Application of neutron computed tomography in the geosciences
Application of neutron computed tomography in the geosciences
复制标题
中子计算机断层扫描在地球科学中的应用
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
C. Lesher
中科院分区：
文献类型：
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作者：
M. Wilding;K. Shields;C. Lesher
加州大学戴维斯分校 (UCD-MNRC) 拥有和运营的麦克莱伦核辐射中心 (UCD-MNRC) 开发了一项将中子计算机断层扫描 (CT) 应用于地质问题的研究项目。中子的高穿透性、对轻元素的敏感性以及对氢（在水或有机材料中）的特殊敏感性使它们成为对具有地质意义的复杂材料进行无损检查的理想工具。 UCD-MNRC 有四个与地质材料表征相关的研究重点：（1）变形结晶岩石纹理的量化； (2)多孔岩石和沉积物中多相流的特性； (3)硅酸盐和碳酸盐岩中有机碳和无机碳的分布； (4)通过流体-岩石反应封存二氧化碳。将介绍这些研究活动的例子。 UCD-MNRC 正在安装新的 CT 基础设施，以满足这四个研究项目的需求。其中的升级包括开发“微型”CT 设施和标准化 CT 采集，与 X 射线 CT 兼容。后者将允许在 X 射线和中子射线照片投影以及随后的 CT 重建之间进行直接索引。
A research program that applies neutron computed tomography (CT) to geological problems has been developed at the McClellan Nuclear Radiation Center (UCD-MNRC) owned and operated by the University of California, Davis (UCD-MNRC). The high penetration of neutrons, their sensitivity to light elements, and their special sensitivity to hydrogen (in water or organic materials) make them an ideal tool for non-destructive examination of complex materials of geological interest. There are four research foci at UCD-MNRC related to geological material characterization: (1) quantification of textures of deformed crystalline rocks; (2) properties of multi-phase flow in porous rocks and sediments; (3) distribution of organic and inorganic carbon in silicate and carbonate rocks; and (4) CO2 sequestration through fluid-rock reaction. Examples of these research activities will be presented. A new CT infrastructure is being installed at the UCD-MNRC to meet the needs of these four research programs. Among the upgrades are the development of a ‘‘micro’’ CT facility and standardized CT acquisition, compatible with X-ray CT. The latter will allow direct indexingbetween X-ray and neutron radiograph projections and subsequent CT reconstructions.