The Timing Counter of the MEG experiment: calibration and performance

Details The Timing Counter of the MEG experiment: calibration and performance The Timing Counter of the MEG experiment: calibration and performance

2011-04-06

arxiv.org/abs/1104.1035v1

Nucl.Phys.Proc.Suppl.215:281-283,2011

Physics

Instrumentation and Detectors

Presented at the 12th Topical Seminar on Innovative Particle and Radiation Detectors (IPRD10) 7 - 10 June 2010, Siena. Accepte

Scientific paper

10.1016/j.nuclphysbps.2011.04.03

The MEG detector is designed to test Lepton Flavor Violation in the $\mu^+\rightarrow e^+\gamma$ decay down to a Branching Ratio of a few $10^{-13}$. The decay topology consists in the coincident emission of a monochromatic photon in direction opposite to a monochromatic positron. A precise measurement of the relative time $t_{e^+\gamma}$ is crucial to suppress the background. The Timing Counter (TC) is designed to precisely measure the time of arrival of the $e^+$ and to provide information to the trigger system. It consists of two sectors up and down stream the decay target, each consisting of two layers. The outer one made of scintillating bars and the inner one of scintillating fibers. Their design criteria and performances are described.

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