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IJPAP Vol.48(05) [May 2010] >


Title: Study of electromagnetic ion-cyclotron waves with general loss-cone distribution and multi-ions plasma-particle aspect approach
Authors: Ahirwar, G
Varma, P
Tiwari, M S
Keywords: Electromagnetic ion-cyclotron instability
Auroral acceleration region
Solar plasma
Loss-cone distribution function
Multi-component plasma
Particle aspect approach
Issue Date: May-2010
Publisher: CSIR
Abstract: Electromagnetic ion-cyclotron (EMIC) waves with multi-component plasma have been studied by single particle approach with general loss-cone distribution function at different plasma densities. The dispersion relation and growth rate of the electromagnetic ion-cyclotron waves with multi-component plasma have been investigated. The effect of the steepness of the general distribution function in a low (ratio of plasma pressure to magnetic pressure) homogeneous plasma with different densities has been studied with multi-ions plasma. The wave is assumed to propagate parallel to the static magnetic field. The whole plasma is considered to consist of resonant and non-resonant particles. It is assumed that resonant particles participate in energy exchange with the wave, whereas non-resonant particles participate in the oscillatory motion of the wave. The effect of general loss-cone distribution function with varying plasma density is to enhance the wave growth of EMIC waves with multi-ions plasma (H+, He+ and O+). The loss-cone distribution acts as the source of free energy. The results are interpreted for the space plasma parameters appropriate to the auroral acceleration region of the earth’s magneto-plasma.
Page(s): 334-342
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.48(05) [May 2010]

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