Title :
CANDELA photo-injector experimental results with a dispenser photocathode
Author :
Travier, C. ; Leblond, B. ; Bernard, M. ; Cayla, J.N. ; Thomas, P. ; Georges, P.
Author_Institution :
Lab. de l´´Accel. Lineaire, Orsay, France
Abstract :
The CANDELA photo-injector is a two cell S-band photo-injector. The dispenser photocathode is illuminated by a 500 fs pulse from a frequency-tripled Ti:sapphire laser. In this paper we report charge measurements showing that the dispenser photocathode has a quantum efficiency as high as 10-3. This efficiency decreases with a lifetime of 12 hours, but can be recovered by heating the cathode for 5 minutes
Keywords :
accelerator RF systems; electron guns; electron sources; particle beam injection; photocathodes; 12 h; 3 GHz; 5 min; 500 fs; CANDELA photo-injector; S-band photo-injector; Ti:Al2O3; charge measurements; dispenser photocathode; frequency-tripled Ti:sapphire laser; lifetime; quantum efficiency; Barium; Calcium; Cathodes; Copper; Heating; Laser modes; Optical pulses; Radio frequency; Springs; Tungsten;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505090
