Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 100: Cosmic Ray 5
T 100.1: Vortrag
Donnerstag, 24. März 2022, 16:15–16:30, T-H32
Low-Energy Cosmic Ray Composition with IceCube and IceTop — •Julian Saffer for the IceCube collaboration — Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie (KIT)
IceTop is the surface component of the IceCube Neutrino Observatory at the geographic South Pole and dedicated to the indirect detection of cosmic rays (CRs). Studying the primary CR spectrum and mass composition around the knee requires a dedicated IceTop trigger for smaller air showers initiated by lower-energy primaries as well as the combination of surface (predominantly electromagnetic) and corresponding in-ice (muonic) signals. Monte-Carlo simulation data of air showers at IceCube ranging down to E0 = 105 GeV have been used to train boosted decision trees for the reconstruction of shower core position, zenith angle, primary energy and mass of the incoming CR particles.
This talk presents the input features fed into the different machine learning models, the chosen model architectures and reconstruction results for four primary mass types. Additionally, plans towards an enhancement of the reconstruction utilizing a set of convolutional neural networks are discussed.