Development of a New Undergraduate Laboratory Methodology: Real-Time Fast-Scanning X-ray Diffractometry

开发一种新的本科实验室方法：实时快速扫描 X 射线衍射法

• 批准号: 9552162
• 负责人: L. Scott Chumbley
• 金额: $ 6.97万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-05-01 至 1998-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9552162&HistoricalAwards=false
• 关键词: Development; New; Undergraduate; Laboratory; Methodology

This project involves the development of a never-before-possible, next-generation lab for the teaching of x-ray diffraction (XRD). Although XRD is one of the most heavily used and depended upon of all analytical techniques in materials science and engineering, it has been extremely difficult to teach because of the time needed to run a typical x-ray scan. Hence, most of the class period is consumed by acquiring a scan, while any on-line, real-time analysis of the XRD data is impossible. Through this project, a new XRD system is developed for real-time analysis of crystallographic structures by using an x-ray generator with the high-speed acquisition capabilities of a position sensitive detector. The XRD hardware is linked to analysis software and databases by way of a local area network of PC-based engineering workstations to provide on-line, real-time analysis of XRD data and crystal structures. In this way, the major difficulty in teaching XRD, namely, the time needed to acquire a scan, is substantially diminished. This method revolutionizes the teaching of XRD because extended exposure to advanced studies involving XRD methodologies is available to undergrads for the first time.

该项目涉及开发一个前所未有的下一代实验室，用于x射线衍射（XRD）的教学。虽然XRD是材料科学和工程中使用最广泛的分析技术之一，但由于运行典型的x射线扫描需要时间，因此教授它非常困难。因此，大部分课堂时间都被扫描所消耗，而任何在线、实时的XRD数据分析都是不可能的。通过该项目，开发了一种新的XRD系统，用于实时分析晶体结构，该系统使用具有位置敏感探测器高速采集能力的x射线发生器。XRD硬件通过基于pc的工程工作站局域网与分析软件和数据库相连接，提供在线、实时的XRD数据和晶体结构分析。这样，就大大减少了教授XRD的主要困难，即获取扫描所需的时间。这种方法彻底改变了XRD的教学，因为这是本科生第一次接触到涉及XRD方法的高级研究。