真空器件中电极表面微结构对其二次电子发射性能的影响  

Impacts of Surface Microstructures of the Electrodes in Vacuum Devices on Their Secondary Electrons Emission Performances

作　　者：黄艳峰[1] 张文斌[1] 李荣洁[1] 曹亮亮[1] 曾燕伟[1] 

机构地区：[1]南京工业大学材料学院,江苏南京210009

出　　处：《真空电子技术》2014年第5期62-65,98,共5页Vacuum Electronics

摘　　要：本文在概述金属材料二次电子发射性能和用于行波管多级降压收集极的低二次电子发射系数电极材料研究的基础上,对电极材料表面尖锥阵列微结构层对二次电子发射性能的影响进行了有限元计算分析,进而提出了具有三维网络结构的电极表面微结构层概念,为构建新型超低二次电子发射系数电极材料提出了思路。On the basis of a brief review of the secondary electrons emission performances of metals and the research on the electrode materials with low secondary electron emission coefficients for TWT’s MDC, the impacts of the superficial spire-array microstructures of electrodes in MDC on the effective secondary electron emission coefficient have been analyzed by a finite element numerical calculation. Furthermore, a novel surface microstructure with 3-dimensional network of the electrodes with ultralow secondary electron emission coefficientare proposed and discussed in regard to its potential merits.

关 键 词：二次电子发射 电极材料 表面微结构 

分 类 号：TB741[一般工业技术—材料科学与工程]