Background reduction at the KATRIN experiment by the shifted analysing plane configuration

Abstract

The KATRIN experiment aims at measuring the electron neutrino mass with a sensitivity of 0.2 eV$/c^2$ after five years of data taking. Recently a new upper limit for the neutrino mass of 0.8 eV$/c^2$ (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.

arXiv comment16 pages, 6 figures

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Cited by in corpus (4)

• Direct neutrino-mass measurement based on 259 days of KATRIN data
• KATRIN: Status and Prospects for the Neutrino Mass and Beyond
• An active transverse energy filter to differentiate low energy particles with large pitch angles in a strong magnetic field
• Measurement of the electric potential and the magnetic field in the shifted analysing plane of the KATRIN experiment