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Updated: Aug 14, 2026

An Atmospheric Pressure Plasma Setup to Investigate the Reactive Species Formation
Published on: November 3, 2016
Diagnostics of the electronegative plasma sheath at low pressures using microparticles
B M Annaratone1, T Antonova, H M Thomas
1Centre for Interdisciplinary Plasma Science, Max-Planck Institut für Extraterrestrische Physik, D-85740 Garching, Germany.
Abstract:
Levitated particles are a new powerful diagnostic of the midplasma sheath region. They can reveal features undetectable either to plasma or to surface measurements. The equilibrium position of microparticles suspended in an oxygen plasma sheath, together with a model of the levitation force and Langmuir probe measurements, gives evidence of secondary electropositive plasmas in the already established plasma sheath, in the range of parameters where the modified Bohm criterion breaks down into multiple solutions.
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