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

PI将执行一项研究计划，通过对在金刚石顶压室中压缩到高压下的样品进行布里渊光散射实验，测量矿物和高压硅酸盐相的声速，从而测量其弹性性质。这些实验将产生弹性性质的压力导数，并将允许根据地球内部的实际条件更可靠地计算矿物组合的性质。虽然最初的实验将在被认为主宰上地幔的相上进行，但这项技术也可以并将应用于金属和非晶态材料。这项研究需要集中精力改进与高压布里渊散射有关的实验技术，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.