Stability of breakdown phenomenon in N₂, SF_6, and their mixture under impulse voltages

In the self-breakdown experiment, it is demonstrated that breakdown stability of 15% SF6/N2 was higher than pure SF6 and N2 in non-uniform field under negative impulse voltages. this paper, stable phenomenon gas mixture studied at nanosecond scale. The corona process streamer these three gases are investigated by using a high-speed framing camera. stabilized abnormal phenomena observed discharge have relation to phenomenon. supposed be main reason obstructs development steamer stabilizes supply photons anode. Furthermore, captured images show there ion sheath between electrodes. keeps near cathode tip. addition, emitted can ionize neutral particles generated photoelectrons positive ions accumulate anode surface. occurs once accumulation number reaches certain value. photon emission intensity also an influence on streamer.