Development of Dynamic Divertor by Doublet Configuration

2012 Fiscal Year Final Research Report

• Project/Area Number: 22656208
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Single-year Grants
• Research Field: Nuclear fusion studies
• Research Institution: The University of Tokyo
• Principal Investigator: ONO Yasushi 東京大学, 大学院・新領域創成科学研究科, 教授 (30214191)
• Co-Investigator(Renkei-kenkyūsha): YAMADA Takuma 東京大学, 大学院・新領域創成科学研究科, 助教 (90437773)
• Project Period (FY): 2010 – 2012
• Keywords: 燃料 / ブランケット / プラズモイド

Research Abstract

We studied controlled plasmoid ejections from the main plasmas for a new type divertor, called“Dynamic divertor”. Using the TS-4 spherical tokamak experimentand 2-D MHD simulation, we demonstrated for the first time,periodic ejections of plasmoids from the main plasma, theirtransportation and reconnection with the divertor plate. Since the plasmoid can transport all heat flux from the main plasma, impurity pellet/ gasinjection to the isolated plasmoid is expected to reduce the heat load to the divertor platessignificantly.

Research Products

• [Journal Article] Spontaneous three-dimensional magnetic reconnection in merging toroidal plasma experiment (2013)
  • Author(s): T. Ii, Y. Ono
  • Journal Title: Physics Plasmas Volume: 20 Pages: 012106-012112
  • DOI: DOI:10.1063/1.4774403.
  • Peer Reviewed
• [Journal Article] 物理科学, この1年プラズマ中の磁力線再結合と巨大加熱 (2013)
  • Author(s): 小野靖
  • Journal Title: パリティ Volume: 28 Pages: 14-15
• [Journal Article] Electron Acceleration by Magnetic Reconnection During Spherical Tokamak Merging Experiment (2013)
  • Author(s): S. Kamio, K. Yamasaki, K. Takemura, Q. H. Cao, T. G. Watanabe, H. Itagaki, T. Tsutsui, K. Ishiguchi, R. Imazawa, T. Yamada, C. Z. Cheng, M. Inomoto, Y. Ono
  • Journal Title: IEEJ Transactions on Fundamentals and Materials Volume: 133 Pages: 166-172
  • DOI: DOI:10.1541/ieejfms.133.166.
  • URL: http://dx.doi.org/
  • Peer Reviewed
• [Journal Article] Development of Multichannel Doppler Spectroscopic Measurement System Using8x8 Multianode Photomultiplier Tube Assembly (2012)
  • Author(s): S. Kamio, N. Suzuki, Q. H. Cao, K. Abe, M. Sakumura, T. G. Watanabe, K. Ishiguchi, R. Imazawa, T. Yamada, M. Inomoto, Y. Takase, Y. Ono,
  • Journal Title: Review of Scientific Instruments Volume: 83 Pages: 83103
  • DOI: DOI:10.1063/1.4739774.
  • Peer Reviewed
• [Journal Article] Merging Experimental Study of High-Beta ST Formation for Non-Inductive Plasma Start-Up Assisted by NBI in TS-4 (2012)
  • Author(s): K. Gi, T. Ii, T. Umezawa, M. Inomoto, Y. Ono,
  • Journal Title: Plasma and Fusion Research Volume: 8 Pages: 1402023-1402027
  • DOI: DOI:10.1585/pfr.8.1402023.
  • Peer Reviewed
• [Journal Article] Development of a low-energy and high-current pulsed neutral beam injector with a washer-gun plasma source for high-beta plasma experiments (2012)
  • Author(s): T. Ii, K. Gi, T. Umezawa, T. Asai, M. Inomoto, Y. Ono
  • Journal Title: Review of Scientific Instruments Volume: 83 Pages: 083504-083509
  • DOI: DOI:10.1063/1.4744960.
  • Peer Reviewed
• [Journal Article] A Laboratory Experiment of Magnetic Reconnection: Outflows, Heating, and Waves in Chromospheric Jets", (2012)
  • Author(s): N. Nishizuka, Y. Hayashi, H. Tanabe, A. Kuwahata, Y. Kaminou, Y. Ono, M. Inomoto, T. Shimizu
  • Journal Title: Astrophysical Journal Volume: 756 Pages: 152-161
  • DOI: DOI:10.1088/0004-637X/756/2/152.
