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HK: Fachverband Physik der Hadronen und Kerne
HK 52: Poster (b)
HK 52.9: Poster
Donnerstag, 2. April 2020, 16:30–18:30, Grotte
Characteristics of background electrons due to radioactive decays in the KATRIN spectrometers — •Dominic Hinz for the KATRIN collaboration — Karlsruhe Institute of Technology (KIT), Institute for Nuclear Physics (IKP)
The Karlsruhe Tritium Neutrino (KATRIN) experiment aims to measure the effective neutrino mass of electron anti neutrinos in a model-independent way by precise determination of the beta spectrum of molecular tritium. To achieve the sensitivity of mν= 0.2 eV/c2 (90% C.L.) on the effective neutrino mass, knowledge of statistical and systematic uncertainties as well as the background processes is essential.
The sensitivity is currently limited by a higher than anticipated background. Dedicated commissioning measurements showed that the sensitivity is affected by background electrons which are correlated to radioactive decays. Therefore, an understanding of the remaining background processes induced by radioactivity is of high relevance.
This poster focuses on background events due to radioactive decays in the KATRIN spectrometers and its impact on neutrino mass analysis.
This work is supported by the Helmholtz Association (HGF), the Ministry for Education and Research BMBF (05A17PM3, 05A17PX3, 05A17VK2, and 05A17WO3), the Helmholtz Alliance for Astroparticle Physics (HAP), and the Helmholtz Young Investigator Group (VH-NG-1055).