Z箍缩装置负载区能量耗散及负载动态阻抗分析

Investigation of Energy Dissipation of Z-Pinch Load Zone and Load Varying Electric Impedance

基于“强光一号”装置加速器平面型铝丝阵Z箍缩实验结果,分析了驱动器负载区的能量馈入及后期能量溃散情况和Z箍缩负载动态阻抗的变化情况。研究结果表明:馈入Z箍缩负载区的电能量在后期一直局限于负载区内,使负载区成为后期能量耗散区,表现出负载电流拖尾现象;负载动态阻抗在Z箍缩聚爆阶段主要表现为动态变化的集中电感,电感变化量约为10 nH,从滞止时刻起,负载等效电阻将快速增加,在约10 ns内增加至1Ω量级。进一步分析了动态阻抗对Z箍缩驱动器负载电流的影响。分析结果表明,电感主要影响负载电流的上升时间和峰值,而等效电阻主要影响滞止时刻负载电流的幅值。

In this paper,the energy dissipation and the varying electric impedance of the Z-pinch load are investigated based on the aluminum planar wire array experiments carried out on“Qianguang-I”accelerator.It is shown that the electric energy input into the Z-pinch load zone is restricted and dissipated within the zone after the Z-pinch process,and form the load current tail phenomenon.The load varying impedance exhibits a raving lump-inductance during the implosion phase with the variation of~10 nH,and the load equivalent resistance will increase rapidly to the order of 1Ωin 10 ns.The influence of dynamic impedance on the load current of Z-pinch driver is further analyzed.The result shows that the inductance mainly affects the rising edge and the peak value of load current,while the equivalentresistance mainly affects the load current waveform after the stagnation of the pinch load.