The Timing Counter of the MEG experiment: calibration and performance

✍ Scribed by P.W. Cattaneo; M. De Gerone; S. Dussoni; F. Gatti; M. Rossella; Y. Uchiyama; R. Valle

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 354 KB
• Volume: 215
• Category: Article
• ISSN: 0920-5632
• DOI: 10.1016/j.nuclphysbps.2011.04.031

✦ Synopsis

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 t e + 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.