Files in this item

FilesDescriptionFormat

application/vnd.openxmlformats-officedocument.presentationml.presentation

application/vnd.openxmlformats-officedocument.presentationml.presentation1138801.pptx (3MB)
PresentationMicrosoft PowerPoint 2007

application/pdf

application/pdf3103.pdf (19kB)
AbstractPDF

Description

Title:ABSOLUTE NUMBER DENSITY MEASUREMENTS OF HYDROPEROXYL RADICAL IN A NANOSECOND PULSE DISCHARGE USING CAVITY RING-DOWN SPECTROSCOPY
Author(s):Frederickson, Kraig
Contributor(s):Adamovich, Igor V.; Miller, Terry A.
Subject(s):Spectroscopy as an analytical tool
Abstract:A recently implemented cavity ring-down spectrometer has been used to perform absolute number density measurements of hydroperoxyl radical (HO$_{2}$) generated in a repetitive nanosecond-duration, pulse discharge sustained in a mixture of H$_{2}$/O$_{2}$/Ar. The probe source for the spectrometer is a custom-built, injection-seeded, optical parametric oscillator emitting an idler beam in the 1500 nm region accessing the first overtone (2$\nu$$_{1}$) of the O-H stretch. Water vapor was used as a standard species to characterize the spectrometer and provide estimates of the spectral linewidth, sensitivity, and noise level. A specially constructed ring-down cell, with the central portion consisting of rectangular quartz channel tubing and a pair of copper plate electrodes, was used to produce a repetitively pulsed discharge in a H$_{2}$/O$_{2}$/Ar mixture. Narrow bandwidth cavity ring down spectra are acquired of a hydroperoxyl absorption feature composed of numerous closely spaced ro-vibrational lines centered at 6638.20 \wn and number density is determined from the resulting spectral line. This is believed to be the first detection and quantitative measurement of hydroperoxyl radical produced in a nanosecond pulse discharge. The measured number density is compared to the value predicted by the kinetic model of a nanosecond pulse discharge in a reacting H$_{2}$/O$_{2}$/Ar mixture.
Issue Date:06/21/18
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:Conference Paper / Presentation
Type:Text
Language:English
URI:http://hdl.handle.net/2142/100527
DOI:10.15278/isms.2018.RH02
Other Identifier(s):RH02
Date Available in IDEALS:2018-08-17
2018-12-12


This item appears in the following Collection(s)

Item Statistics