Citation Link: https://doi.org/10.3390/opt4040046
Dual-Pump Vibrational Coherent Anti-Stokes Raman Scattering System Developed for Simultaneous Temperature and Relative Nitrogen–Water Vapor Concentration Measurements
Publication Type
Article
Subjects
Raman scattering
Water vapor
Raman spectroscopy
Calibration
Temperature measurement
Analytical Chemistry (journal)
Chemistry
Scattering
Atmospheric temperature range
Coherent anti-Stokes Raman spectroscopy
Combustion
Materials science
Optics
Thermodynamics
Physics
Chromatography
Date Issued
2023
Abstract
Simultaneous gas phase temperature and water vapor concentration measurement are important to understand reacting flows such as combustion or gas reforming processes. Here, coherent anti-Stokes Raman scattering (CARS) offers the possibility for non-intrusive measurements with a high temporal and spatial resolution. Therefore, this work demonstrates the simultaneous measurement of temperature and relative water vapor–nitrogen concentrations by using dual-pump vibrational coherent anti-Stokes Raman scattering (DPVCARS). A calibration procedure is developed for a temperature range of 473 K to 673 K and a water vapor concentration of 24% to 46% at ambient pressure. This setup is tested with 500 CARS single pulse spectra taken in a gas cell at a known temperature and concentration. Based on these results, information about precision and accuracy can be delivered.
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