Physics
Scientific paper
Sep 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80.3528k&link_type=abstract
Journal of Geophysical Research, vol. 80, Sept. 1, 1975, p. 3528-3534.
Physics
8
Earth Magnetosphere, Electric Fields, Magnetohydrodynamics, Proton Energy, Adiabatic Conditions, Atmospheric Models, Electron Energy, Lines Of Force, Magnetic Dipoles, Particle Energy, Pitch (Inclination), Stagnation Point
Scientific paper
An approximate relation between energy and equatorial radial distance for a particle of given equatorial pitch angle moving adiabatically in a dipole magnetic field is used to describe the Alfven layer for particles of arbitrary pitch angle. The convection electric field is assumed to be uniform in the equatorial plane of the magnetosphere, and magnetic field lines are taken to be equipotentials in the region traversed by the magnetospheric particles being studied. Approximate solutions in the high- and low-energy limits are given in a form directly applicable to the interpretation of measurements at fixed particle energy and pitch angle. These results are particularly useful for electrons, since the approximations provide lower bounds to the exact solutions. The results are used to interpret recent Explorer 45 electron measurements of Williams et al. (1974).
Galland Kivelson Margaret
Southwood David J.
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