Abstract
Broadband mid-infrared (MIR) spectroscopy is a well-established and valuable diagnostic technique for reactive plasmas. Plasmas are complex systems and consist of numerous (reactive) types of molecules; it is challenging to measure and control reaction specificity with a good sensitivity. Here, we demonstrate the first use of a novel MIR supercontinuum (SC) source for quantitative plasma spectroscopy. The SC source has a wide spectral coverage of 1300-2700 cm(-1) (wavelength range 3.7-7.7 mu m), thus enabling broadband multispecies detection. The high spatial coherence of the MIR SC source provides long interaction path lengths, thereby increasing the sensitivity for molecular species. The combination of such a SC source with a custom-built FTIR spectrometer (0.1 cm(-1) spectral resolution) allows detection of various gases with high spectral resolution. We demonstrate its potential in plasma applications by accurate identification and quantification of a variety of reaction products (e.g. nitrogen oxides and carbon oxides) under low-pressure conditions, including the molecular species with overlapping absorbance features (e.g. acetone, acetaldehyde, formaldehyde, etc.).
Original language | English |
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Article number | 9642 |
Number of pages | 11 |
Journal | Scientific Reports |
Volume | 12 |
Issue number | 1 |
DOIs | |
Publication status | Published - 10 Jun 2022 |
Keywords
- LASER-ABSORPTION-SPECTROSCOPY
- PRESSURE GLOW-DISCHARGE
- CARBON-DIOXIDE
- MU-M
- CO2 HYDROGENATION
- SYNGAS PRODUCTION
- GENERATION
- METHANE
- TECHNOLOGY
- CONVERSION