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Kostin, D.

Paper Title Page
TUPMN021 Status of Nb-Pb Superconducting RF-Gun Cavities 962
 
  • J. S. Sekutowicz, J. Iversen, D. Klinke, D. Kostin, W.-D. Moller, A. Muhs
    DESY, Hamburg
  • M. Ferrario
    INFN/LNF, Frascati (Roma)
  • P. Kneisel
    Jefferson Lab, Newport News, Virginia
  • K. Ko, Z. Li, L. Xiao
    SLAC, Menlo Park, California
  • R. S. Lefferts, A. R. Lipski
    SBUNSL, Stony Brook, New York
  • T. Rao, J. Smedley
    BNL, Upton, Long Island, New York
  • P. Strzyzewski
    The Andrzej Soltan Institute for Nuclear Studies, Centre Swierk, Swierk/Otwock
 
  We report on the progress in the status of an electron RF-gun made of two superconductors: niobium and lead. The presented design combines the advantages of the RF performance of bulk niobium superconducting cavities and the reasonably high quantum efficiency of lead. Measured values of quantum efficiency for lead at 2K and the RF-performance of three half-cell niobium cavities with the lead spot exposed to high electric fields are reported in this contribution.  
TUPMS085 Photoemission Tests of a Pb/Nb Superconducting Photoinjector 1365
 
  • J. Smedley, T. Rao
    BNL, Upton, Long Island, New York
  • J. Iversen, D. Klinke, D. Kostin, W.-D. Moller, A. Muhs, J. S. Sekutowicz
    DESY, Hamburg
  • P. Kneisel
    Jefferson Lab, Newport News, Virginia
  • R. S. Lefferts, A. R. Lipski
    SBUNSL, Stony Brook, New York
 
  Funding: This work has been partially supported by the EU Commission, contract no. 011935 EUROFEL-DS5, US DOE under contract number DE-AC02-98CH10886.

We report recent progress in the development of a hybrid lead/niobium superconducting (SC) injector. The goal of this effort is to produce an all-SC injector with the SCRF properties of a niobium cavity along with the superior quantum efficiency (QE) of a lead photocathode. Two prototype hybrid injectors have been constructed, one utilizing a cavity with a removable cathode plug, and a second consisting of an all-niobium cavity arc-deposited with lead in the cathode region. We present the results of QE measurements on these cavities, along with tests of the effect of the laser on the cavity RF performance.