| 项目编号: | 1561622
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| 项目名称: | Facility Support: High-Resolution X-ray Computed Tomography Laboratory |
| 作者: | Richard Ketcham
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| 承担单位: | University of Texas at Austin
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| 批准年: | 2016
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| 开始日期: | 2016-05-01
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| 结束日期: | 2018-04-30
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| 资助金额: | 522308
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| 资助来源: | US-NSF
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| 项目类别: | Continuing grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Earth Sciences
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| 英文关键词: | x-ray
; support
; x-rays
; facility
; utct high energy system
; energy x-ray source
; utct
; x-ray source
; high resolution 3-d image
; sample
; carbon dioxide subsurface sequestration
; resultant x-ray sinogram
; x-ray attenuation
; x-ray tomography
; resolution ccd detector
; x-ray path
; hydrocarbon reservoir extraction enhancement
; texas computed x-ray tomography
|
| 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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| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/92461
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Richard Ketcham. Facility Support: High-Resolution X-ray Computed Tomography Laboratory. 2016-01-01.
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