Other
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.1511h&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 97, Feb. 1, 1992, p. 1511-1519. Research supported by Universities Space
Other
28
Magnetoplasmadynamics, Planetary Magnetospheres, Planetary Rotation, Rotating Plasmas, Space Plasmas, Electric Fields, Polarization
Scientific paper
Spatial variations of density and temperature along a magnetic field line are evaluated for a plasma undergoing adiabatic motion in a rotating magnetosphere. The effects of centrifugal and gravitational forces are accounted for, as is anisotropy in the pitch angle distribution functions of individual species. A polarization electric field is invoked to eliminate the net electric charge density resulting from the aforementioned mass dependent forces and different anisotropies. The position of maximum density in a two-component, electron-ion plasma is determined both in the absence and in the presence of the polarization effect and compared. A scale height, generalized to include anisotropies, is derived for the density fall-off. The polarization electric field is also included in the parallel guiding center equation; equilibrium points are determined and compared in both individual and average senses with the position of density maximum. Finally a transverse (to magnetic field lines) electric component is deduced as a consequence of dissimilar charge neutralization on adjacent field lines. The E x B velocity resultant from such a 'fringing' electric field is calculated and compared with the magnitude of other drifts.
Birmingham Thomas J.
Huang Thomas S.
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