Würzburg 2018 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 9: Neutrinophysik IX
T 9.9: Vortrag
Montag, 19. März 2018, 18:00–18:15, Z6 - HS 0.002
The PMT Mass Testing System for the JUNO Experiment using commercial shipping containers — Caren Hagner1, David Meyhöfer1, Henning Rebber1, •Malte Stender1, Björn Wonsak1, David Blum2, Marc Breisch2, Tobias Heinz2, Tobias Lachenmaier2, Axel Müller2, Tobias Sterr2, and Alexander Tietzsch2 for the JUNO collaboration — 1Institut für Experimentalphysik, Universität Hamburg — 2Physikalisches Institut, Eberhard Karls Universität Tübingen
JUNO is a 20 kt liquid scintillator detector, which observes reactor antineutrinos. To reach its goal of determining the neutrino mass hierarchy, an energy resolution of 3 % @ 1 MeV or better is one of the key requirements of the upcoming JUNO experiment, which is currently under construction in China. Therefore, an optical coverage greater than 75 % and a photon detection efficiency greater than 27 % are needed. This will be realized by about 20000 20-inch-PMTs and up to 25000 3-inch-PMTs used in the experiment.
Further, it is indispensable that every PMT used in JUNO is tested and characterised with respect to e.g. quantum efficiency, dark noise rate and time resolution.
The testing takes place in commercial shipping containers equipped with a PMT mass testing facility setup.
In this talk, we present the concept of the test facility, give details about the used structure and electronics and report about the commissioning of the first system in southern China during the last year.
This work is supported by the Deutsche Forschungsgemeinschaft.