Selection of gas spark gaps electrode material under microsecond 100kA current pulse

Surface layer temperature distribution of electrode was analyzed based on the equation of heat conduction. The parameters of arc and electrode material that influence the temperature distribution were obtained. The electrode erosion experiment of brass, stainless steel, coppertungsten and graphite was carried out under 100kA microsecond arc for 300 pulses and 36 C charge transfer. The experimental results show that the mass loss rate of the four electrodes materials is 6.39mg/C for brass, 6-38mg/C for stainless steel, 4.19 mg/C for coppertungsten and 1.19mg/C for graphite respectively．