Precipitation of ions induced by nonadiabatic motion in the outer cusp region

Details Precipitation of ions induced by nonadiabatic motion in the outer cusp region Precipitation of ions induced by nonadiabatic motion in the outer cusp region

Jan 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996adspr..18..305a&link_type=abstract

Advances in Space Research, Volume 18, Issue 8, p. 305-308.

Physics

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 ExB convert 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 the loss cone and subsequently precipitate near the cusp equatorward edge.

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