Plasma regimes in the deep geomagnetic tail - ISEE 3

Details Plasma regimes in the deep geomagnetic tail - ISEE 3 Plasma regimes in the deep geomagnetic tail - ISEE 3

Sep 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983georl..10..912b&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 10, Sept. 1983, p. 912-915. Research sponsored by the U.S. Department of Ene

Physics

79

Current Sheets, Electron Density (Concentration), Geomagnetic Tail, Plasma Currents, Solar Wind, Spaceborne Experiments, Boundary Layer Plasmas, Electron Probes, Flow Velocity, Magnetosheath, Plasma Layers, Space Probes

Scientific paper

The spacecraft remained close to or within a previously unexplored part of the distant (60-220 earth radii) geomagnetic tail nearly continuously from January 1 to March 30, 1983. Analysis of the data reveals that all of the plasma regimes identified previously with near-earth measurements (plasma sheet, low-latitude boundary layer, plasma mantle, lobe, and magnetosheath) remain recognizable in the distant tail. These regimes, however, are found to be intermingled in a more chaotic fashion than near the earth. Within the plasma sheet at approximately 200 earth radii, typical flow velocities are about 500 km/s tailward, considerably higher than in the near-earth plasma sheet. Earthward flow within the plasma sheet is observed occasionally, indicating the temporary presence of a neutral line beyond 220 earth radii. Also found are strong bidirectional electron anisotropies throughout much of the distant plasma sheet, boundary layer, and magnetosheath.

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