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T: Fachverband Teilchenphysik

T 108: Neutrinophysik 9 (sterile Neutrinos)

T 108.5: Vortrag

Donnerstag, 30. März 2017, 17:55–18:10, VSH 118

Systematic effects at the detector section of KATRIN and their impact to a sterile neutrino search — •Marc Korzeczek for the KATRIN collaboration — 2Institute of Experimental Nuclear Physics (IEKP), Karlsruhe Institute of Technology (KIT), Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany

The KATRIN (KArsrluhe TRItium Neutrino Experiment) investigates energy endpoint of the tritium beta-decay to determine the effective mass of the electron anti-neutrino with a precision of 200 meV (@90CL) after an effective data taking time of three years. A possible future extension of KATRIN is the search for a sterile neutrino signature in the tritium beta-decay. Such a search requires to measure the whole energy spectrum of tritium beta-decay and thus requires a redesign of the detector section, as the total rate at the detector is increased by several orders of magnitude. Moreover systematic effects, such as detector backscattering and the detector deadlayer, which lead to drastic modifications of the measured energy spectrum, have to be investigated and modeled in order to achieve high sterile neutrino sensitivities. This talk discusses the impact of such systematics and shows the status of the modeling approaches.