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Comparison of confinement physiscs for toroidal plasmas

Research Project

Project/Area Number 11695035
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field プラズマ理工学
Research InstitutionNatiomal Institute for Fusion Science

Principal Investigator

HAYASHI Takaya  Natiomal Institute for Fusion Science Theory and Computer Simlation Center, Professor, 理論・シミュレーション研究センター, 教授 (60156445)

Co-Investigator(Kenkyū-buntansha) TOHI Kazuo  Natiomal Institute for Fusion Science Department of Large Helical Device Project,Professor, 大型ヘリカル研究部, 教授 (20093057)
KAWAHATA Kazuo  Natiomal Institute for Fusion Science Department of Large Helical Device Project,Professor, 大型ヘリカル研究部, 教授 (60109353)
SATO Tetsuya  Natiomal Institute for Fusion Science Theory and Computer Simlation Center,Professor, 理論・シミュレーション研究センター, 教授 (80025395)
SUGAMA Hideo  Natiomal Institute for Fusion Science Department of Large Helical Device Project,Associated Professor, 大型ヘリカル研究部, 助教授 (80202125)
KUMAZAWA Ryuhei  Natiomal Institute for Fusion Science Department of Large Helical Device Project,Associated Professor, 大型ヘリカル研究部, 助教授 (70109354)
中島 徳嘉  核融合科学研究所, 大型ヘリカル研究部, 助教授 (30172315)
Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥4,600,000 (Direct Cost: ¥4,600,000)
Fiscal Year 2001: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 2000: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1999: ¥1,600,000 (Direct Cost: ¥1,600,000)
Keywordstoroidal plasma / plasma confinement / virtual reality / helical plasma / plasma diagnostic / plasma heating / plasma stability / comquter simulation
Research Abstract

1. Virtual reality display system was developed as an advanced visualization method to understand complex phenomena in fusion plasmas by using computer simulation. In particular, interfaces between the display system and human beings have been developed, and we have realized a method to analyze conveniently and efficiently computation results in interactive way in the virtual reality space. 2. Three dimensional nonlinear MHD simulation on spherical tokamak dynamics was executed to obtain occurrence of global relaxation phenomena, starting from an initial state based on an actual experimental observation. After a process of pressure collapse, the torus returns to a state close to the axisymmetric initial configuration but with a broader pressure profile. 3. The three dimensional equilibrium code HINT, which does not assume the existence of nested magnetic surfaces, was modified to extend functions. 4. A new MHD simulation code for a full three dimensional geometry of helical plasmas were developed and applied for nonlinear growth of unstable modes in the LHD configuration. A relaxation phenomenon driven by pressure driven instabilities was observed, which was not destructive but caused transition to a new equilibrium. 5. A modeling was made to describe basic dynamics of the anomalous transport phenomena. Incorrect mathematical treatment of singularity in previous modeling by other authors was indicated and a new modeling was proposed. 6. Experiments of helical plasmas were executed to study fluctuations in periphery plasmas and improvement of confinement. A reversal of particle flux from outward to inward was found.

Report

(4 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (31 results)

All Other

All Publications (31 results)

