Surface flashover performance of different laser illumination positions on insulator sample

Insulator surface flashover is one of the bottlenecks restricting the development of pulsed power technology. To obtain a deeper understanding of flashover mechanism, UV illumination was introduced into surface flashover process. The flashover performance of different illumination positions on the insulator sample was studied. The experimental results show that the effect is larger when illumination position is close to the cathode triple junction where the flashover initiates, reflecting that different flashover stages play different roles in the flashover process.