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Short-life mode of electrostatic electroncyclotron harmonic waves

Published online by Cambridge University Press:  13 March 2009

Hiroshi Oya
Hiroshi Oya
Affiliation:
Ionosphere Research Laboratory, Kyoto University, Uji, Kyoto, Japan
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Abstract

Dispersion curves of electrostatic electron cyclotron harmonic waves with a phase exp {i(k. r – ωt)}, where ω and k are the angular frequency and wave vector, respectively, are calculated numerically for a case of real ω and complex k that is pertinent for a case of pulsed short dipole excitation of plasma waves. Oblique propagation with respect to the ambient magnetic field direction is considered. There are positive κi and negative κi modes, where k is the imaginary part of the wave number κ = ∣κ∣ in the solutions. The energy propagates in opposite directions in the two modes, and the waves are always subjected to thermal damping. The positive κi mode usually indicates a large κi value (i.e. a large attentuation rate); and it is here called the ‘short-life’ mode.

Type
Research Article
Information
Journal of Plasma Physics , Volume 8 , Issue 2 , October 1972 , pp. 183 - 196
Copyright
Copyright © Cambridge University Press 1972

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References

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