Abstract

Investigation of pulsed electrical breakdown in conductive water has shown that at conductivity of 90 S cm−1 four different modes of breakdown are possible in the range of applied voltage from 9 to 27 kV in 1 cm gap with pin anode. At breakdown voltage of 9 kV, slow ‘thermal’ breakdown with the average speed of plasma channel propagation of 5 m s−1 takes place, while at the maximum studied voltage of 27 kV, fast ‘streamer-leader’ breakdown with the channel speed increased by three orders of magnitude (up to 7 km s−1) develops.

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