Author: Treado, T.A.
Paper Title Page
WEPPC060 A High-power 650 MHz CW Magnetron Transmitter for Intensity Frontier Superconducting Accelerators 2351
  • G.M. Kazakevich, G. Flanagan, R.P. Johnson, F. Marhauser, M.L. Neubauer
    Muons, Inc, Batavia, USA
  • B. Chase, S. Nagaitsev, R.J. Pasquinelli, V.P. Yakovlev
    Fermilab, Batavia, USA
  • T.A. Treado
    CPI, Beverley, Massachusetts, USA
  A concept of a 650 MHz CW magnetron transmitter with fast control in phase and power, based on two-stage injection-locked CW magnetrons, has been proposed to drive Superconducting Cavities (SC) for intensity-frontier accelerators. The concept is based on a theoretical model considering a magnetron as a forced oscillator and experimentally verified with a 2.5 MW pulsed magnetron. To fulfill fast control of phase and output power requirements of SC accelerators, both two-stage injection-locked CW magnetrons are combined with a 3-dB hybrid. Fast control in output power is achieved by varying the input phase of one of the magnetrons. For output power up to 250 kW we expect the output/input power ratio to be about 35 to 40 dB in CW or quasi-CW mode with long pulse duration. All magnetrons of the transmitter should be based on commercially available models to decrease the cost of the system. An experimental model using 1 kW, CW, S-band, injection-locked magnetrons with a 3-dB hybrid combiner has been developed and built for study. A description of the model, simulations, and experimental results are presented and discussed in this work.  
WEPPC001 Input Power Coupler for the IFMIF SRF Linac 2200
  • H. Jenhani, P. Bosland, P. Carbonnier, N. Grouas, P. Hardy, V.M. Hennion, F. Orsini, J. Plouin, B. Renard
    CEA/IRFU, Gif-sur-Yvette, France
  • S.J. Einarson, T.A. Treado
    CPI, Beverley, Massachusetts, USA
  The design phase of the IFMIF-EVEDA Power Couplers for the Superconductive HWR has been accomplished. TiN and copper coatings specifications have been validated on samples. A coupler window equipped with a truncated antenna and RF matching transition have been fabricated and tested to qualify the manufacturing processes and to demonstrate the technical feasibility of the coupler. Series of tests were successfully performed on these subassemblies. The last part of the design phase consists of the design validation by manufacturing two coupler prototypes and testing their performances at full power. Finishing processes and validation tests are on-going.