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Fundumantal Research for Dynamic Engalic Dovertas

Research Project

Project/Area Number 09308018
Research Category

Grant-in-Aid for Scientific Research (A).

Allocation TypeSingle-year Grants
Section一般
Research Field Nuclear fusion studies
Research InstitutionNagoya University

Principal Investigator

TAKAMURA Shuichi  Nagoya University, Graduate School of Engineering, Professor, 工学研究科, 教授 (40023254)

Co-Investigator(Kenkyū-buntansha) YE Miyou  Nagoya University, Fraduate School of Engineering, Research Associate, 工学研究科, 助手 (10270985)
OHNO Noriyasu  Nagoya University, Fraduate School of Engineering, Lecturer, 工学研究科, 講師 (60203890)
UESUGI Yoshihiko  Nagoya University, Center for Integrated Research in Science and Engineering, Asociate Professor, 理工科学総合研究センター, 助教授 (90213339)
Project Period (FY) 1997 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥31,700,000 (Direct Cost: ¥31,700,000)
Fiscal Year 2000: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1999: ¥5,400,000 (Direct Cost: ¥5,400,000)
Fiscal Year 1998: ¥8,600,000 (Direct Cost: ¥8,600,000)
Fiscal Year 1997: ¥15,600,000 (Direct Cost: ¥15,600,000)
KeywordsFusion plasma / Engafic divertor / Magnetic island / Stachastic magnetic field / Ratating helical field / tearing mode / Magnetic Rayonlds number / Hydigen recycling / 磁気レイノルズ数 / トカマク / 統計電磁場構造 / 核融合 / 回転ヘリカル磁場 / 統計的磁場 / プラズマ回転 / プラズマ粘性
Research Abstract

1. Hydrogen recycling in long-pulse tokamak discharge
By applying the static or rotating helical magnetic field, the surface area contacting with the plasma was found to increase so that the fresh wall surface enhances the wall pumping.
2. Magnetic island formation due to rotating helical magnetic perturbation
When the relative poloidal velocity between the tokamak plasma and the rotating helical field is relatively small, the growth of tearing-mode by magnetic reconnection produces finally the formation of magnetic island. It deforms the equilibrium magnetic flux surface so that the plasma current may be modulated in radial and poloidal directions. Such a modulation has been detected through an amplification of perturbed radial magnetic field. The redistribution of plasma current due to magnetic island development has been clearly observed at the main resonance layer of magnetic helicity.
3. Enhanced attenuation of penetrating perturbed magnetic field
When the relative poloidal velocity me … More ntioned in the previous section is large and the electron temperature at the resonance layer is relatively high, the screening current flows at this resonance layer so that a strong attenuation of penetrating external magnetic perturbation has been observed. The magnetic perturbation with a fixed frequency produces either a magnetic island formation or an attenuation of helical field, depending on the direction of field rotation. Such an attenuation has been thought not only by a main resonance at m/n=6/1 but also by some contributions from the side-band modes of m/n=7/1, 8/1 generated by the toroidal effect, which has been investigated numerical modelling.
4. Temporal modulation of electron temperature profile
The deformation of magnetic flux surface due to island formation generates temporal modulation of the radial profile of electron temperature. The effect with and without magnetic island formation may produces different behaviors, which has been investigated now.
5. Excitation of shear Alfven waves and other phenomena
The shear Alfven resonance is located at very close to the magnetic resonance layer. The magnetic field enhancement due to Alfven resonance has been tried to be detected by observing the radial component of perturbed magnetic field at a toroidal section without local helical winding. There have been observed some enhancement close to the Alfven resonance layer. The phase information on the 2-D poloidal cross-section has been investigated to make clear the contribution of Alfven resonance. Less

