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Cherepenko, A.

Paper Title Page
MOCP01

 IGBT Modolator For X-Band Klystrons  

  • V. Vogel, Y.H. Chin, M. Akemoto, S. Matsumoto, S. Tokumoto,
    High Energy Accelerator Researcher Organization (KEK), Japan
  • E. Kokin, A. Volkov, A. Cherepenko
    Budker Institute of Nuclear Physics, Novosibirsk, Russia
  • V. Revkov, U. Valyaev, A. Fogel, D. Valyaev
    Branch of Institute of Nuclear Physics, Protvino, Russia
  • A. Malenkov
    Institute of High Energy Physics, Protvino, Russia

The Solid State Induction type modulator was developed at KEK for the JLC project. This modulator was design for tunnel installation. The modulator consist from two oil-filled tanks, the first is for two klystrons and the second for pulse transformer. The pulse transformer consist from 42 core made from Finmet3 material, each core is drive by voltage 3.2 kV by two IGBT plates in parallel, one of them has core reset circuits. The total number of IGBT plates is 84. Each core has one turn at primary and transformer has four turns for secondary. This modulator can drive: short up to 1.6 microsecond, high voltage up to 500 kV pulse with current up to 540 A for two X-band 75 MW klystrons. The pulse top flatness is 2%. The expected modulator efficiency is about 75%. The step one of the modulator test was done in the summer of 2005, 300 kV of output voltage and full current at 1 pps was achieved.

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