【摘要】 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。更多还原

【Abstract】 In this paper , the principle of the photomultiplier with an anti-saturation gate is described , which has been used to measure velocities of shock waves produced by electron beam deposition on targets A CW. He-Ne laser beam irradiates the rear surface of the target and the reflected light is detected by a photomultiplier . In order to avoid the saturation of the photomultiplier due to the long time irradiation of laser beam , the photomultiplier is turned on only a few tens of microsecond before the electron beam is generated .using an anti-saturation gate .We have developed an anti-saturation gate controlled by a pulse with low voltage amplitude . It has been shown in our experiment that this method can be used to detecte the intense laser beams without saturation .更多还原