Operational characteristics of gas switch with coaxial cylindrical electrodes and distortion field

In practice, the working properties of the 120 gas switches, which play an important role in the operation of LTD on Qiangguang I accelerator, vary with the number of discharges. With the accumulated shots of accelerator, the gas switches in LTD roughly pass through three different phases: initial phase, middle and post phase and erratic phase. The static characteristics acquired by experiments show that the switch in erratic phase with over 300 shots has discharging jitter about 20 to 33 percent. For the switch in middle and post phase with more than 100 shots, by analyzing the constant voltage data of static discharging of the switch of 0.08 MPa, the self-discharging probability is respectively presented with Gauss and Weibull distribution model; Further more, for 42 kV operation voltage of all 120 switches in LTD and the gas pressure of 0.19 MPa, the probability of no misfire incidents is not less than 90%, and the corresponding dynamic discharging delay and jitter time of the switch is about 170 ns and 20 ns, respectively.