PoS - Proceedings of Science
Volume 441 - XVIII International Conference on Topics in Astroparticle and Underground Physics (TAUP2023) - Neutrino Physics and Astrophysics
First Energy Calibration of SuperNEMO’s Calorimeter using its Tracko-Calo Technology
C. Patrick*, X. Aguerre, F. Koňařík and T. Křižák
Full text: pdf
Pre-published on: January 25, 2024
Published on: March 22, 2024
The discovery of neutrinoless double beta decay (0𝜈𝛽𝛽) would be an important step in the un- derstanding of the nature of the neutrino. SuperNEMO is an experiment designed to search for 0𝜈𝛽𝛽, whose demonstrator module is located in Modane Underground Laboratory in France (LSM, 4800 m.w.e). It uses a unique technique combining a tracker and a segmented, scintillator- based calorimeter that allows to unambiguously identify the two final-state electrons and measure their time of flight and energy. It aims to achieve an ultra-low background level of < 10−4 events/(keV.kg.yr) and its topological reconstruction allows us to probe double-beta decay mechanisms.
The main energy calibration method uses conversion electrons from 207Bi sources that can be automatically deployed in the centre of the detector. A tracking algorithm based on the Legen- dre transform is being developed to reconstruct tracks. By combining tracker and calorimeter information, detailed studies of the energy response can be performed to evaluate effects such as non-uniformity and non-linearity of the scintillator, and energy losses in the tracker. Some preliminary measurements using the first data from the Demonstrator will be presented.
DOI: https://doi.org/10.22323/1.441.0281
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