MRI: Acquisition of a Multi-collection Detector System for the Cameca IMS 1280 in the Northeast National Ion Microprobe Facility

MRI：为东北国家离子微探针设施的 Cameca IMS 1280 购买多采集探测器系统

• 批准号: 2216262
• 负责人: Glenn Gaetani
• 金额: $ 99.97万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2216262&HistoricalAwards=false
• 关键词: MRI; Acquisition; Multi; collection; Detector

This Major Research Instrumentation (MRI) Program award provides funds to upgrade the Cameca IMS 1280 ion microprobe operated by the Northeast National Ion Microprobe Facility (NENIMF) with a multi-collection detector. Secondary ion mass spectrometry (SIMS) is a powerful micro-analytical technique for determining the elemental and isotopic compositions of solid materials that has broad applications to earth, ocean, and planetary sciences. The NENIMF has operated as a highly productive, NSF-supported National Facility for twenty-six years and is equipped with instrumentation and personnel that are ideally suited to help the geoscience community take full advantage of multi-collector SIMS. An IMS 1280 upgraded with multi-collection capability would complete the NENIMF as a cutting-edge SIMS facility serving the US geoscience community for a fraction of the cost of purchasing a new Cameca IMS 1300-HR3 (~$7 million). The mono-collection NENIMF IMS 1280 has established an important niche in the geoscience community as a major source of high-quality data on volatile element concentrations in silicate glasses, glass inclusions, and nominally anhydrous minerals. The upgrade to multi-collection will be leveraged by combining this existing expertise with the capability to analyze light stable isotopes on the same spots and, thereby, allow us to provide exciting and innovative new SIMS applications for users of the facility. The proposed upgrade would greatly enhance studies of pre-eruptive magmatic volatiles, which represent an important control on volcano explosivity, as well as volatiles (especially sulfur) in the solid Earth, cosmochemistry, oxygen isotope thermometry, biogenic carbonates, and biogeochemistry.The Cameca IMS 1280 is a double focusing mass spectrometer with a large radius magnetic sector, and ion optics optimized to attain a mass resolving power of 6000 without significant loss of secondary ion intensity. Starting in 1998, an increasing number of IMS 1270/1280 ion microprobes have been equipped with the capability to measure up to five isotopes simultaneously (multi-collection). Multi-collection has a number of significant advantages over mono-collection. First, it increases the efficiency of data collection and – thereby – minimizes the effect of instrumental drift. For example, the time required to determine the isotopic composition of S in sulfides or O in silicates is decreased from approximately 12 minutes per spot using mono-collection to only 4 minutes per spot by multi-collection. This leads to significant improvements in accuracy and reproducibility because instrumental drift can be corrected for through a much higher frequency of standard analyses between samples. Second, the ability to measure multiple isotopes simultaneously leads to a significant increase in data quality by minimizing the effects of instability and drift of the primary ion beam. For example, the 32S/34S measurements on sulfide standards on the NENIMF mono-collection system have a typical precision of 0.07-0.12 ‰ 2RSE (relative standard error) and a spot to spot reproducibility (accuracy) of ~0.6 ‰ 2RSD (relative standard deviation). Multi-collector analysis on the same standards have a precision of 0.02-0.03 ‰ 2RSE and accuracy 0.1 ‰ 2RSD. Third – and most importantly – multi-collection allows for high-precision in situ analysis of stable isotopes of light elements such as H, C, O, S, and Cl.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.

该重大研究仪器 (MRI) 计划奖项提供资金来升级由东北国家离子微探针设施 (NENIMF) 运行的 Cameca IMS 1280 离子微探针，该探针具有多收集二次离子质谱 (SIMS) 检测器，是一种功能强大的微分析仪。 NENIMF 是一种测定固体材料的元素和同位素组成的技术，在地球、海洋和行星科学领域有着广泛的应用。 NSF 支持国家设施 26 年，配备了非常适合帮助地球科学界充分利用多收集器 SIMS 的仪器和人员。升级为多收集器功能的 IMS 1280 将完善 NENIMF。尖端 SIMS 设施，为美国地球科学界提供服务，其成本只是购买新 Cameca IMS 1300-HR3 的一小部分（约 700 万美元）。 IMS 1280 作为硅酸盐玻璃、玻璃夹杂物和名义无水矿物中挥发性元素浓度的高质量数据的主要来源，在地球科学界建立了重要的地位。通过结合现有的专业知识，将充分利用多收集的升级。能够分析同一地点的光稳定同位素，从而使我们能够为该设施的用户提供令人兴奋和创新的新 SIMS 应用程序。拟议的升级将大大加强对喷发前岩浆的研究。挥发物，它代表着对火山爆发的重要控制，以及固体地球中的挥发物（特别是硫）、宇宙化学、氧同位素测温、生物碳酸盐和生物地球化学。 Cameca IMS 1280 是一款大半径双聚焦质谱仪磁扇区和离子光学经过优化，可实现 6000 的质量分辨率，而不会显着损失二次离子强度。 1998 年，越来越多的 IMS 1270/1280 离子微探针具备同时测量多达 5 种同位素的能力（多重收集）。 多重收集与单一收集相比具有许多显着优势。数据收集的效率以及 – – 最大限度地减少仪器漂移的影响 例如，从而减少了确定硫化物中的硫或硅酸盐中的氧的同位素组成所需的时间。从使用单一采集的每个点大约 12 分钟到使用多重采集的每个点仅需 4 分钟，这导致了准确性和再现性的显着提高，因为可以通过样品之间更高频率的标准分析来校正仪器漂移。同时测量多种同位素的能力可以最大限度地减少主离子束的不稳定性和漂移的影响，从而显着提高数据质量，例如，NENIMF 上硫化物标准品的 32S/34S 测量。单收集系统的典型精度为 0.07-0.12 ‰ 2RSE（相对标准误差），点间重现性（准确度）为 ~0.6 ‰ 2RSD（相对标准偏差）。 0.02-0.03 ‰ 2RSE 和精度 0.1 ‰ 2RSD 第三 – 也是大多数。重要的是，多重收集可以对 H、C、O、S 和 Cl 等轻元素稳定同位素进行高精度原位分析。该奖项反映了 NSF 的法定使命，并通过使用基金会的评估进行评估，被认为值得支持。智力价值和更广泛的影响审查标准。