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高温プラズマの乱流遷移の確率統計理論の構築

Research Project

Project/Area Number 14380214
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 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) 矢木 雅敏  九州大学, 応用力学研究所, 助教授 (70274537)
伊藤 公孝  大学共同利用機関法人, 自然科学研究機構・核融合科学研究所, 教授 (50176327)
登田 慎一郎  大学共同利用機関法人, 自然科学研究機構・核融合科学研究所, 助手 (60332186)
川崎 光宏  九州大学, 応用力学研究所, COE研究員
Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥7,600,000 (Direct Cost: ¥7,600,000)
Fiscal Year 2004: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2003: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2002: ¥2,400,000 (Direct Cost: ¥2,400,000)
Keywordsプラズマ乱流 / 乱流遷移 / 分岐現象 / 確率統計理論 / 遷移確率 / 多スケール乱流 / 非線形現象
Research Abstract

強い揺らぎのあるプラズマ乱流の統計力学を創始して、統計理論を構築する事を目指している。特に本研究では、乱流遷移の確率統計理論に重点を置いている。プラズマで分岐現象がある場合には、新しい未知の物理を開拓できる重要な方法論となる。
従来、"繰り込み理論"の手法を用いて、非線形効果を取り込み遠非平衡・散逸系における自己維持型の"プラズマ電磁乱流"の理論モデルを提唱してきた。すまわち、1、繰り込み理論によって乱流粘性をとりいれた「決定論的」な定式化、次に2、乱雑項を取り入れ、確率方程式を定式化、そして3、乱流状態の確率分布関数を求める。4、状態の間の遷移を解析するため遷移率を求め、5、統計平均と決定論的予測との差異を研究する。
昨年度と本年度は、プラズマの自己構造形成(乱流構造)の理論構築、構造分岐とダイナミックスの各論研究(カタストロフィなど)にも研究を進め、亜臨界励起に際しての確率密度分布を解析、確率分布関数に基づく相境界を求めた。実験データ・ベースは統計平均による相境界であることを示した。
ダイナモの研究ではとくに磁場とプラズマの流れ構造が同時に形作られる事、構造形成が乱流抑制を伴っていること、という普遍化を重視して研究を進めレヴュー論文[A.Yoshizawa, S-I.Itoh, K.Itoh, N.Yokoi.:"Dynamo and MHD theory of turbulence suppression" Plasma Phys.Contr.Fusion46(2004)]を発表した。磁場閉じ込めプラズマから惑星の中性流体まで総合的にとらえる研究を進めている。各々について論文にまとめ発表した。(II.研究発表には、16年度の成果を記載。)
統計力学による基盤の重視という側面からは、統計力学の「森理論」によるプラズマ乱流理論の基礎づけの研究を進めた。
なお、当課題の研究内容は、特別推進研究「乱流プラズマの構造形成と選択則の総合的研究」に昇華した。

Report

(3 results)
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (48 results)

All 2004 2003 Other

All Journal Article (8 results) Publications (40 results)

  • [Journal Article] Statistical theory for transition and sustainment of the improved confinement state2004

    • Author(s)
      Sanae-I.Itoh, Kimitaka Itoh, Masatoshi Yagi, Shinichiro Toda
    • Journal Title

      Plasma Physics and Controlled Fusion Vol.46

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Collisional effects on coherent structures of zonal flows and turbulent transport2004

    • Author(s)
      K.Itoh, K.Hallatschek, S.Toda, S-I.Itoh, P.H.Diamond, M.Yagi, H.Sanuki
    • Journal Title

      Plasma Physics and Controlled Fusion Vol.46

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Turbulence spreading into the linearly stable zone and transport scaling2004

    • Author(s)
      T.S.Hahm, P H Diamond, Z.Lin, K.Itoh, S-I.Itoh
    • Journal Title

      Plasma Physics and Controlled Fusion Vol.46

    • Related Report
      2004 Annual Research Report
  • [Journal Article] A variational analysis of flow-reversal condition in a turbulent swirling pipe flow using the bulk-helicity concept2004

    • Author(s)
      Nobumitsu Yokoi, Akira Yoshizawa, Kimitaka Itoh, Sanae-I.Itoh
    • Journal Title

      PHYSICS OF FLUIDS Vol.16,Number 5

      Pages: 1186-1202

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Dynamos and MHD theory of turbulence suppression2004

    • Author(s)
      Akira Yoshizawa, Sanae-I.Itoh, Kimitaka Itoh, Nobumitu Yokoi
    • Journal Title

      Plasma Physics and Controlled Fusion Vol.46

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Excitation of Geodesic Acoustic Mode in Toroidal Plasmas2004

    • Author(s)
      K.Itoh, K.Hallatschek, S.-I.Itoh
    • Journal Title

      Research Report of National Institute for Fusion Science Japan NIFS-795

      Pages: 1-9

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Periodic Change of Solar Differential Rotation2004

