20 MA/300 ns Marx型直接驱动Z箍缩脉冲源

基于金属外壳1.0 F/40 nH/100 kV的电容器和100 kV/200 kA气体开关，提出了电流20 MA、前沿300 ns Marx型直接驱动Z箍缩负载的脉冲功率源概念设想，共40路并联，每路为6个Marx并联驱动一条水介质传输线， Marx为18级串联。分析了关键单元（电容器和气体开关）的技术可行性，建立了PSpice电路模型，模拟计算了Marx建立时间分散性、水介质传输线阻抗对负载电流的影响，模拟结果表明:Marx建立时间分散性从10 ns增加到60 ns时，负载电流前沿从平均282 ns增加到287 ns，峰值从21.0 MA降低到19.8 MA，脉宽几乎不变；Marx建立时间分散性对负载电流的影响随着并联数目增加变小；采用4.2 等阻抗传输线，负载电流最大。

20 MA/300 ns direct-driven Z-pinch Marx-based pulsed power driver

The conceptional design of a 20 MA/300 ns direct-driven Z-pinch pulsed power driver based on Marx generators is presented, whose Marx generators are composed of 18 series stages with 1.0 μF/40 nH/100 kV metal shell capacitors and ±100 kV/200 kA gas switches. It has 40 modules in parallel, each consisting of six Marx generators driving the water transmission line. The circuit scheme of the pulsed power driver is set up through PSpice, and the influences of Marx erection jitter on load current are simulated. The results show that when the Marx erection jitter increases from 10 to 60 ns, the peak current varies from 21.0 to 19.8 MA, the rise time of load current is from 282 to 289 ns, while the full width at half magnitude of load current is constant. The effects of the Marx erection jitter on load current declines with the number of Marx generators in parallel increasing. The load current is of maximum when the water line impedance is 4.2 Ω.