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T: Fachverband Teilchenphysik

T 80: Neutrinophysik VIII

T 80.1: Gruppenbericht

Donnerstag, 22. März 2018, 16:30–16:50, Z6 - HS 0.001

KM3NeT/ORCA: status and perspective — •Jannik Hofestädt for the ANTARES-KM3NeT-Erlangen collaboration — Friedrich-Alexander-Universität Erlangen-Nürnberg, ECAP

ORCA is the low-energy part of KM3NeT, the next-generation underwater Cherenkov neutrino detector under construction in the Mediterranean Sea. ORCA's primary goal is to resolve the long-standing question of the neutrino mass hierarchy by measuring matter-induced modulations on the oscillation probabilities of few-GeV atmospheric neutrinos. ORCA features a dense configuration of optical modules, optimised for the study of interactions of neutrinos with energies down to a few GeV. The same technology, albeit in a sparser configuration, is also used for high-energy (TeV-PeV) neutrino astronomy with the ARCA neutrino telescope, the other part of KM3NeT. The first ORCA detection unit was successfully deployed on 22.9.2017 and is providing high-quality data since then.

In this talk, the status of the ORCA detector construction and the performance of the first detector modules in the deep sea will be reported. The expected sensitivity of ORCA to the neutrino mass hierarchy and oscillation parameters are discussed.