多间隙轨道式气体开关自击穿特性  

Self-breakdown characteristic of multi-gap rail switch

作　　者：吴撼宇[1] 孙铁平[1] 丛培天[1] 李岩[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10期2772-2776,共5页High Power Laser and Particle Beams

摘　　要：介绍了一种多间隙轨道式气体开关的结构及其自击穿实验研究结果。通过对开关放电的理论分析,并结合实验数据,获得一个适合该开关自击穿工作特性的表达式。研究结果发现,在高气压条件下,开关静态特性曲线与空气击穿的经验式曲线存在较大的差别,并且击穿电压随气压增加并不完全呈线性变化。经过对实验条件和数据的分析,认为在高气压、高电压条件下,电极表面形成的电晕可能是导致该开关静态特性曲线出现此现象的原因。由于开关的特殊结构,电极电晕不仅未起到均压的作用,反而减小了电极之间有效的绝缘距离,从而导致开关自击穿电压实验值与经验理论值的偏离。A multi-gap rail switch is introduced with its configuration and self-breakdown experiments. The streamer theory gives a Raether criterion which is used to estimate if the gap can be broken down. An equation about self-breakdown voltage is ob- tained from the criterion. When the switch has high gas pressure, there is a visible difference between experimental data and em- pirical relation. Breakdown voltage nonlinearly increases with increasing pressure, and by analyzing the experimental condition and data, its reason may be corona from electrode surface. Because of special geometry of the switch, the corona can not only make the electric field uniform but also decrease the distance of A-K gap under high voltage and high gas pressure.

关 键 词：多间隙 轨道式 气体开关 电晕 

分 类 号：TM8[电气工程—高电压与绝缘技术] TN78[电子电信—电路与系统]