28 July 2020 to 6 August 2020
virtual conference
Europe/Prague timezone

Test-beam performance of a TORCH prototype module

28 Jul 2020, 18:15
virtual conference

virtual conference

Talk 13. Detectors for Future Facilities (incl. HL-LHC), R&D, Novel Techniques Detectors for Future Facilities (incl. HL-LHC), R&D, Novel Techniques


Michal Kreps (University of Warwick (GB))


The TORCH time-of-flight detector is designed to provide a 15 ps timing resolution for charged particles, resulting in K/pi (p/K) particle identification up to 10 (15) GeV/c momentum over a 10 m flight path. Cherenkov photons, produced in a quartz plate of 10 mm thickness, are focused onto an array of micro-channel plate photomultipliers (MCP-PMTs) which measure the photon arrival times and spatial positions. A half-scale (660 x 1250 x 10 mm^3) TORCH demonstrator module instrumented with customised MCP_PMTs has been tested in a 5 GeV/c mixed proton-pion beam at the CERN PS. The MCP-PMTs with the active area 53 x 53 mm^2 and granularity 64 x 8 pixels have been developed in collaboration with an industrial partner (Photek). With 30 photons per particle detected, the 15 ps per particle time resolution requires single-photon resolution of 70 ps. The timing performance and photon yields have been measured as a function of beam position in the radiator, giving measurements which are consistent with expectations. A possible TORCH design of the particle identification system in the LHCb experiment has been simulated and the potential for particle identification performance for high luminosity running has been evaluated.

Primary authors

Michal Kreps (University of Warwick (GB)) Srishti Bhasin (University of Bristol (GB)) Thomas Blake (University of Warwick) Nicholas BROOK (BRISTOL) Flavia Cicala (University of Warwick (GB)) Thomas Conneely (Photek LTD) David Cussans (University of Bristol (GB)) Roger Forty (CERN) Christoph Frei (CERN) Emmy Pauline Maria Gabriel (The University of Edinburgh (GB)) Rui Gao (University of Oxford (GB)) Timothy Gershon (University of Warwick (GB)) Thierry Gys (CERN) Thomas Henry Hancock (University of Oxford (GB)) Neville Harnew (University of Oxford (GB)) James Milnes (Photek Ltd) Jonas Rademacker (University of Bristol (GB)) Maarten Van Dijk (CERN)

Presentation Materials