OH density measurements in nanosecond pulsed discharges in atmospheric pressure N2-H2O mixtures

T. Verreycken; P. J. Bruggeman

doi:10.1088/0963-0252/23/1/015009

OH density measurements in nanosecond pulsed discharges in atmospheric pressure N₂-H₂O mixtures

T. Verreycken, P. J. Bruggeman

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26 Scopus citations

Abstract

Time and spatially resolved OH densities are determined in a nanosecond pulsed filamentary discharge in N₂-H₂O for varying water concentration using laser-induced fluorescence (LIF). The OH densities are absolutely calibrated using Rayleigh scattering. A dip in the LIF signal is found at the centre of the filament. In the case of 2.6% H₂O a remarkable increase in OH density is found in the far afterglow and is discussed in analogy with the pink splash or pink afterglow. It is believed that the large amount of energy released in the recombination of atomic nitrogen plays an important role in the production of OH in the far afterglow.

Original language	English (US)
Article number	015009
Journal	Plasma Sources Science and Technology
Volume	23
Issue number	1
DOIs	https://doi.org/10.1088/0963-0252/23/1/015009
State	Published - Feb 2014
Externally published	Yes

Keywords

OH dynamics
atmospheric pressure plasma
laser induced fluorescence
nanosecond pulsed discharges

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10.1088/0963-0252/23/1/015009

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Cite this

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abstract = "Time and spatially resolved OH densities are determined in a nanosecond pulsed filamentary discharge in N2-H2O for varying water concentration using laser-induced fluorescence (LIF). The OH densities are absolutely calibrated using Rayleigh scattering. A dip in the LIF signal is found at the centre of the filament. In the case of 2.6% H2O a remarkable increase in OH density is found in the far afterglow and is discussed in analogy with the pink splash or pink afterglow. It is believed that the large amount of energy released in the recombination of atomic nitrogen plays an important role in the production of OH in the far afterglow.",

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N2 - Time and spatially resolved OH densities are determined in a nanosecond pulsed filamentary discharge in N2-H2O for varying water concentration using laser-induced fluorescence (LIF). The OH densities are absolutely calibrated using Rayleigh scattering. A dip in the LIF signal is found at the centre of the filament. In the case of 2.6% H2O a remarkable increase in OH density is found in the far afterglow and is discussed in analogy with the pink splash or pink afterglow. It is believed that the large amount of energy released in the recombination of atomic nitrogen plays an important role in the production of OH in the far afterglow.

AB - Time and spatially resolved OH densities are determined in a nanosecond pulsed filamentary discharge in N2-H2O for varying water concentration using laser-induced fluorescence (LIF). The OH densities are absolutely calibrated using Rayleigh scattering. A dip in the LIF signal is found at the centre of the filament. In the case of 2.6% H2O a remarkable increase in OH density is found in the far afterglow and is discussed in analogy with the pink splash or pink afterglow. It is believed that the large amount of energy released in the recombination of atomic nitrogen plays an important role in the production of OH in the far afterglow.

KW - OH dynamics

KW - atmospheric pressure plasma

KW - laser induced fluorescence

KW - nanosecond pulsed discharges

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