2 research outputs found
Calorimeters for the FCC-hh
The future proton-proton collider (FCC-hh) will deliver collisions at a
center of mass energy up to TeV at an unprecedented
instantaneous luminosity of cms, resulting in
extremely challenging radiation and luminosity conditions. By delivering an
integrated luminosity of few tens of ab, the FCC-hh will provide an
unrivalled discovery potential for new physics. Requiring high sensitivity for
resonant searches at masses up to tens of TeV imposes strong constraints on the
design of the calorimeters. Resonant searches in final states containing jets,
taus and electrons require both excellent energy resolution at multi-TeV
energies as well as outstanding ability to resolve highly collimated decay
products resulting from extreme boosts. In addition, the FCC-hh provides the
unique opportunity to precisely measure the Higgs self-coupling in the
di-photon and b-jets channel. Excellent photon and jet energy resolution at low
energies as well as excellent angular resolution for pion background rejection
are required in this challenging environment. This report describes the
calorimeter studies for a multi-purpose detector at the FCC-hh. The calorimeter
active components consist of Liquid Argon, scintillating plastic tiles and
Monolithic Active Pixel Sensors technologies. The technological choices, design
considerations and achieved performances in full Geant4 simulations are
discussed and presented. The simulation studies are focused on the evaluation
of the concepts. Standalone studies under laboratory conditions as well as
first tests in realistic FCC-hh environment, including pileup rejection
capabilities by making use of fast signals and high granularity, have been
performed. These studies have been performed within the context of the
preparation of the FCC conceptual design reports (CDRs)
Light response study of FCC-hh plastic-scintillator tiles with SiPM readout
In this study light yield measurements of scintillating plastic tiles for cosmic muons were preformed. The setup is comprised of plastic-scintillator tiles, wavelengthshifting fibers and Silicon photomultipliers (SiPMs). The measurement setups are designed to represent the conditions at the first and last layer of the FCC-hh hadronic calorimeter as proposed in [1]. The key SiPM parameters, gain and dark count rate, were measured using a full pulse-height spectrum analysis. Optimization tests concerning the wrapping material of the plastic-scintillator tiles were performed, whereby the maximum measured light yield is 7.61(+0.38 -0.23) number-of-photoelectrons per Minimum Ionizing Particle (Npe/MIP)