Other
Scientific paper
Nov 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.5583l&link_type=abstract
Journal of Geophysical Research, vol. 81, Nov. 1, 1976, p. 5583-5586. NASA-supported research.
Other
10
Earth Magnetosphere, Electric Fields, Magnetic Mirrors, Magnetically Trapped Particles, Atmospheric Models, Current Density, Electron Precipitation, Energy Transfer, Hot Electrons, Plasma Conductivity, Spatial Distribution
Scientific paper
Among the different proposed mechanisms for generating parallel electric fields, magnetic mirroring of charged particles seems to be the most plausible. In the present paper, it is suggested that magnetic mirroring is the basic cause of parallel electric fields in the magnetosphere and that the magnetic mirroring effect may be able to form the basis of an auroral theory that can remove a major portion of the ambiguity of observations. In the model proposed, the parallel electric field is due to a magnetic confinement of a negatively charged hot collision-free plasma. A transfer of electron gyroenergy into wave energy tends to weaken this confinement; if this energy transfer becomes too strong, the parallel potential gradient will break down. Hence, from this model, in contrast to certain other models of parallel electric fields, only a small fraction of the total auroral particle energy may be expected to be transformed into electromagnetic wave energy during the acceleration process.
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