Title :
Control of discharge initiation in high-intensity electron-beam generators for metal processing
Author_Institution :
Sciaky Ind., Vitry sur Seine, France
fDate :
12/1/1989 12:00:00 AM
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;
Journal_Title :
Electrical Insulation, IEEE Transactions on