  • Peer Reviewed
• [Journal Article] Ion and electron heating characteristics of magnetic reconnection in tokamak plasma merging experiments (2012)
  • Author(s): Y. Ono, H. Tanabe, T. Yamada, M Inomoto, T. Ii, S. Inoue, M. Gryaznevich etc.
  • Journal Title: Plasma Physics and Controlled Nuclear Fusion Volume: 54 Pages: 124039-124049
  • Peer Reviewed
• [Journal Article] 小特集球状トカマク研究の進展2.4球状トカマク合体の応用 (2012)
  • Author(s): 小野靖
  • Journal Title: プラズマ核融合学会誌 Volume: 88 Pages: 733-739
• [Journal Article] 飛行時間差と往復反射を用いたトムソン散乱計測の2次元化の基礎研究 (2012)
  • Author(s): 伊藤慎悟,坂本恒之,小谷来太,井通暁, 小野靖,成原一途
  • Journal Title: 電気学会論文誌A Volume: 132-A Pages: 239-245
  • DOI: DOI:10.1541/ieejfms.132.239.
  • Peer Reviewed
• [Journal Article] プラズマ中の磁力線のインパルス型再結合現象 (2012)
  • Author(s): 林由記、伊井亨、井通暁、小野靖
  • Journal Title: 電気学会論文誌A Volume: 132-A Pages: 239-245
  • DOI: DOI:10.1541/ieejfms.132.239.
  • Peer Reviewed
• [Journal Article] 磁気リコネクションを介した異極性プラズマ合体実験における低周波磁場揺動の計測 (2012)
  • Author(s): 桑波田晃弘,田辺博士,伊藤慎悟,井通暁,小野靖
  • Journal Title: 電気学会論文誌A Volume: 132-A Pages: 233-238
  • DOI: DOI:10.1541/ieejfms.132.233.
  • Peer Reviewed
• [Journal Article] Double Null Merging Start-up Experiments in the University of Tokyo Spherical Tokamak (2011)
  • Author(s): T. Yamada, R. Imazawa, S. Kamio, R. Hihara, Y. Ono
  • Journal Title: Fusion Energy 2010 Pages: EXSP2-19
  • Peer Reviewed
• [Journal Article] Kinetic BehavioursofEnergetic Ions in Oblate Field-Reversed Configuration (2011)
  • Author(s): M. Iomoto, H. Imanaka, Y. Hayashi, S. Ito, Y. Ito, Y. Ono等
  • Journal Title: Fusion Energy 2010 Pages: ICCP7-01
  • Peer Reviewed
• [Journal Article] Development of Effective Power Supply Using Electric Double Layer Capacitor for Static Magnetic Field Coils in Fusion Plasma Experiments (2011)
  • Author(s): M. Inomoto, K. Abe, T. Yamada, A. Kuwahata, Y. Ono等
  • Journal Title: Review of Scientific Instruments Volume: 82 Pages: 023502-023056.
  • DOI: DOI:10.1063/1.3553283.
  • Peer Reviewed
• [Journal Article] Ion and Electron Heating Characteristics of Magnetic Reconnection in a Two Flux Loop Merging Experiment (2011)
  • Author(s): Y. Ono, H. Tanabe, Y. Hayashi, T. Ii, Y. Narushima, T. Yamada, M. Inomoto, C. Z. Cheng,
  • Journal Title: Physical Review Letters Volume: 107 Pages: 185001-185005
  • DOI: DOI:10.1103/PhysRevLett.107.185001
  • Peer Reviewed
• [Journal Article] (2011)
  • Author(s): Y. Ono, Y. Hayashi, T. Ii, Tanabe, S. Inoue, A. Kuwahata, T. Ito, Y. Kamino, T. Yamada,
  • Journal Title: Intermittent magnetic reconnection in TS-3 merging experiment Volume: 18 Pages: 111213-111219
  • DOI: DOI:10.1063/1.3662434
  • Peer Reviewed
• [Journal Article] Magnetic Helicity Injection Mechanism for Double-Null Startup of the UTST Spherical Tokamak Plasmas (2011)
  • Author(s): T. Watanabe, Y. Onoet al.
