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T: Fachverband Teilchenphysik

T 54: Experimentelle Methoden der Astroteilchenphysik 2

T 54.8: Vortrag

Dienstag, 25. März 2014, 18:30–18:45, P7

WOM - A Wavelength-shifting optical module for IceCube — •Dustin Hebecker¹, Lukas Schulte¹, Marek Kowalski¹, Sebastian Boeser¹, and Lutz Köpke² — ¹Physikalisches Institut Uni Bonn — ²Uni Mainz

Current Cherenkov detectors that are deployed rely on single photon sensors based on PMT's. In order to lower the detection threshold. One needs to maximise the photon capture capability, i.e. the effective area for Cherenkov photons. This is of special importance when targeting low-energy neutrinos. Current PMTs have the disadvantage of a high noise rate (800 Hz for IceCube) that increases whith size. The WOM (Wavelength-shifting optical module) now targets this issues by expanding the capture area while decreasing the size of the PMT. Photons are first captured in an organic wavelength-shifting material (WLS) that is coated on waveguiding material to guide the light to a smaller PMT. This allows to achieve a very large collection area and reduces the noise to the order of 10 Hz. Photon capture efficiencies as high as 50% have been achieved and a research program to further enhance the sensitivity will be presented.