冷阴极技术及其在大功率真空电子器件中的应用  

Cold cathode technology and its application in high-power vacuum electronic devices

作　　者：于彩茹 刘京[1] 王琦龙[1] 狄云松[1,2] 朱卓娅[1] 张晓兵[1] 雷威[1] 

机构地区：[1]东南大学电子科学与工程学院,江苏南京210096 [2]南京师范大学物理科学与技术学院,江苏南京210097

出　　处：《太赫兹科学与电子信息学报》2016年第1期148-154,158,共8页Journal of Terahertz Science and Electronic Information Technology

基　　金：中国工程物理研究院太赫兹科技基金资助项目(CAEPTHZ201203);国家自然科学基金资助项目(51120125001)

摘　　要：场致发射阴极作为重要的电子源之一,在真空电子器件的发展进程中扮演了重要的角色。在与固态器件的竞争中,真空电子器件朝大功率高频方向持续发展,场致发射阴极的应用使其在器件尺寸、可靠性、功耗和工作频率等方面具备了较大的改进空间。本文综述了近年来大电流场致发射阴极技术进展,特别介绍了碳纳米管场致发射阴极的发展。试验表明在直流测试条件下,该类型场致发射阴极发射电流密度已可达到A/cm2量级,且可以实现长寿命高稳定发射,未来在场致发射阴极微波放大器、自由电子激光器和新型中子源等方面将有广泛的应用前景。Field emission cathode plays an important role in the development of vacuum electron devices. In competition with solid-state devices, vacuum electron devices develop sustainably towards high frequency and high power. Field emission cathodes make it more practical to improve the size, the reliability, the power consumption and the operating frequency, etc. This article reviews the recent development of the high-current-density field emission cathodes. Especially, experimental results show that the emission current density of carbon nanotube field emission cathode is up to A/cm2 stably during a long time, which confirms the possibility to realize the applications in field emission microwave amplifier, free electron lasers and novel neutron source.

关 键 词：场致发射阴极 碳纳米管 大功率 真空电子 

分 类 号：TN103[电子电信—物理电子学]