Hamburg 2016 – scientific programme

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T: Fachverband Teilchenphysik

T 17: Neutrinoastronomie I

T 17.6: Talk

Monday, February 29, 2016, 12:20–12:35, VMP9 SR 08

Status and Performance of the Wavelength-shifting Optical Module for In-Ice Neutrino Detectors — •Dustin Hebecker — HU-Berlin / DESY

The Wavelength-shifting Optical Module is a single-photon sensor that employs wavelength-shifting and light-guiding techniques to maximize the collection area while minimizing the dark noise rate. The sensor is tailored towards application in ice-Cherenkov neutrino detectors, such as IceCube-Gen2 or MICA. It is aimed at decreasing the energy threshold as well as increasing the energy resolution and the vetoing capability of the neutrino telescope, when compared to a setup with optical sensors similar to those used in IceCube. The proposed sensor captures photons with wavelengths between 250 nm and 400 nm. These photons are re-emitted with wavelengths above 400 nm by a wavelength shifter coating applied to a 90 mm diameter polymer tube. This tube guides the light towards a small-diameter PMT via total internal reflection. As a core component the wavelength shifting and light guiding inner tubes performance has been investigated with multiple methods that will be presented. Furthermore the status of the whole prototype development and its performance will be discussed.