Nuclear Techniques ›› 2017, Vol. 40 ›› Issue (1): 10101-010101.doi: 10.11889/j.0253-3219.2017.hjs.40.010101

• SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS •     Next Articles

Study on crystal bending performance of high energy Laue monochromator

ZHANG Haiyun1,2, ZHU Wanqian1, QIN Hongliang1, XUE Song1   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Zhangjiang Campus, Shanghai 201204, China;
    2 University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-09-29 Revised:2016-11-13 Online:2017-01-10 Published:2017-01-11
  • Supported by:

    Supported by National Major Scientific Instruments and Equipment Development Projects (No.Y319071061), Young Scholars Development CooperationGroup of Shanghai Institute of Applied Physics, Chinese Academy of Sciences (No.Y329051061)

Abstract:

Background: A water-cooled high energy double Laue crystal monochromator (DLM) will be employed on ultra-hard applications beamline to be built in phase II project at Shanghai Synchrotron Radiation Facility (SSRF). Its crystal bending performance is very important for satisfying design requirements. Purpose: This study aims to find appropriate coupled meridional and sagittal bending of the bender, to obtain optimal the monochromatic beam flux and energy resolution. Methods: The rigidity matrix of the crystal was calculated by using MATLAB. Two main factors, anisotropic elasticity of the asymmetric-cut crystal and aspect ratio, are considered to optimize the crystal bendings by finite element analysis (FEA) using ANSYS Workbench. Results & Conclusion: Analysis results show the cutting edge of crystal length and width goes along the[011] and[0-11] direction, respectively. The optimized crystal geometry is 90 mm×40 mm×1 mm. Furthermore, the meridional and sagittal slope errors of the crystal are 3.02 μrad and 1.25 μrad, respectively, which meet the requirements well.

Key words: Laue crystal monochromator, Bender, Anisotropy, Aspect ratio, FEA

CLC Number: 

  • TL503.4