Direct measurement of ions in a high-density plasma with collective Thomson scattering diagnostics

• Project/Area Number: 17H03509
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: University of Fukui
• Principal Investigator: Saito Teruo 福井大学, 遠赤外領域開発研究センター, 特命教授 (80143163)
• Co-Investigator(Kenkyū-buntansha): 立松 芳典 福井大学, 遠赤外領域開発研究センター, 教授 (50261756) ; 久保 伸 核融合科学研究所, ヘリカル研究部, 教授 (80170025) ; 田中 謙治 核融合科学研究所, ヘリカル研究部, 教授 (50260047) ; 西浦 正樹 核融合科学研究所, ヘリカル研究部, 准教授 (60360616)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000); Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000); Fiscal Year 2018: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000); Fiscal Year 2017: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
• Keywords: プラズマ計測 / 協同トムソン散乱 / サブテラヘルツ帯ジャイロトロン

Outline of Final Research Achievements

Collective Thomson scattering experiment was carried out on LHD with a 303 GHz high power gyrotron that was developed through collaboration between University of Fukui and National Institute for Fusion Science. Transmission characteristics of the 303 GHz power through existing corrugated waveguides for electron heating with different frequencies were measured and analyzed. Definite scattering signal has not been obtained yet.
Two papers were published for (i) realization of single mode oscillation of a high power sub THz gyrotron during the full pulse width and physics interpretation with mode competition calculation, and (ii) observation of a multi-peak frequency spectrum for a mode different from the design mode and a theoretical explanation as mode competition with a wave reflected from the vacuum window.

Academic Significance and Societal Importance of the Research Achievements

協同トムソン散乱計測は核融合を目指す高温プラズマ中のイオン温度の計測法として有望である。本研究では、高密度プラズマにも適用可能なサブテラヘルツ帯周波数のジャイロトロンを用いて、核融合科学研究所の実験装置LHDにおいて協同トムソン散乱計測を行った。サブテラヘルツ帯協同トムソン散乱計測実現に向けた第一歩である。
また、高出力サブテラヘルツ帯ジャイロトロンにおける単独発振の実現や、反射波が存在する場合の多周波数発振現象の発見および反射波を取り入れたモード間相互作用としての理論的説明など、ジャイロトロン研究の学術的成果を得た。

