| 基于Micro-CT光机X射线源的单晶LaB6阴极的制备及其性能研究 |
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| 引用本文： | 马玉田,刘俊标,牛耕,赵伟霞,韩立.基于Micro-CT光机X射线源的单晶LaB6阴极的制备及其性能研究[J].CT理论与应用研究,2018,27(3):357-362. |
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| 作者姓名： | 马玉田 刘俊标 牛耕 赵伟霞 韩立 |
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| 作者单位： | 中国科学院电工研究所, 北京 100190 |
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| 基金项目： | 中国科学院科研装备研制项目(Y740441C71)，重大科学仪器设备开发项目(2017YFF0107202) |
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| 摘 要： | 本文采用电化学腐蚀方法和聚焦离子束技术制备了单晶LaB6针尖，借助电子扫描电镜对针尖进行微观形貌分析。在此基础上，研制热解石墨径向夹持直热式单晶LaB6阴极，对其发射性能及其在Micro-CT应用进行研究。研究表明，单晶LaB6阴极能够产生高亮度的电子束，提高了X射线亮度，提升了Micro-CT图像质量。
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| 关 键 词： | 显微计算机断层成像 单晶LaB6阴极 发射性能 X射线成像 |
| 收稿时间： | 2017-11-06 |
Research on the Preparation and Performance of LaB6 Single Crystal Cathode for Micro-computed Tomography |
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| MA Yu-tian,LIU Jun-biao,NIU Geng,ZHAO Wei-xian,HAN Li.Research on the Preparation and Performance of LaB6 Single Crystal Cathode for Micro-computed Tomography[J].Computerized Tomography Theory and Applications,2018,27(3):357-362. |
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| Authors: | MA Yu-tian LIU Jun-biao NIU Geng ZHAO Wei-xian HAN Li |
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| Institution: | Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | The LaB6 single crystal tip was prepared by the method of drop-off electrochemical corrosion and the technique of focus ion beam. The micro topography of LaB6 single crystal tip was analyzed by scanning electron microscope. On this basis, the Vogel-type LaB6 single crystal cathode is prepared. The emission performance and its application in Micro-CT are studied. The experimental results indicate that the LaB6 single crystal cathode have higher brightness of electron beam, which can improved the X-ray intensity and the whole performance of Micro-CT. |
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