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Cheng, G.

Paper Title Page
TPPT051 High Power Coupler for the TESLA Superstructure Cavities 3141
 
  • Q.S. Shu, G. Cheng, J. T. Susta
    AMAC, Newport News, Virginia
  • S.J. Einarson
    CPI/BMD, Beverley, Massachusetts
  • T. Garvey
    LAL, Orsay
  • W.-D. Müller, D. Proch
    DESY, Hamburg
  • T.A. Treado
    CPI, Beverley, Massachusetts
 
  Funding: U.S. Department of Energy Grant No. DE-FG02-00ER86102.

More and more accelerators are built with superconducting cavities operating at cryogenic temperatures, and the probability of a ceramic window failure presents increasing problems because of the resulting contamination of the cavities surfaces and the resulting accelerating electric field degradation. A cost effective design and fabrication method for the TESLA cavities has been developed in the framework of a DOE STTR grant. This new design replaces the present TESLA cylindrical ceramic windows with two planar disc windows separated by a vacuum space and is optimized for RF input power, vacuum characteristics, and thermal properties. This novel coupler will reduce the costs of fabrication and improve the RF performance of the coupler, the vacuum between the two windows, and the cleaning procedure. Two couplers with this design have been fabricated and are presently being conditioned for testing at DESY, Germany, and LAL, France, on the RF high power testing stand and on a test cryomodule.