    • Author(s)
      S.-I.Itoh, K.Itoh, A.Yoshizawa, N.Yokoi
    • Journal Title

      Research Report of National Institute for Fusion Science Japan NIFS-800

      Pages: 1-6

    • NAID

      110001078469

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Dynamos and MHD Theory of Turbulence Suppression2003

    • Author(s)
      A.Yoshizawa, S.-I.Itoh, K.Itoh, N.Yokoi
    • Journal Title

      Research Report of National Institute for Fusion Science Japan NIFS-788

      Pages: 1-110

    • Related Report
      2004 Annual Research Report
  • [Publications] S.-I.Itoh, K.Itoh, S Toda: "Statistical theory of L-H transition in tokamaks"Plasma Physics and Controlled Fusion. Vol.45. 823-840 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Itoh, S-I.Itoh, F.Spineanu, M.O.Vlad, M.Kawasaki: "On transition in plasma turbulence with multiple scale lengths"Plasma Physics and Controlled Fusion. Vol.45. 911-918 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Itoh, S-I.Itoh, A.Fukuyama, M.Yagi: "Theory of Plasma Turbulence and Structural Formation -Nonlinearity and Statistical View-"Journal of Plasma and Fusion Research. Vol.79, No.6. 608-624 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] S-I.Itoh, K.Itoh, M.Yagi: "Novel Turbulence Trigger for Neoclassical Tearings Mode in Tokamaks"Physica Review Letters. Vol.91, No.4. 045003(1)-045003(4) (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] P.Kaw, S-I.Itoh, K.Itoh, A.Das: "Bifurcation Paradigm-A Short Summary of Discussion at the Workshop on "Self-Organization and Transport in Electromagnetic Turbulence""Journal of Plasma and Fusion Research. Vol.79, No.9. 945-948 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Itoh, S-I.Itoh, S.Toda, N.Yokoi, A.Yoshizawa: "Relaxation of Coaxial Nonneutral Magnetized Plasmas"Journal of Plasma and Fusion Research. Vol.79, No.12. 1297-1301 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Itoh, S-I.Itoh, N.Yokoi, A.Yoshizawa: "On Flow Reversal in Turbulent Swirling Flow"Journal of the Physical Society of Japan. VOl.72, No.11. 2781-2785 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Enn-jin Kim P.H.Diamond, N.Malkov, T.S.Hahm, K.Itoh, S-I.Itoh, et al.: "Non-perturbative models of intermittency in drift-wave turbulence : towards a probabilistic theory of anomalous transport"Institute of Physics Publishing and International Atomic Energy Agency, Nuclear Fusion. 43, No.9. 961-968 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Mitsuhiro Kawasaki, Sanae-I.Itoh, Masatoshi Yagi, Kimitaka Itoh: "Stochastic Transition of a Turbulent Plasma"AIP Conference Proceedings. Vol.669(1). 228-231 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Sanae-I.Itoh, Kimitaka Itoh, Masatoshi Yagi: "Turbulence trigger for neoclassical tearing modes in tokamaks"Plasma Physics and Controlled Fusion. Vol.46. 123-143 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Itoh, S-I.Itoh, F.Spineanu, M.O.Vlad, M.Kawasaki: "On Transition in Plasma Turbulence with Multiple Scale Lengths"Research Report of National Institute for Fusion Science Japan. NIFS-774. 1-12 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.Vlad, F.Spineanu, K.Itoh, S-I.Itoh: "Intermittent and Global Transition in Plasma Turbulence"Research Report of National Institute for Fusion Science Japan. NIFS-775. 1-16 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] S-I.Itoh, K.Itoh, M.Yagi: "A Novel Turbulence Trigger for Neoclassical Tearing Modes in Tokamaks"Research Report of National Institute for Fusion Science Japan. NIFS-777. 1-9 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] S-I.Itoh, K.Itoh, M.Yagi: "Turbulence Trigger for Neoclassical Tearing Modes in Tokamaks"Research Report of National Institute for Fusion Science Japan. NIFS-782. 1-27 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] F.Spineanu, M.Vlad, K.Itoh, H.Sanuki, S-I.Itoh: "Pole Dynamics for the Flierl-Petviashvili Equation and Zonal Flow"Research Report of National Institute for Fusion Science Japan. NIFS-783. 1-39 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Itoh, K.Hallastschek, S.Toda, H.Sanuki, S-I.Itoh: "Coherent Structure of Zonal Flow and Nonlinear Saturation"Research Report of National Institute for Fusion Science Japan. NIFS-786. 1-9 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] S-I.Itoh, K.Itoh, M.Yagi, S.Toda: "Statistical Theory for Transition and Long-time Sustainment of Improved Confinement State"Research Report of National Institute for Fusion Science Japan. NIFS-787. 1-9 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] A.Yoshizawa, S-I.Itoh, K.Itoh, B.N.Yokoi: "Dynamo and MHD theory of turbulence suppression"Plasma Physics and Controlled Fusion. (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] U.Stroth, K.Itoh, S.-I.Itoh et al.: "Internal Transport Barriers in W7-AS"J. Plasma Fusion Res. SERIES. Vol.4. 43-47 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] A.Fujisawa, H.Iguchi, T.Minami, Y.Yoshimura, K.Tanaka, K.Itoh, M.Kojima, S.-I.Itoh, et al.: "Dynamic Behavior Caused by Bifurcation Property of Radial Electric Field in a Toroidal Helical Plasma of CHS"J. Plasma Fusion Res. SERIES. Vol.4. 54-60 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Itoh, H.Sanuki, S.Toda, M.Yokohama, S.-I.Itoh, et al.: "Electric Field Domain Interface in Helical Systems"J. Plasma Fusion Res. SERIES. Vol.4. 447-450 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.-I.Itoh, Y.Kawai, M.Yagi: "Boundary Condition May Change Chaos"J. Plasma Fusion Res. SERIES. Vol.4. 583-586 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.-I.Itoh, K.Itoh, M.Yagi, M.Kawasaki, et al.: "Transition in multiple-scale-lengths turbulence in plasmas"Physics of Plasmas. Vol.9・No.5. 1947-1954 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] A.Furuya, S.-I.Itoh, M.Yagi: "Effect of Microscopic Turbulence on Magnetic Island"Journal of the Physical Society of Japan. Vol.71・No.5. 1261-1267 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Kawasaki, S.-I.Itoh, M.Yagi, K.Itoh: "Stochastic Transition between Turbulent Branch and Thermodynamic Branch of an Inhomogeneous Plasma"Journal of the Physical Society of Japan. Vol.71・No.5. 1268-1273 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Itoh, S.-I.Itoh: "Transient response of transport at transport barrier formation"Plasma Physics and Controlled Fusion. Vol.44・Supplement5A. A367-A372 (2002)

