Scintillating fibre detector for the Mu3e experiment. (6th July 2017)

• Record Type: Journal Article
• Authors: Bravar, S.; Corrodi, S.; Damyanova, A.; Grab, C.; Gredig, R.; Papa, A.; Rutar, G.
• Is Part Of: Journal of instrumentation. Volume 12:Number 7(2017:Jul.)
• Page Start: C07011
• Page End: C07011
• Publication Date: 2017-07-06
• Subjects: Detector design and construction technologies and materials -- Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators) -- Timing detectors -- Electronic detector readout concepts (solid-state); Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/12/07/C07011
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: Mu3e is a dedicated experiment to search for the rare lepton flavour violating decay μ + → e + e − e + . Its ultimate goal is to find or exclude this process with a sensitivity of one in 10 16 muon decays. This constitutes four orders of magnitude improvement with respect to the current state-of-the art. A thin multi-layer scintillating fibre detector consisting of 250μm fibres read out on both sides with silicon photomultiplier arrays provides an excellent time measurement with σ<500ps in order to reject combinatorial background at a muon stopping rate around 10 8 muon/s, concurrently minimizing the material budget to X / X 0 <0.3% . The design, performance and readout concept, including the dedicated readout chip MuTRiG, is presented.