6 papers
Proof of operation of a micro-hollow cathode discharge driven by a true ns-pulsed high voltage: emission properties and atomic nitrogen production
Nikolaos Chazapis, Dimitrios Stefas, Alexandra Brisset +5
The implementation of Micro-Hollow Cathode Discharges (MHCDs) for the efficient and controlled dissociation of molecular nitrogen into reactive N-atoms remains a central challenge…
Electrohydrodynamic coupling and stochastic branching in a miniaturized ns-pulsed He plasma jet
Y Agha, K Giotis, D Stefas +7
This study focuses on the complex coupling between discharge and flow properties in a ns-pulsed He micrometer scale atmospheric pressure plasma jet (APPJ). This is investigated…
A Comprehensive multi-species comparison of rotational temperature probes in a DC Ar/N micro-hollow cathode discharge
Dimitrios Stefas, Belkacem Menacer, Alice Remigy +4
Accurate gas temperature () determination in microplasmas is critical for optimizing their applications, yet isolated diagnostic approaches may yield misleading result…
Ultrafast ps--TALIF and streak camera diagnostics of atomic hydrogen in a helium microplasma jet
Dimitrios Stefas, Yanis Agha, Laurent Invernizzi +6
Picosecond two-photon absorption laser induced fluorescence (ps--TALIF) is combined with a streak camera (1 ps highest temporal resolution) to probe the effective lifetime ($…
Hexagonal boron nitride thin film synthesis with a ns-pulsed MHCD: in-situ plasma diagnostics and post-growth film characterization
Belkacem Menacer, Dimitrios Stefas, Nikolaos Chazapis +3
Hexagonal boron nitride (h-BN) is deposited on Si <100> wafer (20 cm2) via Plasma Enhanced Chemical Vapor Deposition (PECVD) using a ns-pulsed N2/Ar Micro Hollow Cathode D…
Discharge dynamics in a cylindrical SDBD prototype reactor under ns-pulsed and sinusoidal AC operation
Konstantinos Giotis, Dimitrios Stefas, Yanis Agha +5
We developed a prototype reactor generating surface dielectric barrier discharges (SDBDs) in ambient air, designed for consistent operation while preventing constructive material d…