Figure 1
From: Trichel pulse in various gases and the key factor for its formation

The V-I curves of negative coronas (a) in pure Ar at various pressures and (b) in mixtures at 30 kPa.
From: Trichel pulse in various gases and the key factor for its formation

The V-I curves of negative coronas (a) in pure Ar at various pressures and (b) in mixtures at 30 kPa.