Development of multi-purpose MW gyrotrons for fusion devices

R. Minami, T. Kariya, T. Imai, T. Numakura, Y. Endo, H. Nakabayashi, T. Eguchi, T. Shimozuma, S. Kubo, Y. Yoshimura, H. Igami, H. Takahashi, T. Mutoh, S. Ito, Hiroshi Idei, H. Zushi, Y. Yamaguchi, K. Sakamoto, Y. Mitsunaka

    Research output: Contribution to journalArticle

    10 Citations (Scopus)

    Abstract

    The latest development achievements in the University of Tsukuba of over-1 MW power level gyrotrons required in present-day fusion devices, GAMMA 10, Large Helical Device (LHD), QUEST, Heliotron J and NSTX, are presented. The obtained maximum outputs are 1.9 MW for 0.1 s on the 77 GHz LHD tube and 1.2 MW for 1 ms on the 28 GHz GAMMA 10 one, which are new records in these frequency ranges. In long-pulse operation, 0.3 MW for 40 min at 77 GHz and 0.54 MW for 2 s at 28 GHz are achieved. A new programme of 154 GHz 1 MW development has started for high-density plasma heating in LHD. On the first 154 GHz tube, 1.0 MW for 1 s is achieved. As a next activity of the 28 GHz gyrotron, an over-1.5 MW gyrotron is designed and fabricated to study the multi-MW oscillation. The possibility of 0.4 MW continuous wave and 2 MW level output in operations of a few seconds, after the improvements of output window and mode converter, is shown. Moreover, a new design study of dual-frequency gyrotron at 28 and 35 GHz has started, which indicates the practicability of the multi-purpose gyrotron.

    Original languageEnglish
    Article number063003
    JournalNuclear Fusion
    Volume53
    Issue number6
    DOIs
    Publication statusPublished - Jun 1 2013

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    cyclotron resonance devices
    fusion
    output
    tubes
    plasma heating
    continuous radiation
    converters
    frequency ranges
    oscillations
    pulses

    All Science Journal Classification (ASJC) codes

    • Nuclear and High Energy Physics
    • Condensed Matter Physics

    Cite this

    Minami, R., Kariya, T., Imai, T., Numakura, T., Endo, Y., Nakabayashi, H., ... Mitsunaka, Y. (2013). Development of multi-purpose MW gyrotrons for fusion devices. Nuclear Fusion, 53(6), [063003]. https://doi.org/10.1088/0029-5515/53/6/063003

    Development of multi-purpose MW gyrotrons for fusion devices. / Minami, R.; Kariya, T.; Imai, T.; Numakura, T.; Endo, Y.; Nakabayashi, H.; Eguchi, T.; Shimozuma, T.; Kubo, S.; Yoshimura, Y.; Igami, H.; Takahashi, H.; Mutoh, T.; Ito, S.; Idei, Hiroshi; Zushi, H.; Yamaguchi, Y.; Sakamoto, K.; Mitsunaka, Y.

    In: Nuclear Fusion, Vol. 53, No. 6, 063003, 01.06.2013.

    Research output: Contribution to journalArticle

    Minami, R, Kariya, T, Imai, T, Numakura, T, Endo, Y, Nakabayashi, H, Eguchi, T, Shimozuma, T, Kubo, S, Yoshimura, Y, Igami, H, Takahashi, H, Mutoh, T, Ito, S, Idei, H, Zushi, H, Yamaguchi, Y, Sakamoto, K & Mitsunaka, Y 2013, 'Development of multi-purpose MW gyrotrons for fusion devices', Nuclear Fusion, vol. 53, no. 6, 063003. https://doi.org/10.1088/0029-5515/53/6/063003
    Minami R, Kariya T, Imai T, Numakura T, Endo Y, Nakabayashi H et al. Development of multi-purpose MW gyrotrons for fusion devices. Nuclear Fusion. 2013 Jun 1;53(6). 063003. https://doi.org/10.1088/0029-5515/53/6/063003
    Minami, R. ; Kariya, T. ; Imai, T. ; Numakura, T. ; Endo, Y. ; Nakabayashi, H. ; Eguchi, T. ; Shimozuma, T. ; Kubo, S. ; Yoshimura, Y. ; Igami, H. ; Takahashi, H. ; Mutoh, T. ; Ito, S. ; Idei, Hiroshi ; Zushi, H. ; Yamaguchi, Y. ; Sakamoto, K. ; Mitsunaka, Y. / Development of multi-purpose MW gyrotrons for fusion devices. In: Nuclear Fusion. 2013 ; Vol. 53, No. 6.
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