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首页> 外文会议>International Symposium of the Society of Core Analysts >SCA2003-51: Development of a Portable X-Ray Computed Tomographic Imaging System for Drill-Site Investigation of Recovered Core
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SCA2003-51: Development of a Portable X-Ray Computed Tomographic Imaging System for Drill-Site Investigation of Recovered Core

机译：SCA2003-51：开发便携式X射线计算机断层摄像系统，用于恢复核心的钻头现场调查

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A portable x-ray computed tomography(CT)system was constructed for imaging core at drill sites.Performing drill-site-based x-ray scanning and CT analysis permits rapid evaluation of core properties(such as density,lithologic structure,and macroporosity distribution)and allows for real-time decision making for additional core-handling procedures.Because of the speed with which scanning is performed,systematic imaging and electronic cataloging of all retrieved core is feasible.Innovations(such as a novel clamshell shielding arrangement integrated with system interlocks)permit safe operation of the x-ray system in a busy core handling area.The minimization of the volume encapsulated with shielding reduces the overall system weight and facilitates instrument portability.The x-ray system as originally fabricated had a 110 kV x-ray source with a fixed 300-micron focal spot size.A 15 cm image intensifier with a cesium iodide phosphor input screen was coupled to a CCD for image capture.The CT system has since been modified with a 130 kV micro-focal x-ray source.With the x-ray system’s variable focal spot size,high-resolution studies(10-micron resolution)can be performed on core plugs and coarser(100-micron resolution)images can be acquired of whole drill cores.The development of an aluminum compensator has significantly improved the dynamic range and accuracy of the system.An x-ray filter has also been incorporated,permitting rapid acquisition of multi-energy scans for more quantitative analysis of sample mineralogy.The x-ray CT system has operated reliably under extreme field conditions,which have varied from shipboard to arctic.
机译：在钻头站点构建便携式X射线计算机断层扫描（CT）系统。基于钻头的X射线扫描和CT分析允许快速评估核心特性（如密度，岩性结构和大孔隙度分布）并且允许进行额外的核心处理程序的实时决策。因为执行了扫描的速度，系统的成像和电子编目的所有检索核心是可行的。（例如与系统集成的新型蛤壳屏蔽装置）互锁）允许X射线系统在繁忙的核心处理区域中的安全操作。封装屏蔽的卷的最小​​化降低了整个系统重量，便于仪器便携性。原本制造的X射线系统具有110 kV X-具有固定的300微米焦点尺寸的射线源。15厘米碘化铯磷光体输入屏幕的图像增强器耦合到用于图像捕获的CCD .CT由于X射线系统的可变焦点尺寸为130 kV微焦X射线源进行了修改。X射线系统的可变焦点尺寸，高分辨率研究（10微米分辨率）可以在芯塞和较粗糙度上进行（100微米分辨率）图像可以获得整个钻孔。铝补偿器的开发显着提高了系统的动态范围和准确性。也已加入X射线过滤器，允许快速获取多能量扫描以进行更多定量样品矿物学分析。X射线CT系统在极端野外条件下可靠地操作，从船上变为北极。

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