TY - JOUR
T1 - The LEGEND-200 Liquid Argon Instrumentation
T2 - 18th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2023
AU - The LEGEND collaboration
AU - Abritta, Igor
AU - Araujo, Gabriela
AU - Baudis, Laura
AU - Burlac, Nina
AU - D'Andrea, Valerio
AU - Deckert, Rosanna
AU - Fomina, Maria
AU - Gusev, Konstantin
AU - Leonhardt, Andreas
AU - Krause, Patrick
AU - Papp, Laszlo
AU - Rumyantseva, Nadya
AU - Salamanna, Giuseppe
AU - Schönert, Stefan
AU - Schwarz, Mario
AU - Shevchik, Egor
AU - Tagnani, Diego
AU - Vogl, Christoph
AU - Zinatulina, Daniya
N1 - Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).
PY - 2024/3/22
Y1 - 2024/3/22
N2 - LEGEND-200 is an experiment designed to search for neutrinoless double beta decay of 76Ge by operating up to 200 kg of enriched germanium detectors in liquid argon (LAr). To achieve ultra-low backgrounds, the LAr is instrumented to detect scintillation light emitted upon interactions with ionizing radiation, thus tagging and rejecting backgrounds. The LAr scintillation light is detected with wavelength-shifting fibers coupled to silicon photomultiplier (SiPM) arrays. In this document, we demonstrate the high photoelectron resolution and low noise level of the SiPM signals. We also present the results of special calibration runs performed to determine the light yield and background suppression factors. We show the background suppression performance of the LAr instrumentation on the LEGEND-200 background spectrum before and after the LAr light coincidence cut. Finally, we present the event topology classifier which enables effective particle discrimination, allowing the identification of background types in LEGEND-200.
AB - LEGEND-200 is an experiment designed to search for neutrinoless double beta decay of 76Ge by operating up to 200 kg of enriched germanium detectors in liquid argon (LAr). To achieve ultra-low backgrounds, the LAr is instrumented to detect scintillation light emitted upon interactions with ionizing radiation, thus tagging and rejecting backgrounds. The LAr scintillation light is detected with wavelength-shifting fibers coupled to silicon photomultiplier (SiPM) arrays. In this document, we demonstrate the high photoelectron resolution and low noise level of the SiPM signals. We also present the results of special calibration runs performed to determine the light yield and background suppression factors. We show the background suppression performance of the LAr instrumentation on the LEGEND-200 background spectrum before and after the LAr light coincidence cut. Finally, we present the event topology classifier which enables effective particle discrimination, allowing the identification of background types in LEGEND-200.
UR - http://www.scopus.com/inward/record.url?scp=85189206536&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:85189206536
SN - 1824-8039
VL - 441
JO - Proceedings of Science
JF - Proceedings of Science
M1 - 256
Y2 - 28 August 2023 through 1 September 2023
ER -