University of Illinois Urbana-Champaign

Dual Wavelength Cavity Ringdown Spectroscopy For High Precision Methane Isotope Ratio Measurements

Bui, Thinh Quoc

Content Files
TJ10_Abstract.pdf
TJ10_Abstract.txt
TJ10_Presentation.pptx

Permalink

https://hdl.handle.net/2142/51077

Description

Title
Dual Wavelength Cavity Ringdown Spectroscopy For High Precision Methane Isotope Ratio Measurements
Author(s)
Bui, Thinh Quoc
Contributor(s)
  • Okumura, Mitchio
  • Chen, Pin
  • Hogan, Daniel
  • Shen, Linhan
Issue Date
2014-06-17
Keyword(s)
Instrument/Technique Demonstration
Date of Ingest
  • 2014-09-17T16:56:02Z
  • 2015-04-14T18:37:52Z
Abstract
We demonstrate a frequency stabilized cavity ringdown spectrometer capable of measuring simultaneous isotopes of methane (\chem{^{12}CH_4}, \chem{^{13}CH_4}, \chem{^{12}CH_3D}) of enriched samples to high precision ($\delta$D$\textless$0.03$\%$ and $\delta$13C$\textless$0.01$\%$). The spectrometer employs coupling of two orthogonally polarized CW lasers into a ringdown cavity for simultaneous spectral measurements over the full wavelength range of 1.45-1.65$\mu$m. In addition, we discuss the necessity of modeling methane lineshapes with the Galatry profile to achieve the highest precision.
Publisher
International Symposium on Molecular Spectroscopy
Type of Resource
text
Genre of Resource
Conference Paper / Presentation
Language
English
Permalink
http://hdl.handle.net/2142/51077
DOI
https://doi.org/10.15278/isms.2014.TJ10
Copyright and License Information
Copyright 2014 by the authors. Licensed under a Creative Commons Attribution 4.0 International License. http://creativecommons.org/licenses/by/4.0/

Owning Collections

Abstracts & Presentations - 2014 International Symposium on Molecular Spectroscopy PRIMARY