Report number
| arXiv:2209.13379 |
Title
| Performance of a prototype TORCH time-of-flight detector |
Author(s)
|
Bhasin, S. (Bristol U. ; Bath U.) ; Blake, T. (Warwick U.) ; Brook, N.H. (Bath U.) ; Cicala, M.F. (Warwick U.) ; Conneely, T. (Astrium Ltd., Stevenage) ; Cussans, D. (Bristol U.) ; van Dijk, M.W.U. (CERN) ; Forty, R. (CERN) ; Frei, C. (CERN) ; Gabriel, E.P.M. (Edinburgh U., Inst. Astron.) ; Gao, R. (Oxford U.) ; Gershon, T. (Warwick U.) ; Gys, T. (CERN) ; Hadavizadeh, T. (Oxford U.) ; Hancock, T.H. (Oxford U.) ; Harnew, N. (Oxford U.) ; Jones, T. (Warwick U.) ; Kreps, M. (Warwick U.) ; Milnes, J. (Astrium Ltd., Stevenage) ; Piedigrossi, D. (CERN) ; Rademacker, J. (Bristol U.) ; Smallwood, J.C. (Oxford U.) Show all 22 authors |
Publication
| 2023-03-06 |
Imprint
| 2022-09-27 |
Number of pages
| 19 |
Note
| 18 pages, 16 figures, to be published in Nucl. Instrum. Methods A.
During review, clarity added to description throughout; updated figures 15
and 16; revised argument in section 6.3 |
In:
| Nucl. Instrum. Methods Phys. Res., A 1050 (2023) 168181 |
DOI
| 10.1016/j.nima.2023.168181 (publication)
|
Subject category
| hep-ex ; Particle Physics - Experiment ; physics.ins-det ; Detectors and Experimental Techniques |
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 10mm 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. |
Copyright/License
| preprint: (License: CC BY 4.0) publication: © 2023-2024 The Author(s) (License: CC BY 4.0) |