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Anderson, T. G.

Paper Title Page
WPAP042 Progress on Using NEA Cathodes in an RF Gun 2708
 
  • R.P. Fliller, T. G. Anderson, H. Edwards
    Fermilab, Batavia, Illinois
  • H. Bluem, T. Schultheiss
    AES, Medford, NY
  • M. Huening
    DESY, Hamburg
  • C.K. Sinclair
    Cornell University, Department of Physics, Ithaca, New York
 
  Funding: This work was supported by Universities Research Association Inc. under contract DE-AC02-76CH00300 with the U.S. DOE and by NICADD. AES personnel were supported under DOE SBIR contract #DE-FG02-04ER838.

RF guns have proven useful in multiple accelerator applications, and are an attractive electron source for the ILC. Using a NEA GaAs photocathode in such a gun allows for the production of polarized electron beams. However the lifetime of a NEA cathode in this environment is reduced by ion and electron bombardment and residual gas oxidation. We report progress made with studies to produce a RF gun using a NEA GaAs photocathode to produce polarized electron beams. Attempts to reduce the residual gas pressure in the gun are discussed. Initial measurements of ion flux through the cathode port are compared with simulations of ion bombardment. Future directions are also discussed.

 
RPPE051 NEG Pumping Strip Inside Tevatron B2 Magnets 3144
 
  • A.Z. Chen, T. G. Anderson, B.M. Hanna
    Fermilab, Batavia, Illinois
 
  Funding: DOE

NEG pumping strips were installed inside four Tevatron B2 Magnets in order to improve the vacuum environment in B2 magnets that have embedded unbakable vacuum chamber. The prelimary results shown the total presure in that region was significant reduced. Complelte testing and opertation results will be available soon.