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Münster 2017 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 64: Experimentelle Techniken der Astroteilchenphysik 3

T 64.6: Vortrag

Dienstag, 28. März 2017, 18:00–18:15, VSH 18

SiPM performance in the Scintillator Upgrade of the Pierre Auger Observatory — •Julian Kemp, Thomas Bretz, Thomas Hebbeker, Lukas Middendorf, Christine Peters, and Johannes Schumacher for the Pierre Auger collaboration — III. Physikalisches Institut A, RWTH Aachen University

The Pierre Auger Observatory successfully measures cosmic-ray air-showers at the highest energies by detecting both the fluorescence light produced in the atmosphere and the particle density of the shower at the ground. Nevertheless, this procedure does not allow for a precise measurement of the muon to electron ratio of a single shower. As this quantity is connected to the mass of the primary particle, it allows for a cosmic-ray mass composition measurement. To improve the ability of separating muons from the electromagnetic component, scintillator based detectors will be added to each surface detector station. The basic design consists of several scintillator bars feeding the produced light into a bundle of wavelength shifting fibers. The light can be detected by either photomultiplier tubes (PMTs) or by silicon photomultipliers (SiPMs). The latter benefit from their high photon detection efficiency and robustness. Three prototype devices based on SiPMs have successfully been installed at the Pierre Auger Observatory in September 2016. Their performance is studied.

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