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Electrostatic instabilities in anti-loss-cone plasma

Published online by Cambridge University Press:  13 March 2009

K. G. Bhatia  and
G. S. Lakhina
K. G. Bhatia
Affiliation:
Indian Institute of Geomagnetism, Colaba, Bombay 400 005, India
G. S. Lakhina
Affiliation:
Indian Institute of Geomagnetism, Colaba, Bombay 400 005, India
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Abstract

It is shown that both lower hybrid and modified electron acoustic instabilities can be excited in a hot anti-loss-cone plasma co-existing with a rarefied cold plasma, provided the anti-loss-cone factor, ρ, exceeds a value Tm/Tt, where Tm and Tt are the parallel temperatures of missing and trapped electrons respectively. These instabilities are excited in a bounded range of wavenumbers and the growth rates are enhanced with the increase of cold plasma density. For

Tm/Tt < ρ > (Tm/Tt)½

both the instabilities are of resonant type whereas for ρ > (Tm/Tt)½ both may be converted into non-resonant types. These instabilities are expected to give rise to the heating of protons as well as electrons in the magnetosphere beyond the plasmapause.

Type
Research Article
Information
Journal of Plasma Physics , Volume 19 , Issue 2 , April 1978 , pp. 193 - 199
Copyright
Copyright © Cambridge University Press 1978

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