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| WEPMA139 |
Development of High-power Microwave Devices in Toshiba
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511 |
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- K. Hayashi, M. Irikura, Y. Okubo, H. Urakata
TETD, Otawara
- M. Y. Miyake
Toshiba, Yokohama
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Vacuum microwave devices continue to be essential for high-power RF accelerator systems and plasma heating or current drive systems for fusion experimental devices. Klystrons are suitable for use in amplification at the frequency ranges from 300 MHz to X band, while gyrotrons are mainly utilized in the millimeter wave range. Input couplers also play an important role in the building of acceleration cavity systems. TETD (Toshiba Electron Tubes & Devices Co., LTD.) has been developing these vacuum microwave devices in collaboration with some Japanese research institutes. Two kinds of long-pulse klystron for the J-PARC project were developed in collaboration with KEK and JAEA, which each have their operation frequencies, 324 MHz and 972 MHz. Both tubes output 3 MW with the pulse duration of 0.62 ms at the repetition frequency of 50 pps. They have a triode-type electron gun and same beam parameters and operate with an anode-modulating mode to reduce the cost of the power supply system.
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