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

获取脉冲受激光散射 (ISLS) 系统用于弹性和导热性研究

• 批准号: 1053446
• 负责人: Jung-Fu Lin
• 金额: $ 16.8万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-04-15 至 2014-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1053446&HistoricalAwards=false
• 关键词: Acquisition; Impulsive; Stimulated; Light; Scattering

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.

行星材料的弹性和热导率是控制地震波的行进方式以及如何在地球内部交换热量的最基本参数之一。为了研究深层地球相关压力温度条件下行星材料的这些特性，将建立冲动性刺激的光散射系统，并与高压钻石砧细胞进行整合，以与压力，温度和温度和温度和温度变化的原位测量德克萨斯大学奥斯汀分校地质科学系矿物质实验室的组成。长期以来，这种光谱技术一直是研究材料科学和冷凝物理物理学的弹性和热扩散率的重要工具，并且通过此仪器采集，它的潜力将在地球科学研究中充分利用。这些研究将通过对极端环境下行星材料的弹性和运输特性的新知识来提高我们对深地震和地球动力结构以及化学成分的理解。对深地震结构的解释需要了解组件材料的弹性特性，而导热率在理解深层地球的动态过程中起着至关重要的作用。因此，在相关条件下，确定行星材料的声速和热导电性是矿物质物理学研究的主要目标。因此，此次获得的研究的结果将广泛影响地球物理学和地球力学领域，因为需要弹性和热导率信息的新方面，以令人满意地模拟深地球的地震，矿物学和地球动力学行为。此外，该系统非常适合研究液体，这对于理解挥发物，二氧化碳隔离和其他与地壳深度有关的水热活动非常重要。在该项目的举措下，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来获取对地球内部地震的地震和地球化学观察所需的实验室结果。这将有助于对下一代独立研究人员的教育，并以深入的深度内部了解。该奖项中的外展活动的重点是通过参与外展夏季计划来使K-12年级的研究员接触深地球研究。该奖项的结果将通过教学，研讨会，会议和同行评审的出版物进行广泛传播。