Low current mode of negative corona

The paper presents the results of experimental and
theoretical study of the low current mode of negative
corona. The purpose of the study was to find the
electron emission mechanism that is responsible for
the rise of negative corona pulses.
The main idea of the study based on earlier
observations that the presence of non-metallic
inclusion at the electrode favours the rise of
negative corona discharge. For this reason a
systematic study of negative corona was carried out
also with electrodes, which had coatings of known
composition and thickness.
The results of the study confirm that the rise of
negative corona is controlled by Fowler-Nordheim type
of emission, which occurs at the metal-dielectric
interface.

Autorentext

Villu Repän, PhD in optics and spectroscopy: Studied physics atUniversity of Tartu. Designer at Insenerlahendused LLC, Tartu,Estonia.Matti Laan, PhD in plasma physics and chemistry: Assoc. Professor, head of Gas Discharge Laboratory (Institute of Physics,University of Tartu).

Klappentext

The paper presents the results of experimental andtheoretical study of the low current mode of negativecorona. The purpose of the study was to find theelectron emission mechanism that is responsible forthe rise of negative corona pulses.The main idea of the study based on earlierobservations that the presence of non-metallicinclusion at the electrode favours the rise ofnegative corona discharge. For this reason asystematic study of negative corona was carried outalso with electrodes, which had coatings of knowncomposition and thickness.The results of the study confirm that the rise ofnegative corona is controlled by Fowler-Nordheim typeof emission, which occurs at the metal-dielectricinterface.