Structural investigation of iron, periclase and carbon at megabar pressures from static compression experiments using double-stage diamond anvil cell

该提案的目的是通过静态压缩和X射线探测器在前所未有的压力和温度下研究岩石行星和系外行星（Fe，MgO，C）内部发现的材料结构。通过选择Fe，MgO和C，我们专注于现代高压物理学中最困难和最有争议的主题之一，并且可能解决一些行星科学问题。在该项目中，我们将使用最先进的技术，在欧洲X射线自由电子激光器（XFEL）的双级金刚石对顶砧室（dsDAC）中，在可变温度下产生500 GPa以上的压力。这个实验装置在访问最遥远的行星内部的P-T条件方面是独一无二的，并将为测试我们在极端条件下管理物质状态的物理知识开辟一个新的平台。我们建议使用这种新开发的技术在与行星最相关但简单的材料上进行开创性实验，这将有助于为这一方向的进一步努力提供基准。

The aim of this proposal is to investigate structure of materials found in the interiors of rocky planets and exoplanets (Fe, MgO, C) by means of static compression and x-ray probes at unprecedented pressures and temperatures. By choosing Fe, MgO, and C we are focusing on one of the most difficult and controversial subjects of modern high-pressure physics and, beneficially, may resolve some of the planetary science problems. Within this project we will use the state-of-the-art techniques for generating pressures above 500 GPa at variable temperatures in double-stage Diamond anvil cell (dsDAC) coupled with High Energy Density (HED) instrument at the European X-ray Free Electron Laser (XFEL). This experimental setup is unique in accessing P-T conditions of the most remote planetary interiors and will open a new platform for testing our knowledge of physics governing the states of matter at extreme conditions. We propose to carry out pioneering experiments using this newly developed technique on the most planetary-relevant, but simple materials that will help to benchmark further efforts in this direction.