Bonn 2020 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 43: Poster session Particle Physics
T 43.11: Poster
Dienstag, 31. März 2020, 17:00–18:30, Grotte
Detector upgrade for sterile neutrino search at KATRIN — •Martin Descher for the KATRIN collaboration — Karlsruher Institut für Technologie
The KATRIN Experiment is a high precision β-decay experiment which aims to measure the effective electron neutrino mass with a sensitivity of 0.2 eV (90% confidence level). Additionally, the TRISTAN project of the KATRIN experiment aims to search for the signature of keV sterile neutrinos in the β-decay spectrum of tritium. For a three year measurement of the differential β-electron energy spectrum at an event rate of 108 counts per second (cps), a sensitivity for sterile mixing angles sin2θ < 10−6, within the accessible sterile neutrino mass range, is projected. For this measurement, a detector with improved energy resolution and high rate capabilities is necessary. The development of the envisioned 3500 pixel silicon drift detector, consisting of 21 separate modules, is roughly structured in three stages: Detector prototyping, first module development, and assembly of the full detector. Detectors from the first two development stages are being integrated into the KATRIN beamline for testing purposes while simultaneously serving as upgrades for existing components. A detector from the prototyping stage is already integrated as a radioactive source monitoring device (Forward Beam Monitor), and the first module is planned to replace the current detector of the monitor spectrometer in 2020. Meanwhile, the planning for the final detector assembly with regard to vacuum requirements, electromagnetic field design, and data acquisition is advancing.