• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

高温プラズマの自己維持乱流の確率的遷移の研究

Research Project

Project/Area Number 11878077
Research Category

Grant-in-Aid for Exploratory Research

Allocation TypeSingle-year Grants
Research Field プラズマ理工学
Research InstitutionKyushu University

Principal Investigator

伊藤 早苗  九州大学, 応用力学研究所, 教授 (70127611)

Co-Investigator(Kenkyū-buntansha) 伊藤 公孝  文部科学省, 核融合科学研究所, 教授 (50176327)
登田 慎一郎  文部科学省, 核融合科学研究所, 助手 (60332186)
矢木 雅敏  九州大学, 応用力学研究所, 助教授 (70274537)
川崎 光宏  九州大学, 応用力学研究所, COE非常勤研究員
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 2001: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2000: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1999: ¥700,000 (Direct Cost: ¥700,000)
Keywordsプラズマ乱流 / 自己維持乱流 / 遷移理論 / 遷移確率 / 分岐現象 / 確立統計理論 / 亞臨界乱流 / 確率統計理論 / プラズマ / 乱流 / 異常輸送 / 統計理論
Research Abstract

萌芽的研究の最終年度としてまとめるために、自己維持乱流モデルにおける統計的性質をとり入れる研究を進めた。新たな理論体系への挑戦として、スケール長が大きく異なる乱流が混在している状態を考え、そこでの統計的非線型相互作用をとり入れる理論モデルを定式化し論文として発表した。この多スケールを内在する状態の非線型理論はプラズマ分野のみならず、広い分野でも重要課題である。前年度まで構築して来た理論体系の枠組みが世界的に知られるところとなり、次の2件の国際会議での招待講演を行なった。(伊藤早苗:Transition in multiple-scale-length turbulence,電磁乱流の自己組織化と輸送の国際会議アックス・アン・プロバンス(フランス)2001年7月,伊藤早苗:Transitio in multiple-scale-length turbulence in plasmas,第43回米国物理学会(DPP),ロング・ビーチ(米国)2001年11月)
中性乱流の理論研究にも着手し、スワール流における乱流の統計的効果も新たに解析して論文として発表した。さらに確率方程式(ランジュバン方程式)を直接解いて性質を調べる研究も手がけ結果を発表した。
また最終年度をしめくくるに当たり、成果報告書をとりまとめて出版した。(2002年3月)本研究は、高温プラズマの自己維持乱流の確率的遷移を研究できる様に、現象の確率的描像を明らかにするとともに、理論体系に乱流の統計性を導入しようとする意欲的なものであったが、今後のこの研究課題に対する確固たる基盤を作ったと言える。

Report

(3 results)
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (28 results)

All Other

All Publications (28 results)

