Keyword: injection
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TUPYP047 Design of Liquid Injection Device for the Hard X-Ray Ultrafast Spectroscopy Experiment Station experiment, FEL, electron, free-electron-laser 97
 
  • L.H. Li, B. Li, X. Liu, J.W. Meng, T.C. Weng, K.Y. Zhang, R.X. Zhu
    ShanghaiTech University, Shanghai, People’s Republic of China
  
  Funding: The National Natural Science Foundation of China (Grant NO.21727801), the Shanghai Sailing Program (No.22YF1454600).
The Hard X-ray Ultrafast Spectroscopy Experiment Station (HXS) of the Shanghai high repetition rate XFEL and extreme light facility (SHINE) requires the design and manufacture of a specialized liquid sample injection device when studying the liquid phase state of matter. Due to the damage caused by high-repetition-rate XFEL pulses on the sample, it is necessary to ensure that the liquid sample is refreshed before the next pulse arrives. In order to reduce the impact of liquid film thickness on pump-probe ultrafast spectroscopy experiments, it is required that the liquid film thickness be less than 20 ¿m. This article describes the use of oblique collision of two jets, from simulation calculation to the construction of experimental device, and the use of absorption spectroscopy principle to construct a thickness characterization system. This system can stably produce ultrathin liquid films with thickness ranging from 3-20 ¿m. This article proposes views on the limitations and future improvements of this device. 		 
poster icon Poster TUPYP047 [0.494 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP047  
About • Received ※ 24 October 2023 — Revised ※ 04 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 18 December 2023
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THPPP028 Design and Analysis of CSNS-II Primary Stripper Foil GUI, radiation, operation, proton 319
 
  • J.X. Chen, Y.J. Yu, J.S. Zhang
    IHEP CSNS, Guangdong Province, People’s Republic of China
  • L. Kang, L. Liu, G.Y. Wang, J.B. Yu, J.Y. Zhang
    IHEP, Beijing, People’s Republic of China
  
  Funding: National Natural Science Foundation of China, 11975253
Stripper foil is a key equipment for converting negative hydrogen ions into protons in the RCS injection zone of CSNS. The structure of the CSNS primary stripper foil adopts a rotating steel strip structure, and the replacement time of the foil is long, requiring operators to carry out maintenance work in close proximity for a long time. The energy of CSNS-II injection beam has significantly increased from 80MeV to 300MeV, and the radiation dose in the injection area will also increase, making it impossible to maintain the equipment in close proximity for a long time. Therefore, it is necessary to redesign the primary stripper foil. This article will analyze the stripper efficiency and beam injection thermodynamics of CSNS-II stripper foil, carry out automatic foil store replacement structure design, motion analysis, and prototype testing, and envision remote maintenance solutions to achieve maintenance and repair of the stripper foil with minimal human intervention. 		 
poster icon Poster THPPP028 [3.748 MB]  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP028  
About • Received ※ 31 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 04 March 2024
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THPPP029 Technologies Concerning Metal Seals of the UHV System for Accelerators vacuum, interface, simulation, experiment 322
 
  • H.Y. He, Y.S. Ma
    IHEP, Beijing, People’s Republic of China
  • L. Liu, P.C. Wang
    IHEP CSNS, Guangdong Province, People’s Republic of China
  • B. Tan
    Institute of High Energy Physics, CAS, Guangdong, People’s Republic of China
  
  Reviewed the domestic research on structural design and sealing function principle of the metal seals, wildly used in the Ultra High Vacuum (UHV) system for accelerators. Analyzed and summarized the key technologies concerning the material, contact forms, machining process and test methods of sealing performance. The study will become the basis of designing, machining and quality measuring for the ultra-vacuum metal seals. It provided the foundation for generating seals standards to promote the development of vacuum technology application.  
DOI • reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP029  
About • Received ※ 27 October 2023 — Revised ※ 05 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 26 November 2023
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