Dortmund 2021 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 13: Cosmic Rays I
T 13.8: Vortrag
Montag, 15. März 2021, 17:50–18:05, Tm
Calibration of the Underground Muon Detector in the Pierre Auger Observatory — •Marina Scornavacche1,2, Federico Sanchez1, Juan Manuel Figueira1, Markus Roth2, and Ana Martina Botti1,2 for the Pierre Auger collaboration — 1Instituto de Tecnologias en Deteccion y Astroparticulas, Comision Nacional de Energia Atomica, 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. One of the most sensitive observables to the mass composition is the muon content of the air showers. The Underground Muon Detector (UMD) is optimized to perform a direct measurement of this component in the ankle-region of the energy spectrum and has two complementary ways to estimate the number of muons: counting mode and integrator mode. In case of the integrator mode, the output signal is based on the total signal charge and the number of muons can be estimated by dividing this signal by the mean charge of a single muon. In this work, we show how to calibrate the integrator on simulations to obtain the mean charge left by a single muon. In order to compare with UMD field data, simulations of a single muon were performed following the distributions on energy and zenith angle of the atmospheric muons. The simulated muons were also asked to satisfy the same condition of recontruction that is requested (for the binary channel) in the field. We will report on the status and recent developments.