Realization of a magnetically shielded environment for a new measurement of the electric dipole moment of the neutron at the FRM-II and investigations of magnetic field related systematic effects

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A new generation experiment to measure a limit for the electric dipole moment of the neutron (nEDM) on the 10-28 e(cm level requires magnetic shielding on an unprecedented level. Due to its magnetic moment, the neutron is affected by the earth magnetic field as well as by other ambient magnetic field fluctuations and gradients. in this proposal the realization of a state-of-the art magnetically highly shielded environment for precision experiments with neutrons with focus on the nEDM measurement is presented. To establish such an environment, a detailed design and accurate control of fabrication procedures is required. inside the shield, magnetic fields need to be generated with high precision, requiring the implementation of various means of magnetometry. This is accompanied by experimental and theoretical studies of magnetic field related systematic effects on the measurement of the nEDM.