GOALI: Synchronously Pumped NMR Oscillator

该奖项是威斯康星大学麦迪逊分校与诺斯罗普-格鲁曼公司的科学家和工程师之间的一个产学合作项目，展示了一种使用惰性气体核的新型核磁共振。 基本的创新是使用集成的原子磁力计来获得最佳的信噪比，同时极大地抑制磁力计引入的潜在误差。该谐振器对于自旋相关对称性破坏测试的研究具有根本意义，并且对于改进NMR陀螺仪的最新技术具有实际意义。新方法的关键是同步自旋交换光泵浦的概念，其中磁力计原子和原子核以相同的频率进动。 技术噪声的估计表明，该系统具有优于1 nHz/ Hz的潜在频率噪声水平，基本限制要好得多。该振荡器将被用来对潜在的暗物质候选者与原子核的潜在耦合设置新的严格限制。谐振器也将被评估用作精密NMR陀螺仪。虽然这里的发展代表了一个实质性的新方法，NMR振荡器，产学合作将允许与传统的NMR振荡器技术的工业专业知识，以加速开发的杠杆作用。除了本科生和研究生的正常学术研究培训，该项目提供了大量的接触，学生工业科学家和工程师在研发环境中工作。学生受益于电子，磁场和热设计等领域的工业专业知识。 正在进行的工作既有基础又有实际应用，将特别评估核磁共振器在导航方面的潜在应用

This award, an Industry-University Collaborative Project between the University of Wisconsin-Madison and scientists and engineers at Northrop-Grumman Corporation, demonstrates a new type of nuclear magnetic resonance using noble-gas nuclei. The essential innovation is to use an integrated atomic magnetometer to get the best signal-to-noise ratio, while greatly suppressing potential errors introduced by the magnetometer. The resonator is of fundamental interest for searches for spin-dependent symmetry violation tests, and of practical interest in improving the state-of-the-art in NMR gyroscopes. The key to the new approach is the concept of synchronous spin-exchange optical pumping, wherein the magnetometer atoms and the nuclei are made to precess at the same frequency. Estimates of technical noise indicate the system has a potential frequency noise level of better than 1 nHz/ Hz, with fundamental limits that are much better. The oscillator will be used to set new stringent limits on the potential couplings of potential dark matter candidates to nuclei. The resonator will also be evaluated for use as a precision NMR gyro. While the developments here represent a substantially new approach to NMR oscillators, the Industry-University collaboration will allow industrial expertise with conventional NMR oscillator technology to be leveraged for accelerated development.In addition to the normal academic research training of undergraduate and graduate students, the project provides substantive exposure of students to industrial scientists and engineers working in an R&D environment. Students benefit from industrial expertise in areas such as electronics, magnetic field, and thermal design. The work being pursued has both fundamental and practical applications and the nuclear magnetic resonator will be evaluated in particular for potential applications to navigation