  • [Publications] K.L.Wong, K.Itoh, S.-I.Itoh, A.Fukuyama, M.Yagi: "Short wavelength fluctuations and electron transport in TFTR"Physics Letters A. 276. 281-285 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] U.Stroth, K.Itoh, S.-I.Itoh, H.Laqua, the ECRH team, the W7-AS team: "Internal Transport Barrier Triggered by Neoclassical Transport in W7-AS"Phys. Rev. Lett.. 86・26. 5910-5913 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Yokoyama, K.Itoh, S.Okamura, K.Matsuoka, S.-I.Itoh: "Maximum-J capability in a quasiaxisymmetric stellarator"Physical review E. 64・015401. 1-3 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Itoh, H.Sanuki, S.Toda, M.Yokoyama, S.-I.Itoh, M.Yagi, A.Fukuyama: "Transition of Radial Electric Field in Helical Systems"Journal of the Physical Society of Japan. 70・06. 1575-1584 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] S.-I.Itoh, K.Itoh: "Statistical Theory and Transition in Multiple-scale-lengths Turbulence in Plasmas"Plasma Phys. Control. Fusion. 43・07. 1055-1102 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] A.Yoshizawa, N.Yokoi, S.Nisizima, S.-I.Itoh, K.Itoh: "Variational approach to a turbulent swirling pipe flow with the aid of helicity"Physics of Fluids. 13・08. 2309-2319 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] A.Fujisawa, H.Iguch, T.Minami, Y.Yoshimura, H, Sanuki, K.Itoh, M.Isobe, S.Nishimura, C.Suzuk, K.Tanaka, M.Osakabe, I.Nomura, K.Ida, S.Okamura, K.Toi, S.Kado, R.Akiyama, A.Shimizu, C.Takahashi, M.Kojima, S.-I.Itoh, K.Matsuoka, Y.Hamada, M.Fujiwara: "Observation of bifurcation properties of radial electric fields using a heavy ion beam probe"Nuclear Fusion. 41・05. 575-584 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Itoh, S.-I.Itoh, L.Giannone: "Modelling of Density Limit Phenomena in Toroidal Helical Plasmas"Journal of the Physical Society of Japan. 70・11. 3274-3284 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Kawasaki, A.Furuya, M.Yagi, K.Itoh, S.-I.Itoh: "Transition probability to turbulent transport regime"Plasma Physics and Controlled Fusion. (In press). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] M.Yagi, Y.Idomura, Watanabe: "Simulation Study of Anomalous Transport 邦題 異常輸送のシミュレーション研究(日本語論文)"Journal of Plasma and Fusion Research. 77・6. 521-557 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] S.Toda, K.Itoh: "Analysis of structure and transition of radial electric field in helical systems"Plasma Phys. Contr. Fusion. 43・5. 629-643 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Ida, T.Minami, Y.Yoshimura, A.Fujisawa, C.Suzuki, S.Okamura, S.Nishimura, M.Isobe, H.Iguchi, K.Itoh, et al.: "Observation of toroidal flow antiparallel to the ExB drift direction in the hot electron mode plasmas in the Compact Helical System"Phys. Rev. Lett.. 86・14. 3040-3043 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] S.Toda, K.Itoh: "Theoretical Study of the structure of the electric field in helical toroidal plasmas Czechoslovak"Czechoslovak Journal of Physics. 51・10. 1087-1096 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] L.Giannone: "Physics of the density limit in the W7-AS stellarator"J.Plasma Fusion Res.SERIES. 3. 129-134 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 松川正吾: "Model analysis of edge relaxation phenomena in tokamak plasmas"Plasma Phys.Control,Fusion. 42,12. 1241-1257 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 古屋篤史: "Tearing mode Instability due to Anomalous Resistivity"Journal of the Physical Society of Japan. 70,2(in press). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 吉澤徴: "Turbulence theories and modelling of fluids and plasmas"Plasma Phys.Control.Fusion. 43,3. R1-R144 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 吉澤 徴: "Magnetohydrodynamic mechanisms of electric-field transport suppression and plasma-rotation generation,with special reference to tokamak's reversed-shear confinement"Physics of Plasmas. 6,8. 3194-3206 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 伊藤 早苗: "Statistical Theory of Subcritically-Excited Strong Turbulence in Inhomogeneous Plasmas.(I)"Journal of the Physical Society of Japan. 68.6. 1891-1906 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 伊藤 早苗: "Statistical Theory of Subcritically-Excited Strong Turbulence in Inhomogeneous Plasmas.(II)"Journal of the Physical Society of Japan. 68,8. 2611-2625 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 立石 権太: "Burning Analysis on the Improved Confinement Mode"Journal of the Physical Society of Japan. 68,10. 3277-3285 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 藤本 武: "New Shell Models for Rayleigh-Benard Turbulence"Journal of Plasma and Fusion Research. 75,10. 1195-1210 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 登田 慎一郎: "Probabilistic Nature in L/H Transition"Journal of the Physical Society of Japan. 68,11. 3520-3527 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 岩崎 拓也: "Fast responses in L-H transitions"nuclear fusion. 39.11. 2127-2130 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 伊藤 早苗: "Statistical Theory of Subcritically-Excited Strong Turbulence in Inhomogeneous Plasmas.(III)"Journal of the Physical Society of Japan. 69.2(印刷中). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 伊藤 早苗: "Statistical Theory of Subcritically-Excited Strong Turbulence in Inhomogeneous Plasmas.(IV)"Journal of the Physical Society of Japan. 69.2(印刷中). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 佐貫 平二: "Possibility of Electric Field Bifurcation and Internal Transport barrier Formation in LHD Plasma"Journal of the Physical Society of Japan. 69.2(印刷中). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 伊藤 公孝: "Transport and Structural Formation in Plasmas"Institute of Physics Publishing. 307 (1999)

    • Related Report
      1999 Annual Research Report

URL: 

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

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi