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Nonlinear variations of the reflexion coefficient for lower-hybrid heating

Published online by Cambridge University Press:  13 March 2009

V. A. Petržílka
Affiliation:
Institute of Plasma Physics, Czechoslovak Academy of Sciences, 182 11 Praha, Czechoslovakia
R. Klíma
Affiliation:
Institute of Plasma Physics, Czechoslovak Academy of Sciences, 182 11 Praha, Czechoslovakia
P. Pavlo
Affiliation:
Institute of Plasma Physics, Czechoslovak Academy of Sciences, 182 11 Praha, Czechoslovakia

Abstract

The effect of the ponderomotive depression of the plasma density on the power reflexion coefficient is calculated in the first space harmonic approximation. Numerical results demonstrate a considerable growth of the reflexion coefficient when increasing the RF power. Exceptionally, the reflexion coefficient can be almost invariable up to high RF power densities (≃ 10kW cm-2), if the unperturbed plasma density gradient is high (≳ 5 × 1012 cm-4). The relation of the present theory to experiments is discussed.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1983

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References

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