基于第一性原理计算的空间微波器件低的二次电子发射系数材料的研究

doi:10.3901/JME.2018.09.115

机械工程学报 ›› 2018, Vol. 54 ›› Issue (9): 115-120.doi: 10.3901/JME.2018.09.115

• 特邀专栏：航天先进制造技术专栏 • 上一篇下一篇

基于第一性原理计算的空间微波器件低的二次电子发射系数材料的研究

王筱杰¹, 王大威², 李永东¹, 苌群峰³, 张楚贤³

1. 西安交通大学电子物理与器件教育部重点实验室西安 710049;
2. 西安交通大学微电子学院与金属材料强度国家重点实验室西安 710049;
3. 北京航天微机电技术研究所北京 100094

收稿日期:2017-06-30 修回日期:2017-11-27 出版日期:2018-05-05 发布日期:2018-05-05
通讯作者: 李永东(通信作者),男,1974年出生,博士,教授,博士研究生导师。主要研究方向为微波与等离子体电子学。E-mail:leyond@xjtu.edu.cn
作者简介:王筱杰,男,1993年出生。主要研究方向为微波与等离子体电子学。E-mail:18710629686@163.com
基金资助:
国家自然科学基金资助项目（U1537210）。

Low Secondary Electron Yield Materials for Space Microwave Devices Based on First Principles Computation

WANG Xiaojie¹, WANG Dawei², LI Yongdong¹, CHANG Qunfeng³, ZHANG Chuxian³

1. Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Xi'an Jiaotong University, Xi'an 710049;
2. School of Microelectronics and State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049;
3. Beijing Institute of Aerospace Micro-Electromechanical Technology, Beijing 100094

Received:2017-06-30 Revised:2017-11-27 Online:2018-05-05 Published:2018-05-05

摘要/Abstract

摘要： 将第一性原理计算方法应用于空间大功率微波器件的低的二次电子发射系数材料的选材研究上。依据材料最大二次电子发射系数与功函数的关系，发现具有较低功函数的材料可能同时具有较低的最大二次电子发射系数值。以此为基础，对石墨烯结构覆盖的Ni （111）和Pd （111）表面形成的两种复合结构的功函数进行了计算，结果表明复合材料的功函数数值要明显的低于两种组分材料所具有的功函数数值。这一结果显示复合材料有可能具有较低的最大二次电子发射系数，为低的二次电子发射系数材料的选材的研究提供了新的思路和方法。

关键词: 第一性原理, 二次电子发射, 功函数

Abstract: First-principles computation is used in an attempt to identify materials with low secondary electron yield for high power microwave devices used in space. Based on the relation between the maximum secondary electron yield and the work function of materials, it is suggested that materials with lower work function may have lower maximum secondary electron yield. Following this lead, the work functions of two kinds of composite structures, which are formed by the coverage of the graphene structure on Ni (111) and Pd (111) surfaces, are calculated, which show that the composite material has a work function that is substaintially lower than either of its two components. Such result indicates that the composite material may have low maximum secondary electron yield. This approach provides new ideas for selecting materials with low secondary electron yield.

Key words: first principles, secondary electron emission, work function

中图分类号:

TG156

王筱杰, 王大威, 李永东, 苌群峰, 张楚贤. 基于第一性原理计算的空间微波器件低的二次电子发射系数材料的研究[J]. 机械工程学报, 2018, 54(9): 115-120.

WANG Xiaojie, WANG Dawei, LI Yongdong, CHANG Qunfeng, ZHANG Chuxian. Low Secondary Electron Yield Materials for Space Microwave Devices Based on First Principles Computation[J]. Journal of Mechanical Engineering, 2018, 54(9): 115-120.

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基于第一性原理计算的空间微波器件低的二次电子发射系数材料的研究

Low Secondary Electron Yield Materials for Space Microwave Devices Based on First Principles Computation

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