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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.19 SNIP: 0.341 CiteScore™: 0.43

ISSN Print: 1093-3611
ISSN Online: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v13.i3-4.90
pages 359-372

SPECTROSCOPIC CHARACTERIZATION OF AN ATMOSPHERIC PRESSURE DBD AFTERGLOW UNDER UNIPOLAR AND BIPOLAR PULSED EXCITATION

E. Panousis
Université de Pau et des Pays de l'Adour, Laboratoire d'Electronique des Gaz et des Plasmas LEGP, IPREM Technopole Hélioparc, 2 Av. Pdt Angot, 64013 Pau
F. Clement
Université de Pau et des Pays de l'Adour, Laboratoire d'Electronique des Gaz et des Plasmas LEGP, IPREM Technopole Hélioparc, 2 Av. Pdt Angot, 64013 Pau
Nofel Merbahi
LAPLACE, Universite Paul Sabatier de Toulouse, Centre National de la Recherche Scientifique, Institut National Polytechnique de Toulouse, France
Andre Ricard
Universite de Toulouse; UPS, INPT; LAPLACE (Laboratoire Plasma et Conversion d'Energie), Bat. 3R2, 118 route de Narbonne, F-31062 Toulouse cedex 9, France; CNRS, LAPLACE, F-31062 Toulouse, France
Mohammed Yousfi
LAPLACE, Universite Paul Sabatier de Toulouse, Centre National de la Recherche Scientifique, Institut National Polytechnique de Toulouse, 118 Route de Narbonne, Toulouse, France
B. Held
Université de Pau et des Pays de l'Adour, Laboratoire d'Electronique des Gaz et des Plasmas LEGP, IPREM Technopole Hélioparc, 2 Av. Pdt Angot, 64013 Pau
J.-F. Loiseau
Université de Pau et des Pays de l'Adour, Laboratoire d'Electronique des Gaz et des Plasmas LEGP, IPREM Technopole Hélioparc, 2 Av. Pdt Angot, 64013 Pau
O. Eichwald
Université de Toulouse, LAPLACE, UMR 5213 du CNRS, Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France
F. Gaboriau
Université de Toulouse, LAPLACE, UMR 5213 du CNRS, Université Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse Cedex 9, France

ABSTRACT

This experimental work deals with the study via spectroscopic diagnostics of the afterglow issued from an atmospheric pressure Dielectric Barrier Discharge (DBD) reactor driven by two distinct High Voltage (HV) generators. The first High Voltage generator delivers unipolar (positive) square pulses of variable rise/fall time, frequency, amplitude and pulse duration. The second one delivers bipolar HV pulses of variable frequency and amplitude. After a primary electrical analysis of the behavior of the two systems, attention is drawn in the production of active species in the case of N2 and Air DBD's in the afterglow.
The aforementioned species' densities are estimated in these experimental conditions via optical emission spectroscopy for the N2 afterglow, whereas the well known absorption method is used in the case of the Air afterglow.
It is shown that the unipolar mode of excitation is more efficient in the production of ozone whereas the bipolar one excels in the production of atomic Nitrogen and N2(A) metastables. These species can be used in a wide variety of surface and gas treatment applications in atmospheric pressure conditions.


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