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T: Fachverband Teilchenphysik

T 56: Neutrino-Detektoren II

T 56.4: Vortrag

Mittwoch, 27. März 2019, 16:45–17:00, S07

Investigation of detector effects for a sterile neutrino search at KATRIN — •Marc Korzeczek for the KATRIN collaboration — Karlsruhe Institut für Technologie, Karlsruhe, Deutschland

The KATRIN (KArsrluhe TRItium Neutrino Experiment) investigates the 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 measuring 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, charge sharing and the detector deadlayer, which lead to drastic modifications of the measured energy spectrum, have to be measured and modeled in order to achieve high sterile neutrino sensitivities. This talk discusses the impact of such systematics and compares measurements to current modeling approaches.