UV Raman measurements

UV Raman spectra are used to calibrate 2D temperature fields obtained, e.g., from OH, NO or formaldeyde LIF measurements. Here we present N2 Raman spectra (Raman shift: 2331 cm-1). For the calibration purpose Raman measurements at one point in the 2D field are sufficient. However, 2D Raman measurements are possible, if the background from e.g. LIF is small or if it can be suppressed using filtering. Temperatures can be obtained from measured Raman spectra using peak ratios or fitting the spectra with e.g. RAMSES (RAMan Spectra Efficient Simulation).

Left: set-up for Raman measurements // Right: OH-LIF distributions
Left: set-up for Raman measurements | Right: OH-LIF distributions
Measured and simulated N2-Raman spectrum
IPHT Jena

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Dr. Wolfgang Paa
Fon +49 (0) 3641 · 206 411
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