Design of a high-current injector and transport optics for the ilc electron source

Author

Zhou, F. ; Batygin, Y. ; Brachmann, A. ; Clendenin, J. ; Miller, R.H. ; Sheppard, J.C. ; Woodley, M.D.

Author_Institution

SLAC, Menlo Park

fYear

2007

fDate

25-29 June 2007

Firstpage

3127

Lastpage

3129

Abstract

A train of 1.3-ns micro bunches of longitudinally polarized electrons are generated in a 140-kV DC-gun based injector in the International Linear Collider electron source; a bunching system with extremely high bunching efficiency to compress the micro-bunch down to 20 ps FWHM is designed. Complete optics to transport the electron bunch to the entrance of the 5-GeV damping ring injection line is developed. Start-to-end multi-particle tracking through the beamline is performed including the bunching system, pre-acceleration, vertical chicane, 5- GeV superconducting booster linac, spin rotators and energy compressor. With optimizations of energy compression, 94% of the electrons from the DC-gun are captured within the damping ring 6-D acceptance - A_x + A_y les 0.09 m and DeltaEtimesDeltaz les (plusmn25 MeV) times (plusmn3.46 cm) - at the entrance of the damping ring injection line.

Keywords

beam handling equipment; electron accelerators; electron beams; electron guns; electron optics; electron sources; linear accelerators; particle beam bunching; particle beam injection; superconducting devices; DC-gun based injector; ILC electron source; beamline; bunching system; damping ring injection line; electron optics; electron volt energy 5 GeV; energy compressor; multiparticle tracking; polarized electron bunches; preacceleration; spin rotators; superconducting booster linac; time 1.3 ns; vertical chicane; voltage 140 kV; Acceleration; Damping; Electron beams; Electron optics; Electron sources; L-band; Linear particle accelerator; Optical design; Optical polarization; Ultraviolet sources;

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.2007.4440690

Filename

4440690