Author: Huang, H.
Paper Title Page
WEOAI01 APEX Initial Commissioning Results 337
 
  • D. Filippetto, B.J. Bailey, K.M. Baptiste, C.W. Cork, J.N. Corlett, S. De Santis, S.F. Dimaggio, L.R. Doolittle, J.A. Doyle, G. Huang, H. Huang, T.D. Kramasz, S. Kwiatkowski, R.E. Lellinger, W.E. Norum, C. F. Papadopoulos, G.C. Pappas, G.J. Portmann, F. Sannibale, J.W. Staples, M. Vinco, R.P. Wells, M.S. Zolotorev, F.A. Zucca
    LBNL, Berkeley, California, USA
  • F.V. Moroz
    PNPI, Gatchina, Leningrad District, Russia
  • C.M. Pogue
    NPS, Monterey, California, USA
 
  Funding: This work was supported by the Director of the Office of Science of the US Department of Energy under Contract no. DEAC02-05CH11231
APEX the Advanced Photo-injector EXperiment at LBNL is devoted to the development of a MHz-class repetition rate high-brightness electron injector for X-ray FELs. APEX is based on a novel room-temperature 186 MHz RF gun operating in CW mode in conjunction with high quantum efficiency photocathodes capable of the required repetition rates with commercial lasers. APEX is organized in 3 phases. Phase 0 includes the demonstration of several important milestones for the project. The gun must be conditioned at full RF power in CW mode; the vacuum performance, directly impacting the lifetime of photocathodes, needs to be characterized; and different photocathodes will be tested at full repetition rate at the nominal gun energy of 750 keV. In Phase I, a new suite of beam diagnostics will be added to characterize the electron beam at the gun energy and at full repetition rate. In Phase II, a pulsed linac will be added for accelerating the beam at ~30 MeV to reduce space charge effects and measure the brightness performance of the gun when integrated in an injector scheme. Phase 0 is presently under commissioning and the first experimental results from this phase are presented.
 
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