Industry/University Cooperative Research Center for Ultra-High Speed Integrated Circuits and Systems (ICAS)

超高速集成电路与系统产学合作研究中心（ICAS）

• 批准号: 8816669
• 负责人: Thomas Ahrens
• 金额: $ 36.41万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-06-01 至 1992-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8816669&HistoricalAwards=false
• 关键词: Industry; University; Cooperative; Research; Center

Constraints on the composition of the earth's core can be obtained by comparing shock wave equation of state and compressional velocity at high pressure data to seismic data over the pressure and temperature range present in the earth's outer core. Knowledge of the composition of the core is inextricably interwoven with theories of the differentiation and thermal evolution of the earth. Recent results from this project constrain the temperature of a core in terms of the melting point of Fe and FeS. This award provides support for continuation of a program of exploration and measurements of the equation of state, pressure-volume-temperature relations of candidate core materials- Fe, FeS, and FeO. In addition to the equation of state longitudinal and bulk sound speed at high pressure and high temperatures using velocity interferometry and a new preheating technology will be measured. The regime of shock measurements of preheated samples is 1000 - 2500 K both in core materials and some minerals of mantle.

通过将高压数据下的冲击波状态方程和压缩速度与地球外核存在的压力和温度范围内的地震数据进行比较，可以获得对地核组成的约束。有关地核组成的知识与地球的分异和热演化理论密不可分。该项目的最新结果根据Fe和FeS的熔点限制了核心的温度。该奖项为继续探索和测量候选核心材料--Fe、FeS和FeO的状态方程、压力-体积-温度关系提供支持。除了状态方程外，还将使用速度干涉法和一种新的预热技术来测量高压和高温下的纵向和整体声速。预热样品的冲击波测量范围为1000-2500K，无论是在岩心物质中还是在地幔的某些矿物中。