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

0841622河流这个奖项是根据2009年美国复苏和再投资法案（公法111-5）资助。该提案寻求约76.7万美元（约占所需总额的1/3）的资金，用于为同步加速器研究的GeoSoilEnviroCARS（GSECARS）国家用户设施实施倾斜波荡器升级。此次升级的部分支持（2/3成本）将分别由NASA和DOE提供。升级将提供新的能力和双倍的可用射束时间。升级将安装一个倾斜几何形状的新波荡器系统，这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能量（2.3-23千电子伏）进行优化，并专门用于详细的物种形成和微探针轻、重元素成分研究。另一个波荡器将配置为更高的能量（5.6-80千电子伏），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、高压非晶体和纳米晶体工作、热液流体化学、矿物-水界面地球化学、岩浆氧化状态研究、流体和固体流动动力学以及地外物质研究。此次升级将提供金刚石对顶砧或大容量压机高压和高温光谱学和晶体学、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）光谱学、X射线微探针分析和显微断层扫描。该设施具有广泛的社区用途。GSECARS每年提供400+次用户访问。对当前光束线进行的一系列研究跨越了一系列地球科学学科，具有相当大的社会影响。***

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. ***