Influence of Sharpness of Single Crystalline LaB 6 Cone on Field Emission Characteristics:A CST Simulation Study [单晶LaB 6 尖锥几何结构对场发射性能影响的CST模拟] - 文章详情页

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Scopus PKU CSCD

摘要：

The　field　emission　of　single　crystalline　LaB　6　tip　was　mathematically　modeled　with　atruncated　cone　capped　with　a　hemisphere,theoretically　analyzed　in　Fowler-Nordheim　equation,and　numerically　simulated　with　CST　software.The　impact　of　the　cone-angle　and　spherical　radius　of　the　LaB　6　tipon　the　field　emission　behavior　was　investigated.The　simulated　results　show　that　the　tip　radius　significantly　affects　the　field　emission　behavior.For　example,as　the　tip　radius　decreases,the　field　emission　current　increased,simply　because　of　the　intensifying　emission　field.The　conical-shaped　emission　electron　beam　spreads　out　from　the　tip　apex.With　a　cone　angle　of40°,a　height　of　2mm　and　a　hemisphere　radius　of　0.1　μm,the　optimized　total　emission　current　was　25.5　μA　ata　field　of　7.22×10　7　V/cm.We　suggest　that　the　simulated　results　may　be　of　some　technological　interest　in　application　of　LaB　6　emitter.　©　2018,　Journal　of　Vacuum　Science　and　Technology　Publishing　House.　All　right　reserved.

关键词：

CST; Field emission; Single crystal Lanthanum hexaboride; Tip

作者机构：

[ 1 ] [Xiao, Y.]Key Laboratory of Advanced Functional Materials, Ministry of Education, College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China
[ 2 ] [Zhang, X.]Key Laboratory of Advanced Functional Materials, Ministry of Education, College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China
[ 3 ] [Liu, H.]Key Laboratory of Advanced Functional Materials, Ministry of Education, College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China
[ 4 ] [Feng, Q.]Key Laboratory of Advanced Functional Materials, Ministry of Education, College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China
[ 5 ] [Zhao, J.]Key Laboratory of Advanced Functional Materials, Ministry of Education, College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China
[ 6 ] [Zhang, J.]Key Laboratory of Advanced Functional Materials, Ministry of Education, College of Materials Science and Engineering, Beijing University of Technology, Beijing, 100124, China
[ 7 ] [Zhang, J.]School of Materials Science and Engineering, Hefei University of Technology, Hefei, 230009, China

通讯作者信息：

[Zhang, X.]Key Laboratory of Advanced Functional Materials, Ministry of Education, College of Materials Science and Engineering, Beijing University of TechnologyChina

电子邮件地址：

zhxin@bjut.edu.cn

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