Dark current in high-gradient accelerator

Author

Bienvenu, G.

Author_Institution

Lab. de l´´Accel. Lineaire, Univ. Paris Sud, Orsay, France

Volume

24

Issue

6

fYear

1989

fDate

12/1/1989 12:00:00 AM

Firstpage

1037

Lastpage

1039

Abstract

A report is presented on the first measurements from a program to study high-gradient linear e⁺/e^- accelerators, as part of a research and development program on linear colliders. The experimental setup is a realistic S-band, traveling-wave, disk-loaded warm accelerating structure, fed by long RF pulses. The dark current produced by field emission has been investigated. The peak current is about 0.2 mA/m and the steady current 40 μA/m, for an accelerating field of 30 MV/m. The global field enhancement is β=140. The level of dose rate is under 4 rad/h

Keywords

electron accelerators; linear accelerators; S-band; accelerating field; dark current; disk-loaded warm accelerating structure; dose rate level; field emission; global field enhancement; high-gradient accelerator; high-gradient linear e⁺/e^- accelerators; linear colliders; long RF pulses; measurements; peak current; realistic structure; steady current; traveling-wave; Acceleration; Copper; Current measurement; Dark current; Dielectric breakdown; Electron beams; Electron emission; Linear accelerators; Shape; Water heating;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.46334

Filename

46334