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@INPROCEEDINGS{Wenander:357735,
      author       = {Wenander, Fredrik and Sidorowski, Krystian and Forck, Peter
                      and Udrea, Serban and Mazzoni, Stefano and Sequeiro,
                      Cristina and Welsch, Carsten and Sameed, Muhammed and
                      Stringer, Oliver and Veness, Raymond and Lefevre, Thibaut
                      and Churchman, Ashley and Zhang, Hao and Ady, Marton and
                      Rossi, Adriana and Webber-Date, Alexander and Schneider,
                      Gerhard and Sedlacek, Ondrej},
      title        = {{I}maging a high-power hollow electron beam non-invasively
                      with a gas-jet-based beam profile monitor},
      publisher    = {JACoW Publishing},
      reportid     = {GSI-2025-00427},
      pages        = {4580-4583 pages},
      year         = {2023},
      note         = {Published by JACoW Publishing under the terms of the
                      Creative Commons Attribution 4.0 license.},
      abstract     = {The Hollow Electron Lens (HEL) was proposed to actively
                      remove the beam halo of the proton beam for the HL-LHC
                      upgrade. Currently, the concept of generating such an
                      electron beam is being tested in a dedicated Electron Beam
                      Test Stand (EBTS) at CERN. It currently produces a hollow
                      electron beam with 7 keV energy and 0.4 A current 25 us
                      pulsed with 2 Hz which will be confined in a strong solenoid
                      field. A gas curtain-based beam profile monitor was
                      developed to characterize the beam non-invasively during
                      operation. It injects a directional gas sheet at 45 degrees
                      to interact with the electron beam. Gas particles are
                      excited and emit fluorescent photons which are collected by
                      an intensified camera system. This allows the reconstruction
                      of the profile of the hollow electron beam. This
                      contribution presents the design of the monitor and
                      discusses the initial results obtained with a hollow
                      electron beam at the EBTS.},
      month         = {May},
      date          = {2023-05-07},
      organization  = {14th International Particle
                       Accelerator Conference, Venice (Italy),
                       7 May 2023 - 12 May 2023},
      keywords     = {Accelerator Physics (Other) /
                      mc6-beam-instrumentation-controls-feedback-and-operational-aspects
                      - MC6: Beam Instrumentation, Controls, Feedback and
                      Operational Aspects (Other) /
                      mc6-t03-beam-diagnostics-and-instrumentation - MC6.T03: Beam
                      Diagnostics and Instrumentation (Other)},
      cin          = {BEA},
      cid          = {I:(DE-Ds200)BEA-20051214OR061},
      pnm          = {899 - ohne Topic (POF4-899)},
      pid          = {G:(DE-HGF)POF4-899},
      experiment   = {$EXP:(DE-Ds200)no_experiment-20200803$},
      typ          = {PUB:(DE-HGF)8},
      doi          = {10.18429/JACOW-IPAC2023-THPL066},
      url          = {https://repository.gsi.de/record/357735},
}