Simulation, Design and Experiments to Optimize the Diamond Anvil Cell

这项研究涉及一种金刚石砧单元（DAC）的开发，它将能够实现和精确测量高于1 TPa （10 mbar）的静压。（目前已达到的峰值为5.6毫巴，超过了地球中心的峰值）。在这样的静压水平下，材料的性质发生了重大变化（例如，结合和结构以及电子行为）。例如，氧变成金属)。这种新型的高性能DAC （HPDAC）将允许研究以前从未实现过的压力下材料的性能和行为。该项目的主要重点将是开发和实施可用于HPDAC最佳设计的数值模拟和优化工具。边界元和有限元方法的结合将用于创建这个仿真工具。对优化后的HPDAC进行了数值模拟，并与实验结果和基于其他启发式优化设计的模拟结果进行了比较。

This research concerns the development of a diamond anvil cell (DAC) that will enable the attainment and accurate measurement of static pressures above 1 TPa (10 Mbars). (The current peak that has been attained is 5.6 Mbars, exceeding that at the center of the earth). At such levels of static pressure, major changes in the properties of materials take place (e.g., in binding and structure, and in electronic behavior .. e.g., oxygen becomes metallic). This new, high-performance DAC (HPDAC) will allow studies of the properties and behavior of materials in pressure regimes never before achieved. The main focus of the project will be to develop and implement numerical simulation and optimization tools that can be used for the best design of the HPDAC. A combination of boundary element and finite element methods will be used to create this simulation tool. Numerical simulations of the operation of the optimized HPDAC will be compared to experimental results and to simulations based on other designs optimized heuristically.