Neutrino 2020

Background of the KATRIN experiment

Not scheduled

10m

Poster Poster session 4

Speakers

Mr Dominic Hinz (Karlsruhe Institute of Technology (KIT))Dr Ferenc Glück (Karlsruhe Institute of Technology (KIT))Dr Florian Fränkle (Karlsruhe Institute of Technology (KIT))Prof. Guido Drexlin (Karlsruhe Institute of Technology (KIT))Dr Joachim Wolf (Karlsruhe Institute of Technology (KIT))

Description

The objective of the KATRIN experiment is the measurement of the effective electron neutrino mass with an unprecedented sensitivity of 0.2 eV/c$^2$. In the ultra-precise measurement of beta-electrons from tritium-decays, a non-zero neutrino mass would be indicated by a minute deviation of the beta-spectrum close to the endpoint at 18.6keV. This is measured with a 24m long electrostatic spectrometer with eV-resolution. Since the last eV of the spectrum contains only $2\cdot10^{-13}$ of all beta-electrons, a low background rate is necessary. This poster describes the main background sources and the effectiveness of counter measures. The most prominent background sources are electrons produced by thermal ionization of highly excited Rydberg atoms and by magnetically trapped electrons from radioactive decays (e.g. radon) in the ultra-high vacuum of the spectrometer. Supported by the HGF and the German BMBF (05A17VK2).

Mini-abstract

Description of background sources and mitigation in the KATRIN experiment

Presentation materials

NU2020_KATRIN_Background.mp4

NU2020_KATRIN_Background.pdf