Canted Undulator Upgrade for GeoSoilEnviroCARS Sector 13 at the Advanced Photon Source

这项奖励是根据2009年《美国复苏和再投资法案》(公法111-5)资助的。这项提案寻求约76.7万美元(约为所需资金的1/3)，用于实施用于同步加速器研究的GeoSoilEnviroCARS(GSECARS)国家用户设施的倾斜波浪器升级。此次升级的部分支持(2/3费用)将分别由NASA和美国能源部授予。这次升级将提供新的能力和两倍的可用射束时间。这次升级将在倾斜的几何结构中安装一个新的波动系统，该系统将反过来提供两个独立的X射线源。一个波荡器将针对较低的能量(2.3-23keV)进行优化，并专门用于详细的物种形成和微探针轻元素和重元素成分研究。另一个波荡器将被配置为更高的能量(5.6-80keV)，并将应用于高压和表面散射研究。GSECARS的新光束线配置将用于高压矿物物理和化学、高压非和纳米晶体工作、热液流体化学、矿物-水界面生物地球化学、岩浆氧化态研究、流体和固体流动动力学以及外星物质研究。此次升级将提供钻石砧座或大容量压力机的高压和高温光谱和结晶学、单晶和粉末界面衍射、非弹性X射线散射、X射线吸收精细结构(XAFS)光谱、X射线微探针分析和显微断层扫描。该设施在社区中有广泛的用途。GSECARS每年提供400多次用户访问。在目前的光束线上进行的一系列研究跨越了一系列具有相当大社会影响的地球科学学科。***

0841622RiversThis award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). This proposal seeks ~$767K (~1/3 of the total needed) in funding to implement a canted undulator upgrade for the GeoSoilEnviroCARS (GSECARS) national user facility for synchrotron research. Partial support (2/3 cost) for this upgrade will be separately awarded from NASA and DOE. The upgrade will provide new capabilities and double available beam time. The upgrade will install a new undulator system in a canted geometry which will, in turn provide two independent x-ray sources. One undulator will be optimized for lower energies (2.3-23 keV) and be dedicated for detailed speciation and microprobe light and heavy elemental compositional research. The other undulator will be configured for higher (5.6-80 keV) energies and will be applied to high-pressure and surface scattering research. The new beamline configuration at GSECARS will be used for high-pressure mineral physics and chemistry, high-pressure non- and nano-crystalline work, hydrothermal fluid chemistry, mineral-water interface biogeochemistry, magma oxidation state research, fluid and solid flow dynamics, and extraterrestrial materials research. The upgrade will provide access to diamond anvil cell or large volume press high-pressure and high-temperature spectroscopy and crystallography, single-crystal and powder interface diffraction, inelastic x-ray scattering, x-ray absorption fine structure (XAFS) spectroscopy, x-ray microprobe analysis, and microtomography. The facility has broad community usage. GSECARS offers 400+ user-visits per year. The array of research conducted on current beamlines spans a range of geoscience disciplines with considerable societal impacts. ***