Absolute atomic oxygen and nitrogen densities in radio-frequency driven atmospheric pressure cold plasmas: Synchrotron vacuum ultra-violet high-resolution Fourier-transform absorption measurements - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Applied Physics Letters Année : 2013

Absolute atomic oxygen and nitrogen densities in radio-frequency driven atmospheric pressure cold plasmas: Synchrotron vacuum ultra-violet high-resolution Fourier-transform absorption measurements

K. Niemi
  • Fonction : Auteur
D. O'Connell
  • Fonction : Auteur
N. de Oliveira
  • Fonction : Auteur
D. Joyeux
  • Fonction : Auteur
L. Nahon
  • Fonction : Auteur
Jean-Paul Booth
T. Gans
  • Fonction : Auteur

Résumé

Reactive atomic species play a key role in emerging cold atmospheric pressure plasma applications, in particular, in plasma medicine. Absolute densities of atomic oxygen and atomic nitrogen were measured in a radio-frequency driven non-equilibrium plasma operated at atmospheric pressure using vacuum ultra-violet (VUV) absorption spectroscopy. The experiment was conducted on the DESIRS synchrotron beamline using a unique VUV Fourier-transform spectrometer. Measurements were carried out in plasmas operated in helium with air-like N2/O2 (4:1) admixtures. A maximum in the O-atom concentration of (9.1 ± 0.7)×1020 m−3 was found at admixtures of 0.35 vol. %, while the N-atom concentration exhibits a maximum of (5.7 ± 0.4)×1019 m−3 at 0.1 vol. %.
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Dates et versions

hal-01549425 , version 1 (28-06-2017)

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Citer

K. Niemi, D. O'Connell, N. de Oliveira, D. Joyeux, L. Nahon, et al.. Absolute atomic oxygen and nitrogen densities in radio-frequency driven atmospheric pressure cold plasmas: Synchrotron vacuum ultra-violet high-resolution Fourier-transform absorption measurements. Applied Physics Letters, 2013, 103 (3), pp.034102. ⟨10.1063/1.4813817⟩. ⟨hal-01549425⟩
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