The KATRIN experiment aims at measuring the electron neutrino mass with a sensitivity of 0.2 eV/c2 after five years of data taking. Recently a new upper limit for the neutrino mass of 0.8 eV/c2 (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.
@article{arxiv.2201.11743,
title = {Background reduction at the KATRIN experiment by the shifted analysing plane configuration},
author = {Alexey Lokhov and Benedikt Bieringer and Guido Drexlin and Stephan Dyba and Kevin Gauda and Florian Fränkle and Ferenc Glück and Volker Hannen and Dominic Hinz and Susanne Mertens and Caroline Rodenbeck and Anna Schaller and Christian Weinheimer},
journal= {arXiv preprint arXiv:2201.11743},
year = {2022}
}