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@MASTERSTHESIS{Kahl:642125,
      author       = {Kahl, Laurenz Raphael},
      othercontributors = {Wiencek, Mateusz and Hillert, Wolfgang},
      title        = {{E}ffect of the cooldown velocity on the performance of
                      superconducting cavities},
      school       = {University of Hamburg},
      type         = {Bachelorarbeit},
      reportid     = {PUBDB-2025-05357},
      pages        = {41},
      year         = {2025},
      note         = {Bachelorarbeit, University of Hamburg, 2025},
      abstract     = {The medium temperature heat treatment of superconducting
                      radio frequency cavities is investigated to asses their use
                      in an upgrade of the European X-ray Free ElectronLaser. For
                      the medium temperature heat treatment, which alters the
                      cavity’s surface, the question is, which influences on the
                      performance of cavities do exist. The objectiveis, the
                      investigation into the effects of the cooldown velocity on
                      the cavity performance. To investigate whether this
                      influence exists, an analytical tool, has been developed,
                      toacquire the cooldown velocity. Furthermore, with the use
                      of this tool the investigation of this dependency was
                      started. The conclusion of the analysis is that the quality
                      factor andresidual resistance are depended on the cooldown
                      velocity. The accelerating gradient and quench limits of the
                      cavities seem to be unaffected. The strength of this
                      degradation of thecavities quality factor is observed to be
                      lower than $15\%.$ This could allow the use of these
                      cavities even if this degradation is unavoidable during the
                      cooldown of the cryomodulesat the European XFEL.},
      cin          = {MSL},
      cid          = {I:(DE-H253)MSL-20170609},
      pnm          = {621 - Accelerator Research and Development (POF4-621)},
      pid          = {G:(DE-HGF)POF4-621},
      experiment   = {EXP:(DE-H253)SRF-RD-20221201},
      typ          = {PUB:(DE-HGF)2},
      doi          = {10.3204/PUBDB-2025-05357},
      url          = {https://bib-pubdb1.desy.de/record/642125},
}