MOPFAV —  Monday Poster Facilities   (28-Jun-21   11:00—12:00)
Paper Title Page
MOPFAV001
Overview of CW R&D With a European XFEL Cryomodule  
 
  • A. Bellandi, J. Branlard, J. Eschke, Ç. Gümüş, D. Kostin, R. Onken, J.K. Sekutowicz, E. Vogel
    DESY, Hamburg, Germany
 
  Since 2011 a research and development program is carried out at DESY to study the feasibility of a possible Continuous-Wave (CW) upgrade of the European X-ray Free Electron Laser (XFEL). Cryo-Module Test Bench (CMTB) is a test facility at DESY used to perform tests with accelerating modules equipped with TESLA-type superconducting cavities. In this proceeding, the most recent tests at CMTB on module XM50.1 are presented. For the European XFEL upgrade, a key-importance question to answer is the cryomodules’ heat load when driven in CW. Therefore, tests at accelerating gradients up to 19 MV/m per cavity at 2K were carried to determine the cavities’ dissipated power. Operating at QLs > 107 is also challenging for the LLRF: the narrow RF bandwidths involved require active online detuning disturbances rejection techniques. Therefore a new detuning estimator was developed. The estimator is also capable of working as a quench/multipacting detector. Tests on XM50.1 show that it is possible to estimate detuning disturbances with a sub-hertz precision and to catch multipacting events. Finally, the maximum achieved gradients with the module and after RF conditioning are presented.  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPFAV002 Commissioning of the UKRI STFC Daresbury Vertical Test Facility for Jacketed SRF Cavities 308
 
  • A.J. May, A.E.T. Akintola, A.R. Bainbridge, R.K. Buckley, G. Collier, P.A. Corlett, K.D. Dumbell, M.J. Ellis, S. Hitchen, P.C. Hornickel, G. Hughes, C.R. Jenkins, P.A. McIntosh, K.J. Middleman, A.J. Moss, N. Pattalwar, S.M. Pattalwar, M.D. Pendleton, P.A. Smith, A.E. Wheelhouse, AAJ. White, S. Wilde
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • M.D. Hancock, J. Hathaway, C. Hodgkinson, G. Jones, M. Lowe, D.A. Mason, G. Miller, J. Mutch, A. Oates, P. Sollars, J.T.G. Wilson
    STFC/DL, Daresbury, Warrington, Cheshire, United Kingdom
 
  A novel vertical test facility has been developed at the STFC Daresbury Laboratory. The VTF is designed to test 3 jacketed SRF cavities in a horizontal configuration in a single cool-down run at 2 K. Cavities were tested at low power levels for HOMs and passband modes, and Q vs E field measurements at high power levels. The specification requires an unloaded Q of 5·109 at a field gradient of 19.9 MV/m. The cavities are cooled with superfluid helium filled into their individual helium jackets. This reduces the liquid helium consumption by more than 70% in comparison with the conventional facilities operational elsewhere. The facility will be used to conduct a 2-year program to qualify 84 high-beta SRF cavities for the European Spallation Source as part of the UK’s in-kind contribution. This paper reports on the commissioning program, along with a detailed discussion of the RF and cryogenic operations and performance of the facility.  
DOI • reference for this paper ※ doi:10.18429/JACoW-SRF2021-MOPFAV002  
About • Received ※ 21 June 2021 — Revised ※ 12 July 2021 — Accepted ※ 21 August 2021 — Issue date ※ 20 October 2021
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPFAV004 First Vertical Test of a Prototype Crab Cavity for HL-LHC at FREIA Laboratory in Uppsala University 313
 
  • A. Miyazaki, K. Fransson, K.J. Gajewski, L. Hermansson, R.J.M.Y. Ruber
    Uppsala University, Uppsala, Sweden
 
  We developed and commissioned a new vertical test stand at FREIA Laboratory for the High-Lumi LHC project. The first cold test was performed with a prototype crab cavity (Double-Quarter-Wave cavity) and the obtained result met the project specification. This opened a new opportunity at Uppsala University for SRF science and engineering. In this poster, the result of the first cold test and plans for future experiments are presented.  
DOI • reference for this paper ※ doi:10.18429/JACoW-SRF2021-MOPFAV004  
About • Received ※ 21 June 2021 — Revised ※ 14 August 2021 — Accepted ※ 21 August 2021 — Issue date ※ 07 October 2021
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPFAV005 Operation Experience of the Superconducting Linac at RIKEN RIBF 315
 
  • N. Sakamoto, H. Imao, O. Kamigaito, T. Nagatomo, T. Nishi, K. Ozeki, K. Suda, A. Uchiyama, K. Yamada
    RIKEN Nishina Center, Wako, Japan
 
  After commissioning of the RIKEN superconducting linac (SRILAC) in the end of FY2019, heavy ion beams were provided to the nuclear physics experiments. In this paper operation history and evolution of field emission levels through the year will be presented.  
DOI • reference for this paper ※ doi:10.18429/JACoW-SRF2021-MOPFAV005  
About • Received ※ 02 July 2021 — Accepted ※ 27 October 2021 — Issue date ※ 10 April 2022  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)