Hamburg 2016 – scientific programme

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T: Fachverband Teilchenphysik

T 23: Postersitzung

T 23.15: Poster

Monday, February 29, 2016, 13:30–14:30, VMP4 Foyer

VUV-sensitive Silicon-Photomultipliers for the nEXO-Experiment — •Gerrit Wrede, Reimund Bayerlein, Patrick Hufschmidt, Ako Jamil, Judith Schneider, Michael Wagenpfeil, Tobias Ziegler, Jürgen Hößl, Gisela Anton, and Thilo Michel — ECAP, Friedrich-Alexander-Universität Erlangen-Nürnberg

The nEXO (next Enriched Xenon Observatory) experiment will search for the neutrinoless double beta decay of Xe-136 with a liquid xenon TPC (Time ProjectionChamber). The sensitivity of the experiment is related to the energy resolution, which itself depends on the accuracies of the measurements of the amount of drifting electrons and the number of scintillation photons with their wavelength being in the vacuum ultraviolet band. Silicon Photomultipliers (SiPM) shall be used for the detection of the scintillation light, since they can be produced extremely radiopure. Commercially available SiPM do not fulfill all requirements of the nEXO experiment, thus a dedicated development is necessary. To characterize the silicon photomultipliers, we have built a test apparatus for xenon liquefaction, in which a VUV-sensitive photomultiplier tube can be operated together with the SiPM.

In this contribution we present our apparatus for the SiPM characterization measurements and our latest results on the test of the silicon photomultipliers for the detection of xenon scintillation light.