The n2EDM Experiment at PSI

The CP-violating neutron electric dipole moment (nEDM) is sensitive to physics beyond the Standard Model which is needed to explain the baryon asymmetry in our universe. The most precise measurement of the nEDM, carried out at Paul Scherrer Institute (PSI), is consistent with zero with an upper limit of 1.8x10^−26 e cm at the 90% confidence level. To reach an order of magnitude better sensitivity, the n2EDM experiment is being commissioned at PSI. It has been completely redesigned including a new magnetic shield room with spin transport/precession coils and an active magnetic shield, a double precession chamber with new HV electrodes and Hg-199 comagnetometers, 112 optically pumped Cs magnetometers, and two simultaneous spin analyzers with ultracold neutron detectors. The experiment is currently being commissioned and entering the physics data collection phase.