Physics – Plasma Physics
Scientific paper
Oct 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jgr...10019321a&link_type=abstract
Journal of Geophysical Research, Volume 100, Issue A10, p. 19321-19328
Physics
Plasma Physics
7
Space Plasma Physics: Charged Particle Motion And Acceleration, Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers, Magnetospheric Physics: Plasma Convection, Space Plasma Physics: Numerical Simulation Studies
Scientific paper
The transport of magnetospheric particles in the outer cusp region is examined by means of three-dimensional single particle codes. It is shown that, at high altitudes, particles can experience nonadiabatic motions leading to significant magnetic moment changes. It is demonstrated that this nonadiabatic behavior can be interpreted, at least partly, by the action of an impulsive centrifugal force perturbing the particle gyromotion. Systematic trajectory calculations reveal that plasma sheet ions which E×B convect toward the magnetopause from low L-shells in the dayside sector are subjected to such nonadiabatic motions. As a result of magnetic moment damping, a number of them are injected into loss cone, leading to a narrow (a few tenths of a degree) latitudinal structure of precipitating ions at the equatorward edge of the dayside cusp. .
Alem F.
Delcourt Dominique C.
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