Nanosecond Electrical Discharge Development in SF₆-N₂ Gas Mixtures

Abstract

Both an experimental observation and a numerical modeling of streamer development in SF₆-N₂ gas mixtures are performed and the results are compared with each other. By using a steep-front square high voltage in the measurements, it is possible to keep the constant condition of the electric field during the streamer development. Minimum sparkover voltage and streamer velocities obtained from the numerical modeling show good agreement with those from the experimental observation, and the change in the streamer velocity against the gas mixture ratio shows a similar tendency.