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King, F.

Paper Title Page
MO6RFP088 Operating a Tungsten Dispenser Cathode in Photo-Emission Mode 575
 
  • S.M. Gierman, P.R. Bolton, W.J. Corbett, G.R. Hays, F. King, R.E. Kirby, J.F. Schmerge, J.J. Sebek
    SLAC, Menlo Park, California
 
 

Funding: Supported by US DOE under contract DE-AC03-76SF00515.


The Stanford Synchrotron Radiation Laboratory operates a thermionic radio-frequency gun as part of its injector for the SPEAR 3 storage ring. In order to generate the high bunch charge required for top-off injection, it may be advantageous to operate the thermionic cathode as a photo-emitter. In this note we report on measurements of the wavelength dependence of the quantum efficiency of a tungsten dispenser cathode in a low-field environment, and on high-power tests of the injector in photoemission mode.