Physics
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982georl...9..159h&link_type=abstract
Geophysical Research Letters, vol. 9, Feb. 1982, p. 159-162.
Physics
84
Electric Fields, Magnetohydrodynamic Flow, Magnetopause, Plasma Clouds, Plasma Jets, Polarization (Charge Separation), Atmospheric Models, International Sun Earth Explorers, Particle Interactions, Solar Wind
Scientific paper
The considered investigation is concerned with a study of the process of localized plasma entry on the basis of first principles. Since the magnetopause often moves at high velocities, an induction electric field must be involved. Attention is given to the case in which the adjacent magnetopause is at rest. Occasionally, a frame moving with the magnetopause in the interaction region is also considered. The employed model is based on the observations provided by ISEE. The considered plasma irregularity, which is denominated a 'cloud', may not have to be a large enhancement in number density or velocity. An examination of the involved physical relations shows that the plasma will create its own electric field, via a polarization current, to make possible a penetration through the magnetopause by the cloud. At the magnetopause the polarization current creates a charge separation electric field which promotes (rather than inhibits) continued flow through the moving magnetopause.
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