Ion dynamics in the plasma mantle

Details Ion dynamics in the plasma mantle Ion dynamics in the plasma mantle

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990angeo...8..739a&link_type=abstract

Annales Geophysicae (ISSN 0992-7689), vol. 8, Nov. 1990, p. 739-753. Research supported by CNR and SNSF.

Physics

6

Geomagnetic Tail, Magnetosheath, Plasma Composition, Plasma Layers, Atmospheric Boundary Layer, International Sun Earth Explorers, Magnetic Field Configurations, Magnetopause, Plasma Diagnostics

Scientific paper

A comprehensive statistical analysis has been performed on plasma mantle data from the positive ion experiment (EGD) on ISEE-2 and the Ion Composition Experiment (ICE) on ISEE-1; the data were collected during the first six months of 1978 and 1979 in the earth's magnetotail. Particular emphasis has been placed on plasma mantle-plasma sheet crossings so as to elucidate the role of mantle plasma in the refilling of the plasma sheet. It is shown that mantle plasma contiguous to the plasma sheet is convected primarily away from the magnetopause toward the center of the tail equatorial region. Evidence is found in the data that, when the mantle plasma reaches a region close to the plasma sheet, it undergoes processes of energization and thermalization. The mantle plasma characteristics gradually change to those of the plasma sheet as observed immediately after, suggesting that the same plasma has changed properties in such a way as to become plasma sheet plasma.

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