER PT S AU Sundaram, SK Johnson, BR Schweiger, MJ Martinez, JE Riley, BJ Saraf, LV Anheier, NC Allen, PJ Schultz, JF AF Sundaram, SK Johnson, BR Schweiger, MJ Martinez, JE Riley, BJ Saraf, LV Anheier, NC Allen, PJ Schultz, JF BE Razeghi, M Brown, GJ TI Chalcogenide glasses and structures for quantum sensing SO QUANTUM SENSING AND NANOPHOTONIC DEVICES SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Quantum Sensing and Nanophotonic Devices CY JAN 25-29, 2004 CL San Jose, CA SP SPIE DE chalcogenide; glass formation; microstructure; laser writing; lithography; holography ID AS2S3 GLASS; OPTICAL FIBERS; ARSENIC SULFIDE; DEPENDENCE; LIGHT AB Chalcogenide glasses are formed by combining chalcogen elements with IV-V elements. Among the family of glasses, As2S3, and As2Se3 are important infrared (IR) transparent materials for a variety of applications such as IR sensors, waveguides, and photonic crystals. With the promise of accessibility to any wavelengths between 3.5 and 16 mum using tunable quantum cascade lasers (QCL) and chalcogenides with IR properties that can be compositionally adjusted, ultrasensitive, solid-state, photonic-based chemical sensing in mid-wave IR region is now possible. Pacific Northwest National Laboratory (PNNL) has been developing quantum cascade lasers (QCLs), chalcogenides, and all other components for an integrated approach to chemical sensing. Significant progress has been made in glass formation and fabrication of different structures at PNNL. Three different glass-forming systems, As-S, As-S-Se, and As-S-Ag have been examined for this application. Purification of constituents from contaminants and thermal history are two major issues in obtaining defect-free glasses. We have shown how the optical proper-ties can be systematically modified by changing the chemistry in As-S-Se system. Different fabrication techniques need to be employed for different geometries and structures. We have successfully fabricated periodic arrays and straight waveguides using laser-writing and characterized the structures. Wet-chemical lithography has been extended to chalcogenides and challenges identified. We have also demonstrated holographic recording or diffraction gratings in chalcogenides. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Sundaram, SK (reprint author), Pacific NW Natl Lab, POB 999,MSIN K6-24, Richland, WA 99352 USA. OI Riley, Brian/0000-0002-7745-6730 NR 35 TC 11 Z9 11 U1 1 U2 4 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5267-X J9 P SOC PHOTO-OPT INS PY 2004 VL 5359 BP 234 EP 245 DI 10.1117/12.517235 PG 12 WC Materials Science, Multidisciplinary; Optics; Physics, Condensed Matter SC Materials Science; Optics; Physics GA BAQ21 UT WOS:000223199200023 ER PT S AU Exarhos, GJ Ferris, KF AF Exarhos, GJ Ferris, KF BE Razeghi, M Brown, GJ TI Optical limiting by index-matched phase-segregated mixtures SO QUANTUM SENSING AND NANOPHOTONIC DEVICES SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Quantum Sensing and Nanophotonic Devices CY JAN 25-29, 2004 CL San Jose, CA SP SPIE DE Christiansen filter; light scattering; optical limiting; refractive index; z-scan ID LOCAL ELECTRIC-FIELDS; CHRISTIANSEN FILTER; LIGHT-SCATTERING; T-MATRIX; HOMOGENEITY; ENHANCEMENT; PARTICLES; GLASS; MEDIA AB The nonlinear optical response for index-matched, non-absorbing immiscible phases (liquid-solid, liquid-liquid, solid-solid) has been determined by means of open aperture z-scan measurements. In mixtures where one constituent shows a relatively high optical nonlinearity, rapid and reversible transformation to a light-scattering state is observed under conditions where a critical incident light fluence is exceeded. This passive broadband response is induced by a transient change in the dispersive part of the refractive index, and is based upon the Christiansen-Shelyubskii filter that at one time was used as a means to monitor the temperature of glass melts. Modeling studies are used to simulate scattering intensities in such textured composites as a function of composition, microstructure, and constituent optical properties. Results provide a rational approach to the selection of materials for use in these limiters. Challenges to preparing dispersed phase mixtures and their response to 532 nm nanosecond pulsed laser irradiation are described. C1 Pacific NW Natl Lab, Div Mat, Richland, WA USA. RP Exarhos, GJ (reprint author), Pacific NW Natl Lab, Div Mat, Richland, WA USA. NR 40 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 0-8194-5267-X J9 P SOC PHOTO-OPT INS PY 2004 VL 5359 BP 309 EP 323 DI 10.1117/12.516442 PG 15 WC Materials Science, Multidisciplinary; Optics; Physics, Condensed Matter SC Materials Science; Optics; Physics GA BAQ21 UT WOS:000223199200031 ER PT B AU Anastasiou, C Dixon, LJ Bern, Z Kosower, DA AF Anastasiou, C Dixon, LJ Bern, Z Kosower, DA BE Argyres, PC Hodges, TJ Mansouri, F Scanio, JJ Suranyi, P Wijewardhana, LCR TI Cross-order relations in N=4 supersymmetric gauge theories SO QUANTUM THEORY AND SYMMETRIES LA English DT Proceedings Paper CT 3rd International Symposium on Quantum Theory and Symmetries CY SEP 10-14, 2003 CL Univ Cincinnati, Cincinnati, OH HO Univ Cincinnati ID YANG-MILLS THEORY; SPLITTING AMPLITUDES; MASS SINGULARITIES; COLLINEAR LIMITS; GLUON AMPLITUDES; BEHAVIOR; SUPERGRAVITY; PROGRESS; BOX AB The anti-de Sitter/conformal field theory duality conjecture raises the question of how the perturbative expansion in the conformal field theory can resum to a simple function. We exhibit a relation between the one-loop and two-loop amplitudes whose generalization to higher-point and higher-loop amplitudes would answer this question. We also provide evidence for the first of these generalizations. C1 Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. RP Stanford Univ, Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA. NR 39 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 981-256-068-8 PY 2004 BP 275 EP 280 DI 10.1142/9789812702340_0032 PG 6 WC Physics, Multidisciplinary SC Physics GA BCL70 UT WOS:000229932300032 ER PT B AU Tatar, R AF Tatar, R BE Argyres, PC Hodges, TJ Mansouri, F Scanio, JJ Suranyi, P Wijewardhana, LCR TI Geometric transitions, matrix models and effective field theories SO QUANTUM THEORY AND SYMMETRIES LA English DT Proceedings Paper CT 3rd International Symposium on Quantum Theory and Symmetries CY SEP 10-14, 2003 CL Univ Cincinnati, Cincinnati, OH HO Univ Cincinnati ID TOPOLOGICAL STRINGS; LARGE N AB We discuss the geometric engineering and large N transition for a supersymmetric U(N) chiral gauge theory with one adjoint, one conjugate symmetric, one antisymmetric and eight fundamental chiral multiplets. The IIB realization involves an orientifold of a non-compact Calabi-Yau. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA. RP Tatar, R (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Theoret Phys Grp, Berkeley, CA 94720 USA. NR 10 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 981-256-068-8 PY 2004 BP 424 EP 430 DI 10.1142/9789812702340_0049 PG 7 WC Physics, Multidisciplinary SC Physics GA BCL70 UT WOS:000229932300049 ER PT S AU Sordelet, D Yang, XY Rozhkova, E Besser, M Kramer, M AF Sordelet, D Yang, XY Rozhkova, E Besser, M Kramer, M BE BelinFerre, E Feuerbacher, M Ishii, Y Sordelet, DJ TI Effects of oxygen on meta-stable phase formation in Zr80Pt20 melt spun ribbons SO QUASICRYSTALS 2003-PREPARATION, PROPERTIES AND APPLICATIONS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Quasicrystals 2003 - Preparation, Properties and Applications held at the 2003 MRS Fall Meeting CY DEC 01-03, 2003 CL Boston, MA SP Mat Res Soc ID ALLOYS; GLASS; CRYSTALLIZATION AB This report continues previous studies that show melt spun Zr80Pt20 ribbons having oxygen contents ranging from <200 to approximately 5000 mass ppm form various meta-stable phases during quenching. In the presence of sufficient oxygen, a big cube Zr6Pt3O phase forms, but this structure is de-stabilized towards an icosahedral quasicrystalline structure at lower oxygen levels. Further reduction of oxygen promotes increasingly stable Zr-Pt bonds, and a meta-stable beta-Zr(Pt) structure is formed. C1 Iowa State Univ, Ames Lab, USDOE, Mat & Engn Phys Program, Ames, IA 50011 USA. RP Sordelet, D (reprint author), Iowa State Univ, Ames Lab, USDOE, Mat & Engn Phys Program, Ames, IA 50011 USA. RI Feuerbacher, Michael/K-3768-2013 OI Feuerbacher, Michael/0000-0003-2882-4960 NR 16 TC 1 Z9 1 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-743-1 J9 MATER RES SOC SYMP P PY 2004 VL 805 BP 21 EP 27 PG 7 WC Crystallography; Metallurgy & Metallurgical Engineering SC Crystallography; Metallurgy & Metallurgical Engineering GA BY92K UT WOS:000189496300003 ER PT S AU Yan, YF Pennycook, SJ AF Yan, YF Pennycook, SJ BE BelinFerre, E Feuerbacher, M Ishii, Y Sordelet, DJ TI Local structural variations in Al72Ni20Co8 decagonal quasicrystals SO QUASICRYSTALS 2003-PREPARATION, PROPERTIES AND APPLICATIONS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Quasicrystals 2003 - Preparation, Properties and Applications held at the 2003 MRS Fall Meeting CY DEC 01-03, 2003 CL Boston, MA SP Mat Res Soc ID UNIT-CELL MODEL; AL-MN; MOLECULAR-DYNAMICS; ATOM-CLUSTER; PSEUDOPOTENTIALS; AL65CU20CO15; TRANSITION; SYMMETRY; ALLOYS AB We investigate local structural variations in Al72Ni20Co8 quasicrystals using first principles density-functional total-energy calculations. We find that local chemical fluctuation can cause large structural variations on the central rings of the 2-nm clusters. Such structure variations may result in ambiguities at the central rings in high-resolution electron microscopy images of Al72Ni20Co8 decagonal quasicrystals. C1 Natl Renewable Energy Lab, Golden, CO 80401 USA. RP Yan, YF (reprint author), Natl Renewable Energy Lab, Golden, CO 80401 USA. RI Feuerbacher, Michael/K-3768-2013 OI Feuerbacher, Michael/0000-0003-2882-4960 NR 28 TC 0 Z9 0 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-743-1 J9 MATER RES SOC SYMP P PY 2004 VL 805 BP 241 EP 246 PG 6 WC Crystallography; Metallurgy & Metallurgical Engineering SC Crystallography; Metallurgy & Metallurgical Engineering GA BY92K UT WOS:000189496300029 ER PT S AU Wu, YQ Kramer, MJ Lograsso, TA AF Wu, YQ Kramer, MJ Lograsso, TA BE BelinFerre, E Feuerbacher, M Ishii, Y Sordelet, DJ TI Local order in single grain Cd-Yb Icosahedral phase SO QUASICRYSTALS 2003-PREPARATION, PROPERTIES AND APPLICATIONS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Quasicrystals 2003 - Preparation, Properties and Applications held at the 2003 MRS Fall Meeting CY DEC 01-03, 2003 CL Boston, MA SP Mat Res Soc ID QUASI-CRYSTALS; ALLOYS; CA AB Single grains of icosahedral Cd84Yb16 quasicrystalline phase were characterized using high resolution transmission electron microcopy (HRTEM) technique. Image reconstruction of the obtained multiple through-focal series for both the two and five-fold axes ate consistent with the local cluster structure of concentric polyhedra consisting of Cd tetrahedron (1/3 occupied icosahedron), Cd dodecahedron, Yb icosahedron and a Cd icosidodecahedron. Edge-sharing of the clusters can result in complete tiling of the 2-D projections. Simple matching rules are being investigated to construct a 3-D model. C1 Ames Lab, Ames, IA 50011 USA. RP Wu, YQ (reprint author), Ames Lab, Ames, IA 50011 USA. RI Feuerbacher, Michael/K-3768-2013 OI Feuerbacher, Michael/0000-0003-2882-4960 NR 8 TC 1 Z9 1 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-743-1 J9 MATER RES SOC SYMP P PY 2004 VL 805 BP 247 EP 252 PG 6 WC Crystallography; Metallurgy & Metallurgical Engineering SC Crystallography; Metallurgy & Metallurgical Engineering GA BY92K UT WOS:000189496300030 ER PT S AU Yang, XY Kramer, MJ Rozhkova, EA Sordelet, DJ AF Yang, XY Kramer, MJ Rozhkova, EA Sordelet, DJ BE BelinFerre, E Feuerbacher, M Ishii, Y Sordelet, DJ TI Structural relationships between QC and meta-stable crystalline phases in melt spun Zr80Pt20 ribbons SO QUASICRYSTALS 2003-PREPARATION, PROPERTIES AND APPLICATIONS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Quasicrystals 2003 - Preparation, Properties and Applications held at the 2003 MRS Fall Meeting CY DEC 01-03, 2003 CL Boston, MA SP Mat Res Soc ID ICOSAHEDRAL PHASE; BINARY-ALLOYS; ZR-PD AB Two competing meta-stable crystalline phases, a bee hyperstoichiometric beta-Zr(Pt) (Im3m) superstructure and a non-stoichiometric fcc epsilon-Zr6Pt3O (Fd3m) phase, have been observed to coexist with a quasicrystalline (i) phase, respectively, in as-spun Zr80Pt20 ribbons with low oxygen content (184ppm mass O) and high oxygen content (4737 ppm mass O). Transmission electron microscopy (TEM) results show that the beta-Zr(Pt) superstructure and i phase have a well defined orientational relationship, good crystallographic match and nearly identical stoichiometry. Icosahedral two-fold axes coincide with <110>, <111>, <112> and <113> axes in beta-Zr(Pt); {110}(beta-Zr) planes register with icosahedral {211111} fivefold or {221001} twofold planes. The observed orientational relationship and the space group (Im3m) preclude beta-Zr(Pt) as a cubic approximant to the i phase. Both beta-Zr(Pt) and the i phase are distorted; beta-zr(Pt) maintains a basic beta-Zr Bravais lattice with an aperiodic supertattice. Morphologies suggest that the i phase forms first, followed by an easy nucleation of the beta-Zr(Pt) on the surfaces of the i phase. Also, a similar orientational relationship and lattice match between epsilon-Zr6Pt3O and i phase has been revealed by TEM. C1 Iowa State Univ, Ames Lab, USDOE, Mat & Engn Phys Program, Ames, IA 50011 USA. RP Yang, XY (reprint author), Iowa State Univ, Ames Lab, USDOE, Mat & Engn Phys Program, Ames, IA 50011 USA. RI Feuerbacher, Michael/K-3768-2013 OI Feuerbacher, Michael/0000-0003-2882-4960 NR 11 TC 0 Z9 0 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-743-1 J9 MATER RES SOC SYMP P PY 2004 VL 805 BP 259 EP 265 PG 7 WC Crystallography; Metallurgy & Metallurgical Engineering SC Crystallography; Metallurgy & Metallurgical Engineering GA BY92K UT WOS:000189496300032 ER PT B AU Clark, JA Barber, RC Boudreau, C Buchinger, F Crawford, JE Greene, JP Gulick, S Heinz, A Lee, JKP Levand, AF Savard, G Scielzo, N Sharma, KS Sprouse, GD Trimble, W Vaz, J Wang, JC Wang, Y Zabransky, BZ Zhou, Z AF Clark, JA Barber, RC Boudreau, C Buchinger, F Crawford, JE Greene, JP Gulick, S Heinz, A Lee, JKP Levand, AF Savard, G Scielzo, N Sharma, KS Sprouse, GD Trimble, W Vaz, J Wang, JC Wang, Y Zabransky, BZ Zhou, Z BE Qian, YZ Rehm, E Schatz, H Theilemann, FK TI Precise mass measurements of nuclides approaching the r-process SO r-Process: The Astrophysical Origin of the Heavy Elements and Related Rare Isotope Accelerator Physics SE PROCEEDINGS FROM THE INSTITUTE FOR NUCLEAR THEORY LA English DT Proceedings Paper CT 1st Argonne/MSU/JINA/INT RIA Workshop on the r-Process CY JAN, 2004 CL Seattle, WA SP Argonne Natl Lab, Michigan State Univ, Joint Inst Nucl Astrophys, Inst Nucl Theory ID PENNING TRAP; ION; ACCURACY; ELECTRON AB The astrophysical r-process is thought to be responsible for the creation of more than half of the elements heavier than iron. An explanation of the nuclide abundances requires information on masses, which are best obtained through direct measurements. The Canadian Penning Trap (CPT) mass spectrometer at Argonne National Laboratory has completed the measurement of 26 neutron-rich Ba, La, Ce, and Pr isotopes approaching the r-process path. The results of these measurements and their potential impact on the r-process are presented in this paper. C1 Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RP Clark, JA (reprint author), Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA. RI Crawford, John/A-3771-2012; Heinz, Andreas/E-3191-2014 NR 14 TC 2 Z9 2 U1 0 U2 1 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA PO BOX 128 FARRER RD, SINGAPORE 9128, SINGAPORE BN 981-256-032-7 J9 PROC INST NUCL THEOR PY 2004 VL 13 BP 11 EP 19 DI 10.1142/9789812702470_0002 PG 9 WC Astronomy & Astrophysics; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Astronomy & Astrophysics; Physics GA BCL91 UT WOS:000229962300002 ER PT B AU Reddy, S AF Reddy, S BE Qian, YZ Rehm, E Schatz, H Theilemann, FK TI Equation of state and neutrino opacity of dense stellar matter SO R-PROCESS: THE ASTROPHYSICAL ORIGIN OF THE HEAVY ELEMENTS AND RELATED RARE ISOTOPE ACCELERATOR PHYSICS SE PROCEEDINGS FROM THE INSTITUTE FOR NUCLEAR THEORY LA English DT Proceedings Paper CT 1st Argonne/MSU/JINA/INT RIA Workshop on the r-Process CY JAN, 2004 CL Seattle, WA SP Argonne Natl Lab, Michigan State Univ, Joint Inst Nucl Astrophys, Inst Nucl Theory ID NUCLEAR-MATTER; TRANSPORT; EVOLUTION; STARS AB The properties of matter at densities similar to nuclear density plays an important role in core collapse supernova. In this talk I discuss aspects of the equation of state and weak interactions at high density. I highlight its relation to the temporal and spectral features of the neutrino emission from the newly born neutron star born in the aftermath of a core-collapse supernova. I will briefly comment on how this will impact r-process nucleosynthesis. C1 Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. RP Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA. EM reddy@lanl.gov NR 21 TC 0 Z9 0 U1 0 U2 1 PU WORLD SCIENTIFIC PUBL CO PTE LTD PI SINGAPORE PA PO BOX 128 FARRER RD, SINGAPORE 9128, SINGAPORE BN 981-256-032-7 J9 PROC INST NUCL THEOR PY 2004 VL 13 BP 89 EP 98 DI 10.1142/9789812702470_0010 PG 10 WC Astronomy & Astrophysics; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Astronomy & Astrophysics; Physics GA BCL91 UT WOS:000229962300010 ER PT B AU Cardall, CY AF Cardall, CY BE Qian, YZ Rehm, E Schatz, H Theilemann, FK TI General relativity and neutrino-driven supernova winds SO r-Process: The Astrophysical Origin of the Heavy Elements and Related Rare Isotope Accelerator Physics SE PROCEEDINGS FROM THE INSTITUTE FOR NUCLEAR THEORY LA English DT Proceedings Paper CT 1st Argonne/MSU/JINA/INT RIA Workshop on the r-Process CY JAN, 2004 CL Seattle, WA SP Argonne Natl Lab, Michigan State Univ, Joint Inst Nucl Astrophys, Inst Nucl Theory ID R-PROCESS NUCLEOSYNTHESIS; CORE-COLLAPSE SUPERNOVAE; DIFFUSIVE INSTABILITIES; MECHANISM; EXPLOSIONS; CONVECTION; STARS AB To date, detailed core-collapse supernova simulations have not succeeded in elucidating the explosion mechanism. But whatever the mechanism turns out to be, there will be a neutrino-heated outflow between the hot, newly-born neutron star and the outgoing supernova shock wave whose neutron richness, low density, and high temperature could provide promising conditions for the synthesis of heavy nuclei via rapid neutron capture (the r-process). General relativistic effects improve the prospects for this outflow as an r-process site. Among relativistic effects, the enhanced "gravitational potential" is more important than the gravitational redshift or trajectory bending of neutrinos. C1 Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. RP Cardall, CY (reprint author), Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA. NR 28 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 981-256-032-7 J9 PROC INST NUCL THEOR PY 2004 VL 13 BP 186 EP 195 DI 10.1142/9789812702470_0020 PG 10 WC Astronomy & Astrophysics; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Astronomy & Astrophysics; Physics GA BCL91 UT WOS:000229962300020 ER PT B AU Pruet, J AF Pruet, J BE Qian, YZ Rehm, E Schatz, H Theilemann, FK TI Are collapsars responsible for some r-process elements? How could we tell? SO r-Process: The Astrophysical Origin of the Heavy Elements and Related Rare Isotope Accelerator Physics SE PROCEEDINGS FROM THE INSTITUTE FOR NUCLEAR THEORY LA English DT Proceedings Paper CT 1st Argonne/MSU/JINA/INT RIA Workshop on the r-Process CY JAN, 2004 CL Seattle, WA SP Argonne Natl Lab, Michigan State Univ, Joint Inst Nucl Astrophys, Inst Nucl Theory ID BURST ACCRETION DISKS; GAMMA-RAY BURSTS; NUCLEOSYNTHESIS; ABUNDANCES; EXPLOSIONS; STARS AB We consider the possibility that supernovae which form hyper-accreting black holes might be responsible for synthesis of r-process elements with mass A less than or similar to 130. Calculations are presented which show that these elements are naturally synthesized in neutron-rich magnetically-dominated bubbles born in the inner regions of a black hole accretion disk. Simple considerations suggest that the total mass ejected in the form of these bubbles is about that needed to account for the entire galactic inventory of the 2nd-peak r-process elements. We also argue that if collapsars are responsible for, e.g., Ag synthesis, then Ag abundances should be correlated with Sc and/or Zn abundances in metal-poor stars. C1 Lawrence Livermore Natl Lab, N Div, Livermore, CA 94550 USA. RP Pruet, J (reprint author), Lawrence Livermore Natl Lab, N Div, 7000 E Ave, Livermore, CA 94550 USA. NR 18 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 981-256-032-7 J9 PROC INST NUCL THEOR PY 2004 VL 13 BP 214 EP 223 DI 10.1142/9789812702470_0023 PG 10 WC Astronomy & Astrophysics; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Astronomy & Astrophysics; Physics GA BCL91 UT WOS:000229962300023 ER PT B AU Fryer, CL Hungerford, A AF Fryer, CL Hungerford, A BE Qian, YZ Rehm, E Schatz, H Theilemann, FK TI Changing the r-process paradigm: Multi-dimensional and fallback effects SO r-Process: The Astrophysical Origin of the Heavy Elements and Related Rare Isotope Accelerator Physics SE PROCEEDINGS FROM THE INSTITUTE FOR NUCLEAR THEORY LA English DT Proceedings Paper CT 1st Argonne/MSU/JINA/INT RIA Workshop on the r-Process CY JAN, 2004 CL Seattle, WA SP Argonne Natl Lab, Michigan State Univ, Joint Inst Nucl Astrophys, Inst Nucl Theory ID NEUTRINO-DRIVEN WINDS; PROCESS NUCLEOSYNTHESIS; STARS AB Supernovae are now known to be far from symmetric. At the very least, rotation and convective instabilities alter the spherically symmetric picture producing asymmetric explosions and leaving behind aspherical neutron stars. These asymmetries may be critical to the mechanism behind supernova explosions. Similarly, asphericities in the core just after the launch of the supernova explosion may well change the yield of r-process nucleosynthesis. Rotation and fallback are two of the major aspherical effects altering the r-process yield. They produce asymmetric winds and can increase the entropy and propagation time of the r-process material. These two processes are reviewed here. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Fryer, CL (reprint author), Los Alamos Natl Lab, T-6,CCS-4, Los Alamos, NM 87545 USA. NR 10 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 981-256-032-7 J9 PROC INST NUCL THEOR PY 2004 VL 13 BP 234 EP 243 DI 10.1142/9789812702470_0025 PG 10 WC Astronomy & Astrophysics; Physics, Atomic, Molecular & Chemical; Physics, Nuclear SC Astronomy & Astrophysics; Physics GA BCL91 UT WOS:000229962300025 ER PT S AU Dickey, FM DeLaurentis, JM Doerry, AW AF Dickey, FM DeLaurentis, JM Doerry, AW BE Trebits, R Kurtz, JL Appleby, R Salmon, NA Wikner, DA TI A SAR imaging model for large-scale atmospheric inhomogeneities SO RADAR SENSOR TECHNOLOGY VIII AND PASSIVE MILLIMETER-WAVE IMAGING TECHNOLOGY VII SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Radar Sensor Technology VIII and Passive Millimeter-Wave Imaging Technology VII CY APR 14-15, 2004 CL Orlando, FL SP SPIE DE synthetic aperture radar; SAP; image anomalies; atmospheric effects ID SYNTHETIC-APERTURE RADAR; TURBULENCE AB This paper addresses anomalies that occasionally appear in SAR images. The cause is assumed to be atmospheric inhomogeneities. The atmospheric effect is small and should be more noticeable at longer ranges. A first order model of the SAR image formation process is developed. This model predicts secondary effects in the image that are not directly observed. The secondary effects are attributed to coupling between the image and frequency (data) space. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Dickey, FM (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 13 TC 5 Z9 5 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 0-8194-5333-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5410 BP 1 EP 9 DI 10.1117/12.541560 PG 9 WC Imaging Science & Photographic Technology SC Imaging Science & Photographic Technology GA BAW92 UT WOS:000223994700001 ER PT S AU Ormesher, RC Plummer, KW Wells, LM AF Ormesher, RC Plummer, KW Wells, LM BE Trebits, R Kurtz, JL Appleby, R Salmon, NA Wikner, DA TI Current radar responsive tag development activities at Sandia National Laboratories SO RADAR SENSOR TECHNOLOGY VIII AND PASSIVE MILLIMETER-WAVE IMAGING TECHNOLOGY VII SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Radar Sensor Technology VIII and Passive Millimeter-Wave Imaging Technology VII CY APR 14-15, 2004 CL Orlando, FL SP SPIE DE radar; RF tag; CID; SAR; GMTI C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Ormesher, RC (reprint author), Sandia Natl Labs, POB 5800,MS 0519, Albuquerque, NM 87185 USA. NR 0 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 0-8194-5333-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5410 BP 10 EP 16 DI 10.1117/12.541665 PG 7 WC Imaging Science & Photographic Technology SC Imaging Science & Photographic Technology GA BAW92 UT WOS:000223994700002 ER PT S AU Doerry, AW AF Doerry, AW BE Trebits, R Kurtz, JL Appleby, R Salmon, NA Wikner, DA TI Atmospheric loss considerations for synthetic aperture radar design and operation SO RADAR SENSOR TECHNOLOGY VIII AND PASSIVE MILLIMETER-WAVE IMAGING TECHNOLOGY VII SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Radar Sensor Technology VIII and Passive Millimeter-Wave Imaging Technology VII CY APR 14-15, 2004 CL Orlando, FL SP SPIE DE SAP; radar. atmosphere; weather; performance ID RAIN ATTENUATION AB A significant loss factor for Synthetic Aperture Radar (SAR) is the atmosphere, particularly under conditions of adverse weather. Dominating these losses are 1) atmospheric clear-air attenuation due to a) oxygen absorption, and b) water vapor absorption., 2) cloud liquid water absorption.. and 3) attenuation due to rain. These losses are very nonlinear with respect to radar operating frequency, and their relative significance obviously depends on the nature of the weather being modeled. Attenuation is also very operating geometry dependent.. and typically increases with range and shallower depression angles. The net effect is that while airborne radar operation at short ranges often favors higher frequencies owing to higher antenna gain for a given real aperture antenna, radar operation at longer ranges often favors lower frequencies in spite of this. In fact.. at any particular range.. an optimal SAR operating frequency that maximizes SNR exists for a given weather condition.. transmitter power, and antenna aperture area. This paper discusses loss rates due to various loss contributors, and then quantifies expected atmospheric loss rates and their frequency dependence for typical adverse weather specifications for SAR systems. Furthermore, this paper describes airborne SAR operating geometries for which various radar frequency bands are optimal. C1 Sandia Natl Labs, Livermore, CA 94550 USA. RP Doerry, AW (reprint author), POB 5800,MS 0519, Albuquerque, NM 87185 USA. NR 12 TC 1 Z9 1 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 0-8194-5333-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5410 BP 17 EP 27 DI 10.1117/12.542327 PG 11 WC Imaging Science & Photographic Technology SC Imaging Science & Photographic Technology GA BAW92 UT WOS:000223994700003 ER PT S AU Doerry, AW Gutierrez, VD Wells, L AF Doerry, AW Gutierrez, VD Wells, L BE Trebits, R Kurtz, JL Appleby, R Salmon, NA Wikner, DA TI A portfolio of fine resolution SAR images SO RADAR SENSOR TECHNOLOGY VIII AND PASSIVE MILLIMETER-WAVE IMAGING TECHNOLOGY VII SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Radar Sensor Technology VIII and Passive Millimeter-Wave Imaging Technology VII CY APR 14-15, 2004 CL Orlando, FL SP SPIE DE SAP; radar; image AB Sandia National Laboratories designs and builds Synthetic Aperture Radar (SAR) systems capable of forming high-quality exceptionally fine resolution images. Resolutions as fine as 4 inches (10 cm) in both slant range and azimuth are routinely formed in real time on board Sandia's DeHavilland DHC-6 Twin Otter aircraft using a Ku-band SAR. Resolutions as fine as 6 inches (15 cm) in both slant range and azimuth are routinely formed using an X-band SAR. Careful system design allows high image quality as measured by nearly ideal Impulse Response (IPR) shapes, with typical Multiplicative Noise Ratios (MNR) of better than 20 dB, and a noise equivalent reflectivity usually better than -30 dB. Collection geometries routinely include squint angles 45 degrees both fore and aft of broadside, on either side of the aircraft. This paper offers a collection of high quality images representative of the output of Sandia's testbed radar. High-quality fine-resolution images of a variety of target scenes will be displayed, with annotation describing relevant image parameters. C1 Sandia Natl Labs, Livermore, CA 94550 USA. RP Doerry, AW (reprint author), POB 5800,MS 0519, Albuquerque, NM 87185 USA. NR 3 TC 0 Z9 0 U1 1 U2 1 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5333-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5410 BP 28 EP 35 DI 10.1117/12.542409 PG 8 WC Imaging Science & Photographic Technology SC Imaging Science & Photographic Technology GA BAW92 UT WOS:000223994700004 ER PT S AU Kim, TJ AF Kim, TJ BE Trebits, R Kurtz, JL Appleby, R Salmon, NA Wikner, DA TI Motion measurement for high-accuracy real-time airborne SAR SO RADAR SENSOR TECHNOLOGY VIII AND PASSIVE MILLIMETER-WAVE IMAGING TECHNOLOGY VII SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Radar Sensor Technology VIII and Passive Millimeter-Wave Imaging Technology VII CY APR 14-15, 2004 CL Orlando, FL SP SPIE DE motion measurement; SAP; IMU; GPS ID ALGORITHM AB A real-time airborne synthetic aperture radar requires accurate measurement of the antenna at high and low frequencies to produce well-focused images with minimal target location errors. Sandia National Laboratories achieves accurate motion measurement by updating a navigation solution derived from an inertial measurement unit with global positioning system measurements via a unique Kalman filter. An overview of the motion measurement design and implementation is presented for the Lynx and Rapid Terrain Visualization radars, as well as results from a variety of experiments. