基于感应腔支路和角向线LTD新型触发技术

A Novel Triggering Technique Based on an Internal Brick and Azimuthal Line in Cavities for Linear Transformer Drivers

提出一种利用感应腔1个支路和角向传输线实现直线型变压器驱动源(linear transformer driver,LTD)开关同步触发闭合的新方法,触发支路与LTD感应腔其他支路具有相同工作电压和气压,触发支路不包围磁芯.当触发支路开关被外施1路脉冲触发闭合后,产生快前沿高电压脉冲并沿角向线传输,触发感应腔其他支路开关.该触发方式在20支路并联500kA LTD感应腔和34支路并联0.1Hz重频800kA LTD感应腔上证明可行.基于该触发方式感应腔,又给出了从上游感应腔触发支路引出脉冲触发下游相应位置感应腔的次级为水介质传输线多级串联LTD驱动源的同步触发方法,可显著降低Z箍缩驱动源的外触发脉冲数量.

In this paper,a novel triggering technique based on an internal brick and azimuthal line in cavities is presented for LTDs.The triggered brick,which is similar to other bricks in cavities,has the same charge voltage and the switch gas pressure,but does not enclose magnetic cores.When the switch in the brick is triggered by an external pulse,a high voltage pulse is produced and transmitted to trigger the switches in other bricks.Therefore,only one external trigger pulse is necessary for a 1 MA LTD cavity.This novel triggering technique for a cavity has been verified in 500 kA LTD cavity with 20 bricks and 800 kA cavities with34 bricks.Based on this novel triggering technique,only several upstream cavities are triggered by external trigger pulses,the other cavities are triggered by the high pulses from the triggering brick in the particularly located upstream cavities with multi-stage cavities stackedin series for LTDs with water-insulated transmission line.The novel triggering technique can reduce the number of external triggering pulses of Z-pinch LTD pulser remarkablely.