Control of discharge initiation in high-intensity electron-beam generators for metal processing

Author

Sayegh, G.

Author_Institution

Sciaky Ind., Vitry sur Seine, France

Volume

24

Issue

6

fYear

1989

fDate

12/1/1989 12:00:00 AM

Firstpage

959

Lastpage

962

Abstract

Electric fields on the different components that are involved in the high-voltage performance of an electron gun used for welding are evaluated by a numerical method in order to reduce the risk of discharge breakdown during normal operation. A system composed of a tetrode tube placed in series between the power source and the electron gun and acting as a ballast resistor is developed to detect the initiation of a discharge in the electron gun and to stop its evolution toward a breakdown arc. The effect of beam interruption time on metal solidification during welding is addressed

Keywords

arcs (electric); discharges (electric); electric welding; electron guns; tetrodes; ballast resistor; beam interruption time; breakdown arc; discharge breakdown; discharge initiation; electron gun; high-intensity electron-beam generators; metal processing; metal solidification; numerical method; power source; tetrode tube; welding; Dielectrics and electrical insulation; Electric breakdown; Electrodes; Electron beams; Electron tubes; Fault location; Finite element methods; Guidelines; Vacuum breakdown; Welding;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.46320

Filename

46320