Development and commissioning of the Timing Counter for the MEG Experiment

Abstract

The Timing Counter of the MEG (Mu to Electron Gamma) experiment is designed to deliver trigger information and to accurately measure the timing of the $e^{+}$ in searching for the decay ${\mu }^{+}\to e^{+}\gamma$. It is part of a magnetic spectrometer with the ${\mu }^{+}$ decay target in the center. It consists of two sectors upstream and downstream the target, each one with two layers: the inner one made with scintillating fibers read out by APDs for trigger and track reconstruction, the outer one consisting in scintillating bars read out by PMTs for trigger and time measurement. The design criteria, the obtained performances and the commissioning of the detector are presented herein.

10 pages, 20 figures. Presented at the IEEE Nuclear Science Symposium 2010, Knoxville, TN, USA. Accepted by IEEE Transaction on Nuclear Science

References in corpus (4)

• New limit on the lepton-flavour violating decay mu -> e gamma
• A limit for the mu -> e gamma decay from the MEG experiment
• The MEG Spectrometer at PSI
• The Timing Counter of the MEG experiment: calibration and performance

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• Muon polarization in the MEG experiment: predictions and measurements
• Behaviour in Magnetic Fields of Fast Conventional and Fine-Mesh Photomultipliers
• Time resolution of time-of-flight detector based on multiple scintillation counters readout by SiPMs
• Design and test of an extremely high resolution Timing Counter for the MEG II experiment: preliminary results
• The MEGII detector
• Radiation Hardness tests with neutron flux on different Silicon photomultiplier devices