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Free expansion of a plasma with two electron temperatures

Published online by Cambridge University Press:  13 March 2009

L. M. Wickens  and
J. E. Allen
L. M. Wickens
Affiliation:
Department of Engineering Science, Oxford, U.K. and University College, Oxford University, Oxford, U. K.
J. E. Allen
Affiliation:
Department of Engineering Science, Oxford, U.K. and University College, Oxford University, Oxford, U. K.
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Abstract

A theory for the free expansion of a plasma with two electron temperatures is presented. It is shown that in the case of a laser-produced plasma expansion the ions separate into a fast and a slow component, and that the number of fast ions is particularly sensitive to the hot to cold electron temperature ratio. If the electron temperature ratio is ≳ 10 then the quasi-neutral self-similar solution breaks down. The regions in the rarefaction expansion where the quasi-neutrality assumption fails are discussed.

Type
Research Article
Information
Journal of Plasma Physics , Volume 22 , Issue 1 , August 1979 , pp. 167 - 185
Copyright
Copyright © Cambridge University Press 1979

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References

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