Upgrading of Northern Arizona University Electron Microprobe Laboratory

9812392 Hoisch这笔赠款用于支持升级北方亚利桑那大学的电子探针实验室。 该仪器是20世纪70年代的ETEC Autoprobe，将配备现代探测器电子设备和视频光学系统。 目前，该仪器配备了原装ETEC前置放大器、脉冲幅度分析器、探测器高压电源和速率计。 所有人都至少有20岁，在手术过程中变得不稳定。 由于ETEC已停止运营，因此无法提供更新的组件。 旧的部件将被替换为现代的现成部件，电子馈电线将被修改以接受这些新部件。 这些升级将无限期地延长仪器的使用寿命，提高仪器的稳定性，并允许轻松维修。 现有的光学显微镜将补充一个视频系统，包括摄像机，监视器，图像采集板和PC。这一升级将大大提高机器的教学和培训能力，允许多人同时观察分析操作。 图像采集系统将能够生成分析点位置的准确实时记录。 该实验室服务于北方亚利桑那州和内华达州南部地区，由北方亚利桑那大学人类学和地质学系、拉斯维加斯的内华达州大学地质系的教师以及美国地质调查局弗拉格斯塔夫外地办事处和纳瓦霍民族考古部的研究人员使用。 该实验室支持火成岩和变质岩石学，考古学和人类学的各种研究。

9812392HoischThis grant provides support to upgrade the electron microprobe laboratory at Northern Arizona University. The instrument, an ETEC Autoprobe dating from the 1970's, will be outfitted with modern detector electronics and a video optical system. At present, the instrument is equipped with original ETEC preamplifiers, pulse-height analyzers, detector high-voltage power supplies, and rate meters. All are at least 20 years old and have become unstable over the course of operation. Newer components are not available because ETEC is no longer in business. The old components will be replaced with modern off-the-shelf components and the electronic feed-throughs will be modified to accept these new components. These upgrades will indefinitely extend the lifetime of the instrument, increase instrument stability, and allow for easy repair. The existing light optical microscope will be supplemented with a video system consisting of a video camera, monitor, image-capture board, and PC. This upgrade will enhance teaching and training capabilities of the machine appreciably, allowing a number of people to simultaneously observe analytical operations. The image-capture system will allow accurate real-time records of the locations of analyzed points to be generated. The lab serves the northern Arizona and southern Nevada region and is used by faculty from the Departments of Anthropology and Geology at Northern Arizona University, the Department of Geology at the University of Nevada, Las Vegas, and researchers from the U.S. Geological Survey Flagstaff Field Office, and the Navajo Nation Archaeology Department. The lab supports varied research in igneous and metamorphic petrology, archaeology, and anthropology.***