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T: Fachverband Teilchenphysik

T 51: Experimental Techniques in Astroparticle Physics 2

T 51.7: Vortrag

Dienstag, 22. März 2022, 17:45–18:00, T-H36

Effects of unresolved particles in the counts estimated by a segmented detector — •Flavia Gesualdi^1,2 and Daniel Supanitsky¹ — ¹Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Centro Atómico Constituyentes, B1650KNA San Martín, Buenos Aires, Argentina — ²Karlsruhe Institute of Technology, Institute for Astroparticle Physics (IAP), 76021 Karlsruhe, Germany

Segmented particle counters are part of many astroparticle physics detectors and are used to estimate particle densities. For instance, measuring the density of muons in air showers is key for composition analyses, which in turn help to elucidate the origin of cosmic rays. Technically, the goal of a segmented particle counter is to provide an accurate estimate of the impinging number of particles from the measured number of hit segments. If two particles hit a same segment within a time interval smaller than the time resolution, the two particles are counted as one. This undercounting effect, referred to as pile-up, is larger when the number of segments is small with respect to the number of impinging particles, and when the time resolution is poor compared to the characteristic duration of a single-particle signal. In this work, we develop a new pile-up-correction method that makes use of the whole temporal structure of the signal. We compare its performance against methods in literature. We show that the method of this work performs well when considering typical air-shower signals, and that it is also the only one that extends well to long or double-bump-like signals.