亚纳秒气体开关工作特性

 设计了3种结构的同轴Peaking-Chopping组合型亚纳秒气体开关，以半导体开路开关脉冲源为实验平台，分别对它们的击穿特性进行了实验研究。结果表明：亚纳秒气体开关采用环形组合电极Ⅱ时，可以在1～500 Hz稳定工作，输出前沿400 ps、后沿320 ps、脉冲宽度460 ps和电压129.2 kV的脉冲。开关输出脉冲的前后沿、脉冲宽度和电压幅度与开关间隙、气压和重复频率等因素有关，亚纳秒气体开关在小间隙（1～2 mm）、高气压（约10 MPa）时具有良好的重频特性。在开关气压和输入脉冲幅度不变时，输入脉冲上升沿越快，开关的击穿时延越小，击穿电压越高。

Operating characteristics of subnanosecond gas switch

Three coaxial peaking-chopping subnanosecond gas switches were designed,including two ring-ring electrodes and a sphere-ring electrode. Experimental researches on their operating characteristics were performed on a semiconductor opening switch-based pulse source respectively. Results show that the switch can work steadily at 1～500 Hz repetition rate, and can output a pulse with 400 ps rise time, 320 ps fall time, 460 ps width and 129.2 kV peak voltage, as the switch adopts the ring-ring electrodeⅡ. It is also revealed that gap size, gap pressure and repetition rate of the switches all have great effects on rise time, fall time, voltage range and repetition rate of output pulses. The subnanosecond gas switch has excellent operating characteristics when it operates at small gap (1～2 mm)