Numerical modelling of low-temperature non-equilibrium plasma of pulsing corona and breakdown

Abstract

The method of determining an existence region of the non-equilibrium plasma of the pulsating negative corona and breakdown is developed. The low-temperature non-equilibrium pulsing plasma of the point-to-plane negative corona and a transition form to the breakdown in nitrogen-oxygen mixture are numerically simulated. It is shown that plasma parameters are pulsing in time as well as in space. In the phase of corona pulse peak, its position adjoins the cathode surface, no further than 0.01 cm. In the initial phase of breakdown, it extends far beyond the surface, within the distance of 0.03 cm. At the same time, the electron temperature changes in almost full anti-phase to the current: from 9100 K to 19000 K during the corona pulse peak and from 6000 K to 20000 K in initial phases of the breakdown. The average plasma density changes in the range 7 × 10 11 − 8 × 10 12 cm −3 in the first case and 1 × 10 13 − 5 × 10 13 cm −3 in the case of breakdown.

Measurement of Ions Penetration Pattern in Point to Grid Atmospheric Corona Discharge

“…[6][7][8][9] Many simulations are also available in literature based on these models. [10][11][12][13][14] The experimental results presented in this paper are about another aspect of ACD which has an important role to specify features of atmospheric plasma and also in shielding the sensitive electronic systems. These experiments have been done to measure the penetration of ions of ACD in free atmospheric conditions.…”