Measurements of polycapillary X-ray optics using the knife-edge made of polymethyl methacrylate as a scatterer

SUN Tianxi LIU Zhiguo WANG Yan DING Xunliang

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Measurements of polycapillary X-ray optics using the knife-edge made of polymethyl methacrylate as a scatterer

更新时间：2021-03-12

- Measurements of polycapillary X-ray optics using the knife-edge made of polymethyl methacrylate as a scatterer
- NUCLEAR TECHNIQUES Issue 5, (2006)
- 作者机构：
  
  1. 射线束技术与材料改性教育部重点实验室北京师范大学低能核物理研究所北京市辐射中心
  2. 射线束技术与材料改性教育部重点实验室北京师范大学低能核物理研究所北京市辐射中心,北京,100875
- 作者简介：
- 基金信息：
- DOI：
  CLC： O434
- Published：01 May 2006
- 稿件说明：
移动端阅览
[1]孙天希,刘志国,汪燕,丁训良.利用背散射方法测量整体X光透镜的性能[J].核技术,2006(05):339-343.

SUN Tianxi LIU Zhiguo WANG Yan DING Xunliang. Measurements of polycapillary X-ray optics using the knife-edge made of polymethyl methacrylate as a scatterer[J]. Nuclear techniques, 2006, (5): 339-343.
[1]孙天希,刘志国,汪燕,丁训良.利用背散射方法测量整体X光透镜的性能[J].核技术,2006(05):339-343. DOI：

SUN Tianxi LIU Zhiguo WANG Yan DING Xunliang. Measurements of polycapillary X-ray optics using the knife-edge made of polymethyl methacrylate as a scatterer[J]. Nuclear techniques, 2006, (5): 339-343. DOI：

摘要

为了避免探测系统的死时间问题

采用有机玻璃刀口作为散射体来降低探测系统死时间。通过分析来自有机玻璃散射体的背散射谱

测量了不同能量X射线在透镜会聚光束中的空间分布

为分析“光晕（halo）”现象提供了能谱依据

在此基础上

系统地分析了“halo”现象。在大能量范围内

分别利用轴向扫描法和刀口扫描法测量了透镜出口焦距、发散度及焦斑大小与能量的关系。利用背散射方法测量透镜焦斑直径时的相对误差在3%以内;利用轴向扫描法确定透镜出口焦距时的绝对误差在–120—120μm之间。

Abstract

In order to avoid dead time problems in the detector system

the knife-edge made of polymethyl methacrylate is used as a scatterer. By using the backscattered spectrum from the knife-edge

the space distribution of the X-rays with different energies in the beam focused by the polycapillary X-ray lens

and the energy dependence of the focal spot size

divergence and output focal distance of the lens are measured over a broad energy range at the same time. The halo effect is analyzed in detail. Compared with the results from the existing method

the relative er- rors of the results for the focal spot size obtained by using the backscatter method are within 3%. Absolute errors of the measured output focal distance range from –120 to 120μm.

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