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@INPROCEEDINGS{Lohmann:490729,
      author       = {Lohmann, Wolfgang},
      collaboration = {{FCAL Collaboration}},
      title        = {${R}\&{D}$ for lumionometers at $e^+ e^-$ colliders},
      reportid     = {PUBDB-2022-07959},
      year         = {2022},
      abstract     = {A design is presented for the instrumentation of the very
                      forward region in future detectors at $e^+ e^-$ collider to
                      perform a fast estimate and precise measurement of the
                      luminosity, to improve the hermeticity and mask the central
                      tracking detectors from backscattered particles. Two compact
                      calorimeters are foreseen, LumiCal and BeamCal. Both are
                      designed as sandwich calorimeters with very thin sensor
                      planes to keep the Molière radius small, facilitating such
                      the measurement of electron showers in the presence of
                      background. Silicon sensor prototypes and dedicated FE ASICs
                      have been developed and produced. In recent beam tests, a
                      multi-plane compact prototype was equipped with thin sensor
                      planes, installed in 1 mm gaps between tungsten plates of
                      one radiation length thickness, and fully assembled with
                      readout electronics. The latest status of the calorimeter
                      prototype development will be presented, including selected
                      performance results, obtained in a 5 GeV electron beam at
                      DESY, and compared the expected performance obtained from
                      simulation.},
      month         = {May},
      date          = {2022-05-30},
      organization  = {Future Circular Collider week 2022,
                       Paris (France), 30 May 2022 - 3 Jun
                       2022},
      cin          = {ZEU-EXP/AT},
      cid          = {$I:(DE-H253)ZEU-EXP_AT-20120731$},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611)},
      pid          = {G:(DE-HGF)POF4-611},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://bib-pubdb1.desy.de/record/490729},
}