基于雪崩管Marx电路的高稳定度脉冲技术

Research on high-stability pulser based on avalanche transistor Marx circuit

采用Marx电路提高雪崩管脉冲源输出脉冲幅度,分析基于雪崩管Marx电路脉冲源的时基稳定度和波形稳定度的影响因素。采用适当的优化措施提高稳定度指标,设计了高稳定度的雪崩管脉冲源,脉冲峰值电压2 000 V(50Ω负载),脉冲全底宽度5 ns,上升时间400 ps,重复频率达到25 kHz,具有很高的稳定度指标:短时抖动小于30 ps,长时漂移小于100 ps/min,峰值电压和脉冲宽度抖动小于1%。

The merits of the full-solid-state pulser,based on avalanche transistor,are high stability,narrow pulse and short rise-time.But the disadvantage of this pulser is that its output power is low,thus Marx circuit is used to improve the peak-voltage.In this paper,the effect factors of the time-stability and shape-stability are analyzed,some optimizing measures are used to improve the stability,and a high-stability pulser is designed.The pulser＇s peak voltage is 2 000 V,pulse width is 5 ns,repetition frequency is higher than 25 kHz,and the pulse width jitter is less than 1% and the peak voltage jitter is less than 1%.