Collisional‐radiative coefficients from a three‐level atomic model in nonequilibrium argon plasmas
作者:
C. G. Braun,
J. A. Kunc,
期刊:
Physics of Fluids(00319171)
(AIP Available online 1987)
卷期:
Volume 30,
issue 2
页码: 499-509
ISSN:0031-9171
年代: 1987
DOI:10.1063/1.866400
出版商: AIP
数据来源: AIP
摘要:
A three‐level atomic model is used for determining the steady‐state collisional‐radiative coefficients in nonequilibrium partially ionized argon plasmas. Rate equations for populations of the atomic levels are coupled to an electron Boltzmann equation that includes inelastic processes. The solution of these coupled equations yields an analytical form for the non‐Maxwellian electron distribution function. The reabsorption of radiation in the plasma is included through the use of Holstein radiation escape factors [Phys. Rev.83, 1159 (1951)]. The cross sections in this model are included in the form of simple analytical expressions obtained from a numerical fitting of available experimental data. The results and limitations of the approach are discussed in a broad range of plasma conditions (electron temperature below 25 000 °K and atomic density of 1014–1018cm−3).
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