Physics
Scientific paper
Mar 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.1613g&link_type=abstract
Journal of Geophysical Research, vol. 86, Mar. 1, 1981, p. 1613-1616. Research sponsored by the U.S. Department of Energy;
Physics
6
Cold Plasmas, Earth Magnetosphere, High Temperature Plasmas, Magnetohydrodynamic Stability, Plasma Density, Plasma Drift, Space Plasmas, Electron Energy, Ion Temperature, Magnetospheric Electron Density, Magnetospheric Ion Density, Plasma Composition, Plasma Frequencies, Plasma Slabs, Plasma Temperature, Vlasov Equations
Scientific paper
The linear Vlasov dispersion relation for the lower hybrid density drift instability is studied in a four component (hot electrons and protons, cold electrons and protons) plasma. The introduction of a cold ion population monotonically reduces the maximum growth rate of the instability. Reduction of the ratio of temperatures of the cold and hot plasmas reduces both the real frequency and the growth rate of the instability. Near a ratio of the cold and hot plasma temperatures of 0.01 a higher frequency branch of this instability emerges and for a fixed ratio of cold and hot electron density exhibits an increasing maximum growth rate as the ratio of the cold and hot plasma temperatures decreases further. The ratio of the cold and hot plasma temperatures for the ions is the crucial parameter and deserves detailed magnetospheric studies.
Ashour-Abdalla Maha
Gary Peter S.
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