Injector design for the 4GLS high average current loop

Author

McKenzie, W. ; Militsyn, B.L. ; Terekhov, A.S.

Author_Institution

STFC Daresbury Lab., Warrington

fYear

2007

fDate

25-29 June 2007

Firstpage

1100

Lastpage

1102

Abstract

The proposed 4th Generation Light Source (4GLS) consists of three electron branches. We present the design of the injector for the High Average Current Loop which feeds spontaneous light sources and a Vacuum Ultraviolet FEL. The injector aims to provide 77 pC bunches at a repetition rate of up to 1.3 GHz which corresponds to an average current of 100 mA. It consists of a 500 kV GaAs based DC photocathode electron gun equipped with a photocathode preparation facility, followed by a normal- conducting buncher cavity and a 10 MeV superconducting RF booster. Simulations are presented which show the injector provides a beam with a normalised rms transverse emittance of less than 3 pi-mm-mrad and a bunch length of about 2 ps.

Keywords

accelerator RF systems; accelerator cavities; electron guns; free electron lasers; light sources; particle beam bunching; particle beam injection; photocathodes; superconducting devices; 4th Generation Light Source; GaAs DC photocathode; High Average Current Loop; beam dynamics; electron gun; free-electron lasers; injector design; normal-conducting buncher cavity; superconducting RF booster; transverse emittance; vacuum ultra-violet region; Cathodes; Electron beams; Gallium arsenide; Laboratories; Light sources; Radio frequency; Solenoids; Superconducting photodetectors; Superconducting transmission lines; X-ray lasers;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2007. PAC. IEEE

Conference_Location

Albuquerque, NM

Print_ISBN

978-1-4244-0916-7

Type

conf

DOI

10.1109/PAC.2007.4440995

Filename

4440995