Physics
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....9716833d&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A11, p. 16,833-16,842.
Physics
20
Magnetopause, Magnetospheric Proton Density, Nonadiabatic Conditions, Space Plasmas, Particle Trajectories, Solar Wind, Three Dimensional Models
Scientific paper
The dayside to nightside circulation of plasma along the magnetopause inside the magnetosphere is examined by means of three-dimensional single-particle codes. It is demonstrated that particles incident upon the outer cusp region experience transient non-adiabatic motions, owing to a localized minimum in the field magnitude. Here, possibly large magnetic moment changes yield injection into the loss cone of fractions of the incoming population or, alternatively, enhanced bouncing motions at high altitudes. It is shown that particles gaining access to the magnetotail over the polar cap are progressively extracted from the weak field region by the large-scale convection electric field. In this latter case, the trajectory simulations suggest an implicit 'entry boundary' into the nightside magnetosphere, which corresponds to the sunward edge of field lines featuring monotonic decrease of the field magnitude along their length.
Chappell Charles R.
Delcourt Dominique C.
Moore Thomas Earle
Sauvaud Jean-Andre
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