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The KATRIN magnet system

For the proposed neutrino experiment KATRIN a new magnet system has to be designed. The superconducting magnet system has to guide the electrons originating from tritium beta decay from the source through the spectrometer to the detector. In order to determine the neutrino mass by measuring the electron energy spectrum the magnet system has to transport the electrons adiabatically along the 70 meter long experiment. The typical field of the system will be 5.6 T. Different sections of the magnetic transport system serve additional purposes so that a high precision measurement can be performed. The overall design as well as some details on different sections are presented in this paper.