Hybrid global model of water cluster ions in atmospheric pressure Ar/H<SUB>2</SUB>O RF capacitive discharges - Archive ouverte HAL Access content directly
Journal Articles Journal of Physics D: Applied Physics Year : 2016

Hybrid global model of water cluster ions in atmospheric pressure Ar/H2O RF capacitive discharges

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Abstract

Water is a trace gas of strong interest for plasma-based medical applications. We use a hybrid global model to simulate a chemically complex Ar/ atmospheric pressure, radio frequency capacitive discharge, including 47 species with positive ion clusters up to . For a discharge gap of 1.5 mm driven at 27.12 MHz, we determine the discharge properties over a range of rf currents (150–500 A m−2) and initial concentrations (0.25–2%). An isothermal plug-flow model is used with a gas residence time of 0.2 s for most calculations, with the gas temperature calculated self-consistently from the input power. The cluster density distributions are determined, and we find that the higher mass cluster densities decrease rapidly with increasing gas temperature. A simplified cluster dynamics analytic model is developed and solved to determine the cluster density distributions, which is in good agreement with the hybrid simulation results.
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Dates and versions

hal-01549340 , version 1 (28-06-2017)

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Antoine Tavant, M.A. Lieberman. Hybrid global model of water cluster ions in atmospheric pressure Ar/H2O RF capacitive discharges. Journal of Physics D: Applied Physics, 2016, 49 (46), pp.465201. ⟨10.1088/0022-3727/49/46/465201⟩. ⟨hal-01549340⟩
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