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Parametric decay of a whistler wave at the difference frequency of two electromagnetic waves in a plasma

Published online by Cambridge University Press:  13 March 2009

S. Guha  and
Ruby Sarkar
S. Guha
Affiliation:
Department of Physics, Ravishankar University, Raipur-492 010 (M.P.), India
Ruby Sarkar
Affiliation:
Department of Physics, Ravishankar University, Raipur-492 010 (M.P.), India
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Abstract

A large-amplitude whistler wave excited at the difference frequency of two high-frequency electromagnetic pump waves is shown to decay parametrically into a lower-hybrid wave (LHW) and a low-frequency ion–Bernstein wave (IBW) in a collisionless magnetized multi-ion-species plasma,. A nonlinear dispersion relation describing this parametric interaction process is derived. The low-frequency ponderomotive force along the direction of the external magnetic field leads to the dominant coupling. Possible applications to ion heating in the ionosphere, in the earth's magnetosphere and in laboratory plasmas are discussed.

Type
Research Article
Information
Journal of Plasma Physics , Volume 45 , Issue 1 , February 1991 , pp. 115 - 123
Copyright
Copyright © Cambridge University Press 1991

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