Physics
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.7787l&link_type=abstract
Journal of Geophysical Research, vol. 86, Sept. 1, 1981, p. 7787-7791. Research supported by the Max Kade Foundation.
Physics
2
Ion Temperature, Magnetohydrodynamic Stability, Proton Energy, Solar Wind, Space Plasmas, Thermal Instability, Anisotropic Media, Ion Cyclotron Radiation, Mathematical Models, Modal Response
Scientific paper
The behavior of four temperature anisotropy instabilities in a single-component space plasma is investigated theoretically using the solar wind model (i.e., heat flux modified non-Maxwellian velocity distribution functions) proposed by Whang (1972). The linear dispersion properties are studied in an infinite Vlasov plasma where the proton distribution is assumed to consist of one warm slow-speed component and where the electron background is isotropic. It is shown that the fire hose, mirror, and Harris instability do not occur under these conditions, and that only the ion cyclotron instability is of importance in Whang's ion model. Growth rates are shown to have values between 0.021 and 0.00011. Increasing temperature anisotropy causes the range frequencies where wave particle interaction occurs to be shifted toward the ion gyrofrequency.
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