Author: Monaco, L.
Paper Title Page
THPA19 Photocathodes at FLASH 511
 
  • S. Schreiber, H. Hansen, S. Lederer, H.-H. Sahling
    DESY, Hamburg, Germany
  • P. Michelato, L. Monaco, D. Sertore
    INFN/LASA, Segrate (MI), Italy
  
  For sev­eral years now, cae­sium tel­luride pho­to­cath­odes are suc­cess­fully used in the pho­toin­jec­tor of the free elec­tron laser FLASH at DESY, Ger­many. They show a high quan­tum ef­fi­ciency and long life­time. The in­jec­tor pro­duces rou­tinely thou­sand of bunches per sec­ond with a sin­gle bunch charge in the range of 0.1 to 1.5 nC. Re­cent re­sults on life­time, quan­tum ef­fi­ciency, dark­cur­rent, and op­er­at­ing ex­pe­ri­ence is re­ported. At DESY, a new prepa­ra­tion sys­tem has been set-up. First cath­odes have been pro­duced and tested suc­cess­fully.