高压氮气亚纳秒开关放电特性实验研究
Experimental study on discharge characteristics of a subnanosecond high pressure N2 switch
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摘要: 利用幅值约220 kV、脉宽约4 ns的高压纳秒脉冲源，对高压氮气亚纳秒气体开关放电特性进行了实验研究。实验结果表明：当气压在3~10 MPa间变化，间隔距离在0.6~1.2 mm间变化时，氮气间隙击穿电压随气压和间隙距离的增大而增大，并随气压的增大略呈饱和趋势,最高击穿电场约为2 MV/cm。开关输出电压波形的上升时间变化范围为145~190 ps，该上升时间随气压、击穿电场以及间隙距离增大而减小。Abstract: Experimental study on discharge characteristics of high pressure subnanosecond N2 switch was carried out by using a high voltage nanosecond generator in the article. The results show that when N2 pressure ranges from 3 to 10 MPa and gap distance ranges from 0.6 to 1.2 mm, the breakdown voltage of N2 gap increases as N2 pressure and gap distance increases, and saturates as N2 pressure increases. The highest breakdown electric field is about 2 MV/cm. The rise time of the output voltage of the high pressure subnanosecond N2 switch ranges 145~190 ps, and decreases as N2 pressure and gap distance increases.
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Key words:
- subnanosecond /
- gas switch /
- breakdown voltage /
- rise time /
- prepulse
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