  • [Publications] Hayashi Takaya: "Island formation for finite pressure equilibria in non-axisymmetric tori"Contribution for Plasma Physics. (in print). (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Miura Hideaki: "Nonlinear simulation of resistive ballooning modes in Large Helical Device"Physics of Plasmas. 8・11. 4870-4878 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Hayashi Takaya: "Computer Simulation of Nonlinear Phenomena in Plasmas"Computer Physics Communications. 142・12. 49-54 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Hayashi Takaya: "Magnetic Reconnection and Relaxation Phenomena in Spherical Tokamak"Earth Planets Space. 53・6. 561-564 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Hayashi Takaya: "Recent Progress in Simulation Study of Magnetically Confined Plasmas"Journal of Plasma and Fusion Research. 77・6. 521-524 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Hayashi Takaya: "Formation of Magnetic Islands in 3D Equilibaria of Helical Plasmas"Journal of Plasma and Fusion Research. 77・6. 594-600 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Miura Hideaki: "Nonlinear simulation of resistive ballooning modes in Large Helical Device"PhysiiCS of Plasmas. 8-11. 4870-4878 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Tamura Yuichi: "Virtual reality system to visualize and auralize numerical simulation data"Computer Physics Communications,. 142-12. 227-230 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Hayashi Takaya: "Magnetic Reconnection and Relaxation Phenomena in Spherical Tokamak"Earth Planets Space. 53-6. 561-564 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Rowena Ball: "Understanding critical behavior through visualization: A walk around the pitchfork"Computer Physics Communications,. 142-12. 71-75 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Hayashi Takaya: "Island formation for finite pressure equilibria in non-axisymmetric tori"Contribution for Plasma Physicprint. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Hayashi Takaya: "Computer Simulation of Nonlinear Phenomena in Plasmas"Computer Physics Communications,. 142-12. 49-54 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Hayashi Takaya: "Recent progress in simulation study of magnetically confined plasmas"Journal of Plasma and Fusion Research. 77-6. 521-524 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Hayashi Takaya: "Island formation for finite pressure equilibria in non-axisymmetric tori"Contribution for Plasma Physics. (In print). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Miura Hideaki: "Nonlinear simulation of resistive ballooning modes in Large Helical Device"Physics of Plasmas. 8・11. 4870-4878 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hayashi Takaya: "Computer Simulation of Nonlinear Phenomena in Plasmas"Computer Physics Communications. 142・12. 49-54 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hayashi Takaya: "Magnetic Reconnection and Relaxation Phenomena in Spherical Tokamak"Earth Planets Space. 53・6. 561-564 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hayashi Takaya: "Recent Progress in Simulation Study of Magnetically Confined Plasmas"Journal of Plasma and Fusion Research. 77・6. 521-524 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hayashi Takaya: "Formation of Magnetic lslands in 3D Equilibria of Helical Plasmas"Journal of Plasma and Fusion Research. 77・6. 594-600 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hayashi Takaya: "ヘリカル系プラズマ3次元平衡における磁気島"プラズマ核融合学会誌. (印刷中). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Rowena Ball: "Singularity Theory Study of Overdetermination in Models for L-H Transitions"Physical Review Letters. 84,14. 3077-3080 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 田村祐一: "数値シミュレーションデータ表現のための音情報機能を付加したバーチャルリアリティシステムの開発"日本バーチャルリアリティ学会誌. 5,3. 120-125 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Hayashi Takaya: "Relaxation Phenomena in Spherical Tokamak"Progress of Theoretical Physics Supplement. No.138. 712-713 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Todo Yasushi: "Fokker-Planck Simulation Study of Alfven Eigenmode Burst"Nuclear Fusion. (In print). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Watanabe Tomohiko: "Nondissipative kinetic simulation and analytical solution of three-mode equations of the ion temperature gradient instability"Physics of Plasmas. 7,3. 984-990 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Takaya Hayashi: "Computer simulation of internal reconnection event in spherical tokamak"Nuclear Fusion. 40, 3. 721-728 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Takaya Hayashi: "Relaxation phenomena in spherical tokamak"Progress of Theoretical Physics. (In press). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Naoki Mizuguchi: "Dynamics of Spherical Tokamak Plasma on Internal Reconnection Event"Physics of Plasmas. 7, 3. 940-949 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Tomohiko Watanabe: "Two-Dimensional MHD simulation of Merging Plasmas in Laboratory Experiments - Focussing on Its Dynamic Behaviors"J. Plasma Phys. Fusion Res.. 75, 9. 1119-1119 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Tomohiko Watanabe: "Modeling of magnetic island formation in magnetic reconnection experiment"Physics of Plasmas. 6, 8. 1253-1257 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Takaya Hayashi: "Self-Organizing Plasmas"Plasma Phys. Control. Fusion. 41, 4. 229-238 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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