氧化物阴极的多次曝大气应用

Application of Oxide Coated Cathode Exposed to Air Many Times

本文从氧化物阴极的工作机理出发，分析了氧化物阴极在使用时出现的异常现象和消除办法。讨论了如何正确的使用氧化物阴极，延长其使用寿命。根据动态发射中心理论提出了在动态真空系统中工作的电子枪多次曝露大气使用的方法，使在动态真空系统应用中阴极的使用寿命大大地延长。

From the working mechanism of oxide coated cathode,the appearing abnormal phenomenon when the oxide coated cathode is used in electron gun,and its eliminating methods are analyzed in this paper.The correct methods to use the oxide coated cathode are discussed.The way lengthening its life span is presented.According to the theory of dynamic emission center,a method using electron gun with oxide coated cathode,which can be applied in dynamic vacuum system and exposed to air many times,is suggested.Then the working life of the oxide coated cathode in a dynamic vacuum system can be greatly increased.