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Commissioning SFR gun for the ERL at BNL

Description: N/A
Date: May 12, 2013
Creator: Xu, W.; Altinbas, Z.; Belomestnykh, S.; Ben-Zvi, Ilan; Dai, J.; Deonaire, S. et al.
Partner: UNT Libraries Government Documents Department
open access

Mechanical Properties of Nuclear Fuel Surrogates using Picosecond Laser Ultrasonics

Description: Detailed understanding between microstructure evolution and mechanical properties is important for designing new high burnup nuclear fuels. In this presentation we discuss the use of picosecond ultrasonics to measure localize changes in mechanical properties of fuel surrogates. We develop measurement techniques that can be applied to investigate heterogeneous elastic properties caused by localize changes in chemistry, grain microstructure caused by recrystallization, and mechanical properties o… more
Date: May 1, 2013
Creator: Hurley, David; Khafizov, Marat; Farzbod, Farhad & Burgett, Eric
Partner: UNT Libraries Government Documents Department
open access

Results from Tight and Loose Coupled Multiphysics in Nuclear Fuels Performance Simulations using BISON

Description: The behavior of nuclear fuel in the reactor environment is affected by multiple physics, most notably heat conduction and solid mechanics, which can have a strong influence on each other. To provide credible solutions, a fuel performance simulation code must have the ability to obtain solutions for each of the physics, including coupling between them. Solution strategies for solving systems of coupled equations can be categorized as loosely-coupled, where the individual physics are solved separ… more
Date: May 1, 2013
Creator: Novascone, S. R.; Spencer, B. W.; Andrs, D.; Williamson, R. L.; Hales, J. D. & Perez, D. M.
Partner: UNT Libraries Government Documents Department
open access

A New Approach to Improving the Efficiency of FEL Oscillator Simulations

Description: During the last year we have been benchmarking FEL oscillator simulation codes against the measured performance of the three Jefferson Lab oscillator FELs. While one might think that a full 4D simulation is de facto the best predictor of performance, the simulations are computationally intensive, even when analytical approximations to the electron bunch longitudinal distribution are used. In this presentation we compare the predictions of the 4D FEL interaction codes Genesis and Medusa, in comb… more
Date: May 1, 2013
Creator: Shinn, Michelle D.; Benson, Stephen V.; Watson, Anne M.; Freund, Henry P.; Nyugen, Dinh C. & van der Slot, Peter J.M.
Partner: UNT Libraries Government Documents Department
open access

Application of the Principle of Maximum Conformality to Top-Pair Production

Description: A major contribution to the uncertainty of finite-order perturbative QCD predictions is the perceived ambiguity in setting the renormalization scale {mu}{sub r}. For example, by using the conventional way of setting {mu}{sub r} {element_of} [m{sub t}/2, 2m{sub t}], one obtains the total t{bar t} production cross-section {sigma}{sub t{bar t}} with the uncertainty {Delta}{sigma}{sub t{bar t}}/{sigma}{sub t{bar t}} {approx} (+3%/-4%) at the Tevatron and LHC even for the present NNLO level. The Pri… more
Date: May 13, 2013
Creator: Brodsky, Stanley J.; Wu, Xing-Gang & Dept of Physics, Chongqing University, China
Partner: UNT Libraries Government Documents Department
open access

Simultaneous extraction of transversity and Collins functions from new semi-inclusive deep inelastic scattering and e{sup +}e{sup -} data

Description: We present a global re-analysis of the most recent experimental data on azimuthal asymmetries in semi-inclusive deep inelastic scattering, from the HERMES and COMPASS Collaborations, and in e{sup +}e{sup -} {yields} h{sub 1} h{sub 2} X processes, from the Belle Collaboration. The transversity and the Collins functions are extracted simultaneously, in the framework of a revised global analysis in which a new parameterisation of the unknown functions is also tested.
Date: May 1, 2013
Creator: U., Turin; U., Turin; Cagliari, INFN; Cagliari U., INFN Cagliari; Cagliari, INFN & JLAB
Partner: UNT Libraries Government Documents Department
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