Köln 2025 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 60: Astroparticle Physics VIII

HK 60.1: Group Report

Thursday, March 13, 2025, 17:30–18:00, SR 0.03 Erw. Physik

First result of the CONUS+ experiment — •Nicola Ackermann for the Conus collaboration — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

With the CONUS+ reactor antineutrino experiment, the coherent elastic neutrino nucleus scattering (CEνNS) on germanium nuclei is currently studied at the nuclear power plant in Leibstadt, Switzerland. Very low energy thresholds down to 160 eV were achieved in four 1 kg point contact germanium detectors equipped with electric cryocooling. The setup is positioned at a distance of about 20 m from the center of the reactor core. The detector performances and first CONUS+ results after few months of data taking will be presented. In November 2024 three detectors were replaced by newer models with higher Ge crystal masses of 2.4 kg each to further improve the sensitivity of the experiment.

Keywords: Neutrinos; CEvNS; Germanium; Nuclear reactor; Low background