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Kim, TJ (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 13 TC 7 Z9 7 U1 2 U2 4 PU SPIE-INT SOC OPTICAL ENGINEERING PI BELLINGHAM PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA SN 0277-786X BN 0-8194-5333-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5410 BP 36 EP 44 DI 10.1117/12.542410 PG 9 WC Imaging Science & Photographic Technology SC Imaging Science & Photographic Technology GA BAW92 UT WOS:000223994700005 ER PT S AU Doerry, AW Gutierrez, VD Wells, L AF Doerry, AW Gutierrez, VD Wells, L BE Trebits, R Kurtz, JL Appleby, R Salmon, NA Wikner, DA TI A portfolio of fine resolution SAR images - continued SO RADAR SENSOR TECHNOLOGY VIII AND PASSIVE MILLIMETER-WAVE IMAGING TECHNOLOGY VII SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Radar Sensor Technology VIII and Passive Millimeter-Wave Imaging Technology VII CY APR 14-15, 2004 CL Orlando, FL SP SPIE DE SAR; radar; image AB Sandia National Laboratories designs and builds Synthetic Aperture Radar (SAR) systems capable of forming high-quality exceptionally fine resolution real-time images. Resolutions as fine as 4 inches (10 cm) in both slant range and azimuth are routinely formed in real time on board Sandia's DeHavilland DHC-6 Twin Otter aircraft using a Ku-band SAR. Resolutions as fine as 6 inches (15 cm) in both slant range and azimuth are routinely formed using an X-band SAR. Careful system design allows high image quality as measured by nearly ideal Impulse Response (IPR) shapes, with typical Multiplicative Noise Ratios (MNR) of better than 20 dB, and a noise equivalent reflectivity usually better than -30 dB. Collection geometries routinely include squint angles 45 degrees both fore and aft of broadside, on either side of the aircraft. This paper offers a collection of high quality images representative of the output of Sandia's testbed radar. High-quality fine-resolution images of a variety of target scenes will be displayed.. with annotation describing relevant image parameters. This paper is the second of a set of two portfolios. C1 Sandia Natl Labs, Livermore, CA 94550 USA. RP Doerry, AW (reprint author), Sandia Natl Labs, Livermore, CA 94550 USA. NR 3 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 0-8194-5333-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5410 BP 185 EP 194 DI 10.1117/12.554430 PG 10 WC Imaging Science & Photographic Technology SC Imaging Science & Photographic Technology GA BAW92 UT WOS:000223994700020 ER PT S AU Shao, XM Junor, W Zenick, R Rogers, A Dighe, K AF Shao, XM Junor, W Zenick, R Rogers, A Dighe, K BE Trebits, R Kurtz, JL Appleby, R Salmon, NA Wikner, DA TI Passive interferometric millimeter-wave imaging: achieving big results with a constellation of small satellites SO RADAR SENSOR TECHNOLOGY VIII AND PASSIVE MILLIMETER-WAVE IMAGING TECHNOLOGY VII SE PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) LA English DT Proceedings Paper CT Conference on Radar Sensor Technology VIII and Passive Millimeter-Wave Imaging Technology VII CY APR 14-15, 2004 CL Orlando, FL SP SPIE DE interferometric imaging; mmw; small satellite AB Los Alamos National Laboratory (LANL) and AeroAstro have recently investigated the feasibility of space-based passive interferometric millimeter wave imaging (PIMI). The goal of this study is to explore a new capability that can offer day/night, all-weather, passive imaging with a 1-meter resolution, by means of millimetric interferometry via a small constellation of microsatellites. According to our preliminary study, a system with four LEO satellites operating at multiple frequency channels within 95-150 GHz is capable of providing an imagery of 1-m spatial resolution. The corresponding temperature sensitivity is estimated to be similar to20degreesK, enough to distinguish most artifacts from a variety of backgrounds. To achieve the stated resolution and sensitivity with only four satellites, we make use of ten frequency channels to synthesize ten effective baselines between any pair of satellites. In addition, the satellites will "stare" at a common target area off the track direction for about 2 minutes while they pass over the area. This type of observation will introduce much improved spatial frequency coverage due to the relative rotation of the baseline vectors. It also improves the imagery SNR with a longer viewing time, as compared to a downward looking system. To the target, the side-looking observation also has the advantage of near constant incident (zenith) angle. The satellites are required to perform a formation flight but a rigid formation is not necessary. Simultaneous interferometric measurement of GPS signals, together with inter-satellites ranging will allow us to monitor the baseline length and direction to an adequate accuracy. A tradeoff study has also been conducted between the system performance and the technology availability, i.e., the current state-of-the-art technologies for space-borne antenna, millimeter-wave receiver, high-speed digitizer, inter-satellites data communication, and so forth. C1 Los Alamos Natl Lab, Space & Atmospher Sci Grp, Los Alamos, NM 87545 USA. RP Shao, XM (reprint author), Los Alamos Natl Lab, Space & Atmospher Sci Grp, POB 1663, Los Alamos, NM 87545 USA. NR 5 TC 1 Z9 1 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 0-8194-5333-1 J9 P SOC PHOTO-OPT INS PY 2004 VL 5410 BP 270 EP 277 DI 10.1117/12.542448 PG 8 WC Imaging Science & Photographic Technology SC Imaging Science & Photographic Technology GA BAW92 UT WOS:000223994700030 ER PT S AU Zinkle, SJ Hashimoto, N Matsukawa, Y Stoller, RE Osetsky, YN AF Zinkle, SJ Hashimoto, N Matsukawa, Y Stoller, RE Osetsky, YN BE Wang, LM Fromknecht, R Snead, LL Downey, DF Takahashi, H TI Microstructures of irradiated and mechanically deformed metals and alloys: Fundamental aspects SO RADIATION EFFECTS AND ION-BEAM PROCESSING OF MATERIALS SE Materials Research Society Symposium Proceedings LA English DT Proceedings Paper CT Symposium on Radiation Effects and Ion-Beam Processing of Materials held at the 2003 MRS Fall Meeting CY DEC 01-05, 2003 CL Boston, MA SP Mat Res Soc ID STACKING-FAULT TETRAHEDRA; 14-MEV NEUTRON-IRRADIATION; DEFECT CLUSTER FORMATION; DISPLACEMENT CASCADES; COPPER-ALLOYS; MOLECULAR-DYNAMICS; STATISTICAL-ANALYSIS; DISLOCATION LOOPS; DOSE DEPENDENCE; BCC IRON AB Recent molecular dynamics and transmission electron microscopy results on irradiated metallic materials are reviewed, with an emphasis on defect production in the displacement cascade and the fluence- and temperature-dependent accumulation of defect clusters. Materials analyzed include Fe, V, Cu, austenitic stainless steel, V4%Cr4%Ti, and ferritic/martensitic steel. Intrinsic differences between the defect accumulation behavior of body centered cubic (BCC) and face centered cubic (FCC) metals are highlighted. Results on the temperature-dependent vacancy cluster density of Cu are discussed in terms of thermal stability of stacking fault tetrahedra (SFTs). Finally, recent results on deformation behavior of irradiated, quenched, and deformed metals are discussed, with particular emphasis on flow localization mechanisms (e.g., dislocation channeling), and experimental and molecular dynamics studies of the detailed dislocation-defect cluster interactions. C1 Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA. RP Oak Ridge Natl Lab, Div Met & Ceram, POB 2008, Oak Ridge, TN 37831 USA. RI Stoller, Roger/H-4454-2011 NR 59 TC 4 Z9 4 U1 0 U2 5 PU MATERIALS RESEARCH SOC PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-730-X J9 MATER RES SOC SYMP P PY 2004 VL 792 BP 3 EP 12 PG 10 WC Instruments & Instrumentation; Materials Science, Multidisciplinary; Nuclear Science & Technology SC Instruments & Instrumentation; Materials Science; Nuclear Science & Technology GA BY91P UT WOS:000189494300001 ER PT S AU Gan, J Allen, TR Cole, JI Ukai, S Shutthanandan, S Thevuthasan, S AF Gan, J Allen, TR Cole, JI Ukai, S Shutthanandan, S Thevuthasan, S BE Wang, LM Fromknecht, R Snead, LL Downey, DF Takahashi, H TI The irradiated microstructure of ferritic-martensitic steel T91 and 9Cr-ODS SO RADIATION EFFECTS AND ION-BEAM PROCESSING OF MATERIALS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Radiation Effects and Ion-Beam Processing of Materials held at the 2003 MRS Fall Meeting CY DEC 01-05, 2003 CL Boston, MA SP Mat Res Soc AB A ferritic steel T91 and an oxide dispersion strengthened (ODS) martensitic steel 9Cr-ODS 1.38x10(-3) were irradiated with 5 MeV Ni ions at 500degreesC at a dose rate of. dpa/s to doses of 5, 50 and 150 dpa. Both alloys are iron-based with 9Cr and have been. designed for use in higher temperature energy systems. However, the radiation effects on these two alloys are not well characterized. For T91, the irradiated microstructure was dominated by tangled dislocation and precipitates, similar to the unirradiated condition except the presence of large dislocation loops of type a<100>. The microstructure of alloy 9Cr-ODS for both the unirradiated and irradiated cases was dominated by dense dislocations, precipitates and yttrium oxides particles and no dislocation loops were observed. The average size of yttrium oxides particles slightly decreased with dose from 11.8 nm for the unirradiated to 9.1 nm at 150 dpa. No voids were detected for both alloys up to a dose of 150 dpa. C1 Argonne Natl Lab, Nucl Technol Div, Argonne, IL 60439 USA. RP Gan, J (reprint author), Argonne Natl Lab, Nucl Technol Div, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 6 TC 4 Z9 4 U1 0 U2 2 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-730-X J9 MATER RES SOC SYMP P PY 2004 VL 792 BP 13 EP 18 PG 6 WC Instruments & Instrumentation; Materials Science, Multidisciplinary; Nuclear Science & Technology SC Instruments & Instrumentation; Materials Science; Nuclear Science & Technology GA BY91P UT WOS:000189494300002 ER PT S AU Zhang, Y Shutthanandan, V Thevuthasan, S McCready, DE Young, J Devanathan, R Andreasen, J Balakrishnan, G Paul, DM Weber, WJ AF Zhang, Y Shutthanandan, V Thevuthasan, S McCready, DE Young, J Devanathan, R Andreasen, J Balakrishnan, G Paul, DM Weber, WJ BE Wang, LM Fromknecht, R Snead, LL Downey, DF Takahashi, H TI Damage evolution and annealing of Au-irradiated samarium titanate pyrochlore SO RADIATION EFFECTS AND ION-BEAM PROCESSING OF MATERIALS SE Materials Research Society Symposium Proceedings LA English DT Proceedings Paper CT Symposium on Radiation Effects and Ion-Beam Processing of Materials held at the 2003 MRS Fall Meeting CY DEC 01-05, 2003 CL Boston, MA SP Mat Res Soc ID SELF-RADIATION DAMAGE; ION IRRADIATION; HOST PHASES; ZIRCONOLITE; GD2TI2O7; OXIDES; IMMOBILIZATION; TEMPERATURE AB Damage evolution and thermal recovery of 1 MeV Au2+ irradiated samarium titanate pyrochlore (Sm2Ti2O7) single crystals were studied by Rutherford backscattering spectroscopy and nuclear reaction analysis. ne damage accumulation follows a nonlinear dependence on dose that is well described by a disorder accumulation model, which indicates a predominant role of defect stimulated amorphization processes. The critical dose for amorphization at 170 and 300 K is similar to0.14 dpa, and a higher dose of similar to 0.22 dpa is observed for irradiation at 700 K, which agrees with previous in-situ transmission electron microscopy (TEM) data for polycrystatline Sm2Ti2O7. Annealing in an 180 environment reveals a damage recovery stage at similar to 850 K that coincides with a significant increase in O-18 exchange due to oxygen vacancy mobility. This thermal recovery stage is also consistent with the critical temperature for amorphization measured by in-situ TEM in polycrystalline samples. C1 Pacific NW Natl Lab, Richland, WA USA. RP Pacific NW Natl Lab, Richland, WA USA. RI Weber, William/A-4177-2008 OI Weber, William/0000-0002-9017-7365 NR 24 TC 0 Z9 0 U1 0 U2 1 PU MATERIALS RESEARCH SOC PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-730-X J9 MATER RES SOC SYMP P PY 2004 VL 792 BP 69 EP 74 PG 6 WC Instruments & Instrumentation; Materials Science, Multidisciplinary; Nuclear Science & Technology SC Instruments & Instrumentation; Materials Science; Nuclear Science & Technology GA BY91P UT WOS:000189494300009 ER PT S AU Birtcher, RC Donnelly, SE Morrison, I Allen, CW Furuya, K Song, MH Mitsuishi, K Dahmen, U AF Birtcher, RC Donnelly, SE Morrison, I Allen, CW Furuya, K Song, MH Mitsuishi, K Dahmen, U BE Wang, LM Fromknecht, R Snead, LL Downey, DF Takahashi, H TI Xe precipitates in aluminum SO RADIATION EFFECTS AND ION-BEAM PROCESSING OF MATERIALS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Radiation Effects and Ion-Beam Processing of Materials held at the 2003 MRS Fall Meeting CY DEC 01-05, 2003 CL Boston, MA SP Mat Res Soc ID IMPLANTED ALUMINUM; HARD-SPHERES; IN-SITU; 300 K; AL; COALESCENCE; TEMPERATURE; TRANSITION; INTERFACE; TENSION AB Real space, high-resolution transmission electron microscopy observations of Xe confined in nanometer size faceted cavities in Al yield information on both the inert gas and the matrix in which it is confined. At room temperature, Xe in such cavities can be liquid or an fee solid. In larger cavities, Xe within can undergo melting and recrystallization. The Al surface energy can be deduced from the largest Xe nanocrystal at 300 K by setting the corresponding calculated Laplace pressure equal to the equilibrium pressure for melting of Xe, obtained from empirical bulk compression data. These surface energy values are 1.05 J m(-2) for {111} facets and 1.10 J m(-2) for {200} facets. Because of the weak interactions, these values correspond to the surface tensions for Al at 300 K. At room temperature, fluid Xe confined in small faceted cavities in aluminum has up to three ordered layers of Xe atoms at the Al interface. Conceptually in a three-dimensionally confined system of sufficiently small size, complete three-dimensional ordering of the fluid may occur. Molecular dynamics simulations have revealed that such ordering would result in fluid Xe confined to a small tetragonal volume solidifying as a body-centered cubic phase on compression. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Birtcher, RC (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 30 TC 0 Z9 0 U1 0 U2 2 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-730-X J9 MATER RES SOC SYMP P PY 2004 VL 792 BP 213 EP 222 PG 10 WC Instruments & Instrumentation; Materials Science, Multidisciplinary; Nuclear Science & Technology SC Instruments & Instrumentation; Materials Science; Nuclear Science & Technology GA BY91P UT WOS:000189494300029 ER PT S AU Kirk, MA Davidson, RS Jenkins, ML Twesten, RD AF Kirk, MA Davidson, RS Jenkins, ML Twesten, RD BE Wang, LM Fromknecht, R Snead, LL Downey, DF Takahashi, H TI Diffuse electron scattering by nanometer-sized defects in gold and tantalum SO RADIATION EFFECTS AND ION-BEAM PROCESSING OF MATERIALS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Radiation Effects and Ion-Beam Processing of Materials held at the 2003 MRS Fall Meeting CY DEC 01-05, 2003 CL Boston, MA SP Mat Res Soc AB Diffuse elastic scattering of electrons by single nanometer-sized defects in ion irradiated All has been measured quantitatively. Results are given for two dislocation loops and compared with published calculations to establish the loop geometry and interstitial or vacancy nature. Defect images using only diffuse scattering are achieved with high sensitivity and good resolution by a hollow-cone dark-field method. C1 Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA. RP Kirk, MA (reprint author), Argonne Natl Lab, Div Mat Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 4 TC 1 Z9 1 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-730-X J9 MATER RES SOC SYMP P PY 2004 VL 792 BP 229 EP 234 PG 6 WC Instruments & Instrumentation; Materials Science, Multidisciplinary; Nuclear Science & Technology SC Instruments & Instrumentation; Materials Science; Nuclear Science & Technology GA BY91P UT WOS:000189494300031 ER PT S AU Weber, WJ Gao, F Devanathan, R Jiang, WL Zhang, YW AF Weber, WJ Gao, F Devanathan, R Jiang, WL Zhang, YW BE Wang, LM Fromknecht, R Snead, LL Downey, DF Takahashi, H TI Experimental and computational studies of ion-solid interactions in silicon carbide SO RADIATION EFFECTS AND ION-BEAM PROCESSING OF MATERIALS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Radiation Effects and Ion-Beam Processing of Materials held at the 2003 MRS Fall Meeting CY DEC 01-05, 2003 CL Boston, MA SP Mat Res Soc ID ATOMIC-SCALE SIMULATIONS; COMPUTER-SIMULATION; MOLECULAR-DYNAMICS; INTERATOMIC POTENTIALS; DEFECT PRODUCTION; RECOVERY; CASCADE; DEVICES; AMORPHIZATION; ACCUMULATION AB Experimental and computational results on ion-beam-induced defect production, damage accumulation, and thermal recovery in SiC are reviewed. The accumulation and recovery of disorder on the Si and C sublattices have been determined experimentally by ion-channeling methods. Atomic-level simulations are used to determine defect production, cascade-overlap effects, and defect migration energies. Energetic Si and C collision cascades, with energies up to 50 keV, primarily produce single interstitials, mono-vacancies, antisite defects, and small defect clusters. Overlapping of Si and C cascades results in the interaction of defects and clusters that stimulates cluster growth and produces long-range structural disorder. For energetic An cascades, nanoscale amorphous clusters are produced directly within about 25% of the An cascades, along with point defects and smaller clusters. The disordering behavior and the changes in volume and elastic modulus obtained experimentally and from molecular dynamics simulations are in good agreement, thus providing atomic-level interpretation of experimentally observed features. Simulations of close-pair production and recombination in SiC indicate that the activation energies for recombination of most close pairs range from 0.24 to 0.38 eV. Multiaxial channeling measurements indicate annealing below 300 K results in relaxation of some interstitials to lower-energy configurations. Long-range migration energies for interstitials and vacancies have likewise been determined by computational methods. C1 Pacific NE Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA. RP Weber, WJ (reprint author), Pacific NE Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA. RI Gao, Fei/H-3045-2012; Devanathan, Ram/C-7247-2008 OI Devanathan, Ram/0000-0001-8125-4237 NR 39 TC 0 Z9 0 U1 0 U2 2 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-730-X J9 MATER RES SOC SYMP P PY 2004 VL 792 BP 261 EP 272 PG 12 WC Instruments & Instrumentation; Materials Science, Multidisciplinary; Nuclear Science & Technology SC Instruments & Instrumentation; Materials Science; Nuclear Science & Technology GA BY91P UT WOS:000189494300036 ER PT S AU Jiang, W Weber, WJ Wang, LM Sun, K AF Jiang, W Weber, WJ Wang, LM Sun, K BE Wang, LM Fromknecht, R Snead, LL Downey, DF Takahashi, H TI Dynamic recovery in an ion irradiated gallium nitride SO RADIATION EFFECTS AND ION-BEAM PROCESSING OF MATERIALS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Radiation Effects and Ion-Beam Processing of Materials held at the 2003 MRS Fall Meeting CY DEC 01-05, 2003 CL Boston, MA SP Mat Res Soc ID IMPLANTED GAN; DISORDER; DEFECTS AB Gallium nitride single crystals were irradiated using energetic Au2+ ions to two fluences at room temperature. Two different damage levels and depth profiles that are characterized by near-surface damage accumulation and deeper-region damage saturation were produced. Thermal annealing at 873 K resulted in disorder recovery only in the near-surface region at low fluence. However, simultaneous irradiation with 5.4 MeV Si2+ ions during annealing at 873 K induced significant recovery over the entire damage profile at both low and high fluences. Results from high-resolution transmission electron microscopy show recovery of the crystal structure in the highly disordered surface region following the Si2+ ion irradiation. The irradiation-assisted recovery is primarily attributed to defect-stimulated recovery and epitaxial recrystallization processes due to the creation of mobile Frenkel pairs. C1 Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA. RP Jiang, W (reprint author), Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA. RI Weber, William/A-4177-2008 OI Weber, William/0000-0002-9017-7365 NR 16 TC 0 Z9 0 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-730-X J9 MATER RES SOC SYMP P PY 2004 VL 792 BP 285 EP 290 PG 6 WC Instruments & Instrumentation; Materials Science, Multidisciplinary; Nuclear Science & Technology SC Instruments & Instrumentation; Materials Science; Nuclear Science & Technology GA BY91P UT WOS:000189494300039 ER PT S AU Usov, I Kvit, A Reitmeier, Z Davis, R AF Usov, I Kvit, A Reitmeier, Z Davis, R BE Wang, LM Fromknecht, R Snead, LL Downey, DF Takahashi, H TI Radiation damage characterization in Ar+ implanted GaN SO RADIATION EFFECTS AND ION-BEAM PROCESSING OF MATERIALS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Radiation Effects and Ion-Beam Processing of Materials held at the 2003 MRS Fall Meeting CY DEC 01-05, 2003 CL Boston, MA SP Mat Res Soc ID DOSE SI-IMPLANTATION; STRUCTURAL-ANALYSIS AB Damage microstructure evolution in GaN films implanted with argon ions (Ar+) as a function of implantation temperature was studied by cross-sectional transmission electron microscopy (TEM). After irradiation at room temperature, the implanted layer contained mostly isolated point defects. Implantation at elevated temperatures significantly reduced the number of isolated point defects. Numerous dislocations and regions exhibiting strain-contrast were observed after implantation at 300 degreesC. Bombardment at 600 degreesC resulted in formation of a new type of defect. Along with the partial dislocations and the strained regions, precipitates composed of carbon and nitrogen were identified by electron energy loss spectroscopy. These precipitates were formed in the vicinity of the Ar+ projected range where the amount of radiation damage was maximal. The high concentration of defects facilitated redistribution of carbon atoms introduced during the GaN film growth and resulted in the formation of precipitates. No precipitates were observed after implantation at 1000 degreesC. Consideration of the TEM results in conjunction with ion channeling data showed that presence of the precipitates correlated with a reverse annealing damage accumulation mode, which manifests itself as an increase of backscattering yield with increasing implantation temperature. The results of our study indicated that the carbon impurity in as-grown GaN films enhances the radiation damage accumulation rate and consequently has to be taken into account when ion implantation doping of GaN is performed. C1 Los Alamos Natl Lab, MST, STC, Los Alamos, NM 87545 USA. RP Usov, I (reprint author), Los Alamos Natl Lab, MST, STC, POB 1663, Los Alamos, NM 87545 USA. NR 11 TC 0 Z9 0 U1 0 U2 0 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-730-X J9 MATER RES SOC SYMP P PY 2004 VL 792 BP 345 EP 350 PG 6 WC Instruments & Instrumentation; Materials Science, Multidisciplinary; Nuclear Science & Technology SC Instruments & Instrumentation; Materials Science; Nuclear Science & Technology GA BY91P UT WOS:000189494300049 ER PT S AU Shutthanandan, V Zhang, Y Wang, CM Young, JS Saraf, L Thevuthasan, S AF Shutthanandan, V Zhang, Y Wang, CM Young, JS Saraf, L Thevuthasan, S BE Wang, LM Fromknecht, R Snead, LL Downey, DF Takahashi, H TI RBS, TEM and SEM characterization of gold nanoclusters in TiO2(110) SO RADIATION EFFECTS AND ION-BEAM PROCESSING OF MATERIALS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Radiation Effects and Ion-Beam Processing of Materials held at the 2003 MRS Fall Meeting CY DEC 01-05, 2003 CL Boston, MA SP Mat Res Soc ID MEV ION-IMPLANTATION; AU NANOCLUSTERS; COLLOIDAL AU; MGO; SILICA AB Nucleation of gold nanoclusters in TiO2(10) single crystal using ion implantation and subsequent annealing were studied by Rutherford backscattering spectrometry /channeling (RBS/C), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Approximately 1000 Au2+ /nm(2) were implanted at room temperature in TiO2 (110) substrates. TEM and SEM measurements reveal that rounded nanoclusters were formed during the implantation. In contrast, subsequent annealing in air for 10 hours at 1275 K promoted the formation of faceted (rectangular shaped) An nanostructures in TiO2. RBS channeling measurements further reveled that Au atoms randomly occupied. the host TiO2 lattice during the implantation. However, it appears that some An atoms moved to the Ti lattice positions after annealing. C1 Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA USA. RP Shutthanandan, V (reprint author), Pacific NW Natl Lab, Environm Mol Sci Lab, Richland, WA USA. NR 14 TC 0 Z9 0 U1 0 U2 2 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-730-X J9 MATER RES SOC SYMP P PY 2004 VL 792 BP 465 EP 470 PG 6 WC Instruments & Instrumentation; Materials Science, Multidisciplinary; Nuclear Science & Technology SC Instruments & Instrumentation; Materials Science; Nuclear Science & Technology GA BY91P UT WOS:000189494300068 ER PT S AU Devanathan, R Gao, F Weber, WJ AF Devanathan, R Gao, F Weber, WJ BE Wang, LM Fromknecht, R Snead, LL Downey, DF Takahashi, H TI Molecular dynamics simulation of point defect accumulation in 3C-SiC SO RADIATION EFFECTS AND ION-BEAM PROCESSING OF MATERIALS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Radiation Effects and Ion-Beam Processing of Materials held at the 2003 MRS Fall Meeting CY DEC 01-05, 2003 CL Boston, MA SP Mat Res Soc ID IRRADIATION-INDUCED AMORPHIZATION; SILICON-CARBIDE; TOPOLOGICAL DISORDER AB Defect accumulation in silicon carbide has been simulated by molecular dynamics using a Brenner-type potential connected smoothly to the Ziegler-Biersack-Littmark potential. Displacement damage in 3C-SiC, which is known to consist of point defects, vacancy and interstitial clusters and anti-site defects, was modelled by introducing random displacements on the Si or C sublattice. SiC was amorphized by Si displacements at a damage level corresponding to 0.15 displacements per atom (dpa) and by C displacements at 0.25 dpa. In both cases, the damage consists of Si and C Frenkel pairs as well as anti-site defects. The results provide evidence that SiC can be amorphized by displacing C atoms exclusively and suggest that short-range disorder provides the driving force for amorphization of SiC. C1 Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA. RP Devanathan, R (reprint author), Pacific NW Natl Lab, Fundamental Sci Directorate, Richland, WA 99352 USA. RI Weber, William/A-4177-2008; Gao, Fei/H-3045-2012 OI Weber, William/0000-0002-9017-7365; NR 23 TC 0 Z9 0 U1 1 U2 5 PU MATERIALS RESEARCH SOCIETY PI WARRENDALE PA 506 KEYSTONE DRIVE, WARRENDALE, PA 15088-7563 USA SN 0272-9172 BN 1-55899-730-X J9 MATER RES SOC SYMP P PY 2004 VL 792 BP 479 EP 484 PG 6 WC Instruments & Instrumentation; Materials Science, Multidisciplinary; Nuclear Science & Technology SC Instruments & Instrumentation; Materials Science; Nuclear Science & Technology GA BY91P UT WOS:000189494300070 ER PT S AU Gao, F Bylaska, EJ El-Azab, A Weber, WJ AF Gao, F Bylaska, EJ El-Azab, A Weber, WJ BE Wang, LM Fromknecht, R Snead, LL Downey, DF Takahashi, H TI Comparative study of defect properties in GaN: Ab initio and empirical potential calculations SO RADIATION EFFECTS AND ION-BEAM PROCESSING OF MATERIALS SE MATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS LA English DT Proceedings Paper CT Symposium on Radiation Effects and Ion-Beam Processing of Materials held at the 2003 MRS Fall Meeting CY DEC 01-05, 2003 CL Boston, MA SP Mat Res Soc ID GALLIUM NITRIDE; NATIVE DEFECTS; ENERGIES AB Density functional theory (DFF) is used to study the formation, properties and atomic configurations of monovacancies, antisite defects and possible interstitials in GaN. The relaxation around a vacancy is generally small, but the relaxation around antisite defects is large, particularly for a Ga antisite defect, which is not stable and converts to an N-N<0001> split interstitial. All N interstitials, starting from any possible site, eventually transfer into the N-N split interstitials, forming N-2 molecules with one N-N bond, but also some covalent bonds to the surrounding atoms. In the case of Ga interstitials, the most favorable configuration is the Ga octahedral interstitial. However, it is found that the Ga-Ga<1120> split interstitial can bridge the gap between non-bonded Ga atoms along the <1120> direction, which leads to the formation of Ga atomic wires in GaN, with bond distance (2.3 (A) over circle) close to those noted in bulk Ga. In addition, two representative potentials, namely Stillinger-Weber and Tersoff-Brenner potentials, have been employed to determine the formation of defects using molecular dynamics (MD) method in GaN. The MD results are discussed and compared to DFT calculations. The present DIFT and MD results provide guidelines for evaluating the quality and fit of empirical potentials for large-scale simulations of ion-solid interaction and thermal annealing of defects in GaN. