强流电子束加速器运行过程电磁辐射的实验研究

摘要

强流电子束加速器运行时,临近的计算机和示波器会发生黑屏,这是由于在该过程中产生了较强的电磁辐射干扰.采用实验研究的方法,对实验室研制的强流电子束加速器产生的电磁辐射进行了测量和分析.结果表明:强流电子束加速器产生的电磁辐射主要来源于初级气体开关触发、初级气体开关导通以及气体主开关自击穿导通3个过程.其中,初级气体开关导通时辐射的电磁波强度较大,其强度最大处在与开关相同高度的位置.此外,强流电子束加速器在运行过程中的电磁辐射为低频辐射,主频为21 MHz.%The radiation generated in the process that the intense electron-beam accelerator is running with pseudo load can lead to the black screen of the nearby computer and oscillograph. In this study, the research using experiment method is carried out on this problem. Three radiation periods are demonstrated in the experiment, corresponding to the time when the trigger signal arrives, the primary switch operates and the main switch operates, respectively. The radiation generated when the primary switch' operates is larger than that generated when the main switch operates. The radiation in the second period reaches the largest intensity at the same height as the primary switch. The analysis of frequency spectra shows that the radiation in the experiment is mainly concentrated in low frequency range with the main frequency of 21 MHz.