| 利用多毛细管准直器测量X射线光源焦斑尺寸 |
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| 引用本文： | 孙天希,丁训良,刘志国,张美荣,罗萍,潘秋丽,李崇会,袁明年.利用多毛细管准直器测量X射线光源焦斑尺寸[J].原子能科学技术,2008,42(7):633-636. |
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| 作者姓名： | 孙天希 丁训良 刘志国 张美荣 罗萍 潘秋丽 李崇会 袁明年 |
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| 作者单位： | 1.北京师范大学 ;射线束技术与材料改性教育部重点实验室，北京 ; 100875； ;2.北京师范大学 ;低能核物理研究所，北京 ; 100875； ;3.北京市辐射中心，北京 ; 100875； ;4.北京一轻高级技术学校 ;数控教研室，北京 ; 100068 |
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| 基金项目： | 应用光学北京市重点实验室建设资助项目
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2008年度教育部科学技术研究重点项目:高品质X光器件的研究
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北京师范大学青年科学基金资助项目 |
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| 摘 要： | 设计了一种测量X射线光源焦斑尺寸的方法：多毛细管准直器法。整体玻璃毛细管X射线准直器是由数105根内径为几微米的单玻璃毛细管组成的X射线光学器件，X射线光源发出的发散X射线光束被多毛细管准直器约束后变为准平行束。准平行束的截面直径是X射线光源焦斑直径的函数，通过测量准平行束不同位置处的截面直径，利用线性拟合可得到X射线光源的焦斑直径。分别利用多毛细管准直器法和常用的小孔成像法测量了同一微焦斑X射线光源的焦斑直径，测量结果分别为60.8和59.4μm。多毛细管准直器法对焦斑直径在亚微米量级或更小X射线源的焦斑尺寸测量中将显示出更多的优势。
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| 关 键 词： | X射线光学 毛细管X射线光学器件 焦斑尺寸测量 |
| 收稿时间： | 2007-02-06 |
| 修稿时间： | 2007-03-23 |
Measurements of Focal Spot Size for X-ray Source by Using Polycapillary Collimator |
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| SUN Tian-xi DING Xun-lianget al.Measurements of Focal Spot Size for X-ray Source by Using Polycapillary Collimator[J].Atomic Energy Science and Technology,2008,42(7):633-636. |
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| Authors: | SUN Tian-xi DING Xun-liang |
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| Affiliation: | 1. Key Laboratory of Beam Technology and Materials Modification of Ministry of Education, Beijing Normal University, Beijing 100875， China； ;2. Institute of Low Energy Nuclear Physics, Beijing Normal University, Beijing 100875, China； ;3. Beijing Radiation Center, Beijing 100875， China； ;4. Numerical Control Teaching and Research Section, Beijing Yiqing High Technology School, Beijing 100068, China |
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| Abstract: | he method of measuring the focal spot size of X-ray source was designed by using a monolithic glass polycapillary X-ray collimator (MGPXRC). The MGPXRC is composed of 105 capillaries with an inner diameter of several microns. The divergent X-ray beam emitted from X-ray source became a quasi-parallel beam after collimated by MGPXRC. The quasi-parallel beam size is related to the focal spot size of X-ray source. Therefore, the focal spot size of X-ray source can be obtained by using the linear fit based on the quasi-parallel beam size at various distance from the output of the MGPXRC. The focal spot size of a micro X-ray source was measured by using the MGPXRC method and conventional pinhole imaging method, and the measured results are 60.8 and 59.4 μm, respectively. The MGPXRC can be used to measure the focal spot size of X-ray source with a larger emitting angle than the critical angle of the total reflection of X-rays. And the MGPXRC method has a potential application in the measurement of X-ray source with a spot size of a submicron or even smaller. |
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| Keywords: | X-ray optics capillary X-ray optics measurement of focal spot size |
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