Title :
Power tests of a PLD film MG photocathode in a RF gun
Author :
Gatti, G. ; Cultrera, L. ; Tazzioli, F. ; Perrone, A. ; Musumeci, P. ; Moody, J.
Author_Institution :
INFN/LNF, Frascati
Abstract :
Metallic film photo-cathodes are rugged, have a fast response and good emission uniformity. Mg has also a relevant Quantum Efficiency (QE) in the near UV. A cathode suitable for a 1.5 cells S-band RF gun has been produced by depositing an Mg film on Cu by Pulsed Laser Deposition (PLD) technique. After different optimizations, stable good results have been reached in the low field measurement scenario. A sample was deposited on a gun flange and tested in the 1.6 cell injector at UCLA Pegasus facility to prove cathode resistance in a high field environment. The results are described.
Keywords :
magnesium; photocathodes; pulsed laser deposition; Mg; Mg film; RF gun; cathode resistance; metallic film photocathodes; pulsed laser deposition technique; Cathodes; Copper; Dark current; Flanges; Optical pulses; Pollution measurement; Pulsed laser deposition; Radio frequency; Substrates; Testing;
Conference_Titel :
Particle Accelerator Conference, 2007. PAC. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
978-1-4244-0916-7
DOI :
10.1109/PAC.2007.4440960
