Precision measurements with polarized atoms

使用极化原子进行精密测量

• 批准号: 0653433
• 负责人: Michael Romalis
• 金额: $ 43.35万
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-07-01 至 2010-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0653433&HistoricalAwards=false
• 关键词: Precision; measurements; polarized; atoms

This precision measurement project employs spin-polarized gases to address fundamental questions of particle physics. Specifically the project will focus on the completion of a test of CPT (Charge, Parity, and Time Reversal) symmetry and Lorentz invariance using a dual magnetometer made of potassium and helium-3 placed on a rotating platform. This experiment probes physics beyond the Standard Model of particle physics. A second experiment using this dual magnetometer will search for nuclear spin-dependent forces. A further experiment, using a dual magnetometer made of cesium and xenon-129 will be used to search for a permanent electron and nuclear electric dipole moments (EDMs). A finite EDM would be a signature of CP (Charge and Parity) violation beyond the Standard Model. Additionally, new magnetometery techniques based on spin-exchange relaxation free (SERF) alakli-metal vapor will be developed with a goal of achieving field sensitivity an order of magnitude higher than the best magnetic field sensitivity available today. The broader impact of this project includes development of new techniques of ultra-sensitive magnetometery that can be used for brain imaging, geophysics, explosive detection and inertial navigation. In addition it will promote science education at all levels from K-12 to post-doctoral.

这个精密测量项目采用自旋极化气体来解决粒子物理学的基本问题。 具体而言，该项目将侧重于使用由钾和氦-3制成的双磁强计在旋转平台上完成CPT（电荷，宇称和时间常数）对称性和洛伦兹不变性的测试。 这个实验探索了粒子物理学标准模型之外的物理学。第二个实验使用这个双磁力计将寻找核自旋相关的力量。 进一步的实验，使用铯和氙-129制成的双磁力计将用于寻找永久电子和核电偶极矩（EDM）。一个有限的EDM将是一个超越标准模型的CP（电荷和宇称）违反的签名。 此外，将开发基于自旋交换弛豫自由（SERF）碱金属蒸气的新磁力测量技术，目标是实现比当今最佳磁场灵敏度高一个数量级的磁场灵敏度。该项目的更广泛影响包括开发可用于脑成像、电子物理学、爆炸物探测和惯性导航的超灵敏磁力计新技术。此外，它将促进从K-12到博士后的各级科学教育。