LANL nEDM Magnetic Scanner Sensitivity Improvements

The LANL nEDM experiment requires specific magnetic conditions to precisely measure the electric dipole moment of a neutron. This measurement could provide insight into the matter-antimatter asymmetry of the universe. An external magnetic scanner was implemented to maintain control of the nEDM magnetic environment by detecting magnetic contamination of hardware used to assemble the experimental apparatus. Both physical and data analysis improvements were made to the magnetic scanner that increased its sensitivity. For example, the target signal is made to appear at a constant frequency by a turning table. Meanwhile, a QuSpin magnetometer is positioned above the table. Additionally, a reflector on the edge of the table is detected by a photodetector each turn. These physical implications enable QuSpin data to be windowed into revolutions that include a possible signal as well as background. Analysis techniques are used to reduce noise and baseline drift while preserving any signal from magnetic contaminants. The details of the analysis methods, along with the hardware that enables them, will be presented.