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(Color online) Current-voltage characteristics of (a) the Ar rf APGD with the inset showing an enlarged part of its current-voltage relationship and (b) the Ar rf DBD. Open markers indicate the mode and the black solid markers indicate the normal glow mode. Red and blue solid markers indicate the constricted mode and the usual large-volume mode.
(Color online) Plasma images of (a) the Ar rf APGD and (b) the Ar rf DBD. Letters on the left hand side of the images corresponds to the same letters in Fig. 1.
(Color online) Current dependence of the optical emission intensity at in the rf APGD and the rf DBD. Open markers indicate the mode, whereas the red and blue solid markers indicate the and modes, respectively.
Optical emission spectrum of the Ar rf DBD with the inset being the current dependence of gas temperature in the rf APGD and the rf DBD.
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