Abstract
Various self-excited motions in dusty plasmas involving spatial variations ofmacroparticle charge are considered. Two basic types of instabilities in thesesystems are examined numerically and analytically. The main attention isgiven to the vortex motions of macroparticles. Conditions suitable forcreating the instabilities examined are discussed. Experimental observationsof self-excited oscillations in dc-glow, and capacitive rf, discharges arepresented. It is shown that spatial variation of dust charge can account formany phenomena observed in inhomogeneous laboratory dusty plasmas.
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