| 大口径椭球型单管X射线聚焦镜设计与仿真 |
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| 引用本文： | 邵尚坤,袁天语,李惠泉,孙学鹏,华陆,刘志国,孙天希.大口径椭球型单管X射线聚焦镜设计与仿真[J].北京师范大学学报(自然科学版),2022,58(5):681-685. |
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| 作者姓名： | 邵尚坤 袁天语 李惠泉 孙学鹏 华陆 刘志国 孙天希 |
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| 作者单位： | 北京师范大学射线束技术教育部重点实验室，核科学与技术学院，100875，北京 |
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| 基金项目： | 国家重点研发计划“基础科研条件与重大科学仪器设备研发”资助项目(2021YFF0701202)；国家自然科学基金资助项目(11875087) |
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| 摘 要： | 针对同步辐射光源点到样品距离长的特点，设计了镀膜与非镀膜这2种大口径椭球型单管X射线聚焦镜，并利用带有面型误差模型的仿真程序模拟了这2种大口径椭球型单管X射线聚焦镜的聚焦性能．结果表明:镀Ir膜的大口径椭球型单管X射线聚焦镜的入口直径、焦斑尺寸、焦深分别为19.0 mm、7.1 μm和0.2 mm，接收立体角约为未镀膜聚焦镜的3倍；未镀膜聚焦镜的入口直径和焦斑尺寸分别为15.0 mm和6.4 μm，焦深为镀Ir膜聚焦镜的4倍．分析了大口径椭球型单管X射线聚焦镜的面型误差对其焦斑尺寸的影响，讨论了大口径椭球型单管X射线聚焦镜的应用前景．
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| 关 键 词： | 大口径椭球型单管X射线聚焦镜 同步辐射X射线光源 面型误差 |
| 收稿时间： | 2022-03-29 |
Design and simulation of large-diameter ellipsoidal single-bounce capillary lens |
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| Institution: | The Key Laboratory of Beam Technology of the Ministry of Education, College of Nuclear Science and Technology, Beijing Normal University, 100875, Beijing, ChinaInstitute of Radiation Technology, Beijing Academy of Science and Technology, 100875, Beijing, China |
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| Abstract: | Two large-diameter single-bounce ellipsoidal capillary lens were designed for synchrotron radiation source, one was coated and the other was not．Performance was simulated with a surface error model．Entrance diameter of Ir-coated capillary was 19.0 mm, focal spot size was 7.1 μm, focal depth was 0.2 mm; receiving solid angle was 3-fold of uncoated one．Entrance diameter of uncoated capillary was 15.0 mm, focal spot size was 6.4 μm; focal depth was 4-fold of Ir-coated one．The relationship between surface error and focal spot size was studied．The application of large-diameter single-bounce ellipsoidal capillary in related X-ray technology was discussed． |
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