Research Products

• [Int'l Joint Research] Saratov State University/Saratov Branch, Inst. Rad Eng. Elec RAS(ロシア連邦)
• [Int'l Joint Research] Saratov State University(ロシア連邦)
• [Journal Article] Collective Thomson scattering with 77, 154, and 300 GHz sources in LHD (2020)
  • Author(s): Nishiura M.、Tanaka K.、Kubo S.、Saito T.、Kenmochi N.、Nuga H.、Seki R.、Shimozuma T.、Yoshimura Y.、Igami H.、Takahashi H.、Tsujimura T.I.、Yanai R.、Tatematsu Y.
  • Journal Title: Journal of Instrumentation Volume: 15
  • DOI: 10.1088/1748-0221/15/01/c01002
  • NAID: 120007180034
  • Peer Reviewed
• [Journal Article] Effect of Reflection on Mode Competition and Multi-Frequency Oscillation in a High-Power Sub-THz Gyrotron: Experimental Observation and Theoretical Analysis (2020)
  • Author(s): Teruo Saito, Maria M. Melnikova, Nikita M. Ryskin, Shunsuke Tanaka, Ryuji Shinbayashi, Yuusuke Yamaguch, Masafumi Fukunari, Yoshinori Tatematsu
  • Journal Title: Journal of Infrared, Millimeter, and Terahertz Waves Volume: 41
  • DOI: 10.1007/s10762-020-00695-1
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Oscillation Characteristics of a High Power 300 GHz Band Pulsed Gyrotron for Use in Collective Thomson Scattering Diagnostics (2019)
  • Author(s): T. Saito, S. Tanaka, R. Shinbayashi, Y. Tatematsu, Y. Yamaguchi, M. Fukunari, S. Kubo, T. Shimozuma, K. Tanaka and M. Nishiura
  • Journal Title: Plasma and Fusion Research Volume: 14 Issue: 0 Pages: 1406104-1406104
  • DOI: 10.1585/pfr.14.1406104
  • NAID: 130007672322
  • ISSN: 1880-6821
  • Peer Reviewed / Open Access
• [Journal Article] Developments for collective Thomson scattering equipment with a sub-THz gyrotron in LHD (2019)
  • Author(s): Saito Teruo、Tatematsu Yoshinori、Yamaguchi Yuusuke、Fukunari Masafumi、Hirobe Takumi、Shinbayashi Ryushi、Tanaka Shunsuke、Ohkubo Kunizo、Kubo Shin、Shimozuma Takashi、Tanaka Kenji、Nishiura Masaki
  • Journal Title: EPJ Web of Conferences Volume: 203 Pages: 03012-03012
  • DOI: 10.1051/epjconf/201920303012
  • Peer Reviewed / Open Access
• [Journal Article] Subterahertz Wireless Power Transmission Using 303-GHz Rectenna and 300-kW-Class Gyrotron (2018)
  • Author(s): Mizojiri Sei、Shimamura Kohei、Fukunari Masafumi、Minakawa Shunsuke、Yokota Shigeru、Yamaguchi Yuusuke、Tatematsu Yoshinori、Saito Teruo
  • Journal Title: IEEE Microwave and Wireless Components Letters Volume: 28 Pages: 834-836
  • DOI: 10.1109/lmwc.2018.2860248
  • Peer Reviewed
• [Journal Article] 154 GHz collective Thomson scattering in LHD (2018)
  • Author(s): K. Tanaka, M. Nishiura, S. Kubo, T. Shimozuma, T. Saito, D. Moseev and I. Abramovic
  • Journal Title: Journal of Instrumentation Volume: 13
  • DOI: 10.1088/1748-0221/13/01/c01010
  • NAID: 120007126856
  • Peer Reviewed / Int'l Joint Research
• [Presentation] 協同トムソン散乱計測により得られた散乱スペクトルの速度空間再構成 (2020)
  • Author(s): 西浦正樹、釼持尚輝、奴賀秀男、關良輔、久保伸、田中謙治、足立迅、下妻隆、矢内亮馬、斉藤輝雄、Moseev Dmitry、Salewski Mirko、LHD実験グループ
  • Organizer: 日本物理学会第75回年次大会
• [Presentation] Observation of Multi-Peak Frequency Spectrum in a High Power Sub-THz Gyrotron (2019)
  • Author(s): Teruo Saito, Shunsuke Tanaka, Ryuji Shinbayashi, Yuusuke Yamaguchi, Masafumi Fukunari, Yoshinori Tatematsu, Maria M. Melnikova, and Nikita M. Ryskin
  • Organizer: 44th International Conference on Infrared, Millimeter, and Terahertz Waves
  • Int'l Joint Research
• [Presentation] Direct detection system of EBW by sub-Tera-Hz gyrotron scattering in the QUEST (2019)
  • Author(s): Shin Kubo, Hiroshi Idei, Teruo Saito, Yoshinori Tatematsu, Daichi Ogata
  • Organizer: US-Japan Workshop on RF Heating Physics
  • Int'l Joint Research
• [Presentation] Collective Thomson scattering with 77, 154, and 300 GHz sources in LHD (2019)
  • Author(s): M. Nishiura, K. Tanaka, S. Kubo, T. Saito, N. Kenmochi, H. Nuga, R. Seki, T. Shimozuma, Y. Yoshimura, H. Igami, H. Takahashi, T. I. Tsujimura, R. Yanai, Y. Tatematsu, LHD experiment group
  • Organizer: Laser Aided Plasma Diagnostics 2019
  • Int'l Joint Research / Invited
• [Presentation] 300GHz 帯高出力ジャイロトロンの開発 (2019)
