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Schematic diagram of the experimental setup.
The spatial distribution of the ratio of argon to ambient air in the discharge region.
Photographs of the air plasma generated at atmospheric pressure [(a) and (b)] without and [(c) and (d)] with the admixture of flowing argon; (a) and (c) show the top view, while (b) and (d) show the side view.
The applied voltage and discharge current waveforms obtained using ambient air as the working gas (a) without and (b) with the admixture of flowing argon.
The emission spectra of the air plasma (a) without and (b) with the admixture of flowing argon; (c) shows the spatial distribution of emission spectra from the excited OH, , and Ar both in x and y directions.
The comparison of experimental and simulated spectra of (a) transition for measurement and (b) transition for measurement; (c) shows the spatial distribution of the gas temperature both in x and y directions.
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