同步辐射实验配置对晶体摇摆曲线的影响

李中亮; 杨俊亮; 朱晔; 薛莲; 宋丽

doi:10.37188/OPE.20202809.1950

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同步辐射实验配置对晶体摇摆曲线的影响

现代应用光学 | 更新时间：2020-09-28

- 同步辐射实验配置对晶体摇摆曲线的影响
- Effect of the synchrotron radiation experiment configuration on the rocking curve of crystal
- 光学精密工程 2020年28卷第9期页码：1950-1957
- 作者机构：
  
  1.中国科学院上海高等研究院上海同步辐射装置, 上海 201204
  2.中国科学院北京高能物理研究所北京同步辐射装置, 北京 100049
  3.中国科学院大学, 北京 100049
- 作者简介：
  
  [ "李中亮(1982-), 男, 山东阳谷人, 副研究员, 2011年于中国科学技术大学获得博士学位, 主要从事同步辐射X射线光学元件及光束线设备工作波长检测方法的研究。E-mail:lizhongliang@zjlab.org.cn" ]
  [ "杨俊亮(1993-), 男, 河北邯郸人, 博士研究生, 2015年于河北师范大学获得学士学位, 主要从事同步辐射光束线建设与应用方面的研究。E-mail:yangjl@ihep.ac.cn" ]
- 基金信息：
  
  国家自然科学基金青年基金资助项目(11505279);国家自然科学基金青年基金资助项目(11605279)
- DOI：10.37188/OPE.20202809.1950
  中图分类号： O434.12;O721
- 收稿日期：2020-03-10，
  
  修回日期：2020-04-08，
  
  录用日期：2020-4-8，
  
  纸质出版日期：2020-09-25
- 稿件说明：
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李中亮, 杨俊亮, 朱晔, 等. 同步辐射实验配置对晶体摇摆曲线的影响[J]. 光学精密工程, 2020,28(9):1950-1957.

Zhong-liang LI, Jun-liang YANG, Ye ZHU, et al. Effect of the synchrotron radiation experiment configuration on the rocking curve of crystal[J]. Optics and precision engineering, 2020, 28(9): 1950-1957.
李中亮, 杨俊亮, 朱晔, 等. 同步辐射实验配置对晶体摇摆曲线的影响[J]. 光学精密工程, 2020,28(9):1950-1957. DOI： 10.37188/OPE.20202809.1950.

Zhong-liang LI, Jun-liang YANG, Ye ZHU, et al. Effect of the synchrotron radiation experiment configuration on the rocking curve of crystal[J]. Optics and precision engineering, 2020, 28(9): 1950-1957. DOI： 10.37188/OPE.20202809.1950.

摘要

为了精确测量加工、夹持、装调等工艺引起的晶体摇摆曲线的微小变化，建立了高分辨的在线检测系统。研究了同步辐射实验配置对晶体摇摆曲线的影响。首先利用DuMond图解法定性分析了不同实验配置中光束带宽和角发散的影响，根据DuMond图解结果和X射线晶体动力学衍射理论，推导出晶体摇摆曲线宽度的经验公式。然后研究了同步辐射在线检测系统提升角分辨率的方法，利用高指数面的Si（333）切槽晶体、Si（775）定能量分析晶体抑制光束的带宽和角发散，调制出高分辨的检测光束。最后在上海光源X光学测试线搭建了检测系统，测量了Si（111）晶体摇摆曲线并验证了经验公式。实验结果表明，Si（111）晶体摇摆曲线半高宽的测量值4.79"@12.763 keV，与动力学衍射的理论值4.70"差值在2%以内，可满足晶体摇摆曲线微小变化的检测需求。

Abstract

A high-resolution detection system was established on a beamline to accurately measure the slight broadening of crystal rocking curves

caused by cutting

clamping

adjustment

and other processes. Further

the effect of the configuration of the synchrotron radiation experiment on the rocking curve of a crystal was studied. First

the effects of different experimental configurations on the beam bandwidth and angular divergence were analyzed by producing DuMond diagrams. Using the DuMond diagram results and X-ray crystal dynamics diffraction theory

an empirical formula for the rocking curve width was derived. Moreover

a method to improve the angular resolution of the synchrotron radiation detection system was studied. A high-index surface Si (333) channel-cut crystal and a Si (775) monolithic double-crystal monochromator are used to suppress the bandwidth and angular divergence of the beam and modulate a high-resolution detection beam. Finally

a detection system was built on the X-ray test beamline at the Shanghai Synchrotron Radiation Facility. The rocking curve of the Si (111) crystal was measured by the system

and the measured result verified the empirical formula. The experimental results show that the measured value of the full width at half-maximum for the rocking curve of the Si (111) crystal is 4.79" at 12.763 keV. This measured value is within 2% of the theoretical value of 4.70" for dynamical diffraction

allowing small changes in the rocking curves of crystals to be detected.

关键词

Keywords

references

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