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

Journal Article · Mon Dec 08 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4903931· OSTI ID:22395511

Greb, Arthur; Niemi, Kari; O'Connell, Deborah; Gans, Timo ^[1]

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1. York Plasma Institute, Department of Physics, University of York, York YO10 5DD (United Kingdom)

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.

• OSTI ID: 22395511
• Journal Information: Applied Physics Letters, Vol. 105, Issue 23; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

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