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Parametric excitation in an inhomogeneous plasma

Published online by Cambridge University Press:  13 March 2009

C. S. Chen
C. S. Chen
Affiliation:
Department of Applied Physics and Information Science, University of California at San Diego, La Jolla, California 92037, U.S.A.
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Abstract

An infinite, inhomogeneous electron plasma driven by a spatially uniform oscillating electric field is investigated. The multi-time perturbation method is used to analyze possible parametric excitations of transverse waves and to evaluate their growth rates. It is shown that there exist subharmonic excitations of: (1) a pair of transverse waves in an unmagnetized plasma and (2) a pair of one right and one left circularly polarized wave in a magnetoplasma. Additionally, parametric excitation of two right or two left circularly polarized waves with different frequencies can exist in a magnetoplasma. The subharmonic excitations are impossible whenever the density gradient and the applied electric field are perpendicular. However, parametric excitation is possible with all configurations.

Type
Articles
Information
Journal of Plasma Physics , Volume 5 , Issue 1 , January 1971 , pp. 107 - 113
Copyright
Copyright © Cambridge University Press 1971

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References

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