Title :
The photo-injector option for CLIC: past experiments and future developments
Author :
Braun, H.H. ; Chevallay, E. ; Hutchins, S. ; Legros, P. ; Suberlucq, G. ; Trautner, H. ; Ross, I.N. ; Bente, E.
Author_Institution :
CERN, Geneva, Switzerland
Abstract :
The Compact Linear Collider (CLIC) drive beam requires a long bunch train (92 μs) consisting of 42880 bunches with a bunch charge of 17.5 nC in a bunch length of less than 20 ps. This train might be produced by an RF-photo-injector equipped with a Cs-Te cathode. After a short review of experience with such cathodes in the present CLIC Test Facility (CTF2), mainly focused on the production of short trains of high-charge bunches, we will present the scheme foreseen for CLIC and CTF3. The laser will be a diode-pumped MOPA (master oscillator power amplifier), operating at a repetition rate of 469 MHz for CLIC and 1.5 GHz for CTF3. The specific requirements of an RF-gun for this high-current operation are discussed. New experimental results on the photocathode lifetime at high average current are summarized
Keywords :
accelerator RF systems; electron accelerators; linear colliders; particle beam bunching; particle beam injection; photocathodes; solid lasers; 1.5 GHz; 469 MHz; 92 mus; CLIC; CTF2; Compact Linear Collider; Cs-Te cathode; LiYF4:Nd; Nd:YLF laser; RF-gun; YLF:Nd; bunch charge; bunch length; diode-pumped MOPA; master oscillator power amplifier; photo-injector; photocathode lifetime; Cathodes; Electron beams; Laser beams; Laser modes; Laser stability; Optical pulses; Oscillators; Particle beams; Radio frequency; Space vector pulse width modulation;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987614
