Figure 2
From: Improved performance of a barrier-discharge plasma jet biased by a direct-current voltage
Discharge images of the plasma plumes between the coaxial DBD jet and the plate electrode under different Vb: (a) 0 kV, (b) 10 kV, (c) 15 kV. (d,e) correspond to (a,c), respectively, except that a single-electrode jet is used. (f) is the same conditions with (c) except that the plate electrode is replaced by the tungsten needle. The exposure time is 0.1 s.
