Measuring the Radial Component of the Magnetic Field in the Muon g-2 Experiment

A leading systematic error in the muon electric dipole moment (EDM) analysis at the Muon g-2 Experiment is the presence of radial magnetic fields because they cause indistinguishable effects to the muon spin precession plane from a true EDM measurement. Measuring a non-zero muon EDM would be evidence of CP-violation, indicating new physics beyond the Standard Model. The radial field occurs due to imperfections in the materials and alignment of magnetic elements, and is mostly offset by an applied radial field generated by surface correction coils (SCC). We determine an optimal SCC setting that best minimizes the background radial field by performing a scan at different electro-static quadrupole settings and studying the relationship between the vertical beam position and applied radial field. In this talk I will present our results and describe our efforts to design an apparatus outfitted with Hall probes and tilt sensors to directly measure the radial magnetic field as a function of azimuth.