1. Performance of a prototype TORCH time-of-flight detector.
- Author
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Bhasin, S., Blake, T., Brook, N.H., Cicala, M.F., Conneely, T., Cussans, D., van Dijk, M.W.U., Forty, R., Frei, C., Gabriel, E.P.M., Gao, R., Gershon, T., Gys, T., Hadavizadeh, T., Hancock, T.H., Harnew, N., Jones, T., Kreps, M., Milnes, J., and Piedigrossi, D.
- Subjects
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MICROCHANNEL plates , *PHOTOMULTIPLIERS , *QUARTZ crystals , *CHERENKOV radiation , *DETECTORS , *TORCHES , *PROTOTYPES , *NEUTRINO detectors - Abstract
TORCH is a novel time-of-flight detector, designed to provide charged particle identification of pions, kaons and protons in the momentum range 2–20 GeV/ c over a 9.5 m flight path. A detector module, comprising a 10 mm thick quartz plate, provides a source of Cherenkov photons which propagate via total internal reflection to one end of the plate. Here, the photons are focused onto an array of custom-designed Micro-Channel Plate Photo-Multiplier Tubes (MCP-PMTs) which measure their positions and arrival times. The target time resolution per photon is 70 ps which, for 30 detected photons per charged particle, results in a 10 – 15 ps time-of-flight resolution. A 1.25 m length TORCH prototype module employing two MCP-PMTs has been developed, and tested at the CERN PS using a charged hadron beam of 8 GeV/ c momentum. The construction of the module, the properties of the MCP-PMTs and the readout electronics are described. Measurements of the collected photon yields and single-photon time resolutions have been performed as a function of particle entry points on the plate and compared to expectations. These studies show that the performance of the TORCH prototype approaches the design goals for the full-scale detector. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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