Absolute OH density measurements in an atmospheric pressure dc glow discharge in air with water electrode by broadband UV absorption spectroscopy

Qing Xiong; Zhiqiang Yang; Peter J. Bruggeman

doi:10.1088/0022-3727/48/42/424008

Absolute OH density measurements in an atmospheric pressure dc glow discharge in air with water electrode by broadband UV absorption spectroscopy

Qing Xiong, Zhiqiang Yang, Peter J. Bruggeman

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59 Scopus citations

Abstract

Spatially resolved absolute OH radical density measurements are performed in an atmospheric pressure glow discharge generated in ambient air with water electrode by broadband UV absorption spectroscopy. The radial distributions of OH density and gas temperature are obtained for the positive column, anode and cathode regions both for water-cathode and water-anode discharges. It is found that for both polarities of the water electrode the radial profiles of the ground state OH density and gas temperature are significantly broader than the total discharge emission intensity and the emission intensity originating from OH(A²σ⁺) only. Exceptional large OH densities exceeding 10²³ m^?3 are found. The OH kinetics are discussed in detail.

Original language	English (US)
Article number	424008
Journal	Journal of Physics D: Applied Physics
Volume	48
Issue number	42
DOIs	https://doi.org/10.1088/0022-3727/48/42/424008
State	Published - Sep 23 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
ï¿½ 2015 IOP Publishing Ltd Printed in the UK.

Keywords

OH density distribution
OH kinetics
broadband UV absorption
glow discharge
water electrode

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10.1088/0022-3727/48/42/424008

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title = "Absolute OH density measurements in an atmospheric pressure dc glow discharge in air with water electrode by broadband UV absorption spectroscopy",

abstract = "Spatially resolved absolute OH radical density measurements are performed in an atmospheric pressure glow discharge generated in ambient air with water electrode by broadband UV absorption spectroscopy. The radial distributions of OH density and gas temperature are obtained for the positive column, anode and cathode regions both for water-cathode and water-anode discharges. It is found that for both polarities of the water electrode the radial profiles of the ground state OH density and gas temperature are significantly broader than the total discharge emission intensity and the emission intensity originating from OH(A2σ+) only. Exceptional large OH densities exceeding 1023 m?3 are found. The OH kinetics are discussed in detail.",

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AU - Xiong, Qing

AU - Yang, Zhiqiang

AU - Bruggeman, Peter J.

N1 - Publisher Copyright: ï¿½ 2015 IOP Publishing Ltd Printed in the UK.

PY - 2015/9/23

Y1 - 2015/9/23

N2 - Spatially resolved absolute OH radical density measurements are performed in an atmospheric pressure glow discharge generated in ambient air with water electrode by broadband UV absorption spectroscopy. The radial distributions of OH density and gas temperature are obtained for the positive column, anode and cathode regions both for water-cathode and water-anode discharges. It is found that for both polarities of the water electrode the radial profiles of the ground state OH density and gas temperature are significantly broader than the total discharge emission intensity and the emission intensity originating from OH(A2σ+) only. Exceptional large OH densities exceeding 1023 m?3 are found. The OH kinetics are discussed in detail.

AB - Spatially resolved absolute OH radical density measurements are performed in an atmospheric pressure glow discharge generated in ambient air with water electrode by broadband UV absorption spectroscopy. The radial distributions of OH density and gas temperature are obtained for the positive column, anode and cathode regions both for water-cathode and water-anode discharges. It is found that for both polarities of the water electrode the radial profiles of the ground state OH density and gas temperature are significantly broader than the total discharge emission intensity and the emission intensity originating from OH(A2σ+) only. Exceptional large OH densities exceeding 1023 m?3 are found. The OH kinetics are discussed in detail.

KW - OH density distribution

KW - OH kinetics

KW - broadband UV absorption

KW - glow discharge

KW - water electrode

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Absolute OH density measurements in an atmospheric pressure dc glow discharge in air with water electrode by broadband UV absorption spectroscopy

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