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Evaluation of liquid-metal jets as the conductor in a rep-rated, exploding-fuse opening switch

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2 Author(s)
Ansley, W.E. ; Dept. of Electr. Eng., Auburn Univ., AL, USA ; Rose, M.F.

A repetitive, high-power opening switch technique for use in pulsed power applications using inductive energy storage is presented, along with data which demonstrate performance characteristics. This technique uses jets of a liquid conductor to replace the solid metal fuses in exploding-fuse opening-switch designs. High-power switching characteristics such as interrupt current, holdoff voltage, and resistance change are presented, along with information on how these characteristics change as jet length and circuit parameters are varied. A simulated load is used to demonstrate that exploding liquid-metal jets are feasible replacements for solid-fuse conductors in realistic applications. Likewise, the switching facility has been rep-rated in a two-pulse scenario to show its primary advantage over solid-fuse switches. The use of a high-speed camera to monitor the expansion of the mercury column upon vaporization is also described. Radial expansion velocities have been extracted from the images and are correlated with the electrical data

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Magnetics, IEEE Transactions on  (Volume:32 ,  Issue: 3 )