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Excitation of high-frequency waves with mixed polarization by streaming energetic electrons

Published online by Cambridge University Press:  13 March 2009

L. C. Lee ,
C. S. Wu ,
H. P. Freund ,
D. Dillenburg  and
J. Goedert
L. C. Lee
Affiliation:
Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742
C. S. Wu
Affiliation:
Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742
H. P. Freund
Affiliation:
Naval Research Laboratory, Washington, D.C. 20375
D. Dillenburg
Affiliation:
Instituto de Física, Universidade Federal do Rio Grande do Sul, 90000 Porto Alegre – RS, Brazil
J. Goedert
Affiliation:
Instituto de Física, Universidade Federal do Rio Grande do Sul, 90000 Porto Alegre – RS, Brazil
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Abstract

The excitation of the slow extraordinary and electron whistler modes with frequencies in the vicinity of the electron plasma frequency is investigated for a plasma which is composed of thermal and suprathermal electrons. Ion dynamics are ignored. The suprathermal electrons are assumed to comprise a long, anisotropic tail parallel to the ambient magnetic field. Instability is found to occur via a relativistic, anomalous gyroresonance with the suprathermal electrons, and to excite waves with frequencies above and below the electron plasma frequency. Landau and cyclotron damping due to the thermal background is included in the treatment.

Type
Research Article
Information
Journal of Plasma Physics , Volume 22 , Issue 2 , October 1979 , pp. 277 - 288
Copyright
Copyright © Cambridge University Press 1979

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References

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