Proposal of advanced fueling diagnostic in high temperature plasmas by millimeter wave scattering

• Project/Area Number: 25630423
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Nuclear fusion studies
• Research Institution: The University of Tokyo
• Principal Investigator: NISHIURA Masaki 東京大学, 新領域創成科学研究科, 准教授 (60360616)
• Co-Investigator(Kenkyū-buntansha): KUBO Shin 核融合科学研究所, ヘリカル研究部, 教授 (80170025) ; TANAKA Kenji 核融合科学研究所, ヘリカル研究部, 准教授 (50260047) ; SHIMOZUMA Takashi 核融合科学研究所, ヘリカル研究部, 教授 (80270487)
• Co-Investigator(Renkei-kenkyūsha): SAITO Teruo 福井大学, 遠赤外領域開発研究センター, 教授 (80143163) ; TATEMATSU Yoshinori 福井大学, 遠赤外領域開発研究センター, 准教授 (50261756)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 協同トムソン散乱 / ミリ波 / スペクトル / イオンBernstein波 / プラズマ / 核融合 / イオン温度 / 分布関数 / スペクトルアナライザ

Outline of Final Research Achievements

For performance enhancement of self-burning fusion-plasmas, the fueling ratio ofions in DT nuclear fusion is essential. We proposed two methods for ion fueling ratio diagnostic by millimeter wave collective Thomson scattering; spectrum analysis and ion Bernstein wave detection.
In the first year, the frequency resolution is enhanced by a fast digitizer comibined with FFT analysis. In the second year, improvement of receiver antenna leads to succeed excited harmonic waves like an ion Bernstein wave.

Research Products

• [Journal Article] High-power pulsed gyrotron for 300 GHz-band collective Thomson scattering diagnostics in the Large Helical Device (2015)
  • Author(s): Yuusuke Yamaguchi, Teruo Saito, Yoshinori Tatematsu, Shinji Ikeuchi, Vladimir N. Manuilov, Jun Kasa, Masaki Kotera, Toshitaka Idehara, Shin Kubo, Takashi Shimozuma, Kenji Tanaka and Masaki Nishiura
  • Journal Title: Nuclear Fusion Volume: 55 Issue: 1 Pages: 013002-013002
  • DOI: 10.1088/0029-5515/55/1/013002
  • Peer Reviewed / Open Access
• [Journal Article] Developement of Fast Steerring Mirror Control System for Plasma Heating and Diagnostics (2014)
  • Author(s): K. Okada, M. Nishiyra, S. kubo, K. Tanaka et al,
  • Journal Title: Review of Scientfic Instruments Volume: 85 Issue: 11
  • DOI: 10.1063/1.4891044
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Recent Progress of Collective Thomson Scattering Diagnostic for LHD and Design Study for JT-60SA (2014)
  • Author(s): M. Nishiura, S. Kubo, K. Tanaka, R. Seki, S. Ogasawara, T. Shimozuma, K. Okada, S. Kobayashi, T. Mutoh, T. Watari, T. Saito, Y. Tatematsu, Y. Yamaguchi, K. Shinohara, A. Isayama, S. Moriyama, K. Itami
  • Journal Title: Proceedings of The 5th International Workshop on Far-Infrared Technologies 2014(IW-FIRT2014) Volume: 1
• [Journal Article] Spectrum response and analysis of 77-GHz band collective Thomson scattering diagnostic for bulk and fast ions in LHD plasmas (2014)
  • Author(s): M. Nishiura, S. Kubo, K. Tanaka, R. Seki, S. Ogasawara, T. Shimozuma, K. Okada, S. Kobayashi, T. Mutoh, K. Kawahata, T. Watari, LHD experiment group, T. Saito, Y. Tatematsu, S. B. Korsholm, M. Salewski
  • Journal Title: Nuclear Fusion Volume: 54 Issue: 2 Pages: 023006-023006
  • DOI: 10.1088/0029-5515/54/2/023006
  • Peer Reviewed
• [Journal Article] Optimization of Megawatt 77-GHz Gyrotron Operation for Collective Thomson Scattering in LHD (2013)
  • Author(s): S. Ogasawara, S. Kubo, M. Nishiura, Y. Tatematsu, T. Saito, K. Tanaka, T.
  • Journal Title: Plasma and Fusion Research Volume: 8 Issue: 0 Pages: 2402069-2402069
  • DOI: 10.1585/pfr.8.2402069
  • NAID: 130004685104
  • ISSN: 1880-6821
  • Peer Reviewed
• [Journal Article] Notch Filter in 70 GHz Range for Microwave Plasma Diagnostics (2013)
  • Author(s): M. Nishiura, S.Kubo, K. Tanaka, T. Shimozuma, et al.,
  • Journal Title: Plasma and Fusion Research Volume: 8 Issue: 0 Pages: 2402027-2402027
  • DOI: 10.1585/pfr.8.2402027
  • NAID: 130004678529
  • ISSN: 1880-6821
  • Peer Reviewed
• [Presentation] LHD協同トムソン散乱計測の最近の進展とJT-60SAへの適用検討 (2014)
  • Author(s): 西浦正樹，久保伸，田中謙治，關良輔，小笠原慎也，下妻隆，岡田宏太，小林策治，武藤敬，渡利徹夫，斉藤輝雄，立松芳典，山口祐資，篠原孝司，諫山明彦，森山伸一，伊丹潔，LHD実験グループ
  • Organizer: 第10回核融合エネルギー連合講演会
  • Place of Presentation: つくば国際会議場（茨城県つくば市）
  • Year and Date: 2014-06-20
• [Presentation] Recent Progress of Collective Thomson Scattering Diagnostic for LHD and Design Study for JT-60SA (2014)
  • Author(s): M. Nishiura, S. Kubo, K. Tanaka, R. Seki, S. Ogasawara, T. Shimozuma, K. Okada, S. Kobayashi, T. Mutoh, T. Watari, T. Saito, Y. Tatematsu, Y. Yamaguchi, K. Shinohara, A. Isayama, S. Moriyama, K. Itami
  • Organizer: The 5th International Workshop on Far-Infrared Technologies 2014(IW-FIRT2014)
  • Place of Presentation: Univ. of Fukui
  • Invited
• [Presentation] Progress on collective Thomson scattering diagnostic in the Large Helical Device (2013)
  • Author(s): M. Nishiura, S. Kubo, K. Tanaka, R. Seki, S. Ogasawara, T. Shimozuma, K. Okada, S. Kobayashi, T. Mutoh, K. Kawahata, T. Watari, T. Saito, Y. Tatematsu, LHD experiment group
  • Organizer: 40th European Physical Society Conference on Plasma Physics
  • Place of Presentation: Espoo, Finland
• [Remarks] 吉田・西浦研究室HP
  • URL: http://www.ppl.k.u-tokyo.ac.jp/
• [Remarks] 研究紹介
  • URL: http://www.k.u-tokyo.ac.jp/pros/person/masaki_nishiura/masaki_nishiura.htm