Equipment: Helium Recovery Equipment for a Regional NMR and EPR Laboratory at Wayne State University

在化学系的支持下，韦恩州立大学(WSU)的切克梅内夫教授正在实施一个封闭式氦回收系统，以支持三台共用的研究用核磁共振仪器、一台教学核磁共振仪器和一台7特斯拉傅里叶变换离子回旋共振质谱仪(FT-ICR MS)。这些仪器被用来识别和表征分子，是必不可少的研究工具。这些仪器使用需要液氦来维持其磁场的高场超导磁体。氦--一种不可再生的自然资源--在全球范围内短缺，这对我们保持这些磁铁的能力产生了负面影响。氦回收系统将减少由此产生的不确定性，使密歇根州立大学在合成化学、生物化学、催化、食品科学、生物医学科学和技术、微电子/传感和生物材料等领域的研究继续走在科学的前沿。闭环系统将从与密歇根州立大学化学系设施的核磁共振和质谱仪相关的超导磁铁中捕获氦。收集的气体将被暂时储存在中压储罐中，然后在中央加气站进行液化，然后转移到单独的移动杜瓦容器中，用于磁体填充。回收速度将受到监控，并报告给NSF。预计会有很高的复苏速度。循环利用珍贵的He来维持WSU化学的核磁共振和MS仪器的能力，将有助于推动不同学生群体的招募和培训，作为该系研究和教学任务的组成部分。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

With support from the Division of Chemistry, Professor Chekmenev at Wayne State University (WSU) is implementing a closed helium recovery system to sustain three shared research Nuclear Magnetic Resonance (NMR) instruments, one teaching NMR instrument, and a 7-Tesla Fourier Transform Ion Cyclotron Resonance Mass Spectrometer (FT-ICR MS). The instruments are used to identify and characterize molecules and are essential research tools. These instruments utilize high-field superconducting magnets that require liquid helium to maintain their fields. There is a global shortage of helium – a non-renewable natural resource – which has negatively impacted our ability to maintain these magnets. The helium recovery system will mitigate resulting uncertainty, enabling continuation of WSU research at the forefront of science in the fields of synthetic chemistry, biological chemistry, catalysis, food science, biomedical sciences and technology, microelectronics/sensing, and biomaterials.A closed-loop system will capture helium from the superconducting magnets associated with the NMR and mass spectrometry instruments in the WSU chemistry department facility. The collected gas will be temporarily stored in medium-pressure tanks before being liquified at a centralized station and then transferred to a separate mobile Dewar receptacle to be used for magnet fills. the recovery rate will be monitored and reported to NSF. A high rate of recovery is expected. The ability to recycle precious He to sustain the NMR and MS instruments at WSU Chemistry will help drive the recruitment and training of a diverse group of students as an integral part of the research and teaching missions of the department .This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.