Status of the TORCH time-of-flight project

N. Harnew; S. Bhasin; T. Blake; N. H. Brook; T. Conneely; D. Cussans; M. van Dijk; R. Forty; C. Frei; E. P.M. Gabriel; R. Gao; T. J. Gershon; T. Gys; T. Hadavizadeh; T. H. Hancock; M. Kreps; J. Milnes; D. Piedigrossi; J. Rademacker

doi:10.1016/j.nima.2018.12.007

Status of the TORCH time-of-flight project

N. Harnew, S. Bhasin, T. Blake, N. H. Brook, T. Conneely, D. Cussans, M. van Dijk, R. Forty, C. Frei, E. P.M. Gabriel, R. Gao, T. J. Gershon, T. Gys, T. Hadavizadeh, T. H. Hancock, M. Kreps, J. Milnes, D. Piedigrossi, J. Rademacker

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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 × 53mm ² , 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.

Original language	English
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Early online date	7 Dec 2018
DOIs	https://doi.org/10.1016/j.nima.2018.12.007
Publication status	E-pub ahead of print - 7 Dec 2018

Keywords

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

ASJC Scopus subject areas

Nuclear and High Energy Physics
Instrumentation

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Harnew, N., Bhasin, S., Blake, T., Brook, N. H., Conneely, T., Cussans, D., van Dijk, M., Forty, R., Frei, C., Gabriel, E. P. M., Gao, R., Gershon, T. J., Gys, T., Hadavizadeh, T., Hancock, T. H., Kreps, M., Milnes, J., Piedigrossi, D., & Rademacker, J. (2018). Status of the TORCH time-of-flight project. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. Advance online publication. https://doi.org/10.1016/j.nima.2018.12.007

Harnew, N, Bhasin, S, Blake, T, Brook, NH, Conneely, T, Cussans, D, van Dijk, M, Forty, R, Frei, C, Gabriel, EPM, Gao, R, Gershon, TJ, Gys, T, Hadavizadeh, T, Hancock, TH, Kreps, M, Milnes, J, Piedigrossi, D & Rademacker, J 2018, 'Status of the TORCH time-of-flight project', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. https://doi.org/10.1016/j.nima.2018.12.007

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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 × 53mm 2 , 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. ",

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AU - Harnew, N.

AU - Bhasin, S.

AU - Blake, T.

AU - Brook, N. H.

AU - Conneely, T.

AU - Cussans, D.

AU - van Dijk, M.

AU - Forty, R.

AU - Frei, C.

AU - Gabriel, E. P.M.

AU - Gao, R.

AU - Gershon, T. J.

AU - Gys, T.

AU - Hadavizadeh, T.

AU - Hancock, T. H.

AU - Kreps, M.

AU - Milnes, J.

AU - Piedigrossi, D.

AU - Rademacker, J.

PY - 2018/12/7

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KW - Micro-channel plate photomultipliers

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Status of the TORCH time-of-flight project

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