252Cf源辐射背景对X光闪光照相光电接收系统的影响
Influence of irradiation background of 252Cf source on photo-electrical receiving system in X-ray flash radiography
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摘要: 在有核环境下的X光闪光照相中，为保证CCD光电接收系统的安全和有效使用，开展了科研所需剂量的辐射背景对闪光照相光电接收系统影响的研究。理论分析结果表明:科研要求的辐射剂量远小于X光闪光照相光电接收系统各器件的辐射损伤阈值，不会造成辐射损伤；辐射背景在CCD相机图像上形成的本底灰度对成像质量的影响很小。实验结果显示，通过建立和选择适当的屏蔽方式可以保证以下两点:一是科研所需剂量的辐射背景在CCD相机图像上形成的本底灰度要小于科学级相机的固有本底噪声，可以保证图像质量；二是在科研所需剂量的粒子和射线辐射下，X光闪光照相光电接收系统工作正常。Abstract: For the X-ray flash radiography in nucleus irradiation surroundings, research about the influence of the irradiation dose of research demand on photo-electrical receiving system was done to ensure the safe and effective using of the system. The outcome of theoretical analysis showed that the irradiation dose of research demand was far less than the radiation hardness of each component in photo-electrical receiving system and the influence of irradiation surroundings on the background noise of CCD camera was small. The experiment based on the theoretical analysis indicated that, by establishing and adopting suitable shielding measures, the background grey scale of irradiation surroundings to CCD camera for study was less than the inherent background noise of the scientific level CCD and the
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