Precision magnetic field characterization for a neutron electric dipole moment search

A non-zero neutron electric dipole moment (nEDM) violates CP-symmetry and is thus closely related to the Baryon Asymmetry in the Universe. It is the goal of the TUCAN collaboration to search for an nEDM with a sensitivity of 10^-27 ecm. This experiment is conducted using ultracold neutron (UCN) spectroscopy. A static magnetic holding field applied to UCN must be controlled to the order of pico Tesla with respect to its homogeneity to achieve this sensitivity objective. My studies focus on developing an optimal measurement routine for an offline magnetic field mapping device. We adapted a state-of-the-art harmonic polynomial magnetic field decomposition to gain improved insight into the role magnetic field inhomogeneities play for systematic uncertainties. This enables the collaboration to determine different components of the uncertainty budget of a future nEDM measurement. On this poster I present a summary of my simulation and analytical work towards specific systematic uncertainties on the path towards an improved nEDM search sensitivity.