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@INPROCEEDINGS{Hetzel:1034956,
      author       = {Hetzel, Jan and Lehrach, Andreas and Breitkreutz, Bernd and
                      Grigoryev, Kirill and Thelen, Michael and Niedermayer,
                      Philipp and Gebel, Ralf and Kamerdzhiev, Vsevolod and
                      Valdau, Yury},
      title        = {{F}inal preparation of accelerated and polarised protons at
                      {COSY} {J}ülich},
      volume       = {IPAC 2024},
      publisher    = {JACoW Publishing},
      reportid     = {FZJ-2025-00068},
      series       = {Journals of Accelerator Conferences Website (JACoW)},
      pages        = {1657-1660 pages0.62 MB},
      year         = {2024},
      note         = {Published by JACoW Publishing under the terms of the
                      Creative Commons Attribution 4.0 license. Any further
                      distribution of this work must maintain attribution to the
                      author(s), the published article's title, publisher, and
                      DOI.},
      abstract     = {2023 was the last year of operation for the Cooler
                      Synchrotron (COSY) in Jülich, Germany. To prepare for the
                      extraction of polarized protons at a momentum of 1950 MeV/c
                      to an external target, full advantage of the most recent
                      developments of the COSY control system was taken along with
                      the established hardware of COSY. Challenges in beam
                      development included the operation close to transition
                      energy as well as seven depolarizing resonances (4 intrinsic
                      and 3 imperfection resonances) which have to be crossed
                      during the acceleration. To overcome the intrinsic
                      resonances tune jumps were carried out with the Q-jump
                      quadrupole system of COSY*. To identify the correct time
                      window for the jump, the precise measurement of the tune
                      during the acceleration ramp was used. We present how the
                      recent developments in the control system, along with the
                      established techniques, enabled us to successfully
                      accelerate and extract the polarized beam.},
      month         = {May},
      date          = {2024-05-19},
      organization  = {15th International Particle
                       Accelerator Conference, Nashville, TN
                       (USA), 19 May 2024 - 24 May 2024},
      keywords     = {Accelerator Physics (Other) / mc4-hadron-accelerators -
                      MC4: Hadron Accelerators (Other) / MC4.A24 - MC4.A24
                      Accelerators and Storage Rings, Other (Other)},
      cin          = {IKP-4},
      cid          = {I:(DE-Juel1)IKP-4-20111104},
      pnm          = {621 - Accelerator Research and Development (POF4-621)},
      pid          = {G:(DE-HGF)POF4-621},
      typ          = {PUB:(DE-HGF)8 / PUB:(DE-HGF)7},
      doi          = {10.18429/JACOW-IPAC2024-TUPS12},
      url          = {https://juser.fz-juelich.de/record/1034956},
}