SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 14: Neutrinos, Dark Matter II

T 14.6: Vortrag

Montag, 20. März 2023, 17:45–18:00, HSZ/0002

Optimisation of Light Concentrators in the OSIRIS Upgrade — •Marcel Büchner — Johannes Gutenberg-University Mainz

OSIRIS as the pre-detector of the JUNO reactor neutrino measurement, is meant to monitor the radio-purity of the scintillator used. When upgraded in the future, it is supposed to either be used as solar neutrino detector or to search for neutrino-less double-Beta decay. To provide a better energy resolution, the photon detection efficiency of OSIRIS needs to be increased. This is achieved by increasing the number of PMTs used along with adding Winston cones as light concentrators in front of them. Previous optimisations have shown that the optimal shape of these light concentrators depends heavily on the exact detector geometry. So the ideal arrangement for the PMTs needs to be found. This talk presents the on going work to optimise the light collection of the OSIRIS upgrade. During first tests an arrangement of 132 PMTs with light concentrators, on an almost equidistant triangular grid has been found, with an optical coverage that is at least 9 times higher then the current OSIRIS detector.