Physical mechanism of the lower-hybrid-drift instability in a collisional plasma

Details Physical mechanism of the lower-hybrid-drift instability in a collisional plasma Physical mechanism of the lower-hybrid-drift instability in a collisional plasma

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jatp...43..775h&link_type=abstract

(International Symposium on Equatorial Astronomy - II, 6th, Aguadilla, PR, July 17-23, 1980.) Journal of Atmospheric and Terrest

Astronomy and Astrophysics

Astronomy

9

Collisional Plasmas, Collisionless Plasmas, Ionospheric Drift, Magnetohydrodynamic Stability, Plasma Drift, Spread F, Electron Scattering, Equatorial Atmosphere, Particle Interactions, Taylor Instability

Scientific paper

A physical discussion is presented of both collisional and collisionless plasma lower-hybrid-drift instability, which is important in being the most promising explanation of irregularities smaller than 1 m observed during equatorial spread F. The key features of this instability mode are: (1) the instability excites a drift wave propagating across the magnetic field; (2) the wave is driven by the free energy provided by the density gradient, and the energy exchange occurs via an ion-wave resonance; (3) for an ion-wave resonance to occur, the ions must be able to move across the magnetic field; and (4) electron collisions allow the electrons to absorb energy from the wave and therefore provide a damping mechanism.

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