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Design and status of the Mu2e electromagnetic calorimeter

Atanov, N. and Echenard, B. and Flood, K. and Hitlin, D. G. and Miyashita, T. and Porter, F. and Zhu, R. Y. (2016) Design and status of the Mu2e electromagnetic calorimeter. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 824 . pp. 695-698. ISSN 0168-9002. doi:10.1016/j.nima.2015.09.074.

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The Mu2e experiment at Fermilab aims at measuring the neutrinoless conversion of a negative muon into an electron and reach a single event sensitivity of 2.5×10^(-17) after three years of data taking. The monoenergetic electron produced in the final state, is detected by a high precision tracker and a crystal calorimeter, all embedded in a large superconducting solenoid (SD) surrounded by a cosmic ray veto system. The calorimeter is complementary to the tracker, allowing an independent trigger and powerful particle identification, while seeding the track reconstruction and contributing to remove background tracks mimicking the signal. In order to match these requirements, the calorimeter should have an energy resolution of O(5)% and a time resolution better than 500 ps at 100 MeV. The baseline solution is a calorimeter composed of two disks of BaF_2 crystals read by UV extended, solar blind, Avalanche Photodiode (APDs), which are under development from a JPL, Caltech, RMD consortium. In this paper, the calorimeter design, the R&D studies carried out so far and the status of engineering are described. A backup alternative setup consisting of a pure CsI crystal matrix read by UV extended Hamamatsu MPPC׳s is also presented.

Item Type:Article
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URLURL TypeDescription
Hitlin, D. G.0000-0003-4028-6982
Porter, F.0000-0003-1948-8889
Zhu, R. Y.0000-0003-3091-7461
Additional Information:© 2015 Elsevier B.V. Available online 2 October 2015.
Subject Keywords:Calorimetry; Scintillating crystals; Avalanche photodiodes; Silicon photomultipliers; Lepton flavour violation
Record Number:CaltechAUTHORS:20160531-090308017
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Official Citation:N. Atanov, V. Baranov, J. Budagov, R. Carosi, F. Cervelli, F. Colao, M. Cordelli, G. Corradi, E. Dané, Yu.I. Davydov, S. Di Falco, S. Donati, R. Donghia, B. Echenard, K. Flood, S. Giovannella, V. Glagolev, F. Grancagnolo, F. Happacher, D.G. Hitlin, M. Martini, S. Miscetti, T. Miyashita, L. Morescalchi, P. Murat, D. Pasciuto, G. Pezzullo, F. Porter, A. Saputi, I. Sarra, S.R. Soleti, F. Spinella, G. Tassielli, V. Tereshchenko, Z. Usubov, R.Y. Zhu, Design and status of the Mu2e electromagnetic calorimeter, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Volume 824, 11 July 2016, Pages 695-698, ISSN 0168-9002, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:67481
Deposited By: Tony Diaz
Deposited On:31 May 2016 17:07
Last Modified:11 Nov 2021 00:33

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