Mapping of the magnetic field to correct systematic effects in a neutron electric dipole moment experiment
Journal
Physical Review A
Journal Volume
106
Journal Issue
3
Start Page
032808
ISSN
2469-9926
2469-9934
Date Issued
2022-09-16
Author(s)
Abstract
Experiments dedicated to the measurement of the electric dipole moment of the neutron require outstanding control of the magnetic-field uniformity. The neutron electric dipole moment (nEDM) experiment at the Paul Scherrer Institute uses a Hg199 co-magnetometer to precisely monitor temporal magnetic-field variations. This co-magnetometer, in the presence of field nonuniformity, is, however, responsible for the largest systematic effect of this measurement. To evaluate and correct that effect, offline measurements of the field nonuniformity were performed during mapping campaigns in 2013, 2014, and 2017. We present the results of these campaigns, and the improvement the correction of this effect brings to the neutron electric dipole moment measurement.
Publisher
American Physical Society (APS)
Type
journal article