Acquisition of an Impulsive Stimulated Light Scattering (ISLS) system for elasticity and thermal conductivity studies

行星材料的弹性和导热性是决定地震波如何传播以及热量如何在地球内部交换的最基本参数之一。为了研究行星材料在地球深部相关压力-温度条件下的这些性质，将在得克萨斯大学奥斯汀分校地质科学系矿物物理实验室建立一个脉冲受激光散射系统，并将其与高压金刚石对顶砧单元结合起来，用于现场测量压力、温度和成分的变化。这种光谱技术长期以来一直是材料科学和凝聚态物理学中研究弹性和热扩散率的重要工具，通过此次仪器收购，它的潜力将在地球科学研究中得到充分利用。这些研究将通过对极端环境下行星物质的弹性和传输特性的新认识，增进我们对深地地震和地球动力学结构及化学成分的了解。解释地球深处的地震结构需要了解组成材料的弹性特性，而热导率在理解地球深处的动态过程中发挥着至关重要的作用。因此，矿物物理学研究的主要目标是确定行星材料在相关条件下的声速和热导率。因此，本次收购的研究结果将广泛影响地球物理学和地球动力学领域，因为需要弹性和热导率信息的新方面来满意地模拟地球深部的地震，矿物学和地球动力学行为。此外，该系统非常适合研究液体，这对于了解挥发物的性质、二氧化碳封存和与地壳较浅深度有关的其他热液活动非常重要。根据该项目的倡议，学生和博士后研究人员将有独特的研究机会，使用先进的激光光谱技术，以获得所需的实验室结果，破译地球的地震和地球化学观测？的内部。这将有助于教育下一代对地球有全面了解的独立研究人员。s深的内部。在这个奖项的推广活动的重点是暴露K-12年级的深地球研究参与外展夏季计划。该奖项的成果将通过教学、研讨会、会议和同行评审的出版物广泛传播。

Elasticity and thermal conductivity of planetary materials are among the most fundamental parameters that govern how seismic waves travel and how heat is exchanged in the interior of the Earth. In order to investigate these properties of planetary materials at relevant pressure-temperature conditions of the deep Earth, an Impulsive Stimulated Light Scattering system will be established and integrated with high-pressure diamond anvil cells for in situ measurements with variation of pressure, temperature, and composition in the Mineral Physics Laboratory at the Department of Geological Sciences, the University of Texas at Austin. This spectroscopic technique has long been an essential tool for studying elasticity and thermal diffusivity in materials sciences and condensed matter physics, and its potentials will be fully exploited in earth science research through this instrumentation acquisition. These studies will improve our understanding of deep-Earth seismic and geodynamic structures and chemical compositions through new knowledge of elastic and transport properties of planetary materials under extreme environments. Interpretation of deep-Earth seismic structures requires knowledge of the elastic properties of component materials, whereas thermal conductivity plays an essential role in understanding the dynamic processes in the deep Earth. It is therefore a primary goal of the mineral physics research to ascertain the sound velocities and thermal conductivities of planetary materials under relevant conditions. Results from studies under this acquisition will thus broadly impact the fields of geophysics and geodynamics because new aspects of elastic and thermal conductivity information are needed to model satisfactorily the seismic, mineralogical, and geodynamic behavior of the deep Earth. Additionally, the system is well suited to study liquids, which are of great importance to the understanding of the properties of volatiles, CO2 sequestration, and other hydrothermal activities relevant to shallower depth of the crust. Under the initiatives of the project, students and postdoctoral researchers will have unique research opportunities to use the advanced laser spectroscopic technique to obtain laboratory results needed to decipher seismic and geochemical observations of the planet?s interior. This will contribute to the education of the next generation of independent researchers with a thorough knowledge of the Earth?s deep interior. Outreach activities in this award focus on exposing K-12th graders to deep-Earth research by involving in the outreach summer programs. Results from this award will be disseminated broadly through teaching, seminars, conferences, and peer-reviewed publications.