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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…mehr

Produktbeschreibung
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.
Autorenporträt
Villu Repän, PhD in optics and spectroscopy: Studied physics at
University 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).