Magnetic Pumping Effect on Dielectric Recovery of Blown SF6 ARCS

Experimental measurements of the dielectric recovery rate of blown SF6 arc channels in a nozzle, following the interruption of 400 sμec duration square current pulses of amplitudes between 20 A and 1000 A, have been made; the electrode spacing was 1 cm, and the upstream arc chamber pressure was either 35 psia or 60 psia.