Details

Autor(en) / Beteiligte

• 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.
• Piedigrossi, D.
• Rademacker, J.
• Smallwood, J.C.

Titel

Performance of a prototype TORCH time-of-flight detector

Ist Teil von

• Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 2023-05, Vol.1050, p.168181, Article 168181

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.