为研究聚龙一号驱动器内部电磁脉冲的形成与传输规律,优化调节其运行状态,获得满足负载设计需求的电流波形,建立了描述驱动器各关键部件充放电过程的全电路数值模拟程序。该程序与负载动力学程序耦合模拟,能够在一定范围内得到与实验结果符合较好的电压和电流波形。在典型的丝阵Z箍缩实验条件下,模拟分析了各段水介质传输线上电磁脉冲宽度逐级压缩,功率逐级放大的过程,驱动器充压65 kV时,大约1 MJ的电磁能量传输到绝缘堆位置。在典型的磁驱动准等熵压缩实验条件下,模拟分析了激光触发气体开关对驱动器24路模块分时放电的控制过程,模拟的0121发实验负载区电流上升时间(0~100%)为450 ns、峰值约6 MA。

In order to study the electromagnetic pulse forming and transmission in the PTS facility, and to optimize the performance to get the desired driving currents for the load design, a full circuit model were founded to describe the charging and discharging process for all the key circuit elements in detail. The model and parameters were validated and the numerical results coincided with the experimental results. For typical Z pinch loads, the compression of the pulse and the amplification of the pulse power were simulated, as charged at a voltage of 65 kV, the PTS facility delivered about 1 MJ energy to the stack region. For typical isentropic compression experiments, the timing of the laser triggered gas switch was designed for different loads, and the tailored currents with about 6 MA in peak and 450 ns(0-100%) in rise time were obtained in the load region from simulation for shot 0121.