Physics
Scientific paper
Apr 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.2480s&link_type=abstract
Journal of Geophysical Research, vol. 86, Apr. 1, 1981, p. 2480-2486.
Physics
41
Boundary Layer Plasmas, Energetic Particles, Geomagnetic Tail, Magnetohydrodynamic Flow, Plasma-Particle Interactions, Space Plasmas, Electron Energy, International Sun Earth Explorer 1, Ion Temperature, Magnetic Storms, Magnetospheric Instability, Particle Motion, Plasma Waves
Scientific paper
A description of energetic ion and electron behavior in the geomagnetic plasma sheet boundary layer is presented based on observations made by the medium-energy particle experiment on board ISEE 1. Three-dimensional observations of ions of energies 24-2081 keV and electrons of energies 22.5-1200 keV were obtained by the NOAA/WAPS instrument near the center of the magnetotail at a distance of approximately 15 earth radii. Large-scale motions of plasma sheet energetic particles are observed as an apparent result of a series of magnetospheric disturbances (substorms), which are characterized by substantial contractions and expansions. Ion flow velocity in a distinct boundary layer in energetic ions has been found to be in the earthward direction in each of the five ISEE 1 boundary crossings. Boundary layer motion during one of these crossings is interpreted as large-amplitude boundary waves with periodicities of a few minutes superimposed on the general plasma sheet behavior associated with the substorm process.
Fritz Teresa A.
Spjeldvik Walther N.
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