External trigger technique of high speed signal of beam parameters measurement system under strong electromagnetic interruption
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摘要: 在实验的基础上给出了束参数时间分辨测量系统的实验布局和特点，分析高压电磁干扰对直线感应加速器中时间分辨测量系统外触发性能的影响和变化规律；进一步探讨系统高压电磁干扰后的抑制措施。针对电磁空间干扰情况，主要通过采用光纤传输控制信号的措施，能很好地传输窄脉冲，信号延时抖动小于2 ns，达到了高速信号的可靠传输要求，采用嵌入式控制器既解决了抗电磁干扰的要求，也满足了束参数时间分辨测量系统的使用要求。Abstract: Strong electromagnetic interference in the high power linear induction accelerator (LIA) is disadvantageous to electron-beam-parameters measurement and diagnosis system. In this paper, electromagnetic interference effect on time-resolved electron-beam-parameter measurement system is analyzed, and the method for controlling the electromagnetic interference is discussed. With fiber embedded technology, narrow impulse signals are dependably transmitted, signal delay jitter is less than 2 ns. The experiment showed that the measuring system is characterized with the features of high reliability and achieves the application requirements.
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