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Shepard, K. W.

Paper Title Page
TUPAS005 Accelerators for the Advanced Exotic Beam Facility in the U. S. 1664
 
  • P. N. Ostroumov, J. D. Fuerst, M. P. Kelly, B. Mustapha, J. A. Nolen, K. W. Shepard
    ANL, Argonne, Illinois
  
  Funding: This work was supported by the U. S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC-02-06CH11357

The Office of Science of the Department of Energy is currently considering options for an advanced radioactive beam facility in the U. S. The U. S. facility will complement capabilities both existing and planned elsewhere. As envisioned at ANL, the facility, called the Advanced Exotic Beam Laboratory (AEBL), would consist of a heavy-ion driver linac, a post-accelerator and experimental areas. The proposed design of the AEBL driver linac is a cw, fully superconducting, 833 MV linac capable of accelerating uranium ions up to 200 MeV/u and protons to 580 MeV with 400 kW beam power. An extensive research and development effort has resolved many technical issues related to the construction of the driver linac and other systems required for AEBL. This paper presents the status of planning, some options for such a facility, as well as, progress in related R&D.

 
WEPMN087 Variable CW RF Power Coupler for 345 MHz Superconducting Cavities 2230
 
  • K. W. Shepard, Z. A. Conway, J. D. Fuerst, M. P. Kelly, G. J. Waldschmidt
    ANL, Argonne, Illinois
  • A. M. Porcellato
    INFN/LNL, Legnaro, Padova
  
  Funding: This work was supported by the U. S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC-02-06CH11357.

This paper reports the development of a 5-10 kW cw variable coupler for 345 MHz spoke-loaded superconducting (SC)cavities. The coupler inserts an 80K copper loop into a 5 cm diameter coupling port on several types of spoke-loaded cavity operating at 2 - 4K. The coupling loop can be moved during operation to vary the coupling over a range of 40 dB. The coupler is designed to facilitate high-pressure water rinsing and low-particulate clean assembly. Design details and operating characteristics are discussed.