微型磁探针在Z箍缩负载电流诊断中的应用

介绍了磁探针测量等离子体电流的设计原理,针对Z箍缩实验负载的实际结构特点和现场布局,制作出应用于诊断脉冲功率装置Z箍缩实验负载通过电流的微型磁探针,并通过建立相同结构尺寸的模拟负载装置的方法,实现了对其灵敏度的标定。实验结果显示:在脉冲功率装置峰值电流1.2MA、电流上升时间60ns时,由微型磁探针测得的负载电流与加速器监测电流存在12%的幅度差异,电流峰值时刻存在5ns的差异,说明微型磁探针技术测量Z箍缩负载电流的结果是可靠的。

Application of micro magnetic probe to diagnosis of load current in Z-pinch experiments

The design principle of magnetic probe for current measurement through plasmas is introduced. A micro magnetic probe device is manufactured to diagnose the load current in Z-pinch experiments on pulsed power facilities, according to the actual structure of wire-array load and the experimental layout. The sensitivity of the probe is calibrated through a load simulator that has the same size as the load used in experiments. Experimental results show that, when the pulsed power facility works at 1.2 MA peak current with 60 ns rise-time, the load current measured by this probe has 12% difference in magnitude and 5 ns difference in peak current time from that measured by accelerator current monitor.