O<SUB>2</SUB> dissociation in plasmas and problems of the O<SUB>2</SUB> cross section set - Archive ouverte HAL Accéder directement au contenu
Poster De Conférence Année : 2017

O2 dissociation in plasmas and problems of the O2 cross section set

Résumé

DC glow discharges in pure O2 in a Pyrex tube were studied to determine dissociation rate constant over a wide range of E/N and thereby to probe O2 dissociation cross section close to threshold. Electric field, E, was found from probe measurements while the gas density, N, from the gas temperature derived from the O2(b1g )  O2(X3g-) emission spectrum. O atom density (as well ratio O/N ratio) was measured by HR TALIF while O/N ratio was also determined by Ar actinometry. Time-resolved actinometry of partially-modulated discharges was used to probe the O loss rate. The O2 dissociation rate constant was determined as a function of E/N, and compared to calculations from different O2 cross section sets. This comparison allowed validation of a the self-consistent cross section set for O2.
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Dates et versions

hal-02611355 , version 1 (18-05-2020)

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  • HAL Id : hal-02611355 , version 1

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Jean-Paul Booth, Olivier Guaitella, Abhyuday Chatterjee, Sergey Zyryanov, Dmitry Lopaev, et al.. O2 dissociation in plasmas and problems of the O2 cross section set. XXXIII ICPIG- International Conference on Phenomena in Ionised Gases, Jul 2017, Estoril/Lisbon, Portugal. 2017. ⟨hal-02611355⟩
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