  • Author(s): 斉藤輝雄、山口裕資、福成雅史、立松芳典
  • Organizer: 第28 回（2019 年度）日本赤外線学会研究発表会
• [Presentation] 協同トムソン散乱計測における高速イオンの速度空間と計測スペクトルの関係 (2019)
  • Author(s): 西浦正樹，釼持尚輝，怒賀秀男，關良輔，久保伸，田中謙治，下妻隆，斉藤輝雄
  • Organizer: プラズマ・核融合学会第36回年会
• [Presentation] 300 GHz帯高出力ジャイロトロンにおける複数ピーク周波数スペクトルの観測 (2019)
  • Author(s): 斉藤輝雄, 田中俊輔, 新林竜志, 山口裕資, 福成雅史, 立松芳典, Maria M. Melnikova, and Nikita M. Ryskin
  • Organizer: プラズマ・核融合学会第36回年会
• [Presentation] Frequency Stability of a High Power Sub-THz Gyrotron (2019)
  • Author(s): Teruo Saito, Shunsuke Tanaka, Ryuji Shinbayashi, Yoshinori Tatematsu, Yuusuke Yamaguchi and Masafumi Fukunari
  • Organizer: The 7th International Workshop on Far-Infrared Technologies 2019
  • Int'l Joint Research
• [Presentation] LHDにおける協同トムソン散乱計測により 得られた散乱スペクトルの評価 (2019)
  • Author(s): 西浦正樹，久保伸，田中謙治，飯澤萌，釼持尚輝，下妻隆，高橋裕己，斉藤輝雄，LHD実験グループ
  • Organizer: 日本物理学会第74回年次大会
• [Presentation] 154 GHz Collective Thomson Scattering (CTS) diagnostic for H and D plasmas in LHD (2018)
  • Author(s): M. Nishiura, K. Tanaka, S. Kubo, N. Kenmochi, K. Nakamura, T. Shimozuma, T. Saito, D. Moseev, LHD experiment group
  • Organizer: 22nd Topical Conference on High Temperature Plasma
  • Int'l Joint Research
• [Presentation] Developments for collective Thomson scattering equipment with a sub-THz gyrotron in LHD (2018)
  • Author(s): T. Saito, Y. Tatematsu, Y. Yamaguchi, M. Fukunari, T. Hirobe, R. Shinbayashi, S. Tanaka, K. Ohkubo, S. Kubo, T. Shimozuma, K. Tanaka and M. Nishiura
  • Organizer: 20th Joint Workshop on Electron Cyclotron Emission (ECE) and Electron Cyclotron Resonance Heating
  • Int'l Joint Research
• [Presentation] LHDの水素と重水素プラズマにおける協同トムソン散乱計測 (2018)
  • Author(s): M. Nishiura, K. Tanaka, S. Kubo, N. Kenmochi, K. Nakamura, T. Shimozuma, T. Saito, D. Moseev, LHD experiment group
  • Organizer: 第１２回核融合エネルギー連合講演会
• [Presentation] Developments of Equipment for Sub-THz Collective Thomson Scattering in LHD (2018)
  • Author(s): T. Saito, S. Tanaka, R. Shinbayashi, T. Hirobe, Y. Yamaguchi, M. Fukunari, Y. Tatematsu, K. Ohkubo, S. Kubo, T. Shimozuma, K. Tanaka and M. Nishiura
  • Organizer: 43 International Conference on Infrared, Millimeter and Terahertz Waves
  • Int'l Joint Research
• [Presentation] LHDにおけるサブテラヘルツ帯協同トムソン散乱計測のための機器開発と準備 (2018)
  • Author(s): 斉藤輝雄, 田中俊輔, 新林竜志, 山口裕資, 福成雅史, 立松芳典, 大久保邦三 , 久保伸,下妻隆,田中謙治, 西浦正樹
  • Organizer: プラズマ・核融合学会第35回年会
• [Presentation] LHD における CTS 計測用 300 GHz 帯ジャイロトロンの発振特性 (2018)
  • Author(s): 田中俊輔, 斉藤輝雄,新林竜志, 山口裕資, 福成雅史, 立松芳典, 久保伸,下妻隆, 田中謙治, 西浦正樹
  • Organizer: プラズマ・核融合学会第35回年会
• [Presentation] LHDにおける300GHz帯CTS計測用ジャイロトロン出力ビームの整形と3.5インチコルゲート導波管伝送試験 (2018)
  • Author(s): 新林竜志, 田中俊輔, 斉藤輝雄, 大久保邦三, 山口裕資, 福成雅史, 立松芳典, 久保伸, 下妻隆, 田中謙治, 西浦正樹
  • Organizer: プラズマ・核融合学会第35回年会
• [Presentation] Design Consideration and Oscillation Characteristics of High-Power 300 GHz Gyroton (2017)
  • Author(s): T. Saito, Y. Yamaguchi, M. Fukunari, Y. Tatematsu, T. Hirobe, R. Shinbayashi, S. Tanaka, S. Kubo, T. Shimozuma, K. Tanaka and M. Nishiura
  • Organizer: 42 International Conference on Infrared, Millimeter and Terahertz Waves
  • Int'l Joint Research
• [Presentation] 154GHz collective Thomson scattering in LHD (2017)
  • Author(s): K. Tanaka, M. Nishiura, S. Kubo, T. Shimozuma, T. Saito, D. Moseev, and I. Abramovic
  • Organizer: 18th Laser Aided Plasma Diagnostics
  • Int'l Joint Research
• [Presentation] 300 GHz帯CTS計測用パルスジャイロトロンの安定発振の確認と発振特性の検討 (2017)
  • Author(s): 田中俊輔, 廣部匠, 新林竜志, 福成雅史, 山口裕資, 立松芳典, 斉藤輝雄, 久保伸, 下妻隆, 田中謙治, 西浦正樹
  • Organizer: Plasma Conference 2017
• [Presentation] 300 GHz帯CTS計測用パルスジャイロトロン出力を用いたコルゲート導波管伝送試験Ⅱ (2017)
  • Author(s): 廣部匠，新林竜志，田中俊輔，横山哲士，山口裕資，福成雅史，斉藤輝雄，立松芳典，大久保邦三，久保伸，下妻隆，田中謙治，西浦正樹
  • Organizer: Plasma Conference 2017
• [Presentation] 300 GHz帯CTS計測用パルスジャイロトロン出力を用いたコルゲート導波管伝送試験Ⅲ (2017)
  • Author(s): 新林竜志，廣部匠，田中俊輔，横山哲士，山口裕資，福成雅史，斉藤輝雄，立松芳典，大久保邦三，久保伸，下妻隆，田中謙治，西浦正樹
  • Organizer: Plasma Conference 2017
• [Presentation] 303 GHzミリ波大気放電の電界面と磁界面における構造と電離波面進展速度の電力密度依存性 (2017)
  • Author(s): 横山哲士、福成雅史、廣部 匠、新林竜志、田中俊輔、斉藤輝雄、山口裕資、立松芳典
  • Organizer: 2017年度日本物理学会北陸支部会定例学術講演会