Vacuum surface flashover characteristics of cross-linked polystyrene under high repetition rate burst multi-pulse loading
-
摘要: 基于高重复频率强流多脉冲加速器的应用需求，针对交联聚苯乙烯（XLPS）材料在猝发多脉冲下的真空沿面闪络特性开展了实验研究。采用放置于平板电极中的XLPS圆台样品，在脉宽120 ns的单个脉冲和间隔500 ns的三脉冲加载下开展了真空沿面闪络实验，通过对实验平台和实验规范的优化设计，有效提升了实验效率和数据有效性，观测到了样品发生真空沿面闪络前的试样电压顶降现象和前序脉冲闪络对后续脉冲的显著影响，获得了XLPS材料在相应条件下真空沿面闪络的统计数据。在实验基础上，对XLPS材料在高重复频率多脉冲加载下的真空沿面闪络特性进行了分析，为高重复频率多脉冲加速器的绝缘设计提供了实验依据。Abstract: Based on the requirement of high current multi-pulse accelerator, the surface flashover characteristics of cross-linked polystyrene (XLPS) material under burst multi-pulse in vacuum were studied experimentally. Vacuum surface flashover experiments were carried out with XLPS samples placed in flat electrodes under single pulse and three pulses with interval of 500 ns. Special phenomena such as continuous decrease of equivalent impedance of vacuum surface before flashover and continuous maintenance of flashover channel after pulse end were observed, and statistical data of vacuum surface flashover of XLPS materials under corresponding conditions were obtained. On the basis of experiments, the flashover characteristics of XLPS in vacuum under high repetition rate multi-pulse loading are analyzed, which provides experimental basis for insulation design of high repetition rate multi-pulse accelerator.
-
图 1 三脉冲真空沿面闪络实验布局图
Figure 1. Experimental layout of triple-pulse vacuum surface flashover
图 4 单脉冲下不同厚度XLPS的真空沿面闪络电压和电场
Figure 4. Vacuum flashover voltage and electric strength of XLPS with different thickness under single pulse
图 5 单脉冲和三脉冲加载下的XLPS真空沿面闪络电压
Figure 5. Vacuum flashover voltages of XLPS under single pulse and triple pulse loading
-
[1] Wetzer J M. Vacuum insulator flashover mechanisms, diagnos-tics and design implications[J]. IEEE Trans on Dielectr and Electr Insul, 1997, 4(4): 349-357. doi: 10.1109/94.625347 [2] Sivathanu A, Hackam R. Surface flashover of solid insulators in atmospheric air and in vacuum[J]. J Appl Phys, 1985, 58(1): 146-153. doi: 10.1063/1.335700 [3] Wang Shaoheng, Deng Jianjun. Acceleration modules in linear induction accelerators[J]. Chinese Physics C, 2014, 38(5): 057005. doi: 10.1088/1674-1137/38/5/057005 [4] Deng Jianjun. The Dragon-II, a triple-pulse high power linear induction accelerator [C]//The 5th Euro-Asian Pulsed Power Conference, 2014. [5] 何佳龙, 彭宇飞, 陈思富, 等. 多脉冲加载下材料的绝缘特性[J]. 强激光与粒子束, 2010, 22(4):927-930 doi: 10.3788/HPLPB20102204.0927He Jialong, Peng Yufei, Chen Sifu, et al. Characteristic of insulation material under multiple pulses[J]. High Power Laser and Particle Beams, 2010, 22(4): 927-930 doi: 10.3788/HPLPB20102204.0927 [6] 张冠军, 赵文彬, 郑楠, 等. 真空中固体绝缘沿面闪络现象的研究进展[J]. 高电压技术, 2007, 33(7):30-35Zhang Guanjun, Zhao Wenbin, Zheng Nan, et al. Research progress on surface flashover phenomena across solid insulation in vacuum[J]. High Voltage Engineering, 2007, 33(7): 30-35 [7] 高巍, 孙广生, 严萍, 等. 纳秒脉冲下真空绝缘沿面闪络特性实验研究[J]. 高电压技术, 2006, 32(4):58-61Gao Wei, Sun Guangsheng, Yan Ping, et al. Investigation of flashover characteristics under nanosecond pulse in vacuum[J]. High Voltage Engineering, 2006, 32(4): 58-61 [8] 汤俊萍, 杨莉, 邱爱慈, 等. 纳米脉冲电压下真空沿面闪络的过程分析[J]. 试样与研究, 2008, 31(2):30-36Tang Junping, Yang Li, Qiu Aici, et al. Exploration of surface flashover process in vacuum under nanosecond pulses[J]. Experiment and Research, 2008, 31(2): 30-36 [9] Tang Junping, Qiu Aici, Yang Li, et al. Process of surface flashover in vacuum under nanosecond pulse[J]. IEEE Transactions on Plasma Science, 2010, 38(1): 53-58. doi: 10.1109/TPS.2009.2035127 [10] Xu Yao, Liu Zhigang, Zou Xiaobing, et al. Two modes of vacuum flashover process under pulsed voltage[J]. Physics of Plasmas, 2022, 29: 113901. doi: 10.1063/5.0111150 [11] Li Shengtao. Improvement of surface flashover in vacuum[J]. High Voltage, 2020, 5(2): 122-133. doi: 10.1049/hve.2020.0021 [12] Yu Kaikun, Zhang Guanjun, Liu Guoqing, et al. Effect of surface shallow traps on flashover characteristics across machinable ceramic in vacuum[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2008, 15(5): 1464-1470. doi: 10.1109/TDEI.2008.4656257 [13] Li Shengtao, Huang Qifeng, Sun Jian, et al. Effect of traps on surface flashover of XLPE in vacuum[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2010, 17(3): 964-970. doi: 10.1109/TDEI.2010.5492273 [14] Li Shengtao, Wang Weiwang, Yu Shihu, et al. Degradation of cross linked polystyrene by repetitive impulse surface flashovers in vacuum[J]. IEEE Transactions on Dielectrics and Electrical Insulation, 2013, 20(5): 1934-1941. doi: 10.1109/TDEI.2013.6633727 [15] Anderson R A, Brainard J P. Mechanism of pulsed surface flashover involving electron-stimulated desorption[J]. J Appl Phys, 1980, 51(3): 1414-1421. doi: 10.1063/1.327839 [16] Guo Baohong, Sun Guangyu, Zhang Shu, et al. Mechanism of vacuum flashover on surface roughness[J]. Journal of Physics D: Applied Physics, 2019, 52: 215301. doi: 10.1088/1361-6463/ab05a0 -
下载:
点击查看大图
图(10)
计量
- 文章访问数: 49
- HTML全文浏览量: 36
- PDF下载量: 20
- 被引次数: 0
