Author: Holmes, D.
Paper Title Page
WEPPC113 Progress on the High-Current 704 MHz Superconducting RF Cavity at BNL 2486
  • W. Xu, S.A. Belomestnykh, I. Ben-Zvi, H. Hahn, P. Jain
    BNL, Upton, Long Island, New York, USA
  • C.M. Astefanous, M.D. Cole, J.P. Deacutis, D. Holmes
    AES, Medford, NY, USA
  Funding: This work was supported by Sotny Brook under contract No. DE-SC0002496 and Brookhaven Science Associates, LLC under Contract No. DE-AC02-98CH10886 with the U.S. DOE.
The 704 MHz high current superconducting cavity has been designed with consideration of both performance of fundamental mode and damping of higher order modes. A copper prototype cavity was fabricated by AES and delivered to BNL. RF measurements were carried out on this prototype cavity, including fundamental pass-band and HOM spectrum measurements, HOM studies using bead-pull setup, prototyping of antenna-type HOM couplers. The measurements show that the cavity has very good damping for the higher-order modes, which was one of the main goals for the high current cavity design. 3D cavity models were simulated with Omega3P code developed by SLAC to compare with the measurements. The paper describes the cavity design, RF measurement setups for the copper prototype, and presents comparison of the experimental results with computer simulations. The progress with the niobium cavity fabrication will also be described.