MRI: Development of ps-REMPI, a Facility for Trace Species Analysis

在主要研究仪器（MRI）计划的支持下，SRI国际分子物理实验室的Harald Oser和David L. Huestis将开发一种用于痕量物质分析的皮秒共振增强多光子电离（REMPI）仪器。新仪器将由激光电离质谱仪组成，使用可调、可变脉冲长度、皮秒激光系统。目标分析物包括硝基化合物；含卤素、金属和重原子的有机分子；芳香酮;大的生物分子;还有化学战剂。由于它们的激发态很短，这些分子不能用传统的纳秒脉冲持续激光电离源检测到。该仪器将为培训研究人员使用激光电离质谱和激光电离光谱提供一个例外的机会。能够探测短寿命化学战剂和爆炸物的仪器的可用性也将对国土安全产生重大影响。

With support from the Major Research Instrumentation (MRI) Program, Harald Oser and David L. Huestis in the Molecular Physics Laboratory at SRI International will develop a Picosecond Resonance Enhanced Multiphoton Ionization (REMPI) instrument for Trace Species Analysis. The new instrument will consist of a laser ionization mass spectrometer using a tunable, variable pulse length, picosecond laser system. The targeted analytes include nitrocompounds; organic molecules containing halogen, metal, and heavy atoms; aromatic ketones; larger biomolecules; and chemical warfare agents. Because of their short-lived excited states, these molecules cannot be detected using conventional nanosecond pulse-duration laser ionization sources. This instrument will provide an exception opportunity for training researchers in the use of laser ionization mass spectrometry and laser ionization spectroscopy. The availability of an instrument capable of detecting short-lived chemical warfare agents and explosives will also have a large impact on homeland security.