| 4层圆盘锥形磁绝缘传输线的电流测量 |
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| 引用本文： | 卫兵, 卿燕玲, 丰树平, 等. 4层圆盘锥形磁绝缘传输线的电流测量[J]. 强激光与粒子束, 2014, 26: 085002. doi: 10.11884/HPLPB201426.085002 |
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| 作者姓名： | 卫兵 卿燕玲 丰树平 计策 夏明鹤 傅贞 李勇 任济 宋盛义 王勐 |
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| 作者单位： | 1.中国工程物理研究院 流体物理研究所, 脉冲功率科学与技术重点实验室, 四川 绵阳 621 999 |
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| 摘 要： | 为获取PTS装置磁绝缘传输线的电流，设计、标定了微分环。探头使用镍铬合金膜屏蔽空间电子，采用在线标定。设计相应的馈入结构从负载区分别对不同层磁绝缘传输线馈入信号，在每个三平板传输线出口的板堆过渡区位置安装短路杆，能够在磁绝缘传输线上得到基本均匀的电流，实现电流探头的逐层标定。频响分析表明金属膜屏蔽效应导致探头的高频特性变差。实验表明，贴膜的探头频响上限为50.3 MHz，满足被测信号的要求。实测PTS装置磁绝缘传输线电流与负载区电流的测量结果自洽，且各层电流与总电流等结果符合理论预计。
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| 关 键 词： | 磁绝缘传输线 脉冲电流 频率响应 |
| 收稿时间： | 2013-10-06 |
| 修稿时间： | 2014-03-13 |
Current measurement for four-level magnetically-insulated transmission line |
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| Wei Bing, Qing Yanling, Feng Shuping, et al. Current measurement for four-level magnetically-insulated transmission line[J]. High Power Laser and Particle Beams, 2014, 26: 085002. doi: 10.11884/HPLPB201426.085002 |
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| Authors: | Wei Bing Qing Yanling Feng Shuping Ji Ce Xia Minghe Fu Zhen Li Yong Ren Ji Song Shengyi Wang Meng |
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| Affiliation: | 1. Key Laboratory of Pulsed Power,Institute of Fluid Physics,CAEP,P.O.Box 919-108,Mianyan 621999,China |
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| Abstract: | Differential-output current loops (B-dot probes) were designed and calibrated to derive magnetically-insulated transmission line(MITL) current in the PTS facility. Nichrome films were used to shield the loops from sheath electrons. All the B-dots were calibrated insitu. A feeding structure was designed to drive the MITLs from load area. In order to realize uniform current distribution azimuthally, MITL was terminated with short-circuit rods at the end of the corresponding tri-plate water line. Then the B-dots at each level could be calibrated respectively. Frequency response analysis indicates that the using of nichrome film makes the high frequency characteristics worse for B-dots. It shows in experiments that B-dots upper limiting frequency is 50.3 MHz, which is satisfactory for current measurement in our experiments. It also shows that MITL current and load current are self-consistent. Current of each level and combined current of all levels are reasonable according to theoretical predictions. |
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| Keywords: | magnetically-insulated transmission line current pulse frequency response |
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