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Gao, F (reprint author), Pacific NW Natl Lab, MS K8-93,POB 999, Richland, WA 99352 USA. RI Weber, William/A-4177-2008; Gao, Fei/H-3045-2012 OI Weber, William/0000-0002-9017-7365; NR 17 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 1-55899-730-X J9 MATER RES SOC SYMP P PY 2004 VL 792 BP 543 EP 548 PG 6 WC Instruments & Instrumentation; Materials Science, Multidisciplinary; Nuclear Science & Technology SC Instruments & Instrumentation; Materials Science; Nuclear Science & Technology GA BY91P UT WOS:000189494300078 ER PT J AU Lynch, TP Rivard, JW Garcia, S AF Lynch, TP Rivard, JW Garcia, S TI Estimated potassium content in Hanford workers SO RADIATION PROTECTION DOSIMETRY LA English DT Article ID K-40; POPULATION AB Potassium content in male and female workers at the US Department of Energy Hanford Site was estimated based on measurements made in 2002 of K-40 activity in the body. The K-40 activity in females ranged from 2.1 to 4.1 kBq with an average of 3.1+/-0.02 kBq. The total body potassium (TBK) content in females averaged 98+/-0.6 g. The K-40 activity in males ranged from 2.8 to 6.6 kBq with an average of 4.2+/-0.01 kBq and the average TBK was 136+/-0.3 g. The average TBK value for males aged 20-49 y was 140 g. The average TBK values for both genders decreased with age. The average potassium concentrations calculated for the different age ranges for males were 15-25% less than the value (1.9 gK per kg) obtained using the reported ICRP reference potassium and reference weight values. Potassium concentrations were inversely correlated with body-build index, body-mass index and body weight. These correlations could possibly be utilised to help assess the risk for disease. Future work is planned to evaluate whether monitoring of potassium concentrations could be used as a tool for the detection of diabetes and hypertension. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Lynch, TP (reprint author), Pacific NW Natl Lab, POB 999,Mailstop B1-60, Richland, WA 99352 USA. EM tim.lynch@pnl.gov NR 5 TC 2 Z9 2 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 111 IS 3 BP 319 EP 322 DI 10.1093/rpd/nch345 PG 4 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 868NF UT WOS:000224919600011 PM 15266079 ER PT J AU Zoetelief, J Bos, AJJ Schuhmacher, H McDonald, JC Schultz, FW Pihet, P AF Zoetelief, J Bos, AJJ Schuhmacher, H McDonald, JC Schultz, FW Pihet, P TI Advances in nuclear particle dosimetry for radiation protection and medicine - Ninth Symposium on Neutron Dosimetry SO RADIATION PROTECTION DOSIMETRY LA English DT Editorial Material C1 Delft Univ Technol, Interfac Reactor Inst, NL-2600 AA Delft, Netherlands. Pacific NW Natl Lab, Richland, WA USA. RP Zoetelief, J (reprint author), Delft Univ Technol, Interfac Reactor Inst, NL-2600 AA Delft, Netherlands. RI Bos, Adrie J.J./H-4781-2013 OI Bos, Adrie J.J./0000-0002-5849-7748 NR 0 TC 0 Z9 0 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 110 IS 1-4 SI SI BP 1 EP 3 DI 10.1093/rpd/nch236 PG 3 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 856PV UT WOS:000224058000001 ER PT J AU Miranda, JG DeLuca, PM Chadwick, MB AF Miranda, JG DeLuca, PM Chadwick, MB TI Ion chamber gas-to-wall conversion factors for fast neutron dosimetry SO RADIATION PROTECTION DOSIMETRY LA English DT Article; Proceedings Paper CT 9th Symposium on Neutron Dosimetry CY SEP 28-OCT 03, 2003 CL Delft Univ Technol, Delft, NETHERLANDS HO Delft Univ Technol ID PRESSURE PROPORTIONAL-COUNTERS; KERMA FACTORS; CROSS-SECTIONS; ENERGIES; CARBON; ALUMINUM AB Modern ionising photon dosimetry is essentially entirely based upon gas-filled cavity determinations. For photons, ion chamber response is largely independent of photon energy almost perfectly transforming absorbed dose in the gas to the surrounding media. Absolute uncertainties are <1-2%. For fast neutron dosimetry, this is certainly not the case. Interpretation of the response of the cavity filling material, usually a gas, to the charged particle spectrum induced in the walls and interacting with the cavity gas is fraught with uncertainties. Despite these challenges, gas filled cavities surrounded by various mixtures, compounds and elements, have proved to be essential for integral determinations of the indirectly ionising neutrons, generating dosimetric quantities, such as kerma and absorbed dose. The transformation from gas response to wall dose is material dependent and varies with neutron energy. This study discusses recent advances in cavity response interpretation using the results from complex nuclear modelling of microscopic cross sections as well as estimates of secondary particle production enabling much improved cavity gas-to-wall media conversion factors. C1 Univ Wisconsin, Sch Med, Madison, WI 53706 USA. 21st Century Oncol, Las Vegas, NV 89113 USA. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP DeLuca, PM (reprint author), Univ Wisconsin, Sch Med, 1300 Univ Ave,1208 MSC, Madison, WI 53706 USA. EM pmdeluca@wisc.edu NR 18 TC 0 Z9 0 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 110 IS 1-4 SI SI BP 15 EP 25 DI 10.1093/rpd/nch184 PG 11 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 856PV UT WOS:000224058000003 PM 15353616 ER PT J AU Agosteo, S Dimovasili, E Fasso, A Silari, M AF Agosteo, S Dimovasili, E Fasso, A Silari, M TI The response of a bonner sphere spectrometer to charged hadrons SO RADIATION PROTECTION DOSIMETRY LA English DT Article; Proceedings Paper CT 9th Symposium on Neutron Dosimetry CY SEP 28-OCT 03, 2003 CL Delft Univ Technol, Delft, NETHERLANDS HO Delft Univ Technol AB Bonner sphere spectrometers (BSSs) are employed in neutron spectrometry and dosimetry since many years. Recent developments have seen the addition to a conventional BSS of one or more detectors (moderator plus thermal neutron counter) specifically designed to improve the overall response of the spectrometer to neutrons above 10 MeV. These additional detectors employ a shell of material with a high mass number (such as lead) within the polyethylene moderator, in order to slow down high-energy neutrons via (n,xn) reactions. A BSS can be used to measure neutron spectra both outside accelerator shielding and from an unshielded target. Measurements were recently performed at CERN of the neutron yield and spectral fluence at various angles from unshielded, semi-thick copper, silver and lead targets, bombarded by a mixed proton/pion beam with 40 GeV per c momentum. These experiments have provided evidence that under certain circumstances, the use of lead-enriched moderators may present a problem: these detectors were found to have a significant response to the charged hadron component accompanying the neutrons emitted from the target. Conventional polyethylene moderators show a similar behaviour but less pronounced. These secondary hadrons interact with the moderator and generate neutrons, which are in turn detected by the counter. To investigate this effect and determine a correction factor to be applied to the unfolding procedure, a series of Monte Carlo simulations were performed with the FLUKA code. These simulations aimed at determining the response of the BSS to charged hadrons under the specific experimental situation. Following these results, a complete response matrix of the extended BSS to charged pions and protons was calculated with FLUKA. An experimental verification was carried out with a 120 GeV per c hadron beam at the CERF facility at CERN. C1 CESNEF, Politecn Milan, I-20133 Milan, Italy. CERN, CH-1211 Geneva 23, Switzerland. SLAC, Menlo Pk, CA 94025 USA. RP Agosteo, S (reprint author), CESNEF, Politecn Milan, Via Ponzio 34-3, I-20133 Milan, Italy. EM Stefano.agosteo@polimi.it NR 7 TC 7 Z9 7 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 110 IS 1-4 SI SI BP 161 EP 168 DI 10.1093/rpd/nch187 PG 8 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 856PV UT WOS:000224058000027 PM 15353640 ER PT J AU McLean, TD Olsher, RH Devine, RT AF McLean, TD Olsher, RH Devine, RT TI Development of a portable high-energy neutron spectrometer SO RADIATION PROTECTION DOSIMETRY LA English DT Article; Proceedings Paper CT 9th Symposium on Neutron Dosimetry CY SEP 28-OCT 03, 2003 CL Delft Univ Technol, Delft, NETHERLANDS HO Delft Univ Technol ID LIGHT PARTICLES; SCINTILLATOR; DETECTOR; SPECTRA; RANGE AB The design of a portable high-energy (20-800 MeV) neutron spectrometer based on CsI or BaF2 is described. The particle discrimination properties of these scintillators allow the light-ion spallation products (p, d, t and alpha) from neutron interactions to be identified uniquely. One or more of the resulting pulse-height spectra can be unfolded to reveal the incident neutron spectrum. Dosimetric quantities can then be calculated based on the unfolded spectrum. Due to the high stopping power of these scintillators, modest-sized crystals are suitable for this application. Combined with advances in electronics, a lightweight instrument capable of on-line particle discrimination with a real-time display of neutron-induced count rate is feasible. Preliminary experimental data are presented, and the importance of validating MCNPX-generated response functions is discussed. A brief discussion on future work follows. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP McLean, TD (reprint author), Los Alamos Natl Lab, HSR-4,POB 1663,MS J-573, Los Alamos, NM 87545 USA. EM tmclean@lanl.gov NR 15 TC 6 Z9 6 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 110 IS 1-4 SI SI BP 219 EP 222 DI 10.1093/rpd/nch126 PG 4 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 856PV UT WOS:000224058000035 PM 15353648 ER PT J AU Devine, RT AF Devine, RT TI Computation of cross sections and dose conversion factors for criticality accident dosimetry SO RADIATION PROTECTION DOSIMETRY LA English DT Article; Proceedings Paper CT 9th Symposium on Neutron Dosimetry CY SEP 28-OCT 03, 2003 CL Delft Univ Technol, Delft, NETHERLANDS HO Delft Univ Technol AB In the application of criticality accident dosemeters the cross sections and fluence-to-dose conversion factors have to be computed. The cross section and fluence-to-dose conversion factor for the thermal and epi-thermal contributions to neutron dose are well documented; for higher energy regions (>100 keV) these depend on the spectrum assumed. Fluence is determined using threshold detectors. The cross sections require the folding of an expected spectrum with the reaction cross sections. The fluence-to-dose conversion factors also require a similar computation. The true and effective thresholds are used to include the information on the expected spectrum. The spectra can either be taken from compendia or measured at the facility at which the exposures are to be expected. The cross sections can be taken from data computations or analytic representations and the fluence-to-dose conversion factors are determined by various standards making bodies. The problem remaining is the method of computation. The purpose of this paper is to compare two methods for computing these factors: analytic and Monte Carlo. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Devine, RT (reprint author), Los Alamos Natl Lab, G761, Los Alamos, NM 87545 USA. EM devine_r@lanl.gov NR 14 TC 2 Z9 2 U1 2 U2 2 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 110 IS 1-4 SI SI BP 491 EP 495 DI 10.1093/rpd/nch381 PG 5 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 856PV UT WOS:000224058000084 PM 15353697 ER PT J AU Mallett, MW McLean, TD Olsher, RH Romero, LL Seagraves, DT Devine, RT Eisele, SL Hoffman, JM Murphy, RO AF Mallett, MW McLean, TD Olsher, RH Romero, LL Seagraves, DT Devine, RT Eisele, SL Hoffman, JM Murphy, RO TI Multisphere default spectra - Solution spectrum and dosemeter response implications SO RADIATION PROTECTION DOSIMETRY LA English DT Article; Proceedings Paper CT 9th Symposium on Neutron Dosimetry CY SEP 28-OCT 03, 2003 CL Delft Univ Technol, Delft, NETHERLANDS HO Delft Univ Technol AB Initial calibration of a multisphere spectroscopy system has been completed at Los Alamos National Laboratory using four standard calibration scenarios. Spectrum unfolding was performed using three methods of constructing the default spectrum: simple parameter models, Monte Carlo calculations and physical measurement. Comparisons of the resulting spectra for each solution method are presented. Implications of the spectral solutions upon dosemeter characterisation are addressed. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Mallett, MW (reprint author), Los Alamos Natl Lab, HSR-4,MS G761,POB 1663, Los Alamos, NM 87545 USA. EM mallett@lanl.gov NR 3 TC 0 Z9 3 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 110 IS 1-4 SI SI BP 549 EP 553 DI 10.1093/rpd/nch240 PG 5 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 856PV UT WOS:000224058000094 PM 15353707 ER PT J AU Devine, RT Vigil, MM Martinez, WA AF Devine, RT Vigil, MM Martinez, WA TI Using operational equipment to read accident dosemeters SO RADIATION PROTECTION DOSIMETRY LA English DT Article; Proceedings Paper CT 9th Symposium on Neutron Dosimetry CY SEP 28-OCT 03, 2003 CL Delft Univ Technol, Delft, NETHERLANDS HO Delft Univ Technol AB Analysis of accident dosemeters usually involves the use of laboratory-based counting equipment. Gamma spectrometers are used for indium, copper and gold, and alpha-beta detectors for sulphur. This equipment is usually not easily transported due to the shielding required and the weight and delicacy of the counters. For intercomparison studies that require reading the dosemeters on site, a transportable system is required unless the site operating the study can count samples for all the participants. In the case of an actual accident these systems would have a difficulty in counting a large number of accident dosemeters. In an accident, personnel are usually subdivided according to their level of exposure. Those exposed to higher doses are treated immediately. An alternate system should be made available to handle the dosemeters worn by those personnel are likely to receive lower doses. Improvements in portable operational equipment for gamma and beta monitoring allow their use as spectrometers. Such a system was used for the SILENE intercomparison conducted at IRSN Vaiduc on 12 June and 19, 2002, and the preliminary results compared well with the other participants. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Devine, RT (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. EM devine_r@lanl.gov NR 5 TC 0 Z9 0 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 110 IS 1-4 SI SI BP 699 EP 700 DI 10.1093/rpb/nch178 PG 2 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 856PV UT WOS:000224058000120 PM 15353733 ER PT J AU Scherpelz, RI Traub, RJ Pryor, KH AF Scherpelz, RI Traub, RJ Pryor, KH TI Methodology for worker neutron exposure evaluation in the PDCF facility design SO RADIATION PROTECTION DOSIMETRY LA English DT Article; Proceedings Paper CT 9th Symposium on Neutron Dosimetry CY SEP 28-OCT 03, 2003 CL Delft Univ Technol, Delft, NETHERLANDS HO Delft Univ Technol AB A project headed by Washington Group International is meant to design the Pit Disassembly and Conversion Facility (PDCF) to convert the plutonium pits from excessed nuclear weapons into plutonium oxide for ultimate disposition. Battelle staff are performing the shielding calculations that will determine appropriate shielding so that the facility workers will not exceed target exposure levels. The target exposure levels for workers in the facility are 5 mSv y(-1) for the whole body and 100 mSv y(-1) for the extremity, which presents a significant challenge to the designers of a facility that will process tons of radioactive material. The design effort depended on shielding calculations to determine appropriate thickness and composition for glove box walls, and concrete wall thicknesses for storage vaults. Pacific Northwest National Laboratory (PNNL) staff used ORIGEN-S and SOURCES to generate gamma and neutron source terms, and Monte Carlo (computer code for) neutron photon (transport) (MCNP-4C) to calculate the radiation transport in the facility. The shielding calculations were performed by a team of four scientists, so it was necessary to develop a consistent methodology. There was also a requirement for the study to be cost-effective, so efficient methods of evaluation were required. The calculations were subject to rigorous scrutiny by internal and external reviewers, so acceptability was a major feature of the methodology. Some of the issues addressed in the development of the methodology included selecting appropriate dose factors, developing a method for handling extremity doses, adopting an efficient method for evaluating effective dose equivalent in a non-uniform radiation field, modelling the reinforcing steel in concrete, and modularising the geometry descriptions for efficiency. The relative importance of the neutron dose equivalent compared with the gamma dose equivalent varied substantially depending on the specific shielding conditions and lessons were learned from this effect. This paper addresses these issues and the resulting methodology. C1 Battelle Pacific NW Div, Richland, WA 99352 USA. RP Scherpelz, RI (reprint author), Battelle Pacific NW Div, POB 999, Richland, WA 99352 USA. EM scherpelz@pnl.gov NR 5 TC 0 Z9 0 U1 0 U2 2 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 110 IS 1-4 SI SI BP 725 EP 729 DI 10.1093/rpd/nch174 PG 5 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 856PV UT WOS:000224058000125 PM 15353738 ER PT J AU McDonald, JC AF McDonald, JC TI Current problems and expected improvements in personal neutron dosimetry SO RADIATION PROTECTION DOSIMETRY LA English DT Article; Proceedings Paper CT 9th Symposium on Neutron Dosimetry CY SEP 28-OCT 03, 2003 CL Delft Univ Technol, Delft, NETHERLANDS HO Delft Univ Technol ID FIELDS AB Many technological activities involve the potential for worker exposure to neutrons. The determination of neutron personal dose equivalent is difficult due to a number of factors including the materials and methods used to evaluate the response of personal dosemeters and the quantities for expressing dose equivalent. Nevertheless, recent progress has been made in the development of devices and techniques for the measurement and calibration of neutron personal dosemeters. The quantities and units used to express neutron dose equivalent are being improved and clarified. Therefore, it is expected that a number of remaining difficulties with neutron dosimetry will be mitigated. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP McDonald, JC (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM joe.mcdonald@pnl.gov NR 13 TC 1 Z9 1 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 110 IS 1-4 SI SI BP 743 EP 745 DI 10.1093/rpd/nch173 PG 3 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 856PV UT WOS:000224058000128 PM 15353741 ER PT J AU Galmarini, S Bianconi, R Klug, W Mikkelsen, T Addis, R Androllopoulos, S Astrup, P Baklanov, A Bartniki, J Bartzis, JC Bellasio, R Bompay, F Buckley, R Bouzom, M Champion, H D'Amours, R Davakis, E Eleveld, H Geertsema, GT Glaab, H Kollax, M Ilvonen, M Manning, A Pechinger, U Persson, C Polreich, E Potemski, S Prodanova, M Saltbones, J Slaper, H Sofiev, MA Syrakov, D Sorensen, JH Van der Auwera, L Valkama, I Zelazny, R AF Galmarini, S Bianconi, R Klug, W Mikkelsen, T Addis, R Androllopoulos, S Astrup, P Baklanov, A Bartniki, J Bartzis, JC Bellasio, R Bompay, F Buckley, R Bouzom, M Champion, H D'Amours, R Davakis, E Eleveld, H Geertsema, GT Glaab, H Kollax, M Ilvonen, M Manning, A Pechinger, U Persson, C Polreich, E Potemski, S Prodanova, M Saltbones, J Slaper, H Sofiev, MA Syrakov, D Sorensen, JH Van der Auwera, L Valkama, I Zelazny, R TI Can the confidence in long range atmospheric transport models be increased? The Pan-European experience of ENSEMBLE SO RADIATION PROTECTION DOSIMETRY LA English DT Article; Proceedings Paper CT International Symposium on Off-Site Nuclear Emergency Management CY SEP 29-OCT 03, 2003 CL Salzburg, AUSTRIA SP Fed Minist Agr, Forestry, Environm & Water Management, Forsch Zentrum Karlsruhe GmbH, European Commiss, Directorates Gen Res & Environm, US DOE, Off Int Emergency Co-Operat AB Is atmospheric dispersion forecasting an important asset of the early-phase nuclear emergency response management? Is there a 'perfect atmospheric dispersion model'? Is there a way to make the results of dispersion models more reliable and trustworthy? While seeking to answer these questions the multi-model ensemble dispersion forecast system ENSEMBLE will be presented. C1 Commiss European Communities, Joint Res Ctr, IES, REM, I-21020 Ispra, Italy. Environm Srl, I-20041 Agrate Brianza, Italy. Riso Natl Lab, Wind Energy Dep, DK-4000 Roskilde, Denmark. Univ Manchester, MBS, Manchester M15 6PB, Lancs, England. Savannah River Technol Ctr, Aiken, SC 29808 USA. NCSR Demokritos, Env Res Lab, Aghia Paraskevi 15310, Greece. Danish Meteorol Inst, DK-2100 Copenhagen, Denmark. Norwegian Meteorol Inst, N-0313 Oslo, Norway. METEOFRANCE, Environm Serv, F-31057 Toulouse, France. RIVM, Radiat Res Lab, Bilthoven, Netherlands. KNMI, NL-3730 AE De Bilt, Netherlands. German Weather Serv DWD, D-63004 Offenbach AM, Germany. Canadian Met Ctr, Dorval, PQ H9P 1J3, Canada. Met Off, Bracknell RG12 2SZ, Berks, England. SMHI, SE-60176 Norrkoping, Sweden. Cent Inst Meteor & Geodyn, A-1191 Vienna, Austria. Inst Atom Energy, Res Grp B1P, PL-05400 Otwock, Poland. NMHI, Sofia 1784, Bulgaria. KMI, B-1180 Brussels, Belgium. FMI, FIN-00810 Helsinki, Finland. VTT Processes, FIN-02044 Espoo, Finland. RP Galmarini, S (reprint author), Commiss European Communities, Joint Res Ctr, IES, REM, TP 321, I-21020 Ispra, Italy. EM stefano.galmarini@jrc.it RI Mikkelsen, Torben/E-7997-2010; Potempski, Slawomir/A-1401-2013; Mikkelsen, Torben/N-3123-2013; Sofiev, Mikhail/F-7606-2016 OI Potempski, Slawomir/0000-0002-3877-5464; Mikkelsen, Torben/0000-0002-5428-856X; Sofiev, Mikhail/0000-0001-9542-5746 NR 9 TC 14 Z9 14 U1 0 U2 3 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 109 IS 1-2 SI SI BP 19 EP 24 DI 10.1093/rpd/nch261 PG 6 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 841QW UT WOS:000222947500004 PM 15238650 ER PT J AU Jones, CR AF Jones, CR TI A United States perspective on long-term management of areas contaminated with radioactive materials SO RADIATION PROTECTION DOSIMETRY LA English DT Article; Proceedings Paper CT International Symposium on Off-Site Nuclear Emergency Management CY SEP 29-OCT 03, 2003 CL Salzburg, AUSTRIA SP Fed Minist Agr, Forestry, Environm & Water Management, Forsch Zentrum Karlsruhe GmbH, European Commiss, Directorates Gen Res & Environm, US DOE, Off Int Emergency Co-Operat AB The US has far-reaching and extensive experience in the long-term management of areas contaminated with radioactive materials. This experience base includes the Department of Energy's continued follow-up with Hiroshima and Nagasaki from the 1940s at the Radiological Effects Research Foundation in Hiroshima, Japan, the long-term management of the Marshall Islands Programme, the clean-up of the US nuclear weapons complex and the ongoing management of accident sites such as in Palomares, Spain. This paper discusses the lessons learnt and best practices gained from this far-reaching and extensive experience in the long-term management of areas contaminated with radioactive materials. C1 US DOE, Washington, DC 20585 USA. RP Jones, CR (reprint author), US DOE, Washington, DC 20585 USA. EM rick.jones@eh.doe.gov NR 0 TC 0 Z9 0 U1 2 U2 4 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 109 IS 1-2 SI SI BP 75 EP 77 DI 10.1093/rpd/nch255 PG 3 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 841QW UT WOS:000222947500014 PM 15238660 ER PT J AU Morrey, M Nisbet, A Thome, D Savkin, M Hoe, S Brynildsen, L AF Morrey, M Nisbet, A Thome, D Savkin, M Hoe, S Brynildsen, L TI Response in the late phase to a radiological emergency SO RADIATION PROTECTION DOSIMETRY LA English DT Article; Proceedings Paper CT International Symposium on Off-Site Nuclear Emergency Management CY SEP 29-OCT 03, 2003 CL Salzburg, AUSTRIA SP Fed Minist Agr, Forestry, Environm & Water Management, Forsch Zentrum Karlsruhe GmbH, European Commiss, Directorates Gen Res & Environm, US DOE, Off Int Emergency Co-Operat AB This paper looks at the key issues that need to be addressed during the transition from the emergency phase to the late phase of a radioactive release, and the development of the initial late phase strategy. It discusses the extent to which current national plans and international advice address the needs of decision makers following contamination of inhabited areas and food production systems. Based on this the following recommendations are made: (1) the issues that will arise at the start of the late phase response to a radioactive release require preparation work in advance of any release; (2) this preparation should consider the adequacy of legislation, technical data and modelling, options for waste storage and disposal, resources for monitoring and implementing clean up; (3) late phase preparedness requires regular exercising and (4) the possibility of terrorist releases adds further emphasis to the need for preparedness for the late phase. C1 Natl Radiol Protect Board, Didcot OX11 0RQ, Oxon, England. US DOE, Washington, DC 20585 USA. State Res Ctr, Inst Biophys, Moscow 123182, Russia. Danish Emergency Management Agcy, Nucl Div, DK-3460 