  • Journal Title: Plasma and Fusion Research Volume: 6 Pages: 1202131
  • DOI: DOI:10.1585/pfr.6.1202131
  • Peer Reviewed
• [Journal Article] プラズモイド放出を用いた動的ダイバータのMHDシミュレーション (2011)
  • Author(s): 井上静雄, 小野靖, 伊藤慎悟
  • Journal Title: 電気学会論文誌A Volume: 131-A Pages: 963-964
  • DOI: DOI:10.1541/ieejfms.131.963
  • Peer Reviewed
• [Journal Article] 磁力線追跡を用いた磁場反転配位の合体生成機構の実験的解析 (2011)
  • Author(s): 魏啓為, 伊井亨, 小野靖
  • Journal Title: 電気学会論文誌A Volume: 131-A Pages: 961-962
  • DOI: DOI:10.1541/ieejfms.131.961
  • Peer Reviewed
• [Journal Article] Low Frequency Magnetic Fluctuations during Magnetic Reconnection in Laboratory Experiment (2011)
  • Author(s): A. Kuwahata, H. Tanabe, S. Ito M. Inomoto, Y. Ono
  • Journal Title: Plasma and Fusion Research Volume: 6 Pages: 1201127
  • DOI: DOI:10.1585/pfr.6.1201127.
  • Peer Reviewed
• [Journal Article] Multipoint Spectroscopy Measurement of Spherical Tokamak Heating by Magnetic Reconnection in UTST (2011)
  • Author(s): S. Kamio, Q. Cao, K. Abe, M. Sakumura, N. Suzuki, , R. Imazawa, T. Yamada, M. Inomoto, Y. Onoetc.
  • Journal Title: Plasma and Fusion Research Volume: 6 Pages: 2402033
  • Peer Reviewed
• [Journal Article] トーラスプラズマ合体実験装置TS-4 における3 次元局所磁気リコネクション (2010)
  • Author(s): 伊井亨, 林由記, 井通暁, 小野靖
  • Journal Title: 電気学会論文誌A Volume: 130 Pages: 765-771
  • DOI: DOI:10.1541/ieejfms.130.765
  • Peer Reviewed
• [Journal Article] UTST における外部ポロイダル磁場コイルだけを用いた球状トカマク生成合体実験 (2010)
  • Author(s): 今澤良太,神尾修治,山田琢磨,井通暁,高瀬雄一,小野靖等
  • Journal Title: 電気学会論文誌A Volume: 130 Pages: 343-348
  • DOI: DOI:10.1541/ieejfms.130.343
  • Peer Reviewed
• [Journal Article] 多数の視線積分された分光スペクトルを用いた2次元局所イオン温度分布計測システム (2010)
  • Author(s): 田辺博士, Setthivoine You, 桑波田晃弘, 伊藤慎吾, 井通暁, 小野靖
  • Journal Title: 電気学会論文誌A Volume: 130 Pages: 772-777
  • Peer Reviewed
• [Journal Article] 電気2 重層キャパシタのパルスコイル電源への応用 (2010)
  • Author(s): 阿部圭太, 井通暁, 山田琢磨, 桑波田晃弘, 神尾修治, 小野靖等
  • Journal Title: 電気学会論文誌A, Volume: 130 Pages: 55-56
  • DOI: DOI:10.1541/ieejfms.131.55
  • Peer Reviewed
• [Journal Article] Merging start-up experiments on the UTST spherical tokamak (2010)
  • Author(s): T.Yamada, R. Imazawa, S.Kamio, R. Hihara, K. Abe, Y. Ono
  • Journal Title: Plasma and Fusion Research Volume: 5 Pages: S2100
  • DOI: DOI:10.1585/pfr.5.S2100
  • Peer Reviewed
• [Journal Article] Direct measurements of the high harmonic fast wave profile in the UTST (2010)
  • Author(s): T. Wakatsuki, Y. Nagashima, M. Inomoto, Y. Ono, Y. Takase
  • Journal Title: Plasma and Fusion Research Volume: 5 Pages: 018
  • DOI: DOI:10.1585/pfr.5.018
  • Peer Reviewed
• [Journal Article] Vector and scalar tomography ofcompact toroid plasmas (2010)
  • Author(s): S. You, H. Tanabe, Y. Ono, A. L. Balandin,
  • Journal Title: Journal of Fusion Energy Volume: 29 Pages: 592-595
  • DOI: DOI:10.1007/s10894-010-9317-8.
