Neutron scattering and neutron imaging have emerged as powerful methods for experimentally investigating material deformation and fluid flow in the interior of otherwise inaccessible or opaque structures. This paper describes the design and provides example uses of a pressure cell developed for investigating such behaviors within geological materials. The cell can accommodate cylindrical samples with diameters up to 38.1 mm and lengths up to 154 mm. Ports in the cell and a pressure isolating sleeve around the sample allow the independent application of confining pressure up to 69 MPa and axial pressure up to 34.5 MPa. Two material versions of the cell have been manufactured and used to date. An aluminum version is typically used for temperatures below 40 °C, because of its relative transparency to neutrons, while a titanium version, which is comparatively more neutron attenuating, is used for experiments requiring triaxial pressurization under conditions up to 350 °C. The pressure cells were commissioned at the VULCAN engineering diffractometer at the Oak Ridge National Laboratory (ORNL), Spallation Neutron Source, and have since been used at the ORNL high flux isotope reactor CG1-D imaging beamline, National Institute of Standard and Technology (NIST) BT-2, and NIST NG6 imaging beamlines.

中文翻译：

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用于中子成像和基于中子衍射的地质材料应变测量的高压流过测试容器

中子散射和中子成像已经成为实验研究材料变形和流体在其他难以接近或不透明的结构内部流动的有力方法。本文描述了设计并提供了为研究地质材料中的此类行为而开发的压力传感器的示例使用。样品池可容纳直径达 38.1 毫米、长度达 154 毫米的圆柱形样品。单元中的端口和样品周围的压力隔离套允许独立施加高达 69 MPa 的围压和高达 34.5 MPa 的轴向压力。迄今为止，已经制造并使用了两种材料版本的电池。铝型通常用于低于 40 °C 的温度，因为它对中子具有相对透明性，而钛型则用于 中子衰减相对较大，用于需要在高达 350 °C 的条件下进行三轴加压的实验。压力传感器在橡树岭国家实验室 (ORNL) 散裂中子源的 VULCAN 工程衍射仪上进行调试，此后一直用于 ORNL 高通量同位素反应器 CG1-D 成像光束线，美国国家标准与技术研究院 (NIST) ) BT-2 和 NIST NG6 成像光束线。