Published July 11, 2022 | Version v1
Preprint Open

Design, assembly and operation of a Cosmic Ray Tagger based on scintillators and SiPMs

Creators

  • 1. Laboratori Nazionali di Frascati
  • 2. INFN Sezione di Pisa
  • 3. Università di Roma "Tor Vergata"
  • 4. Laboratori Nazionali di FrascatiLaboratori Nazionali di Frascati
  • 5. INFN Sezione di Ferrara

Description

The Mu2e experiment at Fermilab aims to search for the SM forbidden μ− → e− conversion in Al muonic atoms. The signal signature consists of 104.96 MeV electrons, identified by a straw-tube tracker and a crystal calorimeter, made of two annular disks.
In order to calibrate the calorimeter disks with minimum ionizing particles (MIP) before the installation, we have realized a Cosmic Ray Tagger (CRT) at Laboratori Nazionali di Frascati (LNF) of INFN. The CRT consists of two planes of eight 2.5×1.5×160 cm3 plastic scintillator (EJ-200) bars, coupled to SiPMs on both edges, so as to estimate longitudinal hit positions from time differences. 3D MIP tracking is achieved by reconstructing hit positions in the two planes, placed above and below the disks, and allows to calibrate the energy response, to align the time offsets, and to study the detector performances dependence along the crystals axis.

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Additional details

Funding

European Commission
INTENSE - INTENSE: particle physics experiments at the intensity frontier. A cooperative Europe - United States effort. 858199
European Commission
INTENSE - INTENSE: particle physics experiments at the high intensity frontier, from new physics to spin-offs. A cooperative Europe - United States - Japan effort. 822185
European Commission
PROBES - Probes of new physics and technological advancements from particle and gravitational wave physics experiments. A cooperative Europe - United States - Asia effort. 101003460
European Commission
aMUSE - advanced Muon Campus in US and Europe contribution 101006726
European Commission
NEWS - NEw WindowS on the universe and technological advancements from trilateral EU-US-Japan collaboration 734303

References

  • N. Atanov, et al., The Mu2e e.m. calorimeter: Crystals and sipms production status, IEEE Transactions on Nuclear Science 67 (6) (2020) 978–982. doi:10.1109/TNS.2020.2988422.
  • N. Atanov, et al., The Mu2e calorimeter final technical design report, arXiv e-prints (2018) arXiv:1802.06341