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2007 Fiscal Year Final Research Report Summary

Studies of high power oscillation source with frequency tunability in the millimeter and sub-millimeter waves

Research Project

Project/Area Number 18560042
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied optics/Quantum optical engineering
Research InstitutionJapan Atomic Energy Agency

Principal Investigator

ATSUSHI Kasugai  Japan Atomic Energy Agency, Fusion Research and Development Directorate, Assistant Principal Researcher (70354636)

Co-Investigator(Kenkyū-buntansha) SAKAMOTO Keishi  Japan Atomic Energy Agency, Fusion Research and Development Directorate, 研究主席 (90343904)
Project Period (FY) 2006 – 2007
KeywordsPlasma, Fusion / Electron device / Terahertz / millimeter wave / Gvrotron
Research Abstract

The output power and pulse duration of previous gyrotron for fusion reactor were 0.5MW and 100s or 0.2MWand 550s in the frequency range of 0.17 THz, respectively. However, a continuous-wave gyrotron is required for academic research and industrial application even if some output power decreased. For this purpose, suppression of outgases due to overheating inside the gyrotron and instabilities, which limit the pulse duration of the gyrotron, is indispensable.
In this study, the parameters of the 0.17T gyrotron for fusion research, which is modified in a mode converter, an electron gun and control circuit, are optimized in the oscillation experiment in 2006. As a result, demonstration of 0.6MW output power, 46% efficiency and 1 hour (3600s) operation were carried out because the vacuum pressure in the gyrotron was stabilized in the low level of l×10-8 torr in the long pulse operation.
Furthermore, the demonstrations of 1MW-800s-55% and 0.8MW-2000s-57% were successful and high power, high efficiency and steady state operation were also accomplished. This result shows the high reliability of the gyrotron because total output energy exceed more than 150GJ.
High-speed sweep experiment of magnetic field of 7T-SCM for gyrotron oscillation was also carried out as a start-up of frequency tenability of the gyrotron. The sweep rate of 02T/5s was checked. As a result, the preparation of the experiment for the fast frequency tunability has been accomplished and an outlook for research to high frequency and tunability gyrotron has been also obtained.

  • Research Products

    (36 results)

All 2008 2007 2006

All Journal Article (20 results) (of which Peer Reviewed: 3 results) Presentation (16 results)

  • [Journal Article] Steady-State Operation of 170GHz-1MW Gyrotron for ITER2008

    • Author(s)
      A. Kasugai, et. al.
    • Journal Title

      Nuclear Fusion Vol.48

      Pages: 054009

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Steady-State Operation of 170GHz_1 MW Gyrotron for ITER2008

    • Author(s)
      A. Kasugai, K. Sakamoto, K. Takahashi, K. Kajiwara, N. Kobayashi
    • Journal Title

      Nuclear Fusion 5, Vol.48

      Pages: 054009

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Achievement of robust high-efficiency 1 MW oscillation in the hard-self-excitation region by 170 GHz continuous-wave gyrotron2007

    • Author(s)
      K. Sakamoto, et. al.
    • Journal Title

      Nature Physics Vol.3

      Pages: 411-414

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] High power and high efficiency operation of 170GHz gyrotron2007

    • Author(s)
      A. Kasugai, et. al.
    • Journal Title

      Transaction of Fusion Science and Technology Vol.51

      Pages: 213-216

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] ITER用ミリ波源ジャイロトロンの現状と核融合炉へ向けた展望2007

    • Author(s)
      春日井 敦, 他
    • Journal Title

      平成19年電気学会全国大会講演論文集[7]エネルギー変換・輸送 Vol.7

      Pages: 7-S9-8

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Demonstration of Steady State Operation with 1MW of 170GHz Gyrotron for ITER2007

    • Author(s)
      A. Kasugai, et. al.
    • Journal Title

      17th Topical Conference of Radio Frequency Power in Plasma, Vol.933

      Pages: 405-412

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Steady State Operation of High Power Gyrotron for ITER2007

    • Author(s)
      A. Kasugai, et. al.
    • Journal Title

      Proceedings of 8th IEEE Vacuum Electronics Conference, 07EX1526

      Pages: 37-40

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Achievement of robust high-efficiency 1MW oscillation in the hard-self-excitation region by a 170GHz continuous-wave gyrotron2007

    • Author(s)
      K. Sakamoto, A, Kasugai, K. Takahashi, R. Minami, N. Kobayashi, K. Kajiwara
    • Journal Title

      Nature Physics Vol.3

      Pages: 411

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] High power and bigh efficiency operation of 170GHz gyrotron2007

