Mode convertor and built-in mirror for multi frequency high power and long pulse gyrotron

• Project/Area Number: 24561034
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: Japan Atomic Energy Agency
• Principal Investigator: Kajiwara Ken 国立研究開発法人日本原子力研究開発機構, 核融合研究開発部門・企画調整室, 研究主幹 (90450311)
• Co-Investigator(Kenkyū-buntansha): ODA YASUIHSA 国立研究開発法人日本原子力研究開発機構, 核融合研究開発部門・那珂核融合研究所, 研究副主幹 (60512209) ; TAKAHASHI KOJI 国立研究開発法人日本原子力研究開発機構, 核融合研究開発部門・那珂核融合研究所, 研究主幹 (70354644) ; KEISHI SAKAMOTO 国立研究開発法人日本原子力研究開発機構, 核融合研究開発部門・六ヶ所核融合研究所, 部長 (90343904)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000); Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: ジャイロトロン / 電子サイクロトロン加熱 / マルチ周波数

Outline of Final Research Achievements

One of the effective way of heating the fusion plasma is the injection of the high frequency electromagnetic wave (so called millimeter wave which the wavelength is millimeter range). Such a high power millimeter wave can be generated by the gyrotron. This study is the development of the mode convertor and built-in mirrors for the gyrotron. The gyrotron is usually designed for single frequency generation, but if the gyrotron can generate the alternative frequency, it can expand the range of heating position (the heating position depends on the frequency). The development of these components were successfully finished.

Research Products

• [Journal Article] High-power and long-pulse operation of TE31,11 mode gyrotron (2015)
  • Author(s): R. Ikeda, K.Kajiwara, Y.Oda, K.Takahashi, K.Sakamoto
  • Journal Title: Fusion Engineering and Design Volume: 96-97 Pages: 482-487
  • Peer Reviewed
• [Journal Article] High efficiency coupling of radio frequency beams from the dual frequency gyrotron with a corrugated waveguide transmission system (2013)
  • Author(s): 小田靖久、梶原 健、高橋幸司、満仲義加、坂本慶司
  • Journal Title: Review of Scientific Instruments Volume: 84 Issue: 1
  • DOI: 10.1063/1.4772572
  • Peer Reviewed
• [Presentation] Development of high power gyrotrons and Mm-wave launcher For ITER (2015)
  • Author(s): K. Takahashi , Y. Oda, T. Kobayashi, R. Ikeda, G. Abe, M. Isozaki, H. Shidara, S. Moriyama, K. Kajiwara, K. Sakamoto
  • Organizer: 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz)
  • Place of Presentation: Hong Kong (China)
  • Year and Date: 2015-08-23
  • Int'l Joint Research
• [Presentation] Status of high power gyrotron development in JAEA (2015)
  • Author(s): K.Sakamoto, R. Ikeda, Y.Oda, T.Kobayashi, K.Kajiwara, H.Shidara, K.Takahashi, S. Moriyama
  • Organizer: 16th International Vacuum Electronics Conference (IVEC 2015)
  • Place of Presentation: Beijing (China)
  • Year and Date: 2015-04-27
  • Int'l Joint Research
• [Presentation] Experiments of High - Power Multi - Frequency Gyrotron and Long Distance Transmission (2014)
  • Author(s): 池田亮介、梶原健、小田靖久、高橋幸司、坂本慶司
  • Organizer: 28th Symposium on Fusion Technology
  • Place of Presentation: サン・セバスティアン(スペイン)
  • Year and Date: 2014-09-29 – 2014-10-03
• [Presentation] Progress of Development for 170GHz Gyrotron and 5kHz Modulation Power Supply for ITER (2013)
  • Author(s): 梶原 健、小田靖久、池田亮介、高橋幸司、坂本慶司
  • Organizer: 20th Topical Conference on Radio Frequency Power in Plasmas
  • Place of Presentation: ソレント（イタリア）
• [Presentation] Status of high power gyrotron development in JAEA (2013)
  • Author(s): 坂本慶司、梶原 健、小田靖久、林一生、高橋幸司
  • Organizer: IEEE 14th International Vacuum Electronics Conference (IVEC)
  • Place of Presentation: パリ（フランス）
• [Presentation] Progress of High Power Long Pulse Gyrotron for Fusion Application (2013)
  • Author(s): 坂本慶司、梶原 健、小田靖久、林一生、池田亮介
  • Organizer: 38th International Conference on Infrared, Millimeter, and Terahertz
  • Place of Presentation: マインツ（ドイツ）
• [Presentation] Progress of high power long pulse gyrotron development in JAEA (2012)
  • Author(s): 坂本 慶司、梶原 健、小田 靖久、林 一生、高橋 幸司
  • Organizer: 39th European Physical Society Conference on Plasma Physics
  • Place of Presentation: ストックホルム（スウェーデン）
• [Presentation] A Study of High Efficient Beam Coupling of High Power Gyrotron and Transmission Line (2012)
  • Author(s): 小田 靖久、梶原 健、高橋 幸司、坂本 慶司
  • Organizer: The 37th International Conference on Infrared, Milimeter and Terahertz Waves (IRMMW-THz)
  • Place of Presentation: ウロンゴン（オーストラリア）
• [Presentation] Progress on the Development of High Power Long Pulse Gyrotron and Related Technologies (2012)
  • Author(s): 梶原 健、坂本 慶司、小田靖久、林 一生、高橋 幸司、春日井 敦
  • Organizer: 24th IAEA Fusion Energy Conference (FEC 2012)
  • Place of Presentation: サンディエゴ（アメリカ）