Aachen 2019 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 8: Neutrinophysik I

T 8.1: Gruppenbericht

Montag, 25. März 2019, 16:00–16:20, S06

Towards a neutrino mass measurement with the KATRIN experiment — •Stephanie Hickford for the KATRIN collaboration — Karlsruher Institut für Technologie

The KArlsruhe TRItium Neutrino (KATRIN) collaboration aims to determine the neutrino mass with a sensitivity of 0.2 eV/c2 (90 % CL). This will be achieved by measuring the endpoint region of the tritium β-electron spectrum. High statistics are obtained from a high intensity gaseous tritium source and an O(1 eV) energy resolution near the endpoint of molecular tritium at 18575 eV is obtained using a MAC-E filter spectrometer with high angular acceptance.

Two measurement phases took place in 2018, both of which are major milestones on the path to neutrino mass measurements. “First Tritium” took place during May and June, in which trace amounts of tritium at the sub-percent level mixed with deuterium were injected into the source. Commissioning phase III took place during September, in which systematic effects were studied using electrons from a precision photoelectron source and conversion electrons from 83mKr. The results from these measurement phases, as well as final steps towards neutrino mass measurements beginning in 2019, will be 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).

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