Abstract

Summary form only given. Non-thermal atmospheric-pressure, helium plasma jet was generated in ambient air with a hollow electrode-based device that was powered by 100 ns, 6 kV pulses. The promising biomedical application of this cold plasma jet for biofilm-mediated infectious disease control <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</sup> motivates diagnostic studies of the reactive plasma species that may contribute significantly to the bactericidal activity. Temporal development and spatial distribution of atomic oxygen density in the pulsed plasma jet were measured using two-photon absorption laser-induced fluorescence spectroscopy. Radially symmetric, the atomic oxygen density distribution along the axis exhibits a wave-like propagating behavior. The entrainment effect of the ambient air on the production of atomic oxygen is discussed.

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