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Numerical study of self-interaction of Bernstein waves by nonlinear Landau damping

Published online by Cambridge University Press:  13 March 2009

Masao Sugawa
Masao Sugawa
Affiliation:
Department of Physics, Faculty of Science, Ehime University, Matsuyama 790, Japan
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Abstract

When Bernstein waves (B waves) are excited in a magnetized plasma, their self-interaction by nonlinear Landau damping (NLD) becomes the dominant mechanism for the electron heating of the bulk plasma. We examine this behaviour numerically. This occurs only for B waves with relatively small k∥ because the damping of the B waves becomes very small. This occurs in the relatively broad B-wave frequency range betweenω/ωc = 1.45 and 1.78. For B waves with large k∥ (k∥R > 0.15), virtual waves are not generated via self-interaction due to NLD because the quasi-linear cyclotron damping of the B waves becomes the dominant mechanism. The numerical results agree well with experimental ones.

Type
Research Article
Information
Journal of Plasma Physics , Volume 48 , Issue 3 , December 1992 , pp. 465 - 476
Copyright
Copyright © Cambridge University Press 1992

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