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@MASTERSTHESIS{Chaudhry:449740,
      author       = {Chaudhry, Nayab Majid},
      othercontributors = {Gallo-Voss, Elisabetta and Guthoff, Moritz},
      title        = {{P}recision metrology measurements for the {CMS} phase-2
                      {T}racker upgrade},
      school       = {University of Hamburg},
      type         = {Bachelorarbeit},
      reportid     = {PUBDB-2020-03978},
      pages        = {57},
      year         = {2020},
      note         = {Bachelorarbeit, University of Hamburg, 2020},
      abstract     = {The LHC, along with all of its experiments, is going
                      through an upgrade. The currentLHC, designed for an
                      integrated luminosity of 300 fb$^{-1}$ , will be upgraded to
                      the HighLuminosity LHC (HL-LHC), providing an increased
                      collision rate and will deliver morethan 3000 fb$^{-1}$
                      luminosity. All LHC experiments will undergo an upgrade to
                      cope withthe increased luminosity. For the upgrade of the
                      CMS new endcaps have to be designedand built. The main
                      mechanical element of the endcaps will be the half disks
                      with embeddedcooling pipes and detector module positioning
                      inserts. A prototype of a part ofthe endcap half disk has
                      been built and is being studied. During the course of this
                      thesis,measurements were carried out on the prototype to
                      check the precision of various mechanicalelements such a
                      reference inserts or the module inserts, which will be used
                      toposition the detector modules. The measurements were
                      carried out with the metrologyarm made specifically for
                      precision measurements. In order to check the accuracy of
                      thearm different studies were carried out such as the
                      calibration of the probes and the influenceof the movement
                      of the metrology arm with respect to the object. The result
                      ofthe measurement of the prototype demonstrated the cause of
                      a misalignment of inserts,however almost all positions were
                      within specification.},
      cin          = {CMS},
      cid          = {I:(DE-H253)CMS-20120731},
      pnm          = {632 - Detector technology and systems (POF3-632)},
      pid          = {G:(DE-HGF)POF3-632},
      experiment   = {EXP:(DE-H253)LHC-Exp-CMS-20150101},
      typ          = {PUB:(DE-HGF)2},
      doi          = {10.3204/PUBDB-2020-03978},
      url          = {https://bib-pubdb1.desy.de/record/449740},
}