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T: Fachverband Teilchenphysik

T 11: Neutrino-Astronomie I

T 11.4: Vortrag

Montag, 25. März 2019, 16:45–17:00, S10

Trilateration-based geometry calibration of the IceCube detector — •Frederic Jonske, Christian Haack, Lilly Peters, Shefali Shefali, Martin Rongen, and Christopher Wiebusch for the IceCube collaboration — III. Physikalisches Institut B, RWTH Aachen University

The IceCube Neutrino Observatory detects charged particles by measuring their Cherenkov light using photomultipliers. These photomultipliers have been inserted into the clear antarctic ice at depths between 1450 and 2450 meters. Reconstruction relies on arrival times of light at the position of these sensors. However, their position is currently only known to within a few meters based on deployment data and calibration with light sources. Trilateration of the arrival times of light emitted from LEDs within the sensor modules and received by neighboring sensors can be used to determine the relative sensor positions. In this talk, we discuss an improved determination of the detector geometry using trilateration and recent models of light propagation in ice.