Aachen 2019 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 33: Neutrino-Detektoren I

T 33.3: Vortrag

Dienstag, 26. März 2019, 16:30–16:45, S07

Attenuation length measurement of liquid scintillators with CELLPALS — •Tobias Heinz, Axel Müller, David Blum, Alexander Tietzsch, Tobias Sterr, Marc Breisch, and Tobias Lachenmaier — Eberhard Karls Universität Tübingen

In large liquid scintillator detectors like the JUNO detector a high optical transparency for the scintillation light is one of the key requirements. To quantify the optical transparency, a measurement of the attenuation length is crucial. The measurement of attenuation lengths of several tens of meters is difficult due to the necessity of a sufficient long light path through the sample to lead to a measurable decrease of the light intensity.

This talk will present the newly developed CELLPALS technique to measure the attenuation length of liquid scintillators using an optical cavity to extend the effective light path through the medium and therefore providing a more precise measurement of the attenuation length. The current status of the experimental setup and first results will be presented.

This work is supported by the Deutsche Forschungsgemeinschaft.