CARS investigation of collisional shift of the hydrogen Q-branch transitions by water at high temperatures
Clauss, W. and Oschwald, M. and Vereschagin, K. A. and Vereschagin, A. K. and Smirnov, V. V. and Fabelinsky, V. I. (2010) CARS investigation of collisional shift of the hydrogen Q-branch transitions by water at high temperatures. Journal of Raman Spectroscopy, Volume 41 (Issue 8), pp. 897-901. DOI: DOI: 10.1002/jrs.2697.
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A high-resolution (∼0.1 cm−1) spectroscopic method based on the application of a Fabry–Pérot interferometer to the spectral analysis of the coherent anti-Stokes Raman scattering (CARS) signal from an individual Raman transition was used to obtain single-shot spectra of hydrogen Q-branch transitions directly in the flame of a pulsed, high-pressure H2/O2 combustion chamber. Simultaneously with the Fabry–Pérot pattern, a broadband CARS spectrum of the complete H2Q -branch structure was recorded in order to measure the temperature of the probe volume. During every cycle of the combustion chamber, a pressure pulse together with single-shot CARS spectra, providing information on individual line shapes and medium temperature, was recorded. On the basis of the experimental data, the temperature dependences of lineshift coefficients for several Q-branch lines of hydrogen molecules under collisions with water molecules were determined in the temperature range 2100 < T < 3500 K, and an empirical ‘fitting law’ for H2H2O lineshift coefficients is proposed.
|Title:||CARS investigation of collisional shift of the hydrogen Q-branch transitions by water at high temperatures|
|Journal or Publication Title:||Journal of Raman Spectroscopy|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 897-901|
|Keywords:||CARS; spectroscopy; linewidth measurements; collisional shift; Fabry-PÃ©rot interferometry; CARS|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W - no assignement|
|DLR - Research area:||Space|
|DLR - Program:||W - no assignement|
|DLR - Research theme (Project):||W -- no assignement (old)|
|Institutes and Institutions:||Institute of Space Propulsion > Raketenantriebe|
|Deposited By:||Michaela Hanke|
|Deposited On:||06 Dec 2010 17:50|
|Last Modified:||26 Mar 2013 13:23|
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