Experimental and Theoretical Investigations of Coherent Anti -Stokes Raman Scattering as a Nonintrusive Diagnostic for Gas -Phase Systems

The second portion of the work concerned the development of a theoretical model for electronic-resonance-enhanced CARS (ERE CARS) spectra of nitric oxide. This model incorporates the effects of the Raman resonance in conjunction with an electronic resonance to provide the first known theoretical predictions for NO. To determine the model's accuracy and effectiveness, predictions were compared to previously obtained experimental data. The comparisons displayed close agreement between spectral peak locations and relative intensities. Experimental linewidths were larger than predicted by the theory, which is attributed to saturation or Stark effects in the experiment. The model also allowed for the correct assignment of the molecular constants for the split ground states. This model can be used for investigations of NO formation in hypersonic flow and combustion and can be extended to other species for rapid detection of air pollutants and toxins.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Mechanical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Kuehner, Joel Paul

Contributors dc:contributor

• Dutton, J. Craig
• Lucht, Robert P.

• Chemistry, Physical

Language dc:language

eng

Identifier

(MiAaPQ)AAI3086106

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/83791