Author: Kim, Y.
Paper Title Page
TUPOGE06 Performance Test of Mass-Production of HWR Cryomodules for SCL32 491
 
  • Y. Kim, J.W. Choi, D.H. Gil, H. Jang, Y.W. Jo, J. Joo, H.C. Jung, H. Kim, M.S. Kim, M. Kwon, M. Lee, J.H. Shin
    IBS, Daejeon, Republic of Korea
  • Y.U. Sohn
    PAL, Pohang, Republic of Korea
  
  Funding: This work was supported by the Rare Isotope Science Project of Institute for Basic Science funded by Ministry of Science and ICT and NRF of Korea (2013M7A1A1075764)
Mass pro­duc­tion of the HWR (half wave res­onator) cry­omod­ules for SCL32 of RAON had been con­ducted since 2018 and all cry­omod­ules were in­stalled in the SCL3 tun­nel in 2021. Total num­ber of the HWR cav­i­ties and the HWR cry­omod­ules are 106 and 34, re­spec­tively. Cry­omod­ule per­for­mance test was started in Sep­tem­ber 2020 and fin­ished in Oc­to­ber 2021, ex­cept for one bunch­ing cry­omod­ule that will be in­stalled in front of the high en­ergy linac. The de­tailed pro­ce­dure and the re­sults of per­for­mance test is re­ported in de­tail. 		 
poster icon Poster TUPOGE06 [1.211 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOGE06  
About • Received ※ 14 August 2022 — Revised ※ 23 August 2022 — Accepted ※ 12 September 2022 — Issue date ※ 15 September 2022
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THPOPA18 Development of a Tuner Control System for Low-Energy Superconducting Linac at RAON 778
 
  • H. Kim, M.O. Hyun, H. Jang, M.S. Kim, Y. Kim
    IBS, Daejeon, Republic of Korea
  
  Funding: This research was supported by the RISP of ibs funded by the Ministry of Science and the National Research Foundation (NRF) of the Republic of Korea under Contract 2013M7A1A1075764.
We pro­pose a tuner con­trol sys­tem for low-en­ergy su­per­con­duct­ing linac at RAON. The fre­quency error of the su­per­con­duct­ing cav­i­ties must be smaller than a few of Hz to op­er­ate in beam ac­cel­er­a­tion mode. To min­i­mize the freuqency error as much as pos­si­ble, the error is cal­cu­lated in the low-level RF(LLRF), and the pro­posed tuner con­trol sys­tem changes the su­per­con­duct­ing cav­ity fre­quency by using a me­chan­i­cal tuner and a motor at­tached to the cav­ity di­rectly. This con­trol sys­tem deals with not only the ini­tial fre­quency error of the cav­ity but also the fre­quency drift of the cav­ity in­duced by ex­ter­nal dis­tur­bance such as the slow fluc­tu­a­tion he­lium pres­sure au­to­mat­i­cally. In ad­di­tion, an au­to­matic pro­por­tional gain cal­i­bra­tion tech­nique is also pro­posed. In this paper, the de­tailed op­er­a­tion and tech­niques will be de­scribed. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-THPOPA18  
About • Received ※ 13 August 2022 — Revised ※ 23 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 11 September 2022
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)