Bonn 2020 – scientific programme
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T: Fachverband Teilchenphysik
T 43: Poster session Particle Physics
T 43.8: Poster
Tuesday, March 31, 2020, 17:00–18:30, Grotte
Comparison of column density simulation and measurement in KATRINs windowless gaseous tritium source — •Paul Filip and Fabian Block — Institute of Experimental Particle Physics, Karlsruhe Institute of Technology
The KArlsruhe TRItium Neutrino (KATRIN) experiment aims to measure the effective rest mass of the electron anti-neutrino with a sensitivity of 0.2 eV/c2 (90 % C.L.). For this purpose, KATRIN utilizes a model-independent approach that relies on a high-accuracy investigation of the endpoint region of the tritium β-decay spectrum.
A key component of KATRIN is the high-luminosity Windowless Gaseous Tritium Source (WGTS) that contains molecular tritium gas. Though the amount of tritium in the WGTS can be controlled precisely, the uncertainty on the absolute calibration of the column density is a dominant systematic factor that impacts the accuracy on the measured neutrino mass.
The comparison between simulated and measured column density during KATRINs second neutrino mass measurement campaign is described in this poster. An improved understanding of gas dynamics inside the WGTS is achieved, which allows for more accurate column density calibrations in future neutrino mass measurement campaigns.
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).