基于LTD技术900kA的Z箍缩驱动器设计

Design of a 900kA LTD accelerator for wire-array Z-pinch experiments

介绍了一种用于丝阵Z箍缩(Z-pinch)内爆实验研究的脉冲放电模块的设计。模块基于直线型变压器驱动器(LTD)技术,包含34个放电支路,通过4个铁基非晶磁芯耦合。每支路由2个40nF电容器和1只4间隙串联气体开关组成,回路电感为220nH。设计了水电阻负载检验模块输出性能,在匹配状态下,负载上的输出电流峰值916 k A,上升时间99.8 ns。设计了磁绝缘传输线将输出脉冲传输至Z-pinch丝阵负载,并利用"零维模型"对LTD模块和负载的耦合放电进行了模拟计算。结果显示,丝阵负载上的放电电流峰值可达960 k A,上升时间为114 ns。

A design of a pulsed discharge cavity for Z-pinch wire-array implosion experiments on basis of the Linear Transformer Driver(LTD)technology is presented.The cavity is consisted of 34 bricks,which are coupled through 4 Matglas toroidal cores.Each brick has two 40 nF capacitors and a gas switch with 4 gaps in series,and the loop inductance is 220 nH.The cavity can generate a 916 kA,99.8 ns pulse to the matched resistance making of water resistors.A magnetically insulated transmission line is designed to transmit the pulse from the LTD cavity to a wire array Z-pinch load.Simulation using the“zero dimension model”is conducted,showing that the pulsed current on the wire array is 960 kA at peak value and 114 ns at rising time.