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本文介绍光电倍增管抗饱和门的工作原理。用它测量了强流电子束在靶上能量沉积产生冲击波的速度,由光电倍增管探测连续波He-Ne激光束照射靶的后表面的反射光束。为避免激光束长时间照射引起光电倍增管饱和,只让电子束到达靶前几十微秒时光电倍增管处于工作状态(开态),其它时间在非工作状态(关态),抗饱和门的作用象一个开关。我们采用低压脉冲控制抗饱和门,在实验中用这种方法探测强激光没有饱和。
This article describes the photomultiplier tube anti-saturation door works. Using it to measure the velocity of high-intensity electron beam deposited on the target to produce shock wave, the photon multiplier tube detects the reflected beam from the back surface of the target irradiated by the continuous wave He-Ne laser beam. In order to avoid prolonged exposure of the laser beam to cause the photomultiplier tube to be saturated, the photomultiplier tube is in the working state (on state) only when the electron beam reaches the target several tens of microseconds, and the other time is in the non-working state Like a switch. We use low-pressure pulse-controlled anti-saturated door, in this experiment to detect strong laser is not saturated.