Equations of state for electrons in non-LTE plasmas

In Local Thermodynamic Equilibrium (LTE) regimes, the Equations of State (EOS) for ions and electrons are well defined. However in situations far from equilibrium the temperature is not defined, and the hydrodynamic approach is not justified. Transport equations coupled to atomic rate equations is t...

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Bibliographic Details
Published in:Journal of quantitative spectroscopy & radiative transfer 1994, Vol.51 (1), p.229-235
Main Authors: Minguez, E., Eliezer, S., Falquina, R.
Format: Article
Language:English
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Summary:In Local Thermodynamic Equilibrium (LTE) regimes, the Equations of State (EOS) for ions and electrons are well defined. However in situations far from equilibrium the temperature is not defined, and the hydrodynamic approach is not justified. Transport equations coupled to atomic rate equations is the standard approach, although for high Z materials this approach may be prohibitive for existing computers. In this paper we propose a model which defines a potential function describing the dynamic of the electron density. A Langevin equation or Fokker-Planck one described in the density space connects the atomic rate equations with the transport one, in a more simple space. A random noise which takes into account uncertainties in the rates is also assumed.
ISSN:0022-4073
1879-1352
DOI:10.1016/0022-4073(94)90084-1