Author: Kim, M.S.
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
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