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Thermal conductivity in a laser-created plasma heated by inverse bremsstrahlung absorption

Published online by Cambridge University Press:  13 March 2009

R. Balescu
R. Balescu
Affiliation:
Faculté des Sciences, CP 231, Association Euratom – Etat Belge, Université Libre de Bruxelles, Campus Plaine, 1050 Bruxelles, Belgium
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Abstract

The heat conductivity of a laser-created plasma heated by inverse bremsstrahlung absorption is investigated in the vicinity of a self-similar state (SSS), taken as reference state. Under certain conditions, the slowly varying macroscopic quantities obey true, local hydrodynamical equations and a well-defined, positive, heat conductivity exists. The latter is strongly time-dependent through the unperturbed temperature. Its value, compared to the classical heat conductivity at the same temperature, shows a reduction of about 20%. It is shown that, for high intensities and/or long wavelengths, the linear heat conduction theory necessarily breaks down, even if the temperature gradient is very small.

Type
Research Article
Information
Journal of Plasma Physics , Volume 28 , Issue 1 , August 1982 , pp. 65 - 92
Copyright
Copyright © Cambridge University Press 1982

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References

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