Hamburg 2016 – scientific programme
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T: Fachverband Teilchenphysik
T 69: Neutrinomasse III
T 69.3: Talk
Wednesday, March 2, 2016, 17:20–17:35, VMP5 SR 0079
Simulation of differential electron spectra in the KATRIN WGTS — •Norman Haußmann for the KATRIN collaboration — Bergische Universität Wuppertal
The KArlsruhe TRItium Neutrino (KATRIN) experiment aims to measure the effective electron antineutrino mass in a model-indepedent way with a sensitivity of 200 meV/c2 (90 % C.L.).
In order to extract the neutrino mass the Windowless Gaseous Tritium Source (WGTS) properties of KATRIN need to be known to a high precision. For this reason several monitoring systems are installed. One of them, situated in the transport section, is the Forward Beam Monitor (FBM). The FBM is capable of recording the electron rate (106 e/s· mm2) and the differential electron spectra with a high energy resolution and precision.
The electrons in the WGTS are emitted isotropically and guided magnetically. Thereby, the electrons undergo different effects changing their kinetic energy and angle to the guiding field. The major influence herein is elastic and inelastic scattering.
Changes in the column density are expected to have a great influence on lower energetic electrons and thereby change the spectrum and count rate at the FBM-detector. Monte-Carlo simulations have been performed to understand the influences of varying column densities and temperature fluctuations on the expected count rate and spectra by tracking the emitted electrons. The results will be shown in this talk.