Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 92: Neutrino physics without accelerators VIII

T 92.1: Talk

Friday, April 3, 2020, 11:00–11:15, H-HS II

Status Update on AURORA — •Wilfried Depnering and Michael Wurm — Johannes Gutenberg-University, Institute of Physics, Staudingerweg 7, 55128 Mainz, Germany

The Jiangmen Underground Neutrino Observatory (JUNO) is a reactor antineutrino experiment which aims to determine the neutrino mass hierarchy with at least 3σ significance. In order to reach that goal, an energy resolution of 3% @ 1 MeV is required. Therefore, the transparency of the liquid scintillator (LSc) has to be sufficiently high (attenuation length ≥ 20 m @ 430 nm) and stable during the whole operation time.

One device for in-situ monitoring of the optical LSc quality is AURORA (A Unit for Researching On-line the LSc tRAnsparency) inside the central detector of JUNO. Tiltable, blue laser beams are used to measure the optical attenuation of the LSc allowing the detection of potential aging effects over time. This talk presents the current status of AURORA. The development is funded by the DFG Research Unit "JUNO".