Computer Science
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988p%26ss...36.1181s&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 36, Nov. 1988, p. 1181-1199.
Computer Science
13
Earth Magnetosphere, Energetic Particles, Geomagnetism, Particle Beams, Plasma Layers, Explorer 50 Satellite, Ion Accelerators, Magnetic Storms, Solar Flares
Scientific paper
Fine-time resolution (about 10 s) observations of bursts of energetic particles inside the earth's plasma sheet by the IMP-8 spacecraft, reveal that the detailed structure of the time-intensity profiles of the ion bursts often display the 'inverse velocity dispersion' effect, whereby the low energy (about 300 keV) ion intensity enhancements are detected before the higher energy (about 1 MeV) ones. In particular, it is shown that long duration (several minutes or more) bursts of energetic particles are composed of a series of highly anisotropic, short duration impulsive bursts, which last a few tens of seconds and display the inverse velocity dispersion characteristic. Furthermore, it is demonstrated that the inverse velocity dispersion effect is observed: (1) both inside the plasma sheet and at its high latitude boundary; (2) during periods of thinning as well as expansion of the plasma sheet; and (3) for both tailward and earthward streaming of the energetic ions.
Sarafopoulos D. V.
Sarris Emmanuel T.
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