The Introduction of Time-of-Flight and Coincidence Techniques into the Undergraduate Physics Laboratory

飞行时间和重合技术引入本科生物理实验室

• 批准号: 9651386
• 负责人: Martin Johnston
• 金额: $ 1.94万
• 依托单位: University of St. Thomas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-06-01 至 1998-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9651386&HistoricalAwards=false
• 关键词: Introduction; Time; Flight; Coincidence; Techniques

This project strengthens the upper-division physics laboratory program by introducing fast-timing techniques and their applications using state-of-the-art equipment. Event timing is central to a wide range of experiments in atomic, optical, nuclear, and surface physics. Because of this, it is important to incorporate these techniques, and the instrumentation they require, into the undergraduate physics curriculum. To accomplish this goal, the department is introducing two new labs: High Resolution, Low Energy Electron Scattering Cross Section Measurements Using Time-of-Flight Techniques and r-r Coincidence Angular Correlation Studies of 22Na. Both of the experiments require complex timing instrumentation that illustrates the basics of fast-timing techniques with standard equipment used in research and industry. Students are exposed to a variety of technologies: high vacuum, NIM modules, multichannel analyzers, pulse height and time-delay discrimination, charged particle optics, and y-ray detection. A modular approach to the instrumentation allows for the performance of a variety of experiments. By simulating research and industrial environments, this approach gives students useful and practical experience to draw on when they begin their careers. Project dissemination efforts include the American Journal of Physics and American Association of Physics Teachers meetings. Details of experimental procedures will be placed on the Department's World Wide Web homepage. To assess long-term impact, graduates will be surveyed annually for 5 years, with an emphasis on usefulness of skills and techniques acquired in upper-division laboratory experiments.

该项目通过引入快速计时技术及其使用最先进设备的应用，加强了高年级物理实验室计划。事件计时是原子、光学、核和表面物理学中广泛实验的核心。正因为如此，重要的是要将这些技术，他们需要的仪器，到本科物理课程。 为了实现这一目标，该部门正在引入两个新的实验室：高分辨率，低能量电子散射截面测量使用飞行时间技术和22 Na的r-r符合角相关研究。这两个实验都需要复杂的计时仪器，用研究和工业中使用的标准设备来说明快速计时技术的基本原理。学生接触到各种技术：高真空，NIM模块，多通道分析仪，脉冲高度和时间延迟歧视，带电粒子光学和γ射线检测。仪器的模块化方法允许进行各种实验。通过模拟研究和工业环境，这种方法为学生提供了有用的和实际的经验，当他们开始他们的职业生涯。 项目传播工作包括美国物理学杂志和美国物理教师协会会议。实验程序的详细情况将登载在裁军部的万维网主页上。为了评估长期影响，毕业生将每年进行为期5年的调查，重点是在上层实验室实验中获得的技能和技术的实用性。