Author: Dong, H.
Paper Title Page
MOPAB030 Research and Development Progress of CEPC RF Shield Bellows 142
 
  • J.M. Liu, Y.H. Guan, S.M. Liu, B. Tan, P.C. Wang
    DNSC, Dongguan, People’s Republic of China
  • H. Dong, Y. Ma
    IHEP, Beijing, People’s Republic of China
  • H.Y. He, T. Huang
    IHEP CSNS, Guangdong Province, People’s Republic of China
 
  The circular electron positron collider (CEPC) is a candidate for the next-generation electron positron collider, which can be used to accurately measure the Higgs and electroweak bosons. The RF shield bellow is a vacuum component necessary for the construction of CEPC. Therefore, a RF shield bellow model machine with an elliptical cross-section was designed and processed for technical verification. Based on the traditional interdigital structure, a special contact force testing device was also designed to reduce measurement errors. The on-off status of the circuit was used by the device to determine whether the spring finger was pulled up, thus reducing the influences of human factors in the measurement process. It can be known from the measurement results of the model machine that the contact force of the spring finger is between 120g and 130g, which can satisfy the technical requirements.  
poster icon Poster MOPAB030 [1.467 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB030  
About • paper received ※ 19 May 2021       paper accepted ※ 20 May 2021       issue date ※ 13 August 2021  
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MOPAB031 Development and Operation of Vacuum System for Rapid Cycling Synchrotron to Target Beam Transfer Line of China Spallation Neutron Source 145
 
  • J.M. Liu, Y.H. Guan, S.M. Liu, B. Tan, P.C. Wang
    DNSC, Dongguan, People’s Republic of China
  • H. Dong
    IHEP, Beijing, People’s Republic of China
  • H.Y. He, T. Huang
    IHEP CSNS, Guangdong Province, People’s Republic of China
 
  China Spallation Neutron Source (CSNS) is a major scientific project during the National Eleventh Five-Year Plan. It consists of a negative hydrogen ion linear accelerator, a rapid cycling synchrotron ( RCS), a linac to RCS beam transfer line (LRBT), an RCS to target beam transfer line (RTBT), and a target station. As an important part of CSNS, the RTBT connects the rapid cycling synchrotron and the target window. This paper described the design requirements, technical solutions, and operating conditions of the vacuum system for the CSNS RCS to target beam transfer line. In addition, the fast valve protection system and its verification results were also expounded. The CSNS has been in operation for over three years, during this period, the beam power has been gradually improved from 10KW to 100KW, and the vacuum system for RTBT has been operating stably.  
poster icon Poster MOPAB031 [0.581 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB031  
About • paper received ※ 19 May 2021       paper accepted ※ 24 May 2021       issue date ※ 25 August 2021  
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