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Equations of state for ions in non-LTE plasmas

Published online by Cambridge University Press:  09 March 2009

S. Eliezer  and
E. Mínguez
S. Eliezer
Affiliation:
Institute of Nuclear Fusion, E.T.S. Ingenieros Industrials, c/José Gutiérrez Abascal 2, 28006 Madrid, Spain
E. Mínguez
Affiliation:
Institute of Nuclear Fusion, E.T.S. Ingenieros Industrials, c/José Gutiérrez Abascal 2, 28006 Madrid, Spain
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Abstract

For nonlocal thermodynamic equilibrium (LTE), the equations of state are not well defined and therefore the hydrodynamic equations are not applicable. In this case, the general transport equations (e.g., Boltzmann or Fokker–Planck) should be used. However, the coupling between atomic physics (rate equations) and the transport equations is extremely complicated. This article shows how the information given by the rate equations is translated into an effective potential. This “potential” theory is explicitly shown for two cases: lithium-like iron plasmas and aluminum plasmas. Moreover, it is suggested that the “collision terms,” and all other interactions that are not taken into account by the explicit rate equations, are described by a stochastic force given by a Langevin equation or equivalently by a Fokker-Planck equation in the ion density space.

Type
Research Article
Information
Laser and Particle Beams , Volume 10 , Issue 3 , September 1992 , pp. 495 - 504
Copyright
Copyright © Cambridge University Press 1992

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