Survey of plasma parameters in Earth's distant magnetotail with the Geotail spacecraft

Details Survey of plasma parameters in Earth's distant magnetotail with the Geotail spacecraft Survey of plasma parameters in Earth's distant magnetotail with the Geotail spacecraft

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.2971p&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 25, p. 2971-2974

Physics

27

Cold Plasmas, Flow Velocity, Geomagnetic Tail, High Temperature Plasmas, Magnetohydrodynamic Flow, Satellite Observation, Space Plasmas, Three Dimensional Flow, Electron Density (Concentration), Electron Energy, Geophysical Satellites, Ion Density (Concentration), Ion Temperature, Satellite-Borne Instruments, Velocity Distribution

Scientific paper

The three-dimensional velocity distributions for both electrons and positive ions as determined with plasma instrumentation on board the Geotail spacecraft are used to compute number densities, ion bulk velocities, and electron and ion temperatures. We present a statistical survey of these plasma parameters for the magnetotail at distances from Earth in the range of 10 to 210 R(sub E) for the period 19 October 1992 through 10 July 1993. The ion temperature is used to discriminate 'hot' plasmas from 'cold' plasmas. The hot ion plasmas are frequently found to stream either towards or away from Earth and we identify these with the plasma sheet, plasma sheet boundary layer, and regions of acceleration. The cold ion plasmas are typically streaming away from Earth. These cold plasmas appear to be associated with the plasma mantle, the magnetosheath, and boundary layers interior to the magnetosheath, although the contribution from the ionosphere has not yet been evaluated.

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