Facility Support: High-Resolution X-ray Computed Tomography Laboratory

设施支持：高分辨率X射线计算机断层扫描实验室

• 批准号: 1561622
• 负责人: Richard Ketcham
• 金额: $ 52.23万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-05-01 至 2018-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1561622&HistoricalAwards=false
• 关键词: Facility; Support; Resolution; ray; Computed

1561622KetchamThis Division of Earth Sciences Instrumentation and Facilities Program grant supports continued operation of the University of Texas Computed X-ray Tomography (UTCT) Facility over a two year period. The CT scanner at UT was specifically designed to enable x-ray tomography of a range of geological materials and sample sizes. The technology was developed from commercial biomedical CAT scanners with the adoption of a higher energy x-ray source and higher resolution CCD detectors to allow micron-scale imaging of geological samples. The technique allows for completely non-destructive imaging of the exteriors and interiors of samples. Differences in x-ray attenuation that occur due to variations in sample density and the elemental composition of the material along the x-ray path are digitally recorded by a CCD. Samples are mounted on a rotating table in front of the x-ray source. Radial 2-d slices of the attenuated x-rays are stacked by vertical translation of the sample table. Resultant x-ray sinograms are then reduced via computer algorithms to render high resolution 3-D images of the density distributions within samples. A recent upgrade of the UTCT high energy system has increased both resolution and scanning speed, lowering costs for lab clients and opened a multitude of new research possibilities. In particular, it enables 4-D scanning of systems in motion (during fluid flow, cooling, heating, strain, etc.). Exploration and exploitation of these new capabilities for an expanded range of studies including studies of fluid flow through fractured and porous media with relevance to groundwater hydrology, hydrocarbon reservoir extraction enhancement and carbon dioxide subsurface sequestration will be enabled by this renewal award. Continued support will benefit a large and diverse set of research constituencies. Over the previous period of support, UTCT has served over 190 principal investigators, most of whom are Earth scientists spanning the full breadth of subdisciplines, including petrology, paleontology, structural geology, hydrology, meteoritics, and economic and petroleum geology. UTCT's clientele also includes many researchers in other fields, principally biology, engineering, and anthropology. Three-quarters of investigators were from outside the University of Texas. The facility will continue to support user training through developed short courses and assist users in data reduction routines. This support is congruent with NSFs mission of promoting the progress of science and may advance the national prosperity and welfare through advancing knowledge of the behavior of water and hydrocarbon in the subsurface as well training students in cutting edge analytical methods in the sciences.***

1561622 Ketchamthis Timenter of Earth Sciences仪器和设施计划授权支持得克萨斯大学计算机X射线断层扫描（UTCT）设施的持续运作。 UT的CT扫描仪是专门设计的，以实现一系列地质材料和样本量的X射线断层扫描。该技术是从采用较高能量X射线源和更高分辨率CCD检测器的商业生物医学猫扫描仪开发的，以允许对地质样品进行微米级成像。该技术允许对样品的外部和内部进行完全无损的成像。 CCD将由于样品密度变化和沿X射线路径的材料的元素组成而发生的X射线衰减差异。样品安装在X射线源前方的旋转桌上。减弱的X射线的径向2-D切片被样品表的垂直翻译堆叠在一起。然后，通过计算机算法减少所得的X射线正式图，以呈现样品中密度分布的高分辨率3-D图像。最近对UTCT高能系统的升级提高了分辨率和扫描速度，降低了实验室客户的成本，并开放了许多新的研究可能性。特别是，它可以对运动中的系统进行4-D扫描（在流体流动，冷却，加热，应变等期间）。对这些新能力的探索和剥削，以扩大研究范围的研究，包括通过断裂和多孔培养基的流体流量进行研究，与地下水水文，碳氢化合物储层提取增强和二氧化碳地下序列将由该续集奖励。持续的支持将使大量多样化的研究选区受益。在过去的支持期间，UTCT为190多名主要研究人员提供了服务，其中大多数是地球科学家，涵盖了子学科的全部广度，包括岩石学，古生物学，结构地质学，水文学，流星，经济和石油地质学。 UTCT的客户还包括许多其他领域的研究人员，主要是生物学，工程和人类学。调查人员的四分之三来自得克萨斯大学以外。该设施将继续通过开发的短期课程来支持用户培训，并协助用户减少数据。 这种支持与NSFS的使命一致，NSFS的使命促进了科学的进步，并通过在地下中促进对水和碳氢化合物的行为的了解，以及培训科学领域的尖端分析方法的知识。*** ***。