Voltolini Marco, Barnard Harold, Creux Patrice, Ajo-Franklin Jonathan
Earth and Environmental Sciences Area, Energy Geoscience Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA.
Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA.
J Synchrotron Radiat. 2019 Jan 1;26(Pt 1):238-243. doi: 10.1107/S1600577518015606.
A new experimental triaxial cell for in situ synchrotron X-ray micro-computed tomography aimed at imaging small samples of (6 mm × 19 mm) at high temperatures (up to 400°C) and pressures (up to 24 MPa confining) is presented. The system has flow-through capabilities, independent axial and radial pressure control, and has been developed and tested at the 8.3.2. beamline at the Advanced Light Source. The characteristics of this new experimental rig are described, along with the challenges, mainly concerning the combination of X-ray transparency with vessel strength at high temperature, and solutions found during the development stage. An experiment involving oil shale pyrolysis under subsurface conditions, highlighting the importance of a device able to operate in this pressure and temperature range, is also introduced. The availability of this cell enables an unprecedented range of experiments in the Earth Sciences, with a special focus on subsurface geothermal processes.
本文介绍了一种新型实验三轴单元，用于原位同步加速器X射线显微计算机断层扫描，旨在对尺寸为(6 mm×19 mm)的小样本在高温(高达400°C)和高压(围压高达24 MPa)下进行成像。该系统具有流通能力、独立的轴向和径向压力控制，并且已经在先进光源的8.3.2.束线处进行了开发和测试。描述了这种新型实验装置的特点，以及所面临的挑战，主要涉及高温下X射线透明度与容器强度的结合问题，以及在开发阶段找到的解决方案。还介绍了一个涉及油页岩在地下条件下热解的实验，突出了能够在该压力和温度范围内运行的装置的重要性。这种单元的可用性使得地球科学领域能够开展前所未有的一系列实验，特别关注地下地热过程。
