Upgrade of Electron Microprobe for Improved Compositional Imaging Capability

9406187特雷西：这项合同提供了升级弗吉尼亚理工学院和州立大学地质科学系所需电子探针仪器所需资金的70%。该机构承诺提供升级所需的剩余资金。此次升级将为该仪器提供新的计算机控制，以及一个无污染的真空抽气系统。VPI的电子探针被广泛用于获得微米级空间分辨率的地质样品中元素分布的图像，这需要现代计算机自动化和在长期暴露于电子束期间不会污染样品表面的泵送系统。***

9406187 Tracy This award provides 70 per-cent of the funding required for the upgrade of the electron microprobe instrument housed and operated in the Department of Geological Sciences at the Virginia Polytechnic Institute and State University. The institution is committed to providing the remaining funds necessary for this upgrade. The upgrade will provide new computer control of the instrument as well as a contamination-free vacuum pumping system. The electron microprobe at VPI is used extensively to obtain images of element distributions in geological samples with micron scale spatial resolution, requiring modern computer automation and a pumping system that will not contaminate the sample surface during long exposure to the electron beam. ***