Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 49: Neutrino Physics without Accelerators 4
T 49.9: Vortrag
Dienstag, 22. März 2022, 18:25–18:40, T-H34
Increasing KATRIN’s luminosity by an enlarged acceptance angle — •Emanuel Weiss, Jan Behrens, Ferenc Glück, and Stephanie Hickford for the KATRIN collaboration — Institute for Astroparticle Physics and Institute of Experimental Particle Physics, Karlsruhe Institute of Technology
The KATRIN collaboration aims to determine the neutrino mass with a sensitivity of 0.2 eV/c2 (90% CL). This will be achieved by measuring and fitting the endpoint region of the tritium β-electron spectrum. The integral spectrum is measured by a MAC-E filter, which features a high acceptance angle for electrons emitted by a high-luminosity, isotropically emitting tritium source, ΔΩ/2π=1−cosθmax.
One approach to improve the statistical uncertainty of the experiment is to further the acceptance angle θmax, which depends on the ratio of source and maximum magnetic field. This can be achieved by keeping the source magnetic field at standard setting and scaling down the magnetic fields in the rest of the beam line. The changed electromagnetic conditions lead to increased β-electron statistics and influence several systematic effects. These effects, as well as the gain in statistics compared to the standard magnetic field settings, are evaluated by simulations and measurements that are presented in this talk.
This work is supported by the Helmholtz Association (HGF), the Ministry for Education and Research BMBF (05A17PM3, 05A17PX3, 05A17VK2, and 05A17WO3), the Helmholtz Alliance for Astroparticle Physics (HAP), and the Helmholtz Young Investigator Group (VH-NG-1055).