Münster 2017 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 65: Experimentelle Techniken der Astroteilchenphysik 4
T 65.5: Vortrag
Dienstag, 28. März 2017, 17:45–18:00, S 055
GEANT simulations of KATRIN FBM data — •Norman Haußmann for the KATRIN collaboration — Bergische Universität Wuppertal
The KArlsruhe TRItium Neutrino (KATRIN) experiment aims to measure the effective neutrino mass in a model-independent 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 FBM-detector electronics are shielded by a stainless steel plate with a cutout for two PIN-diodes. The effects of this plate as well as the reflection of electrons on the source’s rear-wall are investigated and their influence on the spectral shape.
Since the detector is situated far outside of the flux tube, the influence of secondary electrons has to be investigated, they originate from the source’s and transport section’s walls.
The simulations and the latest results are presented in this talk.