The effect of the magnetic field on the positive corona discharge

Inception of positive wire-cylinder corona discharges in air in crossed electric and magnetic fields

“…At lower r 0 δ, the dependence of E 0 /δ on B/δ is non-monotonous. A similar non-monotonous character of the dependence of the corona inception voltage on the magnetic field was observed in experiments [12,13]. The inception voltages calculated for the conditions of these experiments agree within 5% with the measured data.…”

“…The above results of the analysis of discharge inception in strongly nonuniform electric fields do not correspond to the experimental data [12,13] on the inception of positive corona discharges in low-pressure air, in wire-cylinder gaps with the ratio R/r 0 of cylinder and wire radii exceeding 10 2 . In these works, a decrease in inception voltages at the application of magnetic fields has been observed.…”

“…Interesting results were also obtained in experimental works on the inception of corona discharges in magnetic fields. In particular, a rather unexpected characteristic of the variation of the inception voltage in crossed fields has been observed for positive corona discharges in low-density air between thin wires and concentric cylinders [12,13]. Our work is aimed at clarifying the effects of applied magnetic fields on the inception of positive corona discharges in air.…”

“…Figure 5 shows the calculated, by solving equation ( 5), values of the reduced inception field at the wire versus r 0 δ for various gas densities. The inception field E 0 /δ evaluated using inception voltages measured in [12,13,[39][40][41], at δ around 0.01, are also provided. Note that the ionization integral K at δ = 0.01 in this range of r 0 δ is about 6 (see below).…”

“…Figure 9 presents the values of the inception voltage for positive corona discharges versus the reduced magnetic field for conditions of experiments [12,13]. The results obtained by solving equation ( 5) are shown, together with the measured values.…”