Physics
Scientific paper
Sep 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17.1605h&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 17, Sept. 1990, p. 1605-1608.
Physics
4
Electric Fields, Electron Beams, Electron Precipitation, Ionospheric Drift, Magnetohydrodynamic Waves, Plasma Drift, Current Sheets, Ion Motion, Magnetohydrodynamic Stability, Magnetopause
Scientific paper
An expression for the parallel electric field in more general coordinates (flux coordinates) without invoking a resonant mode conversion process is presented. The variation of the parallel field along the magnetic line of force is discussed. It is indicated that the parallel electric field induces parallel ion motion as well as the precipitation of electrons. The former, when coupled with Maxwell's equations, provides self-consistent field equations which describe coupling between the drift wave and the kinetic Alfven wave, e.g., Hasegawa (1975). Thus, observations of narrowly confined precipitating electron beams near the magnetopause (Rezeau et al. 1989; Fukunishi, 1989) and plasma sheet boundaries (Rostoker and Eastman, 1987; Roux, 1985; Kremser et al. 1988) may be explained by the mechanism described.
Hasegawa Akira
Maclennan Carol G.
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