Gas temperature in transient CO2 plasma measured by Raman scattering

F.K. Brehmer, S. Welzel, B.L.M. Klarenaar, H.J. Meiden, van der, M.C.M. Sanden, van de, R.A.H. Engeln

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Abstract

Rotational Raman scattering on the vibrational ground state of CO2 was performed to determine the gas temperature in narrow-gap dielectric barrier discharges (DBDs). The Raman spectrometer was equipped with a straightforward spectral filtering to mask ca. 30 cm-1 (0.85 nm) centered around the excitation wavelength of 532 nm. Linearisation of the observed transitions (J = 18–42) was applied to retrieve gas temperatures in discharge gaps of 1 mm. The DBD was operated in pure CO2 at atmospheric pressure and non-negligible gas heating of about 160 K was observed at 33 W injected power. Based on a simplified energy balance the gas temperature measurements were extrapolated to a broad range of injected plasma power values (0–60 W).
Original languageEnglish
Pages (from-to)155201-1/6
JournalJournal of Physics D: Applied Physics
Volume48
Issue number15
DOIs
Publication statusPublished - 2015

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