Physics
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.1121l&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 97, Feb. 1, 1992, p. 1121-1134.
Physics
28
Magnetoplasmadynamics, Plasmasphere, Wave-Particle Interactions, Kinetics, Models, Space Plasmas
Scientific paper
The paper treats the early stages of plasmasphere refilling along an initially depleted L = 4 magnetic flux tube through a semikinetic model, with special attention given to the effects of wave-particle interactions in which stochastic diffusion of ions in perpendicular velocity due to equatorially concentrated electromagnetic ion cyclotron waves plays a central role. Characteristic individual ion trajectories are examined, as well as the devolution of bulk parameters and ion distribution functions when equal 'polar wind' streams are injected at the northern and southern ionospheres. In the ion trajectories, relatively modest and realistic perpendicular electric field power levels are found to lead to decreased mirror latitudes, substantial acceleration, and equatorial entrainment of these ions. A substantial equatorial density depletion is also found, in agreement with the results of Olsen (1992).
Brown Daniel G.
Ho Wing C.
Horwitz James L.
Lin Juhn-Jong
Wilson Gordon Ray
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