Birkerod, Denmark. Minist Agr, Dept Food Prod & Plant & Anim Hlth, N-0030 Oslo, Norway. RP Morrey, M (reprint author), Natl Radiol Protect Board, Didcot OX11 0RQ, Oxon, England. EM mary.morrey@nrpb.org NR 20 TC 0 Z9 0 U1 0 U2 1 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 109 IS 1-2 SI SI BP 89 EP 96 DI 10.1093/rpd/nch242 PG 8 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 841QW UT WOS:000222947500017 PM 15238663 ER PT J AU Sullivan, TJ Chino, M Ehrhardt, J Shershakov, V AF Sullivan, TJ Chino, M Ehrhardt, J Shershakov, V TI International exchange of emergency phase information and assessments: An aid to national/international decision makers SO RADIATION PROTECTION DOSIMETRY LA English DT Article; Proceedings Paper CT International Symposium on Off-Site Nuclear Emergency Management CY SEP 29-OCT 03, 2003 CL Salzburg, AUSTRIA SP Fed Minist Agr, Forestry, Environm & Water Management, Forsch Zentrum Karlsruhe GmbH, European Commiss, Directorates Gen Res & Environm, US DOE, Off Int Emergency Co-Operat AB This paper discusses a collaborative project (1) to demonstrate the feasibility and benefit of a system seeking early review, in a 'quasi peer review' mode, of nuclear accident plume and dose assessment predictions by four major international nuclear accident emergency response systems before release of calculations to respective national authorities followed by (2) sharing these results with responsible national/international authorities, (3) development of an affordable/accessible system to distribute results to countries without prediction capabilities and (4) utilisation for exercises and collaboration studies. The project exploits Internet browser technology and low-cost PC hardware, incorporates an Internet node, with access control, for depositing a minimal set of XML-based graphics files for presentation in an identical map format. Side-by-side viewing and televideo conferencing will permit rapid evaluation, data elaboration and recalculation (if necessary) and should produce strong consensus among decision makers. Successful completion affords easy utilisation by national/international organisations and non-nuclear states at risk of trans-boundary incursion. C1 Lawrence Livermore Natl Lab, Natl Atmospher Release Advisory Ctr, Livermore, CA 94551 USA. Japan Atom Energy Res Inst, Res Grp Atmospher Environm, Tokai, Ibaraki 3191195, Japan. KFA Julich, Forschungszentrum, Inst Kern & Energietech, Accid Consequence Grp, D-76021 Karlsruhe, Germany. Fed Environm Emergency Response Ctr, SPA TYPHOON, Obninsk, Kaluga Region, Russia. RP Sullivan, TJ (reprint author), Lawrence Livermore Natl Lab, Natl Atmospher Release Advisory Ctr, L-103,POB 808, Livermore, CA 94551 USA. EM sullivan3@llnl.gov NR 1 TC 2 Z9 2 U1 2 U2 3 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 109 IS 1-2 SI SI BP 133 EP 136 DI 10.1093/rpd/nch241 PG 4 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 841QW UT WOS:000222947500025 PM 15238671 ER PT J AU Kelly, GN Jones, R Crick, MJ Weiss, W Morrey, M Lochard, J French, S AF Kelly, GN Jones, R Crick, MJ Weiss, W Morrey, M Lochard, J French, S TI Summary and conclusions: Capabilities and challenges SO RADIATION PROTECTION DOSIMETRY LA English DT Editorial Material C1 US DOE, Washington, DC 20585 USA. European Commiss, Brussels, Belgium. IAEA, Vienna, Austria. BfS, Munich, Germany. NRPB, Oxford, England. CEPN, Fontenay Aux Roses, France. Manchester Business Sch, Manchester M15 6PB, Lancs, England. RP Jones, R (reprint author), US DOE, Washington, DC 20585 USA. EM rick.jones@eh.doe.gov NR 0 TC 3 Z9 3 U1 0 U2 1 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 109 IS 1-2 SI SI BP 155 EP 164 DI 10.1093/rpd/nch271 PG 10 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 841QW UT WOS:000222947500031 PM 15238677 ER PT J AU McDonald, JC AF McDonald, JC TI Calibration measurements and standards for radiation protection dosimetry SO RADIATION PROTECTION DOSIMETRY LA English DT Article ID FIELDS AB The safe use of ionising radiation for applications in medicine, electric power production and industrial processes requires accurate measurements that are traceable to national standards. Radiological calibration laboratories provide measurements that may be used to determine the calibration coefficients for personal dosemeters and survey meters. The wide range of ionising radiation applications results in the need for a wide range of reference radiation types and intensities to be available in the calibration laboratory. The methods used and the problems encountered while developing reference radiations are discussed. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP McDonald, JC (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. EM joe.mcdonald@pnl.gov NR 23 TC 4 Z9 5 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 109 IS 4 BP 317 EP 321 DI 10.1093/rpd/nch308 PG 5 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 846SU UT WOS:000223337400009 PM 15273350 ER PT J AU Strom, DJ AF Strom, DJ TI Name those quantities SO RADIATION PROTECTION DOSIMETRY LA English DT Editorial Material C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Strom, DJ (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA. OI Strom, Daniel J/0000-0002-1710-3634 NR 11 TC 0 Z9 0 U1 0 U2 0 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 108 IS 3 BP 183 EP 185 DI 10.1093/rpd/nch021 PG 3 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 810IW UT WOS:000220699000001 PM 15031440 ER PT J AU Leggett, RW AF Leggett, RW TI A biokinetic model for carbon dioxide and bicarbonate. SO RADIATION PROTECTION DOSIMETRY LA English DT Article ID ENERGY-EXPENDITURE; C-13 BICARBONATE; FATTY-ACIDS; BREATH TEST; BOMB C-14; KINETICS; HUMANS; UREA; ELIMINATION; (CO2)-C-13 AB A systemic biokinetic model is presented for radiocarbon taken into the body as carbon dioxide or bicarbonate. Parameter values describing retention and excretion of carbon during the first few weeks after administration are based on studies of the fate of radiocarbon in human subjects after injection of labelled bicarbonate or inhalation of carbon dioxide. Data on laboratory animals administered labelled bicarbonate, carbonate or carbon dioxide provide information on the tissue distribution and long-term retention of carbon. Model predictions of the time-dependent distribution and retention of carbon differ considerably from those of models recommended by the International Commission on Radiological Protection. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Leggett, RW (reprint author), Oak Ridge Natl Lab, 1060 Commerce Pk, Oak Ridge, TN 37831 USA. EM rwl@ornl.gov NR 49 TC 8 Z9 8 U1 0 U2 1 PU OXFORD UNIV PRESS PI OXFORD PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND SN 0144-8420 J9 RADIAT PROT DOSIM JI Radiat. Prot. Dosim. PY 2004 VL 108 IS 3 BP 203 EP 213 DI 10.1093/rpd/nch028 PG 11 WC Environmental Sciences; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging SC Environmental Sciences & Ecology; Public, Environmental & Occupational Health; Nuclear Science & Technology; Radiology, Nuclear Medicine & Medical Imaging GA 810IW UT WOS:000220699000003 PM 15031442 ER PT J AU Guetersloh, SB Borak, TB Taddei, PJ Zeitlin, C Heilbronn, L Miller, J Murakami, T Iwata, Y AF Guetersloh, SB Borak, TB Taddei, PJ Zeitlin, C Heilbronn, L Miller, J Murakami, T Iwata, Y TI The response of a spherical tissue-equivalent proportional counter to different ions having similar linear energy transfer SO RADIATION RESEARCH LA English DT Article ID PARTICLES; CELLS; INACTIVATION AB The response of a tissue-equivalent proportional counter (TEPC) to different ions having a similar linear energy transfer (LET) has been studied. Three ions, N-14, Ne-20 and Si-28, were investigated using the HIMAC accelerator at the National Institute of Radiological Sciences at Chiba, Japan. The calculated linear energy transfer (LET.) of all ions was 44 +/- 2 keV/mum at the sensitive volume of the TEPC. A particle spectrometer was used to record the charge and position of each incident beam particle. This enabled reconstruction of the location of the track as it passed though the TEPC and ensured that the particle survived without fragmentation. The spectrum of energy deposition events in the TEPC could be evaluated as a function of trajectory through the TEPC. The data indicated that there are many events from particles that did not pass through the sensitive volume. The fraction of these events increased as the energy of the particle increased due to changes in the maximum energy of the 6 rays. Even though the LET of the incident particles was nearly identical, the frequency-averaged lineal energy, (y) over bar (F), as well as the dose-averaged lineal energy, (y) over bar (D), varied with the velocity of the incident particle. However, both values were within 15% of LET in all cases. (C) 2004 by Radiation Research Society. C1 Colorado State Univ, Dept Radiol Hlth Sci, Ft Collins, CO 80523 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. Natl Inst Radiol Sci, Dept Accelerator Phys & Engn, Inage Ku, Chiba 263, Japan. RP Borak, TB (reprint author), Colorado State Univ, Dept Radiol Hlth Sci, Ft Collins, CO 80523 USA. EM thomas.borak@colostate.edu RI Heilbronn, Lawrence/J-6998-2013; OI Heilbronn, Lawrence/0000-0002-8226-1057; Taddei, Phillip/0000-0002-4689-1625 FU NCI NIH HHS [5 T32 CA09236] NR 30 TC 14 Z9 14 U1 0 U2 8 PU RADIATION RESEARCH SOC PI OAK BROOK PA 820 JORIE BOULEVARD, OAK BROOK, IL 60523 USA SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD JAN PY 2004 VL 161 IS 1 BP 64 EP 71 DI 10.1667/RR3101 PG 8 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA 758HB UT WOS:000187627300008 PM 14680395 ER PT J AU Thompson, AC Blakely, EA Bjornstad, KA Chang, PY Rosen, CJ Sudar, D Schwarz, RI AF Thompson, AC Blakely, EA Bjornstad, KA Chang, PY Rosen, CJ Sudar, D Schwarz, RI TI Microbeam studies of low-dose X-ray bystander effects on epithelial cells and fibroblasts using synchrotron radiation SO RADIATION RESEARCH LA English DT Meeting Abstract CT 6th International Workshop/12th L H Gray Workshop on Microbeam Probes of Cellular Radiation Response CY MAR 29-31, 2003 CL ST CATHERINE COLL, OXFORD, ENGLAND HO ST CATHERINE COLL C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Adv Light Source, Berkeley, CA 94720 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Life Sci, Berkeley, CA 94720 USA. SRI Int, Menlo Pk, CA 94025 USA. NR 0 TC 4 Z9 5 U1 0 U2 2 PU RADIATION RESEARCH SOC PI OAK BROOK PA 820 JORIE BOULEVARD, OAK BROOK, IL 60523 USA SN 0033-7587 J9 RADIAT RES JI Radiat. Res. PD JAN PY 2004 VL 161 IS 1 BP 101 EP 102 PG 2 WC Biology; Biophysics; Radiology, Nuclear Medicine & Medical Imaging SC Life Sciences & Biomedicine - Other Topics; Biophysics; Radiology, Nuclear Medicine & Medical Imaging GA 758HB UT WOS:000187627300028 ER PT S AU Zaidi, MK GeSell, TF AF Zaidi, MK GeSell, TF BE Zaidi, MK Mustafaev, I TI Prevention of accidental exposures to radiodiagnostics and radiotherapy patients - Radiation safety aspects SO RADIATION SAFETY PROBLEMS IN THE CASPIAN REGION SE NATO Science Series IV-Earth and Environmental Sciences LA English DT Proceedings Paper CT NATO Advanced Research Workshop on Radiation Safety Problems in the Caspian Region CY SEP 11-14, 2003 CL Baku, AZERBAIJAN SP NATO Sci Comm, E E Fdn, Azerbaijan Natl Acad Sci DE medical radiation; radiation safety; x-rays; cancer ID CLINICAL-TRIALS AB New developments in the field of radiological equipment and prevention of accidental exposures to patients are being presented. The rapidly developing technologies provide valuable medical benefits to suffering patients. The consequent incorrect use of these machines increases the mistakes and incorrect doses. Clinical examinations should be performed with the lowest achievable radiation dose to the patient, consistent with diagnostic quality. A quality assurance program, implemented by dedicated people, could be a key to improved radiographic diagnoses and the prevention of accidental exposures in radiation therapy. C1 Radiol & Environm Sci Lab, Idaho Falls, ID USA. RP Radiol & Environm Sci Lab, Idaho Falls, ID USA. EM zaidimk@id.doe.gov NR 30 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER PI DORDRECHT PA PO BOX 17, 3300 AA DORDRECHT, NETHERLANDS SN 1568-1238 BN 1-4020-2376-6 J9 NATO SCI S SS IV EAR JI NATO Sci. Series IV Earth Environ. Sciences PY 2004 VL 41 BP 107 EP 120 PG 14 WC Nuclear Science & Technology SC Nuclear Science & Technology GA BBQ07 UT WOS:000227012000017 ER PT S AU Laue, CA Nash, KL AF Laue, CA Nash, KL BE Laue, CA Nash, KL TI One hundred years of development in radioanalytical chemistry as a science to probe the limits SO RADIOANALYTICAL METHODS IN INTERDISCIPLINARY RESEARCH: FUNDAMENTALS IN CUTTING-EDGE APPLICATIONS SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on Radioanalytical Methods at the Frontier of Interdisciplinary Science held at the 223rd National Meeting of the American-Chemical-Society CY APR 08-10, 2002 CL ORLANDO, FLORIDA SP Amer Chem Soc, Div Nucl Chem & Technol ID RADIOACTIVITY; DISCOVERY; HISTORY AB The development of radioanalytical chemistry as a science to probe the limits of our understanding of matter and the universe is tightly bound to the evolution of nuclear chemistry, nuclear physics and nuclear technology. The advancements that have been achieved in all of those areas as well as in nuclear medicine, a field presently attracting significant attention, would not have been possible without the steady progress that has been made in radioanalytical chemistry. The objective of this chapter is to highlight the important historic milestones that have led to the present state of the art in radioanalytical chemistry. C1 Lawrence Livermore Natl Lab, Analyt & Nucl Chem Div, Livermore, CA 94550 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Laue, CA (reprint author), Lawrence Livermore Natl Lab, Analyt & Nucl Chem Div, 7000 East Ave,L-231, Livermore, CA 94550 USA. NR 11 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 0-8412-3837-5 J9 ACS SYM SER PY 2004 VL 868 BP 2 EP 11 PG 10 WC Chemistry, Multidisciplinary; Chemistry, Analytical; Chemistry, Inorganic & Nuclear SC Chemistry GA BY28F UT WOS:000188742000001 ER PT S AU Vetter, K AF Vetter, K BE Laue, CA Nash, KL TI Realization and applications of collimator-less gamma-ray imaging systems SO RADIOANALYTICAL METHODS IN INTERDISCIPLINARY RESEARCH: FUNDAMENTALS IN CUTTING-EDGE APPLICATIONS SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on Radioanalytical Methods at the Frontier of Interdisciplinary Science held at the 223rd National Meeting of the American-Chemical-Society CY APR 08-10, 2002 CL ORLANDO, FLORIDA SP Amer Chem Soc, Div Nucl Chem & Technol ID EMISSION COMPUTED-TOMOGRAPHY; RADIATION-DOSIMETRY; DETECTORS; CAMERA; TELESCOPE; GRETA AB Due to advances in manufacturing large and highly segmented semi-conductor detectors, it is now possible to build efficient and compact gamma-ray imaging systems for gamma-ray energies up to several MeV. These new devices allow one to obtain positions and energies of individual gamma-ray interactions and enable the use of "Compton" tracking algorithms not only to determine the scattering sequence of the interactions, but also to determine the origin of the incident gamma rays. The main gain in this approach for localizing and characterizing gamma-ray sources is the increased sensitivity due to the removal of the collimator, which allows to significantly increase the efficiency while maintaining the spatial resolution even of ultra-high resolution collimators. The basic concept of gamma-ray imaging based on tracking and different possible approaches to optimize the sensitivity for different gamma-ray energies. will be presented. Applications in nuclear medicine to enhance cancer diagnostic but in particular therapeutic capabilities, in nuclear nonproliferation as well as in nuclear physics will be addressed. C1 Lawrence Livermore Natl Lab, Glenn T Seaborg Inst, Livermore, CA 94550 USA. RP Vetter, K (reprint author), Lawrence Livermore Natl Lab, Glenn T Seaborg Inst, 7000 East Ave, Livermore, CA 94550 USA. NR 22 TC 0 Z9 0 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 0-8412-3837-5 J9 ACS SYM SER PY 2004 VL 868 BP 52 EP 75 PG 24 WC Chemistry, Multidisciplinary; Chemistry, Analytical; Chemistry, Inorganic & Nuclear SC Chemistry GA BY28F UT WOS:000188742000005 ER PT S AU Martin, RC Glasgow, DC Martin, MZ AF Martin, RC Glasgow, DC Martin, MZ BE Laue, CA Nash, KL TI Applications of californium-252 neutron irradiations and other nondestructive examination methods at Oak Ridge National Laboratory SO RADIOANALYTICAL METHODS IN INTERDISCIPLINARY RESEARCH: FUNDAMENTALS IN CUTTING-EDGE APPLICATIONS SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on Radioanalytical Methods at the Frontier of Interdisciplinary Science held at the 223rd National Meeting of the American-Chemical-Society CY APR 08-10, 2002 CL ORLANDO, FLORIDA SP Amer Chem Soc, Div Nucl Chem & Technol ID FLUX AB The U.S. Department of Energy (DOE) program for the production and distribution of heavy (transplutonium) elements is described, along with the variety of applications for californium-252 (Cf-252) neutron sources and neutron irradiation experiments at the Californium User Facility for Neutron Science (CUF) at Oak Ridge National Laboratory (ORNL). ORNL's Radiochemical Engineering Development Center (REDC) is the center for the Transuranium. Element Processing Program (TEPP), which produces curium, berkelium, californium, einsteinium, and fermium for basic research, and the distribution of Cf-252 neutron sources for commercial and research applications., Capabilities for neutron and laser-based in situ nondestructive examination techniques for elemental analysis in the REDC and collaborative ORNL programs are also described. C1 Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA. Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA. RP Martin, RC (reprint author), Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA. RI Martin, Madhavi/A-5268-2011 NR 23 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 0-8412-3837-5 J9 ACS SYM SER PY 2004 VL 868 BP 88 EP 104 PG 17 WC Chemistry, Multidisciplinary; Chemistry, Analytical; Chemistry, Inorganic & Nuclear SC Chemistry GA BY28F UT WOS:000188742000007 ER PT S AU Laue, CA Smith, DK AF Laue, CA Smith, DK BE Laue, CA Nash, KL TI alpha-autoradiography: A simple method to monitor the migration of alpha-emitters in the environment SO RADIOANALYTICAL METHODS IN INTERDISCIPLINARY RESEARCH: FUNDAMENTALS IN CUTTING-EDGE APPLICATIONS SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on Radioanalytical Methods at the Frontier of Interdisciplinary Science held at the 223rd National Meeting of the American-Chemical-Society CY APR 08-10, 2002 CL ORLANDO, FLORIDA SP Amer Chem Soc, Div Nucl Chem & Technol ID NEVADA TEST-SITE; CONTAMINATED SOIL; HOT PARTICLES AB Environments contaminated with alpha-emitters (mostly actinides) represent a serious hazards to humans and nature. Current technologies to monitor and remediate areas contaminated with alpha-emitters are often hindered by our limited understanding of the actinide fate and transport behavior in those environments. Here we demonstrate how the well-established simple technique of alpha-autoradiography can be deployed in a field setting to enhance our understanding of actinide transport, to determine the spatial distribution of actinides in soils, and to help identify the morphology of the association of actinides with soil constituents. Preliminary conclusions are drawn relative to controls that govern the fate and transport of actinides that were deposited more than 40 years ago in the semi-arid soils of the Nevada Test Site. Our experimental data clearly indicate that actinides move through desert soils. This observation contradicts previous assumptions that actinides are relatively iminobile and remain within the very top soil layer. We were able to demonstrate that the designed tool can be applied for screening in monitoring and reniediation efforts. C1 Lawrence Livermore Natl Lab, Analyt & Nucl Chem Div, Livermore, CA 94550 USA. RP Laue, CA (reprint author), Lawrence Livermore Natl Lab, Analyt & Nucl Chem Div, 7000 East Ave, Livermore, CA 94550 USA. NR 24 TC 0 Z9 0 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 0-8412-3837-5 J9 ACS SYM SER PY 2004 VL 868 BP 121 EP 137 PG 17 WC Chemistry, Multidisciplinary; Chemistry, Analytical; Chemistry, Inorganic & Nuclear SC Chemistry GA BY28F UT WOS:000188742000009 ER PT S AU Nash, KL Chiarizia, R Borkowski, M Rickert, PG Otu, E AF Nash, KL Chiarizia, R Borkowski, M Rickert, PG Otu, E BE Laue, CA Nash, KL TI Radioanalytical techniques and the characterization of new separations reagents SO RADIOANALYTICAL METHODS IN INTERDISCIPLINARY RESEARCH: FUNDAMENTALS IN CUTTING-EDGE APPLICATIONS SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on Radioanalytical Methods at the Frontier of Interdisciplinary Science held at the 223rd National Meeting of the American-Chemical-Society CY APR 08-10, 2002 CL ORLANDO, FLORIDA SP Amer Chem Soc, Div Nucl Chem & Technol ID SOLVENT-EXTRACTION; AMERICIUM(III); N,P,P'-TRIOXIDE AB Radioanalytical chemistry has proven historically to be a sensitive tool for the elaboration of reaction stoichiometries and equilibrium thermodynamics in solvent extraction. The rapid turn around of analytical results, the ability to use of low concentrations of metal ions, and the small volumes of solutions required for the experiments combine to make these methods well-suited to guiding the development of new reagents. In this chapter, the basic principles of the classical technique of "slope analysis" for determining the stoichiometry of extracted metal complexes in solvent extraction are demonstrated through a discussion of the features of the extraction of Am3+ by several new organophosphorus complexants. Both the advantages of the techniques and the precautions that must be taken in their application and interpretation of results are demonstrated through these examples. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. Indiana Univ SE, Div Nat Sci, New Albany, IN 47150 USA. RP Nash, KL (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 17 TC 1 Z9 1 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 0-8412-3837-5 J9 ACS SYM SER PY 2004 VL 868 BP 140 EP 160 PG 21 WC Chemistry, Multidisciplinary; Chemistry, Analytical; Chemistry, Inorganic & Nuclear SC Chemistry GA BY28F UT WOS:000188742000010 ER PT S AU Dietz, ML AF Dietz, ML BE Laue, CA Nash, KL TI Recent progress in the development of extraction chromatographic methods for radionuclide separation and preconcentration SO RADIOANALYTICAL METHODS IN INTERDISCIPLINARY RESEARCH: FUNDAMENTALS IN CUTTING-EDGE APPLICATIONS SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on Radioanalytical Methods at the Frontier of Interdisciplinary Science held at the 223rd National Meeting of the American-Chemical-Society CY APR 08-10, 2002 CL ORLANDO, FLORIDA SP Amer Chem Soc, Div Nucl Chem & Technol ID SOLVENT-IMPREGNATED RESINS; CHELATE-FORMING RESIN; ANION-EXCHANGE RESIN; NUCLEAR-WASTE; CROWN-ETHER; SELECTIVE SEPARATION; BEARING MERCAPTO; METAL-IONS; AZO GROUPS; STRONTIUM AB Extraction chromatography (EXC), a form of liquid chromatography in which the stationary phase typically consists of an extractant solution sorbed on an inert support, provides a simple and effective means by which the separation and preconcentration of a variety of radionuclides and their isolation from major sample constituents can be achieved. Recent advances in extractant design, particularly the development of extractants capable of metal ion recognition or strong complex formation in acidic solution, have substantially improved the utility of the method. Advances in support design, particularly the introduction of functionalized supports capable of enhancing radionuclide retention or the stability of the chromatographic materials, promise to provide further improvements. C1 Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Dietz, ML (reprint author), Argonne Natl Lab, Div Chem, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 50 TC 3 Z9 3 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 0-8412-3837-5 J9 ACS SYM SER PY 2004 VL 868 BP 161 EP 176 PG 16 WC Chemistry, Multidisciplinary; Chemistry, Analytical; Chemistry, Inorganic & Nuclear SC Chemistry GA BY28F UT WOS:000188742000011 ER PT S AU Chamberlin, RM Ashley, KR Ball, JR Bauer, E Bernard, JG Berning, DE Schroeder, NC Sylvester, P AF Chamberlin, RM Ashley, KR Ball, JR Bauer, E Bernard, JG Berning, DE Schroeder, NC Sylvester, P BE Laue, CA Nash, KL TI Radioanalytical methods in the discovery and characterization of non-pertechnetate (Tc-99) species in Hanford tank wastes SO RADIOANALYTICAL METHODS IN INTERDISCIPLINARY RESEARCH: FUNDAMENTALS IN CUTTING-EDGE APPLICATIONS SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on Radioanalytical Methods at the Frontier of Interdisciplinary Science held at the 223rd National Meeting of the American-Chemical-Society CY APR 08-10, 2002 CL ORLANDO, FLORIDA SP Amer Chem Soc, Div Nucl Chem & Technol AB The existence of reduced technetium complexes in Hanford nuclear tank wastes was first proven using radioanalytical methods in anion exchange experiments. Subsequent efforts to understand the generation and stability of non-pertechnetate species in alkaline solution used radiochemistry in conjunction with spectroscopic methods. Collectively, the results indicate that aminocarboxylates such as EDTA- do not form stable Tc-99 complexes in strong base, while sugar derivatives such as gluconate support Tc(VII) reduction under a wide range of conditions, including realistic tank waste simulants. C1 Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA. Texas A&M Univ, Dept Chem, Commerce, TX 75429 USA. Lynntech Inc, College Stn, TX 77840 USA. RP Chamberlin, RM (reprint author), Los Alamos Natl Lab, Div Chem, POB 1663, Los Alamos, NM 87545 USA. EM rmchamberlin@lanl.gov RI Chamberlin, Rebecca/A-1335-2011 OI Chamberlin, Rebecca/0000-0001-6468-7778 NR 14 TC 3 Z9 3 U1 0 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 0-8412-3837-5 J9 ACS SYM SER PY 2004 VL 868 BP 177 EP 192 PG 16 WC Chemistry, Multidisciplinary; Chemistry, Analytical; Chemistry, Inorganic & Nuclear SC Chemistry GA BY28F UT WOS:000188742000012 ER PT S AU Du, MT Peretz, F Boll, RA Mirzadeh, S AF Du, MT Peretz, F Boll, RA Mirzadeh, S BE Laue, CA Nash, KL TI Thorium-229 for medical applications SO RADIOANALYTICAL METHODS IN INTERDISCIPLINARY RESEARCH: FUNDAMENTALS IN CUTTING-EDGE APPLICATIONS SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on Radioanalytical Methods at the Frontier of Interdisciplinary Science held at the 223rd National Meeting of the American-Chemical-Society CY APR 08-10, 2002 CL ORLANDO, FLORIDA SP Amer Chem Soc, Div Nucl Chem & Technol AB Medical researchers are assessing the ability of several alpha-emitting radioisotopes to treat cancer and reduce tumor. burden. In particular, Bi-213 (t(1/2) = 45.6 min) attached to tumor specific antibodies has been under clinical investigations for treatment of certain cancers. Bi-213 is a decay product of Ac-225 (t(1/2) = 10.0 d), itself an alpha emitter. Currently the domestically-produced Supply of Ac-225, however, is limited by the availability of the parent radionuclide, Th-229 (t(1/2) = 7340 y). Th-229, in turn, is a decay product of highly fissile U-233, Which is currently stored at ORNL and is now scheduled for long-term storage. In this paper we describe the primary separation of Th-229 from U-233 stockpile and further purification of this radioisotope from trace levels of uranium and plutonium. The chemical separation process is primarily based on the well known chemical behavior of these actinides on anion-exchange resins in both nitric and hydrochloric acid solutions. C1 Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA. RP Du, MT (reprint author), Oak Ridge Natl Lab, Nucl Sci & Technol Div, Oak Ridge, TN 37831 USA. RI Boll, Rose/C-4138-2016 OI Boll, Rose/0000-0003-2507-4834 NR 8 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 0-8412-3837-5 J9 ACS SYM SER PY 2004 VL 868 BP 193 EP 203 PG 11 WC Chemistry, Multidisciplinary; Chemistry, Analytical; Chemistry, Inorganic & Nuclear SC Chemistry GA BY28F UT WOS:000188742000013 ER PT S AU Semkow, TM Hafner, RS Parekh, PP Wozniak, GJ Haines, DK Husain, L Rabun, RL Williams, PG AF Semkow, TM Hafner, RS Parekh, PP Wozniak, GJ Haines, DK Husain, L Rabun, RL Williams, PG BE Laue, CA Nash, KL TI Study of traces of tritium at the World Trade Center SO RADIOANALYTICAL METHODS IN INTERDISCIPLINARY RESEARCH: FUNDAMENTALS IN CUTTING-EDGE APPLICATIONS SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on Radioanalytical Methods at the Frontier of Interdisciplinary Science held at the 223rd National Meeting of the American-Chemical-Society CY APR 08-10, 2002 CL ORLANDO, FLORIDA SP Amer Chem Soc, Div Nucl Chem & Technol ID TRITIATED-WATER; SORPTION AB Traces of tritiated water (HTO) were detected at the World Trade Center (WTC) ground zero after the 9/11/01 terrorist attack. A water sample from the WTC sewer, collected on 9/13/01, contained 0.164+/-0.074 (2sigma) nCi/L of HTO. A split water sample, collected on 9/21/01 from the basement of WTC Building 6, contained 3.53+/-0.17 and 2.83+/-0.15 nCi/L, respectively. These results are well below the levels of concern to human exposure. Several water and vegetation samples were analyzed from sites outside ground zero, located in Manhattan, Brooklyn, Queens, and the Kensico and Croton Reservoirs. No HTO above the background was found in those samples. Tritium radioluminescent (RL) devices were investigated as possible sources of the traces of tritium at ground zero. It was determined that the two Boeing 767 aircraft that hit the Twin Towers contained a combined 34 Ci of tritium at the time of impact in their emergency exit signs. There is also evidence that many weapons from law enforcement were present and destroyed at WTC. Such weaponry contains by design tritium sights. The fate and removal of tritium from ground zero were investigated, taking into consideration tritium chemistry and water flow originating from the fire fighting, rain, as well as leaks from the Hudson River and broken mains. A box model was developed to describe the above scenario. The model is consistent with instantaneous oxidation of the airplane tritium in the jet-fuel explosion, deposition of a small fraction of HTO at ground zero, and water-flow controlled removal of HTO from the debris. The model also suggests that tritium from the weapons would be released and oxidized to HTO at a much slower rate in the lingering fires at ground zero. C1 New York State Dept Hlth, Wadsworth Ctr, Albany, NY 12201 USA. SUNY Albany, Sch Publ Hlth, Albany, NY 12201 USA. Lawrence Livermore Natl Lab, Fiss Energy & Syst Safety Program, Livermore, CA 94551 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA. Westinghouse Savannah River Co, Tritium Engn Dept, Aiken, SC 29808 USA. Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA. RP Semkow, TM (reprint author), New York State Dept Hlth, Wadsworth Ctr, Albany, NY 12201 USA. NR 49 TC 0 Z9 0 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 0-8412-3837-5 J9 ACS SYM SER PY 2004 VL 868 BP 218 EP 234 PG 17 WC Chemistry, Multidisciplinary; Chemistry, Analytical; Chemistry, Inorganic & Nuclear SC Chemistry GA BY28F UT WOS:000188742000015 ER PT S AU Eaton, GF Hudson, GB Moran, JE AF Eaton, GF Hudson, GB Moran, JE BE Laue, CA Nash, KL TI Tritium-helium-3 age-dating of groundwater in the Livermore Valley of California SO RADIOANALYTICAL METHODS IN INTERDISCIPLINARY RESEARCH: FUNDAMENTALS IN CUTTING-EDGE APPLICATIONS SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on Radioanalytical Methods at the Frontier of Interdisciplinary Science held at the 223rd National Meeting of the American-Chemical-Society CY APR 08-10, 2002 CL ORLANDO, FLORIDA SP Amer Chem Soc, Div Nucl Chem & Technol ID SHALLOW GROUNDWATER; TRITIUM; CHLOROFLUOROCARBONS; TRACERS; HE-3 AB Tritium (H-3) is an ideal tracer for water since it is part of the water molecule. Its 12-year half-life is well suited for tracking the movement of young groundwater. Traditional methods for measuring tritium employ sensitive decay counting often preceded by isotopic enrichment of tritium using electrolysis. The introduction of He-3 mass spectrometry provides both a H-3 measurement technique and a radiometric dating technique for analyzing young groundwater. By measuring both the parent H-3 and daughter product He-3, we can estimate the age of groundwater; that is, the time since it was isolated from the atmosphere. These H-3-He groundwater ages are useful in constraining groundwater flow paths, flow rates, and in identifying recharge areas. We present examples of these methods for groundwater samples from the Livermore Valley in California. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Eaton, GF (reprint author), Lawrence Livermore Natl Lab, 7000 East Ave,L-231, Livermore, CA 94550 USA. NR 10 TC 1 Z9 1 U1 0 U2 2 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 0-8412-3837-5 J9 ACS SYM SER PY 2004 VL 868 BP 235 EP 245 PG 11 WC Chemistry, Multidisciplinary; Chemistry, Analytical; Chemistry, Inorganic & Nuclear SC Chemistry GA BY28F UT WOS:000188742000016 ER PT S AU Egorov, OB O'Hara, MJ Addleman, RS Grate, JW AF Egorov, OB O'Hara, MJ Addleman, RS Grate, JW BE Laue, CA Nash, KL TI Automation of radiochemical analysis: From groundwater monitoring to nuclear waste analysis SO RADIOANALYTICAL METHODS IN INTERDISCIPLINARY RESEARCH: FUNDAMENTALS IN CUTTING-EDGE APPLICATIONS SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on Radioanalytical Methods at the Frontier of Interdisciplinary Science held at the 223rd National Meeting of the American-Chemical-Society CY APR 08-10, 2002 CL ORLANDO, FLORIDA SP Amer Chem Soc, Div Nucl Chem & Technol ID PLASMA-MASS-SPECTROMETRY; ION CHROMATOGRAPHY; ACTINIDE ELEMENTS; FISSION-PRODUCTS; SEPARATION; PRECONCENTRATION; SAMPLES; TC-99; WATER AB In the current analytical practice determination of nongamma-emitting radionuclides relies on manual radiochemical analysis methods performed in centralized laboratories. Manual methods are not well suited to support nuclear waste processing and long-term environmental monitoring applications. Our research is directed at the development of chemical and instrumentation approaches towards automated radiochemical analysis and radionuclide-specific sensing. Our overall approach is based on integrating selective separation chemistries and radiation detection within a single functional sensor or analyzer device. This paper will present examples of selective radiometric sensing of beta- and alpha-emitters in water. Analysis of total Tc-99 and actinides in aged nuclear waste samples will be discussed as examples of automated analytical procedures and analyzer instruments. C1 Pacific NW Natl Lab, Richland, WA 99352 USA. RP Egorov, OB (reprint author), Pacific NW Natl Lab, 902 Battelle Blvd, Richland, WA 99352 USA. NR 24 TC 9 Z9 9 U1 1 U2 1 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 0-8412-3837-5 J9 ACS SYM SER PY 2004 VL 868 BP 246 EP 270 PG 25 WC Chemistry, Multidisciplinary; Chemistry, Analytical; Chemistry, Inorganic & Nuclear SC Chemistry GA BY28F UT WOS:000188742000017 ER PT S AU Glover, SE AF Glover, SE BE Laue, CA Nash, KL TI Determination of isotopic thorium in biological samples by combined alpha spectrometry and neutron activation analysis SO RADIOANALYTICAL METHODS IN INTERDISCIPLINARY RESEARCH: FUNDAMENTALS IN CUTTING-EDGE APPLICATIONS SE ACS SYMPOSIUM SERIES LA English DT Article; Proceedings Paper CT Symposium on Radioanalytical Methods at the Frontier of Interdisciplinary Science held at the 223rd National Meeting of the American-Chemical-Society CY APR 08-10, 2002 CL ORLANDO, FLORIDA SP Amer Chem Soc, Div Nucl Chem & Technol ID INDUCTIVELY-COUPLED PLASMA; MASS-SPECTROMETRY; ACTINIDES; URANIUM; TISSUES AB Thorium is a naturally occurring element for whom all isotopes are radioactive. Many of these isotopes are alpha emitting radionuclides, some of which have limits for inhalation lower than plutonium in current regulations. Neutron activation analysis can provide for the low-level determination of Th-232 but can not determine other isotopes of dosimetric importance. Biological and environmental samples often have large quantities of materials which activate strongly, limiting the capabilities of instrumental neutron activiation analysis. This paper will discuss the application of a combined technique using alpha spectrometry and radiochemical neutron activiation analysis for the determination of isotopic thorium. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Glover, SE (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA. RI WSU, USTUR/I-1056-2013 NR 19 TC 0 Z9 0 U1 0 U2 0 PU AMER CHEMICAL SOC PI WASHINGTON PA 1155 SIXTEENTH ST NW, WASHINGTON, DC 20036 USA SN 0097-6156 BN 0-8412-3837-5 J9 ACS SYM SER PY 2004 VL 868 BP 286 EP 297 PG 12 WC Chemistry, Multidisciplinary; Chemistry, Analytical; Chemistry, Inorganic & Nuclear SC Chemistry GA BY28F UT WOS:000188742000019 ER PT J AU Reimer, PJ AF Reimer, PJ TI From the guest editor SO RADIOCARBON LA English DT Editorial Material ID TIME-SCALE; CALIBRATION; WORKSHOP; SEA; KYR C1 Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA. RP Reimer, PJ (reprint author), Queens Univ Belfast, Sch Archaeol & Palaeoecol, Belfast BT7 1NN, Antrim, North Ireland. NR 11 TC 5 Z9 5 U1 1 U2 2 PU UNIV ARIZONA DEPT GEOSCIENCES PI TUCSON PA RADIOCARBON 4717 E FORT LOWELL RD, TUCSON, AZ 85712 USA SN 0033-8222 J9 RADIOCARBON JI Radiocarbon PY 2004 VL 46 IS 3 BP V EP VI PG 2 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 956ZF UT WOS:000231338100001 ER PT J AU Reimer, PJ Baillie, MGL Bard, E Bayliss, A Beck, JW Bertrand, CJH Blackwell, PG Buck, CE Burr, GS Cutler, KB Damon, PE Edwards, RL Fairbanks, RG Friedrich, M Guilderson, TP Hogg, AG Hughen, KA Kromer, B McCormac, G Manning, S Ramsey, CB Reimer, RW Remmele, S Southon, JR Stuiver, M Talamo, S Taylor, FW van der Plicht, J Weyhenmeyer, CE AF Reimer, PJ Baillie, MGL Bard, E Bayliss, A Beck, JW Bertrand, CJH Blackwell, PG Buck, CE Burr, GS Cutler, KB Damon, PE Edwards, RL Fairbanks, RG Friedrich, M Guilderson, TP Hogg, AG Hughen, KA Kromer, B McCormac, G Manning, S Ramsey, CB Reimer, RW Remmele, S Southon, JR Stuiver, M Talamo, S Taylor, FW van der Plicht, J Weyhenmeyer, CE TI IntCal04 terrestrial radiocarbon age calibration, 0-26 cal kyr BP SO RADIOCARBON LA English DT Article ID PRECISION C-14 MEASUREMENT; TREE-RING CHRONOLOGY; TIME-SCALE; MARINE SAMPLES; AD 1850-950; LAKE LISAN; IRISH OAKS; BC; PINE; WOOD AB A new calibration curve for the conversion of radiocarbon ages to calibrated (cal) ages has been constructed and internationally ratified to replace ImCal98, which extended from 0-24 cal kyr BP (Before Present, 0 cal BP = AD 1950). The new calibration data set for terrestrial samples extends from 0-26 cal kyr BP, but with much higher resolution beyond 11.4 cal kyr BP than ImCal98. Dendrochronologically-dated tree-ring samples cover the period from 0-12.4 cal kyr BP. Beyond the end of the tree rings, data from marine records (corals and foraminifera) are converted to the atmospheric equivalent with a site-specific marine reservoir correction to provide terrestrial calibration from 12.4-26.0 cal kyr BP. A substantial enhancement relative to ImCal98 is the introduction of a coherent statistical approach based on a random walk model, which takes into account the uncertainty in both the calendar age and the C-14 age to calculate the underlying calibration curve (Buck and Blackwell, this issue). The tree-ring data sets, sources of uncertainty, and regional offsets are discussed here. The marine data sets and calibration curve for marine samples from the surface mixed layer (Marine 04) are discussed in brief, but details are presented in Hughen et al. (this issue a). We do not make a recommendation for calibration beyond 26 cal kyr BP at this time; however, potential calibration data sets are compared in another paper (van der Plicht et al., this issue). C1 Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA. Queens Univ Belfast, Sch Archeol & Palaeoecol, Belfast BT7 1NN, Antrim, North Ireland. CEREGE, UMR 6635, F-13545 Aix En Provence, France. English Heritage, London W1S 2ET, England. Univ Arizona, Dept Phys, Tucson, AZ 85721 USA. Woods Hole Oceanog Inst, Dept Marine Chem & Geochem, Woods Hole, MA 02543 USA. Univ Sheffield, Dept Stat & Probabil, Sheffield S3 7RH, S Yorkshire, England. Univ Minnesota, Dept Geol & Geophys, Minneapolis, MN USA. Columbia Univ, Lamont Doherty Geol Observ, Palisades, NY 10964 USA. Inst Bot 210, D-70593 Stuttgart, Germany. Univ Waikato, Radiocarbon Dating Lab, Hamilton, New Zealand. Heidelberger Akad Wissensch, D-69120 Heidelberg, Germany. Univ Toronto, Dept Fine Art, Toronto, ON M5S 3G3, Canada. Univ Reading, Dept Archaeol, Reading RG6 6AB, Berks, England. Univ Oxford, Oxford Radiocarbon Accelerator Unit, Oxford OX2 6JB, England. Univ Calif Santa Cruz, Ocean Sci Dept, Santa Cruz, CA 92697 USA. Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA. Univ Washington, Quaternary Isotope Lab, Seattle, WA 98195 USA. Univ Texas, Inst Geophys, Austin, TX 78712 USA. Univ Groningen, Ctr Isotope Res, NL-9747 AG Groningen, Netherlands. Leiden Univ, Fac Archaeol, NL-2300 RA Leiden, Netherlands. RP Reimer, PJ (reprint author), Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, L-397, Livermore, CA 94550 USA. RI Taylor, Frederick/A-2195-2009; Bronk Ramsey, Christopher/A-3277-2012; van der Plicht, Johannes/B-9994-2013; Bard, Edouard/G-7717-2014; Reimer, Paula/I-5915-2015; Blackwell, Paul/F-2885-2017 OI Blackwell, Paul/0000-0002-3141-4914 NR 41 TC 2778 Z9 2898 U1 15 U2 136 PU UNIV ARIZONA DEPT GEOSCIENCES PI TUCSON PA RADIOCARBON 4717 E FORT LOWELL RD, TUCSON, AZ 85712 USA SN 0033-8222 J9 RADIOCARBON JI Radiocarbon PY 2004 VL 46 IS 3 BP 1029 EP 1058 PG 30 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 956ZF UT WOS:000231338100003 ER PT J AU Hughen, KA Baillie, MGL Bard, E Beck, JW Bertrand, CJH Blackwell, PG Buck, CE Burr, GS Cutler, KB Damon, PE Edwards, RL Fairbanks, RG Friedrich, M Guilderson, TP Kromer, B McCormac, G Manning, S Ramsey, CB Reimer, PJ Reimer, RW Remmele, S Southon, JR Stuiver, M Talamo, S Taylor, FW van der Plicht, J Weyhenmeyer, CE AF Hughen, KA Baillie, MGL Bard, E Beck, JW Bertrand, CJH Blackwell, PG Buck, CE Burr, GS Cutler, KB Damon, PE Edwards, RL Fairbanks, RG Friedrich, M Guilderson, TP Kromer, B McCormac, G Manning, S Ramsey, CB Reimer, PJ Reimer, RW Remmele, S Southon, JR Stuiver, M Talamo, S Taylor, FW van der Plicht, J Weyhenmeyer, CE TI Marine04 marine radiocarbon age calibration, 0-26 cal kyr BP SO RADIOCARBON LA English DT Article ID ACCELERATOR MASS-SPECTROMETRY; NORTH-ATLANTIC; LAST DEGLACIATION; YOUNGER-DRYAS; RESERVOIR CORRECTIONS; ATMOSPHERIC CO2; LATE HOLOCENE; INDIAN-OCEAN; TH-230 AGES; C-14 AGES AB New radiocarbon calibration curves, IntCal04 and Marine04, have been constructed and internationally ratified to replace the terrestrial and marine components of IntCal98. The new calibration data sets extend an additional 2000 yr, from 0-26 cal kyr BP (Before Present, 0 cal. BP = AD 1950), and provide much higher resolution, greater precision, and more detailed structure than IntCal98. For the Marine04 curve, dendrochronologically-dated tree-ring samples, converted with a box diffusion model to marine mixed-layer ages, cover the period from 0-10.5 call kyr BR Beyond 10.5 cal kyr BP, high-resolution marine data become available from foraminifera in varved sediments and U/Th-dated corals. The marine records are corrected with site-specific C-14 reservoir age information to provide a single global marine mixed-layer calibration from 10.5-26.0 cal kyr BR A substantial enhancement relative to IntCal98 is the introduction of a random walk model, which takes into account the uncertainty in both the calendar age and the C-14 age to calculate the underlying calibration curve (Buck and Blackwell, this issue). The marine data sets and calibration curve for marine samples from the surface mixed layer (Marine04) are discussed here. The tree-ring data sets, sources of uncertainty, and regional offsets are presented in detail in a companion paper by Reimer et al. (this issue). C1 Woods Hole Oceanog Inst, Dept Marine Chem & Geochem, Woods Hole, MA 02543 USA. Queens Univ Belfast, Sch Archaeol & Palaeoecol, Belfast BT7 1NN, Antrim, North Ireland. CEREGE, UMR 6635, F-13545 Aix En Provence, France. Univ Arizona, Dept Phys, Tucson, AZ 85721 USA. Univ Sheffield, Dept Probabil & Stat, Sheffield S3 7RH, S Yorkshire, England. Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA. US Dept State, Off Senior Coordinator Nucl Safety, Washington, DC 20520 USA. Univ Minnesota, Dept Geol & Geophys, Minneapolis, MN USA. Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA. Univ Hohenheim, Inst Bot, D-70593 Stuttgart, Germany. Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA. Heidelberger Akad Wissensch, D-69120 Heidelberg, Germany. Univ Toronto, Dept Fine Art, Toronto, ON M5S 3G3, Canada. Univ Reading, Dept Archaeol, Reading RG6 6AB, Berks, England. Oxford Radiocarbon Accelerator Unit, Oxford OX2 6BJ, England. Univ Calif Santa Cruz, Dept Ocean Sci, Santa Cruz, CA 92697 USA. Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA. Univ Washington, Quaternary Isotope Lab, Seattle, WA 98195 USA. Univ Texas, Inst Geophys, Austin, TX 78712 USA. Univ Groningen, Ctr Isotope Res, NL-9747 AG Groningen, Netherlands. Leiden Univ, Fac Archaeol, NL-2300 RA Leiden, Netherlands. RP Hughen, KA (reprint author), Woods Hole Oceanog Inst, Dept Marine Chem & Geochem, Woods Hole, MA 02543 USA. RI Taylor, Frederick/A-2195-2009; Bronk Ramsey, Christopher/A-3277-2012; van der Plicht, Johannes/B-9994-2013; Bard, Edouard/G-7717-2014; Reimer, Paula/I-5915-2015; Blackwell, Paul/F-2885-2017 OI Blackwell, Paul/0000-0002-3141-4914 NR 38 TC 818 Z9 858 U1 5 U2 50 PU UNIV ARIZONA DEPT GEOSCIENCES PI TUCSON PA RADIOCARBON 4717 E FORT LOWELL RD, TUCSON, AZ 85712 USA SN 0033-8222 J9 RADIOCARBON JI Radiocarbon PY 2004 VL 46 IS 3 BP 1059 EP 1086 PG 28 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 956ZF UT WOS:000231338100004 ER PT J AU McCormac, FG Hogg, AG Blackwell, PG Buck, CE Higham, TFG Reimer, PJ AF McCormac, FG Hogg, AG Blackwell, PG Buck, CE Higham, TFG Reimer, PJ TI SHCal04 Southern Hemisphere calibration, 0-11.0 cal kyr BP SO RADIOCARBON LA English DT Article ID NORTHEASTERN BRAZIL; AD 1850-950; RADIOCARBON; MARINE; SCALE AB Recent measurements on dendrochronologically-dated wood from the Southern Hemisphere have shown that there are differences between the structural form of the radiocarbon calibration curves from each hemisphere. Thus, it is desirable, when possible, to use calibration data obtained from secure dendrochronologically-dated wood from the corresponding hemisphere. In this paper, we outline the recent work and point the reader to the internationally recommended data set that should be used for future calibration of Southern Hemisphere C-14 dates. C1 Queens Univ Belfast, Sch Archaeol & Palaeoecol, Belfast BT7 1NN, Antrim, North Ireland. Univ Waikato, Radiocarbon Dating Lab, Hamilton, New Zealand. Univ Sheffield, Dept Probabil & Stat, Sheffield S3 7RH, S Yorkshire, England. Oxford Radiocarbon Accelerator Unit, Oxford OX2 6JB, England. Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry L 397, Livermore, CA 94550 USA. RP McCormac, FG (reprint author), Queens Univ Belfast, Sch Archaeol & Palaeoecol, Belfast BT7 1NN, Antrim, North Ireland. EM f.mccormac@qub.ac.uk RI Reimer, Paula/I-5915-2015; Blackwell, Paul/F-2885-2017 OI Blackwell, Paul/0000-0002-3141-4914 NR 20 TC 715 Z9 733 U1 4 U2 34 PU UNIV ARIZONA DEPT GEOSCIENCES PI TUCSON PA RADIOCARBON 4717 E FORT LOWELL RD, TUCSON, AZ 85712 USA SN 0033-8222 J9 RADIOCARBON JI Radiocarbon PY 2004 VL 46 IS 3 BP 1087 EP 1092 PG 6 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 956ZF UT WOS:000231338100005 ER PT J AU Vogel, JS Ognibene, T Palmblad, M Reimer, P AF Vogel, JS Ognibene, T Palmblad, M Reimer, P TI Counting statistics and ion interval density in AMS SO RADIOCARBON LA English DT Article ID ACCELERATOR MASS-SPECTROMETRY; RADIOCARBON CALIBRATION; BIOCHEMICAL SAMPLES; YR BP; C-14; GRAPHITE; FRACTIONATION; SYSTEM AB Confidence in the precisions of accelerator mass spectrometry (AMS) and decay measurements must be comparable for the application of the radiocarbon calibration to age determinations using both technologies. We confirmed the random nature Of the temporal distribution of C-14 ions in an AMS spectrometer for a number of sample counting rates and properties of the sputtering process. The temporal distribution of ion counts was also measured to confirm the applicability of traditional counting statistics. C1 Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94551 USA. RP Vogel, JS (reprint author), Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94551 USA. EM jsvogel@llnl.gov RI Palmblad, Magnus/B-8649-2016 OI Palmblad, Magnus/0000-0002-5865-8994 NR 26 TC 10 Z9 10 U1 0 U2 1 PU UNIV ARIZONA DEPT GEOSCIENCES PI TUCSON PA RADIOCARBON 4717 E FORT LOWELL RD, TUCSON, AZ 85712 USA SN 0033-8222 J9 RADIOCARBON JI Radiocarbon PY 2004 VL 46 IS 3 BP 1103 EP 1109 PG 7 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 956ZF UT WOS:000231338100007 ER PT J AU Hughen, KA Southon, JR Bertrand, CJH Frantz, B Zermeno, P AF Hughen, KA Southon, JR Bertrand, CJH Frantz, B Zermeno, P TI Cariaco basin calibration update: Revisions to calendar and C-14 chronologies for core PL07-58PC SO RADIOCARBON LA English DT Article ID RADIOCARBON; AMS AB Calibration of the radiocarbon time scale is critical in order to fully utilize this important dating tool as a tracer of geochemical and geophysical processes. Tree-ring chronologies provide high-resolution calibration back to similar to 12,400 cal BP (Friedrich et al., this issue), but dendrochronologies beyond that age are currently "floating" and not anchored in absolute age (Kromer et al., this issue). For the previous IntCal98 data set (Stuiver et al. 1998), high-resolution calibration data older than tree rings were provided by Cariaco Basin piston core PL07-PC56 (Hughen et al. 1998). Core 56PC was selected for C-14 dating from a suite of 4 adjacent piston cores, mostly due to the quality of its high-resolution grayscale record. The core was sampled every 10 cm, yielding approximately 100- to 200-yr resolution. Cariaco piston core PL07-58PC, on the other hand, has a similar to 25% higher deposition rate than 56PC (Peterson et al. 1990). Core 58PC was sampled every 1.5 cm, providing C-14 calibration at 10-15 yr resolution throughout the period of deglaciation, similar to 10,500-14,700 cal BP (Hughen et al. 2000). Until now, however, these data were never converted into a smoothed curve or combined with other data sets for use in calibration. The methodologies for combining 58PC data with tree-ring and coral data for the IntCal04 atmospheric and marine C-14 calibration curves are described elsewhere in this volume (Reimer et al., this issue; Hughen et al., this issue). Here, we present the updated anchoring of the floating Cariaco varve chronology to the revised and extended German pine chronology (Friedrich et al., this issue). In addition, we detail the changes made to the calendar age varve chronology between the publication of the 56PC and 58pC C-14 calibrations, and summarize the C-14 sample treatment and statistics for accelerator mass spectrometry (AMS) measurement of blanks and small samples for this work. C1 Woods Hole Oceanog Inst, Dept Marine Chem & Geochem, Woods Hole, MA 02543 USA. Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA USA. Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA. RP Hughen, KA (reprint author), Woods Hole Oceanog Inst, Dept Marine Chem & Geochem, Woods Hole, MA 02543 USA. EM khughen@whoi.edu NR 17 TC 32 Z9 36 U1 1 U2 5 PU UNIV ARIZONA DEPT GEOSCIENCES PI TUCSON PA RADIOCARBON 4717 E FORT LOWELL RD, TUCSON, AZ 85712 USA SN 0033-8222 J9 RADIOCARBON JI Radiocarbon PY 2004 VL 46 IS 3 BP 1161 EP 1187 PG 27 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 956ZF UT WOS:000231338100011 ER PT J AU van der Plicht, J Beck, JW Bard, E Baillie, MGL Blackwell, PG Buck, CE Friedrich, M Guilderson, TP Hughen, KA Kromer, B McCormac, FG Ramsey, CB Reimer, PJ Reimer, RW Remmele, S Richards, DA Southon, JR Stuiver, M Weyhenmeyer, CE AF van der Plicht, J Beck, JW Bard, E Baillie, MGL Blackwell, PG Buck, CE Friedrich, M Guilderson, TP Hughen, KA Kromer, B McCormac, FG Ramsey, CB Reimer, PJ Reimer, RW Remmele, S Richards, DA Southon, JR Stuiver, M Weyhenmeyer, CE TI NotCal04 - Comparison/calibration C-14 records 26-50 cal kyr BP SO RADIOCARBON LA English DT Article ID ATMOSPHERIC RADIOCARBON CALIBRATION; LAKE LISAN; SEA; CIRCULATION; SEDIMENTS; CORALS; MIDDLE; SCALE; DATES; AGES AB The radiocarbon calibration curve ImCal04 extends back to 26 cal kyr BP. While several high-resolution records exist beyond this limit, these data sets exhibit discrepancies of up, to several millennia. As a result, no calibration curve for the time range 26-50 cal kyr BP can be recommended as yet, but in this paper the IntCal04 working group compares the available data sets and offers a discussion of the information that they hold. C1 Univ Groningen, Ctr Isotope Res, NL-9747 AG Groningen, Netherlands. Leiden Univ, Fac Archaeol, NL-2300 RA Leiden, Netherlands. Univ Arizona, Dept Phys, AMS Lab, NSF, Tucson, AZ 85721 USA. CEREGE, UMR 6635, F-13545 Aix En Provence, France. Queens Univ Belfast, Sch Archaeol & Palaeoecol, Belfast BT7 1NN, Antrim, North Ireland. Univ Sheffield, Dept Probabil & Stat, Sheffield S3 7RH, S Yorkshire, England. Univ Hohenheim, Inst Bot, D-70593 Stuttgart, Germany. Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry L 397, Livermore, CA 94550 USA. Woods Hole Oceanog Inst, Dept Marine Chem & Geochem, Woods Hole, MA 02543 USA. Heidelberger Akad Wissensch, D-69120 Heidelberg, Germany. Oxford Radiocarbon Accelerator Unit, Oxford OX2 6JB, England. Univ Bristol, Sch Geog Sci, Bristol BS8 1SS, Avon, England. Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA. Univ Washington, Quaternary Isotope Lab, Seattle, WA 98195 USA. RP van der Plicht, J (reprint author), Univ Groningen, Ctr Isotope Res, NL-9747 AG Groningen, Netherlands. EM J.van.der.Plicht@r-ug.nl RI Richards, David/B-7298-2008; Bronk Ramsey, Christopher/A-3277-2012; van der Plicht, Johannes/B-9994-2013; Bard, Edouard/G-7717-2014; Reimer, Paula/I-5915-2015; Blackwell, Paul/F-2885-2017 OI Richards, David/0000-0001-8389-8079; Blackwell, Paul/0000-0002-3141-4914 NR 30 TC 105 Z9 110 U1 1 U2 10 PU UNIV ARIZONA DEPT GEOSCIENCES PI TUCSON PA RADIOCARBON 4717 E FORT LOWELL RD, TUCSON, AZ 85712 USA SN 0033-8222 J9 RADIOCARBON JI Radiocarbon PY 2004 VL 46 IS 3 BP 1225 EP 1238 PG 14 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 956ZF UT WOS:000231338100015 ER PT J AU Reimer, PJ Brown, TA Reimer, RW AF Reimer, PJ Brown, TA Reimer, RW TI Discussion: Reporting and calibration of post-bomb C-14 data SO RADIOCARBON LA English DT Editorial Material ID ORGANIC RESIDUES; RADIOCARBON; AGE; OCEAN; TERRESTRIAL; VARIABILITY; ACCELERATOR; DYNAMICS; HISTORY; CORALS AB The definitive paper by Stuiver and Polach (1977) established the conventions for reporting of radiocarbon data for chronological and geophysical studies based on the radioactive decay of C-14 in the sample since the year of sample death or formation. Several ways of reporting C-14 activity levels relative to a standard were also established, but no specific instructions were given for reporting nuclear weapons-testing (post-bomb) C-14 levels in samples. Because the use of postbomb C-14 is becoming more prevalent in forensics, biology, and geosciences, a convention needs to be adopted. We advocate the use of fraction modern with a new symbol (FC)-C-14 to prevent confusion with the previously used Fro, which may or may not have been fractionation-corrected. We also discuss the calibration of post-bomb 14C samples and the available data sets and compilations, but do not give a recommendation for a particular data set. C1 Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA. Queens Univ Belfast, Belfast BT7 1NN, Antrim, North Ireland. Univ Calif Santa Cruz, Ocean Sci Dept, Santa Cruz, CA 92697 USA. RP Reimer, PJ (reprint author), Lawrence Livermore Natl Lab, Ctr Accelerator Mass Spectrometry, Livermore, CA 94550 USA. EM P.J.Reimer@qub.ac.uk RI Reimer, Paula/I-5915-2015 NR 37 TC 263 Z9 270 U1 6 U2 58 PU UNIV ARIZONA DEPT GEOSCIENCES PI TUCSON PA RADIOCARBON 4717 E FORT LOWELL RD, TUCSON, AZ 85712 USA SN 0033-8222 J9 RADIOCARBON JI Radiocarbon PY 2004 VL 46 IS 3 BP 1299 EP 1304 PG 6 WC Geochemistry & Geophysics SC Geochemistry & Geophysics GA 956ZF UT WOS:000231338100019 ER PT J AU Suzuki, Y Kelly, SD Kemner, KM Banfield, JF AF Suzuki, Y Kelly, SD Kemner, KM Banfield, JF TI Enzymatic U(VI) reduction by Desulfosporosinus species SO RADIOCHIMICA ACTA LA English DT Article DE desulfosporosinus; uranium reduction; sulfate-reducing bacteria; spore-forming; gram-positive ID SULFATE-REDUCING BACTERIA; DESULFOVIBRIO-DESULFURICANS; DESULFOTOMACULUM-ORIENTIS; URANIUM; GROUNDWATER; GASOLENE; AQUIFER; NOV. AB Here we tested U(VI) reduction by a Desulfosporosinus species (sp.) isolate and type strain (DSM 765) in cell suspensions (pH 7) containing 1 mM U(VI) and lactate, under an atmosphere containing N-2-CO2-H-2 (90:5:5). Although neither Desulfosporosinus species (spp.) reduced U(VI) in cell suspensions with 0.25% Na-bicarbonate or 0.85% NaCl, U(VI) was reduced in these solutions by a control strain, Desulfovibrio desulfuricans (ATCC 642). However, both Desulfosporosinus strains reduced U(VI) in cell suspensions depleted in bicarbonate and NaCl. No U(VI) reduction was observed without lactate and H-2 electron donors or with heat-killed cells, indicating enzymatic U(VI) reduction. Uranium(VI) reduction by both strains was inhibited when 1 mM CuCl2 was added to the cell suspensions. Because the Desulfosporosinus DSM 765 does not contain cytochrome c(3) used by Desulfovibrio spp. to reduce U(VI), Desulfosporosinus species reduce uranium via a different enzymatic pathway. C1 Univ Wisconsin, Dept Geol & Geophys, Madison, WI 53706 USA. Argonne Natl Lab, Div Environm Res, Argonne, IL 60439 USA. Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA. Japan Marine Sci & Technol Ctr, Frontier Res Syst Extremophiles, Yokosuka, Kanagawa 237001, Japan. RP Suzuki, Y (reprint author), Univ Wisconsin, Dept Geol & Geophys, 1215 W Dayton St, Madison, WI 53706 USA. EM yohey@jamstec.go.jp RI ID, MRCAT/G-7586-2011; Suzuki, Yohey/G-4980-2014 NR 30 TC 47 Z9 47 U1 0 U2 3 PU WALTER DE GRUYTER GMBH PI BERLIN PA GENTHINER STRASSE 13, D-10785 BERLIN, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 2004 VL 92 IS 1 BP 11 EP 16 DI 10.1524/ract.92.1.11.25404 PG 6 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 777LV UT WOS:000189180600003 ER PT J AU Mincher, BJ Fox, RV Riddle, CL Cooper, DC Groenewold, GS AF Mincher, BJ Fox, RV Riddle, CL Cooper, DC Groenewold, GS TI Strontium and cesium sorption to snake river plain, Idaho soil SO RADIOCHIMICA ACTA LA English DT Article DE cesium; distribution coefficients; soil; sorption; strontium ID SEQUENTIAL EXTRACTION TECHNIQUE; DISTRIBUTION COEFFICIENTS; PLUTONIUM ASSOCIATION; AQUEOUS-SOLUTIONS; SOLID COMPONENTS; CALCAREOUS SOIL; CLAY-MINERALS; ROCKY FLATS; SANDY SOILS; RADIOCESIUM AB The behavior of strontium and cesium, on soil from the Radioactive Waste: Management Complex (RWMC) of the Idaho National Engineering, and Environmental Laboratory (INEEL), located on the Snake River Plain,of, southern Idaho, USA, was investigated using sequential aqueous extractions and batch sorption methods over six orders of magnitude in aqueous ion concentration. Sequential extractions revealed that most Sr is retained in the operationally-defined ion exchangeable and carbonate fractions, while Cs is predominantly found in the residual fraction. Strontium sorption was reversible, while Cs was not, except at the lowest concentrations. Freundlich isotherms can describe sorption of both metals at low aqueous concentrations, but Langmuir isotherms were needed to describe Cs and Sr sorption over the entire range used in this study. Slightly higher sorption was observed for both when experiments were repeated on soil that was treated to remove carbonates. C1 Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Mincher, BJ (reprint author), Idaho Natl Engn & Environm Lab, POB 1625, Idaho Falls, ID 83415 USA. EM hunt@inel.gov RI Mincher, Bruce/C-7758-2017; OI Riddle, Catherine/0000-0002-9667-7707 NR 54 TC 7 Z9 7 U1 0 U2 6 PU R OLDENBOURG VERLAG PI MUNICH PA LEKTORAT M/N, K BERBER-NERLINGER, POSTFACH 80 13 60, D-81613 MUNICH, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 2004 VL 92 IS 1 BP 55 EP 61 DI 10.1524/ract.92.1.55.25408 PG 7 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 777LV UT WOS:000189180600009 ER PT J AU Burns, PC Deely, KM Skanthakumar, S AF Burns, PC Deely, KM Skanthakumar, S TI Neptunium incorporation into uranyl compounds that form as alteration products of spent nuclear fuel: Implications for geologic repository performance SO RADIOCHIMICA ACTA LA English DT Article DE neptunium; nuclear waste; uranophane; compreignacite; meta-schoepite ID MOLECULAR-STRUCTURE; CRYSTAL-STRUCTURE; CORROSION; URANIUM; 90-DEGREES-C; RELEASE; PHASES; UO2; MECHANISMS; SCHOEPITE AB Alteration of spent nuclear fuel in a geological repository under oxidizing conditions is likely to result in abundant uranyl compounds. Incorporation of radionuclides into the uranyl alteration phases may significantly reduce their mobility, thereby impacting repository performance. The following compounds have been synthesized from solutions containing from similar to 10 to 500 ppm Np5+: meta-schoepite, UO(3)(.)2H(2)O; Nacompreignacite, Na-2[(UO2)(3)O-2(OH)(3)](2)(H2O)(7); uranophane, Ca(UO2)(2)(SiO3OH)(2)(H2O)(5); and beta-(UO2)(OH)(2). The structures of each involve sheets of uranyl polyhedra; the interlayers contain cations and H2O groups in Nacompreignacite and uranophane, only H2O in meta-schoepite, and beta-(UO2)(OH)(2) does not contain interlayer constituents. Synthesized powders were characterized by X-ray powder diffractometry, and were analyzed by ICP-AES (U, Na, Ca) and ICP-MS (Np). Aliquots of the powders were washed in 0.5 M acetic acid to remove sorbed Np prior to analysis. The powders of meta-schoepite and beta-(UO2)(OH)(2) contained at most a few ppm Np5+. in contrast, powders of Nacompreignacite and uranophane contained Np5+ in proportion to the Np5+ concentration in the mother solution, and powders of each containing more than 400 ppm Np5+ (of total Np + U) were obtained. Incorporation of Np5+ into uranyl compounds that form in a geological repository appears possible, and may impact the mobility of Np. C1 Univ Notre Dame, Dept Civil Engn & Geol Sci, Notre Dame, IN 46556 USA. Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA. RP Burns, PC (reprint author), Univ Notre Dame, Dept Civil Engn & Geol Sci, 156 Fitzpatrick Hall, Notre Dame, IN 46556 USA. EM pburns@nd.edu RI Burns, Peter/J-3359-2013; OI Burns, Peter/0000-0002-2319-9628 NR 41 TC 76 Z9 76 U1 3 U2 20 PU R OLDENBOURG VERLAG PI MUNICH PA LEKTORAT M/N, K BERBER-NERLINGER, POSTFACH 80 13 60, D-81613 MUNICH, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 2004 VL 92 IS 3 BP 151 EP 159 DI 10.1524/ract.92.3.151.30491 PG 9 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 823NI UT WOS:000221619300005 ER PT J AU Fassbender, M Nortier, FM Phillips, DR Hamilton, VT Heaton, RC Jamriska, DJ Kitten, JJ Pitt, LR Salazar, LL Valdez, FO Peterson, EJ AF Fassbender, M Nortier, FM Phillips, DR Hamilton, VT Heaton, RC Jamriska, DJ Kitten, JJ Pitt, LR Salazar, LL Valdez, FO Peterson, EJ TI Some nuclear chemical aspects of medical generator nuclide production at the Los Alamos hot cell facility SO RADIOCHIMICA ACTA LA English DT Article DE (68)Ge; (82) Sr; (109)Cd; (88)Zr; generator nuclide parent; charged particle induced reactions; radiochemical separation; reaction cross section; thick target yield ID POSITRON-EMISSION-TOMOGRAPHY; EXCITATION-FUNCTIONS; MYOCARDIAL-PERFUSION; RB-82 PET; ALPHA-PARTICLES; NATURAL KRYPTON; CROSS-SECTIONS; IN-VIVO; SR-82; Y-88 AB Generator nuclides constitute a convenient tool for applications in nuclear medicine. In this paper, some radiochemical aspects of generator nuclide parents regularly processed at Los Alamos are introduced. The bulk production of the parent nuclides (68)Ge, (82)Sr, (109)Cd and (88)Zr using charged particle beams is discussed. Production nuclear reactions for these radioisotopes. and chemical separation procedures are presented. Experimental processing yields correspond to 80%-98% of the theoretical thick target yield. Reaction cross sections are modeled using the code ALICE-IPPE; it is observed that the model largely disagrees with experimental values for the nuclear processes treated. Radionuclide production batches are prepared 1-6 times yearly for sales. Batch activities range from 40 MBq to 75 GBq. C1 Los Alamos Natl Lab, MSJ514, Radioisotope Prod & Proc Team, C 1NC, Los Alamos, NM 87545 USA. Los Alamos Natl Lab, CSIC, MSJ514, Los Alamos, NM 87545 USA. RP Fassbender, M (reprint author), Los Alamos Natl Lab, MSJ514, Radioisotope Prod & Proc Team, C 1NC, POB 1663, Los Alamos, NM 87545 USA. EM mifa@lanl.gov NR 61 TC 15 Z9 15 U1 2 U2 5 PU OLDENBOURG VERLAG PI MUNICH PA LEKTORAT MINT, POSTFACH 80 13 60, D-81613 MUNICH, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 2004 VL 92 IS 4-6 BP 237 EP 243 DI 10.1524/ract.92.4.237.35596 PG 7 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 838ZT UT WOS:000222753800011 ER PT J AU Hakem, N Apps, JA Moridis, GJ Al Mahamid, I AF Hakem, N Apps, JA Moridis, GJ Al Mahamid, I TI Sorption of fission product radionuclides, Cs-137 and Sr-90, by Savannah River Site sediments impregnated with colloidal silica SO RADIOCHIMICA ACTA LA English DT Article DE sorption; cesium; strontium; sediments; silica gel ID SOIL ORGANIC-MATTER; HUMIC-ACID; CHERNOBYL ACCIDENT; CLAY-MINERALS; FULVIC-ACID; ADSORPTION; CESIUM; RADIOCESIUM; KAOLINITE; BEHAVIOR AB Permeation grouting with colloidal silica gel is a potentially effective means for creating hydraulic barriers to prevent the advective migration of radioactive contaminants in shallow permeable sediments. However, the effectiveness of silica gel grouted barriers in controlling transport of fission product radionuclides through sorption and diffusion is unknown. To resolve this question, static-batch sorption measurements with Cs+ and Sr2+ were conducted at ambient temperature (23 degreesC) and for times up to 96 days on silica gel and on two kaolinitic sediments from the Savannah River Site in South Carolina. Sorption experiments on the latter were conducted both in the presence and in the absence of silica gel. Cesium and strontium concentrations were varied between 10(-3) to 10(-8) M (mol/L) and 10(-4) to 10(-8) M, respectively. The pH values after one day varied for each experiment and ranged from 3.6 to 6.6. The pH of the solutions were, however, buffered by the sediments and/or silica gel, and changed little over the duration of the experiments. The fraction of both cesium and strontium retained on the solids increased with decreasing radioelement concentration. The sorption data were fitted to the Freundlich isotherm model. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA. RP Apps, JA (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, 1 Cyclotron Rd, Berkeley, CA 94720 USA. EM jaapps@lbl.gov NR 51 TC 9 Z9 9 U1 2 U2 7 PU R OLDENBOURG VERLAG PI MUNICH PA LEKTORAT MINT, POSTFACH 80 13 60, D-81613 MUNICH, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 2004 VL 92 IS 7 BP 419 EP 432 DI 10.1524/ract.92.7.419.35754 PG 14 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 844AF UT WOS:000223128500006 ER PT J AU Francis, AJ Gillow, JB Dodge, CJ Harris, R Beveridge, TJ Papenguth, HW AF Francis, AJ Gillow, JB Dodge, CJ Harris, R Beveridge, TJ Papenguth, HW TI Uranium association with halophilic and non-halophilic bacteria and archaea SO RADIOCHIMICA ACTA LA English DT Article DE halophiles; uranium; phosphate; EXAFS; TEM; EDS ID MYCOBACTERIUM-SMEGMATIS; INORGANIC POLYPHOSPHATE; BACILLUS-SPHAERICUS; HEAVY-METALS; CELL-WALL; ADSORPTION; U(VI); EXAFS; BIOTRANSFORMATION; FERROOXIDANS AB We determined the association of uranium with bacteria isolated from the Waste Isolation Pilot Plant (WIPP), Carlsbad, New Mexico, and compared this with known strains of halophilic and non-halophilic bacteria and archaea. Examination of the cultures by transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDS) showed uranium accumulation extracellularly and/or intracellularly to a varying degree. In Pseudomonas,fluorescens and Bacillus subtilis uranium was associated with the cell surface and in the latter it was present as irregularly shaped grains. In Halobacterium halobium, the only archeon studied here, uranium was present as dense deposits and with Haloanaerobium praevalens as spikey deposits. Halomonas sp. isolated from the WIPP site accumulated uranium both extracellularly on the cell surface and intracellularly as electron-dense discrete granules. Extended X-ray absorption fine structure (EXAFS) analysis of uranium with the halophilic and non-halophilic bacteria and archaea showed that the uranium present in whole cells was bonded to an average of 2.4 +/- 0.7 phosphoryl groups at a distance of 3.65 +/- 0.03 Angstrom. Comparison of whole cells of Halomonas sp. with the cell wall fragments of lysed cells showed the presence of a uranium bidentate complex at 2.91 +/- 0.03 Angstrom with the carboxylate group on the cell wall, and uranyl hydroxide with U-U interaction at 3.71 +/- 0.03 Angstrom due to adsorption or precipitation reactions; no U-P interaction was observed. Addition of uranium to the cell lysate of Halomonas sp. resulted in the precipitation of uranium due to the inorganic phosphate produced by the cells. These results show that the phosphates released from bacteria bind a significant amount of uranium. However, the bacterially immobilized uranium was readily solubilized by bicarbonate with concurrent release of phosphate into solution. C1 Brookhaven Natl Lab, Upton, NY 11973 USA. Univ Guelph, Guelph, ON N1G 2W1, Canada. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Francis, AJ (reprint author), Brookhaven Natl Lab, Upton, NY 11973 USA. EM francis1@bnl.gov NR 34 TC 59 Z9 62 U1 3 U2 31 PU R OLDENBOURG VERLAG PI MUNICH PA LEKTORAT MINT, POSTFACH 80 13 60, D-81613 MUNICH, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 2004 VL 92 IS 8 BP 481 EP 488 DI 10.1524/ract.92.8.481.39281 PG 8 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 854OV UT WOS:000223914100006 ER PT J AU Tian, GX Kimura, T Yoshida, Z Zhu, YJ Rao, LF AF Tian, GX Kimura, T Yoshida, Z Zhu, YJ Rao, LF TI Fluorescence and IR studies on the hydration state of lanthanides(III) and curium(III) in the complexes extracted with purified Cyanex301, Cyanex302 and Cyanex272 SO RADIOCHIMICA ACTA LA English DT Article DE cyanex; Ln(III); Cm(III); hydration; fluorescence; IR ID LASER-INDUCED FLUORESCENCE; TRIVALENT LANTHANIDE; SEPARATION; ACID; SPECTROSCOPY; AM(III); LUMINESCENCE; CYANEX-301; EU(III); AMERICIUM(III) AB The hydration number of lanthanides, Ln(III) (Ln = Sm, Eu, Tb, Dy), and Cm(III) in the extracted complexes with purified Cyanex301, Cyanex302 and Cyanex272 was investigated using time-resolved laser-induced fluorescence spectroscopy (TRLFS) and FT-IR spectroscopy. The results, in conjunction with the previous results on the Ln(III) and Am(III) complexes, provide insight into the composition of the extracted complexes. No difference has been observed in the hydration number or the composition between the Ln(III) and Cm(III) complexes with Cyanex302 or Cyanex272. The extracted complexes of Ln(III) and Cm(III) with Cyanex302 have the formula, ML(HL2)(2)(.)nH(2)O, where L stands for the anion of Cyanex302 and n = 3-5. No water molecules are found in the first coordination shell of Ln(III) or Cm(III) complexes with Cyanex272. In contrast to the extraction with Cyanex302 or Cyanex272, the composition of the Ln(III) complexes is different from that of the Cm(III) complex in the extraction with Cyanex301. The Ln(III) complex with Cyanex301 has one or two H2O molecules with a molecular formula of LnL(3)(.)2H(2)O or HLnL(4)(.)H(2)O, where L stands for the anion of Cyanex301. However, the Cm(III) complex with Cyanex301 does not contain H2O with the molecular formula of HCmL4, in which only the 8 sulfur atoms from Cyanex301 coordinate to Cm(III). The results for Cm(III) agree with the previous data for Am(III) from EXAFS and IR measurements. C1 Lawrence Berkeley Natl Lab, Glenn T Seaborg Ctr, Berkeley, CA 94720 USA. Japan Atom Energy Res Inst, Dept Mat Sci, Tokai, Ibaraki 3191195, Japan. Tsing Hua Univ, Inst Nucl Energy Res, Beijing 100084, Peoples R China. RP Tian, GX (reprint author), Lawrence Berkeley Natl Lab, Glenn T Seaborg Ctr, 70A-1150,1 Cyclotron Rd, Berkeley, CA 94720 USA. EM Gtian@lbl.gov NR 29 TC 10 Z9 11 U1 0 U2 17 PU R OLDENBOURG VERLAG PI MUNICH PA LEKTORAT MINT, POSTFACH 80 13 60, D-81613 MUNICH, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 2004 VL 92 IS 8 BP 495 EP 499 DI 10.1524/ract.92.8.495.39274 PG 5 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 854OV UT WOS:000223914100008 ER PT J AU Rai, D Hess, NJ Yui, M Felmy, AR Moore, DA AF Rai, D Hess, NJ Yui, M Felmy, AR Moore, DA TI Thermodynamics and solubility of (UxNp1-x)O-2(am) solid solution in the carbonate system SO RADIOCHIMICA ACTA LA English DT Article; Proceedings Paper CT MIGRATION 2003 Conference CY SEP 21-26, 2003 CL Gyeongju, SOUTH KOREA DE solid solution; thermodynamics; solubility; actinides; uranium; neptunium; coprecipitation; U(IV) hydrous oxide; Np(IV) hydrous oxide; tetravalent actinides ID MODEL AB The formation of a solid solution can significantly affect the solubility of a minor component. The objectives of this study were to determine the nature of U(IV) and Np(IV) solid solutions and their thermodynamic properties. For this purpose, (UxNp1-x)O-2(am) precipitates with values of x varying from 0.05 to 0.95 were prepared, characterized, and used to determine their solubility in dilute to concentrated K2CO3 and KHCO3 solutions. The solubility data show that the equilibrium in these systems is reached in <7 days. the solubility-controlling solids are amorphous, and that we were successful in maintaining U and Np in the tetravalent state. A scanning electron microscope equipped with energy dispersive spectrometry and X-ray absorption spectroscopic analyses of the solids indicated the equilibrated co-precipitates to be solid Solutions. A close agreement between the thermodynamic predictions, assuming an ideal soli solution, and the experimental solubilities shows that U(TV) and Np(IV) form an ideal solid solution and that non-ideal solid solution behavior for this system can be ruled out. C1 Pacific NW Natl Lab, Richland, WA USA. Japan Nucl Cycle Dev Inst, Tokai Works, Tokai, Ibaraki, Japan. RP Rai, D (reprint author), Pacific NW Natl Lab, Richland, WA USA. EM dhan.rai@pnl.gov OI Hess, Nancy/0000-0002-8930-9500 NR 12 TC 5 Z9 5 U1 0 U2 7 PU R OLDENBOURG VERLAG PI MUNICH PA LEKTORAT MINT, POSTFACH 80 13 60, D-81613 MUNICH, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 2004 VL 92 IS 9-11 BP 527 EP 535 DI 10.1524/ract.92.9.527.54995 PG 9 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 880ZY UT WOS:000225831400003 ER PT J AU Rao, LF Garnov, AY Rai, D Xia, YX Moore, RC AF Rao, LF Garnov, AY Rai, D Xia, YX Moore, RC TI Protonation and complexation of isosaccharinic acid with U(VI) and Fe(III) in acidic solutions: potentiometric and calorimetric studies SO RADIOCHIMICA ACTA LA English DT Article; Proceedings Paper CT MIGRATION 2003 Conference CY SEP 21-26, 2003 CL Gyeongju, SOUTH KOREA DE isosaccharinic acid; protonation; complexation; U(VI); Fe(III) ID RADIOACTIVE-WASTE REPOSITORY; ORGANIC DEGRADATION PRODUCTS; ALKALINE CONDITIONS; CEMENTITIOUS REPOSITORY; CELLULOSIC MATERIALS; INTERMEDIATE; ELECTROPHORESIS; IDENTIFICATION; RADIONUCLIDES; TEMPERATURES AB Protonation and complexation of alpha-isosaccharinic acid with U(VI) and Fe(III) have been Studied in acidic solutions at t = 25 degreesC and I = 1.0 mol dm(-3) NaClO4. From the potentiometric titrations, the protonation constant of the carboxylate group is calculated to be 3.65 +/- 0.05 and the data are consistent with the presence of three and four successive mononuclear complexes for U(VI) and Fe(III), respectively. The formation constants of the complexes. log beta(j) for the reactions of M + L = MLj where j = 1-3 for U(VI), j = 1-4 for Fe(III) and L stands for isosaccharinate, are determined to be 2.91 +/- 0.15 (UO2L) 5.37 +/- 0.07 (UO2L2) 7.25 +/- 0.18 (UO2L3), 5.06 +/- 0.17 (FeL), 8.51 +/- 0.15 (FeL2), 11.00 +/- 0.16 (FeL3), and 12.99 +/- 0.17 (FeL4). From the calorimetric titrations, the enthalpy of protortation of the carboxylate group is determined to be -(7.94 +/- 0.03) kJ mol(-1), similar to that of other alpha-hydroxycarboxylates. The enthalpies of complexation between U(VI) and isosaccharinate are quite small: DeltaH(1) = -(1.0 +/- 1.0) kJ mol(-1), DeltaH(2) = 1.4 +/- 1.8 kJ mol(-1) and DeltaH(3) = -(6.2 +/- 3.0) kJ mol(-1), typical of the interactions between carboxylates and hard-acid cations. The complexation between U(VI) and isosaccharinate is mainly entropy-driven. In comparison, the enthalpies of complexation for FeL3 and FeL4 are large and exothermic, contributing significantly to the stability of the complexes. C1 Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. Pacific NW Natl Lab, Richland, WA 99352 USA. Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Rao, LF (reprint author), Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA. EM LRao@lbl.gov NR 31 TC 15 Z9 15 U1 2 U2 6 PU R OLDENBOURG VERLAG PI MUNICH PA LEKTORAT MINT, POSTFACH 80 13 60, D-81613 MUNICH, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 2004 VL 92 IS 9-11 BP 575 EP 581 DI 10.1524/ract.92.9.575.54970 PG 7 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 880ZY UT WOS:000225831400009 ER PT J AU Lee, MH Yoon, YY Clark, SB Glover, SE AF Lee, MH Yoon, YY Clark, SB Glover, SE TI Distribution and geochemical association of actinides in a contaminated soil as a function of grain size SO RADIOCHIMICA ACTA LA English DT Article; Proceedings Paper CT MIGRATION 2003 Conference CY SEP 21-26, 2003 CL Gyeongju, SOUTH KOREA DE distribution; geochemical association; actinide; particle size ID PARTICLE-SIZE; ROCKY FLATS; AM-241; CS-137; RADIONUCLIDES; SR-90; PU-239,PU-240; FALLOUT AB The distribution of actinides in a contaminated soil as a function of grain size was investigated by determining Pu-239.240, Am-241, and U-238 after size fractionation. The soil was contaminated as the result of a fire at a nuclear missile site in the US. In all cases, the activity of each isotope increased with decreasing particle size, although differences were observed for U-238. A simple spherical model was used to represent surface area as a function of grain size. Fitted values for the distributions of Pu-239.240 and Am-241 by this model correlated well with experimental values, suggesting that their association is a surface sorption phenomenon. Fitted values for U-238 did not correlate with measured values, indicating that U association was not strictly a surface mechanism. To further investigate the partitioning of these isotopes within each size fraction. sequential extractions were performed on the various size fractions. Pu-239.240, Am-241, and U-238 are associated with primarily reducible, acid sulfide soluble.. and refractory phases, with more total activity associated with the refractory phase for the smaller size fractions. Considering only the final refractory phase for each size fraction, the activity of U-238 was greater than Pu-239.240 and Am-241. In the context of the behavior of U as a function of grain size. this result suggests that a significant fraction of the U is primordial and incorporated into the refractory matrix, most likely the silicates and refractory clay minerals. C1 Washington State Univ, Dept Chem, Pullman, WA 99164 USA. Washington State Univ, Nucl Radiat Ctr, Pullman, WA 99164 USA. Los Alamos Natl Lab, Los Alamos, NM 87544 USA. RP Clark, SB (reprint author), Washington State Univ, Dept Chem, Pullman, WA 99164 USA. EM s_clark@wsu.edu NR 20 TC 10 Z9 10 U1 0 U2 6 PU R OLDENBOURG VERLAG PI MUNICH PA LEKTORAT MINT, POSTFACH 80 13 60, D-81613 MUNICH, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 2004 VL 92 IS 9-11 BP 671 EP 675 DI 10.1524/ract.92.9.671.55012 PG 5 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 880ZY UT WOS:000225831400022 ER PT J AU Jakobsson, AM Albinsson, Y Rundberg, RS AF Jakobsson, AM Albinsson, Y Rundberg, RS TI Measurements and modelling of Pm sorption onto TiO2 and goethite SO RADIOCHIMICA ACTA LA English DT Article; Proceedings Paper CT MIGRATION 2003 Conference CY SEP 21-26, 2003 CL Gyeongju, SOUTH KOREA DE Pm; sorption; TiO2; goethite; surface complexation modelling ID SURFACE COMPLEXATION; ACID-BASE; FLUORESCENCE SPECTROSCOPY; METAL (HYDR)OXIDES; SOLUTION INTERFACE; WATER INTERFACE; CATION SORPTION; IONIC-STRENGTH; ADSORPTION; ALUMINA AB The sorption of Pm (1 x 10(-9) M) onto TiO2 and goethite has been studied as a function of pH and Ionic strength (0.01, 0.1 M NaClO4) at ambient temperature under N-2 atmosphere. For both minerals studied there is no effect of the different ionic strengths and the sorption (log K-a vs. pH) increases with a slope of similar to2. At the same pH sorption is lower on the more positively (or less negatively) charged goethite (pH(pzc) = 8.4) than on the TiO2 (pH(pzc) = 6.2). A comparison to other trivalent cations sorbed on different substrates (made by extracting values from %-sorbed curves and calculating these to K-a) indicate a similar pH-dependence. The results have been fitted using a 1-pK basic Stern model with FITEQL [1]. An a priori restriction was that only one sorption reaction stoichiometry at a time was to be used to keep the number of parameters as small as possible. Outersphere and mono-, bi- and tri-dentate inner-sphere complexes were fitted. For each fit the value of the capacitance was varied to find the value that provided the best fit. Two different site densities were used: 1 site/nm(2) and 2.31 sites/nm(2). For the low site density the reaction which provides the best tit was: drop SOH0.5- + Pm+3 <----> drop SOHPm2.5+ for both minerals. At the high site density the same reaction fits for TiO2 while there are several reactions that are equivalent in the fit for goethite. C1 Chalmers Univ Technol, Dept Nucl Chem, SE-41296 Gothenburg, Sweden. Los Alamos Natl Lab, Los Alamos, NM 87545 USA. RP Jakobsson, AM (reprint author), Chalmers Univ Technol, Dept Nucl Chem, SE-41296 Gothenburg, Sweden. EM miaj@chem.chalmers.se NR 38 TC 8 Z9 8 U1 0 U2 1 PU R OLDENBOURG VERLAG PI MUNICH PA LEKTORAT MINT, POSTFACH 80 13 60, D-81613 MUNICH, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 2004 VL 92 IS 9-11 BP 683 EP 689 DI 10.1524/ract.92.9.683.54993 PG 7 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 880ZY UT WOS:000225831400024 ER PT J AU Moore, RC Sanchez, C Holt, K Zhang, PC Xu, HF Choppin, GR AF Moore, RC Sanchez, C Holt, K Zhang, PC Xu, HF Choppin, GR TI Formation of hydroxyapatite in soils using calcium citrate and sodium phosphate for control of strontium migration SO RADIOCHIMICA ACTA LA English DT Article; Proceedings Paper CT MIGRATION 2003 Conference CY SEP 21-26, 2003 CL Gyeongju, SOUTH KOREA DE hydroxyapatite; apatite; soils; radionuclide; barrier; strontium; immobilization; sorption ID CONTAMINATED SEDIMENTS; SYNTHETIC HYDROXYAPATITE; SORPTION; URANIUM; IMMOBILIZATION; REMEDIATION; APATITE; METALS; PH AB Sr-90 contamination is a major problem at several U.S. sites. At some sites, Sr-90 has migrated deep underground making site remediation difficult. In this paper, we describe a novel method for precipitation of hydroxyapatite, a strong sorbent for Sr-90, in soil. The method is based on mixing a solution of calcium citrate and sodium phosphate in soil. As the indigenous soil microorganisms mineralize the citrate, the calcium is released and forms hydroxyapatite. Soil, taken from the Albuquerque desert, was treated with a sodium phosphate Solution or a sodium phosphate/calcium citrate solution. TEM and EDS were used to identify hydroxyapatite with CO32- substitutions, with a formula of (Ca4.8Na0.2)[(PO4)(2.8)(CO3)(0.2)](OH), in the soil treated with the sodium phosphate/calcium citrate solution. Untreated and treated soils were used in batch sorption experiments for Sr uptake. Average Sr uptake was 19.5, 77.0 and 94.7% for the untreated soil, soil treated with sodium phosphate, and soil with apatite, respectively. In desorption experiments, the untreated soil, phosphate treated soil and apatite treated soil released an average of 34.2, 28.8 and 4.8% respectively. The results indicate the potential of forming apatite in Soil using soluble reagents for retardation of radionuclide migration. