Abstract

A cross-field instability is considered in a magnetized, dusty plasma acted upon by a gravity field, g , perpendicular to the magnetic field, B , permeating the plasma. Waves are produced traveling essentially with the dust grains zero-order motion. The condition for excitation of the instability is that the dust zero-order velocity perpendicular to both g and B exceed the dust-acoustic speed, C da . Numerical results are presented for an ionospheric type plasma and for a laboratory type plasma.

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