Physics
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jatp...54..479k&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 54, Mar.-Apr. 1992, p. 479, 480.
Physics
Beam Interactions, Electron Beams, High Energy Electrons, Magnetospheric Electron Density, Propagation Modes, Whistlers, Very Low Frequencies, Wave Propagation
Scientific paper
The dispersion relation for whistler-mode waves in the presence of an idealized beam of energetic electrons that is moving either parallel or antiparallel to the gyroresonant electrons is analyzed. The dependence of the real part of the dispersion relation on the velocity of the beam is shown to be responsible for an additional growth rate, for the beam antiparallel to the gyroresonant electrons, or for a reduced growth rate for the parallel condition. The effect could be important in explaining some features of VLF emissions such as hiss which propagate through the magnetosphere in the opposite direction to the gyroresonant electrons.
Kulkarni V. H.
Rycroft Michael J.
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