嵌套法拉制具有微米级束斑的X射线聚焦锥形单毛细管  

Nested method to X-ray focus conical single capillary with micron beam spot

作　　者：叶磊 王兴艺 罗恒 周末 段嘉宇 林晓燕[1] 刘志国[1] 李玉德[1] YE Lei;WANG Xingyi;LUO Heng;ZHOU Mo;DUAN Jiayu;LIN Xiaoyan;LIU Zhiguo;LI Yude(College of Nuclear Science and Technology,Beijing Normal University,Key Laboratory of Beam Technology of Ministry of Education,Beijing Radiation Center,100875,Beijing,China)

机构地区：[1]北京师范大学核科学与技术学院教育部射线束技术重点实验室北京市辐射中心

出　　处：《北京师范大学学报（自然科学版）》2019年第4期456-461,共6页Journal of Beijing Normal University(Natural Science)

基　　金：国家重大科学仪器设备开发专项子任务资助项目(2013YQ24051104);国家青年自然科学基金资助项目(11505009)

摘　　要：提出并使用嵌套法拉制工艺实现锥形单毛细管微米级内径,从而实现X射线传输的微米级束斑.利用高精度光纤拉丝塔,拉制了锥形单毛细管,出口内径达到7.50μm,入口内径21.44μm.在锥形单毛细管出口2mm处经过刀口扫描得到6.1μm的Cr靶Kα-X射线束斑,束斑发散度为3.9mrad,传输效率为20%,光强增益为15.7.实验验证了嵌套拉制工艺的可行性.A nested method is proposed to obtain micrometer inner diameter in a tapered single capillary used for micron beam spot X-ray transmission.Using a high-precision fiber drawing tower,the drawn tapered single capillary had a good geometric shape,the outlet inner diameter was 7.50μm,the inlet inner diameter was 21.44μm.A 6.1μm Cr target Kα-X ray beam spot was obtained by a knife edge scanning at a 2 mm exit of the tapered single capillary.Beam spot divergence was 3.9 mrad,transmission efficiency was 20%,light intensity gain was 15.7.These experiments verified the feasibility of nested drawing process.

关 键 词：嵌套拉制 X射线光学 锥形单毛细管 6.1μm微束斑 

分 类 号：O434.1[机械工程—光学工程]