On tenuous plasmas, fireballs, and boundary layers in the earth's magnetotail

Details On tenuous plasmas, fireballs, and boundary layers in the earth's magnetotail On tenuous plasmas, fireballs, and boundary layers in the earth's magnetotail

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.5859f&link_type=abstract

Journal of Geophysical Research, vol. 81, Dec. 1, 1976, p. 5859-5881.

Physics

29

Boundary Layer Plasmas, Fireballs, Geomagnetic Tail, High Temperature Plasmas, Magnetohydrodynamic Flow, Satellite-Borne Instruments, Electron Energy, Energy Spectra, Explorer Satellites, Magnetometers, Magnetosheath, Magnetospheric Proton Density, Plasma Heating, Plasma Probes, Plasma Spectra, Proton Energy

Scientific paper

The plasma instrumentation (the Lepedea) and the magnetometer aboard IMP 8 performed correlative measurements of magnetic fields and plasmas within the geomagnetic tail at geocentric radial distances of about 23-46 R-E during March-October 1974. The hot tenuous plasmas within the plasma sheet were found to be in a state of almost continuous flow and were threaded with northward, or closed geomagnetic lines. The satellite encountered a region of acceleration in the magnetotail, the 'fireball' which exhibits strong jetting of plasmas in excess of 1000 km/s, proton temperatures of about 10 to the 7th K, disordered magnetic fields, southward magnetic fields during tailward jetting of plasmas, and northward magnetic fields for fast plasma flows toward earth. In addition, the magnetosheath plasmas within the boundary layers which are contiguous to the plasma sheet display evidence of plasma heating, great changes in bulk flow velocities, and acceleration of energetic electrons with an energy of greater than 45 keV.

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