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Electrostatic whistler mode conversion at plasma resonance

Published online by Cambridge University Press:  13 March 2009

J. E. Maggs  and
G. J. Morales
J. E. Maggs
Affiliation:
Physics Department, University of California at Los Angeles, Los Angeles, California 90024, U.S.A.
G. J. Morales
Affiliation:
Physics Department, University of California at Los Angeles, Los Angeles, California 90024, U.S.A.
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Abstract

The mode conversion of an electrostatic whistler wave into a Bohm–Gross mode at plasma resonance is analysed for a magnetized plasma with a longitudinal density gradient (i.e. ∇n0 X B = 0). It is found that a whistler incident upon plasma resonance from inside the plasma converts, without producing a reflected wave, into a short-wavelength Bohm-Gross mode that carries energy down the density gradient away from resonance. The detailed structure of the electric field near the resonance is found analytically. It is shown that the production of the Bohm-Gross wave by mode conversion can be described by a model of plasma resonance driven by a k = 0 electric field (i.e. the capacitor plate model). The relation between the driver amplitude and the amplitude of the incident whistler is derived.

Type
Research Article
Information
Journal of Plasma Physics , Volume 41 , Issue 2 , April 1989 , pp. 301 - 322
Copyright
Copyright © Cambridge University Press 1989

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References

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