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T: Fachverband Teilchenphysik

T 69: Neutrino physics without accelerators VI

T 69.10: Vortrag

Mittwoch, 17. März 2021, 18:20–18:35, Ts

Status update on AURORA — •Wilfried Depnering, Michael Wurm, Heike Enzmann, Paul Hackspacher, Kai Loo, Artur Meinusch, Oliver Pilarczyk, Hans Steiger, and Eric Theisen for the JUNO collaboration — Johannes Gutenberg University, Mainz, Germany

The Jiangmen Underground Neutrino Observatory (JUNO) is a reactor antineutrino experiment which aims to determine the neutrino mass ordering. In order to reach that goal, an energy resolution of 3% @ 1 MeV and percent-level understanding of energy-scale non-linearities are crucial prerequisites. Therefore, the transparency of the liquid scintillator (LS) has to be sufficiently high (attenuation length L≥ 20 m @ 430 nm) and remain 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 LS tRAnsparency) inside the central detector of JUNO. Tiltable, blue laser beams are used to measure the optical attenuation of the LS allowing the detection of aging or other potential effects on LS transparency over time.

This talk presents the current status of AURORA. The development is funded by the DFG Research Unit "JUNO"(FOR2319) and the Cluster of Excellence PRISMA⁺.