Mineral Elasticity by Brillouin Scattering at One Atm. and High Pressures

PI将开展一项研究计划，通过在金刚石砧细胞中压缩到高压的样品上进行布里渊光散射实验，测量声速，从而测量矿物和高压硅酸盐相的弹性特性。这些实验将产生弹性性质的压力导数，并将使矿物组合的性质在地球内部的实际条件下得到更有信心的计算。虽然最初的实验将在被认为主导上地幔的相上进行，但这项技术可以也将应用于金属和非晶态材料。这项研究将需要集中精力改进高压布里渊散射的实验技术，以便能够快速准确地测量压力导数。

The PI will carry out a research program of measuring sound velocities and, hence, elastic properties of minerals and high- pressure silicate phases by Brillouin light scattering experiments on samples compressed to high pressures in diamond anvil cells. These experiments will yield the pressure derivatives of elastic properties, and will allow the properties of mineral assemblages to be calculated for actual conditions within the Earth with much greater confidence. Although initial experiments will be made on phases that ate thought to dominate the upper mantle, this technique can and will be applied to metallic and amorphous materials as well. This research will require a concentrated effort to refine the experimental techniques involved with high pressure Brillouin scattering, so that rapid and accurate measurements of pressure derivatives can be made.