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Linear response of partially ionized, dense plasmas†

Published online by Cambridge University Press:  09 March 2009

T. Błeński  and
B. Cichocki
T. Błeński
Affiliation:
Institute de Génie Atomique, Département de Physique, Ecole Polytechnique Fédérate de Lausanne, 1015 Lausanne, Switzerland
B. Cichocki
Affiliation:
Institute de Génie Atomique, Département de Physique, Ecole Polytechnique Fédérate de Lausanne, 1015 Lausanne, Switzerland
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Abstract

We propose a new formalism to electronic polarizability of dense, partially ionized plasmas. This formalism is based upon the density functional theory for the electronic equilibrium, the random phase approximation for the density response of electrons, and the cluster expansion in the averaging over ionic configurations. The first term in the final cluster expansion for the imaginary part of electron polarizability corresponds to the Lindhard dielectric function formula. The second term contains the electronic states of the average atom. The additional effects that result from this theory are: channel mixing (screening), “inverse Bremstrahlung” corrections, and free-bound electronic transitions. Our approach allows the plasma (collective) and atomic physics phenomena to be treated in the frame of one formalism. The theory can be applied for stopping power and opacity calculations.

Type
Research Article
Information
Laser and Particle Beams , Volume 10 , Issue 2 , June 1992 , pp. 299 - 309
Copyright
Copyright © Cambridge University Press 1992

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References

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