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Title: Modeling of inelastic collisions in a multifluid plasma: Excitation and deexcitation

We describe here a model for inelastic collisions for electronic excitation and deexcitation processes in a general, multifluid plasma. The model is derived from kinetic theory, and applicable to any mixture and mass ratio. The principle of detailed balance is strictly enforced, and the model is consistent with all asymptotic limits. The results are verified with direct Monte Carlo calculations, and various numerical tests are conducted for the case of an electron-hydrogen two-fluid system, using a generic, semi-classical model of collision cross sections. We find that in some cases, the contribution of inelastic collisions to the momentum and thermal resistance coefficients is not negligible, in contrast to the assumptions of current multifluid models. This fundamental model is also applied to ionization and recombination processes, the studies on which are currently underway.
Authors:
 [1] ;  [2]
  1. Department of Mathematics, University of California, Los Angeles, California 90095 (United States)
  2. Air Force Research Laboratory, Edwards AFB, California 93524 (United States)
Publication Date:
OSTI Identifier:
22493785
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ASYMPTOTIC SOLUTIONS; COLLISIONS; COMPUTERIZED SIMULATION; CROSS SECTIONS; CURRENTS; DE-EXCITATION; ELECTRONS; EXCITATION; HYDROGEN; MONTE CARLO METHOD; PLASMA; RECOMBINATION