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Effects of solar wind composition, anisotropy, and streaming on ordinary mode electromagnetic instabilityThe stability of the low-frequency waves propagating transverse to the magnetic field of a plasma composed of electrons, protons, and alpha particles with anisotropic electron and ion temperatures is explored. The threshold for the ordinary mode instability and the growth rates have a very strong dependence on the electron temperature anisotropy but have a comparatively weaker dependence on the ion temperature anisotropy, on the relative abundance of helium to hydrogen, and on the relative streaming of two ion species. The threshold for the instability of these low-frequency waves is (m sub e/m sub p) to the 1/2 power times smaller than the one corresponding to high-frequency waves; however, for a relative abundance of helium to hydrogen up to 20% for the relevant known magnetic fields, particle densities, temperatures, and drifts, the solar wind remains below the threshold for this instability.
Document ID
19740032610
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Buti, B.
(NASA Ames Research Center Space Sciences Div., Moffett Field, Calif., United States)
Date Acquired
August 7, 2013
Publication Date
December 1, 1973
Publication Information
Publication: Journal of Geophysical Research
Volume: 78
Subject Category
Space Radiation
Accession Number
74A15360
Distribution Limits
Public
Copyright
Other

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