{\rm N}_2 \left({A\,^3\Sigma_{\rm u}^+} \right) behaviour in a N₂–NO surface dielectric barrier discharge in the modulated ac regime at atmospheric pressure

Abstract

Optical, electrical and discharge product measurements were performed in order to reveal the behaviour of N 2 (A 3 Σ u + ) metastables in a surface dielectric barrier discharge driven in N 2 with small NO admixtures in a modulated AC regime. Metastable species were detected both in a thin surface plasma layer and in the space afterglow through Plasma Induced Emission and Optical-Optical Double Resonance Laser Induced Fluorescence, respectively. Basically, the observed N 2 (A 3 Σ u + ) species follow the discharge current oscillations in the plasma layer, while they evolve on a millisecond time-scale due to diffusion through the space afterglow. Emission spectrometry provides a rough estimation of average metastable concentration in a thin surface plasma layer ∼ 9×10 13 cm -3 . Fluorescence measurements then allow an upper estimation of metastable concentration in the space afterglow ≤ 1×10 12 cm -3 .

Influence of Power Modulation on Ozone Production Using an AC Surface Dielectric Barrier Discharge in Oxygen

“…2 consists of a planar SDBD electrode system placed in a polymethylmethacrylate (Plexiglas) chamber equipped with gas feed input/output ports and a high voltage interface. In comparison with our previous SDBD reactor design [12], this new symmetric reactor chamber significantly reduces dead reactor volume. It also allows the variation of the distance between the discharge electrode and opposite Plexiglas surfaces and, consequently, regulates gas flow.…”

Surface Dielectric Barrier Discharge plasma: a suitable measure against fungal plant pathogens

“…The nickel-based electrode exposed to the discharge consists of 17 parallel strips (1 mm wide, 75 mm long and separated by 3 mm) 11,94 . A silver-based induction electrode (74 mm × 74 mm) covers the opposite surface of the alumina plate.…”

“…Among those, the atmospheric pressure low temperature plasma (LTP) represents a novel promising tool 5 . LTPs can be produced with different discharge configurations, such as corona, micro-hollow cathode, gliding arc, atmospheric uniform glow, dielectric barrier discharges, plasma jet and needle [6][7][8][9][10][11][12][13][14] .…”

Diffuse Coplanar Surface Barrier Discharge in Artificial Air: Statistical Behaviour of Microdischarges

“…In the case of low pressure discharges the lifetime of active species could be of the order of hours [46]. In the case of atmospheric pressure DBDs rather microsecond to millisecond timescales are expected [47,48]. Moreover, in the case Instead the remnant active species influence the places of microdischarge occurrence through the distortion of electric field (in case of charged species at the surfaces) and favoring electron production at the pathways of preceding microdischarges (active species in the volume) [42][43][44][45]49,50].…”