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

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项目编号	1561622
	Facility Support: High-Resolution X-ray Computed Tomography Laboratory
	Richard Ketcham
主持机构	University of Texas at Austin
项目开始年	2016
	2016-05-01
项目结束日期	2018-04-30
资助机构	US-NSF
项目类别	Continuing grant
项目经费	522308(USD)
国家	美国
语种	英语
英文摘要	1561622 Ketcham This 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. ***
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文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/69473
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Richard Ketcham.Facility Support: High-Resolution X-ray Computed Tomography Laboratory.2016.