KATRIN "First Light" - Commissioning and Modelling of the Beamline

The Karlsruhe TRitium Neutrino (KATRIN) experiment is the next generation tritium beta-decay experiment to perform a direct and model independent measurement of the effective electron-neutrino mass with an unprecedented sensitivity of 200 meV (90% C.L.). The thesis describes the commissioning and modelling of the entire beamline with a focus on the alignment of the magnetic flux tube that guids the signal electrons. The aim is to demonstrate the required collision-free guidance through the entire KATRIN beamline in order to obtain the statics that are essential for achieving the targeted sensitivity.