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Status of the TORCH time-of-flight project

Research output: Contribution to journalArticle

Original languageEnglish
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Early online date7 Dec 2018
DOIs
DateAccepted/In press - 1 Dec 2018
DateE-pub ahead of print (current) - 7 Dec 2018

Abstract

TORCH is a time-of-flight detector, designed to provide charged π∕K particle identification up to a momentum of 10GeV/c for a 10m flight path. To achieve this level of performance, a time resolution of 15 ps per incident particle is required. TORCH uses a plane of quartz of 1 cm thickness as a source of Cherenkov photons, which are then focussed onto square Micro-Channel Plate Photomultipliers (MCP-PMTs) of active area 53 × 53mm2, segmented into 8 × 128 pixels equivalent. A small-scale TORCH demonstrator with a customised MCP-PMT and associated readout electronics has been successfully operated in a 5GeV/c mixed pion/proton beam at the CERN PS facility. Preliminary results indicate that a single-photon resolution better than 100ps can be achieved. The expected performance of a full-scale TORCH detector for the Upgrade II of the LHCb experiment is also discussed.

    Research areas

  • Cherenkov radiation, LHCb upgrade, Micro-channel plate photomultipliers, Particle identification, Time-of-flight

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    Rights statement: This is the final published version of the article (version of record). It first appeared online via Elsevier at https://doi.org/10.1016/j.nima.2018.12.007 . Please refer to any applicable terms of use of the publisher.

    Final published version, 983 KB, PDF document

    Licence: CC BY

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