    • Author(s)
      A. Kasugai, R. Minami, K. Takahashi, N. Kobayashi, T. Kariya, Y. Mitsunaka, K. Sakamoto
    • Journal Title

      IEEE Transaction of Fusion Science and Technology 51, 2T

      Pages: 213

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Demonstration of Steady State Operation with 1MW of 170GHz gyrotron for ITER2007

    • Author(s)
      A. Kasugai, K. Takahashi, K. Kajiwara, N. Kobayashi, K. Sakamoto
    • Journal Title

      17th Topical Conference of Radio Frequency Power in Plasma Clearewater, Florida, USA

      Pages: 405-412

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Steady State Operation of High Power Gyrotron for ITER2007

    • Author(s)
      A. Kazugai, K. Kajiwara, K. Takahashi, N. Kobayashi, T. Kariya, Y. Mitsunaka, K. Sakamoto
    • Journal Title

      Proceedings of 8th IEEE Vacuum Electronics Conference, Kitakyushu, Japan

      Pages: 37

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Demonstration of High Efficiency 1MW Oscillation by 170GHz CW Gyrotron2007

    • Author(s)
      K. Sakamoto, A. Kasugi, K. Kajiwara, K. Takahashi, N. Kobayashi
    • Journal Title

      Proceedings of the joint 32nd International Conference on Infrared and Millimeter Waves and 15th International Conference on Terabertz Electronics, Sept., Gardiff, UK.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Present Status of Gyrotron Development for ITER, Prospect of Advanced Gyrotron for Fusion Reactor2007

    • Author(s)
      A. Kasugai, K. Takahashi, K. kajiwara, N. Kobayashi, K. Sakamoto
    • Journal Title

      IEEJ Technical Report

      Pages: 7-S9-8

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] ITER用170GHzジャイロトロンの高出力・長パルス・高効率動作2006

    • Author(s)
      春日井 敦, 他
    • Journal Title

      電子情報通信学会技術研究報告 Vol.106

      Pages: 77-82

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Development of the 170GHz gyrotron and equatorial launcher for ITER2006

    • Author(s)
      K. Sakamoto, et. al.
    • Journal Title

      Proceedings of 21st IAEA Conference(Fusion Energy 2006), IAEA-CN-149

      Pages: IT/2-4Rc

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Development of High Power and Long Pulse 170GHz Gyrotron2006

    • Author(s)
      K. Sakamoto, et. al.
    • Journal Title

      Proceedings of the 14th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron, Resonance Heating

      Pages: 3517-425

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Development of 170GHz Gyrotron for ITER2006

    • Author(s)
      A. Kasugai, et. al.
    • Journal Title

      Proceedings of Joint Workshop of 31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics,

      Pages: 202

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Development of 170GHz Gyrotron for ITER2006

    • Author(s)
      A. Kasugai, K. Takahashi, N. Kobayashi, K. Sakamoto
    • Journal Title

      Conference Digest of Joint Workshop of 31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics, September 18-22, Shanghai, China.

      Pages: 202

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Development of the 170GHz Gyrotron and Equatorial Launcher for ITER2006

    • Author(s)
      K. Sakamoto, A. Kasugai, K. Takahashi, R. Minami, T. Kariya, Y. Mitsunaka, N. Kobayashi
    • Journal Title

      Proceedings of 21st IAEA Fusion Energy Conference Chengdu, China.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] operation with high power, long pulse and high efficiency of 170GHz gyrotron for ITER2006

    • Author(s)
      A. Kasugai, K. Takahashi, N. Kobayashi, T. Karuya, Y. Mitsunaka, K. Sakamoto
    • Journal Title

      IEICE Technical Report 200, Vol.106

      Pages: 77

    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] ITER用1MW連続出力ジャイロトロンの開発2007

    • Author(s)
      春日井 敦, 他
    • Organizer
      第24回プラズマ・核融合学会年会
    • Place of Presentation
      日本、姫路市
    • Year and Date
      20071100
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Demonstration of High Efficiency 1MW Oscillation by 170GHz CW Gyrotron2007

    • Author(s)
      K. Sakamoto, et. al.
    • Organizer
      32nd International Conference on Infrared and Millimeter Waves and 15th International Conference on Terahertz Electronics
    • Place of Presentation
      英国、カーディフ
    • Year and Date
      20070900
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Demonstration of High Efficiency 1MW Oscillation by 170GHz CW Gyrotron2007

    • Author(s)
      K. Sakamoto, A Kasugai, K. Kajiwara, K. Takahashi, N. Kobayashi
    • Organizer
      joint 32nd International Conference on Infrared and Millimeter waves and 15th International Conference on Terahertz Electronics
    • Place of Presentation
      Cardiff, UK.
    • Year and Date
      20070900
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Steady State Operation of High Power Gyrotron for ITER2007

