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@ARTICLE{Schnhense:472792,
      author       = {Schönhense, G. and Medjanik, K. and Fedchenko, O. and
                      Zymakova, Anna and Chernov, S. and Kutnyakhov, Dmytro and
                      Vasilyev, D. and Babenkov, S. and Elmers, H. J. and
                      Baumgärtel, P. and Goslawski, P. and Öhrwall, G. and
                      Grunske, T. and Kauerhof, T. and von Volkmann, K. and
                      Kallmayer, M. and Ellguth, M. and Oelsner, A.},
      title        = {{T}ime-of-flight photoelectron momentum microscopy with
                      80–500 {MH}z photon sources: electron-optical pulse picker
                      or bandpass pre-filter},
      journal      = {Journal of synchrotron radiation},
      volume       = {28},
      number       = {6},
      issn         = {0909-0495},
      address      = {[S.l.]},
      publisher    = {Wiley-Blackwell},
      reportid     = {PUBDB-2021-05248},
      pages        = {1891 - 1908},
      year         = {2021},
      abstract     = {The small time gaps of synchrotron radiation in
                      conventional multi-bunch mode (100-500 MHz) or laser-based
                      sources with high pulse rate (similar to 80 MHz) are
                      prohibitive for time-of-flight (ToF) based photoelectron
                      spectroscopy. Detectors with time resolution in the 100ps
                      range yield only 20-100 resolved time slices within the
                      small time gap. Here we present two techniques of
                      implementing efficient ToF recording at sources with high
                      repetition rate. A fast electron-optical beam blanking unit
                      with GHz bandwidth, integrated in a photoelectron momentum
                      microscope, allows electron-optical 'pulse-picking' with any
                      desired repetition period. Aberration-free momentum
                      distributions have been recorded at reduced pulse periods of
                      5 MHz (at MAXII) and 1.25 MHz (at BESSYII). The approach is
                      compared with two alternative solutions: a bandpass
                      pre-filter (here a hemispherical analyzer) or a parasitic
                      four-bunch island-orbit pulse train, coexisting with the
                      multi-bunch pattern on the main orbit. Chopping in the time
                      domain or bandpass pre-selection in the energy domain can
                      both enable efficient ToF spectroscopy and photoelectron
                      momentum microscopy at 100-500 MHz synchrotrons, highly
                      repetitive lasers or cavity-enhanced high-harmonic sources.
                      The high photon flux of a UV-laser (80 MHz, <1 meV
                      bandwidth) facilitates momentum microscopy with an energy
                      resolution of 4.2 meV and an analyzed region-of-interest
                      (ROI) down to < 800 nm. In this novel approach to `sub-mu
                      m-ARPES' the ROI is defined by a small field aperture in an
                      intermediate Gaussian image, regardless of the size of the
                      photon spot.},
      cin          = {DOOR ; HAS-User},
      ddc          = {550},
      cid          = {I:(DE-H253)HAS-User-20120731},
      pnm          = {6G3 - PETRA III (DESY) (POF4-6G3)},
      pid          = {G:(DE-HGF)POF4-6G3},
      experiment   = {EXP:(DE-H253)P-P04-20150101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {34738944},
      UT           = {WOS:000715906300024},
      doi          = {10.1107/S1600577521010511},
      url          = {https://bib-pubdb1.desy.de/record/472792},
}