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@INPROCEEDINGS{Ondreka:357444,
      author       = {Ondreka, David and Bozyk, Lars and Graeff, Christian and
                      Spiller, Peter and Stadlmann, Jens and Volz, Lennart},
      editor       = {Pilat, Fulvia and Fischer, Wolfram and Saethre, Robert and
                      Anisimov, Petr and Andrian, Ivan},
      title        = {{S}low extraction of a dual-isotope beam from {SIS}18},
      publisher    = {JACoW Publishing},
      reportid     = {GSI-2025-00401},
      pages        = {1698-1701 pages},
      year         = {2024},
      note         = {Published by JACoW Publishing under the terms of the
                      Creative Commons Attribution 4.0 license.},
      abstract     = {Recently, the heavy ion synchrotron SIS18 at GSI was for
                      the first time operated with a dual-isotope beam, made up of
                      12C3+ and 4He+. Such a beam can be used to improve carbon
                      radiotherapy by providing online information on dose
                      deposition, where the helium ions serve as a probe beam
                      traversing the patient while depositing a negligible dose.
                      For this, the accelerator has to deliver a slowly extracted
                      beam with a fixed fraction of helium over the spill. The
                      difference in mass-to-charge ratio of 4He compared to 12C is
                      small enough to permit simultaneous acceleration and to make
                      the two isotopes practically indistinguishable for the
                      accelerator instrumentation. Yet, it may cause a temporal
                      shift between the two components in the spill owing to the
                      sensitivity of slow extraction to tiny tune variations. We
                      investigated different extraction methods, and examined the
                      time-wise stability of the dual-isotope beam with a beam
                      monitoring setup installed in the GSI biophysics experiment
                      room. A constant helium fraction was obtained using
                      transverse knock-out extraction with adjusted chromaticity.},
      month         = {May},
      date          = {2024-05-19},
      organization  = {15th International Particle
                       Accelerator Conference, Nashville
                       (USA), 19 May 2024 - 24 May 2024},
      keywords     = {Accelerator Physics (Other) / mc4-hadron-accelerators -
                      MC4: Hadron Accelerators (Other) / MC4.A16 - MC4.A16
                      Advanced Concepts (Other)},
      cin          = {SYS},
      cid          = {I:(DE-Ds200)SYS-20121002OR231},
      pnm          = {621 - Accelerator Research and Development (POF4-621) /
                      6G14 - GSI-MU Ion Facilities (POF4-6G14)},
      pid          = {G:(DE-HGF)POF4-621 / G:(DE-HGF)POF4-6G14},
      experiment   = {$EXP:(DE-Ds200)Experiment_without_proposal_number-20200803$},
      typ          = {PUB:(DE-HGF)8},
      doi          = {10.18429/JACOW-IPAC2024-TUPS29},
      url          = {https://repository.gsi.de/record/357444},
}