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@TECHREPORT{Hofmann:864811,
      author       = {Hofmann, M. W.},
      title        = {{T}est und {S}imulation von {D}etektorkomponenten des
                      {ASPIRIN}-{D}etektors am {E}xperiment {ATRAP}},
      volume       = {3572},
      number       = {Juel-3572},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich, Zentralbibliothek, Verlag},
      reportid     = {FZJ-2019-04467, Juel-3572},
      series       = {Berichte des Forschungszentrums Jülich},
      pages        = {II, 93 p.},
      year         = {1998},
      abstract     = {Goal of the ATRAP - Experiment is to capture the simplest
                      atoms of antimatter, the Anti-Hydrogen-Atom
                      $\overline{H}^{0}$ in a trap, where it can be cooled and
                      detected in order to perform high precision optical
                      spectroscopy. Subject of this work are studies in
                      preparation of the construction of the ASPIRIN-Detector
                      being a realtime imaging Antihydrogen Annihilation Detector
                      in the ATRAP - Experiment. Monte-Carlo-Simulations were
                      performed in order to optimize efficiency and spatial
                      resolution. Main part of the detector will be a cylindrical
                      fibre hodoscope, consisting of several layers of differently
                      oriented fibres allowing spatial resolution. Light output
                      and attenuation length of the fibres were measured and the
                      influence of low temperature was tested. 16-channel
                      multi-anode photomultipliers for the fibre readout were
                      tested, focussing an gain, crosstalk and dank counts. The
                      perfomance of the tubes in magnetic field was studied. The
                      following conclusions are drawn: The material between the
                      annihilation point and the ASPIRIN-Detector should not
                      exceed 3 mm copper, in order to maintain a satisfying
                      spatial resolution. Scintillation does not freeze out under
                      liquid - Helium - temperature, hence scintillating fibres
                      are suitable for the Experiment. The fibres should not guide
                      the light more then 1,5 m since the average attenuation
                      length is of this order. The Photomultiplier tube H6568 of
                      the manufacturer Hamamatsu is capable for the readout of the
                      fibres, but raust be coated with magnetic shielding reducing
                      the field to values below 10G.},
      cin          = {PRE-2000},
      cid          = {I:(DE-Juel1)PRE2000-20140101},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)29},
      url          = {https://juser.fz-juelich.de/record/864811},
}