Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 33: Neutrino-Detektoren I

T 33.4: Talk

Tuesday, March 26, 2019, 16:45–17:00, S07

Status update on AURORA — •Wilfried Depnering and Michael Wurm for the JUNO collaboration — Johannes Gutenberg - Universität, Institut für Physik, Staudingerweg 7, 55122 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 LS (attenuation length ≥ 20 m @ 430 nm) has to be sufficiently high and stable during the whole operation time. One device for in-situ monitoring of the optical LS quality is AURORA (A Unit for Researching On-line the LSc tRAnsparency) inside the central detector of JUNO. It allows to detect potential aging effects of the liquid and a gradient in its refractive index. The latter can be caused by a temperature gradient and would lead to curved light propagation, which would need to be taken into account during the event reconstruction. This talk presents the current status of AURORA. The development is funded by the DFG Research Unit “JUNO”.