Physics
Scientific paper
Nov 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978p%26ss...26..985b&link_type=abstract
Planetary and Space Science, vol. 26, Nov. 1978, p. 985-992.
Physics
2
Magnetohydrodynamic Stability, Plasma Slabs, Ring Currents, Atmospheric Physics, Cyclotron Frequency, Cyclotron Resonance, Ionospheric Drift, Ionospheric Propagation
Scientific paper
Ordinary-mode electromagnetic instabilities that can arise in inhomogeneous, anisotropic, and loss-cone plasmas are studied. In particular, attention is given to the resonant electron instability, the resonant proton instability, and the drift cyclotron instability. It is found that the resonant instabilities can arise due to resonant interaction of either electrons or protons with a drift wave for frequencies approximately equal to the proton cyclotron frequency times some unspecified factor, while the drift cyclotron instability can be excited only in an inhomogeneous plasma for a restricted range of wave numbers. Application of the analysis to the case of ring-current and plasma-sheet particles reveals that the growth rate of the resonant electron instability is approximately equal to the growth rate of the resonant proton instability times the proton/electron mass ratio.
Bhatia K. G.
Lakhina Gurbax S.
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