Other
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90...65g&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Jan. 1, 1985, p. 65-72. Research sponsored by the U.S. Department of
Other
33
Interplanetary Magnetic Fields, Ion Beams, Magnetohydrodynamic Stability, Wave Interaction, Computerized Simulation, Ion Distribution, Linear Equations, Polarization (Waves)
Scientific paper
The wave-particle interactions of a hot ion beam streaming along a magnetic field B are studied. A second-order theory of electromagnetic instabilities in a homogeneous, collisionless plasma at propagation parallel to B is used. The two instabilities most likely to be driven by a hot beam are the right-hand and left-hand resonant ion beam instabilities. If the conditions necessary for the validity of the theory are met, the two modes are found to reinforce one another. Thus this theory predicts that whenever sufficiently hot or "diffuse" ions are found at a collisionless shock and the plasma is sufficiently homogeneous that significant wave growth is possible, ion beam instabilities will act to produce a mixture of both right- and left-hand polarized MHD-like waves.
Gary Peter S.
Tokar Robert L.
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