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Design of a scintillating active Transverse Energy Filter for Background Suppression at the KATRIN Experiment

Gutknecht, Nathanael 1; KATRIN Collaboration
1 Institut für Astroteilchenphysik (IAP), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

The Karlsruhe Tritium Neutrino (KATRIN) experiment aims to determine the mass of the electron antineutrino with an unprecedented sensitivity of 0.2 eV/c2 (90 % C. L.) by precise measurement of the energy spectrum of tritium β-electrons. The energy of the signal electrons are spectrometrically determined in a MAC-E-Filter setup. At the moment, one sensitivity limiting factor is the spectrometer background which consists of electrons that are generated in the mainspectrometer volume. Due to their small initial energy the background electrons have a different angular distribution than the signal electrons at the point of detection.
A scintillating structure acting as an angular selective detector (scint-aTEF) has potential to discriminate between β- and background electrons. This talk will discuss the geometrical concept of the scint-aTEF and its expected impact on the background reduction, based on simulations with Geant4.
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).


Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Publikationstyp Vortrag
Publikationsdatum 22.03.2023
Sprache Englisch
Identifikator KITopen-ID: 1000156022
HGF-Programm 51.13.01 (POF IV, LK 01) Neutrinophysik und Dunkle Materie
Veranstaltung 86th Jahrestagung der DPG und DPG-Frühjahrstagung der Sektion Materie und Kosmos - Arbeitskreis Beschleunigerphysik (SMuK 2023), Dresden, Deutschland, 20.03.2023 – 24.03.2023
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