Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 36: Neutrino physics without accelerators III

T 36.1: Talk

Tuesday, March 31, 2020, 17:00–17:15, L-2.004

The OSIRIS-Prototype — Michael Wurm and •Oliver Pilarczyk — Institut für Physik, Johannes Gutenberg-Universität Mainz

The Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kt liquid scintillator detector currently under construction near Kaiping in the province Guangdong in southern China. To be able to fulfill the radiopurity requirements of the liquid scintillator there are several purification subsystems installed in the filling line of the JUNO main detector. The last in row of these subsystems is the OSIRIS detector, which will monitor scintillator samples for approximately one day in search of the decays of radioactive impurities. For this, warmed-up scintillator will be continuously filled from the top into a 3m x 3m cylindrical acrylics tank and drained from the bottom. Intermixing of new warm and old cooling scintillator is to be prevented by a temperature stratification inside the tank. Currently, a 1:10 prototype is being set up in Mainz in order to test the filling procedure and to optimize the geometries of the inlet and outlet diffusors to support stratification. This talk will report the current status of the prototype.