Trichel pulses in negative corona discharge on trees

Abstract

In this article we present the results of an experimental study of negative corona pulses in air at atmospheric pressure. New, more complex waveforms of pulses in discharge on trees and plants (pine, spruce) are found and compared with waveforms measured in a classical negative corona with metal electrodes. It is also found that the repetition rate of negative plant pulses is much lower than in the case of classical `metal' Trichel pulses. The pulses are less regular and fluctuations of amplitudes and periods are large.