Title :
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
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 - Ax + Ay 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;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4440690
