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Abstract: The MEG experiment is designed to search the Lepton Flavor Violating process$\mu \to e^+\gamma$ \cite{mori-1999,meg2007-baldini}. This search requires ahigh intensity muon beam stopping in a thin target with the maximum ratecompatible with the background from combinatorial events.The events are analyzed by a high resolution and fast liquid xenoncalorimeter and by a spectrometer composed by an array of ultra-light driftchambers DCH for momentum measurement and a double layered timing counterTC for measuring the $e^+$ time.The design parameters and performance of the spectrometer during the 2008physics run are described.

Autor: Paolo Walter Cattaneo INFN Pavia, Italy, for the MEG collaboration


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