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@PHDTHESIS{Wysotzki:888686,
      author       = {Wysotzki, Christian},
      othercontributors = {Stahl, Achim and Wiebusch, Christopher},
      title        = {{D}evelopment and production of an intelligent {PMT}
                      readout system for {OSIRIS}},
      school       = {RWTH Aachen University},
      type         = {Dissertation},
      address      = {Aachen},
      publisher    = {RWTH Aachen University},
      reportid     = {RWTH-2023-00743},
      pages        = {1 Online-Ressource : Illustrationen, Diagramme},
      year         = {2023},
      note         = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
                      University; Dissertation, RWTH Aachen University, 2023},
      abstract     = {The Jiangmen Underground Neutrino Observatory (JUNO) is a
                      neutrino detector currently under construction in South
                      China. The experiment is built to contribute substantially
                      to central unsolved neutrino physics questions. Examples are
                      the determination of the neutrino mass ordering and
                      precision measurements of neutrino mixing angles. An
                      inalienable prerequisite for precise measurements is a high
                      radiopurity of the detector, especially of the liquid
                      scintillator. In order to investigate the radioactivity of
                      the liquid scintillator, the dedicated Online Scintillator
                      Internal Radioactivity Investigation System (OSIRIS) is
                      built. It uses photomultiplier tubes (PMTs) for the
                      detection of light caused by radioactive decays. A new
                      system is developed for OSIRIS which attaches the PMT
                      readout electronics directly at its back. This system
                      directly processes the digitized PMT signals and is
                      therefore denoted as intelligent PMT (iPMT).The design of
                      the iPMT system with a focus on the electronics is described
                      in detail. As part of this thesis, an FPGA design for the
                      PMT readout and the control of the iPMT is implemented and
                      tested. Furthermore, an FPGA design for the synchronization
                      of the iPMTs with each other and with calibration systems in
                      OSIRIS isdeveloped.Characterizing measurements with a focus
                      on central capabilities of the system are presented. This
                      includes properties of the readout chain and an evaluation
                      of the timing and synchronization system. An exemplary
                      evaluation of the performance with a PMT is presented.
                      Concluding, the electronics assembly of the iPMTs for OSIRIS
                      is described. Prior shipment to China, the iPMTs undergo
                      functional verification tests, and the corresponding results
                      are presented. In total, 75 iPMTs are successfully tested
                      for the use in OSIRIS.},
      cin          = {133510 / 130000},
      ddc          = {530},
      cid          = {$I:(DE-82)133510_20140620$ / $I:(DE-82)130000_20140620$},
      typ          = {PUB:(DE-HGF)11},
      doi          = {10.18154/RWTH-2023-00743},
      url          = {https://publications.rwth-aachen.de/record/888686},
}