Scanning Electron Microscope System

这笔赠款提供12.5万美元，作为密歇根大学地质科学系购置一套新的扫描电子显微镜系统（SEM）费用的一半。具体来说，扫描电镜将包括二次电子探测器，用于检测低原子序数元素的能量色散x射线系统，以及反向散射电子成像和图像数字化和分析的能力。新仪器将取代老旧的（1985年左右）日立S-570扫描电镜，该扫描电镜受到真空泵泄漏的困扰。糟糕的样品阶段设计，只允许模拟捕获电子图像，从而排除了现代扫描电镜中最先进的数字图像分析。新的扫描电镜分析水合样品的能力将允许分析生物材料除了地质样品。该仪器将进行广泛的研究，包括但不限于热液蚀变海洋岩石的微量元素地球化学研究、薄膜研究、变质岩石学、矿床地球化学和牙科材料的表征。它也将有利于大量研究生和本科生的分析需求。＊＊＊

9628196 Peacor This grant provides $125,000 as one-half support of the costs of acquiring a new scanning electron microscope system (SEM) for the Department of Geological Sciences at the University of Michigan. Specifically, the SEM will include detectors for secondary electrons, an energy-dispersive X-ray system for detection of elements with low atomic numbers and the capabilities for back-scattered electron imaging and image digitization and analysis. The new instrument will replace an aging (circa 1985) Hitachi S-570 SEM that is plagued with leaking vacuum pumps. poor sample stage design and only allows analog capture of electron images thus precluding digital image analysis which is the state-of-the-art in modern SEM's. The capabilities of the new SEM to analyze hydrated samples will allow for analyses of biological materials in addition to geological samples. A wide range of research will be conducted with the instrument, including but not limited to, studies of the trace element geochemistry of hydrothermally altered oceanic rocks, thin film research, metamorphic petrology, ore deposit geochemistry and characterization of dental materials. It will also benefit the analytical needs of a large community of graduate and undergraduate students. ***