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@ARTICLE{Wegmann:368168,
      author       = {Wegmann, Christoph Julien and Lens, Dieter and Zipfel,
                      Bernhard and Reinwald, Christoph and Klingbeil, Harald},
      title        = {{V}erification of the {B}eam {P}hase {C}ontrol {S}ystem
                      {T}opology for {FAIR} by {B}eam {E}xperiments},
      journal      = {IEEE transactions on nuclear science},
      volume       = {73},
      number       = {5},
      issn         = {0018-9499},
      address      = {New York, NY},
      publisher    = {IEEE},
      reportid     = {GSI-2026-00725},
      pages        = {1812 - 1822},
      year         = {2026},
      note         = {This work is licensed under a Creative Commons
                      Attribution-NonCommercial-NoDerivatives 4.0 License. For
                      more information, see
                      https://creativecommons.org/licenses/by-nc-nd/4.0/},
      abstract     = {Beam phase control loops have become an important
                      sub-system of the low-level radio frequency (LLRF) systems
                      of ion synchrotrons. A wide range of different
                      implementations exists today. The LLRF system at the GSI
                      Helmholtzzentrum für Schwerionenforschung (GSI)/Facility
                      for Antiproton and Ion Research in Europe (FAIR) was
                      designed with the particular goals of modularity,
                      flexibility, scalability, and user-friendly diagnostics
                      possibilities. Based on these requirements, a system focused
                      on the time-domain manipulation of all RF and beam signals
                      was developed. This contribution presents the beam phase
                      control system and demonstrates its effectiveness. The
                      special attention is paid to the operation during the
                      acceleration ramp. Results of two independent beam
                      experiments are presented: one focused on examining the
                      control loop behavior and one applying the system in a
                      practical setting. In both cases, the GSI/FAIR beam phase
                      control system successfully dampens longitudinal dipole mode
                      bunch oscillations. Its performance and behavior matches
                      previous analyses.},
      cin          = {RRF},
      ddc          = {620},
      cid          = {I:(DE-Ds200)RRF-20051214OR059},
      pnm          = {621 - Accelerator Research and Development (POF4-621)},
      pid          = {G:(DE-HGF)POF4-621},
      experiment   = {$EXP:(DE-Ds200)Experiment_without_proposal_number-20200803$},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1109/TNS.2026.3687074},
      url          = {https://repository.gsi.de/record/368168},
}