磁绝缘传输线电压的初步测量

针对快脉冲直线变压器驱动源装置上的真空磁绝缘传输线(MITL)电压测量的需求，开展了微分型电容分压器和电感分压器的设计、标定和实验。通过不同的电压值、负载阻抗的装置实验中探头输出结果的分析和比较，讨论了测量方法的可行性和适用范围。实验结果表明：微分型电容分压器能够应用于完全磁绝缘状态下的MITL电压测量，但容易受阴极电子发射的影响导致探头输出波形发生畸变。电感分压器受分布电容和电感的影响导致输出信号存在寄生振荡，采用波形重建的方法初步获得了合理的测量结果。

Abstract

The differential capacitive voltage divider and inductive voltage divider were designed for voltage measurement of magnetically-insulated transmission line (MITL) on a 10-stage fast linear transformer driver (LTD) system. The dividers were calibrated in-situ with a 12 kV pulser. The voltage of MITL was measured with the two voltage dividers. The experimental results show that, the differential capacitive voltage divider signal is susceptible to MITL sheath electrons. But when the electrons are highly insulated, the capacitive divider signal could reflect the history of MITL voltage. There is oscillation in the waveform of inductive divider, which is believed to be resulted from the parasitic capacitance and inductance according to circuit simulations. However, the real voltage waveform could be reconstructed with post-processing according to frequency response analysis.

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卫兵, 付佳斌, 卿燕玲, 章乐, 邹文康, 陈林, 丰树平, 王勐. 磁绝缘传输线电压的初步测量[J]. 强激光与粒子束, 2013, 25(10): 2757. Wei Bing, Fu Jiabin, Qing Yanling, Zhang Le, Zou Wenkang, Chen Lin, Feng Shuping, Wang Meng. Preliminary measurement of high voltage pulse of magnetically-insulated transmission line[J]. High Power Laser and Particle Beams, 2013, 25(10): 2757.

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