A numerical investigation of atomic oxygen density in an inductively coupled plasma in O2/Ar mixture

Toshikazu Sato, Toshiaki Makabe

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A numerical simulation of an inductively coupled plasma in an O 2(<10%)/Ar mixture has been performed to investigate the production mechanisms and the spatial distribution of the atomic oxygen density. The O(3P) density is four times larger than that of O(1D) and much larger than the metastable molecular oxygen O(a1Δ g) density at 100 mTorr. The dominant mechanism of O(3P) production is electron quenching of O(1D) produced by dissociative excitation by electrons, and the net dissociation rate of O2 is one order of magnitude smaller than that of electron quenching of O(1D). However, quenching of O(1D) and excitation of O(3P) are found to be competitive processes under the present conditions. Both electron and Ar metastable (Ar*) density have the maxima at an O 2 fraction of 1%, though Ar* has little effect on the production of O(3P) and O(1D) under the present high density plasma where Ar* is quenched by high density electrons and consumed.

Original languageEnglish
Article number035211
JournalJournal of Physics D: Applied Physics
Issue number3
Publication statusPublished - 2008 Feb 7


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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