Abstract.- Introduction and objectives of the thesis.- Neutrino Physics.- The KATRIN experiment.- Monte Carlo simulation package.- Muon induced background.- Background due to Penning traps.- Background due to stored electrons following nuclear decays.- Background due to stored electrons following nuclear decays.- Conclusion.- Optimization of the spectrometer transmission properties with the air coil system.- Comparison of transmission measurements at the pre-spectrometer with Kassiopeia simulations.- Alternative methods of removing stored electrons.
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