In-situ analysis of methane plasmas with mid-infrared supercontinuum-based Fourier-transform spectroscopy

IF 2 3区物理与天体物理 Q3 OPTICS Applied Physics B Pub Date : 2024-12-10 DOI:10.1007/s00340-024-08370-2

Roderik Krebbers, Ningwu Liu, Wessel Averink, Frans J. M. Harren, Tom Butterworth, Gerard van Rooij, Amir Khodabakhsh, Simona M. Cristescu

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Abstract

The conversion of methane (CH₄) into the hydrocarbons ethane (C₂H₆) and acetylene (C₂H₂) in plasma is investigated in the first in-situ study using a mid-infrared supercontinuum source and a Fourier transform spectrometer. Due to the spatial coherence of the supercontinuum source, it is possible to probe the plasma over a path length of 3.5 m and observe CH₄, C₂H₆, and C₂H₂ with concentrations below percent level at a few mbar pressure. The broad spectral range of the supercontinuum source (1.4–4.1 μm) covers entire rovibrational bands of molecules, allowing simultaneous detection of the rotational and vibrational temperature of CH₄ and C₂H₂. The ability to study these experimental parameters in situ opens new possibilities for understanding and optimizing plasma-based chemical conversions.

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来源期刊

Applied Physics B 物理-光学

CiteScore

4.00

自引率

4.80%

发文量

202

审稿时长

3.0 months

期刊介绍： Features publication of experimental and theoretical investigations in applied physics Offers invited reviews in addition to regular papers Coverage includes laser physics, linear and nonlinear optics, ultrafast phenomena, photonic devices, optical and laser materials, quantum optics, laser spectroscopy of atoms, molecules and clusters, and more 94% of authors who answered a survey reported that they would definitely publish or probably publish in the journal again Publishing essential research results in two of the most important areas of applied physics, both Applied Physics sections figure among the top most cited journals in this field. In addition to regular papers Applied Physics B: Lasers and Optics features invited reviews. Fields of topical interest are covered by feature issues. The journal also includes a rapid communication section for the speedy publication of important and particularly interesting results.