摘要
通过引入像增强器噪声因子的概念,对几种典型的像增强器的有效量子效率进行了评比,分析了MCP工作状态下由倍增电子引发的离子反馈对像增强器的影响,说明了无论是砷化镓光阴极像增强器,还是多碱光阴极像增强器,要实现面向四代像增强器品质因数的性能升级,实现低离子反馈低噪声因子MCP都具有同等的必要性和重要性。而通过对MCP玻璃成份的优化改进,结合对MCP基体玻璃的晶化处理,达到对MCP基体的微结构改性,抑制产生离子反馈的有害物种在MCP通道内壁表面的形成,是实现低离子反馈MCP的有效技术途径。
The effective quantum availability of image intensifier for several typical image intensifier were evaluated by introducing a conception of noise factor of image intensifier, and the effect of ions feedback of MCP on performance of image intensifier is analyzed. Therefore, the realization of low ion feedback and low noise figure MCP for image intensifier performance to be upgraded to the fourth generation image intensifier merit figure is equally necessary and important for both GaAs photocathode image intensifier and multi-alkali photocathode image intensifier. The remodification of MCP substrate microstructure through the reformulation and devitrification treatment, and restricting ion poisoning resource formation within channel inner surface of MCP substrate, is an effective approach for the realization of low ion feedback and low noise figure MCP.
出处
《红外技术》
CSCD
北大核心
2015年第4期327-332,共6页
Infrared Technology
基金
国家自然科学基金面上项目
编号:61275152
关键词
像增强器
微通道板
离子反馈
光阴极灵敏
信噪比
分辨力
噪声因子
image intensifier
microchannel plate
ion feedback
signal to noise ratio
resolution
photocathode sensitivity
noise figure
