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Title: Energy resolved actinometry for simultaneous measurement of atomic oxygen densities and local mean electron energies in radio-frequency driven plasmas

A diagnostic method for the simultaneous determination of atomic oxygen densities and mean electron energies is demonstrated for an atmospheric pressure radio-frequency plasma jet. The proposed method is based on phase resolved optical emission measurements of the direct and dissociative electron-impact excitation dynamics of three distinct emission lines, namely, Ar 750.4 nm, O 777.4 nm, and O 844.6 nm. The energy dependence of these lines serves as basis for analysis by taking into account two line ratios. In this frame, the method is highly adaptable with regard to pressure and gas composition. Results are benchmarked against independent numerical simulations and two-photon absorption laser-induced fluorescence experiments.
Authors:
; ; ;  [1]
  1. York Plasma Institute, Department of Physics, University of York, York YO10 5DD (United Kingdom)
Publication Date:
OSTI Identifier:
22395511
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 23; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BENCHMARKS; COMPUTERIZED SIMULATION; ELECTRON COLLISIONS; ELECTRONS; ENERGY DEPENDENCE; EXCITATION; FLUORESCENCE; LASER RADIATION; OXYGEN; PHOTONS; PLASMA DIAGNOSTICS; PLASMA JETS; PLASMA SIMULATION; RADIOWAVE RADIATION