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Ion-acoustic instabilities driven by an ion velocity ring

Published online by Cambridge University Press:  13 March 2009

K. Akimoto ,
K. Papadopoulos  and
D. Winske
K. Akimoto
Affiliation:
Department of Physics and Astronomy, University of Maryland, College Park, MD 20742
K. Papadopoulos
Affiliation:
Department of Physics and Astronomy, University of Maryland, College Park, MD 20742
D. Winske
Affiliation:
Applied Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545
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Abstract

A ring distribution of ions in velocity space can generate electrostatic waves which propagate predominantly along an ambient magnetic field at frequencies comparable with the ion plasma frequency. A dispersion equation which accounts for these waves is presented, and solved analytically and numerically. It was found that ion-acoustic-like waves are excited in a plasma even if the electron temperature is comparable with the ion temperature under the assumption of an anisotropic ion distribution.

Type
Research Article
Information
Journal of Plasma Physics , Volume 34 , Issue 3 , December 1985 , pp. 467 - 479
Copyright
Copyright © Cambridge University Press 1985

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References

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