SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 66: Neutrinos II
T 66.2: Vortrag
Mittwoch, 22. März 2023, 16:05–16:20, POT/0251
Column Density Determination for the KATRIN Neutrino Mass Measurement — Fabian Block1, •Christoph Köhler2, and Sonja Schneidewind3 for the KATRIN collaboration — 1Karlsruhe Institute of Technology — 2Technical University of Munich — 3Westfälische Wilhelms-Universität Münster
The KATRIN experiment aims to model-independently probe the effective electron anti-neutrino mass with a sensitivity of 0.2 eV (90 % CL) by investigating the endpoint region of the tritium beta decay spectrum. To achieve this goal the gas quantity of the windowless gaseous tritium source, characterized by the column density, has to be known with great accuracy.
We present in this talk the principle of measuring the column density with an angular resolved photoelectron source and describe the method to ensure continuous monitoring of the column density during measurement campaigns of KATRIN. The influence of the recent hardware upgrade of the photoelectron source is discussed in light of the column density determination accuracy.
This work is supported by the Technical University of Munich, the Helmholtz Association, the Ministry for Education and Research BMBF (05A17PM3, 05A17PX3, 05A17VK2, 05A17WO3, 05A20PMA), the Helmholtz Alliance for Astroparticle Physics (HAP), the Helmholtz Initiative and Networking Fund (W2/W3-118) and Deutsche Forschungsgemeinschaft DFG (Research Training Group GRK 2149).