Physics
Scientific paper
Oct 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.5781g&link_type=abstract
Journal of Geophysical Research, vol. 84, Oct. 1, 1979, p. 5781-5791. Research supported by the Swiss National Science Foundati
Physics
7
Energetic Particles, Ion Distribution, Ionospheric Ion Density, Plasma Clouds, Plasma Layers, Abundance, Auroral Zones, Electron Spectroscopy, Energy Distribution, Energy Spectra, Mass Spectroscopy, Satellite Observation
Scientific paper
A study of downward flowing field aligned ion distributions observed by the S3-3 satellite in the high altitude auroral ionosphere where ions are generally accelerated upward is presented. Downward flowing ion events are much less frequent indicating that the energetic upward flowing ions are injected into the trapped population of the plasma sheet, and that parallel electric fields are directed preferentially upward in the altitude range from 2000 km to about 3 R sub E. The results suggest that upward flowing ions from the auroral acceleration regions are responsible for both the downward flowing ions and for some of the plasma clouds, and a significant fraction of the equatorial substorm injected plasma clouds may result from this ionospheric source region.
Ghielmetti Arthur G.
Johnson Richard G.
Sharp R. D.
Shelley Edward G.
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