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Title: Conservative algorithms for non-Maxwellian plasma kinetics

Abstract

Here, we present a numerical model and a set of conservative algorithms for Non-Maxwellian plasma kinetics with inelastic collisions. These algorithms self-consistently solve for the time evolution of an isotropic electron energy distribution function interacting with an atomic state distribution function of an arbitrary number of levels through collisional excitation, deexcitation, as well as ionization and recombination. Electron-electron collisions, responsible for thermalization of the electron distribution, are also included in the model. The proposed algorithms guarantee mass/charge and energy conservation in a single step, and is applied to the case of non-uniform gridding of the energy axis in the phase space of the electron distribution function. Numerical test cases are shown to demonstrate the accuracy of the method and its conservation properties.

Authors:
 [1];  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Air Force Office of Scientific Research, Arlington, VA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1414363
Alternate Identifier(s):
OSTI ID: 1411992
Report Number(s):
LLNL-JRNL-735721
Journal ID: ISSN 1070-664X; TRN: US1800692
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 12; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION

Citation Formats

Le, Hai P., and Cambier, Jean -Luc. Conservative algorithms for non-Maxwellian plasma kinetics. United States: N. p., 2017. Web. doi:10.1063/1.4998242.
Le, Hai P., & Cambier, Jean -Luc. Conservative algorithms for non-Maxwellian plasma kinetics. United States. doi:10.1063/1.4998242.
Le, Hai P., and Cambier, Jean -Luc. Fri . "Conservative algorithms for non-Maxwellian plasma kinetics". United States. doi:10.1063/1.4998242. https://www.osti.gov/servlets/purl/1414363.
@article{osti_1414363,
title = {Conservative algorithms for non-Maxwellian plasma kinetics},
author = {Le, Hai P. and Cambier, Jean -Luc},
abstractNote = {Here, we present a numerical model and a set of conservative algorithms for Non-Maxwellian plasma kinetics with inelastic collisions. These algorithms self-consistently solve for the time evolution of an isotropic electron energy distribution function interacting with an atomic state distribution function of an arbitrary number of levels through collisional excitation, deexcitation, as well as ionization and recombination. Electron-electron collisions, responsible for thermalization of the electron distribution, are also included in the model. The proposed algorithms guarantee mass/charge and energy conservation in a single step, and is applied to the case of non-uniform gridding of the energy axis in the phase space of the electron distribution function. Numerical test cases are shown to demonstrate the accuracy of the method and its conservation properties.},
doi = {10.1063/1.4998242},
journal = {Physics of Plasmas},
number = 12,
volume = 24,
place = {United States},
year = {2017},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

Figure-1 Figure-1: Schematics of (a) excitation and (b) ionization processes. In the case of ionization, the energy exchanged W can take a range of values, while it is constrained to a single value (the excitation energy) in the first case.

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