全固态模块化MARX电路及脉冲同步叠加设计

Design of all-solid-state modularized Marx circuit and synchronous combining of pulses

选用雪崩三极管作为开关器件，详细讨论了设计和优化Marx电路的方法；将Marx电路进行模块化改进，设计了一种新型四路同步叠加立体结构，并得出了叠加倍数与模块数量的理论关系式。最终，利用＋300V直流电源供电，通过四路输出幅值为2．6kV的Marx模块叠加，在50Ω阻性负载上得到了幅值-5.0kV、半高脉宽5．3ns、脉冲能量约2．0mJ的高斯型脉冲，时延抖动小于100Ps，重复频率达10kHz，叠加效率达96．2％。调节直流偏置电压为200～300V，并配合模块数量的增减，可调节脉冲幅值为1．6～5．0kV。

In this paper,utilizing avalanche transistors as switching devices,the methods of designing and optimizing Marx circuit were discussed in detail.Modular improvement was implemented to the Marx circuit and a novel stereo structure of synchronous four-module combining was designed.The theoretical relation of the combining ratio and the combined modules were derived.Using a+300VDC power and combining four-2.6kV Marx modules,Gaussian pulses were obtained on a 50Ωresistive load with-5.0kV magnitude,5.3ns half peak width,2.0mJ single-pulse energy.It was realized to stably work under a repetitive frequency of 10 kHz and the time delay jitter was measured less than 100 ps.The four-module combining efficiency was calculated up to 96.2 %.If changing the DC bias voltage between 200 Vand 300Vand varying the number of combined modules,the final output magnitude would be regulated from 1.6kV to 5.0kV.