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Microinstabilities excited by energetic ring current protons

Published online by Cambridge University Press:  09 September 2003

S. MOOLLA  and
R. BHARUTHRAM
S. MOOLLA
Affiliation:
Department of Physics, University of Durban-Westville, Durban, South Africa
R. BHARUTHRAM
Affiliation:
Director of Research, University of Natal, Durban 4001, South Africa (Bharuthramr@nu.ac.za)
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Abstract

It is well known that energetic protons having a ring-type, anisotropic velocity distribution can generate low-frequency electromagnetic waves, propagating nearly transverse to the geomagnetic field lines, in the ring current region of the Earth's magnetosphere by exciting mode 1 and mode 2 non-resonant instabilities and a resonant instability. In this paper, detailed investigations of the resonant and non-resonant instabilities are conducted as a function of plasma parameters such as ring speeds, electron temperatures, magnetic field strength and wave propagation directions. Our analysis is for parameters corresponding to the ring current region of the Earth's magnetosphere.

Type
Papers
Information
Journal of Plasma Physics , Volume 69 , Issue 5 , October 2003 , pp. 383 - 395
Copyright
© 2003 Cambridge University Press

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