Physics
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.2785j&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 25, p. 2785-2788
Physics
33
Charge Exchange, Charged Particles, Coulomb Collisions, Earth Magnetosphere, Energy Dissipation, Ion Currents, Kinetic Theory, Mathematical Models, Ring Currents, Electric Fields, Geomagnetism, Magnetospheric Proton Density, Particle Acceleration, Particle Motion, Planetary Magnetic Fields, Velocity Distribution
Scientific paper
A bounced-averaged ring current kinetic model for arbitrary pitch angle, including losses due to charge exchange and Coulomb collisions along ion drift paths, is developed and solved numerically. Results from simplifield model runs, intended to illustrate the effects of adiabatic drifts and collisional losses on the proton population, are presented. The processes of: (1) particle acceleration under the conditions of time-independent magnetospheric electric fields; (2) a predominant loss of particles with small pitch angles due to charge exchange; and (3) a buildup of a low-energy population caused by the Coulomb drag energy degradation, are discussed.
Fok Mei Ching
Jordanova Vania K.
Khazanov George V.
Kozyra Janet U.
Nagy Andrew F.
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