碳纳米管场发射X光源测控系统设计  

The Design of a Measurement and Control System for CNT Field Emission x- ray Source

作　　者：石伟[1,2] 桂建保[2] 王欢[2] 洪序达[2] 陈垚[2] 

机构地区：[1]湖南大学电气与信息工程学院,长沙410006 [2]中国科学院深圳先进技术研究院,深圳518055

出　　处：《核电子学与探测技术》2015年第2期172-175,共4页Nuclear Electronics & Detection Technology

基　　金：国家科技支撑计划项目(2012BAI13B04)资助

摘　　要：现有的X射线源多采用热阴极,工作温度高、功耗大、不易实现多个阴极的集成和可编程控制。本实验室研制的新一代基于碳纳米管冷阴极场发射X光源系统,可以突破传统热阴极X射线源的上述缺陷,同时为CT系统实现高时间分辨,减少辐射剂量提供新的路径。针对新制备的CNT阴极场发射性能测试的需求,利用Lab VIEW软件平台设计了碳纳米管场发射X光源测控系统,该系统进行多次试验检验运行稳定可靠、自动化程度高、操作简便,能够实现对X光源的可编程控制,为稳定CNT阴极发射电流、提高阳极电压、材料老化提供可靠的测控平台。Most existing x-ray sources use hot cathodes with high working temperature and high power consumption are difficulty to realize the integration of multiple cathodes.Our laboratory developed cold cathode field emission x-ray system based on carbon nanotube.It can avoid this defect of the traditional hot cathode. At the same time, it provides a new path to enhance highly time-resolved performance and reduce radiation dose for CT system.Therefore, the CNT field emission x-ray measurement and control system is developed based on the LabVIEW software aimed at testing the sample of CNT cathode performance, this system proves to realize stable and reliable operation, high automatic measure and convenient operation, thus be able to program-matically control X-ray source and provide a reliable measurement and control platform for developing stable CNT cathode emission current, improving the anode voltage and the material aging effect.

关 键 词：LABVIEW 场发射 碳纳米管 X射线源 

分 类 号：TN873[电子电信—信息与通信工程]