针对触发脉冲幅值、气体压强和紫外光照射3个因素对多间隙气体开关触发特性的影响规律开展实验研究。实验结果表明:触发电压由50 kV提高到70 kV时，开关触发时延的抖动降低约40%，统计时延的抖动降低约44%，形成时延的抖动变化不大。触发电压继续升高，触发抖动降低的趋势明显减缓。开关工作气压由0.16 MPa提高到0.28 MPa，开关触发时延的抖动增大约1.6倍，统计时延和形成时延的抖动均显著增大。紫外光辐照时间增长，开关触发抖动显著减小，最佳的辐照时间为80~140 ns，开关触发时延的抖动降低约39%。紫外光辐照可以有效降低开关统计时延的抖动，对形成时延影响不大。

Factors affecting the triggering breakdown characteristics of a multi-gap gas switch have been investigated in this paper. Experiments were carried out to study the relationship between the trigger jitter and various switch parameters, e.g. the trigger voltage, the switch pressure and the ultraviolet (UV) pre-ionizing duration. Results indicate that the trigger jitter decreases evidently with the trigger voltage changing from 50 kV to 80 kV, and the statistical delay jitter decreases more evidently than the formative delay jitter. Both the statistical delay jitter and the formative delay jitter increase with the gas pressure changing from 0.16 MPa to 0.28 MPa. The trigger jitter and the formative delay jitter also decrease when the duration of the UV pre-ionizing is prolonged. The optimized duration of UV pre-ionizing is 80-140 ns and the trigger jitter decreases by about 39%. The UV pre-ionizion could effectively reduce the statistical delay jitter, but has little effect on the formation of delay.