The effect of impulse rising steepness on streamer to leader transition in non-uniform field gap in SF6

Abstract

This paper describes the mechanism of discharge development in non-uniform field gap in SF6 under positive impulses with different rising steepness. Based on theoretical consideration, an expression of the transition delay time from streamer to leader is presented, which can help to better understand the process of streamer to leader transition under impulses with different rising steepness in SF6. Also, the calculated results of the proposed expression for the transition delay time are quite in agreement with the experimental ones.