TY  - JOUR
AU  - Brook, N. H.
AU  - Castillo Garcia, L.
AU  - Conneely, T. M.
AU  - Cussans, D.
AU  - van Dijk, M. W. U.
AU  - Fohl, K.
AU  - Forty, R.
AU  - Frei, C.
AU  - Gao, R.
AU  - Gys, T.
AU  - Hancock, T. H.
AU  - Harnew, N.
AU  - Lapington, J.
AU  - Milnes, J.
AU  - Piedigrossi, D.
AU  - Rademacker, J.
AU  - Ros Garcia, A.
PY  - 2018
DA  - 2018//
TI  - Testbeam studies of a TORCH prototype detector
T2  - Nucl. Instrum. Methods Phys. Res. A
JO  - Nuclear Instruments & Methods in Physics Research A
SP  - 256
EP  - 268
VL  - 908
PB  - Elsevier Science Bv
KW  - Cherenkov radiation
KW  - Particle identification
KW  - TORCH
KW  - MCP-PMT
AB  - 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.
SN  - 0168-9002
UR  - http://arxiv.org/abs/1805.04849
UR  - https://doi.org/10.1016/j.nima.2018.07.023
DO  - 10.1016/j.nima.2018.07.023
LA  - English
N1  - WOS:000446864600033
ID  - Brook_etal2018
ER  -