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Electron kinetics in radio-frequency atmospheric-pressure microplasmas

journal contribution
posted on 2008-02-25, 12:13 authored by Felipe Iza, Jae Koo Lee, Michael G. Kong
The kinetic study of three radio-frequency atmospheric-pressure helium microdischarges indicates that the electron energy probability function is far from equilibrium, and three electron groups with three distinct temperatures are identified. The relative population of electrons in different energy regions is strongly time modulated and differs significantly from values recently reported from fluid analyses. It is also shown that a flux of energetic electrons (ε>5 eV) that comprises up to 50% of the total electron flux can reach the electrodes. This energetic electron flux provides a new means of delivering energy to the electrodes and tuning the surface chemistry in atmospheric-pressure discharges. The three electron groups and the engineering of an energetic electron flux might open up a new paradigm in plasma-surface chemistry that has not been considered up until now.



  • Mechanical, Electrical and Manufacturing Engineering


IZA, F., LEE, J.K. and KONG, M.G., 2007. Electron kinetics in radio-frequency atmospheric-pressure microplasmas. Physical Review Letters, 99, 075004


© The American Physical Society

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This article is Restricted Access. It was published in the journal, Physical Review Letters [© The American Physical Society] and is available at: http://prl.aps.org/ or http://dx.doi.org/10.1103/PhysRevLett.99.075004




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