等离子体喷射触发气体开关多通道放电特性

摘要

为了能够形成稳定的多通道放电,研制了一种等离子体喷射触发气体开关。在触发电极的内部嵌入多个微型激励腔以形成多通道等离子体喷射,从而在主间隙中诱导多通道放电。研究了触发电路连接方式、触发能量和极性对多通道等离子体喷射的影响,比较了开关在两种工作模式下各间隙放电通道数量随工作系数的变化规律。实验结果表明：采用触发电路 II 连接方式,触发电极的多通道放电效果更好；高触发能量、负极性和低气压条件有利于形成多通道等离子体喷射；当开关运行在工作模式Ⅱ,且在较高工作系数时,具有更好的多通道放电特性。%In this paper,a plasma-j et triggered gas switch was designed to form multichannel discharge.Multiple micro-in-centive chambers were embedded in the trigger electrode to form multichannel plasma j et.The influences of trigger circuit,energy and polarity on the multichannel plasma j et were studied.The relationship between discharge channel numbers of every spark gap and working coefficient was also investigated at two working modes.Experimental results show that the multichannel discharge characteristics of trigger electrode are better when the upper plate of the trigger electrode is directly grounded.High trigger ener-gy,negative polarity and low gas pressure are conducive to the formation of multichannel plasma j et.The plasma j et triggering can effectively induce multichannel discharge of gas switch.The discharge channel number increases with the increase of working coefficient.