Volume 364 - European Physical Society Conference on High Energy Physics (EPS-HEP2019) - Detector R&D and Data Handling
Status of the TORCH time-of-flight detector
T. Hadavizadeh,* S. Bhasin, T. Blake, N.H. Brook, M.F. Cicala, T. Conneely, D. Cussans, R. Forty, C. Frei, R. Gao, E. Gabriel, T. Gershon, T. Gys, T. Hancock, N. Harnew, M. Kreps, J. Milnes, D. Piedigrossi, J. Rademacker, M.W.U. Van Dijk
*corresponding author
Full text: Not available
Abstract
TORCH is a novel time-of-flight detector, designed to provide $\pi$/K particle identification up to 10$\,\text{GeV}/c$ momentum over a 10$\,$m flight path. Based on the DIRC principle, Cherenkov photons are produced in a quartz plate of 10$\,$mm thickness, where they propagate to the periphery of the plate by total-internal reflection. There the photons are focused onto an array of micro-channel plate photomultipliers (MCP-PMTs) which measure their arrival times and spatial positions. A time resolution of 70 ps per detected Cherenkov photon is expected, which results in a time-of-flight resolution of 15 ps, given typically 30 detected photons per track. For a future application, a full-scale TORCH detector has been proposed for the future LHCb upgrade, which comprises 18 modules with 198 MCP-PMTs. To demonstrate the TORCH principle, a half-height ($1250\times660\times10 \,\text{mm}^3$) prototype module has been tested in a 8$\,\text{GeV}/c$ mixed proton-pion beam at the CERN PS. Customised $53\times53\,\text{mm}^2$ MCP-PMTs of effective granularity $128\times8$ pixels have been employed, which have been developed in collaboration with an industrial partner. The single-photon timing performance and photon yields have been measured and are close to specification, demonstrating the TORCH concept.
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access