真空电子技术Issue(6)：1-6,6.DOI:10.16540/j.cnki.cn11-2485/tn.2025.06.01
用于太赫兹行波管的自支撑碳材料场发射特性研究
Research on Field Emission Characteristics of Free-standing Carbon Materials for Terahertz Traveling Wave Tubes
摘要
Abstract
In order to meet the requirements of terahertz traveling wave tubes for high current density and miniaturized cathodes,free-standing carbon nanotube films,free-standing graphene films,and carbon nanotube yarns with different structures are designed and prepared,and the emission performances of them are tested.The free-standing carbon nanotube film with a 5 mm edge can maintain stable emission current of 21 mA.It can get a maximum current of 26.5 mA with an emission current density of 8.83 A/cm2.The maximum emission current of the free-standing graphene film with a 10 mm edge is 25 mA,and the emission current density is 17.9 A/cm2,which is twice that of the free-standing carbon nanotube film.The maximum emission current of the carbon nano-tube yarn with a diameter of 60 μm is 7.6 mA,and the emission current density is as high as 268.9 A/cm2.These cathodes can generate sufficient current to drive the device operation,providing a reference for cathode selection for sheet beam and circular beam terahertz traveling wave tubes.关键词
太赫兹/碳纳米管/石墨烯/自支撑Key words
Terahertz/Carbon nanotube/Graphene/Free-standing分类
信息技术与安全科学引用本文复制引用
HAN Pan-yang,LI Xing-hui,CAI Jun,FENG Jin-Jun,PAN Pan..用于太赫兹行波管的自支撑碳材料场发射特性研究[J].真空电子技术,2025,(6):1-6,6.基金项目
中国电子科技集团公司第十二研究所稳定支持科研经费资助项目 （）
