TEMPERATURE-GRADIENT-DRIVEN FLOWS OF IONS AND NEUTRALS IN DUSTY PLASMAS

It is shown that in low-temperature plasma devices with pulsed externa l current circuits such as thermal emission converters and plasma diod es, the only forces inducing plasma flows are due to the temperature s tresses on ions. These flows are similar to the plasma ''residual'' ro tations in tokamaks. However, they are connected with the perpendicula r viscosity dependence of the ion heat fluxes, contrary to tokamaks wh ere parallel viscosity plays the main role. Dust contamination of thes e devices can induce temperature-gradient driven flows of ions, which also entrain neutrals in a multi-component partially ionized plasma. ( C) 1998 Elsevier Science B.V.