Infrared emission spectroscopy of CO₂ at high temperature. Part I: Experimental setup and source characterization

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• 作者：S. Depraz^a ;   ; ^b ;   ; ^c ; M.Y. Perrin^a ;   ; ^b ; A. Soufiani^a ;   ; ^b ;   ; ^{anouar.soufiani@em2c.ecp.fr}
• 关键词：FTIR emission spectroscopy ; Microwave plasma source ; Temperature measurement ; Tube effects ; CO₂ infrared radiation
• 刊名：Journal of Quantitative Spectroscopy and Radiative Transfer
• 出版年：2012
• 出版时间：January 2012
• 年：2012
• 卷：113
• 期：1
• 页码：1-13
• 全文大小：2049 K

文摘

An experimental setup is developed to analyze infrared emission of CO₂ plasmas at atmospheric pressure and temperatures up to 5000 K. A microwave discharge is used to produce the hot gas mixture and emission is recorded by a Fourier transform spectrometer with a spectral resolution between 0.01 and 0.1 cm^?. The plasma is confined inside quartz or sapphire tubes which perturb the measurements through refraction, reflection, absorption and emission. We present in this part the experimental setup, an analysis of tube effects, and the characterization of the plasma in terms of temperature and molar fraction distributions using CO emission in the overtone vibrational bands . Analysis of the measurements of CO₂ emission in the and regions, and comparisons with calculations using different spectroscopic databases are given in the companion paper (Depraz et al., in press) .