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Mu2e e.m. Calorimeter: Crystals and SiPMs Production Status

Atanov, N. and Baranov, V. and Budagov, J. and Caiulo, D. and Cervelli, F. and Colao, F. and Cordelli, M. and Corradi, M. and Davydov, Yu. I. and Di Falco, S. and Diociaiuti, E. and Donati, S. and Donghia, R. and Echenard, B. and Giovannella, S. and Glagolev, V. and Grancagnolo, F. and Happacher, F. and Hitlin, D. and Martini, M. and Miscetti, S. and Miyashita, T. S. and Morescalchi, L. and Murat, P. and Pedreschi, E. and Pezzullo, G. and Porter, F. and Raffaelli, F. and Ricci, M. and Saputi, A. and Sarra, I. and Spinella, F. and Tassielli, G. and Tereshchenko, V. and Usubov, Z. and Vasilyev, I. I. and Zhu, R. Y. (2020) Mu2e e.m. Calorimeter: Crystals and SiPMs Production Status. IEEE Transactions on Nuclear Science, 67 (6). pp. 978-982. ISSN 0018-9499.

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The Mu2e experiment at Fermilab will search for the charged lepton flavor violating neutrino-less conversion of a negative muon into an electron in the field of an aluminum nucleus [1] , [2] . The Mu2e detector is comprised of a tracker, an electromagnetic calorimeter, and an external veto for cosmic rays. The calorimeter plays an important role in providing excellent particle identification capabilities, a fast and online trigger filter while aiding the track reconstruction capabilities. The calorimeter requirements are to provide a large acceptance for 100-MeV electrons and reach: 1) a time resolution better than 0.5 ns at 100 MeV; 2) an energy resolution O(10%) at 100 MeV; and 3) a position resolution of about 1 cm. The calorimeter consists of two disks, each one made of 674 pure CsI crystals readout by two large-area 2×3 array of UV-extended silicon photomultipliers (Mu2e SiPMs) of 6×6 mm² dimensions. A large-scale prototype has been constructed with 51 preproduction crystals readout by 102 Mu2e SiPMs. It has been tested at the beam test facility in Frascati, demonstrating satisfying results compared to the Mu2e requirements. At the moment of writing, the crystals production phase is halfway through the work, while the SiPM production has been completed. An overview of the characterization tests is also reported, together with a description of the final calorimeter design.

Item Type:Article
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URLURL TypeDescription
Hitlin, D.0000-0003-4028-6982
Porter, F.0000-0003-1948-8889
Sarra, I.0000-0002-5037-5316
Zhu, R. Y.0000-0003-3091-7461
Additional Information:© 2020 IEEE. Manuscript received February 13, 2020; accepted April 1, 2020. Date of publication April 16, 2020; date of current version June 19, 2020. This work was supported in part by the U.S. Department of Energy, in part by the Italian Istituto Nazionale di Fisica Nucleare, in part by the Science and Technology Facilities Council, U.K., in part by the Ministry of Education and Science of the Russian Federation, in part by the U.S. National Science Foundation, in part by the Thousand Talents Plan of China, in part by the Helmholtz Association of Germany, and in part by the EU Horizon 2020 Research and Innovation Program under the Marie Sklodowska-Curie Grant under Grant 690835. The authors are grateful for the vital contributions of the Fermilab staff and the technical staff of the participating institutions. In particular, they thank all the Laboratori Nazionali di Frascati (LNF) mechanical shop for the realization of the support and the beam test facility (BTF) staff for providing the beam time and helping them in getting a smooth running period. They express their warmest thanks to L. Foggetta for adjusting and tuning the beam to our detector needs. This document was prepared by members of the Mu2e Collaboration using the Resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract DE-AC02-07CH11359.
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC02-07CH11359
Istituto Nazionale di Fisica Nucleare (INFN)UNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
Ministry of Education and Science of the Russian FederationUNSPECIFIED
Thousand Talents Plan of ChinaUNSPECIFIED
Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF)UNSPECIFIED
Marie Curie Fellowship690835
Issue or Number:6
Record Number:CaltechAUTHORS:20200717-094223956
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Official Citation:N. Atanov et al., "The Mu2e e.m. Calorimeter: Crystals and SiPMs Production Status," in IEEE Transactions on Nuclear Science, vol. 67, no. 6, pp. 978-982, June 2020, doi: 10.1109/TNS.2020.2988422
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:104423
Deposited By: Tony Diaz
Deposited On:17 Jul 2020 17:36
Last Modified:17 Jul 2020 17:36

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