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DTSTART:20180325T010000
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DTSTART:20181028T010000
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DTSTART;TZID=Europe/Rome:20180322T114000
DTEND;TZID=Europe/Rome:20180322T123000
DTSTAMP:20260508T205324
CREATED:20180406T051337Z
LAST-MODIFIED:20240513T100832Z
UID:10559-1521718800-1521721800@w3.lnf.infn.it
SUMMARY:Gas detectors: general principles
DESCRIPTION:Calorimetry in high-energy physics is rapidly evolving\, with new specifications (e.g. higher energies\, enormous particle densities) and a wide variety of technologies\, both for signal creation and detection. Advances in large-area highly-segmented detectors based on\, for example\, silicon and scintillators\, are providing possibilities for high-granularity calorimetry\, providing unprecedented levels of information from particle showers. This talk focuses on one example of high-granularity calorimetry: The CMS HGCAL\, being designed to replace the existing endcap calorimeters for the HL-LHC era. It is a sampling calorimeter\, featuring unprecedented transverse and longitudinal readout segmentation for both electromagnetic (CE-E) and hadronic (CE-H) compartments. This will facilitate particle-flow calorimetry\, where the fine structure of showers can be measured and used to enhance pileup rejection and particle identification\, whilst still achieving good energy resolution. The CE-E and a large fraction of CE-H will use silicon as active detector material. The sensors will be of hexagonal shape\, maximizing the available 8-inch circular wafer area. The lower-radiation environment will be instrumented with scintillator tiles with on-tile SiPM readout. This concept borrows heavily from designs produced by the CALICE collaboration – calorimetry for ILC etc. – but the challenges of such a detector at a hadron collider are considerably larger than at the ILC. In addition to the hardware aspects\, the reconstruction of signals – both online for triggering and offline – is a quantum leap from existing detectors. We present the ideas behind the HGCAL\, its current status including design and expected performance\, and the challenges ahead.
URL:/event/gas-detectors-general-principles-2/
LOCATION:Aula Salvini
CATEGORIES:Seminari Gruppo 1
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