The MEG detector is designed to test Lepton Flavor Violation in the μ+→e+γ 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 te+γ 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. © 2011 Elsevier B.V.
The timing counter of the MEG experiment: Calibration and performance
De Gerone, M.;Dussoni, S.;Gatti, F.;Valle, R.
2011-01-01
Abstract
The MEG detector is designed to test Lepton Flavor Violation in the μ+→e+γ 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 te+γ 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. © 2011 Elsevier B.V.
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