Experimental studies of the influence of high magnetic fields on the electrical explosion of wires in vacuum

Abstract

Summary form only given, as follows. The influence of the axial field on the electrical explosion of wires was studied under the conditions when the dominating mechanism of the conductor destruction is the stability loss. The induction amplitude reached 0.8 MGs which fairly exceeds the theoretical stabilization threshold of the zero mode for the experiment conditions. The explosion of the wire of 0.2 mm diameter was performed in the consumable vacuumized glass vessels situated in the cavity of the single-turn solenoid. Sublimation energy is reached near to the peak conductor current. Current rise time up to the amplitude (1 /spl mu/s) is substantially less then the axial field rise time (7 /spl mu/s). The current switching on was effected near the induction maximum. The measurements have shown that the conductivity dependence on the time and energy supplied are substantially affected by the induction amplitude. The explosion is stabilized if the axial field induction is several times higher than the said threshold value. The stabilization is indicated by the coincidence of the energy dependence of the supplied energy with the calculated one obtained on the one-dimensional model. The substantial influence of the axial field on the sediment structure on the chamber wall after the explosion is noted.