红外技术, 2015, 37 (4): 327, 网络出版: 2015-04-28
微通道板的离子反馈对像增强器性能升级的影响分析及改进途径探究
Influence Analysis of Ion Feedback of Microchannel Plate on Image Intensifiers Performance Upgrade and Its Improvement Approach Exploration
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
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.
Abstract
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.
潘京生, 邵爱飞, 孙建宁, 苏德坦, 陆强. 微通道板的离子反馈对像增强器性能升级的影响分析及改进途径探究[J]. 红外技术, 2015, 37(4): 327. PAN Jing-sheng, SHAO Ai-fei, SUN Jian-ning, SU De-tan, LU Qiang. Influence Analysis of Ion Feedback of Microchannel Plate on Image Intensifiers Performance Upgrade and Its Improvement Approach Exploration[J]. Infrared Technology, 2015, 37(4): 327.
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