MRI: Development of a high precision ion microscope for geosciences applications

MRI：开发用于地球科学应用的高精度离子显微镜

• 批准号: 1429794
• 负责人: Kevin McKeegan
• 金额: $ 369.63万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-09-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1429794&HistoricalAwards=false
• 关键词: MRI; Development; precision; ion; microscope

The funding of this proposal will support the development of a new high-resolution, high-sensitivity ion microscope to serve as the prime instrument of the UCLA/NSF national, multi-user facility for secondary ion mass spectrometry (SIMS) research in the geosciences. The UCLA laboratory has served as a world-class facility for in situ microscale isotopic analyses of geologic materials for 18 years. The Principal Investigators will continue their programs of research training for graduate students (both at UCLA and elsewhere) and young postdoctoral scholars. In addition, they will continue their popular and effective outreach and inreach workshops for SIMS training of the next generation of geoscientists. The Principal Investigators and UCLA scientists and students continue to be involved in synergistic activities both locally and nationally, including professional activities and K-12 education and public outreach.The central research tool of the UCLA National Ion Microprobe Facility has been the CAMECA ims 1270, the first commercial large-radius SIMS built by CAMECA instruments in consultation with UCLA scientists 23 years ago. Although the ims 1270 has been upgraded over the years, it is no longer state-of-the-art, and in several important research areas the ability to innovate and to undertake new types of investigations is limited by the instrument's technical capabilities. The PIs propose to partner with two instrument manufacturers (CAMECA, Oregon Physics) to develop a new ion microscope that will have (1) high brightness ion sources, (2) improved lateral spatial resolution, (3) improved mass resolving power, (4) improved throughput speed and sample capacity, (5) improved detector sensitivity and linearity leading to higher precision and accuracy in isotopic analyses, and (6) improved reliability. Although this development will be done cooperatively with two commercial entities, UCLA scientists and engineers will accomplish the overall design and implementation.

这项提议的资金将支持开发一种新的高分辨率、高灵敏度的离子显微镜，作为加州大学洛杉矶分校/国家科学基金会国家多用户设施的主要仪器，用于地球科学中的二次离子质谱学研究。18年来，加州大学洛杉矶分校的实验室一直是进行地质材料原位微量同位素分析的世界级设施。首席调查人员将继续为研究生(包括加州大学洛杉矶分校和其他地方)和年轻的博士后学者进行研究培训。此外，它们还将继续开展广受欢迎和有效的外联活动，并为培训下一代地球科学家举办模拟模拟人生培训讲习班。首席研究人员、加州大学洛杉矶分校的科学家和学生继续参与当地和全国的协同活动，包括专业活动、K-12教育和公众考察。加州大学洛杉矶分校国家离子微探测器设施的中心研究工具一直是Cameca IMS 1270，这是23年前由Cameca仪器与加州大学洛杉矶分校的科学家协商制造的第一个商用大半径SIMS。尽管IMS 1270经过多年的升级，但它不再是最先进的，在几个重要的研究领域，创新和进行新型调查的能力受到该仪器的技术能力的限制。PIS建议与两家仪器制造商(俄勒冈州Cameca物理公司)合作开发一种新型离子显微镜，该显微镜将具有(1)高亮度离子源，(2)提高横向空间分辨率，(3)提高质量分辨率，(4)提高吞吐速度和样品容量，(5)改善探测器灵敏度和线性度，从而提高同位素分析的精确度和准确度，以及(6)提高可靠性。虽然这项开发将与两个商业实体合作完成，但加州大学洛杉矶分校的科学家和工程师将完成整体设计和实施。