Abstract
Absolute atomic oxygen ground state densities in a radio-frequency driven atmospheric pressure plasma jet, operated in a helium-oxygen mixture, are determined using diagnostic based modeling. One-dimensional numerical simulations of the electron dynamics are combined with time integrated optical emission spectroscopy. The population dynamics of the upper O 3p P-3 (lambda = 844 nm) atomic oxygen state is governed by direct electron impact excitation, dissociative excitation, radiation losses, and collisional induced quenching. Absolute values for atomic oxygen densities are obtained through comparison with the upper Ar (2)p(1) (lambda = 750.4 nm) state. Results for spatial profiles and power variations are presented and show excellent quantitative agreement with independent two- photon laser-induced fluorescence measurements.
| Original language | English |
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| Title of host publication | 4TH INTERNATIONAL CONGRESS ON COLD ATMOSPHERIC PRESSURE PLASMAS: SOURCES AND APPLICATIONS, PROCEEDINGS |
| Editors | C Leys, R Morent |
| Place of Publication | GHENT |
| Publisher | Universiteit Gent |
| Pages | 111-112 |
| Number of pages | 2 |
| ISBN (Print) | ***************** |
| Publication status | Published - 2009 |
| Event | 4th International Workshop on Cold Atmospheric Pressure Plasmas - Sources and Applications (CAPPSA 2009) - Ghent Duration: 22 Jun 2009 → 24 Jun 2009 |
Conference
| Conference | 4th International Workshop on Cold Atmospheric Pressure Plasmas - Sources and Applications (CAPPSA 2009) |
|---|---|
| City | Ghent |
| Period | 22/06/09 → 24/06/09 |