Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 7: Neutrino physics without accelerators II

T 7.3: Talk

Monday, March 30, 2020, 17:05–17:20, H-HS V

Radon Monitoring in gaseous Nitrogen used for the Filling of the Central Detector of JUNO and OSIRIS — •Hans Theodor Josef Steiger, Lothar Oberauer, and Matthias Raphael Stock — Technische Universität München (TUM), Physik-Department, James-Franck-Straße 1, 85748 Garching bei München

The planned JUNO (Jiangmen Underground Neutrino Observatory) Detector will use 20 kt of liquid scintillator (LS) based on LAB (Linear AlkylBenzene) as neutrino target within an acrylic sphere with a diameter of 35.4 m. For the filling of this sphere as well as for the filling of OSIRIS (Online Scintillator Internal Radioactivity Investigation System) with LS pressurized nitrogen will be used. To avoid a contamination of the LS withradon, its content in the nitrogen gas will be monitored. In this talk the status of a prototype radon monitoring system based on a large volume (50 l) proportional chamber operated in pure nitrogen will be presented as well as pulse shape analysis techniques applied for efficient background reduction. This work is supported by the DFG Research Unit JUNO and the Maier-Leibnitz-Laboratorium (MLL).