Heidelberg 2022 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

T: Fachverband Teilchenphysik

T 48: Neutrino Physics without Accelerators 3

T 48.8: Vortrag

Dienstag, 22. März 2022, 18:00–18:15, T-H33

Measurements of the attenuation length and the group velocity of liquid scintillators with the CELLPALS method — •Jessica Eck, Lukas Bieger, David Blum, Marc Breisch, Srijan Delampady, Gina Grünauer, Tobias Heinz, Benedict Kaiser, Frieder Kohler, Tobias Lachenmaier, Axel Müller, Tobias Sterr, Alexander Tietzsch, and Jan Züfle — Eberhard Karls Universität Tübingen, Physikalisches Institut

The Jiangmen Underground Neutrino Observatory (JUNO) is currently constructed in southern China with the main goal to determine the neutrino mass hierarchy by detecting reactor antineutrinos. The JUNO detector consists of a large spherical vessel filled with 20ktons of highly transparent liquid scintillator. To quantify the transparency, a measurement of the attenuation length is crucial, however, this poses a challenge for attenuation lengths of several tens of meters due to the necessity of a sufficient long light path through the sample.

This talk will present the CELLPALS method to measure the attenuation length of liquid scintillators using an optical cavity to extend the effective light path. In addition, the CELLPALS method also provides the determination of the group velocity of the sample. The experimental setup and the results for different samples will be presented.

This work is supported by the Deutsche Forschungsgemeinschaft.