Acquisition of an Electron Microprobe for Geological and Materials Research at Caltech

加州理工学院购买用于地质和材料研究的电子显微探针

• 批准号: 0318518
• 负责人: George Rossman
• 金额: --
• 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: 2004
• 资助国家: 美国
• 起止时间: 2004-02-15 至 2009-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0318518&HistoricalAwards=false
• 关键词: Acquisition; Electron; Microprobe; Geological; Materials

0318518RossmanThis grant provides partial support for the acquisition of a new electron microprobe (EMP) at Caltech's Division of Geological and Planetary Sciences. The EMP will be equipped with five wavelength dispersive spectrometers with specialized spectrometer crystals for light element analytical capabilities, oil-free pumping system, energy dispersive spectrometer, cathodoluminescence spectrometer, high precision specimen stage, and digital imaging capabilities. A high vacuum carbon coater for sample preparation will also be acquired. The new EMP will replace an aging (15 yrs old) JEOL 733 Superprobe and will be immediately employed for ongoing research requiring high precision, microscale, elemental analysis of solid materials. Examples of research applications that will benefit from the new EMP include: studies of elemental portioning between silicate mineral and coexisting liquids in quenched experimental run products, petrologic characterization of meteorites, identification of chemically unzoned mineral grains for subsequent dating via (U-Th)/He geochronology, studies of hydrous components of mantle mineral phases, and studies of non-equilibrium and metastable synthetic materials. ***

0318518罗斯曼这笔赠款为加州理工学院地质和行星科学部购买新型电子微探针（EMP）提供部分支持。 EMP将配备五台波长色散光谱仪，配有用于轻元素分析能力的专用光谱仪晶体、无油泵系统、能量色散光谱仪、阴极发光光谱仪、高精度样品台和数字成像功能。 还将购买一台用于样品制备的高真空碳镀膜机。 新的 EMP 将取代老化（15 年）的 JEOL 733 Superprobe，并将立即用于需要对固体材料进行高精度、微尺度元素分析的持续研究。 受益于新 EMP 的研究应用示例包括：淬火实验产品中硅酸盐矿物和共存液体之间的元素分配研究、陨石的岩石学特征、化学未分区矿物颗粒的识别，以便通过 (U-Th)/ 进行后续测年他从事地质年代学、地幔矿物相含水成分的研究以及非平衡和亚稳态合成材料的研究。 ***