    • Author(s)
      A. Kasugai, K. Kajiwara, K. Takahashi, N. Kobayashi, T. Kariya, Y. Mitsunaka, K. Sakamoto
    • Organizer
      8th IEEE Vacuum Electronics Conference
    • Place of Presentation
      Kitakyushi, Japan
    • Year and Date
      20070515-17
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Demonstration of Steady State Operaation with 1MW of 170GHz gyrotron for ITER2007

    • Author(s)
      A. Kasugai, K. Takahashi, K. Kajiwara, N. Kobayashi, K. Sakamoto
    • Organizer
      17th Topical Conference of Radio Frequency Power in Plasma
    • Place of Presentation
      Clearewater, Frolida, USA
    • Year and Date
      20070507-10
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Demonstration of Steady State Operation with 1MW of 170GHz Gyrotron for ITER2007

    • Author(s)
      A. Kasugai, et. al.
    • Organizer
      17th Topical Conference of Radio Frequency Power in Plasma,
    • Place of Presentation
      米国、フロリダ州
    • Year and Date
      20070500
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Steady State Operation of High Power Gyrotron for ITER2007

    • Author(s)
      A. Kasugai, et. al.
    • Organizer
      Proceedings of 8th IEEE Vacuum Electronics Conference
    • Place of Presentation
      日本、北九州市
    • Year and Date
      20070500
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] ITER用ミリ波源ジャイロトロンの現状と核融合炉へ向けた展望2007

    • Author(s)
      春日井 敦, 他
    • Organizer
      電気学会年会
    • Place of Presentation
      日本、富山市
    • Year and Date
      20070300
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Evelopment of 1MW-CW gyrotron for ITER2007

    • Author(s)
      A. Kasugai, K. Sakamoto, K. Takahashi, K. Kajiwara, Y. Ikkeda, S. Komori, N. Kobatyashi, T. Kariya, R. Minami, Y. Mitsunaka
    • Organizer
      24thJSPF Annual Meeting
    • Place of Presentation
      Himeji
    • Year and Date
      2007-11-28
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Present Status of Gyrotron Development for ITER and Prospect of Advanced Gyrotron for Fusion Reactor2007

    • Author(s)
      A. Kasugai, K. Takahashi, K. Kajiwara, N. Kobayashi, K. Sakamoto
    • Organizer
      IEEJ
    • Place of Presentation
      Toyama, Japan
    • Year and Date
      2007-03-10
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Steady State Operation of 170GHz Gyrotron for ITER2006

    • Author(s)
      A. Kasugai, K. Takahashi, N. Kobayashi, K. Sakamoto
    • Organizer
      23th JSPF Annual Meeting
    • Place of Presentation
      Tsukuba
    • Year and Date
      20061128-1201
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] ITER用170GHzジャイロトロンの定常動作2006

    • Author(s)
      春日井 敦, 他
    • Organizer
      第23回プラズマ・核融合学会年会
    • Place of Presentation
      日本、つくば
    • Year and Date
      20061100
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Development of the 170GHz Gyrotron and Equatorial Launcher for ITER2006

    • Author(s)
      K. Sakamoto, A. Kasugai, K. Takahashi, R. Minami, T. Kariya, Y. Mitsunaka, N. Kobayashi
    • Organizer
      21th IAEA Fusion Energy Conference
    • Place of Presentation
      Chengdu, China
    • Year and Date
      20061010-17
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Development of the 170GHz Gyrotron and Equatorial Launcher for ITER,2006

    • Author(s)
      K. Sakamoto, et. al.
    • Organizer
      21th IAEA Fusion Energy Conference,
    • Place of Presentation
      中国、成都
    • Year and Date
      20061000
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Development of 170GHz Gyrotron for ITER2006

    • Author(s)
      A. Kasugai, K. Takahashi, N. Kobayashi, K. Sakamoto
    • Organizer
      Joint Worshop of 31st International Conference on Infrared and Milimeter Waves and 14th International Conference on Terahertz Electronics
    • Place of Presentation
      Shanghai, China
    • Year and Date
      20060918-22
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Development of 170GHz Gyrotron for ITER2006

    • Author(s)
      A. Kasugai, et. al.
    • Organizer
      31st International Conference on Infrared and Millimeter Waves and 14th International Conference on Terahertz Electronics
    • Place of Presentation
      中国、上海
    • Year and Date
      20060900
    • Description
      「研究成果報告書概要(和文)」より

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Published: 2010-02-04  

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