Excitation of whistler mode instability by high energy electrons in the magnetosphere

Details Excitation of whistler mode instability by high energy electrons in the magnetosphere Excitation of whistler mode instability by high energy electrons in the magnetosphere

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986p%26ss...34..337s&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 34, April 1986, p. 337-351.

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Earth Magnetosphere, High Energy Electrons, Magnetohydrodynamic Stability, Plasma-Electromagnetic Interaction, Propagation Modes, Whistlers, Maxwell-Boltzmann Density Function, Plasma-Particle Interactions, Velocity Distribution, Wave Propagation

Scientific paper

Propagation of whistler mode waves through magnetospheric plasma characterized by a double Maxwellian velocity distribution function has been considered. The presence of a high energy electron tail in the composite velocity distribution function provides the needed free energy which excites instability mechanism for propagating whistler mode waves. The presence of the parallel or the antiparallel electric field governs the growth/decay rate variation with normalized parameter. These results are found to be different from those reported, which have used other forms of electron velocity distribution functions. The dependence of growth/decay rate on magnetospheric parameters plays an important role in the interpretation of wave features recorded by in situ measurements. The presence of a fraction of high energy tail electrons penetrating through magnetospheric plasma exhibits significant change in the growth/decay rate of whistler mode waves.

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