基于漏电流处理的高灵敏度多碱光电阴极制作  

Highly Sensitive Multi-Alkaline Photocathode Based on the Leakage Current Treatment

作　　者：崔万兵 李金沙[1] 杨壮 刘震 唐钦 钟梓源 张彦云[1,2] 方建翠 李波 杨锦邦 俞江平 伏兵 CUI Wanbing;LI Jinsha;YANG Zhuang;LIU Zhen;TANG Qin;ZHONG Ziyuan;ZHANG Yanyun;FANG Jiancui;LI Bo;YANG Jinbang;YU Jiangping;FU Bing(North Night Vision Technology Co.,Ltd,Kunming650217,China;The Key Laboratory on Night Vision Technology,Xi’an 710065,China;The Second Military Representative Office in Kunming,Kunming 650032,China)

机构地区：[1]北方夜视技术股份有限公司,云南昆明650217 [2]微光夜视技术重点实验室,陕西西安710065 [3]驻昆明地区第二军事代表室,云南昆明650032

出　　处：《云光技术》2024年第2期7-15,共9页

摘　　要：高灵敏度多碱光电阴极是决定超二代像增强器性能的关键因素。但在真空蒸发制作中,钾、钠蒸发经常出现漏电流过大,轻则降低了多碱光电阴极的灵敏度,重则导致不能形成多碱光电阴极结构。因之,本文从实际工艺流程出发,分析了产生漏电流的可能原因,试验量化对比了漏电流处理与否对多碱光电阴极灵敏度及其超二代像增强器成像质量的影响程度,提出了一种K-Na-Sb循环漏电流处理策略。基于K-Na-Sb循环漏电流处理的高灵敏度多碱光电阴极,有利于提升超二代像增强器的使用性能和经济效益。The sensitivity of the multi-alkali photocathode is a key factor in determining the performance of the super second generation image intensifier.However,in the preparation of the multi-alkali photocathode,the leakage current is generated due to the evaporation of potassium and sodium in a vacuum,which reduces the sensitivity of the multi-alkali photocathode,and the heavy one is resulting in the inability to form a multi-alkali photocathode structure.In this paper,we analyzed the possible causes of the leakage current,and compared quantitatively the influence of the leakage current treatment on the sensitivity of the multi-alkali photocathode and the imaging quality of its super second generation image intensifier,Therefore,we proposed a strategy of the leakage current treatment through the K-Na-Sb cycle.The highly sensitive multi-alkali photocathode based on the leakage current treatment through the K-Na-Sb cycle is conducive to improving the performance and economic benefit of the super second generation image intensifier.

关 键 词：多碱光电阴极 光电流 漏电流 灵敏度 像增强器 

分 类 号：TM9[电气工程—电力电子与电力传动]