% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@INPROCEEDINGS{Gtze:618818,
      author       = {Götze, Kathrin and Vagin, Pavel and Neumann, Paul and
                      Telawane, Sayali and Schoeps, Andreas and Ramm, Torsten and
                      N'Gotta, Patrick and Tischer, Markus},
      title        = {{S}et-up and characterisation of a permanent magnet-based
                      phase shifter series for {FLASH}2020},
      journal      = {Journal of physics / Conference Series},
      volume       = {3010},
      number       = {1},
      issn         = {1742-6588},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {PUBDB-2024-07172},
      pages        = {012018},
      year         = {2025},
      abstract     = {A compact, permanent magnet-based phase shifter was
                      developed for theupgrade of the free-electron laser FLASH at
                      DESY Hamburg. One phase shifter will bepositioned in each of
                      the ten intersections between two radiator undulators and
                      will allowfor a tuning of the electron trajectory to provide
                      constructive interference of the radiationof adjacent
                      undulators. Each phase shifter consists of eight permanent
                      magnet blocksmounted on a support structure with movable
                      gap. While building a prototype, it turnedout that angular
                      magnetization errors of the individual magnet blocks are the
                      main sourceof error that keeps us from achieving net zero
                      first and second field integrals. Therefore,all 88 single
                      magnet blocks were first characterized by stretched-wire and
                      Helmholtz coilmeasurements individually and were then sorted
                      according to the measurement resultsto achieve a
                      cancellation of the angular magnetization errors. Using a
                      dedicated guidingtool, the selected magnets were assembled
                      into the magnet keepers. The completed phaseshifter devices
                      were mapped by stretched-wire and Hall probe measurements.
                      In orderto deal with small remaining kick errors, a novel
                      tuning method was developed whichallows for a meticulous and
                      individual correction.},
      month         = {Aug},
      date          = {2024-08-26},
      organization  = {15th International Conference on
                       Synchrotron Radiation Instrumentation,
                       Hamburg (Germany), 26 Aug 2024 - 30 Aug
                       2024},
      cin          = {FS-US / ZM1},
      ddc          = {530},
      cid          = {I:(DE-H253)FS-US-20120731 / I:(DE-H253)ZM1-20120731},
      pnm          = {621 - Accelerator Research and Development (POF4-621) / 6G2
                      - FLASH (DESY) (POF4-6G2)},
      pid          = {G:(DE-HGF)POF4-621 / G:(DE-HGF)POF4-6G2},
      experiment   = {EXP:(DE-H253)FLASH2020p-20221201},
      typ          = {PUB:(DE-HGF)16 / PUB:(DE-HGF)8},
      doi          = {10.1088/1742-6596/3010/1/012018},
      url          = {https://bib-pubdb1.desy.de/record/618818},
}