MRI: Development of a State-of-the-art High-Resolution Tomography Facility Customized for Dynamic (4D) Imaging

这项重大研究仪器(MRI)计划拨款支持一个为期两年的项目，该项目旨在开发定制的高分辨率X射线计算机断层扫描(CT)成像系统，其功能包括螺旋扫描、感兴趣区域成像和时间分辨动态(4D)成像。开发的仪器将首次在学术实验室中提供亚微米分辨率、高保真的地质介质内部的计算机X射线层析成像能力，而不是国家同步加速器光源目前提供的能力，在那里，光束时间极其有限，甚至获得有限(数天)访问的竞争也非常激烈。该项目将涉及与澳大利亚堪培拉澳大利亚国立大学应用数学系的同事合作。X射线CT仪器将作为共用实验室进行管理，并设在俄勒冈州立大学化学、生物和环境工程学院。该仪器将用于研究和研究需要对自然物质内部和流体在多孔介质中的流动进行非破坏性高分辨率(微米到亚微米级)成像的研究，包括基于观察玄武岩熔岩的细微尺度气泡结构来研究火山喷发机制，研究土壤力学以改进防止滑坡、液化和土壤水力坍塌的策略，以及研究流体(包括多相流体)在多孔介质中的基本行为，以支持环境修复工作、二氧化碳的地质封存、地热能提取以及地下水修复和管理。PI计划为俄勒冈州立大学S位于俄勒冈州纽波特的哈特菲尔德海洋科学中心的外展工作开发X射线CT图像可视化模块。对地下流体行为的研究对地下水资源的管理、补救工作和地下油气藏的特征具有重要意义。因此，这笔赠款与NSFs促进国家福利的使命是一致的。

1531316WildenschildThis Major Research Instrumentation (MRI) Program grant supports a two year project to develop a customized high resolution X-ray computed tomography (CT) imaging system with capabilities including helical scanning, region-of-interest imaging, and time resolved dynamic (4D) imaging. The developed instrument would offer the first time in an academic lab, the capability for sub-micron resolution, high fidelity computed X-ray tomographic imaging of the interiors of geologic media, outside of capabilities only now available at National Synchrotron Light Sources where beam time is extremely limited and highly competitive to gain even limited (multi-day) access. The project will involve collaboration with colleagues in the Applied Math Department at Australian National University in Canberra, Australia. The X-ray CT instrument will be managed as a shared-use laboratory, and housed in the School of Chemical, Biological and Environmental Engineering at Oregon State University. The instrument will be employed for research and research training in studies requiring non-destructive high resolution (micron to sub-micron scale) imaging of the interiors of natural materials and the flow of fluids through porous media including studies of eruptive mechanisms of volcanoes based on observation of the fine-scale vesicular structure of basaltic lavas, studies of soil mechanics to improve mitigation strategies against landslides, liquefaction, and hydraulic collapse of soils, and studies of the fundamental behavior of fluid (including multi-phase fluids) flow in porous media to support environmental remediation efforts, geologic sequestration of CO2, geothermal energy extraction, and groundwater remediation and management. The PIs intend to develop X-ray CT image visualization modules for outreach efforts at Oregon State?s Hatfield Marine Science Center in Newport, Oregon. Studies of the behavior of fluids in the subsurface have important implications of the management of groundwater resources, remediation efforts and in characterizing subsurface hydrocarbon reservoirs. As such this grant is congruent with NSFs mission of advancing the national welfare.