Münster 2017 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 12: Neutrinophysik 2 (Doppelbetazerfall)
T 12.4: Vortrag
Montag, 27. März 2017, 17:35–17:50, VSH 118
Development of Large Area Silicon Photomultipliers in Noble Liquids for the nEXO Experiment — •Ako Jamil1,2, Alexis Schubert2, Gaosong Li2, Igor Ostrovskiy2, Giorgio Gratta2, Gisela Anton1, and Thilo Michel1 — 1Friedrich-Alexander-Universität Erlangen Nürnberg — 2Stanford University
The nEXO experiment will reach a half-life sensitivity of 5×1027 yrs for the neutrino-less double beta decay of 136Xe. nEXO will use Silicon Photomultipliers (SiPM) for the detection of the 175nm scintillation light of xenon. Simulations have shown that to reach the desired energy resolution of 1% (σ), a total of 4m2 of photo detectors are required, which would have to detect at least 5% of the scintillation light. Recent measurements show promising results from various SiPM vendors, where the detectors exceed the necessary 15% photon detection efficiency and meet our correlated avalanche rate requirement. The nEXO collaboration is also investigating solutions for reading out m2 of SiPMs, which has not been done before. A prototype, with a photo detector area of about 40cm2, has been developed and tested in a liquid xenon TPC. In this talk we will report the development of solutions for light detection in nEXO, highlighting the technologies that are pioneered by the collaboration, especially VUV sensitive SiPMs and large area integration as well as readout in liquid xenon.