Facility Support: For The Northeast National Ion Microprobe Facility (NENIMF)

这笔赠款支持东北国家离子微探测器设施(NENIMF)作为服务于地球科学界的国家二次离子质谱仪(SIMS)设施继续运作。与其他微量分析技术相比，SIMS的主要优势在于其高空间分辨率，以及高精度测量氢、锂、硼、碳、氮和氧等轻元素的浓度和同位素组成的能力。NENIMF的分析能力和专门知识集中在两个领域：测定硅酸盐玻璃中的岩浆挥发分，分析作为气候变化及其对海洋生物影响的记录的生物成因碳酸盐，使NENIMF成为地球科学界独特的跨学科资源，与其他国家SIMS设施的重叠最小。自2011年1月以来，NENIMF已经接纳了来自47个不同机构的93名用户，其中14名用户来自美国以外的机构。在过去的22年里，NENIMF利用收集的数据发表了328篇同行评议的科学论文，平均每年发表15篇。NENIMF配备了两台Cameca SIMS仪器：一台IMS 1280和一台IMS 3f。IMS 1280是一种双聚焦质谱仪，具有大半径磁扇区(585 Mm)，并优化了离子光学，以获得6000的质量分辨率(MRP=M/增量M)，而不会显著损失二次离子强度。IMS 3f是一种具有小半径磁扇区的双聚焦质谱仪，自1978年以来一直用于广泛的地球化学研究，并已升级为基于Linux的计算机，通过基于LabVIEW的软件(LabSIMS)控制许多组件。这两项工具与NENIMF的技术和科学专长相结合，为地球科学界提供了独特的资源。过去5年，与岩浆挥发分有关的出版物占NENIMF总数的69%，而13%的出版物侧重于生物成因碳酸盐。除了这些专业领域外，NENIMF的用户还利用Cameca IMS1280研究了一系列主题，包括MORB玻璃和俯冲带矿物中的B同位素、金红石地球测速中的Zr、钛在石英中的扩散以及独居石和锆石的U-Th-Pb测年。NENIMF在过去几年开发的新分析方案包括对低浓度玄武岩玻璃中硼的同位素组成进行高精度分析，以及测定副矿物磷灰石中的D/H。对NENIMF的支持以几种不同的方式满足了NSF更广泛的影响标准。在促进教学、培训和学习的同时促进发现和理解，并通过本科生、研究生和博士后的参与扩大未被充分代表的群体的参与。WHOI本科生暑期学生研究员、博士后学者和WHOI/MIT联合项目研究生专门针对与NENIMF人员和WHOI教师密切参与SIMS技术的研究项目。通过年度短期课程鼓励年轻科学家参与基于SIMS的研究。通过向来自不同学科的科学家和学生提供我们现有的分析平台以及NENIMF人员在资助期间将开发的分析平台，加强了研究和教育的基础设施。研究成果被广泛传播，通过使用该设施产生的平均每年15篇出版物来增进对科学技术的理解。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。

This grant supports the continued operation of the Northeast National Ion Microprobe Facility (NENIMF) as a National Secondary Ion Mass Spectrometry (SIMS) Facility serving the geoscience community. The principal strengths of SIMS relative to other micro-analytical techniques are its high spatial resolution and the capability for high-precision measurements of both concentration and isotopic composition of light elements such as hydrogen, lithium, boron, carbon, nitrogen, and oxygen. The analytical capabilities and expertise of the NENIMF are focused in two areas: determination of magmatic volatiles in silicate glasses and analysis of biogenic carbonates as records of climate change and its impacts on marine organisms, making the NENIMF a unique interdisciplinary resource to the geosciences community, with minimal overlap to the other National SIMS Facilities. Since January 2011, the NENIMF has accommodated 93 users from 47 different institutions, including 14 users from institutions outside the United States. Over the past 22 years, a total of 328 peer reviewed scientific papers have been published using data collected at the NENIMF for an average of 15 publications per year.The NENIMF is equipped with two Cameca SIMS instruments: an IMS 1280 and an IMS 3f. The IMS 1280 is a double focusing mass spectrometer with a large radius magnetic sector (585 mm), and ion optics optimized to attain a mass resolving power (MRP= M/delta M) of 6,000 without significant loss of secondary ion intensity. The IMS 3f is a double focusing mass spectrometer with a small radius magnetic sector that has been used for a wide spectrum of geochemical studies since 1978 and has been upgraded to Linux-based computer control of many components via Labview-based software (LabSIMS). The combination of these 2 instruments and the technical and scientific expertise of the NENIMF provides the geoscience community with a unique resource. Publications related to magmatic volatiles comprised 69% of the NENIMF total over the past 5 years, while 13% were focused on biogenic carbonates. In addition to these areas of specialization, NENIMF users have taken advantage of the Cameca IMS 1280 to work on a range of topics that include B isotopes in MORB glasses and subduction zone minerals, Zr in rutile geospeedometry, Ti diffusion in quartz, and U-Th-Pb dating of monazite and zircon. New analytical protocols developed at the NENIMF over the past few years include high-precision analysis of the isotopic composition of boron in low concentration basaltic glasses, and determination of D/H in the accessory mineral apatite. Support for the NENIMF meets the NSF Broader Impacts criteria in several different ways. Discovery and understanding are advanced while promoting teaching, training, and learning and participation of underrepresented groups is broadened through the involvement of undergraduates, graduate students, and postdocs. WHOI Undergraduate Summer Student Fellows, Postdoctoral Scholars, and WHOI/MIT Joint Program graduate students are specifically targeted for involvement in research projects with NENIMF personnel and WHOI faculty in which they are intimately involved with SIMS techniques. Involvement of young scientists in SIMS-based research is encouraged through annual short-courses. Infrastructure for research and education are enhanced through making both our existing analytical platforms, and those to be developed by the NENIMF personnel during the funding period, available to scientists and students from diverse disciplines. Research results are disseminated broadly to enhance scientific and technological understanding through an average of 15 publications per year that result from use of the facility.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.