Dortmund 2021 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 22: Experimental techniques in astroparticle physics I
T 22.3: Vortrag
Montag, 15. März 2021, 16:35–16:50, Tv
Trilateration-based Geometry Calibration of the IceCube Detector — •Matthias Boddenberg1, Christian Haack3, Saskia Philippen1, Martin Rongen2, and Christopher Wiebusch1 for the IceCube collaboration — 1RWTH Aachen University - Physics Institute III B, Aachen, Germany — 2Johannes Gutenberg-Universität Mainz — 3TU München
The IceCube Neutrino Observatory detects charged particles by measuring their Cherenkov light using photomultipliers embedded in the deep Antarctic ice at the South Pole. Reconstruction of the particle directions relies on arrival times of Cherenkov photons at the position of these photomultipliers. Their currently assumed positions are only accurate to about a meter. Goal of this work is improving the calibration of these sensor positions. For this, we measure the transit times of light emitted from LEDs within the sensor modules and received by neighboring sensors. From these transit times the sensor distances can be derived using models for the light propagation in ice. In this talk, we present a novel method for calibrating the detector geometry based on the trilateration of these distances within a global likelihood analysis.