Upgrade of Shock Wave Laboratory for Research in High-Pressure Mineral and Melt Physics

高压矿物和熔体物理研究冲击波实验室升级

• 批准号: 0824983
• 负责人: Paul Asimow
• 金额: $ 11.93万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-12-15 至 2009-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0824983&HistoricalAwards=false
• 关键词: Upgrade; Shock; Wave; Laboratory; Research

0824983AsimowThis grant supports upgrade of the Caltech Shock Wave Lab facilities. In order to advance U.S. capability for high-precision, high shock pressure (up to 500 GPa) dynamic compression experiments on small, porous, and pre-heated targets (silicates, oxides and metals), a new 25 mm x 228? launch tube, flash source for fast streak photography, two oscilloscopes and a vacuum pump will be acquired. The equipment upgrade will permit simultaneous measurements of Equation of State, sound speed and temperature of shocked materials and experiments at pressures equal to that found within Earth and planetary cores. Higher shock pressures will be afforded by the tighter barrel inner diameter of a new launch tube relative to the aging and stress expanded tube now in use at Caltech. Studies of the melting behavior of silicates at lower mantle conditions can be used to constrain models of the thermochemical evolution of a magma ocean, thought to exist on the early Earth. The new capability will also allow the PIs to explore the melting curves of metals at conditions found within the Earth?s Core.

这项拨款支持加州理工学院冲击波实验室设施的升级。为了提高美国在小型，多孔和预热目标（硅酸盐，氧化物和金属）上进行高精度，高冲击压力（高达500 GPa）动态压缩实验的能力，新型25 mm x 228？将获得发射管，用于快速条纹摄影的闪光源，两个示波器和一个真空泵。设备升级将允许同时测量状态方程、声速和受冲击材料的温度，并在与地球和行星核心相同的压力下进行实验。与加州理工学院目前使用的老化和应力膨胀管相比，新型发射管的枪管内径更小，可以提供更高的冲击压力。对下地幔条件下硅酸盐熔融行为的研究可以用来约束岩浆海洋的热化学演化模型，人们认为岩浆海洋存在于早期地球。新的能力还将允许pi探索在地球内部条件下金属的熔化曲线。年代的核心。