Title :
Cathode sheath formation of corona discharge in liquid argon
Author :
Bonifaci, N. ; Denat, A. ; Atrazhev, V.M. ; Atrazhev, V.V. ; Kochetov, I.V. ; Napartovich, A.P.
Author_Institution :
Lab. d´´Electrostatique et de Materiaux Dielectriques, CNRS & Joseph Fourier Univ., Grenoble, France
Abstract :
A one-dimensional longitudinal model including the cathode sheath, the drift region and the external circuit has been used for conditions close to experiments of a corona discharge in liquid Ar. The model provides the space and time variations of the electric field, electron and positive ion densities in the cathode region, as well as the time variations of the electric current through the discharge. The cathode electric field can reach values as high as several MV/cm. The influence of secondary electron emission due to ion impact has been taken into account. Creation of the cathode sheath occurs rapidly due to the multiplication of cathode-emitted electrons in the strong electric field near the cathode, leading to a fast increase in the ion density in this region.
Keywords :
argon; dielectric liquids; discharges (electric); electron density; ion density; plasma sheaths; secondary electron emission; 1D longitudinal model; Ar; cathode electric field; cathode sheath formation; corona discharge; electric current time variation; electron density; ion impact; liquid argon; multiplication; positive ion density; secondary electron emission; Argon; Artificial intelligence; Atmospheric modeling; Cathodes; Corona; Electrons; Poisson equations; Purification; Space charge; Voltage;
Conference_Titel :
Dielectric Liquids, 2002. ICDL 2002. Proceedings of 2002 IEEE 14th International Conference on
Print_ISBN :
0-7803-7350-2
DOI :
10.1109/ICDL.2002.1022712
