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Parametric instabilities with well separated frequencies in magnetized plasmas

Published online by Cambridge University Press:  13 March 2009

Yu-Mei Chou
Affiliation:
Institute of Physics, Academic Sinica, Beijing, People's Republic of China
Shih-Tung Tsai
Affiliation:
International Center for Theoretical Physics, Trieste, Italy

Abstract

A nonlinear dispersion relation is derived for a homogeneous, magnetized plasma by the conventional ‘ponderomotive force’ method. By using this dispersion relation, various parametric instabilities (stimulated anomalous absorptions and scatterings) are discussed. The results are compared in detail with those obtained by other authors. In the validity region of this model the results derived by previous authors can be recovered. In addition to obtaining a few instabilities which have not been published in the literature, we also find that in general (i) the ‘dipole approximation’ can give the right results for the stimulated anomalous absorption problems and (ii) the ambient magnetic field may enhance the plasma stability.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1981

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