Physics
Scientific paper
Mar 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80..943l&link_type=abstract
Journal of Geophysical Research, vol. 80, Mar. 1, 1975, p. 943-950.
Physics
10
Electron Distribution, High Energy Electrons, Radiation Belts, Time Dependence, Earth Magnetosphere, Explorer Satellites, Geomagnetism, Magnetic Storms, Pitch (Inclination), Radial Distribution, Satellite Observation
Scientific paper
Detailed Explorer 45 observations of quiet time pitch angle distributions and equatorial radial profiles of energetic radiation belt electrons are presented. The observed pitch angle distributions in the slot region and the outer regions of the plasmasphere are found to agree with the values expected from resonant interactions with the plasmaspheric whistler mode wave band, and Coulomb collisions are found to be the dominant electron loss mechanism in the inner zone. The overall structure of quiet time radial profiles is shown to agree with the equilibrium structure expected to result from a balance between pitch angle scattering losses and radial diffusion from an outer zone source, and this agreement suggests that the dominant quiet time source and loss mechanisms have been correctly identified. Electron fluxes in the inner plasmasphere are found to remain nearly constant during the quiet periods due to their decoupling from magnetic activity variations in the outer plasmasphere.
Lyons Larry R.
Williams Jimmy D.
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