Open AccessNumerical simulation of low pressure gas metal arc plasma
Author(s) -
И. В. Карпов,
А. В. Ушаков,
А. А. Лепешев,
E. A. Dorozhkina,
O. N. Karpova,
A. A. Shaikhadinov,
V. G. Demin
Publication year - 2016
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/155/1/012013
Subject(s) - cathode , plasma , ionization , atomic physics , electron , vacuum arc , arc (geometry) , diffusion , electric arc , plasma arc welding , cathodic arc deposition , plasma diffusion , chemistry , electrode , materials science , ion , physics , thermodynamics , nuclear physics , anode , mathematics , organic chemistry , cathodic protection , geometry
Annotation. In this paper the model of the cathode spot of a vacuum arc isconsidered in the framework of the drift-diffusion representation. It is shownthat the main source of electrons, providing the current transport of vacuumarc, are ionization processes in the cathode zone, while the emission processesare an auxiliary source of initial electrons. The effects associated with thedistribution of electron density in the plasma column of cathode spot, inparticular the formation of a “plasma reaction zone” and “ionization wave”, arediscussed