真空电子技术Issue(6)：10-16,44,8.DOI:10.16540/j.cnki.cn11-2485/tn.2023.06.02
基于碳纳米管冷阴极的微焦点X射线源及其应用
Micro-focus X-Ray Source Based on Carbon Nanotube Cold Cathode and Its Application
摘要
Abstract
As a new cold cathode electron source,carbon nanotube(CNT)field emission source can o-vercome the shortcomings of traditional hot cathodes.The scanning imaging system based on CNT cold cathode micro-focus X-ray source can realize the characteristics of pulsed emission,high-speed photography and low dose.CNT is considered a kind of core cathode material that can replace hot cathode material in X-ray tubes.At present,CNT has shown great application values in the fields of biomedicine,non-destruc-tive testing and scientific research,but there are still bottlenecks in the reliability,working life and current emission density of CNT cathodes in technical realization.The development history of micro-focus X-ray sources is reviewed and the preparation process of CNT cold cathodes is introduced.The great successes a-chieved by CNT cold cathode micro-focus X-ray sources in industrial and medical fields are shown.The problems encountered in the development and the future development direction are discussed according to actual research situation.关键词
碳纳米管/冷阴极/微焦点X射线源/场致发射Key words
Carbon nanotube/Cold cathode/Microfocus X-ray source/Field emission分类
电子信息工程引用本文复制引用
王艳,刘冠宏,王雷程,陈泽祥,于思明,张鹏程..基于碳纳米管冷阴极的微焦点X射线源及其应用[J].真空电子技术,2023,(6):10-16,44,8.基金项目
四川省自然科学基金项目(2022NSFSC0517,2023NSFSC0642) （2022NSFSC0517,2023NSFSC0642）
