Steady-State Partially Constricted Glow Discharge

It is known that, at intermediate gas pressures, the increase in discharge current leads to the constriction of the positive column of the diffuse glow discharge and the formation of the bright filament. Recently, it has been shown that, under certain experimental conditions, constricted and diffuse modes can simultaneously exist in the discharge tube with a constant diameter, i.e., steady-state partially constricted discharge can be realized. Here, we present images and discuss specific features of such kind of discharge in argon-nitrogen mixtures.