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为诊断激光打靶产生的电磁脉冲信号分布,选取环天线作为主要电磁脉冲信号采集装置,对靶室内外信号同时进行测试。从天线设计制作到天线标定,描述了脉冲诊断系统的搭建。通过对信号进行采集及处理,对比分析了靶室外、法兰口及靶室内脉冲信号的频域特性和强度。得出靶室内受到电磁脉冲辐射强度最大且频谱分布最广,其次是法兰口,靶室外电磁脉冲信号最弱。总结多次激光打靶电磁脉冲信号频域分布,可看出波峰主要出现在0.5,1.2,3GHz。电磁脉冲时域结果规律性展示出脉冲持续约100ns,因靶室内回波振荡,电磁脉冲信号于几ns处及几十ns处有较明显峰值蔟。
In order to diagnose the distribution of electromagnetic pulse signals generated by laser shooting, a loop antenna is selected as the main electromagnetic pulse signal acquisition device, and the signals inside and outside the target chamber are tested at the same time. From antenna design to antenna calibration, describes the establishment of pulse diagnostic system. By collecting and processing the signals, the frequency domain characteristics and intensities of the pulse signals outside the target chamber, the flange port and the target chamber are compared and analyzed. The results show that the intensity of the electromagnetic pulse radiated by the target chamber is the largest and the spectrum is the most widely distributed, followed by the flange port, and the electromagnetic pulse signal of the target chamber is the weakest. Summarize the frequent frequency distribution of electromagnetic pulse signals of laser targeting, it can be seen that the peaks mainly appear at 0.5, 1.2 and 3 GHz. The regularity of electromagnetic pulse time-domain results shows that the pulse lasts for about 100ns. Due to the echo oscillation in the target chamber, the electromagnetic pulse signal has obvious peaks at several ns and several tens of ns.