Other
Scientific paper
Jun 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jgr....95.8085g&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 95, June 1, 1990, p. 8085-8094. Research sponsored by DOE.
Other
32
Boundary Layer Stability, Computerized Simulation, Electron Distribution, Geomagnetic Tail, Magnetohydrodynamic Stability, Plasma Layers, Proton Scattering, Earth Magnetosphere, International Sun Earth Explorers, Ion Cyclotron Radiation
Scientific paper
Computer simulations were used to study the growth of electromagnetic instabilities, saturation, and proton scattering associated with a counterstreaming proton model which represents plasma distributions observed in the plasma sheet boundary layer of the earth's magnetotail by ISEE-1 and -2. Two types of growing modes were studied: the ion cyclotron anisotropy instability driven by the temperature anisotropy of individual ion components, and two different ion/ion instabilities driven by the relative streaming of two ion components. It was found that both instabilities do not produce significant ion scattering. On the other hand, a study of the proton/proton nonresonant excitation of the ion/ion unstable modes showed that these instabilities reach large amplitudes and yield considerably stronger scattering. It is concluded that electromagentic ion/ion istabilities are a possible mechanism by which the hot streaming proton components of the plasma sheet boundary layer become the single very hot isotropic proton component of the central plasma sheet.
Gary Peter S.
Winske Dan
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