Absolute atomic hydrogen density measurements in an atmospheric pressure plasma jet: Generation, transport and recombination from the active discharge region to the effluent

Y. Yue, V. S.S.K. Kondeti, P. J. Bruggeman

Research output: Contribution to journalArticle

Abstract

Atomic hydrogen (H) generated by an atmospheric pressure radio frequency (RF) plasma jet is investigated by two-photon absorption laser induced fluorescence in a He-H2 mixture. The reported time and spatially resolved H density profiles enable a detailed analysis of the species generation, transport and decay along the axis of symmetry of the jet. The H density distribution for a continuous RF plasma jet corresponds well with the outcome of a Pseudo-1D plug flow model. In addition, RF power modulation has a strong effect on the H density in the active discharge region but has a negligible effect on the H density in the far effluent.

Original languageEnglish (US)
Article number04LT01
JournalPlasma Sources Science and Technology
Volume29
Issue number4
DOIs
StatePublished - Jan 1 2020

Keywords

  • Atmospheric pressure plasma jet
  • atomic hydrogen
  • plug-flow model
  • RF modulation
  • TALIF

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