Development of a Tender-Energy Microspectroscopy and Imaging User Facility for Earth Sciences at NSLS and NSLS-II

NSLS 和 NSLS-II 地球科学招标能源显微光谱和成像用户设施的开发

• 批准号: 1128957
• 负责人: Paul Northrup
• 金额: $ 22.56万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-04-01 至 2016-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1128957&HistoricalAwards=false
• 关键词: Development; Tender; Energy; Microspectroscopy; Imaging

This project will create a new, unique synchrotron-based user facility to examine geologic materials at the micron scale with a focused X-ray beam tuned specifically for lighter elements Na through Ti. This facility is designed and optimized for "tender" (1-8 keV energy) X-ray micro-spectroscopy and imaging applications for Earth Science research, and will complement existing and highly productive "hard" X-ray facilities operating above about 4.5 keV. It will extend to lower energies the X-ray fluorescence (XRF) and X-ray absorption spectroscopy (XAS) capabilities typical of hard X-ray microprobes, as element-specific non-invasive probes of elemental distribution and local physical and electronic structures and states in crystalline and non-crystalline materials. In addition, it will offer advanced capabilities for microbeam extended X-ray absorption spectroscopy (EXAFS) for determination of more detailed local structure around the selected element. This project will be undertaken by adding new micro-focusing capabilities at an established and proven macro-focused (~1mm spot size) tender-energy XAS beamline at X15B of the National Synchrotron Light Source (NSLS) at Brookhaven National Laboratory, and will subsequently transition to the new Tender Energy Spectroscopy (TES) beamline under development at NSLS-II. Its key attributes will be the distinct 1 to 8 keV energy range, user-tunable spot size from about 50 microns to 1 micron, high flux and stability optimized for high-quality and extended XAS, options for both XRF and XAS mapping with rapid scanning, and a helium glove-box sample environment. Performance will improve when transferred to NSLS-II, a state-of-the-art new Synchrotron designed for high brightness applications. These new capabilities are critical for advancing our knowledge of geochemical and biogeochemical processes, in particular those involving lighter elements, and will be openly available for use through the NSLS General User program. Specific applications targeted include the mineral-water interface, nutrients and contaminants, carbonates, paleoclimate, redox processes, high-pressure mineralogy; and health effects of Earth materials.

该项目将创建一个新的，基于同步加速器的新型用户设施，以微米尺度检查地质材料，以专门针对较轻的元素Na通过Ti调节的X射线梁。 该设施是针对“招标”（1-8 KEV Energy）X射线微光谱和地球科学研究的成像应用的设计和优化的，并将补充现有且高效的“硬” X射线设施，在大约4.5 KEV上运行。 它将扩展到较低的能量，X射线荧光（XRF）和X射线吸收光谱（XAS）功能典型的硬X射线微探针作为元素特异性的非侵入性探针，元素分布，局部物理和电子结构以及晶体和非晶体材料中的局部物理和电子结构以及状态。 此外，它将为微孔扩展X射线吸收光谱（EXAFS）提供高级功能，以确定所选元素周围更详细的本地结构。 该项目将通过在Brookhaven国家实验室的National Synchrotron光源（NSLS）的X15B上添加新的微量焦点XAS光束线上添加新的微量焦点（〜1mm斑点尺寸）柔性能源XAS束线，随后将过渡到新的柔性能量光谱（TEREPSTROSCOPPOY）。 它的关键属性将是独特的1到8 KEV能量范围，可用户可调的点大小从约50微米到1微米，高通量和稳定性优化，可针对高质量和扩展的XAS进行优化，XRF和XAS映射的选项以及快速扫描以及Helium Glove-Box-box样品环境。 当转移到NSLS-II时，性能将有所改善，NSLS-II是一种最先进的新同步加速器，专为高亮度应用而设计。 这些新功能对于促进我们对地球化学和生物地球化学过程的知识，尤其是涉及较轻元素的知识至关重要，并且将公开使用NSLS一般用户程序。 针对的特定应用包括矿物质水界面，营养和污染物，碳酸盐，古气候，氧化还原过程，高压矿物学；和地球材料的健康影响。