Author: Sheng, W.F.
Paper Title Page
TUPA04 Investigations on Stability Performance of Beamline Optics Supports at BSRF 125
 
  • W.F. Sheng, H. Liang, Y.S. Lu, Z. Zhang
    IHEP, Beijing, People’s Republic of China
 
  Funding: This research is supported by National Natural Science Foundation of China (NSFC) (No.11905243).
The stability of beamline optics directly affects the beamline’s performances, such as coherence, focal size, position stability of the beam and so on, it has become a serious issue for a low emittance 4th generation light source. The vibration transmitting function of supports plays a big role in the stability performance of the optics. In order to find out a stable supporting structure, several types of support structures were tested, and the transfer ratio were described. The result shows that wedge struc-tures generally have a lower transfer ratio, and point contact support structures should be avoided.
 
poster icon Poster TUPA04 [2.193 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2020-TUPA04  
About • paper received ※ 01 August 2021       paper accepted ※ 17 September 2021       issue date ※ 29 October 2021  
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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.
 
poster icon Poster TUPA08 [2.346 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2020-TUPA08  
About • paper received ※ 06 August 2021       paper accepted ※ 15 October 2021       issue date ※ 03 November 2021  
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TUPA09
Beamline Design Consideration on the Thermal Deformation for High Energy Photon Source  
 
  • F.G. Yang, Y.H. Dong, L. Gao, M. Li, W.F. Sheng, H.R. Wang, X.W. Zhang
    IHEP, Beijing, People’s Republic of China
 
  Funding: This work is supported by National Natural Science Foundation of China (Grant No. 11505212, No. 11875059); Youth Innovation Promotion Association, Chinese Academy of Sciences.
To exploit the high quality of the X-ray beam generated by the new advanced light source, high precision optics instruments are necessary. However, the heat-loading optics including monochromator and white beam mirror have been a big issue, which introduces the wavefront distortion. In this paper, we present the effect of the thermal deformation on the beamline performance, and show the simulation results in our new high energy source - HEPS. Accordingly, the requirement of the thermal deformation is provided for different application.
 
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