Shen Guoyin, Ferry Richard, Kenney-Benson Curtis, Rod Eric
HPCAT, X-ray Science Division, Argonne National Laboratory, Lemont, Illinois 60439, USA.
Rev Sci Instrum. 2024 Jul 1;95(7). doi: 10.1063/5.0212181.
The diamond anvil cell (DAC) has been widely used in high-pressure research. Despite significant progress over the past five decades, the opposed anvil geometry in the DAC inevitably leads to a disk-shaped sample configuration at high pressure. This intrinsic limitation is largely responsible for the large pressure and temperature gradients in the DAC, which often compromise precise experiments and their characterizations. We designed and fabricated a multi-axis diamond anvil cell (MDAC) by adopting the concept of a multi-anvil apparatus but using single crystal diamonds as the anvil material. Preliminary data show that the MDAC can generate extreme pressure conditions above 100 GPa. The advantages of the MDAC over a traditional opposed anvil DAC include thicker, voluminous samples, quasi-hydrostatic, or designed deviatoric stress conditions, and multidirectional access windows for optical applications and x-ray probes. In this article, we present the design and performance of a prototype MDAC, as well as the application prospects in high-pressure research.
金刚石对顶砧（DAC）已广泛应用于高压研究。尽管在过去五十年中取得了重大进展，但DAC中相对的砧座几何结构在高压下不可避免地导致样品呈盘状结构。这种内在限制在很大程度上导致了DAC中存在较大的压力和温度梯度，这常常会影响精确实验及其表征。我们通过采用多砧装置的概念，但使用单晶金刚石作为砧座材料，设计并制造了一种多轴金刚石对顶砧（MDAC）。初步数据表明，MDAC能够产生超过100 GPa的极端压力条件。与传统的对顶砧DAC相比，MDAC的优势包括更厚、体积更大的样品、准静水或设计的偏应力条件，以及用于光学应用和X射线探针的多向访问窗口。在本文中，我们介绍了MDAC原型的设计和性能，以及在高压研究中的应用前景。
