Characterization of Supersonic Radical Source

A versatile source to produce high-intensity, pulsed supersonic radical beams for crossed-beam experiments: The cyanogen radical CN„X2S1... as a case study

In our laboratory a novel and convenient technique has been developed to generate an intense pulsed cyano radical beam to be employed in crossed molecular beam experiments investigating the chemical dynamics of bimolecular reactions. CN radicals in their ground electronic state S are produced in situ via laser ablation of a graphite rod at 266 nm and 30 mJ output power and subsequent reaction o...

A pulsed, low-temperature beam of supersonically cooled free radical OH molecules

An improved system for creating a pulsed, low-temperature molecular beam of hydroxyl radical (OH) radicals has been developed. We use a pulsed discharge to create OH from H2O seeded in Xe during a supersonic expansion, where the high-voltage pulse duration is significantly shorter than the width of the gas pulse. The pulsed discharge allows for control of the mean speed of the molecular packet ...

Characterization of a pulsed supersonic expansion of a laser produced plasma in a Smalley type source using TOF methods

Simulation of MHD Turbulence-Chemistry Interaction in Supersonic Flow

In order to improve the operational efficiency of scramjet engines, it is necessary to develop new techniques to increase the mixing and flameholding properties at high Mach numbers of current scramjet designs. This paper investigates the high-temperature chemistry and plasmadynamic effects of a discharge arc in a supersonic shear layer. This is the first step in developing a clear understandin...

Spectroscopic Characterization of HOONO and its Binding Energy via Infrared Action Spectroscopy

via Infrared Action Spectroscopy Ilana B. Pollack, Ian M. Konen, Eunice X.J. Li, and Marsha I. Lester Department of Chemistry, University of Pennsylvania Philadelphia, PA 19104-6323 Abstract The trans-perp (tp) conformer of peroxynitrous acid (HOONO), a secondary product of the OH + NO2 reaction and a less stable isomer of nitric acid, has been identified by infrared action spectroscopy in the ...