【作者】 胡孟春； 叶文英； 唐正元； 杨洪琼；

【Author】 Hu Mengchun Ye Wengying Tang Zhenyuan Yang Hongqiong(Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China) (Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621900, China)

【机构】 中国工程物理研究院核物理与化学研究所； 中国工程物理研究院电子工程研究所；

【摘要】 在分析各种调节光电探测器灵敏度常用方法的基础上,提出一种提高光电探测器测量上限的方法,其基本要点是:通过使用狭缝准直器来限制进入光电探测器的辐射强度;通过使辐射侧照闪烁体,有效屏蔽或避开强辐射源对光电探测器光阴极的直接辐射干扰;通过拉开闪烁体至光阴极的距离,利用空气柱进一步衰减进入光电探测器光阴极的荧光光子数,按这种方法设计的光电探测系统,在相同的信噪比情况下可以测量更高的核辐射注量,本文提供了设计实物照片和实验测量数据。更多还原

【Abstract】 A method of improving measurement upper limit of photo-detector system is offered which based on analysing several common methods of adjusting photo-detector sensitivity,the main of this method is that the radiation intensity of entering photo-detector was confined by using narrow slot collimator;the straight radiation interfere to photo-cathode of photo-detector from radiation resource was shielded efficiently or prevented by using side radiation resource shining scintillation;fluorescence photons of entering photo-detector photo-cathode was attenuated by increasing the distance from scintillation to photo-cathode and using air columniation. The photo-detector system designed according to these means may measure higher nuclear radiation intensity in same signal to noise. Practicality photograph and experimental data are supplied.更多还原