完成了小型方波脉冲磁场装置的双线圈负载设计,在一定区域内获得了近似匀强磁场.采用阻抗2Ω的6级脉冲形成网络作为初级储能和脉冲形成单元,对匹配电阻放电产生了方波脉冲电流波形.研制了一种场畸变气体火花间隙作为主放电开关,有效减小了装置的动作时延和分散性.实验结果表明:负载中心峰值磁感应强度达到0.04.T,方波磁场平顶时间约3μs,平顶度小于5％,上升前沿(磁感应强度峰值10％～90％)小于0.5 s,装置的动作时延抖动小于10 ns(标准偏差).%A double-coil load of the miniature square-pulsed magnetic field generator was proposed, and an evenly-distributed magnetic field was obtained in the load area. Six-stage pulse-forming network(PFN) with 2 Ω single-stage characteristic impedance was used as the primary energy storage and pulse-forming element, and it could output a square drive current pulse on the impedance-matched load. Furthermore, a field-distorted gas spark switch was developed as the main switch, and it could effectively reduce the action-delay time and its dispersion of the generator. Experimental results show that the peak value of the magnetic field at the center of the load area is 0. 04 T, the flat-top time is about 3 pis, the top-droop ratio is less than 5%, the risetime (10%-90% peak value of magnetic induction) is less than 0. 5 μs, and the action-delay-time dispersion of the generator is less than 10 ns (standard deviation).
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