A two-dimensional nonstationary model of the initiation of an explosive center beneath the plasma of a vacuum arc cathode spot

Author

Uimanov, I.V.

Author_Institution

Inst. of Electrophys., Ekaterinburg, Russia

fYear

2002

fDate

2002

Firstpage

439

Lastpage

442

Abstract

A numerical two-dimensional nonstationary model is developed to study the initiation of new explosive center beneath the plasma of a vacuum arc cathode spot. The process of heating of a cathode surface microprotrusion has been simulated numerically. The obtained results of this paper show that taking into account the ion impact heating and the electric field of the space charge zone near the cathode surface ensure the "triggering" heat flux power necessary for the development of the Joule heating of the microprotrusion followed by explosion at reasonable values of the ion current and of the geometric parameters of the microprotrusion.

Keywords

cathodes; explosions; plasma density; plasma temperature; space charge; vacuum arcs; cathode surface microprotrusion heating; electron temperature; explosive center; geometric parameters; ion current; ion impact heating; microprotrusion; plasma density; space charge zone electric field; two-dimensional nonstationary model; vacuum arc cathode spot; Cathodes; Current density; Electron emission; Explosions; Explosives; Plasma density; Space charge; Space heating; Surface discharges; Vacuum arcs;

fLanguage

English

Publisher

ieee

Conference_Titel

Discharges and Electrical Insulation in Vacuum, 2002. 20th International Symposium on

Print_ISBN

0-7803-7394-4

Type

conf

DOI

10.1109/ISDEIV.2002.1027403

Filename

1027403