Workshop on "Determination of the Absolute Electron (Anti-)Neutrino Mass"

Measurement of the Tritium Column Density at the KATRIN Experiment

Apr 14, 2026, 5:29 PM

2m

Gaede Foyer (KIT Campus South)

Poster Posters

Speakers

Christoph Köhler (Max-Planck-Institut für Kernphysik) Neven Kovac (Institute for Astroparticle Physics, Karlsruhe Institute of Technology)

Description

Currently, the tightest constraints on the absolute scale of neutrino mass from a direct, model-independent approach, are obtained by the KATRIN experiment, giving an upper limit on the mass of the electron anti-neutrino of 0.45 eV (https://doi.org/10.48550/arXiv.2406.13516), with final projected sensitivity below 0.3 eV. Reaching this ambitious goal requires proper treatment of all systematic effects, with the scattering related systematics currently being the dominant contribution. In particular, the determination of the tritium gas density for each scientific run, usually expressed in terms of column density, is of great importance. With this poster, we will show the column density measurement procedure including the calibration methods that allow to obtain gas density on the β-scan level.