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@INPROCEEDINGS{Galnander:347659,
      author       = {Galnander, Björn Patrik and Kozlova, Ekaterina and
                      Ondreka, David and Sokolov, Alexej and Spiller, Peter and
                      Stadlmann, Jens},
      title        = {{S}tudying {X}-{R}ay {S}pectra of the {SIS}18
                      {E}lectrostatic {S}epta to {M}easure {T}heir {E}lectric
                      {F}ield},
      publisher    = {JACoW Publishing, Geneva, Switzerland},
      reportid     = {GSI-2023-01077},
      pages        = {3 pages0.803 MB},
      year         = {2021},
      note         = {Published by JACoW Publishing under the terms of the
                      Creative Commons Attribution 3.0 International license.},
      comment      = {Proceedings of the 12th International Particle Accelerator
                      Conference, IPAC2021, Campinas, SP, Brazil},
      booktitle     = {Proceedings of the 12th International
                       Particle Accelerator Conference,
                       IPAC2021, Campinas, SP, Brazil},
      abstract     = {The synchrotron SIS18 at GSI uses resonant extraction for
                      slow beam extraction on the order of seconds. For some time,
                      there has been an unexplained discrepancy of the slow
                      extraction with a lower extraction efficiency than expected
                      at the highest beam energies. Recent machine studies have
                      indicated that the deflection by the electrostatic septum
                      might be less than the nominal 2.5 mrad, leading to
                      increased losses at the magnetic septum. In this paper, we
                      pursue an idea to directly measure the voltage of the
                      electrode gap by utilizing the fact that dark current
                      electrons accelerated in the gap of the electrostatic
                      extraction septum generate Bremsstrahlung X-rays when
                      hitting the anode. The high-energy cut-off of the X-ray
                      spectra then corresponds to the voltage of the electrode
                      gap. Measurements of the X-ray spectra at the extraction
                      septum of SIS18 have been performed using a solid-state CdTe
                      detector. This technique provides an in-situ measurement of
                      the voltage applied to the electrostatic extraction channel
                      and has proven to be a useful diagnostics tool.},
      month         = {May},
      date          = {2021-05-24},
      organization  = {The 12th International Particle
                       Accelerator Conference, Campinas
                       (Brazil), 24 May 2021 - 28 May 2021},
      keywords     = {Accelerator Physics (Other) / MC7: Accelerator Technology
                      (Other)},
      cin          = {SYS},
      cid          = {I:(DE-Ds200)SYS-20121002OR231},
      pnm          = {6G14 - GSI-MU Ion Facilities (POF4-6G14)},
      pid          = {G:(DE-HGF)POF4-6G14},
      experiment   = {$EXP:(DE-Ds200)External_experiment-20200803$},
      typ          = {PUB:(DE-HGF)8 / PUB:(DE-HGF)7},
      doi          = {10.18429/JACOW-IPAC2021-THPAB157},
      url          = {https://repository.gsi.de/record/347659},
}