Abstract
A strong radial electric field E r is produced in an inhomogeneous plasma column under a weak magnetic field B by applying a dc voltage between a cathode and a heating anode of hollow cylindrical type. Then, the lower hybrid drift instability is excited by a cross-field current due to E r × B drift of electrons. Experimental results of the instability are explained by the dispersion equation, where a negative energy wave of a drifting electron beam interacts with the lower hybrid wave in the background plasma. As the instability is developed, the radial electron current increases and hot ions up to 1 keV are produced.
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