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Schematic diagram of the experimental setup.
(a) Discharge images taken by a digital camera with the gas gap from 1.1 to 5.5 mm (, ); (b) the magnified image in the gap of 4.4 mm; (c) RMS current vs RMS applied voltage in the argon atmospheric pressure rf-DBD with the gas gap from 1.1 to 5.5 mm.
Lissajous plot of voltage–electric charge for an argon atmospheric pressure rf DBD operating in mode (, , , , double barrier, gas ).
OES (at position A) of the rf-DBD in the gap of 4.4 mm with a single dielectric barrier layer (, , , , phase ). The inset shows the discharge image (exposure time is 1/600 s), with a magnified image showing positions A, B, and C.
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