ABSTRACT A new opposed type double-stage large volume cell has been developed to compress large volume samples to more than 100 GPa (Mbar) pressure. A pair of second-stage diamond anvils is introduced into the first-stage Paris–Edinburgh press. The double-stage large volume cell allows the generation of ultrahigh pressures using a large culet diameter of the second-stage diamond anvils (diameters of 0.5–1.2 mm). Pressure generation up to 131 GPa has been achieved by using the culet diameter of 0.5 mm. Sample volume of the double-stage large volume cell can be more than ∼100 times larger than that of conventional Mbar experiment using a diamond anvil cell. The double-stage large volume cell has a large opening in the horizontal plane for X-ray measurements, which is particularly suited for the multi-angle energy dispersive X-ray diffraction measurement, thus opening a new way of in situ structural determinations of amorphous materials at Mbar pressures.

中文翻译：

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大样品量Mbar压力实验对置式双级池

摘要 已开发出一种新型对置式双级大体积样品池，可将大体积样品压缩至超过 100 GPa (Mbar) 的压力。一对第二阶段的金刚石砧被引入第一阶段的巴黎-爱丁堡压机中。双级大体积单元允许使用第二级金刚石砧座的大底尖直径（直径为 0.5-1.2 毫米）产生超高压。通过使用 0.5 毫米的底尖直径，已经实现了高达 131 GPa 的压力产生。双级大容量池的样品体积可以比使用金刚石砧池的常规 Mbar 实验大 100 倍以上。双级大容量池在水平面有一个大开口，用于 X 射线测量，