    • Related Report
      2002 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. Vol.44・Supplement5A. A473-A478 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.-I.Itoh, A.Kitazawa, M.Yagi, K.Itoh: "Bifurcation and phase diagram of turbulence constituted from three different scale-length modes"Plasma Physics and Controlled Fusion. Vol.44・No.7. 1311-1328 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.-I.Itoh, K.Itoh, S.Toda: "Probability of Statistical L-H Transition in Tokamaks"Physical Review Letters. Vol.89・No.21. 215001(1)-215001(4) (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Uchida, A.Fukuyama, K.Itoh, S.-I.Itoh, M.Yagi: "Analysis of current diffusive ballooning mode including kinetic effects"Plasma Phys. Control. Fusion. Vol.44・No.12. 2495-2511 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 伊藤公孝, 伊藤早苗, 矢木雅敏: "揺らぎの非局所性にかかわる理論的背景"Journal of Plasma and Fusion Research. Vol.78・No.9. 857-912 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Okawauchi, S.-I.Itoh, M.Yagi: "Study on MHD and Transport in Burning Plasmas"Reports of Research Institute for Applied Mechanics. Vol.123. 1-19 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.-I.Itoh, K.Itoh, M.Yagi, M.Kawasaki, A.Kitazawa: "Transition in Multiple-scale lengths Turbulence in Plasmas"Research Report of National Institute for Fusion Science Japan. NIFS-725. (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.-I.Itoh, A.Kitazawa, M.Yagi, K.Itoh: "Bifurcation and Phase Diagram of Turbulence Constituted from Three Different Scale-length Modes"Research Report of National Institute for Fusion Science Japan. NIFS-726. (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.-I.Itoh, K.Itoh: "From Dressed Particle to Dressed Mode in Plasmas"Research Report of National Institute for Fusion Science Japan. NIFS-730. (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Yokoyama, K.Itoh, S.Okamura, K.Nakajima, S.-I.Itoh, et al.: "Drift Reversal Capability in Helical Systems"Research Report of National Institute for Fusion Science Japan. NIFS-756. (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] S.-I.Itoh, K.Itoh, S.Toda: "Statistical Theory of L-H Transition in Tokamaks"Research Report of National Institute for Fusion Science Japan. NIFS-771. (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] A.Yoshizawa, S.-I.Itoh, K.Itoh: "PLSMA AND FLUID TURBULENCE Theory and Modelling"Institute of Physics Publishing. 479 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Itoh, S.-I.Itoh, A.Fukuyama, et al.: "Bifurcation Phenomena in Plasmas"Kyusyu University, 2002, Edited by Sanae-I.Itoh and Yoshinobu Kawai. 472 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] J.A.Wesson 編著, 伊藤早苗, 矢木雅敏 共訳: "トカマク概論"財団法人 九州大学出版会. 346 (2003)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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