Measurement of the electric potential and the magnetic field in the shifted analysing plane of the KATRIN experiment

Abstract

The projected sensitivity of the effective electron neutrino-mass measurement with the KATRIN experiment is below 0.3 eV (90 % CL) after five years of data acquisition. The sensitivity is affected by the increased rate of the background electrons from KATRIN's main spectrometer. A special shifted-analysing-plane (SAP) configuration was developed to reduce this background by a factor of two. The complex layout of electromagnetic fields in the SAP configuration requires a robust method of estimating these fields. We present in this paper a dedicated calibration measurement of the fields using conversion electrons of gaseous ${}^{83m}$Kr, which enables the neutrino-mass measurements in the SAP configuration.

19 pages, 11 figures

References in corpus (10)

• Cosmological parameters derived from the final (PR4) Planck data release
• Direct Measurements of Neutrino Mass
• The Design, Construction, and Commissioning of the KATRIN Experiment
• Focal-plane detector system for the KATRIN experiment
• Analysis methods for the first KATRIN neutrino-mass measurement
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• Background reduction at the KATRIN experiment by the shifted analysing plane configuration
• Wideband precision stabilization of the -18.6 kV retarding voltage for the KATRIN spectrometer
• Operation Modes of the KATRIN Experiment Tritium Loop System using ${}^{83\mathrm{m}}$Kr

Cited by in corpus (2)

• Direct neutrino-mass measurement based on 259 days of KATRIN data
• A precision 32 keV angular-selective photoelectron source for calibration measurements at the KATRIN experiment