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Avrakhov, P. V.

Paper Title Page
MOPP132 Progress Towards Development of an L-Band SC Traveling Wave Accelerating Structure with Feedback 871
 
  • A. Kanareykin
    Euclid TechLabs, LLC, Solon, Ohio
  • P. V. Avrakhov
    LPI, Moscow
  • S. Kazakov
    KEK, Ibaraki
  • N. Solyak, V. P. Yakovlev
    Fermilab, Batavia, Illinois
 
  We describe an ongoing experimental program and progress towards development of a conceptual design for a superconducting traveling wave accelerating structure for the ILC. The accelerating gradient can be significantly improved by the use of an RF feedback system redirecting the accelerating wave that passed through the superconducting traveling wave accelerator (STWA) section back to the input of the accelerating structure. The conceptual design of the SC traveling wave accelerator has been considered by P. Avrakhov et al. [PAC07, pp.2538], where shape optimization, coupler cell design and tuning issues in the feedback loop were presented. The proposed TW structure design gives an overall 24% increase in gradient over the 1 m long standing wave structure and potentially can reach 46% if a longer structure is employed. Experimental investigation of the TW SC structure considers tests of a single cavity having the same shape as the regular cell of the full-sized STWA structure, and the same ratio of the RF fields. The details of the individual parts, joint configurations along with some developments on forming and welding of the proposed cavity shapes are discussed.