Simulation of magnetically switched compression discharge circuits for pulsed gas lasers
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摘要: 为了降低用于脉冲气体激光器的全固态磁压缩放电电路的放电延时抖动,采用PSPICE软件对全固态磁压缩激励电路进行仿真分析,完成了对充电、磁开关复位以及整个放电过程的初步模拟。模拟结果显示,初始储能电容电压1V的波动会引起放电时间5ns~10ns的抖动,抖动时间随着充电电压的升高而降低;通过采用特制的两级耦合复位回路来降低放电延时抖动,该复位电路可将放电抖动从微秒量级降低到纳秒量级。结果表明,降低抖动的关键因素在于充电过程中高频交流纹波经复位电路耦合将磁芯复位到一稳定状态,使磁开关、可饱和脉冲变压器的工作状态更加稳定。建立的仿真模型,对低放电抖动的脉冲放电激励电路设计可提供参考。Abstract: In order to reduce discharge delay jitter of all solid state magnetic pulse compression discharge circuit for pulsed gas laser, the circuit was simulated with the pspice software including the full process of charging, magnetic switch resetting and discharging. The simulation results show that 1V jitter of initial storage capacitor voltage causes 5ns~10ns jitter of discharge time and the discharge jitter decreases with the increase of the charging voltage. It was found in experiments that the discharge jitter can be reduced from s level to ns level by applying a special two-stage coupled resetting circuit. The results show that the key to reduce the jitter is that the magnetic cores can be reset to a steady state with high frequency alternating current (AC) ripple in the process of charging through the resetting circuit so that the magnetic switches and saturable transformer can work more steady. The simulation model can provide a reference to the design of low jitter pulsed discharge circuits.
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Keywords:
- laser technique /
- pulsed discharge /
- magnetic switch /
- discharge jitter /
- PSPICE simulation
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