100 GW直线变压器驱动源的物理设计与模拟

Physical design and simulation for a 100 GW LTD system

基于已有四开关组直线变压器驱动源(LTD)模块设计了对1Ω负载输出电流100 kA、脉冲上升时间小于60 ns的八开关组LTD模块,该模块采用轮辐式结构,由8个储能电容、气体开关、峰化电容器组并联向中心负载放电。在此基础上,给出了峰值功率100 GW、共10级的LTD装置的物理设计,该装置为同轴感应电压叠加型脉冲发生器。通过电路模拟和PIC模拟,对物理设计进行了检验,结果表明:10级八开关组100 kA LTD模块串联可使10Ω负载获得超过100 GW的功率输出,脉冲上升时间小于60 ns,所选取的结构和参数能保证电子流的磁绝缘,高压脉冲能有效传输到负载。

An eight-switch linear tronsformar driver（LTD） module with 100 kA output capability was designed based on a former four-switch one. The spoke-like eight bricks discharge .in parallel to drive the load in the center. A 10-stage 100 GW LTD system was physically designed with the newly designed modules. Circuit simulation with Pspice and particle-in-cell （PIC） simulation were done to assess the system＇s physical properties. Simulations have proved that the design is reasonable. Voltage was magnetically and inductively added, and the system can drive a 10 Ω load with 100 GW pulse, with rise time of the pulse less than 60 ns.