Physics
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.2369d&link_type=abstract
Journal of Geophysical Research, vol. 87, Apr. 1, 1982, p. 2369-2376.
Physics
8
Electric Fields, Plasma-Electromagnetic Interaction, Radio Transmission, Whistlers, Anisotropy, Damping, Earth Magnetosphere, Electric Field Strength, Temperature Dependence, Wave Dispersion
Scientific paper
The dispersion relation for parallel propagating whistler waves in an electromagnetoplasma for both parallel and transverse orientation of a dc electric field has been derived. The electric field induced cyclotron instability has been studied for a wide range of parameters to show the relative importance of electric field strength, temperature anisotropy, parallel thermal velocity, and the ratio of particle pressure to magnetic pressure. It is found that the wave grows (or damps) in amplitude for a parallel (or antiparallel) electric field. In the case of the transverse dc electric field, the magnitude of growth rate and the width of the region of wave amplification in frequency domain increases with increasing temperature anisotropy. The contribution of the transverse electric field towards the wave growth is negligibly small as compared to temperature anisotropy.
Das M. L. I.
Singh Ravi P.
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