NMR superconducting magnet repair

核磁共振（NMR）光谱是应用于物理、化学、生物和医学领域的最强大的分析工具之一。然而，核磁共振方法的缺点是其灵敏度较弱，限制了其适用性。由于这个原因，核磁共振还不是一个非常有用的工具来表征材料的固体表面。近年来已经证明，利用激光光泵浦方法可以实现氙气体的高自旋极化。氙极化可以转移到材料表面的选定原子核上，从而产生较大的表面核磁共振信号。在实际应用中，超极化氙表面核磁共振要想得到广泛应用，还需要克服许多障碍。我们一直在NSERC的资助下开发这样一个系统。本提案是为修复超导磁体申请资金，超导磁体是我们核磁共振系统的重要组成部分。没有磁铁，我们就无法继续在这个领域的研究。

Nuclear magnetic resonance (NMR) spectroscopy is one of the most powerful analytical tools used in the fields of physics, chemistry, biology and medical sciences. However, a drawback of the NMR method is that its applicability is limited by its weak sensitivity. For this reason, NMR has not been a very useful tool for characterizing the solid surfaces of materials. In recent years it has been demonstrated that high-spin polarization of xenon gas can be achieved by optical pumping methods using lasers. The xenon polarization can be transferred to selected nuclei at the surface of a material, resulting in a large surface NMR signal. In practice, there are a number of hurdles to overcome before hyperpolarized xenon surface NMR can be widely applied. We have been developing such a system with financial assistance from NSERC. This proposal is a request for fundng to repair a superconducting magnet, which is an essential component of our NMR system. Without the magnet, we are unable to continue research in this area.