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

Research output: Contribution to journalArticlepeer-review

34 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 languageEnglish (US)
Article number424008
JournalJournal of Physics D: Applied Physics
Volume48
Issue number42
DOIs
StatePublished - Sep 23 2015

Keywords

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

Fingerprint Dive into the research topics of 'Absolute OH density measurements in an atmospheric pressure dc glow discharge in air with water electrode by broadband UV absorption spectroscopy'. Together they form a unique fingerprint.

Cite this