激光聚变物理中电磁脉冲辐射特性研究

Electromagnetic Pulse Radiation Characteristics Research in Laser Fusion Physics

激光聚变物理过程中会产生大量的电磁脉冲辐射,该电磁脉冲频谱宽,强度大,会对各诊断设备的正常运行以及精密测量造成不同程度的影响。为了研究该电磁脉冲的特性,为其产生机制研究和优化防护措施提供依据,对本次实验,在神光Ⅲ主机装置上进行。并在靶室内外搭建天线诊断系统,对电磁脉冲信号进行采集。本文讨论分析了靶室内小盘锥和矩形全向天线所采集的信号,并且两款天线所测时域信号值在特征峰位置吻合得相当好,所测频谱也最大范围的囊括了示波器的频域值,图像清晰的显示了激光与黑腔靶相互作用过程的4个电磁脉冲产生机制。

Laser fusion physics will produce a large number of electromagnetic pulse radiation, the electromagnetic pulse spectrum is wide and the intensity is high, it will be caused different degrees of impact on the normal operation and precision measurement of the diagnostic equipment. In order to study the characteristics of the electromagnetic pulse. To provide a basis for the mechanism of research and optimization of protective measures. This experiment, in the SG Ⅲ host device on. And the antenna diagnosis system is in the chamber inside and outside, collecting the electromagnetic pulse signal. This article analyzes the target of indoor small discone and collected signals, the rectangular antenna and two antenna measured time domain signals match quite well in characteristic peak position, the measured spectrum also contains the largest oscilloscope frequency domain values, and the image clearly shows the four processes of the interaction between the laser and the black-cavity target.