Notice when comparing the
two plasmas the four regions of operation. Also not the range
of voltage required to reach break down. In the Corona Plasma,
region (1)'s voltage barrier is reduced which allows no voltage
roll-off that are seen in low pressure glow discharges. The
entry into region (2) from region (1) will be transistor-ish
saturation. Region (2) appears to be adequately large
enough for glow discharge tuning before reaching region (3).
Literature suggest that 5x10-4 Amps is the limit to push
a corona atomopheric-plasma before the plasma arcs The
operation range of a corona plasma is 2-5 kV and 10-10-10-5
"dark" Townsend discharge prior to spark ignition
Glow" where voltage is constant or decreases slightly
Glow" Where voltage increases with current
discharge" where the plasma becomes highly conductive.