Heitt Mjölnir: a heated miniature triaxial apparatus for 4D synchrotron microtomography.
Heitt Mjölnir: a heated miniature triaxial apparatus for 4D synchrotron microtomography.
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DOI：
10.1107/s1600577523009876
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发表时间：
2024-01-01
影响因子：
2.5
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中科院分区：
文献类型：
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本文介绍了一种用于同步辐射显微断层成像的小型加热式三轴装置Heitt Mjolnir。这一新设备结合了变形装置和具有大量样品的热反应器的能力，适用于广泛的地球能源应用。具有高通量和光束能量的第三代和第四代同步加速器光源可以使用创新的X射线半透明实验设备。这些实验设备可以访问地质相关条件，同时使用成像光束线处可访问的空间和时间分辨率进行原位表征。在这里，Heitt Mjölnir被介绍，这是一个基于Mjölnir设计的加热式微型三轴试验台，但在类似的压力能力下覆盖了更宽的温度范围和更大的样品体积。该装置旨在使用10 mm × 20 mm（直径×长度）的圆柱形样品研究从颗粒到厘米尺度的热、化学、水力和机械耦合过程。 Heitt Mjölnir可以同时达到30 MPa和500 MPa轴向应力的围压（液压），独立控制样品孔隙流体压力< 30 MPa。 这种内部加热的设备可在高达573 K的温度下工作，样品中的最小垂直热梯度<0.3 K mm−1。 这种新设备已被部署在TOMCAT（瑞士光源），I12 JEEP（金刚石光源）和PSICHLEP（同步加速器SOLEIL）光束线的操作研究中，用于4D X射线显微断层扫描，扫描间隔为几分钟。Heitt Mjölnir是便携式和模块化的，允许对低级变质和变形过程进行广泛的4D表征。它可以在地壳储层条件下进行空间和时间分辨的流体-岩石相互作用研究，适用于地热、碳酸化或地下储气应用中的材料特性表征。本出版物中包含技术图纸和操作指南。
Heitt Mjolnir, a heated miniature triaxial apparatus for 4D synchrotron microtomography, is described. This new device combines the capacities of a deformation rig and a thermal reactor with large sample volumes and is suitable for a large range of geo-energy applications. Third- and fourth-generation synchrotron light sources with high fluxes and beam energies enable the use of innovative X-ray translucent experimental apparatus. These experimental devices access geologically relevant conditions whilst enabling in situ characterization using the spatial and temporal resolutions accessible at imaging beamlines. Here, Heitt Mjölnir is introduced, a heated miniature triaxial rig based on the design of Mjölnir, but covering a wider temperature range and larger sample volume at similar pressure capacities. This device is designed to investigate coupled thermal, chemical, hydraulic and mechanical processes from grain to centimetre scales using cylindrical samples of 10 mm × 20 mm (diameter × length). Heitt Mjölnir can simultaneously reach confining (hydraulic) pressures of 30 MPa and 500 MPa of axial stress with independently controlled sample pore fluid pressure < 30 MPa. This internally heated apparatus operates to temperatures up to 573 K with a minimal vertical thermal gradient in the sample of <0.3 K mm−1. This new apparatus has been deployed in operando studies at the TOMCAT (Swiss Light Source), I12 JEEP (Diamond Light Source) and PSICHÉ (Synchrotron SOLEIL) beamlines for 4D X-ray microtomography with scan intervals of a few minutes. Heitt Mjölnir is portable and modular, allowing a wide range of 4D characterizations of low-grade metamorphism and deformational processes. It enables spatially and temporally resolved fluid–rock interaction studies at conditions of crustal reservoirs and is suitable for characterization of material properties in geothermal, carbonation or subsurface gas storage applications. Technical drawings and an operation guide are included in this publication.