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 ›› 2010, Vol. 21 ›› Issue (2): 65-68 doi: 10.13538/j.1001-8042/nst.21.65-68


Cooling of double crystal monochromator with sagittal focus at SSRF

WANG Naxiu1,* LIU Shilei1,2 XU Zhongmin1 BIAN Fenggang1   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China 2 Graduate University of Chinese Academy of Sciences, Beijing 10049, China
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WANG Naxiu, LIU Shilei, XU Zhongmin, BIAN Fenggang. Cooling of double crystal monochromator with sagittal focus at SSRF.Nuclear Science and Techniques, 2010, 21(2): 65-68     doi: 10.13538/j.1001-8042/nst.21.65-68


In SSRF, the design of 1st crystal cooling geometry of double crystal monochromator with sagittal focus is mainly reported by China. Our simulation indicates that the broadening of the full width at half maximum of the rocking curve of the double crystal monochromator induced by the heat load is about 3.7 μrad, and is in agreement with the experimental value of 5 μrad. Our scheme showed that the photon flux is reliably linear with electron current of the storage ring, which is extracted from the monochromator.

Key words: Double crystal monochromator, Direct cooling, Thermal distortion, Rocking curve, Simulation