根据Trigatron的触发要求设计了脉冲变压器型驱动源、三电极气体开关.在多种驱动模式下对三电极开关的自陡化参数进行统计分析,选择最优的自陡化工作模式.通过研究自陡化工作模式,优化了三电极开关工作极性、工作电场、紫外辐照强度和辐照时间.试验结果表明:增加陡化环节后,Trigatron的击穿概率有了明显提高,击穿时刻延迟和抖动明显降低,扩大了Trigatron稳定工作的欠压比范围.%A tri-elect rode self-stepening switch was researched, Then a triggering system was descried with a transformer driver and the self- steepenting switch to satisfy the requiremenis of the trigatron. Statistical analysis on steepening parameters of the switch was conducted under multiple driving modes to reach the optimized self-steepening mode. The optimization combination of switching polarity, working electric field, UV radiation intensity and time were determined. The switching possibility of the irigatron was obviously improved when the self-Steepening segment was inserted. Meanwhile, the delay and the jiiter of the triga-tron decreased significantly, and its working voltage ratio range was broadened.
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