Acquisition of an Electron Probe Microanalyzer

0744154 Ague这笔赠款将支持耶鲁大学购买一台新的电子探针显微分析仪（EPMA）。目前的JEOL JXA-8600 EPMA在过去的17年里在研究和本科生和研究生教学中发挥了至关重要的作用，但机械和计算机部件的自然老化，许多计算机软件和硬件的过时，以及当前和未来研究计划的不断扩大的需求，需要更换现有的仪器。新的研究将严重依赖于成像和化学映射功能比我们目前可以解决的小一到两个数量级，使用波长色散和能量色散光谱仪的二维化学映射，以及新的波长色散光谱仪（WDS）设计，这将提高计数率和峰背景比。支持新仪器的研究基地包括广泛的现场，实验室，实验和理论项目。新的电子探针将与新购买的扫描电镜一起，构成地质和地球物理系连贯的“微束中心”的基础。 该中心将为耶鲁大学下一代的研究和教学以及新英格兰南部更广泛的教育、科学和工业社区提供必要的分析能力。

0744154AgueThis grant will support the purchase of a new electron probe microanalyzer (EPMA) at Yale University. The current JEOL JXA-8600 EPMA has played a vital role in research and undergraduate and graduate level teaching over the last ~17 years, but the natural aging of mechanical and computer components, the obsolescence of much of the computer software and hardware, and the expanding needs of current and future research programs require replacement of the existing instrument. New research will be critically dependent on imaging and chemically mapping features one to two orders of magnitude smaller than we can currently resolve, on two-dimensional chemical mapping using wavelength-dispersive and energy-dispersive spectrometers, and on newly available wavelength-dispersive spectrometer (WDS) designs that will improve count rates and peak-to-background ratios. The research base that will support a new instrument comprises a broad spectrum of field, laboratory, experimental, and theoretical projects. The new EPMA will, together with a newly-purchased SEM, form the basis of a coherent "Microbeam Center" in the Department of Geology and Geophysics. This center will provide the analytical capabilities necessary for the next generation of research and teaching at Yale as well as for the broader educational, scientific, and industrial communities of southern New England.