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16-19 January 2018
Zurich, Switzerland
Europe/Berlin timezone

Modular telescope based on scintillating fibres coupled with low noise silicon photomultipliers

17 Jan 2018, 17:05
ETH HG E 1.2 (Zurich, Switzerland)

ETH HG E 1.2

Zurich, Switzerland

Rämistrasse 101, 8092 Zürich, Schweiz


Mr Olivier Girard (EPFL, Lausanne, Switzerland)


A modular telescope composed of four X/Y scintillating fibre tracking stations has been developed and employed to test the LHCb-SciFi 2.5m long modules. The fibres are read out by silicon photomultiplier arrays characterised by a low correlated noise, high photodetection efficiency and very good stability on a wide operational range. A single hit spatial resolution smaller than 40um was measured during the testbeam campaign performed this fall on secondary particle beam at the CERN North Area, with the resolution on the track at the position of the DUT estimated to be 16um. The hit efficiency was measured to be ~99%. Two main optimisation directions are being considered: to introduce timing measurement with time resolution of ~1ns, based on the fast signal coming from the SiPMs and limited only by the decay time of the fibre scintillator, and the possibility to increase the active surface allowing large area DUTs. This contribution will describe the results on the performances obtained with the current configuration and cover the main ongoing developments.

Primary author

Mr Olivier Girard (EPFL, Lausanne, Switzerland)


Mr Axel Kuonen (EPFL, Lausanne, Switzerland) Dr Haefeli Guido (EPFL, Lausanne, Switzerland) Dr Maria Elena Stramaglia (EPFL, Lausanne, Switzerland)

Presentation Materials