Author: Shi, H.
Paper Title Page
TUPA08 Performance of a Double Crystal Monochromator Prototype for HEPS under Water Cooling Condition at a Wiggler Beamline of BSRF 135
  • H. Liang, W.F. Sheng, H. Shi, Y.M. Yang, L.R. Zheng
    IHEP, Beijing, People’s Republic of China
  Funding: This research is supported by National Natural Science Foundation of China (NSFC) (No.11905243).
The performance of monochromator is crucial to the performance of a beamline, especially for a 4th genera-tion synchrotron light source. To find out the perfor-mance of the monochromator prototype built for the HEPS project, it was tested at a wiggler beamline of BSRF with water cooling. The cooling of the crystals was measured by rocking curve broadening at different energy and cooling seems to be not enough due to indium foils. The repeatability in 1 hour was about 0.1 eV. The energy drift in 9 hours after the beam hit the beam-line was 0.4 eV at the Cu K edge. The short-term stability was tested with synchrotron beam under various cooling condition, and results between 4.4 nrad to around 400 nrad were observed. In conclusion, some performances are satisfying, but further improvements should be carried out in the future.
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About • paper received ※ 06 August 2021       paper accepted ※ 15 October 2021       issue date ※ 03 November 2021  
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