Karlsruhe 2024 – scientific programme
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T: Fachverband Teilchenphysik
T 6: Methods in astroparticle physics 1
T 6.3: Talk
Monday, March 4, 2024, 16:30–16:45, Geb. 20.30: 2.067
Construction of a Prototype of the Wavelength-Shifting Optical Module for the IceCube Upgrade — •Yuriy Popovych1, Sebastian Böser1, Ioana Caracas1, Enrico Ellinger2, Cloe Girard-Carillo1, Klaus Helbing2, Philipp Kern1, Anna Pollmann3, John Rack-Helleis1, Lea Schlickmann1, and Nick Schmeißer2 for the IceCube collaboration — 1Johannes Gutenberg-Universität Mainz — 2Bergische Universität Wuppertal — 3Chiba University, Japan
The Wavelength-shifting Optical Module (WOM) is one of the sensors to be deployed in the upcoming Upgrade for the IceCube Neutrino Observatory in 2025/26 increasing the sensitivity of low-energy neutrino events. The module consists of a tube coated with wavelength-shifting paint and two Photomultiplier Tubes (PMTs) coupled on both ends. UV-Cherenkov photons are shifted into the visible region, captured inside the tube by total internal reflection and propagated to the PMTs at the end. Besides an increased UV-sensitivity this design ensures a low signal-to-noise ratio by decoupling the photosensitive area and the PMTs. The modules have to withstand the harsh ambient conditions at the South Pole, as well as during transportation - most notably pressures of up to 600 bar during deployment. This talk will give an overview of the construction of the WOM prototype for the IceCube Upgrade and its engineering challenges, as well as reporting on the WOM final acceptance tests and the status of the production for the Upgrade deployment.
Keywords: wavelength-shifting; UV sensitivity; photon detection; neutrino detectors; prototype