Bonn 2020 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 92: Neutrino physics without accelerators VIII

T 92.5: Vortrag

Freitag, 3. April 2020, 12:00–12:15, H-HS II

Background at the KATRIN experiment: Investigations of Radon and Rydberg induced events — •Alessandro Schwemmer for the KATRIN collaboration — Max-Planck-Institut für Physik

To achieve the design sensitivity of the Karlsruhe Tritium Neutrino (KATRIN) Experiment of mν = 0.2   eV   c−2 (90   % CL), a low background rate is essential. The residual background is dominated by two processes: Decays of radon emanated from the getter material and ionization of Rydberg states created by alpha decays in the spectrometer walls. To determine the individual fractions, Monte Carlo simulations are performed with the particle tracking software Kassiopeia (Furse et al. "Kassiopeia: A Modern, Extensible C++ Particle Tracking Package" (2016)) and compared to measurements. This contribution presents first results and gives an outlook on the possibility of discriminating between β-electrons and Rydberg-induced electrons.

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