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Author(s)
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Blake, T (Warwick U.) ; Cicala, F (Warwick U.) ; Conneely, T (Unlisted, UK) ; Cussans, D (Bristol U.) ; Davidson, A (Warwick U.) ; Frei, C (CERN) ; Forty, R (CERN) ; Gao, R (Oxford U.) ; Gershon, T (Warwick U.) ; Gys, T (CERN) ; Hadavizadeh, T (Monash U.) ; Hancock, T (Oxford U.) ; Harnew, N (Oxford U.) ; Jones, T (Warwick U.) ; Korpar, S (Stefan Inst., Ljubljana) ; Kreps, M (Warwick U.) ; Lappington, J (Leicester U.) ; Lehuraux, M (Warwick U.) ; Lowe, A (Oxford U.) ; Milnes, J (Unlisted, UK) ; Pestonik, R (Stefan Inst., Ljubljana) ; Piedigrossi, D (CERN) ; Polyakov, I (CERN) ; Rademacker, J (Bristol U.) ; Trilov, S (Bristol U.) ; Tat, M (Oxford U.) ; Walton, E (Monash U.) ; Wilkinson, G (Oxford U.) ; York, A (Oxford U.) ; Zhu, L (Beijing, GUCAS) |
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Abstract
| The TORCH (Time Of internally Reflected Cherenkov light) detector is proposed for the high-luminosity UpgradeII of the LHCb experiment. The aim of TORCH is to measure time-of-flight with a 15ps resolution per charged-particle, providing particle identification over the momentum range 2–15GeV/c. TORCH is to be located approximately 9.5m downstream of the LHCb interaction point, and comprises 18 modules of highly-polished 1cm-thick quartz plates, each of 250×66cm2. Cherenkov photons, radiated in the quartz, are focused onto an array of fast-timing micro-channel-plate detectors (MCP-PMTs) that each have a pixelation of 8 × 64 within an active area of 5.3×5.3cm2. Test-beam studies have previously shown that a timing resolution better than 100ps per single photon can be achieved on a half-height module. Recent advances in the development of a 16 × 96 pixelated MCP-PMT are described. A full-height module is being developed with a light-weight carbon-fibre support structure. A novel exo-skeleton jigging system is used to bond the optical elements and support each module during installation. |