Study of high power terahertz gyrotorn and its oscillatio dynamics

• Project/Area Number: 25249135
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: National Institutes for Quantum and Radiological Science and Technology (2015-2017); Japan Atomic Energy Agency (2013-2014)
• Principal Investigator: Sakamoto Keishi 国立研究開発法人量子科学技術研究開発機構, 六ヶ所核融合研究所 核融合炉材料研究開発部, 部長(定常) (90343904)
• Co-Investigator(Kenkyū-buntansha): 小林 貴之 国立研究開発法人量子科学技術研究開発機構, 那珂核融合研究所 ITERプロジェクト部, 研究員(定常) (10465974) ; 假家 強 筑波大学, 数理物質系, 准教授 (30451678) ; 小田 靖久 国立研究開発法人量子科学技術研究開発機構, 那珂核融合研究所 ITERプロジェクト部, 研究員(定常) (60512209) ; 高橋 幸司 国立研究開発法人量子科学技術研究開発機構, 那珂核融合研究所 ITERプロジェクト部, 上席研究員(定常) (70354644) ; 南 龍太郎 筑波大学, 数理物質系, 准教授 (70370476) ; 今井 剛 筑波大学, 数理物質系(名誉教授), 名誉教授 (80354637) ; 梶原 健 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, 研究員 (90450311)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥44,980,000 (Direct Cost: ¥34,600,000、Indirect Cost: ¥10,380,000); Fiscal Year 2016: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2015: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000); Fiscal Year 2014: ¥16,770,000 (Direct Cost: ¥12,900,000、Indirect Cost: ¥3,870,000); Fiscal Year 2013: ¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
• Keywords: ジャイロトロン / テラヘルツ波 / 大電力 / 核融合 / 電子サイクロトロン / プラズマ加熱電流駆動 / テラヘルツジャイロトロン / 300GHz / TE32,18モード / テラヘルツ / 発振ダイナミクス / 500kW / モード競合 / 単一モード発振

Outline of Final Research Achievements

Research and development of a 0.2 - 0.3 terahertz band gyrotron for plasma heating current driving of a nuclear fusion reactor was carried out. At the frequency of 0.3 terahertz, oscillation characteristic experiments were performed with the aim of stable oscillation at the TE 32,18 mode in a cylindrical resonator which is an unprecedented level higher order mode so far, and an output 0.62 megawatt exceeding the target 0.5 megawatt was achieved. Furthermore, by scanning the magnetic field of the cavity resonator, step tunable oscillation of 0.3 megawatt level from 0.226 terahertz to 0.254 terahertz was demonstrated..

Research Products

• [Journal Article] Development of over-MW gyrotrons for fusion at 14 GHz to sub-THz frequencies (2017)
  • Author(s): T. Kariya, T. Imai, R. Minami, K. Sakamoto, Y. Oda, R. Ikeda, T. Shimozuma, S. Kubo, H. Idei, T. Numakura, K. Tsumura, Y. Ebashi, M. Okada, Y. Nakashima, Y. Yoshimura, H. Takahashi, S. Ito, K. Hanada, K. Nagasaki, M. Ono, T. Eguchi, Y. Mitsunaka
  • Journal Title: Nuclear Fusion Volume: 57 Issue: 6 Pages: 066001-066001
  • DOI: 10.1088/1741-4326/aa6875
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Development of gyrotrons for fusion with power exceeding 1 MW over at wide frequency range (2015)
  • Author(s): T. Kariya, T. Imai, R. Minami, T. Numakura, T. Eguchi, T. Kato, Y. Endo, M. Ichimura, T. Shimozuma, S. Kubo, H. Takahashi, Y. Yoshimura, H. Igami, S. Ito, T. Mutoh, K. Sakamoto, H. Idei, H. Zushi, K. Nagasaki, F. Sano, M. Ono, Y. Mitsunaka
  • Journal Title: Nucl. Fusion Volume: 55 Pages: 093009-093009
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Study of High Power and High Frequency Gyrotron for FusionReactor (2017)
  • Author(s): Keishi Sakamoto, Ryosuke Ikeda, Tsuyoshi Kariya, Yasuhisa Oda, Takayuki Kobayashi, Ken Kajiwara, Kazuo Hayashi, Ryutaro Minami, Koji Takahashi, Tsuyoshi Imai, Shinichi Moriyama
  • Organizer: 42th Int.Conf.on Infrared, Millimeter and Terahertz Waves
  • Int'l Joint Research / Invited
• [Presentation] Status of collaborative Research of Gyrotron Development at University of Tsukuba (2017)
  • Author(s): T. Kariya, R. Minami, T. Imai, T. Numakura, Y. Ebashi, T. Shimozuma, S. Kubo, K. Sakamoto, H. Idei, K. Hanada, T. Eguchi, Y. Mitsunaka, Y. Nakashima
  • Organizer: Plasma Conference 2017
  • Int'l Joint Research
• [Presentation] ＤＥＭＯ炉用３００ＧＨｚジャイロトロンの開発 (2015)
  • Author(s): (3)假家強, 小田靖久, 南龍太郎, 津村康平, 池田亮介, 梶原健, 高橋幸司, 林一生, 今井剛, 坂本慶司
  • Organizer: 第32回プラズマ・核融合学会 年会
  • Place of Presentation: 名古屋大学東山キャンパス
  • Year and Date: 2015-11-24
• [Presentation] Progress of 300 GHz high order mode gyrotron development (2015)
  • Author(s): (1)Yasuhisa Oda, Tsuyoshi Kariya, Ryutaro Minami, Ryosuke Ikeda, Ken Kajiwara, Koji Takahashi, Kazuo Hayashi, Tsuyoshi Imai, Keishi Sakamoto
  • Organizer: 40th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2015) (Hong Kong, 23 - 28 August 2015) TS-68
  • Place of Presentation: 香港
  • Year and Date: 2015-08-23
  • Int'l Joint Research
• [Presentation] Study of Sub-Terahertz high power gyrotron for ECH&CD system of DEMO (2015)
  • Author(s): Keishi Sakamoto, Tsuyoshi Kariya, Yasuhisa Oda, Ryutaro Minami, Ryosuke Ikeda, Ken Kajiwara, Takayuki Kobayashi, Koji Takahashi, Shinichi Moriyama, Tsuyoshi Imai
  • Organizer: 2015 IEEE International Conference on Plasma Science
  • Place of Presentation: Turkey, Antalya
  • Year and Date: 2015-05-27
• [Presentation] Study of Sub-Terahertz high power gyrotron for ECH&CD system of DEMO (2014)
  • Author(s): Keishi Sakamoto, Tsuyoshi Kariya, Yasuhisa Oda, Ryutaro Minami, Ryosuke Ikeda, Ken Kajiwara, Takayuki Kobayashi, Koji Takahashi, Shinichi Moriyama, Tsuyoshi Imai
  • Organizer: Plasma Conference 2014
  • Place of Presentation: 新潟
  • Year and Date: 2014-11-21
• [Presentation] Preliminary result of 300GHz short pulse high order mode gyrotron (2014)
  • Author(s): Keishi Sakamoto, Yasuhisa Oda, Tsuyoshi Kariya, Ryutaro Minami, Ryosuke Ikeda, Ken Kajiwara, Koji Takahashi, Kazuo Hayashi, Tsuyoshi Imai
  • Organizer: 39th International Conference on Infrared, Millimeter wave, and Terahertz waves
  • Place of Presentation: Tuson, USA
  • Year and Date: 2014-09-17