Contribution

The Acoustic Calibration System of the IceCube Upgrade

Authors

* Presenting author
Day / Time: 20.03.2025, 11:00-11:40
Room: Hall E, Poster Island E
Typ: Poster
Session: Acoustic Measurements and Sensor Technology (Poster Island E)
Information: The posters will be exhibited in Hall E north from Tuesday to Thursday, sorted by thematic context in the poster island indicated in the session title. The poster session at the specified time offers the opportunity to enter into discussion with the authors.
Abstract: The IceCube Neutrino Observatory is a large-scale instrument for fundamental astrophysical research. It consists of 5160 optical sensors distributed at depths of 1.5 to 2.5 km over a volume of 1 km³ in the ice at the geographic South Pole.An upgrade of the detector is currently in preparation, during which over 700 new calibration and sensor modules will be added to the center of the detector. Part of this upgrade will be an acoustic network consisting of 10 Acoustic Modules (AMs) that transmit and receive sound and compact acoustic sensors in 14 of the new optical modules. The main goal of the system is to locate the acoustic devices in the ice with a high degree of accuracy (few tens of cm) over a distance of several hundred meters. For this purpose, chirp signals are sent in the frequency range of 5-30 kHz, which will be used to measure the acoustic transit time by determining the group delay. Using a minimization procedure, the positions of the modules and glaciological properties such as the speed of sound can be determined from the transit time measurements. The construction and function of this acoustic calibration system are presented.