MRI: Development of a Chirped-Pulse, Fourier-Transform mm-Wave Pulsed Uniform Supersonic Flow Spectrometer

获得该奖项后，韦恩州立大学的Arthur Suits教授和麻省理工学院的同事Robert field将开发出一种光谱仪，该光谱仪将结合两项强大的技术：超宽带啁啾脉冲、傅里叶变换微波光谱分析和从拉瓦尔(会聚-发散)喷嘴获得的脉冲均匀超音速流动。这种组合有可能为在30-50K加热的近新生物种提供一种几乎通用的检测方法，可以定量测量反应中间体、激发态和振动分布。该建议旨在加强各级的研究培训和教育，特别是在以下领域：(A)异构体和构象的检测，(B)不稳定反应中间体、产物振动分布和分子激发态的定量检测和光谱表征，以及(C)反应动力学、动力学、燃烧和大气化学、物理和天体化学。这种组合产生了一些新的东西：一种仪器，可以检测不稳定反应产物或分子激发态的绝对数量，同时确定它们的结构：结合光谱学(提供结构信息)和动力学(揭示反应事件的细节)。这些独特的属性表明，新的文书将在许多领域具有广泛的适用性。在仪器的开发、建造、测试和调试过程中，许多学生将参与其中。

With this award from the Major Research Instrumentation (MRI) program Professor Arthur Suits from Wayne State University and colleague Robert Field from the Massachussetts Institute of Technology will develop a spectrometer that will join two powerful technologies: ultrabroad band chirped-pulse, Fourier-transform microwave spectroscopy and pulsed uniform supersonic flows obtained from a Laval (convergent-divergent) nozzle. This combination has the potential to offer a nearly universal detection method for near-nascent species thermalized at 30-50 K, that can deliver quantitative measurements of reaction intermediates, excited states, and vibrational distributions. The proposal is aimed at enhancing research training and education at all levels, especially in areas such as (a) detection of isomer and conformers, (b) quantitative detection and spectroscopic charaterization of unstable reaction intermediates, product vibration distributions, and molecular excited states, as well as (c) reaction dynamic, kinetics, combustion and atmospheric chemistry, physics and astrochemistry.This unique spectrometer combines two powerful new techniques using sophisticated electronics developed for the communications industry. The combination results in something new: an instrument that can detect absolute numbers of trace amounts of unstable reaction products or excited states of molecules, and at the same time determine their structure: combining spectroscopy (giving structural information) and dynamics (revealing details of the reactive events). These unique attributes indicate that the new instrument will have broad applicability across many fields. During development, construction, testing and commissioning of the instrument many students will participate.