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The calorimeter project for the Mu2e experiment

Budagov, J. and Carosi, R. and Cervelli, F. and Cheng, C. and Cordelli, M. and Davydov, Yu. and Downie, E. J. and Echenard, B. and Giovannella, S. and Glagolev, V. and Happacher, F. and Hitlin, D. and Lucà, A. and Miscetti, S. and Ongmongkolkul, P. and Onorato, G. and Otte, P. and Pezzullo, G. and Pileggi, G. and Porter, F. and Saputi, A. and Sarra, I. and Tassielli, G. and Thomas, A. (2013) The calorimeter project for the Mu2e experiment. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 718 . pp. 56-59. ISSN 0168-9002.

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The Mu2e experiment at Fermilab aims to measure the charged lepton flavor violating neutrinoless conversion of a negative muon into an electron. The conversion results in a monochromatic electron with an energy slightly below the rest mass of the muon (104.97 MeV). We expect to set a limit of ∼ 6×10^(−17) at 90% CL in three years of running, using an intense and clean pulsed μ^− beam providing ∼10^(18) stopped muons on target in three years of running. The experiment performs a strong suppression of potential background by gating off the prompts and performing precise momentum determination in conjunction with an highly efficient cosmic veto. The calorimeter should confirm that the candidates reconstructed by the tracker system are indeed conversion electrons and provide an independent trigger (or event reduction filter) for the experiment. It should also provide standalone muon to electron rejection. Moreover, it must be able to keep functionality in a high radiation dose environment inside a 10^(−4)_(torr) vacuum enclosure and in a presence of 1 T axial magnetic field. In order to accomplish all these tasks, a LYSO crystals calorimeter has been chosen. We show the proposed design and the experimental results obtained by exposing a small size calorimeter prototype to a tagged photon beam from 40 to 300 MeV at the A2 photon facility of the Mainz Microton (MAMI), Germany.

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Hitlin, D.0000-0003-4028-6982
Porter, F.0000-0003-1948-8889
Additional Information:© 2012 Elsevier B.V. Available online 5 December 2012. The authors are grateful to many people for the successful realization of the matrix. Inparticular, we thank all the LNF mechanical shop for the realization of the support and APD boxes, especially G. Bisogni, U. Martini and A. DePaolis. We also thank the MAMI staff for providing the beam time. The realization of the preamplifiers was done in collaboration with E. Reali from the University of Rome "Tor Vergata".
Subject Keywords:Calorimetry; LYSO crystals; Mu2e experiment
Record Number:CaltechAUTHORS:20130801-145133831
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Official Citation:J. Budagov, R. Carosi, F. Cervelli, C. Cheng, M. Cordelli, Yu. Davydov, E.J. Downie, B. Echenard, S. Giovannella, V. Glagolev, F. Happacher, D. Hitlin, A. Lucà, S. Miscetti, P. Ongmonkolkul, G. Onorato, P. Otte, G. Pezzullo, G. Pileggi, F. Porter, A. Saputi, I. Sarra, G. Tassielli, A. Thomas, The calorimeter project for the Mu2e experiment, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume 718, 1 August 2013, Pages 56-59, ISSN 0168-9002, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39717
Deposited By: Ruth Sustaita
Deposited On:02 Aug 2013 16:20
Last Modified:09 Mar 2020 13:18

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