MRI: Acquisition of a Thermal Ionization Mass Spectrometer (TIMS) for Multi-disciplinary Research and Student Training at UH

该奖项支持购买最先进的热电离质谱仪（TIMS），用于同位素测量，适用于地球科学领域的各种尖端研究项目。该仪器将被整合到夏威夷大学马诺阿分校（UHM）现有的同位素实验室。一个由科学家组成的跨学科小组，从学生到隶属于UHM和全国和国际其他组织的高级研究人员，将使用TIMS进行地球和海洋科学的开创性研究，如火山过程和海平面上升。TIMS的现代技术将使我们的用户能够以更高的精度进行测量，同时显着减少所需的样品材料，并显着增加可以解决的研究应用。该仪器将用于培训下一代同位素研究人员，延续UHM成功教育学生和博士后学者的悠久传统。PI积极参与部门的努力，以增加代表性不足的群体的STEM参与，为REU课程的本科生提供同位素研究培训。现代TIMS将从根本上改变夏威夷大学马诺阿分校的同位素研究能力。该仪器将采用两种主要的新型技术：（1）一套法拉第电流放大器，可以精确测量小离子束，以及（2）多离子计数（MIC）能力。这些新功能将通过以下方式带来令人兴奋的新研究机会：（1）显著地减少样品尺寸，（2）在宽范围的样品尺寸下为法拉第检测器同位素测量提供最高可实现的精度，提高时间分辨率（由于样本量较小和计数统计更好）使用MIC代替单个离子计数器上的低效峰跳跃进行系列同位素测量。该仪器将用于测量Sr-Nd-Pb放射性同位素比值、Cd稳定同位素比值和U衰变系列短寿命同位素比值。这些同位素系统将用于对岩浆过程和火山内部结构、地壳和地幔的组成、结构和动力学、最近人类和地质历史上重大事件的年表，如火山爆发和海平面变化的珊瑚档案，该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This award supports the acquisition of a state-of-the-art Thermal Ionization Mass Spectrometer (TIMS) for isotopic measurements applicable to a wide range of cutting-edge research projects in the Geosciences. The instrument will be integrated into the existing Isotope Lab of the University of Hawai‘i at Mānoa (UHM). An interdisciplinary group of scientists, ranging from students to senior researchers affiliated with UHM and other organizations nationwide and internationally, will use the TIMS for ground-breaking research in Earth and Ocean sciences, such as volcanic processes and sealevel rise. The modern technology of the TIMS will allow our users to make measurements at up to an order of magnitude better precision, while significantly reducing the sample material needed, and dramatically increasing the research applications that can be addressed. This instrument will be used to train the next generation of isotope researchers, continuing a long tradition of successfully educating students and post-doctoral scholars at UHM. The PIs actively participate in department efforts to increase STEM participation by underrepresented groups, offering isotope research training to undergraduates in REU programs.A modern TIMS will fundamentally transform the capabilities for isotope research at the University of Hawai‘i at Mānoa. This instrument will feature two major new types of technology: (1) a suite of Faraday current amplifiers that allow for the precise and accurate measurement of small ion beams, and (2) multiple ion counting (MIC) capability. Together these new features will enable exciting new research opportunities by: (1) significantly reducing sample sizes, (2) providing the highest achievable precision for Faraday detector isotopic measurements at a wide range of sample sizes, and (3) improving temporal resolution (due to smaller sample sizes and better counting statistics) for U-series isotopic measurements using MIC instead of inefficient peak jumping on a single ion counter. The instrument will be used to measure Sr-Nd-Pb radiogenic isotope ratios, Cd stable isotope ratios, and ratios of the short-lived isotopes of the U decay series. These isotopic systems will be used to perform cutting-edge research into the magmatic processes and the internal structure of volcanoes, the composition, structure, and dynamics of the Earth’s crust and mantle, the chronology of significant events through recent human and geological history, such as volcanic eruptions and coral archives of sea level change, and the interaction between ocean water masses and groundwater pathways.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.