Physics
Scientific paper
Sep 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.5099d&link_type=abstract
Journal of Geophysical Research, vol. 84, Sept. 1, 1979, p. 5099-5121.
Physics
51
Geomagnetic Tail, Magnetohydrodynamic Flow, Plasma Layers, Rarefied Plasmas, Atmospheric Models, Explorer Satellites, Magnetic Storms, Protons, Velocity Distribution
Scientific paper
Plasmas on the surface of the plasma sheet at its interface with high-latitude lobes are studied at about 30-40 earth radii (Re) in the tail of the earth's magnetosphere with Lepedea plasma instrumentation on board the earth-orbiting Imp 7 and Imp 8 satellites. Protons at this interface are frequently found to be flowing toward earth with velocities greater than 400 km/s. Proton bulk speeds measured near the plasma sheet surface are typically greater than those at locations deeper within the plasma sheet. Ten of the twenty cases studied exhibit plasma sheet cooling. Typical plasma sheet conditions are observed to prevail deep within the plasma sheet coincident with the earthward streaming at the boundary of the plasma sheet. A three-parameter model is described that explains the velocity distributions measured for the earthward-jetting plasma.
Decoster R. J.
Frank Louis A.
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