  • Peer Reviewed
• [Presentation] Cross-Validation of Experiment and Modeling for Fusion and Astrophysical PlasmasPhysics and Application of Magnetic Reconnection in Toroidal Plasmas (2012)
  • Author(s): Y. Ono
  • Organizer: 22nd International Toki Conference
  • Place of Presentation: Ceratopia Toki, Toki, Gifu
  • Year and Date: 2012-11-21
• [Presentation] Controlled Plasmoid Ejection from Spherical TokamakPlasmas for the Dynamic Divertor(Invited)", (2012)
  • Author(s): S. Inoue, Y. Ono, Y. Kaminou, R. Horiuchi,
  • Organizer: Fusion Energy Conference 2012
  • Place of Presentation: San Diego, USA,
  • Year and Date: 2012-10-12
• [Presentation] Ion and Electron HeatingC Characteristics of Magnetic Reconnection in Tokamak Plasma MergingExperiments (Invited) (2012)
  • Author(s): Y. Ono
  • Organizer: 39th European Physical Society Conference on Plasma Physics and 16th International Congress on Plasma Physics,
  • Place of Presentation: Stockholm, Sweden
  • Year and Date: 2012-07-05
• [Presentation] Dynamic divertor by plasmoid ejection (2012)
  • Author(s): S. Inoue, Y. Ono, Y. Kaminou, R. Horiuchi ,
  • Organizer: 39th European Physical Society Conference on Plasma Physics and 16th International Congress on Plasma Physics
  • Place of Presentation: Stockholm, Sweden
  • Year and Date: 2012-07-05
• [Presentation] Impulsively Fast Magnetic Reconnection by Acceleration of Ejecting Plasmoid Motion (2012)
  • Author(s): Y. Ono,C. Z. Cheng, Y. Hayashi, T. Ii, S. Inoue, M. Inomoto
  • Organizer: MR2012 Workshop
  • Place of Presentation: Princeton, USA
  • Year and Date: 2012-05-24
• [Presentation] TS-4球状トカマク実験のフラスモイト放出を用いた動的タイハータの提案 (2011)
  • Author(s): 井上静雄, 小野靖, 伊藤慎悟, 井通暁
  • Organizer: Plasma Conference 2011
  • Place of Presentation: 石川県立音楽堂, 金沢
  • Year and Date: 2011-11-22
• [Presentation] Dynamic Divertor Concept by PlasmoidEjection in TS-4 Spherical Tokamak Experiment (2011)
  • Author(s): S. Inoue, Y. Ono, S. Ito, M. Inomoto, R. Horiuchi,
  • Organizer: 53rd Annual Meeting of the American Physical Society Division of Plasma Physics
  • Place of Presentation: Salt Lake City, USA
  • Year and Date: 2011-11-16
• [Presentation] High Power Heating of Magnetic Reconnection in Laboratory Merging Experiments (2011)
  • Author(s): Y. Ono.
  • Organizer: 11th International Workshop on the Interrelationship between Plasma Experiments in the Laboratory and in Space (IPELS)
  • Place of Presentation: Whistler, Canada
  • Year and Date: 2011-07-15
• [Presentation] High Power Heating of Magnetic Reconnection in Tokamak Plasma Merging Experiments (Invited) (2011)
  • Author(s): Y. Ono.
  • Organizer: MHD and Kinetic Processes in Laboratory, Space and Astrophysical Plasmas (LSAP2011) Workshop
  • Place of Presentation: 中国, 北京
  • Year and Date: 2011-05-30
• [Presentation] Fast Magnetic Reconnection and Its High Power Heating in TS-4 Merging Experiment (2010)
  • Author(s): Y. Ono.
  • Organizer: The PSSC/NCKU Seminar
  • Place of Presentation: 台南, 台湾
  • Year and Date: 2010-11-18
• [Presentation] Laboratory Magnetic Reconnection Experiments (2010)
  • Author(s): Y. Ono.
  • Organizer: The 11thAsian Pacific Physics Conference (APPC11)
  • Place of Presentation: 上海,中国
  • Year and Date: 2010-11-16
• [Presentation] Laboratory Magnetic Reconnection Experiments (2010)
  • Author(s): Y. Ono
  • Organizer: 38thScientific Assembly of the Committee on Space Research (COSPAR 2010)
  • Place of Presentation: ブレーメン, ドイツ
  • Year and Date: 2010-07-17
• [Remarks]
  • URL: http://tanuki.t.u-tokyo.ac.jp/