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Title: Influence of atomic kinetics on inverse bremsstrahlung heating and nonlocal thermal transport

Abstract

This paper describes a computational model that self-consistently combines physics of kinetic electrons and atomic processes in a single framework. The formulation consists of a kinetic Vlasov-Boltzmann-Fokker-Planck equation for free electrons and a non-Maxwellian collisional-radiative model for atomic state populations. We utilize this model to examine the influence of atomic kinetics on inverse bremsstrahlung (IB) heating and nonlocal thermal transport. Here, we show that atomic kinetics affects nonlinear IB absorption rates by further modifying the electron distribution in addition to laser heating. We also show that accurate modeling of nonlocal heat flow requires a self-consistent treatment of atomic kinetics, because the effective thermal conductivity strongly depends on the ionization balance of the plasma.

Authors:
 [1];  [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1532619
Alternate Identifier(s):
OSTI ID: 1546375
Report Number(s):
LLNL-JRNL-773648
Journal ID: ISSN 2470-0045; PLEEE8; 965657
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review E
Additional Journal Information:
Journal Volume: 100; Journal Issue: 1; Journal ID: ISSN 2470-0045
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats

Le, Hai P., Sherlock, Mark, and Scott, Howard A. Influence of atomic kinetics on inverse bremsstrahlung heating and nonlocal thermal transport. United States: N. p., 2019. Web. doi:10.1103/PhysRevE.100.013202.
Le, Hai P., Sherlock, Mark, & Scott, Howard A. Influence of atomic kinetics on inverse bremsstrahlung heating and nonlocal thermal transport. United States. doi:10.1103/PhysRevE.100.013202.
Le, Hai P., Sherlock, Mark, and Scott, Howard A. Mon . "Influence of atomic kinetics on inverse bremsstrahlung heating and nonlocal thermal transport". United States. doi:10.1103/PhysRevE.100.013202. https://www.osti.gov/servlets/purl/1532619.
@article{osti_1532619,
title = {Influence of atomic kinetics on inverse bremsstrahlung heating and nonlocal thermal transport},
author = {Le, Hai P. and Sherlock, Mark and Scott, Howard A.},
abstractNote = {This paper describes a computational model that self-consistently combines physics of kinetic electrons and atomic processes in a single framework. The formulation consists of a kinetic Vlasov-Boltzmann-Fokker-Planck equation for free electrons and a non-Maxwellian collisional-radiative model for atomic state populations. We utilize this model to examine the influence of atomic kinetics on inverse bremsstrahlung (IB) heating and nonlocal thermal transport. Here, we show that atomic kinetics affects nonlinear IB absorption rates by further modifying the electron distribution in addition to laser heating. We also show that accurate modeling of nonlocal heat flow requires a self-consistent treatment of atomic kinetics, because the effective thermal conductivity strongly depends on the ionization balance of the plasma.},
doi = {10.1103/PhysRevE.100.013202},
journal = {Physical Review E},
number = 1,
volume = 100,
place = {United States},
year = {2019},
month = {7}
}

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