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Title: Review of the second charged-particle transport coefficient code comparison workshop

Journal Article · · Physics of Plasmas
DOI: https://doi.org/10.1063/5.0198155 · OSTI ID:2345983
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  1. Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
  2. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  3. University of Rochester, NY (United States)
  4. Michigan State University, East Lansing, MI (United States)
  5. San Jose State University, CA (United States)
  6. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  7. University of Michigan, Ann Arbor, MI (United States)
  8. Centre National de la Recherche Scientifique (CNRS) (France); Sorbonne University, Paris (France); Institut Polytechnique de Paris, Palaiseau (France)
  9. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); French Alternative Energies and Atomic Energy Commission, Arpajon (France); Université Paris-Saclay, Bruyeres-le-chatel (France)
  10. French Alternative Energies and Atomic Energy Commission, Arpajon (France)
  11. University of Rostock (Germany)
  12. Georgia Institute of Technology, Atlanta, GA (United States)
  13. Naval Research Lab. (NRL), Washington, DC (United States)
  14. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

We report the results of the second charged-particle transport coefficient code comparison workshop, which was held in Livermore, California on 24–27 July 2023. This workshop gathered theoretical, computational, and experimental scientists to assess the state of computational and experimental techniques for understanding charged-particle transport coefficients relevant to high-energy-density plasma science. Data for electronic and ionic transport coefficients, namely, the direct current electrical conductivity, electron thermal conductivity, ion shear viscosity, and ion thermal conductivity were computed and compared for multiple plasma conditions. Additional comparisons were carried out for electron–ion properties such as the electron–ion equilibration time and alpha particle stopping power. Overall, 39 participants submitted calculated results from 18 independent approaches, spanning methods from parameterized semi-empirical models to time-dependent density functional theory. In the cases studied here, we find significant differences—several orders of magnitude—between approaches, particularly at lower temperatures, and smaller differences—roughly a factor of five—among first-principles models. We investigate the origins of these differences through comparisons of underlying predictions of ionic and electronic structure. The results of this workshop help to identify plasma conditions where computationally inexpensive approaches are accurate, where computationally expensive models are required, and where experimental measurements will have high impact.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
AC52-07NA27344; NA0003525; 89233218CNA000001; NA0004146; NA0004144; NA0004128
OSTI ID:
2345983
Alternate ID(s):
OSTI ID: 2349192; OSTI ID: 2356806; OSTI ID: 2433947; OSTI ID: 2567729
Report Number(s):
LLNL--JRNL-859348; 1090012
Journal Information:
Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 31; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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