Investigation of the redistribution of the current in a nanosecond volume discharge after the appearance of a cathode spot
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An investigation was made of the process of contraction of a nanosecond volume discharge in air with a homogeneous field distribution and a current density 500 A/cm2 when the gap was 0.7 cm and the pressure 76 torr. It was found that the appearance of a cathode spot in this volume discharge resulted in an effective contraction of the current into a spot and formation of a diffuse channel. A high-conductivity channel emerging from the cathode spot appeared when the current density in the diffusion channel above this spot reached (1–3)·105 A/cm2.
KeywordsField Distribution Volume Discharge Cathode Spot Homogeneous Field Diffuse Channel
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