以碳纳米管阵列为场致发射阴极的X射线源研究  

Research of X-Ray Source Using Carbon Nanotubes Based Field-Emission Cathode

作　　者：解滨[1] 陈波[1] 宋航[2] 元光[2] 巩岩[1] 尼启良[1] 

机构地区：[1]中国科学院长春光学精密机械与物理所应用光学国家重点实验室 [2]中国科学院长春光学精密机械与物理所激发态物理重点实验室,长春130022

出　　处：《光学学报》2004年第10期1434-1436,共3页Acta Optica Sinica

摘　　要：碳纳米管具有优异的场发射性能 ,是一种很有前景的电子发射源。实验使用印刷方法将碳纳米管制备于玻璃基底 ,并作为X射线源的阴极。阳极材料为铜 ,其顶端为半球形 (半径为 2mm)。高压电源输出在 0～ 19kV之间可调。射线源工作真空度为 1× 10 -4Pa ,利用流气式正比计数器测到了铜kα 谱线 ,并且进行了连续 4h的运行。实验结果表明X射线源发光稳定 ,碳纳米管可以作X射线源的阴极。最后提出了改进的X射线源结构。Carbon nanotubes (CNTs) is a kind of prosperous field-emission material. It can be made as field emission cathode of X-ray source. In experiments, CNTs using as cathode is printed on glass base, the anode was made of Cu and processed to a cylinder with one end made to a hemisphere whose radius is 2 mm. High voltage supply are tunable in the range of 0～19 kV. X-ray source is stably runing for four hours at work vacuum of 1×10 -4 Pa. At last, k α line spectrum is detected by the flow-gas proportional counter. The experimental results reveal that the emission of X-ray source are stable and CNTs is well fitted to X-ray source cathode. The fitful structure of field emission X-ray source was given out in the end.

关 键 词：X射线源 碳纳米管 场致发射 流气式正比计数器 光谱 

分 类 号：O434.1[机械工程—光学工程] O462.4[理学—光学]