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

Volume

24

Issue

6

fYear

1989

fDate

12/1/1989 12:00:00 AM

Firstpage

955

Lastpage

958

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;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.46319

Filename

46319