Report

(5 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] Masahiro KOBAYAHI 他: "Modification of Hydrogen Recycling due to Edge Ergodic Hagnetic Layer in Long Tokumak Discharge with High Duty"Journal of Nuclear Materials. 266-269. 1118-1122 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 小島寛樹 他: "インバータ電源を用いた多モード放電トカヌクシステムの構築"電気学会論文誌A. 119・A. 1436-1443 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Masahiro KOBAYASHI 他: "Interaction of Externally Applied Rotating Helical Field with Tokamak Plasina"Nuclear Fugion. 40. 181-193 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Hiroki KOJIMA 他: "Research Tokamak System with Multsmale Dischanges using Invertor Pomer Supply"Electrical Engineering in Japan. 133. 1436-1444 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Takashi TURA 他: "Interaction of Externally Applied Helical Field with Tokamak Plasina"Contributions to Plasma Physics. 40. 256-259 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Masahiro KOBAYASHI 他: "Frequency Dependance of Tokamak Plasma Response its the Externally Applied Rotating Helical Field"Physics of Plasinas. 7. 3288-3300 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 菊池祐介 他: "動的エルゴディックダイバータ実験を用いる局所ヘリカルコイル系の特性評価"電気学会論文誌A. 121A. 249-255 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Kobayashi et al.: "Modification of Hydrogen Recycling due to Edge Engodic Magnetic Lager in Long Tokamak Dischang with High Daty"Journal of Nuclear Material. 266-269. 1118-1122 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Kobayashi et al.: "Interaction of Enternally Applied Rateting Helical Field with Tokamak plasma""Nuclear Fusion. 40. 181-193 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] H.Kojima et al.: "Research Tokanah System with Maltiple Dischanges using Iaver to Power Supply"Electrical Engineering in Japan. 133. 1436-1444 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] T.Tuda et al.: "Interaction of Enternally Applied Hdical Field with Tokanah Plasma"Contributions to Plasma Physics. 40. 256-259 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Kobayashi et al: "Frequency Dependence of Tokamach Plasma Response to the Externally Applied Rotating Helical Field""Physics of Plasmas. 7. 3283-3300 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Y.Kikachi et al.: "Evaluation o Loial Holicel Coil System for Dynamic Ergocirc Divertor Ergocirc Divertor Experiments"Transactions of the Institute of Electrical Engineers in Japan. 121A. 245-255 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Masahiro KOBAYASHI 他: "Modification of hydrogen Recycling due to Edge Ergodic Magnetic Layer in Long Tokamak Discharge with High Duty"Journal of Nuclear Materials . 266-269. 1118-1122 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] Masahiro KOBAYASHI 他: "Interaction of Externally Applied Rotating Halical Field with to Ramalic Plasua"Naclear Fasion . 40.2. 181-193 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Taleashi TUDA 他: "Interaction of Eiternally Applied Helical Field with Tokamak Plasma"Contributions to Plasma Physics . 40・3-4. 256-259 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Masahiro KOBAYASHI 他: "Frequency Dependence of Tokamak Plasma Response to the Externally Applied Rotating Helical Field"Physics of Plasmas. 7・8. 3288-3300 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 菊池祐介 他: "動的エルゴディックダイパータ実験に用いて局所ヘリカルコイル差の特性評価"電気学会論文誌A. 121A・3. 249-255 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Hiroki KOJIMA: "Research Tokamak System with Multimute Discharges using Inrertoo Power Supply"Electrical Engineering in Japan. 133・4. 1436-1444 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Masahiro KOBAYASHI 他: "Modification of Hydrogen Recycling due to Edge Ergodic Magnetic Layer in Long Tokamak Discharge with High Duty"Journal of Nuclear Materials. 266-269. 1118-1122 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Masahiro KOBAYASHI 他: Nuclear Fusion. 40・2. 181-193 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Masahiro KOBAYASHI 他: "High-Repatition High-Duty Tokamak Pisdarge with Long Duration" Japanese Journal of Applied Physics. 37・5A. 2701-2701 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Masahiro KOBAYASHI 他: "Modification of Hydrogen Recycling due to Edge Ergodic Magnetic Layer in Long Tokamak Discharge with High Duty" Journal of Nuclear Materials. (印刷中).

    • Related Report
      1998 Annual Research Report
  • [Publications] M.Kobayashi et al.: "High-Repctition High-Duty Tokamak Discharge with Long Duration in CSTU-III" Jpa.J.Appl.Phys.(印刷中).

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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