Dark region
S2 : Area of the dark region
J2 : Discharge current density
Bright region
S1 : Area of the bright region
J1 : Discharge current density
The area of the bright region increased with an increase in the dielectric barrier temperature
The bright region is expanded with the increased dielectric-barrier temperature
Calculation of the discharge current density of each region
Relationship between the discharge current and bright region area
Each discharge current density were calculated from the area of the dark and bright region, the slope of the graph shown on the left figure, discharge current