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Excitation of an ion-acoustic wave by two whistlers in a collisionless magnetoplasma

Published online by Cambridge University Press:  13 March 2009

M. S. Sodha ,
Tarsem Singh ,
D. P. Singh  and
R. P. Sharma
M. S. Sodha
Affiliation:
Centre of Energy Studies, Indian Institute of Technology, Hauz Khas, New Delhi-110029 (India)
Tarsem Singh
Affiliation:
Centre of Energy Studies, Indian Institute of Technology, Hauz Khas, New Delhi-110029 (India)
D. P. Singh
Affiliation:
Centre of Energy Studies, Indian Institute of Technology, Hauz Khas, New Delhi-110029 (India)
R. P. Sharma
Affiliation:
Centre of Energy Studies, Indian Institute of Technology, Hauz Khas, New Delhi-110029 (India)
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Abstract

This paper presents an investigation of the excitation of an ion-acoustic wave in a collisionless hot magnetoplasma by two whistlers. On account of the interaction of the two whistlers, of frequencies ω1 and ω2, ponderomotive force at frequency △ ω(= ω1 – ω2) leads to the generation of an ion-acoustic wave. When the two whistlers have initially Gaussian intensity distributions, a d.c. component of the ponderomotive force leads to the redistribution of the background electron/ion density, and cross-focusing of the whistlers occurs. The power of the generated ion-acoustic wave, being dependent on the background ion density and powers of the whistlers, is further modified. The ion-acoustic wave power also changes drastically with the strength of the static magnetic field.

Type
Research Article
Information
Journal of Plasma Physics , Volume 25 , Issue 2 , April 1981 , pp. 255 - 265
Copyright
Copyright © Cambridge University Press 1981

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References

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