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

doi:10.3901/JME.2018.09.115

Journal of Mechanical Engineering ›› 2018, Vol. 54 ›› Issue (9): 115-120.doi: 10.3901/JME.2018.09.115

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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

Abstract

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

CLC Number:

TG156

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

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