Title :
Insulation of a hollow beam gun
Author :
Bialowons, W. ; Bieler, M. ; Bremer, H.D. ; Decker, F.J. ; Lewin, H.C. ; Scutt, P. ; Wanzenberg, R. ; Weiland, Th
Author_Institution :
DESY, Hamburg, West Germany
fDate :
12/1/1989 12:00:00 AM
Abstract :
The authors are investigating the possibility of accelerating particles with a high gradient in a wake-field transformer. They focus on the short-pulse, high-current hollow-beam gun being developed for this experiment and especially on the insulation problems. A laser-driven gun that works in a solenoid field of 0.2 T was chosen. At a cathode voltage of 100 kV, the gun produces a hollow beam of 109-cm diameter with a space-charge-limited current of 100 A over a pulse length of a few nanoseconds. The cathode voltage is limited by vacuum breakdown, caused by electrons, emitted from the cathode and from the surfaces of optical elements between the electrodes
Keywords :
electric breakdown; electron guns; insulation; solenoids; 100 kV; cathode voltage; hollow beam gun; insulation problems; laser-driven gun; optical elements; solenoid field; space-charge-limited current; vacuum breakdown; wake-field transformer; Acceleration; Breakdown voltage; Cathodes; Electron emission; Laser beams; Optical pulses; Power transformer insulation; Solenoids; Surface emitting lasers; Vacuum breakdown;
Journal_Title :
Electrical Insulation, IEEE Transactions on
