场发射阴极微焦点X射线管初步研究  

Preliminary Research on Micro-Spot X-Ray Tubes Using Field Emission Cathodes

作　　者：李兴辉[1] 胡银富[1] 蔡军[1] 白国栋[1] 寇建勇[1] 冯进军[1] 廖复疆[1] 

机构地区：[1]北京真空电子技术研究所微波电真空器件国家级重点实验室,北京100015

出　　处：《真空电子技术》2016年第1期5-6,10,共3页Vacuum Electronics

基　　金：科技部国家重大科学研究计划项目资助(项目编号2013BC933602)

摘　　要：本文研究目标是实现碳纳米管场发射阴极、微焦点、快速反应X射线管,实现目标参数为工作电压40kV,工作电流1mA,X射线焦斑尺寸直径小于0.5mm。通过模拟计算,确定了碳纳米管阴极,金属网格栅极,双环圈聚焦极,阳极的结构方案。并在碳纳米管阴极研制,金属栅网加工,电子枪装配等方面进行了初步研究,为实现X射线整管奠定基础。The goal of this research is to develop an instant turn-on,micro-spot X-ray tube based on a carbon nanotube field emission cathode.The tube is expected to produce a micro-spot less than 0.5mm at a voltage of 40 kV and a current of 1mA.By CST simulation,the X-ray tube with carbon nanotube cathode,mesh extracting electrode,double focusing electrodes and high voltage anode was designed.Some preliminary research was carried out on carbon nanotube cathode fabrication,metal mesh electrode machining and electron gun assembling,which made a basis for X-ray tube fabrication.

关 键 词：场发射阴极 碳纳米管 微焦点 X射线管 

分 类 号：TN14[电子电信—物理电子学]