辉光放电触发赝火花开关的时延及抖动特性

Delay and jitter of pseudospark switch triggered by glow discharge

设计了一种辉光放电触发赝火花开关,对其时延和抖动特性进行系统研究。研究了开关时延、抖动与辉光放电电流、气压、触发电压及阳极电压的关系。当辉光放电电流小于0.30 mA时,开关无法触发导通;当电流为0.35～0.60 mA时,随辉光放电电流的增大,开关时延、抖动减小;当辉光放电电流为0.60 mA时,开关时延、抖动基本不变,出现饱和。当氦气气压低于6 Pa,开关难以触通,与理论计算值6.95 Pa吻合;当氦气气压为6～12 Pa时,开关的时延、抖动随气压的升高而减小;气压为12～30 Pa时,开关工作在比较稳定的状态。当触发电压小于3 kV,开关难以触通;随着触发电压的增大,开关时延、抖动减小;当触发电压大于5.3kV,开关时延、抖动基本保持不变。开关在稳定工作条件下,阳极电压在8～25 kV范围内变化时;开关时延基本不变。

A type of glow discharge triggered pseudospark switch is designed,and the relationship among the delay and jitter of the switch and the glow discharge current,gas pressure,trigger voltage and anode voltage is studied.When the glow discharge current is less than 0.30 mA,the switch can not be triggered;when the current increases from 0.35 mA to 0.6 mA,the delay and jitter decrease;when the current is about 0.60 mA,the delay and jitter are stable.When the He pressure is lower than 6 Pa,the switch can not be triggered,which is consistent with the theoretic value 6.95 Pa;when the He pressure is between 6 Pa and 12 Pa,the delay and jitter lessen as the gas pressure increases;the switch can work in a stable state when the gas pressure is more than 12 Pa and less than 30 Pa.When the gas pressure is 12 Pa,if the trigger voltage is less than 3 kV,the switch is difficult to be triggered;the delay and jitter minish as the trigger voltage increases,and achieve stable states when the trigger voltage is more than 5.3 kV.When the He pressure is 12 Pa,the glow discharge current is up to 0.70 mA and the trigger voltage equals 5.8 kV,the delay of the switch is approximately constant for anode voltage from 8 kV to 25 kV.