https://doi.org/10.1140/epjc/s10052-022-10220-4
Regular Article - Experimental Physics
Background reduction at the KATRIN experiment by the shifted analysing plane configuration
1
Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Str. 9, 48149, Münster, Germany
2
Institute of Experimental Particle Physics (ETP), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
3
Institute for Astroparticle Physics (IAP), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
4
Technische Universität München, James-Franck-Str. 1, 85748, Garching, Germany
5
Max-Planck-Institut für Physik, Föhringer Ring 6, 80805, Munich, Germany
Received:
1
February
2022
Accepted:
10
March
2022
Published online:
26
March
2022
The KATRIN experiment aims at measuring the electron neutrino mass with a sensitivity of 0.2 eV/c after 5 years of data taking. Recently a new upper limit for the neutrino mass of 0.8 eV/c
(90% CL) was obtained. To reach the design sensitivity, a reduction of the background rate by one order of magnitude is required. The shifted analysing plane (SAP) configuration exploits a specific shaping of the electric and magnetic fields in the KATRIN main spectrometer to reduce the spectrometer background by a factor of two. We discuss the general idea of the SAP configuration and describe the main features of this novel measurement mode.
© The Author(s) 2022
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Funded by SCOAP3