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Kazakov, S.Y.

Paper Title Page
THP45 The Toshiba E3736 Multi Beam Klystron 706
  • A. Yano, S. Miyake
    TETD, Saitama
  • Y.H. Chin
    KEK, Ibaraki
  • S.Y. Kazakov
    IHEP Protvino, Protvino, Moscow Region
  • A.V. Larionov, V.E. Teryaev
    BINP SB RAS, Protvino, Moscow Region
  A 10 MW, L-band multi beam klystron (MBK) for TESLA linear collider and TESLA XFEL has been under development at Toshiba Electron Tubes & Devices Co., Ltd. (TETD) in collaboration with KEK. The TESLA requires pulsed klystrons capable of 10 MW output power at 1300 MHz with 1.5 ms pulse length and a repetition rate of 10 pps. The MBK with 6 low-perveance beams in parallel in the klystron enables us to operate at lower cathode voltage with higher efficiency. The design work has been accomplished and the fabrication is under way. We are going to start conditioning and testing of prototype #0 in the beginning of June 2004. The design overview and the initial test results at the factory will be presented.  
THP60 High-Power RF Distribution System for the 8-Pack Project 751
  • C.D. Nantista
    SLAC/ARDB, Menlo Park, California
  • D.P. Atkinson
    LLNL, Livermore
  • J.Q. Chan
    SLAC/NLC, Menlo Park, California
  • S.Y. Kazakov
    KEK, Ibaraki
  • D.C. Schultz
    SLAC, Menlo Park, California
  • S.G. Tantawi
    SLAC/ARDA, Menlo Park, California
  The 8-Pack Project at SLAC is a prototype rf system whose goal is to demonstrate the high-power X-band technology developed in the NLC/GLC program. In its first phase, it has reliably produced a 400 ns rf pulse of over 500 MW using a solid-state modulator, four 11.424 GHz klystrons and a dual-moded SLED-II pulse compressor [1]. In Phase 2, the output power of our system has been delivered into the bunker of the NLCTA (Next Linear Collider Test Accelerator) and divided between several accelerating structures, first four and finally eight, for beam acceleration. We describe here the design, cold-test measurements, and processing of this power distribution system. Due to the high power levels and the need for efficiency, overmoded waveguide and components are used. For power transport, the TE 01 mode is used in 7.44 cm and 4.064 cm diameter circular waveguide. Only near the structures is standard WR90 rectangular waveguide employed. Components used to manipulate the rf power include transitional tapers, mode converters, overmoded bends, fractional directional couplers, and hybrids.

[1] S. Tantawi, et al., “Status of High-Power Tests of the Dual-Mode SLED-II System for an X-Band Linear Collider,” FR202, these proceedings.