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Lower hybrid oscillating two-stream instability in a plasma with magnetic shear

Published online by Cambridge University Press:  13 March 2009

J. M. Wersinger ,
A. H. Kritz  and
F. Troyon
J. M. Wersinger
Affiliation:
Ecole Polytechnique Fédérale de Lausanne, Switzerland
A. H. Kritz
Affiliation:
Ecole Polytechnique Fédérale de Lausanne, Switzerland, and Plasma Physics Laboratory, Princeton University, Princeton, N.J. 08540
F. Troyon
Affiliation:
Ecole Polytechnique Fédérale de Lausanne, Switzerland
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Abstract

Magnetic shear is found to have a strong effect on the propagation characteristics of the lower hybrid parametric daughter waves but no significant effect on the pump wave. The analysis of the OTS instability shows that the convective damping introduced by magnetic shear acts on a distance L⋍ H(me/mi)½, where H is the magnetic shear scale length. There are two regimes for the convective damping, depending on the wavelength of the parametric daughter waves. For small wavelengths the growth rates are linear functions of (kL)-1. For large wavelengths the growth rates are exponentially decreasing functions of (kL)-1.

Type
Research Article
Information
Journal of Plasma Physics , Volume 22 , Issue 1 , August 1979 , pp. 71 - 84
Copyright
Copyright © Cambridge University Press 1979

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