%0 Journal Article
%T Testbeam studies of a TORCH prototype detector
%A Brook, N. H.
%A Castillo Garcia, L.
%A Conneely, T. M.
%A Cussans, D.
%A van Dijk, M. W. U.
%A Fohl, K.
%A Forty, R.
%A Frei, C.
%A Gao, R.
%A Gys, T.
%A Hancock, T. H.
%A Harnew, N.
%A Lapington, J.
%A Milnes, J.
%A Piedigrossi, D.
%A Rademacker, J.
%A Ros Garcia, A.
%J Nuclear Instruments & Methods in Physics Research A
%D 2018
%V 908
%I Elsevier Science Bv
%@ 0168-9002
%G English
%F Brook_etal2018
%O WOS:000446864600033
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=3760), last updated on Mon, 22 Oct 2018 14:18:33 +0000
%X 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 x 1250 x 10 mm(3)), which is currently under construction.
%K Cherenkov radiation
%K Particle identification
%K TORCH
%K MCP-PMT
%R 10.1016/j.nima.2018.07.023
%U http://arxiv.org/abs/1805.04849
%U https://doi.org/10.1016/j.nima.2018.07.023
%P 256-268