Physics
Scientific paper
Nov 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.6397k&link_type=abstract
Journal of Geophysical Research, vol. 84, Nov. 1, 1979, p. 6397-6406.
Physics
6
Convective Flow, Ion Cyclotron Radiation, Magnetohydrodynamic Flow, Magnetospheric Instability, Anisotropic Media, Atmospheric Models, Maxwell-Boltzmann Density Function, Pitch (Inclination), Rates (Per Time)
Scientific paper
In the present paper, Liouville's theorem is used in combination with approximate, but extremely accurate, expressions which reflect the invariance of the magnetic moment and the longitudinal invariant to determine analytically the evolution of an adiabatically convecting energetic particle distribution. Features of the convecting distribution, reproduced by this model, include positive pitch angle anisotropy, regions in velocity space where the nonmonotonic perpendicular energy distribution is greater than zero, and the energy dependence of the degree of particle injection. The energy dependence of the injection yields upper and lower cutoffs to the distribution within the plasmasphere, and only an upper cutoff outside. This approach is used to study the evolution of ion cyclotron waves in a convecting particle distribution.
Galland Kivelson Margaret
Kaye Stanley M.
Southwood David J.
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