Instrumentation Development Proposal: Design & Construction of a Modular Instrument to Study the Photofragmentation Channels of Polyatomic Radicals

在化学研究仪器和设施(CRIF)计划的支持下，芝加哥大学的劳里·巴特勒教授将设计和建造一个模块化仪器来研究多原子自由基光碎裂通道。该仪器将包括以下能力：a)在掠过的、差动泵浦的脉冲分子束膨胀源中光解产生自由基；b)高分辨率速度图成像检测，带有实时离子计数，通过共振增强多光子电离检测反应产物的速度、内态分布和角分布；c)氢原子高n里德堡飞行时间检测；以及d)分散的紫外光发射检测。气相自由基化学在燃烧和大气过程等不同领域中具有重要意义。

With support from the Chemistry Research Instrumentation and Facilities (CRIF) Program, Prof. Laurie Butler of the University of Chicago will design and construct a modular instrument to study the photofragmentation channels of polyatomic radicals. The instrument will incorporate the following capabilities: a) photolytic generation of radicals in a skimmed, differentially-pumped pulsed molecular beam expansion source; b) high-resolution velocity map imaging detection, with real-time ion-counting, of the velocities, internal state distributions, and angular distributions of reaction products detected via resonance enhanced multiphoton ionization; c) hydrogen atom high-n Rydberg time-of-flight detection; and d) dispersed UV photon emission detection. Gas phase radical chemistry is of central importance in diverse areas such as combustion and atmospheric processes.