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激光打靶过程会产生大量的电磁脉冲,脉冲强度大,频带宽,会影响各种重要诊断设备的正常运行以及精密物理结果的精确测量。本实验在神光Ⅲ主机装置靶室壁和靶室外搭建诊断系统,并利用自行设计的多款天线进行脉冲信号的采集,为电磁脉冲特性的进一步研究提供了实验依据。本文分别对电场天线与磁场天线采取不同的数据处理方法以获得靶场电磁场分布,多发数据表明,大盘锥天线测得信号最强,超频段偶极天线测得信号最弱,靶室内外均产生较强的电磁干扰,需要进行相应的电磁屏蔽。
Laser shooting process will produce a large number of electromagnetic pulse, pulse intensity, frequency bandwidth, will affect the normal operation of a variety of important diagnostic equipment and accurate measurement of the precise physical results. In this experiment, a diagnostic system was set up in the target chamber and the target chamber of Shenguang III host device. The pulse signal was collected by a variety of antennas designed by ourselves, which provided experimental evidence for the further study of electromagnetic pulse characteristics. In this paper, different data processing methods are applied to the electric field antenna and the magnetic field antenna to obtain the electromagnetic field distribution of the shooting range. Multiple data show that the measured signal is the strongest in the market and the weaker in the overband frequency dipole antenna. Strong electromagnetic interference, the need for the corresponding electromagnetic shielding.