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@ARTICLE{Krause:893876,
      author       = {Krause, Florian F. and Schowalter, Marco and Oppermann,
                      Oliver and Marquardt, Dennis and Müller-Caspary, Knut and
                      Ritz, Robert and Simson, Martin and Ryll, Henning and Huth,
                      Martin and Soltau, Heike and Rosenauer, Andreas},
      title        = {{P}recise measurement of the electron beam current in a
                      {TEM}},
      journal      = {Ultramicroscopy},
      volume       = {223},
      issn         = {0304-3991},
      address      = {Amsterdam},
      publisher    = {Elsevier Science},
      reportid     = {FZJ-2021-02888},
      pages        = {113221 -},
      year         = {2021},
      note         = {Bitte Post-print ergänzen},
      abstract     = {Modern quantitative TEM methods such as the -factor
                      technique require precise knowledge of the electron beam
                      current. To this end, a macroscopic Faraday cup was designed
                      and constructed. It can replace the viewing screen in the
                      projection chamber of a TEM and guarantees highly accurate
                      measurement of the electron beam with precision only limited
                      by the used amperemeter. The easy to install, affordable
                      device is shown to be highly apt for precision measurement
                      of currents . The Faraday cup results are used for an
                      assessment and a comparison of various other beam current
                      measurement methods. It is found that the built-in screen
                      amperemeter of the used TEM is quite inaccurate and that
                      measurements using the screen in general tend to
                      underestimate the current. If present, the drift tube of a
                      spectrometer can also be used as a Faraday cup, but certain
                      described peculiarities have to be taken into account.
                      Direct ultrafast electron detection cameras allow precise
                      measurement at very small currents. For the electron
                      counting technique, which exploits single electron detection
                      capabilities of STEM detectors, a systematic current
                      underestimation was observed and investigated. This results
                      in a reformulated routine for the method and with these
                      improvements it is demonstrated to be capable of accurate
                      high-precision measurements for currents},
      cin          = {ER-C-1},
      ddc          = {570},
      cid          = {I:(DE-Juel1)ER-C-1-20170209},
      pnm          = {5351 - Platform for Correlative, In Situ and Operando
                      Characterization (POF4-535) / moreSTEM - Momentum-resolved
                      Scanning Transmission Electron Microscopy (VH-NG-1317)},
      pid          = {G:(DE-HGF)POF4-5351 / G:(DE-HGF)VH-NG-1317},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {33588232},
      UT           = {WOS:000632279200008},
      doi          = {10.1016/j.ultramic.2021.113221},
      url          = {https://juser.fz-juelich.de/record/893876},
}