Hamburg 2016 – scientific programme

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T: Fachverband Teilchenphysik

T 69: Neutrinomasse III

T 69.4: Talk

Wednesday, March 2, 2016, 17:35–17:50, VMP5 SR 0079

Tritium source-related systematic uncertainties of the KATRIN experiment — •Hendrik Seitz-Moskaliuk for the KATRIN collaboration — Karlsruher Institut für Technologie, Institut für experimentelle Kernphysik, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen

KATRIN will perform a direct, kinematics-based measurement of the neutrino mass with a sensitivity of 200 meV (90 % C. L.) reached after 3 years of measurement time. The neutrino mass is obtained by determining the shape of the spectrum of tritium β decay electrons close to the endpoint of 18.6 keV with a spectrometer of MAC-E filter type. To achieve the planned sensitivity, the systematic measurement uncertainties have to be carefully controlled and evaluated. Main sources of systematics are the MAC-E filter on the one hand and the source and transport section (STS) on the other hand. Most of the operational parameters of KATRIN have to be stable at or even below the per mille level and have to meet further strict requirements.

This talk will review the KATRIN systematics with a special focus on the STS. Early commissioning measurements to determine the main systematics will be introduced.

This work is supported by BMBF (05A14VK2) and the Helmholtz Association.