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Parametric excitation of a kinetic Alfvén wave at the ion-cyclotron frequency

Published online by Cambridge University Press:  13 March 2009

Zehra Hasan  and
S. Guha
Zehra Hasan
Affiliation:
Department of Physics, Ravishankar University, Raipur, India
S. Guha
Affiliation:
Department of Physics, Ravishankar University, Raipur, India
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Abstract

The parametric decay of an electrostatic ion-cyclotron wave into a low-frequency mixed-mode (EM-ES) kinetic Alvén wave and an electrostatic ion-cyclotron side-band has been investigated in a homogeneous low-β plasma. A nonlinear dispersion relation describing this parameteric interaction is derived. The partially electrostatic nature of the kinetic Alfvén wave and the component of the low-frequency ponderomotive force along the direction of the external magnetic field lead to the dominant coupling. Possible applications in the ionosphere, in the earth's magnetosphere and in laboratory plasmas are discussed.

Type
Research Article
Information
Journal of Plasma Physics , Volume 43 , Issue 3 , June 1990 , pp. 457 - 463
Copyright
Copyright © Cambridge University Press 1990

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References

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