Physics
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993p%26ss...41..199t&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 41, no. 3, p. 199-207.
Physics
13
Charged Particles, Distribution Functions, Drift, Particle Trajectories, Plasma Pressure, Plasma Resonance, Electric Fields, Space Plasmas, Wave-Particle Interactions
Scientific paper
Drift wave instability has been studied using the loss-cone distribution function by investigating trajectories of charged particles in the presence of a wave electric field. A low-beta (ratio of plasma pressure to magnetic pressure) plasma, consisting of resonant and non-resonant particles, has been considered. It is assumed that the resonant particles participate in energy exchange with the wave, whereas non-resonant particles support the oscillatory motion of the wave. A dispersion relation has been derived in the electrostatic approximation and the growth rate is evaluated by the energy conservation method. Effects of steepness of loss-cone distribution with temperature anisotropy are discussed with regard to the dispersion relation and the growth rate of the instability. Destabilizing effects due to steepness of the loss-cone and temperature anisotropy have been predicted.
Tiwari M. S.
Varma P.
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