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. Univ Arizona, Dept Soil Water & Environm Sci, Yuma, AZ 85364 USA. Univ New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131 USA. Florida State Univ, Dept Chem, Gainesville, FL 32606 USA. RP Moore, RC (reprint author), Sandia Natl Labs, POB 5800,MS-0779, Albuquerque, NM 87185 USA. EM rcmoore@sandia.gov NR 28 TC 16 Z9 16 U1 1 U2 16 PU R OLDENBOURG VERLAG PI MUNICH PA LEKTORAT MINT, POSTFACH 80 13 60, D-81613 MUNICH, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 2004 VL 92 IS 9-11 BP 719 EP 723 DI 10.1524/ract.92.9.719.55000 PG 5 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 880ZY UT WOS:000225831400029 ER PT J AU Ozaki, T Gillow, JB Kimura, T Ohnuki, T Yoshida, Z Francis, AJ AF Ozaki, T Gillow, JB Kimura, T Ohnuki, T Yoshida, Z Francis, AJ TI Sorption behavior of europium(III) and curium(III) on the cell surfaces of microorganisms SO RADIOCHIMICA ACTA LA English DT Article; Proceedings Paper CT MIGRATION 2003 Conference CY SEP 21-26, 2003 CL Gyeongju, SOUTH KOREA DE microorganisms; europium(III); curium(III); sorption; coordination environment; time-resolved laser-induced fluorescence spectroscopy (TRLFS) ID INDUCED FLUORESCENCE SPECTROSCOPY; BACILLUS-SUBTILIS; METAL-IONS; CHLORELLA-VULGARIS; EU(III); URANIUM; BINDING; SITES; WALL; BIOTRANSFORMATION AB We investigated the association of europium(III) and curium(III) with the microorganisms Chlorella vulgaris, Bacillus subtilis. Pseudomonas fluorescens, Halomonas sp.. Halobacterium salinarum, and Halobacterium halobium. We determined the kinetics and distribution coefficients (K-d) for Eu(III) and Cm(III) sorption at pH 3-5 by batch experiments, and evaluated the number of water molecules in the inner-sphere (N-H2O) and the degree of strength of ligand field (R-E/M) for Eu(Ill) by time-resolved laser-induced fluorescence spectroscopy (TRLFS). Exudates from C. vulgaris, Halomonas sp., and H. halobium had an affinity for Eu(III) and Cm(III). The log K-d of Eu(III) and Cm(III) showed that their sorption was not fully due to the exchange with three protons on the functional groups on cell surfaces. The halophilic microorganisms (Halomonas sp., Halobacterium salinarum, H. halobium) showed almost no pH dependence in log K-d, indicating that an exchange with Na+ on the functional groups was involved in their sorption. The DeltaN(H2O) (= 9 - N-H2O) for Eu(III) on C. vulgaris was 1-3, while that for the other microorganisms was over 3. demonstrating that the coordination of Eu(III) with C. vulgaris was predominantly an outer-spherical process. The R-E/M for Eu(III) on halophilic microorganisms was 2.5-5, while that for non-halophilic ones was 1-2.5. This finding suggests that the coordination environment of Eu(III) on the halophilic microorganisms is more complicated than that on the other three non-halophilic ones. C1 Japan Atom Energy Res Inst, Adv Sci Res Ctr, Ibaraki 3191195, Japan. Brookhaven Natl Lab, Dept Environm Sci, Upton, NY 11973 USA. RP Ozaki, T (reprint author), Japan Atom Energy Res Inst, Adv Sci Res Ctr, Ibaraki 3191195, Japan. EM tozaki@popsvr.tokai.jaeri.go.jp NR 27 TC 15 Z9 15 U1 1 U2 11 PU R OLDENBOURG VERLAG PI MUNICH PA LEKTORAT MINT, POSTFACH 80 13 60, D-81613 MUNICH, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 2004 VL 92 IS 9-11 BP 741 EP 748 DI 10.1524/ract.92.9.741.55006 PG 8 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 880ZY UT WOS:000225831400032 ER PT J AU Yoshida, T Ozaki, T Ohnuki, T Francis, AJ AF Yoshida, T Ozaki, T Ohnuki, T Francis, AJ TI Interactions of trivalent and tetravalent heavy metal-siderophore complexes with Pseudomonas fluorescens SO RADIOCHIMICA ACTA LA English DT Article; Proceedings Paper CT MIGRATION 2003 Conference CY SEP 21-26, 2003 CL Gyeongju, SOUTH KOREA DE adsorption; desferrioxamine B; Pseudomonas fluorescens; europium; hafnium ID BINDING; ADSORPTION; STABILITY; CHELATORS; TRANSPORT; IONS AB We investigated the interactions of the Fe(III)-, Eu(III)-, and Hf(IV)-desferrioxamine B (DFO) complexes with the Gram-negative aerobic bacterium Pseudomonas fluorescens. Potentiometric titration of 1:1 Fe(III)-, Eu(III)-, and Hf(IV)-DFO complexes showed that Hf(IV) formed a strong complex with DFO whose stability was comparable to that of the Fe(III)-DFO complex, while Eu(III) formed a weaker one. DFO in a growth medium was not degraded by R fluorescens. Contact of P. fluorescens cells with the Fe(III)-, Eu(III)-, and Hf(IV)-DFO complexes at pH 4-9 revealed that there was negligible adsorption of Hf(IV) and Fe(III), whereas Eu(III) was dissociated from DFO and was readily adsorbed by the cells. These results suggest that Fe(III) and Hf(IV) form stable complexes with DFO and are not adsorbed by P fluorescens cells. Europium(III) forms a weaker complex with DFO than Fe(III) and Hf(IV) do and its DFO complex is readily dissociated in the presence of the cells. C1 Japan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan. Brookhaven Natl Lab, Dept Environm Sci, Upton, NY 11973 USA. RP Yoshida, T (reprint author), Japan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan. EM yoshida@sparclt.tokai.jaeri.go.jp NR 24 TC 12 Z9 12 U1 0 U2 7 PU R OLDENBOURG VERLAG PI MUNICH PA LEKTORAT MINT, POSTFACH 80 13 60, D-81613 MUNICH, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 2004 VL 92 IS 9-11 BP 749 EP 753 DI 10.1524/ract.92.9.749.55003 PG 5 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 880ZY UT WOS:000225831400033 ER PT J AU Yusov, AB Fedosseev, AM Delegard, CH AF Yusov, AB Fedosseev, AM Delegard, CH TI Hydrolysis of Np(IV) and Pu(IV) and their complexation by aqueous Si(OH)(4) SO RADIOCHIMICA ACTA LA English DT Article DE neptunium(IV); plutonium(IV); silicic acid; complexation; stability constants; hydrolysis; spectroscopy ID SILICIC-ACID; ORTHOSILICIC ACID; SOLUBILITY PRODUCT; COLLOID FORMATION; PLUTONIUM(IV); URANIUM(VI); URANYL(VI) AB The hydrolysis and interaction of Np(IV) and Pu(IV) with orffiosilicic acid, Si(OH)(4), were studied in 0.1-1.0M ionic strength aqueous solutions. Spectrophotometry was used to study these reactions at about 10(-4) M Np(IV) and Pu(IV) concentrations. The first hydrolysis constants, K-hydr, agree with the majority of earlier spectrophotometric and potentiometric data. The absorption spectra of NpOH3+ and PuOH3+ were obtained by spectral deconvolution. Reasons to explain the overestimation of K-hydr, obtained by other methods [by extraction of trace amounts of Np(IV) and Pu(IV) and by solubility] are discussed. Formation of the complexes NpOSi(OH)(3)(3+) and PuOSi(OH)(3)(3+) is demonstrated in the presence of 0.005-0.016 M Si(OH), in the p[H+] range 1.0-2.2 and 0.3-1.4, respectively. Measured values of equilibrium constants of the reaction M4+ +Si(OH)(4) <----> MOSi(OH)(3)(3+) +H+ at ionic strength I = 1.0 are Ig K-1 = 0.41 +/- 0.02 and 1.04 +/- 0.04, respectively, for Np(IV) and Pu(IV). The stability constants of the NpOSi(OH)(3)(3+) and PuOSi(OH)(3)(3+) complexes, recalculated to zero ionic strength, are 1g beta(1)(0) = 11.2 and 11.8, respectively. The correlation between K-hydr, and K-1, as observed for all earlier studied metal ions, also occurs for both Np(IV) and Pu(IV). C1 Russian Acad Sci, Inst Chem Phys, Moscow 119991, Russia. Pacific NW Natl Lab, Richland, WA 99352 USA. RP Yusov, AB (reprint author), Russian Acad Sci, Inst Chem Phys, 31 Leninsky Prospect, Moscow 119991, Russia. EM ioussov@ipc.rssi.ru NR 43 TC 19 Z9 19 U1 2 U2 13 PU R OLDENBOURG VERLAG PI MUNICH PA LEKTORAT MINT, POSTFACH 80 13 60, D-81613 MUNICH, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 2004 VL 92 IS 12 BP 869 EP 881 DI 10.1524/ract.92.12.869.55104 PG 13 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 886CD UT WOS:000226203400003 ER PT J AU Hunt, RD Collins, JL AF Hunt, RD Collins, JL TI Uranium kernel formation via internal gelation SO RADIOCHIMICA ACTA LA English DT Article DE uranium; internal gelation; sol-gel; nuclear fuel AB In the 1970s and 1980s, U.S. Department of Energy (DOE) conducted numerous studies on the fabrication of nuclear fuel particles using the internal gelation process. These amorphous kernels were prone to flaking or breaking when gases tried to escape from the kernels during calcination and sintering. These earlier kernels would not meet today's proposed specifications for reactor fuel. In the interim, the internal gelation process has been used to create hydrous metal oxide microspheres for the treatment of nuclear waste. With the renewed interest in advanced nuclear fuel by the DOE, the lessons learned from the nuclear waste studies were recently applied to the fabrication of uranium kernels, which will become tri-isotropic (TRISO) fuel particles. These process improvements included equipment modifications, small changes to the feed formulations, and a new temperature profile for the calcination and sintering. The modifications to the laboratory-scale equipment and its operation as well as small changes to the feed composition increased the product yield from 60% to 80%-99%. The new kernels were substantially less glassy, and no evidence of flaking was found. Finally, key process parameters were identified, and their effects on the uranium microspheres and kernels are discussed. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Hunt, RD (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. EM huntrd@ornl.gov NR 8 TC 21 Z9 21 U1 1 U2 6 PU R OLDENBOURG VERLAG PI MUNICH PA LEKTORAT MINT, POSTFACH 80 13 60, D-81613 MUNICH, GERMANY SN 0033-8230 J9 RADIOCHIM ACTA JI Radiochim. Acta PY 2004 VL 92 IS 12 BP 909 EP 915 DI 10.1524/ract.92.12.909.55110 PG 7 WC Chemistry, Inorganic & Nuclear; Nuclear Science & Technology SC Chemistry; Nuclear Science & Technology GA 886CD UT WOS:000226203400008 ER PT J AU Moxom, J Reilly, PTA Whitten, WB Ramsey, JM AF Moxom, J Reilly, PTA Whitten, WB Ramsey, JM TI Sample pressure effects in a micro ion trap mass spectrometer SO RAPID COMMUNICATIONS IN MASS SPECTROMETRY LA English DT Letter ID IONIZATION C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Whitten, WB (reprint author), Oak Ridge Natl Lab, POB 2008,MS 6142, Oak Ridge, TN 37831 USA. EM whittenwb@ornl.gov NR 6 TC 4 Z9 4 U1 0 U2 7 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0951-4198 J9 RAPID COMMUN MASS SP JI Rapid Commun. Mass Spectrom. PY 2004 VL 18 IS 6 BP 721 EP 723 DI 10.1002/rcm.1389 PG 3 WC Chemistry, Analytical; Spectroscopy SC Chemistry; Spectroscopy GA 806XQ UT WOS:000220467000018 PM 15052585 ER PT J AU Kornienko, O Reilly, PTA Whitten, WB Ramsey, JM AF Kornienko, O Reilly, PTA Whitten, WB Ramsey, JM TI Micro ion trap mass spectrometry (vol 13, pg 50, 1999) SO RAPID COMMUNICATIONS IN MASS SPECTROMETRY LA English DT Correction ID ELECTROSPRAY; FIELD C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Kornienko, O (reprint author), Oak Ridge Natl Lab, POB 2008,MS 6142, Oak Ridge, TN 37831 USA. NR 18 TC 2 Z9 2 U1 1 U2 8 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0951-4198 J9 RAPID COMMUN MASS SP JI Rapid Commun. Mass Spectrom. PY 2004 VL 18 IS 6 BP 742 EP 742 DI 10.1002/rcm.1387 PG 1 WC Chemistry, Analytical; Spectroscopy SC Chemistry; Spectroscopy GA 806XQ UT WOS:000220467000024 ER PT J AU Ford, MJ Van Berkel, GJ AF Ford, MJ Van Berkel, GJ TI An improved thin-layer chromatography/mass spectrometry coupling using a surface sampling probe electrospray ion trap system SO RAPID COMMUNICATIONS IN MASS SPECTROMETRY LA English DT Article ID LASER-DESORPTION IONIZATION; FLIGHT MASS-SPECTROMETRY; TLC-MALDI; TIME; ONLINE; MS AB A combined surface sampling probe/electrospray emitter coupled with an ion trap mass spectrometer was used for the direct read out of unmodified reversed-phase C-18 thin-layer chromatography (TLC) plates. The operation of the surface sampling electrospray ionization interface in positive and negative ionization modes was demonstrated through the direct analysis of TLC plates on which a commercial test mix comprised of four dye compounds viz., rhodamine B, fluorescein, naphthol blue black, and fast green FCF, and an extract of the caffeine-containing plant Ilex vomitoria, were spotted and developed. Acquisition of full-scan mass spectra and automated collection of MS/MS product ion spectra while scanning a development lane along the surface of a TLC plate demonstrated the advantages of using an ion trap in this combination. Details of the sampling system, benefits of analyzing a developed lane in both positive ion and negative ion modes, levels of detection while surface scanning, surface scan speed effects, and the utility of three-dimensional data display, are also discussed. Copyright (C) 2004 John Wiley Sons, Ltd. C1 Oak Ridge Natl Lab, Div Chem Sci, Organ & Biol Mass Spectrometry Grp, Oak Ridge, TN 37831 USA. RP Van Berkel, GJ (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Organ & Biol Mass Spectrometry Grp, Oak Ridge, TN 37831 USA. EM vanberkelgj@ornl.gov NR 24 TC 62 Z9 64 U1 1 U2 12 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0951-4198 J9 RAPID COMMUN MASS SP JI Rapid Commun. Mass Spectrom. PY 2004 VL 18 IS 12 BP 1303 EP 1309 DI 10.1002/rcm.1486 PG 7 WC Chemistry, Analytical; Spectroscopy SC Chemistry; Spectroscopy GA 829UZ UT WOS:000222077100008 PM 15174184 ER PT J AU Peterson, DS Luo, QZ Hilder, EF Svec, F Frechet, JMJ AF Peterson, DS Luo, QZ Hilder, EF Svec, F Frechet, JMJ TI Porous polymer monolith for surface-enhanced laser desorption/ionization time-of-flight mass spectrometry of small molecules SO RAPID COMMUNICATIONS IN MASS SPECTROMETRY LA English DT Article ID DESORPTION-IONIZATION; SEPARATION MEDIA; SILICON; MATRIX; MALDI; ACID; CHROMATOGRAPHY; EXPLOSIVES AB Porous poly(butyl methacrylate-co-ethylene dimethacrylate), poly(benzyl methacrylate-co-ethylene dimethacrylate), and poly(styrene-co-divinylbenzene) monoliths have been prepared on the top of standard sample plates used for matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry and the modified plates were used for laser desorption/ionization mass spectrometry (LDI-MS). The hydrophobic porous surface of these monoliths enables the transfer of sufficient energy to the analyte to induce desorption and ionization prior to TOFMS analysis. Both UV and thermally initiated polymerization using a mask or circular openings in a thin gasket have been used to define spot locations matching those of the MALDI plates. The desorption/ionization ability of the monolithic materials depends on the applied laser power, the solvent used for sample preparation, and the pore size of the monoliths. The monolithic matrices are very stable and can be used even after long storage times in a typical laboratory environment without observing any deterioration of their properties. The performance of the monolithic material is demonstrated with the mass analysis of several small molecules including drugs, explosives, and acid labile compounds. The macroporous spots also enable the archiving of samples. Copyright (C) 2004 John Wiley Sons, Ltd. C1 Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EO Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA. RP Svec, F (reprint author), Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA. EM svec@berkeley.edu; frechet@cchem.berkeley.edu RI Luo, Quanzhou/B-4908-2011; Hilder, Emily/A-1001-2009; OI Hilder, Emily/0000-0002-4444-7870; Peterson, Dominic/0000-0001-8244-565X; Frechet, Jean /0000-0001-6419-0163 FU NIGMS NIH HHS [GM-48364] NR 30 TC 41 Z9 42 U1 1 U2 12 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0951-4198 J9 RAPID COMMUN MASS SP JI Rapid Commun. Mass Spectrom. PY 2004 VL 18 IS 13 BP 1504 EP 1512 DI 10.1002/rcm.1515 PG 9 WC Chemistry, Analytical; Spectroscopy SC Chemistry; Spectroscopy GA 833XW UT WOS:000222376000014 PM 15216513 ER PT J AU Whitten, WB Reilly, PTA Ramsey, JM AF Whitten, WB Reilly, PTA Ramsey, JM TI High-pressure ion trap mass spectrometry SO RAPID COMMUNICATIONS IN MASS SPECTROMETRY LA English DT Article ID PARTICLES AB The effects of buffer gas pressure on ion trap stability, mass resolution/calibration, and choice of mass scanning are described. Pressure effects were treated phenomenologically by adding a drag term to the ion equations of motion. The resulting collisional damping enlarges the mass-dependent stability region but reduces the region in which mass-selective resonance ejection can be performed. The pressure effects can be reduced by increasing the frequency of the alternating quadrupole field. Copyright (C) 2004 John Wiley Sons, Ltd. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Whitten, WB (reprint author), Oak Ridge Natl Lab, POB 2008,MS 6142, Oak Ridge, TN 37831 USA. EM whittenwb@ornl.gov NR 17 TC 26 Z9 26 U1 0 U2 23 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0951-4198 J9 RAPID COMMUN MASS SP JI Rapid Commun. Mass Spectrom. PY 2004 VL 18 IS 15 BP 1749 EP 1752 DI 10.1002/rcm.1549 PG 4 WC Biochemical Research Methods; Chemistry, Analytical; Spectroscopy SC Biochemistry & Molecular Biology; Chemistry; Spectroscopy GA 843JX UT WOS:000223076000011 PM 15282774 ER PT J AU Ford, MJ Van Berkel, GJ AF Ford, MJ Van Berkel, GJ TI An improved thin-layer chromatography/mass spectrometry coupling using a surface sampling probe electrospray ion trap system (vol 18, pg 1303, 2004) SO RAPID COMMUNICATIONS IN MASS SPECTROMETRY LA English DT Correction C1 Oak Ridge Natl Lab, Div Chem Sci, Organ & Biol Mass Spectrometry Grp, Oak Ridge, TN 37831 USA. RP Ford, MJ (reprint author), Oak Ridge Natl Lab, Div Chem Sci, Organ & Biol Mass Spectrometry Grp, POB 2008, Oak Ridge, TN 37831 USA. NR 1 TC 0 Z9 0 U1 0 U2 2 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0951-4198 J9 RAPID COMMUN MASS SP JI Rapid Commun. Mass Spectrom. PY 2004 VL 18 IS 15 BP 1776 EP U4 DI 10.1002/rcm.1486 PG 3 WC Chemistry, Analytical; Spectroscopy SC Chemistry; Spectroscopy GA 843JX UT WOS:000223076000014 ER PT J AU Vilkov, AN Bogdanov, B Pasa-Tolic, L Prior, DC Anderson, GA Masselon, CD Moore, RJ Smith, RD AF Vilkov, AN Bogdanov, B Pasa-Tolic, L Prior, DC Anderson, GA Masselon, CD Moore, RJ Smith, RD TI Tailored noise waveform/collosion-induced dissociation of ions stored in a linear ion trap combined with liquid chromatography/Fournier transform ion cyclotron resonance mass spectrometry SO RAPID COMMUNICATIONS IN MASS SPECTROMETRY LA English DT Article ID INFRARED MULTIPHOTON DISSOCIATION; SPACE-CHARGE; ACTIVATED DISSOCIATION; HIGHER-RESOLUTION; EXCITATION; IDENTIFICATION; ACCUMULATION; FTICR; PEPTIDES; DATABASE AB A new collision-induced dissociation (CID) technique based on broadband tailored noise waveform (TNW) excitation of ions stored in a linear ion trap has been developed. In comparison with the conventional sustained off-resonance irradiation (SORI) CID method commonly used in Fourier transform ion cyclotron resonance mass spectrometry (FTICR-MS), this MS/MS technique increases throughput by eliminating the long pump-down delay associated with gas introduction into the high vacuum ICR cell region. In addition, the TNW-CID method speeds spectrum acquisition since it does not require Fourier transformation, calculation of resonant frequencies and generation of the excitation waveforms. We demonstrate TNW-CID coupled with on-line capillary reverse-phase liquid chromatography separations for the identification of peptides. The experimental results are compared with data obtained using conventional quadrupole ion trap MS/MS and SORI-CID MS/MS in an ICR cell. Copyright (C) 2004 John Wiley Sons, Ltd. C1 Pacific NW Natl Lab, Div Biol Sci, Richland, WA 99352 USA. Pacific NW Natl Lab, EMSL, Richland, WA 99352 USA. RP Smith, RD (reprint author), Pacific NW Natl Lab, EMSL, POB 999,MS K8-98, Richland, WA 99352 USA. EM rds@pnl.gov RI Masselon, Christophe/A-2340-2010; Smith, Richard/J-3664-2012 OI Smith, Richard/0000-0002-2381-2349 NR 36 TC 7 Z9 7 U1 1 U2 5 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0951-4198 J9 RAPID COMMUN MASS SP JI Rapid Commun. Mass Spectrom. PY 2004 VL 18 IS 22 BP 2682 EP 2690 DI 10.1002/rcm.1664 PG 9 WC Biochemical Research Methods; Chemistry, Analytical; Spectroscopy SC Biochemistry & Molecular Biology; Chemistry; Spectroscopy GA 875WU UT WOS:000225453700010 PM 15487023 ER PT J AU Anbalagan, V Chien, W Gresham, GL Groenewold, GS Van Stipdonk, MJ AF Anbalagan, V Chien, W Gresham, GL Groenewold, GS Van Stipdonk, MJ TI Production and collision-induced dissociation of gas-phase, water- and alcohol-coordinated uranyl complexes containing halide or perchlorate anions SO RAPID COMMUNICATIONS IN MASS SPECTROMETRY LA English DT Article ID QUADRUPOLE ION-TRAP; ACTINIDE ALKOXIDE CHEMISTRY; TANDEM MASS-SPECTROMETRY; FRAGILE IONS; ARYLOXIDE; OXIDATION; HYDRATION; SHIFTS; U(IV) AB Electrospray ionization was used to generate mono-positive gas-phase complexes of the general formula [UO(2)A(S)(n)](+) where A = OH, Cl, Br, I or ClO4, S = H2O, CH3OH or CH3CH2OH, and n = 1-3. The multiple-stage dissociation pathways of the complexes were then studied using ion-trap mass spectrometry. For H2O-coordinated cations, the dissociation reactions observed included the elimination of H2O ligands and the loss of HA (where A = Cl, Br or 1). Only for the Br and ClO4 versions did collision-induced dissociation (CID) of the hydrated species generate the bare, uranyl-anion complexes. CID of the chloride and iodide versions led instead to the production of uranyl hydroxide and hydrated UO2+. Replacement of H2O ligands by alcohol increased the tendency to eliminate HA, consistent with the higher intrinsic acidity of the alcohols compared to water and potentially stronger UO2-O interactions within the alkoxide complexes compared to the hydroxide version. Copyright (C) 2004 John Wiley Sons, Ltd. C1 Wichita State Univ, Dept Chem, Wichita, KS 67260 USA. Idaho Natl Engn & Environm Lab, Idaho Falls, ID 83415 USA. RP Van Stipdonk, MJ (reprint author), Wichita State Univ, Dept Chem, 1845 Fairmont, Wichita, KS 67260 USA. EM Mike.VanStipdonk@Wichita.edu NR 18 TC 13 Z9 13 U1 2 U2 5 PU JOHN WILEY & SONS LTD PI CHICHESTER PA THE ATRIUM, SOUTHERN GATE, CHICHESTER PO19 8SQ, W SUSSEX, ENGLAND SN 0951-4198 J9 RAPID COMMUN MASS SP JI Rapid Commun. Mass Spectrom. PY 2004 VL 18 IS 24 BP 3028 EP 3034 DI 10.1002/rcm.1726 PG 7 WC Chemistry, Analytical; Spectroscopy SC Chemistry; Spectroscopy GA 880AR UT WOS:000225761200009 PM 15536628 ER PT B AU Brocato, R Heller, E Wendt, J Blaich, J Wouters, G Gurule, E Omdahl, G Palmer, D AF Brocato, R Heller, E Wendt, J Blaich, J Wouters, G Gurule, E Omdahl, G Palmer, D BE Heiter, G TI UWB communication using SAW correlators SO RAWCON: 2004 IEEE RADIO AND WIRELESS CONFERENCE, PROCEEDINGS LA English DT Proceedings Paper CT IEEE Radio and Wireless Conference (RAWCON 2004) CY SEP 19-22, 2004 CL Atlanta, GA SP IEEE Microwave Theory & Technol Soc, IEEE Commun Soc AB A simple approach to ultra-wideband (UWB) communication has been demonstrated using surface acoustic wave (SA W) correlators to provide direct RF-to-baseband conversion. The SAW correlators used are bi-phase shift key (BPSK) coded devices that can directly generate or detect an RF signal. This continuous wave (CW) approach to UWB communication is markedly different from the prevailing pulse-based techniques and offers advantages of simplicity, lower component count, and lower cost. The resulting transmitter and receiver architectures eliminate mixers, IF amplifiers, IF filters, and most baseband signal processing. Transmitters and receivers were built operating at 915 MHz, 2.43 GHz, and 5.6 GHz using SAW correlators with 1.25%, 3.3%, 12.5%, 25%, and 50% fractional bandwidths. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Brocato, R (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. NR 8 TC 15 Z9 20 U1 0 U2 0 PU IEEE PI NEW YORK PA 345 E 47TH ST, NEW YORK, NY 10017 USA BN 0-7803-8451-2 PY 2004 BP 267 EP 270 DI 10.1109/RAWCON.2004.1389126 PG 4 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BBB80 UT WOS:000224588200068 ER PT B AU Nekoogar, F Dowla, F Spiridon, A AF Nekoogar, F Dowla, F Spiridon, A BE Heiter, G TI Self organization of wireless sensor networks using ultra-wideband radios SO RAWCON: 2004 IEEE RADIO AND WIRELESS CONFERENCE, PROCEEDINGS LA English DT Proceedings Paper CT IEEE Radio and Wireless Conference (RAWCON 2004) CY SEP 19-22, 2004 CL Atlanta, GA SP IEEE Microwave Theory & Technol Soc, IEEE Commun Soc DE channel estimation; interference mitigation; jitter; self-organization; synchronization; ultra-wideband.; wireless sensor networks AB Ultra-wideband (UWB) technology has proven to be useful in short range, high data rate, robust, and low power communications. These features can make UWB systems ideal candidates for reliable data communications between nodes of a wireless sensor network (WSN). However, the low powered UWB pulses can be significantly degraded by channel noise, inter-node interference, and intentional jamming. In this paper we present a novel interference suppression technique for UWB based WSNs that promises self-organization in terms of power conservation, scalability, and channel estimation for the entire distributed network. C1 Lawrence Livermore Natl Lab, Livermore, CA 94550 USA. RP Nekoogar, F (reprint author), Lawrence Livermore Natl Lab, POB 5508, Livermore, CA 94550 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 0-7803-8451-2 PY 2004 BP 451 EP 454 DI 10.1109/RAWCON.2004.1389174 PG 4 WC Engineering, Electrical & Electronic; Telecommunications SC Engineering; Telecommunications GA BBB80 UT WOS:000224588200114 ER PT S AU Geist, A AF Geist, A BE Kranzlmuller, D Kacsuk, P Dongarra, J TI PVM grids to self-assembling virtual machines SO RECENT ADVANCES IN PARALLEL VIRTUAL MACHINE AND MESSAGE PASSING INTERFACE, PROCEEDINGS SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT 11th European Parallel Virtural Machine and Message Passing Interface Users Group Meeting CY SEP 19-22, 2004 CL Budapest, HUNGARY SP IBM, Intel, NEC, EGEE Project, OM, Hungarian Minist Educ, MTA, Hungarian Acad Sci, IMFA, Fdn Technol Progress Ind AB Oak Ridge National Laboratory (ORNL) leads two of the five big Genomes-to-Life projects funded in the USA. As a part of these projects researchers at ORNL have been using PVM to build a computational biology grid that spans the USA. This talk will describe this effort, how it is built, and the unique features in PVM that led the researchers to choose PVM as their framework. The computations such as parallel BLAST axe run on individual supercomputers or clusters within this P2P grid and are themselves written in PVM to exploit PVM's fault tolerant capabilities. We will then describe our recent progress in building an even more adaptable distributed virtual machine package called Harness. The Harness project includes research on a scalable, self-adapting core called H2O, and research on fault tolerant MPI. Harness software framework provides parallel software "plug-ins" that adapt the run-time system to changing application needs in real time. This past year we have demonstrated Harness' ability to self-assemble into a virtual machine specifically tailored for particular applications. Finally we will describe DOE's plan to create a National Leadership Computing Facility, which will house a 100 TF Cray X2 system, and a Cray Red Storm at ORNL, and an IBM Blue Gene system at Argonne National Lab. We will describe the scientific missions of this facility and the new concept of "computational end stations" being pioneered by the Facility. C1 Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA. RP Geist, A (reprint author), Oak Ridge Natl Lab, POB 2008, Oak Ridge, TN 37831 USA. EM gst@ornl.gov NR 2 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-23163-3 J9 LECT NOTES COMPUT SC PY 2004 VL 3241 BP 1 EP 4 PG 4 WC Computer Science, Theory & Methods SC Computer Science GA BAX59 UT WOS:000224114000001 ER PT S AU Thakur, R Gropp, WD Toonen, B AF Thakur, R Gropp, WD Toonen, B BE Kranzlmuller, D Kacsuk, P Dongarra, J TI Minimizing synchronization overhead in the implementation of MPI one-sided communication SO RECENT ADVANCES IN PARALLEL VIRTUAL MACHINE AND MESSAGE PASSING INTERFACE, PROCEEDINGS SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT 11th European Parallel Virtural Machine and Message Passing Interface Users Group Meeting CY SEP 19-22, 2004 CL Budapest, HUNGARY SP IBM, Intel, NEC, EGEE Project, OM, Hungarian Minist Educ, MTA, Hungarian Acad Sci, IMFA, Fdn Technol Progress Ind AB The one-sided communication operations in MPI axe intended to provide the convenience of directly accessing remote memory and the potential for higher performance than regular point-to-point communication. Our performance measurements with three MPI implementations (IBM MPI, Sun MPI, and LAM) indicate, however, that one-sided communication can perform much worse than point-to-point communication if the associated synchronization calls are not implemented efficiently. In this paper, we describe our efforts to minimize the overhead of synchronization in our implementation of one-sided communication in MPICH-2. We describe our optimizations for all three synchronization mechanisms defined in MPI: fence, post-start-complete-wait, and lock-unlock. Our performance results demonstrate that, for short messages, MPICH-2 performs six times faster than LAM for fence synchronization and 50% faster for post-start-complete-wait synchronization, and it performs more than twice as fast as Sun MPI for all three synchronization methods. C1 Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. RP Thakur, R (reprint author), Argonne Natl Lab, Div Math & Comp Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. RI Dongarra, Jack/E-3987-2014; OI Gropp, William/0000-0003-2905-3029 NR 11 TC 7 Z9 7 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-23163-3 J9 LECT NOTES COMPUT SC PY 2004 VL 3241 BP 57 EP 67 PG 11 WC Computer Science, Theory & Methods SC Computer Science GA BAX59 UT WOS:000224114000009 ER PT S AU Jiang, WH Liu, JX Jin, HW Panda, DK Buntinas, D Thakur, R Gropp, WD AF Jiang, WH Liu, JX Jin, HW Panda, DK Buntinas, D Thakur, R Gropp, WD BE Kranzlmuller, D Kacsuk, P Dongarra, J TI Efficient implementation of MPI-2 passive one-sided communication on InfiniBand clusters SO RECENT ADVANCES IN PARALLEL VIRTUAL MACHINE AND MESSAGE PASSING INTERFACE, PROCEEDINGS SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT 11th European Parallel Virtural Machine and Message Passing Interface Users Group Meeting CY SEP 19-22, 2004 CL Budapest, HUNGARY SP IBM, Intel, NEC, EGEE Project, OM, Hungarian Minist Educ, MTA, Hungarian Acad Sci, IMFA, Fdn Technol Progress Ind AB In this paper we compare various design alternatives for synchronization in MPI-2 passive one-sided communication on InfiniBand clusters. We discuss several requirements for synchronization in passive one-sided communication. Based on these requirements, we present four design alternatives, which can be classified into two categories: thread-based and atomic operation-based. In thread-based designs, synchronization is achieved with the help of extra threads. In atomic operation-based designs, we exploit InfiniBand atomic operations such as Compare-and-Swap and Fetch-and-Add. Our performance evaluation results show that the atomic operation-based design can require less synchronization overhead, achieve better concurrency, and consume fewer computing resources compared with the thread based design. C1 Ohio State Univ, Dept Comp Sci & Engn, Columbus, OH 43210 USA. Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. RP Jiang, WH (reprint author), Ohio State Univ, Dept Comp Sci & Engn, Columbus, OH 43210 USA. EM jiangw@cse.ohio-state.edu; liuj@cse.ohio-state.edu; jinhy@cse.ohio-state.edu; panda@cse.ohio-state.edu; buntinas@mcs.anl.gov; thakur@mcs.anl.gov; gropp@mcs.anl.gov OI Gropp, William/0000-0003-2905-3029 NR 15 TC 6 Z9 6 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-23163-3 J9 LECT NOTES COMPUT SC PY 2004 VL 3241 BP 68 EP 76 PG 9 WC Computer Science, Theory & Methods SC Computer Science GA BAX59 UT WOS:000224114000010 ER PT S AU Gropp, WD Ross, R Miller, N AF Gropp, WD Ross, R Miller, N BE Kranzlmuller, D Kacsuk, P Dongarra, J TI Providing efficient I/O redundancy in MPI environments SO RECENT ADVANCES IN PARALLEL VIRTUAL MACHINE AND MESSAGE PASSING INTERFACE, PROCEEDINGS SE Lecture Notes in Computer Science LA English DT Article; Proceedings Paper CT 11th European Parallel Virtural Machine and Message Passing Interface Users Group Meeting CY SEP 19-22, 2004 CL Budapest, HUNGARY SP IBM, Intel, NEC, EGEE Project, OM, Hungarian Minist Educ, MTA, Hungarian Acad Sci, IMFA, Fdn Technol Progress Ind AB Highly parallel applications often use either highly parallel file systems or large numbers of independent disks. Either approach can provide the high data rates necessary for parallel applications. However, the failure of a single disk or server can render the data useless. Conventional techniques, such as those based on applying erasure correcting codes to each file write, are prohibitively expensive for massively parallel scientific applications because of the granularity of access at which the codes are applied. In this paper we demonstrate a scalable method for recovering from single disk failures that is optimized for typical scientific data sets. This approach exploits coarser-grained (but precise) semantics to reduce the overhead of constructing recovery data and makes use of parallel computation (proportional to the data size and independent of number of processors) to construct data. Experiments are presented showing the efficiency of this approach on a cluster with independent disks, and a technique is described for hiding the creation of redundant data within the MPI-IO implementation. C1 Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. RP Argonne Natl Lab, Div Math & Comp Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. EM gropp@mcs.anl.gov; rross@mcs.anl.gov; neillml@mcs.anl.gov OI Gropp, William/0000-0003-2905-3029 NR 10 TC 2 Z9 2 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-23163-3 J9 LECT NOTES COMPUT SC PY 2004 VL 3241 BP 77 EP 86 PG 10 WC Computer Science, Theory & Methods SC Computer Science GA BAX59 UT WOS:000224114000011 ER PT S AU Latham, R Ross, R Thakur, R AF Latham, R Ross, R Thakur, R BE Kranzlmuller, D Kacsuk, P Dongarra, J TI The impact of file systems on MPI-IO scalability SO RECENT ADVANCES IN PARALLEL VIRTUAL MACHINE AND MESSAGE PASSING INTERFACE, PROCEEDINGS SE Lecture Notes in Computer Science LA English DT Article; Proceedings Paper CT 11th European Parallel Virtural Machine and Message Passing Interface Users Group Meeting CY SEP 19-22, 2004 CL Budapest, HUNGARY SP IBM, Intel, NEC, EGEE Project, OM, Hungarian Minist Educ, MTA, Hungarian Acad Sci, IMFA, Fdn Technol Progress Ind AB As the number of nodes in cluster systems continues to grow, leveraging scalable algorithms in all aspects of such systems becomes key to maintaining performance. While scalable algorithms have been applied successfully in some areas of parallel I/O, many operations are still performed in an uncoordinated manner. In this work we consider, in three file system scenarios, the possibilities for applying scalable algorithms to the many operations that make up the MPI-IO interface. From this evaluation we extract a set of file system characteristics that aid in developing scalable MPI-IO implementations. C1 Argonne Natl Lab, Argonne, IL 60439 USA. RP Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA. EM robl@mcs.ani.gov; rross@mcs.anl.gov; thakur@mcs.anl.gov RI Dongarra, Jack/E-3987-2014; OI Latham, Rob/0000-0002-5285-6375 NR 11 TC 6 Z9 6 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-23163-3 J9 LECT NOTES COMPUT SC PY 2004 VL 3241 BP 87 EP 96 PG 10 WC Computer Science, Theory & Methods SC Computer Science GA BAX59 UT WOS:000224114000012 ER PT S AU Gabriel, E Fagg, GE Bosilca, G Angskun, T Dongarra, JJ Squyres, JM Sahay, V Kambadur, P Barrett, B Lumsdaine, A Castain, RH Daniel, DJ Graham, RL Woodall, TS AF Gabriel, E Fagg, GE Bosilca, G Angskun, T Dongarra, JJ Squyres, JM Sahay, V Kambadur, P Barrett, B Lumsdaine, A Castain, RH Daniel, DJ Graham, RL Woodall, TS BE Kranzlmuller, D Kacsuk, P Dongarra, J TI Open MPI: Goals, concept, and design of a next generation MPI implementation SO RECENT ADVANCES IN PARALLEL VIRTUAL MACHINE AND MESSAGE PASSING INTERFACE, PROCEEDINGS SE Lecture Notes in Computer Science LA English DT Article; Proceedings Paper CT 11th European Parallel Virtural Machine and Message Passing Interface Users Group Meeting CY SEP 19-22, 2004 CL Budapest, HUNGARY SP IBM, Intel, NEC, EGEE Project, OM, Hungarian Minist Educ, MTA, Hungarian Acad Sci, IMFA, Fdn Technol Progress Ind AB A large number of MPI implementations are currently available, each of which emphasize different aspects of high-performance computing or axe intended to solve a specific research problem. The result is a myriad of incompatible MPI implementations, all of which require separate installation, and the combination of which present significant logistical challenges for end users. Building upon prior research, and influenced by experience gained from the code bases of the LAM/MPI, LA-MPI, and FT-MPI projects, Open MPI is an all-new, production-quality MPI-2 implementation that is fundamentally centered around component concepts. Open MPI provides a unique combination of novel features previously unavailable in an open-source, production-quality implementation of MPI. Its component architecture provides both a stable platform for third-party research as well as enabling the run-time composition of independent software add-ons. This paper presents a high-level overview the goals, design, and implementation of Open MPI. C1 Univ Tennessee, Innovat Comp Lab, Knoxville, TN 37996 USA. Indiana Univ, Open Syst Lab, Bloomington, IN 47405 USA. Los Alamos Natl Lab, Adv Comp Lab, Los Alamos, NM 87545 USA. RP Univ Tennessee, Innovat Comp Lab, Knoxville, TN 37996 USA. EM egabriel@cs.utk.edu; fagg@cs.utk.edu; bosilca@cs.utk.edu; anskun@cs.utk.edu; dongarra@cs.utk.edu; jsquyres@osl.iu.edu; vsahay@osl.iu.edu; pkambadu@osl.iu.edu; brbarret@osl.iu.edu; lums@osl.iu.edu; rhc@lanl.gov; ddd@lanl.gov; rlgraham@lanl.gov; twoodall@lanl.gov RI Dongarra, Jack/E-3987-2014 NR 11 TC 168 Z9 168 U1 0 U2 10 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-23163-3 J9 LECT NOTES COMPUT SC PY 2004 VL 3241 BP 97 EP 104 PG 8 WC Computer Science, Theory & Methods SC Computer Science GA BAX59 UT WOS:000224114000013 ER PT S AU Woodall, TS Graham, RL Castain, RH Daniel, DJ Sukalski, MW Fagg, GE Gabriel, E Bosilca, G Angskun, T Dongarra, JJ Squyres, JM Sahay, V Kambadur, R Barrett, B Lumsdaine, A AF Woodall, TS Graham, RL Castain, RH Daniel, DJ Sukalski, MW Fagg, GE Gabriel, E Bosilca, G Angskun, T Dongarra, JJ Squyres, JM Sahay, V Kambadur, R Barrett, B Lumsdaine, A BE Kranzlmuller, D Kacsuk, P Dongarra, J TI Open MPI's TEG point-to-point communications methodology: Comparison to existing implementations SO RECENT ADVANCES IN PARALLEL VIRTUAL MACHINE AND MESSAGE PASSING INTERFACE, PROCEEDINGS SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT 11th European Parallel Virtural Machine and Message Passing Interface Users Group Meeting CY SEP 19-22, 2004 CL Budapest, HUNGARY SP IBM, Intel, NEC, EGEE Project, OM, Hungarian Minist Educ, MTA, Hungarian Acad Sci, IMFA, Fdn Technol Progress Ind AB TEG is a new methodology for point-to-point messaging developed as a part of the Open MPI project. Initial performance measurements are presented, showing comparable ping-pong latencies in a single NIC configuration, but with bandwidths up to 30% higher than that achieved by other leading MPI implementations. Homogeneous dual-NIC configurations further improved performance, but the heterogeneous case requires continued investigation. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Sandia Natl Labs, Livermore, CA 94550 USA. Univ Tennessee, Knoxville, TN 37996 USA. Indiana Univ, Bloomington, IN 47405 USA. RP Woodall, TS (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. EM twoodall@lanl.gov; rlgraham@lanl.gov; rhc@lanl.gov; ddd@lanl.gov; mwsukal@ca.sandia.gov; fagg@cs.utk.edu; egabriel@cs.utk.edu; bosilca@cs.utk.edu; anskun@cs.utk.edu; dongarra@cs.utk.edu; jsquyres@osl.iu.edu; vsahay@osl.iu.edu; pkambadu@osl.iu.edu; brbarret@osl.iu.edu; lums@osl.iu.edu NR 8 TC 3 Z9 3 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-23163-3 J9 LECT NOTES COMPUT SC PY 2004 VL 3241 BP 105 EP 111 PG 7 WC Computer Science, Theory & Methods SC Computer Science GA BAX59 UT WOS:000224114000014 ER PT S AU Brightwell, R AF Brightwell, R BE Kranzlmuller, D Kacsuk, P Dongarra, J TI A new MPI implementation for Cray SHMEM SO RECENT ADVANCES IN PARALLEL VIRTUAL MACHINE AND MESSAGE PASSING INTERFACE, PROCEEDINGS SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT 11th European Parallel Virtural Machine and Message Passing Interface Users Group Meeting CY SEP 19-22, 2004 CL Budapest, HUNGARY SP IBM, Intel, NEC, EGEE Project, OM, Hungarian Minist Educ, MTA, Hungarian Acad Sci, IMFA, Fdn Technol Progress Ind AB Previous implementations of MPICH using the Cray SHMEM interface existed for the Cray T3 series of machines, but these implementations were abandoned after the T3 series was discontinued. However, support for the Cray SHMEM programming interface has continued on other platforms, including commodity clusters built using the Quadrics QsNet network. In this paper, we describe a design for MPI that overcomes some of the limitations of the previous implementations. We compare the performance of the SHMEM MPI implementation with the native implementation for Quadrics QsNet. Results show that our implementation is faster for certain message sizes for some micro-benchmarks. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Brightwell, R (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA. EM rbbrigh@sandia.gov NR 10 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-23163-3 J9 LECT NOTES COMPUT SC PY 2004 VL 3241 BP 122 EP 130 PG 9 WC Computer Science, Theory & Methods SC Computer Science GA BAX59 UT WOS:000224114000016 ER PT S AU Desai, N Bradshaw, R Lusk, A Lusk, E AF Desai, N Bradshaw, R Lusk, A Lusk, E BE Kranzlmuller, D Kacsuk, P Dongarra, J TI MPI cluster system software SO RECENT ADVANCES IN PARALLEL VIRTUAL MACHINE AND MESSAGE PASSING INTERFACE, PROCEEDINGS SE Lecture Notes in Computer Science LA English DT Article; Proceedings Paper CT 11th European Parallel Virtural Machine and Message Passing Interface Users Group Meeting CY SEP 19-22, 2004 CL Budapest, HUNGARY SP IBM, Intel, NEC, EGEE Project, OM, Hungarian Minist Educ, MTA, Hungarian Acad Sci, IMFA, Fdn Technol Progress Ind AB We describe the use of MPI for writing system software and tools, an area where it has not been previously applied. By "system software" we mean collections of tools used for system management and operations. We describe the common methodologies used for system software development, together with our experiences in implementing three items of system software with MPI. We demonstrate that MPI can bring significant performance and other benefits to system software. C1 Argonne Natl Lab, Div Math & Comp Sci, Argonne, IL 60439 USA. RP Argonne Natl Lab, Div Math & Comp Sci, 9700 S Cass Ave, Argonne, IL 60439 USA. NR 9 TC 4 Z9 4 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-23163-3 J9 LECT NOTES COMPUT SC PY 2004 VL 3241 BP 277 EP 286 PG 10 WC Computer Science, Theory & Methods SC Computer Science GA BAX59 UT WOS:000224114000034 ER PT S AU Woodall, TS Graham, RL Castain, RH Daniel, DJ Sukalski, MW Fagg, GE Gabriel, E Bosilca, G Angskun, T Dongarra, JJ Squyres, JM Sahay, V Kambadur, P Barrett, B Lumsdaine, A AF Woodall, TS Graham, RL Castain, RH Daniel, DJ Sukalski, MW Fagg, GE Gabriel, E Bosilca, G Angskun, T Dongarra, JJ Squyres, JM Sahay, V Kambadur, P Barrett, B Lumsdaine, A BE Kranzlmuller, D Kacsuk, P Dongarra, J TI TEG: A high-performance, scalable, multi-network point-to-point communications methodology SO RECENT ADVANCES IN PARALLEL VIRTUAL MACHINE AND MESSAGE PASSING INTERFACE, PROCEEDINGS SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT 11th European Parallel Virtural Machine and Message Passing Interface Users Group Meeting CY SEP 19-22, 2004 CL Budapest, HUNGARY SP IBM, Intel, NEC, EGEE Project, OM, Hungarian Minist Educ, MTA, Hungarian Acad Sci, IMFA, Fdn Technol Progress Ind AB TEG is a new component-based methodology for point-to-point messaging. Developed as part of the Open MPI project, TEG provides a configurable fault-tolerant capability for high-performance messaging that utilizes multi-network interfaces where available. Initial performance comparisons with other MPI implementations show comparable ping-pong latencies, but with bandwidths up to 30% higher. C1 Los Alamos Natl Lab, Los Alamos, NM 87545 USA. Sandia Natl Labs, Livermore, CA 94550 USA. Univ Tennessee, Knoxville, TN 37996 USA. Indiana Univ, Bloomington, IN 47405 USA. RP Woodall, TS (reprint author), Los Alamos Natl Lab, Los Alamos, NM 87545 USA. NR 10 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 3-540-23163-3 J9 LECT NOTES COMPUT SC PY 2004 VL 3241 BP 303 EP 310 PG 8 WC Computer Science, Theory & Methods SC Computer Science GA BAX59 UT WOS:000224114000037 ER PT S AU Brightwell, R Underwood, KD Riesen, R AF Brightwell, R Underwood, KD Riesen, R BE Kranzlmuller, D Kacsuk, P Dongarra, J TI An initial analysis of the impact of overlap and independent progress for MPI SO RECENT ADVANCES IN PARALLEL VIRTUAL MACHINE AND MESSAGE PASSING INTERFACE, PROCEEDINGS SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT 11th European Parallel Virtural Machine and Message Passing Interface Users Group Meeting CY SEP 19-22, 2004 CL Budapest, HUNGARY SP IBM, Intel, NEC, EGEE Project, OM, Hungarian Minist Educ, MTA, Hungarian Acad Sci, IMFA, Fdn Technol Progress Ind ID HIGH-PERFORMANCE; NETWORK AB The ability to offload functionality to a programmable network interface is appealing, both for increasing message passing performance and for reducing the overhead on the host processor(s). Two important features of an MPI implementation are independent progress and the ability to overlap computation with communication. In this paper, we compare the performance of several application benchmarks using an MPI implementation that takes advantage of a programmable NIC to implement MPI semantics with an implementation that does not. Unlike previous such comparisons, we compare identical network hardware using virtually the same software stack. This comparison isolates these two important features of an MPI implementation. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Brightwell, R (reprint author), Sandia Natl Labs, POB 5800,MS-1110, Albuquerque, NM 87185 USA. EM rbbrigh@sandia.gov; kdunder@sandia.gov; rolf@sandia.gov NR 15 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 3-540-23163-3 J9 LECT NOTES COMPUT SC PY 2004 VL 3241 BP 370 EP 377 PG 8 WC Computer Science, Theory & Methods SC Computer Science GA BAX59 UT WOS:000224114000045 ER PT S AU Trinitis, C Schulz, M AF Trinitis, C Schulz, M BE Kranzlmuller, D Kacsuk, P Dongarra, J TI Special session of EuroPVM/MPI 2004 - Current trends in numerical simulation for parallel engineering environments - ParSim 2004 SO RECENT ADVANCES IN PARALLEL VIRTUAL MACHINE AND MESSAGE PASSING INTERFACE, PROCEEDINGS SE LECTURE NOTES IN COMPUTER SCIENCE LA English DT Article; Proceedings Paper CT 11th European Parallel Virtural Machine and Message Passing Interface Users Group Meeting CY SEP 19-22, 2004 CL Budapest, HUNGARY SP IBM, Intel, NEC, EGEE Project, OM, Hungarian Minist Educ, MTA, Hungarian Acad Sci, IMFA, Fdn Technol Progress Ind C1 Tech Univ Munich, LRR, Inst Informat, Munich, Germany. Lawrence Livermore Natl Lab, Ctr Appl Sci Comp, Livermore, CA USA. RP Trinitis, C (reprint author), Tech Univ Munich, LRR, Inst Informat, Munich, Germany. EM Carsten.Trinitis@in.tum.de; schulz5@llnl.gov NR 0 TC 0 Z9 0 U1 0 U2 0 PU SPRINGER-VERLAG BERLIN PI BERLIN PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY SN 0302-9743 BN 3-540-23163-3 J9 LECT NOTES COMPUT SC PY 2004 VL 3241 BP 415 EP 416 PG 2 WC Computer Science, Theory & Methods SC Computer Science GA BAX59 UT WOS:000224114000050 ER PT S AU Welk, ME Nenoff, TM Bonhomme, F AF Welk, ME Nenoff, TM Bonhomme, F BE VanSteen, E Claeys, M Callanan, LH TI Defect-free zeolite thin film membranes for H-2 purification and CO2 separation SO RECENT ADVANCES IN THE SCIENCE AND TECHNOLOGY OF ZEOLITES AND RELATED MATERIALS, PTS A - C SE STUDIES IN SURFACE SCIENCE AND CATALYSIS LA English DT Article; Proceedings Paper CT 14th International Zeolite Conference on Recent Advances in the Science and Technology of Zeolites and Related Materials CY APR 25-30, 2004 CL Catalys Soc S Africa, Cape Town, SOUTH AFRICA HO Catalys Soc S Africa ID ZSM-5 MEMBRANES; MFI MEMBRANES AB ZSM-5 and Silicalite (Al-free ZSM-5) membranes have been grown on porous alpha - alumina supports v hydrothermal synthesis for IT, purification and CO2 sequestration from methane reforming processes. The optimized synthesis parameters for both types of membranes, including gel composition and ageing, see composition and deposition techniques, temperature, time, and membrane calcination parameters a, discussed. The permeation characteristics of several membranes for gases present during methane reformin processes (H-2, CO2, O-2, CH4, N-2, and CO) were measured, as well as for the test gas He and SF6. The permeance of H-2 is higher than other gases through ZSM-5 films; CO, is higher than that of the other gases and is between two and three times higher than that of the smaller He atoms or H-2 Molecules through silicalite membranes. Mixed gases have unique permeation selectivities With Silicalite, the higher permeance of CO2 is likely due to enhanced surface diffusion. Membranes showed a decrease in CO, permeation over time, which was regenerated after a heating cycle. C1 Sandia Natl Labs, Albuquerque, NM 87185 USA. RP Nenoff, TM (reprint author), Sandia Natl Labs, POB 5800,MS 0734, Albuquerque, NM 87185 USA. EM tmnenof@sandia.gov NR 14 TC 9 Z9 9 U1 0 U2 3 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2991 BN 0-444-51805-3 J9 STUD SURF SCI CATAL PY 2004 VL 154 BP 690 EP 694 PN A-C PG 5 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA BBR47 UT WOS:000227357207089 ER PT S AU Martinez-Inesta, MM Peral, I Proffen, T Lobo, RF AF Martinez-Inesta, MM Peral, I Proffen, T Lobo, RF BE VanSteen, E Claeys, M Callanan, LH TI A pair distribution function analysis for zeolite beta SO RECENT ADVANCES IN THE SCIENCE AND TECHNOLOGY OF ZEOLITES AND RELATED MATERIALS, PTS A - C SE Studies in Surface Science and Catalysis LA English DT Article; Proceedings Paper CT 14th International Zeolite Conference CY APR 25-30, 2004 CL Cape Town, SOUTH AFRICA SP Catalysis Soc S Africa & India, Int Zeolite Assoc DE disorder; beta; pair distribution function ID X-RAY-DIFFRACTION; PROGRAM; CONNECTIVITY; REFINEMENT; TOPOLOGY AB The structure of disordered zeolites cannot be solved or refined by commonly used crystallographic methods. Here we used the pair distribution function (PDF) of a good quality sample to attempt to refine the structure of the polytypes of zeolite Beta. By using the PDF method to refine the structure of polytype B we were able to find a structural model that is consistent with the experimental distribution of distances in the sample and typical all silica zeolite dimensions. C1 Univ Delaware, Dept Chem Engn, Ctr Catalyt Sci & Technol, Newark, DE 19716 USA. Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA. NIST, Ctr Neutron Res, Gaithersburg, MD 20988 USA. Los Alamos Natl Lab, Lujan Neutron Scattering Ctr, Los Alamos Neutron Sci Ctr, Los Alamos, NM 87545 USA. RP Univ Delaware, Dept Chem Engn, Ctr Catalyt Sci & Technol, Newark, DE 19716 USA. EM lobo@che.udel.edu RI Lujan Center, LANL/G-4896-2012; Proffen, Thomas/B-3585-2009; Peral Alonso, Inmaculada/P-5298-2016 OI Proffen, Thomas/0000-0002-1408-6031; Peral Alonso, Inmaculada/0000-0002-6994-1277 NR 27 TC 0 Z9 0 U1 1 U2 1 PU ELSEVIER SCIENCE BV PI AMSTERDAM PA SARA BURGERHARTSTRAAT 25, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS SN 0167-2991 BN 0-444-51805-3 J9 STUD SURF SCI CATAL PY 2004 VL 154 BP 1393 EP 1399 PN A-C PG 7 WC Chemistry, Physical; Materials Science, Multidisciplinary SC Chemistry; Materials Science GA BBR47 UT WOS:000227357201033 ER PT S AU Holm, EA Miodownik, MA Healey, KJ AF Holm, EA Miodownik, MA Healey, KJ BE Bacroix, B Driver, JH LeGall, R Maurice, C Penelle, R Regle, H Tabourot, L TI A subgrain growth model for strain-free grain nucleation during recrystallization SO RECRYSTALLIZATION AND GRAIN GROWTH, PTS 1 AND 2 SE MATERIALS SCIENCE FORUM LA English DT Article; Proceedings Paper CT 2nd Joint International Conference on Recrystallization and Grain Growth CY AUG 30-SEP 03, 2004 CL Annecy, FRANCE SP Alcan, Voreppe Res Ctr, Niobium Prod Co GmbH, Arcelor, Rhone Alpes, ESIA DE subgrain growth; abnormal grain growth; recrystallization; computer simulation; nucleation and growth; aluminum ID CRYSTALS AB The origin of the strain-free crystallites that nucleate the recrystallization process has been debated for decades. Realistic, three-dimensional computer simulations indicate that the nucleation event is the mobility-driven abnormal growth of certain subgrains. Based on these observations, we derive a model that incorporates subgrain topology, texture, boundary distribution and boundary properties to predict the frequency of the abnormal growth events that lead to nucleation. The qualitative and quantitative agreement between theory, simulation, and experiments is excellent. C1 Sandia Natl Labs, Mat & Process Modeling Dept, Albuquerque, NM 87185 USA. Kings Coll London, Dept Mech Engn, London, England. RP Holm, EA (reprint author), Sandia Natl Labs, Mat & Process Modeling Dept, Albuquerque, NM 87185 USA. RI Holm, Elizabeth/S-2612-2016; OI Holm, Elizabeth/0000-0003-3064-5769; Healey, Kristopher/0000-0001-7505-2401 NR 12 TC 9 Z9 9 U1 0 U2 4 PU TRANS TECH PUBLICATIONS LTD PI ZURICH-UETIKON PA BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLAND SN 0255-5476 BN 0-87849-952-0 J9 MATER SCI FORUM PY 2004 VL 467-470 BP 611 EP 616 PN 1-2 PG 6 WC Crystallography; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Crystallography; Materials Science; Metallurgy & Metallurgical Engineering GA BBE29 UT WOS:000225119800097 ER PT S AU Holm, EA Healey, KJ Battaile, CC AF Holm, EA Healey, KJ Battaile, CC BE Bacroix, B Driver, JH LeGall, R Maurice, C Penelle, R Regle, H Tabourot, L TI Coupled computer simulations of recrystallization in deformed polycrystals SO RECRYSTALLIZATION AND GRAIN GROWTH, PTS 1 AND 2 SE MATERIALS SCIENCE FORUM LA English DT Article; Proceedings Paper CT 2nd Joint International Conference on Recrystallization and Grain Growth CY AUG 30-SEP 03, 2004 CL Annecy, FRANCE SP Alcan, Voreppe Res Ctr, Niobium Prod Co GmbH, arcelor, Rhone Alpes, ESIA DE recrystallization; computer simulation; nucleation and growth; transformation kinetics; grain size distribution; plasticity; micromechanics ID MICROSTRUCTURAL EVOLUTION; DEFORMATION; GROWTH; NUCLEATION; CRYSTALS; METALS; STRAIN AB Because both nucleation and growth are local phenomena, recrystallization depends on the spatial distribution of strains in a plastically deformed polycrystal. Using a polycrystal plasticity finite element model, we calculated these distributions for equiaxed polycrystals of copper with a random texture. We incorporated the results into a mesoscale recrystallization simulation with a nucleation model based on subgrain evolution. The coupled simulation results indicate that differences in local structure cause significant differences in recrystallization kinetics and grain size distribution. Furthermore, recrystallization in non-uniformly deformed polycrystals, even those with a random texture, is quantitatively and qualitatively different than predicted by continuum models that assume a uniform distribution of strains. This work highlights the need to examine all length scales relevant to the recrystallization process. C1 Sandia Natl Labs, Mat & Process Modeling Dept, Albuquerque, NM 87185 USA. RP Holm, EA (reprint author), Sandia Natl Labs, Mat & Process Modeling Dept, Albuquerque, NM 87185 USA. RI Holm, Elizabeth/S-2612-2016; OI Holm, Elizabeth/0000-0003-3064-5769; Healey, Kristopher/0000-0001-7505-2401 NR 14 TC 2 Z9 2 U1 0 U2 0 PU TRANS TECH PUBLICATIONS LTD PI ZURICH-UETIKON PA BRANDRAIN 6, CH-8707 ZURICH-UETIKON, SWITZERLAND SN 0255-5476 BN 0-87849-952-0 J9 MATER SCI FORUM PY 2004 VL 467-470 BP 641 EP 646 PN 1-2 PG 6 WC Crystallography; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering SC Crystallography; Materials Science; Metallurgy & Metallurgical Engineering GA BBE29 UT WOS:000225119800102 ER EF