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.

该精确测量项目采用自旋极化气体来解决粒子物理的基本问题。 具体来说，该项目将着重于完成CPT（电荷，奇偶校验和时间逆转）对称性的测试和Lorentz的不变性，该测试是使用放置在旋转平台上的钾和氦3制成的双磁力表。 该实验超出了粒子物理学的标准模型以外的物理学。使用该双磁力计的第二个实验将搜索核自旋依赖性力。 进一步的实验，使用由铯和Xenon-129制成的双磁力计来搜索永久性电子和核电偶极矩（EDMS）。有限的EDM将是标准模型以外的CP（费用和平等）违规的签名。 此外，将开发基于自旋交换松弛（SELF）Alakli-Metal蒸气的新磁力计，其目标是实现磁场灵敏度的目标，比当今可用的最佳磁场灵敏度高的数量级。该项目的更广泛影响包括开发新技术的超敏感磁力计，可用于大脑成像，地球物理，爆炸性检测和惯性导航。此外，它将促进从K-12到博士后的各个级别的科学教育。