真空电子技术Issue(3)：1-7,7.DOI:10.16540/j.cnki.cn11-2485/tn.2025.03.01
碳纳米管场发射过程中的阴极电子发散角调控研究
Regulation of Field Emission Angle in a Carbon Nanotube Cold Cathode
摘要
Abstract
Carbon nanotubes(CNTs)represent a significant class of cold cathode electron emission materi-als.However,CNTs exhibit dispersed electron emission directions in field emission,and the emission angle influ-ences the trajectory of electrons in vacuum and the focusing size of electron beams.To address this problem,this study employs a combination of particle simulations and fluorescence imaging experiments of electron beams to investigate and design a CNTs cathode with groove structure.The variation in electron emission angle with differ-ent groove heights is explored,so as to optimize the structure and reduce the divergence angle of the electron beam.Notably,when the cathode is positioned below the top surface of the groove,the electron emission angle is less than 10°,demonstrating excellent directionality.The research makes CNTs suitable for various high-perform-ance electron guns.关键词
碳纳米管/场发射/电子发散/荧光成像Key words
Carbon nanotubes/Field emission/Electron divergence/Fluorescence imaging分类
信息技术与安全科学引用本文复制引用
孙晓东,戴庆,李涌波,夏志强,王爱伟,陈科,周圣涵,李驰,赵立业,李振军..碳纳米管场发射过程中的阴极电子发散角调控研究[J].真空电子技术,2025,(3):1-7,7.基金项目
国家重点研发计划项目(2021YFC2802000) （2021YFC2802000）
国家自然科学基金(52372141 （）
51925203 （）
52222207) （）
中国科学院战略性先导研究计划(XDB36000000) （XDB36000000）
中国科学院技术支撑人才项目资助 （）
