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

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的电子微探针（EMP）提供部分支持。 EMP将配备五个波长色散光谱仪，具有用于轻元素分析能力的专用光谱仪晶体，无油泵送系统，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能力。 还将获得用于样品制备的高真空碳涂层器。 新的EMP将取代老化（15岁）的JEOL 733超级探针，并将立即用于正在进行的研究，需要高精度，微型，固体材料的元素分析。 将受益于新的EMP的研究应用的例子包括：硅酸盐矿物和共存的液体在淬火实验运行产品，陨石的岩石学特征，化学未分区矿物颗粒的识别，随后通过（U-Th）/He年代学测年，地幔矿物相的含水成分的研究，以及非平衡和亚稳合成材料的研究之间的元素分配的研究。 ***

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. ***