SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 74: DetSys MAGIX, DetSys KATRIN

T 74.2: Vortrag

Mittwoch, 22. März 2023, 16:05–16:20, WIL/C307

Scintillating active Transverse Energy Filter: a novel detector concept for low-energy electron background discrimination — •Joscha Lauer for the KATRIN collaboration — Karlsruhe Institute of Technology (KIT)

One of the leading sensitivity limiting factors in the Karlsruhe Tritium Neutrino (KATRIN) experiment are background electrons from the main spectrometer. These electrons, presumably low in energy at their creation point, are currently indistinguishable from the tritium beta electrons. Since they arrive at the detector with predominantly small angles relative to the guiding magnetic field lines in contrast to the signal electrons, an angular selective detector has great potential in increasing the sensitivity of the KATRIN experiment by enhancing the signal-to-background ratio.
Micro-structured detector configurations which exhibit angular selectivity due to their 3D structure, so-called active Transverse Energy Filters (aTEF), have been proposed by Eur. Phys. J. C 82 (2022) 922. One approach is a scintillator-based aTEF (scint-aTEF). This presentation gives an overview of the aTEF principle and in particular the scint-aTEF detector, including GEANT4 simulation-based studies and prototype micro-structures 3D printed via two-photon lithography.
This work is supported by the Helmholtz Association, the Ministry for Education and Research BMBF (05A17PM3, 05A17PX3, 05A17VK2 and 05A17WO3), the Helmholtz Alliance for Astroparticle Physics (HAP) and the Helmholtz Initiative and Networking Fund (W2/W3-118).