平滑型耐高温碳场发射体SCFE在真空X射线管内的试用  

Application Research of Smooth High Temperature Resistant Carbon Field Electron Emitter for a Commercial X-ray Tube

作　　者：刘光诒[1] 吕庆年 夏善红[1] 王德安 李悌兴 李宏彦[3] 丁耀根[4] 鞠仲谋 

机构地区：[1]中国科学院电子学研究所传感技术国家重点实验室,北京100080 [2]北京瑞琦伟业技术开发有限公司,北京100080 [3]京东方科技集团股份有限公司电子材料事业部,北京100016 [4]中国科学院电子学研究所微波器件中心,北京100080

出　　处：《液晶与显示》2008年第2期247-251,共5页Chinese Journal of Liquid Crystals and Displays

摘　　要：为改进便携式RTX-150Ⅱ型X射线机内真空园锥靶脉冲X射线管的性能,研制成功了一种平滑型耐高温碳场电子发射体SCFE,该SCFE阴极首次装入X射线管即表现出了良好的性能,目前装入整机已1年多,尚未见有发射性能衰变,与该管以前采用的耐高温碳场电子发射体CFE比较,除阴极表面光洁度、体积密实度大大提高,管内零件安装更精密,与管内其他电极的接触更完善等较明显的改善外,阴极总厚度降低至1mm,特别是发射尖端处的厚度减小到了微米量级,电子发射的区域更加集中,初步试用的结果显示,电子发射性能、整管的工作稳定度都确有提高。A smooth high temperature resistant carbon field electron emitter（SCFE） has been proposed for replacing an original high temperature resistant carbon field electron emitter（CFE）. Their electron emission, processes, post treatment technologies, lifetime and so on were compared. It was able to be seen that the SCFE shows a more smooth surface, with bulk tightness, improved electron emission properties, decreased emitter thickness, and the contact between electrodes is perfect than that ever. The electron emission area has been concentrated on a more thin edge, and got a high precision for tube＇s electrodes construction. Initial experiments indicated that those X-ray tubes with SCFE have been maintaining its properties up to now since August last year.

关 键 词：碳场电子发射体 平滑型耐高温碳场电子发射体 真空脉冲X射线管 

分 类 号：TN383.1[电子电信—物理电子学]