München 2019 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HK: Fachverband Physik der Hadronen und Kerne
HK 43: Astroparticle Physics III
HK 43.3: Vortrag
Mittwoch, 20. März 2019, 17:15–17:30, HS 16
Backgrounds in KATRIN — •Anna Pollithy for the KATRIN collaboration — Technische Universität München, Fakultät für Physik, 85748 Garching
The Karlsruhe Tritium Neutrino (KATRIN) experiment is designed to determine the effective electron anti-neutrino mass with a sensitivity of 200 meV/c2 (90% C.L.) by investigating the energy spectrum of tritium beta-electrons near the endpoint. For the full neutrino mass sensitivity a very low background level of 10−2 cps is required. The residual background shows characteristics that point towards ionization of highly excited ’Rydberg’ atoms as a potential background source. These ’Rydberg’ atoms can be created by radioactive decays in the walls. In this contribution dedicated measurements to investigate this kind of background creation mechanism will be presented. This work is supported by the SFB1258 and the Max Planck Society.