Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 33: Cosmic Rays VI

T 33.6: Talk

Tuesday, March 16, 2021, 17:15–17:30, Th

Studies and comparison of charge signals measured by IceTop — •Sally-Ann Browne for the IceCube collaboration — Institut für Astroteilchenphysik, Karlsruher Institut für Technologie (KIT)

IceTop is the surface array of the IceCube Neutrino Observatory and one of its missions is the detection of air showers initiated by cosmic rays. IceTop consists of 81 stations with two ice-Cherenkov tanks, each, which can be operated in either ’Hard Local Coincidence’ (HLC) mode or ’Soft Local Coincidence’ (SLC) mode. In HLC mode, signals are read out only if two neighboring tanks are triggered simultaneously. In SLC mode, the signal is recorded when one single tank is triggered. The latter becomes more likely with increasing distance to the air shower core. Thus, most SLC signals occur in the region where the muon component dominates the air shower. Therefore, by studying SLC signals one can obtain relevant information about the muon content and thereby also about the primary particle of detected air showers. In this talk, I will illustrate the characteristics of SLC signals and explain some challenges of studying them. In addition, I will give examples of ongoing studies in which Monte-Carlo-simulated SLC signals are being compared with real data from IceTop.