Test-beam studies of a small-scale TORCH time-of-flight demonstrator

被引:2
作者
Bhasin, S. [2 ,5 ]
Blake, T. [3 ]
Brook, N. [5 ]
Conneely, T. [8 ]
Cussans, D. [2 ]
Forty, R. [6 ]
Frei, C. [6 ]
Gabriel, E. P. M. [4 ]
Gao, R. [1 ]
Gershon, T. [3 ]
Gys, T. [6 ]
Hadavizadeh, T. [1 ]
Hancock, T. H. [1 ]
Harnew, N. [1 ]
Kreps, M. [3 ]
Milnes, J. [8 ]
Piedigrossi, D. [6 ]
Rademacker, J. [2 ]
van Dijk, M. [7 ]
机构
[1] Univ Oxford, Denys Wilkinson Lab, Keble Rd, Oxford OX1 3RH, England
[2] Univ Bristol, HH Wills Phys Lab, Tyndall Ave, Bristol BS8 1TL, Avon, England
[3] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England
[4] Univ Edinburgh, Sch Phys & Astron, James Clerk Maxwell Bldg, Edinburgh EH9 3FD, Midlothian, Scotland
[5] Univ Bath, Bath BA2 7AY, Avon, England
[6] CERN, EP Dept, CH-1211 Geneva 23, Switzerland
[7] CERN, EN Dept, CH-1211 Geneva 23, Switzerland
[8] Photek Ltd, 26 Castleham Rd, E Sussex, NS, England
基金
欧洲研究理事会;
关键词
Time-of-flight; Particle identification; Cherenkov radiation; Micro-channel plate photo-multiplier tubes; LHCb upgrade; IDENTIFICATION; SYSTEM;
D O I
10.1016/j.nima.2020.163671
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
TORCH is a time-of-flight detector designed to perform particle identification over the momentum range 2-10 GeV/c for a 10 m flight path. The detector exploits prompt Cherenkov light produced by charged particles traversing a quartz plate of 10 mm thickness. Photons are then trapped by total internal reflection and directed onto a detector plane instrumented with customised position-sensitive Micro-Channel Plate Photo-Multiplier Tube (MCP-PMT) detectors. A single-photon timing resolution of 70 ps is targeted to achieve the desired separation of pions and kaons, with an expectation of around 30 detected photons per track. Studies of the performance of a small-scale TORCH demonstrator with a radiator of dimensions 120x350x10 mm(3) have been performed in two test-beam campaigns during November 2017 and June 2018. Single-photon time resolutions ranging from 104.3 ps to 114.8 ps and 83.8 ps to 112.7 ps have been achieved for MCP-PMTs with granularity 4 x 64 and 8 x 64 pixels, respectively. Photon yields are measured to be within similar to 10% and similar to 30% of simulation, respectively. Finally, the outlook for future work with planned improvements is presented.
引用
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页数:7
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