Physics
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....9811411r&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A7, p. 11,411-11,423.
Physics
9
Auroral Arcs, Boundary Layer Plasmas, Earth Magnetosphere, Geomagnetism, Discrete Functions, Kinetic Equations, Plasma Density
Scientific paper
The electrical structure of the sheath that separates magnetospheric particle populations of different densities and temperatures is modeled within the framework of a kinetic theory for tangential discontinuities. With plasma parameters typical of the earth's outer magnetosphere and plasma sheet, results bearing many features pertinent to magnetospheric processes, specifically the origin of discrete auroral arcs, are obtained. The creation of a space-charge separation electrostatic potential in a direction normal to the magnetic field results from the contact of the two plasma populations. Wave particle interactions are likely to scatter the electrons into the atmospheric loss cone, establishing the current system threading both the electromotive force and the ionsophere by means of field-aligned currents.
Evans Silvan D.
Lemaire Joseph
Roth Marcel
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