Experimental research of 2 MV laser triggered gas switch

The paper presents the experimental investigation of laser triggered gas switch on Qiangguang-Ⅰ accelerator. In the experiments, the laser was transmitted along the axes of the water line through the diode. The results of self-breakdown experiments and trigger experiments are presented and analyzed. At the undervoltage ratio of 88.3%, the average delay of the laser triggered gas switch is 34.2 ns, and the time jitter is less than 3.86 ns, when the maximal operating voltage is 2 MV and the maximal current is over 600 kA. The problems occurring during experiments are summarized and analyzed, and corresponding improvement measures are proposed.