Nanosecond pulsed switch triggered by array microhollow cathode discharge
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摘要: 为了实现在大气压下低触发电压的多通道放电，以阵列微孔阴极结构作为触发装置设计了一种新型纳秒脉冲开关。以激光打孔的双面环氧板为阵列微孔阴极，研究了开关工作系数、微孔阴极放电电流、微孔阴极孔数及微孔阴极孔径对开关触发电压、延迟和抖动时间的影响。实验结果表明：更多的阵列微孔、100 m的微孔孔径能够降低开关的触发电压，同时高开关工作系数、大触发电流、多阵列微孔能够减少开关的延迟和抖动时间。因此，为了获得更高性能的纳秒脉冲开关，除了对开关结构的进一步改善，这几个影响开关性能的因素是设计开关时应主要考虑的。Abstract: Triggered by array microhollow cathode structure， nanosecond pulsed switches can realize multichannel discharge at atmosphere with low trigger voltage. Double sided printed circuit board drilled by means of laser was used as array microhollow cathode， and the influence of switch duty factor， trigger current， the number of microhollow cathode holes and the diameter of the microhollow cathode holes on the trigger voltage and the delay and jitter of the switch is discussed. The results show that more microhollow cathode holes and 100 m diameter of the microhollow cathode hole result in lower trigger voltage， and higher trigger current， larger duty factor of the switch and more microhollow cathode holes result in shorter switch delay time with decreased jitter. In designing nanosecond pulsed switches， switch performance will be improved with more consideration of the factors above.
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