Author: Huang, T.
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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WEPAB199 Study on the Important Technologies of 300MeV Upgrade for the CSNS Injection System 3089
 
  • M.Y. Huang, C.D. Deng, L. Kang, L. Liu, Y. Liu, X. Qi, S. Wang, Q.B. Wu, Y.W. Wu, S.Y. Xu, W.Q. Zhang, Y.L. Zhang
    IHEP, Beijing, People’s Republic of China
  • J.X. Chen, T. Huang, H.C. Liu
    IHEP CSNS, Guangdong Province, People’s Republic of China
  
  Funding: This work was supported by National Natural Science Foundation of China (Project Nos. U1832210 and 12075134).
The China Spal­la­tion Neu­tron Source (CSNS-I) have achieved the de­sign goal of 100kW beam power on the tar­get in Feb., 2020. As the sec­ond phase of the CSNS, CSNS-II will achieve a beam power on the tar­get of 500 kW. The in­jec­tion en­ergy of CSNS-II will be in­creased from 80 MeV to 300 MeV and the av­er­age beam cur­rent of the Linac will in­crease 5 times. There­fore, the in­jec­tion sys­tem will re­quire a com­plete up­grade. In this paper, the de­sign scheme of the in­jec­tion sys­tem for CSNS-II will be in­tro­duced. The key tech­nolo­gies of the up­grade in­jec­tion sys­tem will be care­fully an­a­lyzed and pre-de­vel­oped, such as the pulse power sup­plies and their mag­nets, the spe­cial-shaped ce­ramic vac­uum cham­bers, the main strip­ping foil, the stripped elec­tron col­lec­tion, and so on. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB199  
About • paper received ※ 17 May 2021       paper accepted ※ 09 June 2021       issue date ※ 21 August 2021  
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