Author: Kutsaev, S.V.
Paper Title Page
WEPPC035 Design and Construction of a High-Power RF Coupler for PXIE 2284
  • M.P. Kelly, Z.A. Conway, M. Kedzie, S.V. Kutsaev, P.N. Ostroumov
    ANL, Argonne, USA
  • S. Nagaitsev
    Fermilab, Batavia, USA
  A power coupler has been designed and built at Argonne National Laboratory for use with the Project X Injector Experiment (PXIE) 162.5 MHz superconducting (SC) half-wave cavities. The 50 Ω coaxial capacitive coupler will be required to operate CW with up to 10 kW of forward power under any condition for the reflected power. A key feature is a moveable copper plated stainless steel bellows which will permit up to 3 cm of axial stroke and adjustment of Qext by roughly one order of magnitude in the range of 10-5 to 10-6. The mechanical and vacuum design will include two ceramic windows, one operating at room temperature and another at 70 Kelvin. The two window design allows the portion of the coupler assembled to the SC cavity in the clean room to be compact and readily cleanable. We present other design features including thermal intercepts to provide a large margin for RF heating and a mechanical guide assembly to operate cold and under vacuum with high reliability.  
WEPPC036 Electromagnetic Design of 15 kW CW RF Input Coupler 2286
  • S.V. Kutsaev, M.P. Kelly, P.N. Ostroumov
    ANL, Argonne, USA
  Funding: This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. DE-AC02-06CH11357.
A new power coupler is under development at Argonne National Laboratory for a cw 40 MeV proton/deuteron linac for the SARAF project in Israel. This linac requires one 15 kW RF input power per superconducting cavity. Two different cavity options are still under consideration: 109 MHz quarter-waves and 176 MHz half-waves. A coaxial capacitive input coupler has been designed and analyzed for these purposes. This paper presents the results of 3D electromagnetic simulations of this coupler together with the cavities mentioned above. An analysis of multipacting in the couplers is also presented.