Münster 2011 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 35: Astroteilchenphysik - Poster

HK 35.1: Poster

Mittwoch, 23. März 2011, 14:00–16:00, Foyer Chemie

Deconvolution of the energy loss function in the KATRIN experiment — •Christopher Kranz, Anna Sejersen Riis, Christian Weinheimer, and Volker Hannen — Instititut für Kernphysik, Universität Münster, Germany

The KATRIN experiment is a next generation tritium β-decay experiment which will improve the ν-mass sensivity to 200 meV/c²(90% C.L.). In order to extract the β-spectrum from measurements, the energy loss function of electrons scattering on tritium needs to be known. This function can be deconvoluted from measurements of the response function of the KATRIN experiment at different source densities with a monoenergetic electron gun. Several Numerical methods to deconvolute the energy loss function from the data have been investigated and implemented into the analysis code.
In addition an optimal measurement time distribution for the response function is determined to get a minimal systematic error on the deconvoluted energy loss function and hence on the ν-mass squared.
Finally the possibilities of monitoring the column density ρd of the windowless gaseous tritium source (WGTS) during tritium measurements are examined.
This project is supported by BMBF under contract number 05A08PM1.