Shock-Wave Measurements on Candidate Core Components and High Pressure-High Temperature Sound Speed Measurements

除了对熔融核心材料的测量外，PI还将测量选定的地幔矿物和类似物的预热样品的纵波和体波速度，包括MgO， MgA12O4， A12O3和CaTiO3（钙钛矿结构）。他将对核心材料进行更多的测量，并通过将记录电子设备升级到最先进的水平，将这些测量的精度提高到目前的2-4%。这种测量是必需的，因为目前对上述地幔矿物的高温、低压参数测量与地震层析成像推断的变化以及速度结构与大地面线低次谐波的相关性存在差异。

In addition to measurements on molten core materials, the PI will measure compressional and bulk wave velocities of preheated samples of selected mantle minerals and analogs, including MgO, MgA12O4, A12O3 and CaTiO3 (in the perovskite structure). He will conduct more measurements on core materials and to increase the present 2-4% accuracy of these types of measurements by upgrading recording electronics to the state-of-the-art. Such measurements are required because at present the high-temperature, low-pressure measurements of parameters, for the above mantle minerals are discrepant with variations inferred from seismic tomography and correlations of the velocity structure with the low order harmonics of the geoid.