Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 33: Neutrino-Detektoren I

T 33.2: Talk

Tuesday, March 26, 2019, 16:15–16:30, S07

Radon Monitoring in gaseous Nitrogen used for the Filling of the Central Detector of JUNO and OSIRIS — •Hans Theodor Josef Steiger, Alexander Gardanow, Philipp Landgraf, and Lothar Oberauer for the JUNO collaboration — Physik Department der Technischen Universität München, 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 with ²²²Rn, it’s content in the nitrogen gas will be monitored. In this talk the status of a prototype radon monitoring system based on a 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 Cluster of Excellence "Origin and Structure of the Universe", the DFG research unit "JUNO" and the Maier-Leibnitz-Laboratorium.