Physics
Scientific paper
Apr 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.2599b&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 93, April 1, 1988, p. 2599-2618.
Physics
50
Electrostatic Waves, Inner Radiation Belt, Wave Excitation, Whistlers, Bandwidth, International Sun Earth Explorer 1, Very Low Frequencies, Wave Propagation, Wave Scattering
Scientific paper
The excitation of electrostatic waves by whistler-mode VLF signals propagating along magnetic-field lines in and near the earth's inner radiation belt is examined on the basis of ISEE-1 observations obtained during July-December 1983. The data are presented in extensive graphs and characterized in detail. The effect is seen in about 60 percent of the ISEE-1 orbits penetrating the belt and for signals originating in both hemispheres, with an electrostatic-wave effective bandwidth roughly proportional to the local magnetic-field strength. These results are interpreted in terms of a theoretical model in which scattering of the VLF waves off magnetic-field-aligned plasma density irregularities is followed by particle pitch-angle scattering and precipitation in the radiation belt; the latter effect could then produce new irregularities via a feedback mechanism.
Bell Timothy F.
Ngo Ha-Duong
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