Acquisiiton of a Variable-Vacuum Scanning Electron Microscope and Energy Dispersive X-Ray Spectrometer

获取可变真空扫描电子显微镜和能量色散 X 射线光谱仪

• 批准号: 9871165
• 负责人: Mark Gabel
• 金额: $ 11.48万
• 依托单位: Black Hills State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-01 至 2000-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9871165&HistoricalAwards=false
• 关键词: Acquisiiton; Variable; Vacuum; Scanning; Electron

With National Science Foundation support, Dr. Mark Gabel and Black Hills State College will purchase a JEOL variable-vacuum scanning electron microscope and energy dispersive X-Ray Spectometer. The system can operate at both low vacuum and high vacuum pressures, providing high resolution @ 3.5 nm. at 30kV for high vacuum and @ 5.5mn at 30kV in low vacuum mode. The options permit high resolution images over a wide range of magnifications and voltages which allows examination of specimens which may be difficult to observe under normal operating conditions due to problems with low conductivity or water content or with borrowed specimens which can not be coated. Black Hills State College currently employs a 17 year old microscope which is rapidly nearing the end of its useful life. Investigators at the College will pursue a wide range of research and the microscope X-Ray Spectometer system will be used in a variety of projects. These include: examination of Miocene plant fossils from North and South America; evaluation of the mechanical behavior of fiber reinforced cement and alkali-carbonate and alkali-silica reactivity in concrete pavements; comparison of tooth morphologies from Late Cretaceous Theropods; examination of seasonal diets of livestock, wildlife and insects in prairie ecosystems and woodlands; study of infections of the fungus Saprolegnia on Chinook Salmon; identification of use wear on lithic and bone tools from archaeological sites; the development of taste bud morphology and gustatory pathways in the brains of fishes; and the examination of Ascospores of Phyllachora. Undergraduates will be involved with many of these projects and thus the instrumentation will serve an important educational function.

在国家科学基金会的支持下，Mark Gabel 博士和 Black Hills 州立学院将购买一台 JEOL 可变真空扫描电子显微镜和能量色散 X 射线光谱仪。该系统可以在低真空和高真空压力下运行，提供 3.5 nm 的高分辨率。在高真空模式下为 30kV，在低真空模式下为 30kV @ 5.5mn。这些选项允许在各种放大倍率和电压下获得高分辨率图像，从而可以检查在正常操作条件下由于电导率低或含水量问题或无法涂层的借用样本而难以观察的样本。 Black Hills 州立学院目前使用的显微镜​​已有 17 年历史，其使用寿命很快即将结束。 学院的研究人员将进行广泛的研究，显微镜 X 射线光谱仪系统将用于各种项目。其中包括：对北美和南美中新世植物化石的检查；评估混凝土路面中纤维增强水泥的机械​​性能以及碱碳酸盐和碱硅反应性；白垩纪晚期兽脚亚目动物牙齿形态的比较；检查草原生态系统和林地中牲畜、野生动物和昆虫的季节性饮食；奇努克鲑鱼水霉属真菌感染的研究；鉴定考古遗址石器和骨器的使用磨损情况；鱼类大脑中味蕾形态和味觉通路的发育；以及Phyllachora子囊孢子的检查。本科生将参与其中许多项目，因此仪器将发挥重要的教育功能。