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Author Kerns, K. J. ♦ Hardy, D. A. ♦ Gussenhoven, M. S.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ PLASMA SHEET ♦ BOUNDARY LAYERS ♦ IONS ♦ DIFFUSION ♦ CONVECTION ♦ ELECTRONS
Abstract The authors show how often a simple convection model can explain the structure seen in 120-eV to 28-keV particles at the inner boundary of the Earth`s plasma sheet. A total of 1346 samples of the boundary were made over a 14-month period using the low-energy plasma analyzer on the CRRES satellite. The cutoff energy below which enhanced fluxes of electrons are seen during the passage into the boundary increased with L shell; the opposite was observed for ions. Forty to 50 percent of the cutoffs sampled on the nightside of the Earth were consistent with those derived from a convection model with one variable parameter. The model was normally inconsistent with cutoffs measured during increasing activity and with those made on the day side. For consistent cases a correlation of {approximately}0.9 was found between the zero energy Alfven layer at midnight and the midnight equatorward boundary measured by the DMSP satellite. 36 refs., 8 figs., 3 tabs.
ISSN 01480227
Educational Use Research
Learning Resource Type Article
Publisher Date 1994-02-01
Publisher Place United States
Journal Journal of Geophysical Research
Volume Number 99
Issue Number A2


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