Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 47: Cosmic Ray 2
T 47.1: Vortrag
Dienstag, 22. März 2022, 16:15–16:30, T-H32
The Underground Muon Detector in The Pierre Auger Observatory: calibration and characterization — •Marina Scornavacche1,2, Federico Sánchez1, Juan Manuel Figueira1, and Markus Roth2 for the Pierre Auger collaboration — 1Instituto de Tecnologías en Detección y Astropartículas, Comisión Nacional de Energía Atómica, Buenos Aires, Argentina — 2Institut für Astroteilchenphysik, Karlsruher Institut für Technologie, Karlsruhe, Deutschland
The Pierre Auger Observatory was designed to answer the key questions about the origin and composition of ultra-high energy cosmic rays. The Underground Muon Detector (UMD) is optimized to perform a direct measurement of the muon component of the air showers in the ankle-region of the energy spectrum. To estimate the number of muons, one of the most sensitive observables to the mass composition of primary cosmic rays, the UMD works in two complementary ways dubbed as binary (or counting) and ADC (or integrator) modes. The first relies on the amplitude of the signals, the latter on its charge. In this work, we will focus on the integrator mode, where the number of muons can be estimated once the average charge left by a single muon is known. In previous analysis, we showed how to calibrate the integrator based on simulations. Now we study evolution of the calibration data, including monitoring variables involved in the calibration process. We also perform comparisons between data and simulation results and report on most recent developments and interpretations.