Author: Crisp, J.L.
Paper Title Page
TUPB093 Compact 4 kW Variable RF Power Coupler for FRIB Quarter-wave Cavities 678
  • M.P. Kelly, Z.A. Conway, M. Kedzie, S.V. Kutsaev
    ANL, Argonne, USA
  • J.L. Crisp, L.L. Harle
    FRIB, East Lansing, USA
  A new compact 4 kW power coupler has been designed and prototyped at Argonne National Laboratory in collaboration with Michigan State University. The coupler is intended for use on the β=0.085 80.5 MHz superconducting quarter-wave cavities for the FRIB driver linac and also for the planned ReA6 quarter-wave cavity cryomodule. The design has a cold RF window and a 3 cm variable bellows section. The 16 cm overall length of the RF window and bellows facilitates a simple and compact installation onto the cavity inside the clean room. A prototype have been cold tested with high power under realistic conditions at Argonne and results are presented.