Calibration and Performance of the Surface Scintillator Detector of the Pierre Auger Observatory
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(Published version)
Date
2025
Authors
Abdul Halim, A.
Abreu, P.
Aglietta, M.
Allekotte, I.
Almeida Cheminant, K.
Almela, A.
Aloisio, R.
Alvarez-Muñiz, J.
Ambrosone, A.
Ammerman Yebra, J.
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Conference paper
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Proceedings of Science, 2025, vol.501, pp.0227-1-0227-12
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International Cosmic Ray Conference (ICRC) (15 Jul 2025 - 24 Jul 2025 : Geneva, Switzerland)
Abstract
The Pierre Auger Observatory has led to significant advances in our understanding of ultra- high-energy cosmic rays. These new insights have driven a major upgrade of the Observatory, known as AugerPrime, through which the experiment has entered its Phase II, a new period of data collection. A key part of the upgrade is adding surface scintillator detectors (SSD) on top of the existing water-Cherenkov detectors (WCD). The main goal is to leverage their different responses to the electromagnetic and muonic shower components, enhancing the reconstruction of the primary cosmic-ray mass. In this contribution, we present the methods that involve analyzing peak and charge distributions of atmospheric muons for accurate calibration during extensive air-shower event reconstruction, along with the development of a rate-based algorithm for independent calibration. We also show the performance of the SSDs with Phase-II data, including PMT reliability and stability of key parameters, such as gain and signal-to-noise ratio
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© 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).