同轴型磁绝缘传输线电流损失特性实验研究  

Experimental studies of current-loss characteristics for coaxial magnetically-insulated-transmission line

作　　者：呼义翔[1] 黄涛[1] 曾正中[1] 韩娟娟[1] 曾江涛[1] 丛培天[1] 雷天时[1] 

机构地区：[1]西北核技术研究所强脉冲辐射环境模拟与效应国家重点实验室,西安710024

出　　处：《强激光与粒子束》2013年第5期1298-1302,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(50637010;51077111)

摘　　要：基于"强光一号"装置设计了1m长、2cm阴阳极间隙的同轴型磁绝缘传输线(MITL)实验平台,实验研究了负载阻值0,2.07,4.12和5.68Ω条件下该MITL沿线电流损失特性。实验结果显示:满足磁绝缘准则条件下,该MITL沿线电流损失主要发生在阻抗剧变区域;2.07Ω负载阻值条件下,传输于阴阳极间隙的真空电子流可达传输线电流的17.4%,并且其比例随着负载阻值的增大而不断增大。基于空间电子流理论,对上述实验现象进行了定性的机理分析与解释。A test stand of one-meter long coaxial magnetically insulated-transmission line （MITL） with 2 cm anode-cathode gap was designed and constructed based on the Qiangguang- I ＂ facility. Current-loss characteristics of MITL with the load resistance of 0, 2.07, 4.12 and 5.68 Ωwere experimentally studied. Experimental results show that current loss along the MITL which fits in with the principle of magnetic insulation mainly occurred in the areas with abrupt change of geometrical impedance. And it is also shown that with the load resistance of 2.07Ω, the ratio of the vacuum electron flow between anode and cathode gap to the transmission line current is close to 17.4%, and it increases gradually with the enhancement of the load resistance. Finally, based on theories of the space-charge flow, the experimental phenomena mentioned above were qualitatively analyzed and dis- cussed.

关 键 词：磁绝缘传输线 电流损失 真空电子流 几何阻抗 

分 类 号：TM835.4[电气工程—高电压与绝缘技术]