单线串联形成三脉冲实验研究

Serial PFL to form 3-pulse

介绍了单传输线型高压脉冲形成线的基本原理,将三套单线通过高性能开关串联即可形成所需的三脉冲。实验中,采用一台300kVMarx发生器作为三套单线系统的高压源,形成线与传输线均为同轴电缆,开关为同轴场畸变型开关,负载为硫酸铜水电阻。得到的三脉冲前沿约20ns,间隔约为300ns,脉宽约120ns。由于Marx发生器输出信号的触发时刻不同,导致脉冲幅度有较大的差异,对此提出改善实验结果的设想:加大Marx对形成线的充电电感以减小三脉冲基线的偏移;设计并试验新的V/N型开关,提高开关的加工精度;各脉冲形成线配有各自独立的Marx充电系统以使各脉冲单独可调。

Single transmission line theory was introduced. Three PFLs were serially triggered to form a 3-pulse and a sequence of 3-pulse was produced along the same time axis. In the experiment, a 300 kV Marx generator was used to supply high voltage for 3 PFL, a coaxial switch was used, and the load was CuSO4 liquid resistance. A 3-pulse waveform was produced. The rising time was about 20 ns, the distance between two pulses about 300 ns and the pulse width about 120 ns. There were obvious differences in the amplitude among the 3-pulses, since Marx output were not triggered in the same time. Finally some projects for improving the waveform were introduced.