Please use this identifier to cite or link to this item: http://hdl.handle.net/2381/45156
Title: Testbeam studies of a TORCH prototype detector
Authors: Brook, NH
García, LC
Conneely, TM
Cussans, D
van Dijk, MWU
Föhl, K
Forty, R
Frei, C
Gao, R
Gys, T
Hancock, TH
Harnew, N
Lapington, J
Milnes, J
Piedigrossi, D
Rademacker, J
García, AR
First Published: 11-Jul-2018
Citation: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2018, 908, pp. 256-268
Abstract: TORCH is a novel time-of-flight detector that has been developed to provide charged-particle identification between 2 and 10 GeV/c momentum. TORCH combines arrival times from multiple Cherenkov photons produced within a 10 mm-thick quartz radiator plate, to achieve a 15 ps time-of-flight resolution per incident particle. A customised Micro-Channel Plate photomultiplier tube (MCP-PMT) and associated readout system utilises an innovative charge-sharing technique between adjacent pixels to obtain the necessary 70 ps time resolution of each Cherenkov photon. A five-year R&D programme has been undertaken, culminating in the construction of a small-scale prototype TORCH module. In testbeams at CERN, this prototype operated successfully with customised electronics and readout system. A full analysis chain has been developed to reconstruct the data and to calibrate the detector. Results are compared to those using a commercial Planacon MCP-PMT, and single photon resolutions approaching 80 ps have been achieved. The photon counting efficiency was found to be in reasonable agreement with a GEANT4 Monte Carlo simulation of the detector. The small-scale demonstrator is a precursor to a full-scale TORCH module (with a radiator plate of 660×1250×10mm3), which is currently under construction.
DOI Link: 10.1016/j.nima.2018.07.023
ISSN: 0168-9002
Links: https://www.sciencedirect.com/science/article/pii/S0168900218308556?via%3Dihub
http://hdl.handle.net/2381/45156
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © the authors, 2018. This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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