Development of a high-resolution optical magnetic-field sensor for experiments to measure the electric dipole moment of the neutron

开发用于测量中子电偶极矩实验的高分辨率光学磁场传感器

• 批准号: 167716229
• 负责人: Dr. Georg Bison
• 金额: --
• 依托单位: Paul Scherrer Institut (PSI)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2013-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/167716229?language=en
• 关键词: Development; resolution; optical; magnetic; field

In the next generation of experiments to measure the electric dipole moment of the neutron (nEDM)precise control of the main magnetic field on an absolute scale will be decisive for the success ofthe experiment. Many different systems for magnetic field control such as Cs magnetometers, Hemagnetometers or SQUIDs are currently discussed. In this proposal we concentrate on improvingoptically pumped Cs magnetometers that were used in EDM experiments already. A recent studyrevealed an effect that produces small systematic errors in the readings of such magnetometers.Such errors are particularly harmful for EDM experiments, but can be corrected in a novel magnetometer scheme which uses several laser beams. The novel scheme also enables us to detect the vector information of the magnetic field which further improves field control. If the full potential of Cs magnetometers can be realized, they will be the most sensitive sensor option for integration times of approximately 100s available today. A joint experiment, in which all available sensor options will be compared, will show to which extend the high potential of the Cs magnetometer can be realized.

在下一代测量中子电偶极矩（nEDM）的实验中，在绝对尺度上精确控制主磁场将决定实验的成功。目前讨论了许多不同的磁场控制系统，例如铯磁力计、血磁计或 SQUID。在本提案中，我们专注于改进已用于 EDM 实验的光泵浦铯磁力计。最近的一项研究揭示了一种效应，会在此类磁力计的读数中产生较小的系统误差。此类误差对于 EDM 实验特别有害，但可以在使用多个激光束的新型磁力计方案中进行纠正。这种新颖的方案还使我们能够检测磁场的矢量信息，从而进一步改善磁场控制。如果可以充分发挥 Cs 磁力计的潜力，它们将成为当今集成时间约为 100 秒的最灵敏的传感器选择。一项联合实验将比较所有可用的传感器选项，将展示铯磁力计的高潜力可以发挥到什么程度。