Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2016, Vol. 27 ›› Issue (5): 115 doi: 10.1007/s41365-016-0105-7

• SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS • Previous Articles     Next Articles

Soller slits automatic focusing method for multi-element fluorescence detector

Ya-Yun Yang 1,2 , Qian Gao 1 , Song-Qi Gu , Hai-Sheng Yu 1 , Rui-You Lu 1,2 , Yu-Ying Huang 1   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Contact: Qian Gao E-mail:gaoqian@sinap.ac.cn
  • Supported by:

    This work was supported by National Nature Science Foundation of China (No. 11175244).

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Ya-Yun Yang, Qian Gao, Song-Qi Gu, Hai-Sheng Yu, Rui-You Lu, Yu-Ying Huang. Soller slits automatic focusing method for multi-element fluorescence detector.Nuclear Science and Techniques, 2016, 27(5): 115     doi: 10.1007/s41365-016-0105-7
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Abstract:

In X-ray absorption fine structure (XAFS) experiments, Soller slits are widely used as filter devices in order to improve the signal to noise ratio. Performing high accuracy manual focusing operations is a time-consuming process; therefore, this work introduces an automatic focusing method for Soller slits in multi-element fluorescence detectors. This method establishes a relation model between the fluorescence intensity distribution and the coordinates of the fluorescence excitation point. According to this relation model, the actual coordinates of the fluorescence excitation point can be deduced from the detected fluorescence intensity distribution and used in focusing operations. This method has proven to be feasible in an XAFS experiment at the BL14W1 beamline of the Shanghai Synchrotron Radiation Facility.

Key words: Soller slits, Least square fitting method, Multi-element fluorescence detector, X-ray absorption fine structure