Würzburg 2018 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 91: Experimentelle Methoden der Astroteilchenphysik IV

T 91.6: Vortrag

Donnerstag, 22. März 2018, 17:45–18:00, Z6 - SR 2.011

Improved liquid argon scintillation light readout for Gerda Phase II — •Patrick Krause¹, Maria Fomina^1,2, Konstantin Gusev^1,3, Jozsef Janicsko², Oskar Moras¹, Vlad Samoil¹, Stefan Schönert¹, Egor Shevchik², Christoph Wiesinger¹, and Marisa Zengerle¹ — ¹Physik-Department and Excellence Cluster, Technische Universität München, Garching, Germany — ²Joint Institute for Nuclear Research, Dubna, Russia — ³now at Leibniz-Institut für Kristallzüchtung, Berlin, Germany

Liquid Argon (LAr) scintillates upon interaction with ionizing radiation. In this process light with a wavelength of 128 nm is emitted. With the help of so-called wave length shifting (WLS) fibers and silicon photomultipliers (SiPMs) this property is exploited in Gerda’s active background suppression strategy to reject events with coincident energy deposition in the germanium detectors and the surrounding LAr. An improved version of the WLS fiber-modules and the SiPM-readout has been developed. This talk will report the changes, challenges and improvements compared to the previous design.

This work has been supported by the German Federal Ministry for Education and Research (BMBF) Verbundforschung 05A17W02 and the German Research Foundation (DFG) via the SFB1258.