中子电偶极矩实验中校正系统效应的磁场绘图
Mapping of the magnetic field to correct systematic effects in a neutron electric dipole moment experiment
摘要：
专门用于测量中子电偶极矩的实验需要对磁场均匀性进行出色的控制。Paul Scherrer研究所的中子电偶极矩（nEDM）实验使用199 Hg共同磁力计精确监测磁场变化。在存在场不均匀性的情况下，该共磁力计负责该测量的最大系统效应。为了评估和纠正这一影响，在2013年、2014年和2017年的测绘活动期间对场不均匀性进行了离线测量。我们介绍了这些活动的结果，以及这种效应的校正给中子电偶极矩测量带来的改进。
英文摘要：
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 199Hg co-magnetometer to precisely monitor magnetic field variations. This co-magnetometer, in the presence of field non-uniformity, is responsible for the largest systematic effect of this measurement. To evaluate and correct that effect, offline measurements of the field non-uniformity 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.
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