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P-17 · Characterization of atmospheric pressure discharges
R. Barni, S. Zanini, R. Siliprandi, P. Esena, C. Riccardi
Dipartimento di Fisica G.Occhialini, Università degli Studi di Milano-Bicocca,
P.za della Scienza, 3 – I-20126 Milano, Italy
Abstract: The interest towards atmospheric pressure discharges for plasma processing of materials is
continuosly growing because of their technological advanteges respect to low pressure discharges. The
development of new plasma source design and their application to processes of surface modification and
functionalization of materials is actively pursued also in the plasma physics community. On the contrary,
research aimed to the development of suitable diagnostics and process control tools is not so advanced and
investigated. Indeed diagnostics of atmospheric pressure plasmas are very demanding because of the short
temporal and the small spatial scales involved in the plasma state and in the different discharge regimes.
Indeed such plasmas are often made up of intermittent and higly localized structures like stremers or
microdischarges. We will presents results concerning the diagnostics of dielectric barrier discharges (DBD)
operated in a streamer regime in a controlled high pressure gas mixture. We presents experimental results
concerning the characteristics of the stremer regime, the influence of the discharge operating parameters
and some interesting features observed in the statistical properties by such intermittent discharges.
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Paper (pdf)