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Calorimeter commissioning of the SuperNEMO Demonstrator

  • SuperNEMO collaboration
  • Univ. Bordeaux
  • University of Edinburgh
  • the NEMO-3/SuperNEMO collaboration
  • University College London
  • Université Paris-Saclay
  • Comenius University
  • Aix-Marseille Université
  • Laboratoire de Physique des Particules
  • University of Manchester
  • Normandy University
  • Institute of Experimental and Applied Physics Czech Technical University in Prague
  • Idaho National Laboratory
  • Czech Technical University in Prague
  • The University of Texas at Austin
  • Charles University
  • University of Warwick
  • Osaka University
  • Imperial College London
  • University of Jyväskylä
  • Institute for Organic Chemistry of the National Academy of Sciences of Ukraine
  • Laboratori Nazionali del Gran Sasso

Research output: Contribution to journalArticlepeer-review

Abstract

The SuperNEMO experiment is searching for neutrinoless double-beta-decay of 82Se, with the unique combination of a tracking detector and a segmented calorimeter. This feature allows us to detect the two electrons emitted in the decay and measure their individual energies and angular distribution. The SuperNEMO Demonstrator’s calorimeter consists of 712 plastic scintillator blocks read out by large PMTs. Having constructed the calorimeter underground, we performed its first commissioning using γ-rays from calibration sources or from the ambient radioactivity background. This article presents quality assurance tests of the SuperNEMO Demonstrator’s calorimeter, and its first time and energy calibrations with γ-rays, along with the associated methods. A time alignment of about 120 ps and a time resolution around 615 ps have been achieved. Concerning the energy, an alignment of 7.5 % has been obtained. These results will be further improved when associating the tracking detector and detecting electrons from calibration sources.

Original languageEnglish
Article numberT11003
JournalJournal of Instrumentation
Volume20
Issue number11
DOIs
Publication statusPublished - 1 Nov 2025
Externally publishedYes

Keywords

  • Calorimeters
  • Double-beta decay detectors

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