影响双碱光阴极量子效率的关键技术研究  

Key technologies towards high quantum efficiency K_2CsSb photocathode

作　　者：谢华木[1] 王尔东 XIE Hua-mu WANG Er-dong(State Key Laboratory of Nuclear Physics and Technology, Institute of Heavy Ion Physics, Peking University, Beijing, 100871, China Brookhaven National Laboratory, Upton, New York 11973, USA)

机构地区：[1]核物理与核技术国家重点实验室,北京大学重离子物理研究所,北京100871 [2]布鲁克海文国家实验室,美国纽约州11973

出　　处：《真空》2016年第6期51-53,共3页Vacuum

摘　　要：K_2CsSb光阴极由于具备诸多优势而成为高亮度电子源的首选,应用于世界上许多大科学装置中。K_2CsSb光阴极的制备设备与制备工艺是世界上各大实验室的研究重点,本文系统研究了双碱光阴极制备过程中的关键问题,对影响双碱光阴极量子效率的重要因素,如基底种类,基底表面粗糙度,反应薄膜厚度,Cs激活工艺等方面都进行了研究,形成了一套稳定可重复的高性能双碱光阴极的制备工艺。Alkali antimonide photocathode was used widely in scientific facilities around the world for its high quantum efficiency, low intrinsic emittance and long lifetime at reasonable vacuum. In this literature, different substrates, thickness of the Sb and K films, surface roughness of the cathode puck and the Cs activation process were systematically investigated. A stable and repeatable recipe was developed to get high quantum efficiency bialkali photocathode.

关 键 词：K2CsSb光阴极 量子效率 表面粗糙度 Cs激活工艺 

分 类 号：TB741[一般工业技术—材料科学与工程]