非平衡プラズマ物理学のための乱流計測シミュレータ研究

2015 Fiscal Year Annual Research Report

• Project/Area Number: 23244113
• Research Institution: National Institute for Fusion Science
• Principal Investigator: 伊藤 公孝 核融合科学研究所, ヘリカル研究部, 教授 (50176327)
• Co-Investigator(Kenkyū-buntansha): 糟谷 直宏 九州大学, 応用力学研究所, 准教授 (20390635) ; 村上 定義 京都大学, 工学(系)研究科(研究院), 准教授 (40249967) ; 登田 慎一郎 核融合科学研究所, ヘリカル研究部, 准教授 (60332186)
• Project Period (FY): 2011-04-01 – 2016-03-31
• Keywords: プラズマ乱流 / 乱流輸送 / 乱流計測シミュレーター / 動的応答

Outline of Annual Research Achievements

本研究では、乱流計測シミュレータが、大域的非線形ダイナミクスの本質的な過程を見いだすための研究方法論となる事を実証し、非平衡プラズマの物理に新しい進展をもたらすことを目指している。
平成27年度は最終年度であり、全体計画に沿って研究をとりまとめた。
乱流計測シミュレータによる動的輸送応答実験観測への寄与を取りまとめ、実験観測に具体的に適用した。位相イメージコントラスト法と呼ばれる乱流計測法について検討した。通常、視線積分のデータをもとに実空間分布が推定されているが、推定の誤差（曖昧さ）が通常信じられているより大きいことを示し、乱流の解釈に基軸を示した。また、プラズマの大域的な非平衡ダイナミックスについて考察を深め、通常はミクロ・メゾ・マクロと分離されて議論されている物理過程が、スケールの差を超えて直接相互作用するクロススケールの考え方も示した。この成果を、輸送界面や速度空間構造と乱流輸送の相互作用の研究へと統合し、その結果、通常は滑らかと仮定されている分布に細かな凹凸が自律的に生まれ、それが大域的な輸送現象に大きな影響を与えることを示した。さらに、H-モード輸送障壁のスケーリング則を導いている。乱流の塊の間欠的移送についても、観測可能性を前年度までに示し、具体的な観測も先導した。先進データ解析法と実験検証では、JT-60U, JFT-2M, LHD,基礎実験装置PANTA,中国西南物理学研究所HL-2A,などの実験を対象に揺動解析国際共同作業ワークショップを開催し、結果を取りまとめた。
これらの成果を5th Asia Pacific Transport Working Group (天津)、ヨーロッパ物理学会、Plasma Edge Theory国際会議（奈良）、日本物理学会、プラズマ核融合学会、国際土岐会議などで発表し、成果を取りまとめ多数の論文を出版した。

Research Progress Status

27年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

27年度が最終年度であるため、記入しない。

Research Products

• [Int'l Joint Research] SWIP(中国)
  • Country Name: CHINA
  • Counterpart Institution: SWIP
• [Int'l Joint Research] Culham Laboratory/Warwick University(英国)
  • Country Name: UNITED KINGDOM
  • Counterpart Institution: Culham Laboratory/Warwick University
• [Int'l Joint Research] Aix-Marseille University/University of Lorraine(フランス)
  • Country Name: FRANCE
  • Counterpart Institution: Aix-Marseille University/University of Lorraine
• [Int'l Joint Research] UCSD/General Atomics(米国)
  • Country Name: U.S.A.
  • Counterpart Institution: UCSD/General Atomics
• [Int'l Joint Research] Max-Planck-Institute for Plasma Physics(ドイツ)
  • Country Name: GERMANY
  • Counterpart Institution: Max-Planck-Institute for Plasma Physics
• [Int'l Joint Research]
  • # of Other Countries: 3
• [Journal Article] On the study of higher harmonics of heat pulse propagation in the modulated-heating experiments (2016)
  • Author(s): K. Itoh, S.-I. Itoh, S. Inagaki, N. Kasuya, A. Fujisawa
  • Journal Title: Journal of the Physical Society of Japan Volume: 85 Pages: 014501(-1,-6)
  • DOI: http://doi.org/10.7566/JPSJ.85.014501
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] A structural bifurcation of transport in toroidal plasmas (2016)
  • Author(s): K. Itoh and S.-I. Itoh
  • Journal Title: Plasma Phys. Control. Fusion Volume: 58 Pages: 045017 (-1, -7)
  • DOI: 10.1088/0741-3335/58/4/045017
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] A Calibration of Setting of Mach Probes by Observing GAM Oscillations (2016)
  • Author(s): K. Itoh, K. J. Zhao, J. Q. Dong, S.-I. Itoh, A. Fujisawa, S. Inagaki, M. Sasaki, Y. Nagashima, Y. Kosuga, J. Cheng, T. Kobayashi
  • Journal Title: Plasma Fus. Research Volume: 11 Pages: 1402002(-1,-4)
  • DOI: 10.1585/pfr.11.1402002
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] On the origin of steep and localized radial electric field in the transport barrier at plasma edge (2016)
  • Author(s): K. Itoh, S.-I. Itoh, T. Kobayashi, K. Kamiya, T. Ido, T. Tokuzawa, S. Inagaki, N. Kasuya
  • Journal Title: Contrib. Plasma Phys. Volume: - Pages: -
  • DOI: 10.1002/ctpp.201610042
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Onset condition of the subcritical geodesic acoustic mode instability in the presence of energetic-particle-driven geodesic acoustic mode (2016)
  • Author(s): K. Itoh, S.-I. Itoh, Y. Kosuga, M. Lesur, and T. Ido
  • Journal Title: Phys. Plazmy Volume: 42 Pages: 428-433
  • DOI: 10.7868/S036729211605005X
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Approaches to Hysteresis of Transport Relation in Toroidal Plasmas (2016)
  • Author(s): Sanae-I. Itoh, Shigeru Inagaki, J. Q. Dong, Kimitaka Itoh
  • Journal Title: Plasma Fus. Research Volume: 11 Pages: 2503086(-1,-7)
  • DOI: 10.1585/pfr.11.2503086
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Nonlinear excitation of subcritical instabilities in a toroidal plasma (2016)
  • Author(s): M. Lesur, K. Itoh, T. Ido, M. Osakabe, K. Ogawa, A. Shimizu, M. Sasaki, K. Ida, S. Inagaki, S.-I Itoh, and the LHD experiment group
  • Journal Title: Phys. Rev. Lett. Volume: 116 Pages: 015003(-1,-4)
  • DOI: 10.1103/PhysRevLett.116.015003
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Nonlinear excitation of subcritical fast ion-driven modes (2016)
  • Author(s): M. Lesur, K. Itoh, T. Ido, S.-I. Itoh, Y. Kosuga, M. Sasaki, S. Inagaki, M. Osakabe, K. Ogawa, A. Shimizu, K. Ida
  • Journal Title: Nuclear Fusion Volume: 56 Pages: 056009(-1,-14)
  • DOI: 10.1088/0029-5515/56/5/056009
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] A Concept of Cross-Ferroic Plasma Turbulence (2016)
  • Author(s): S. Inagaki, T. Kobayashi, Y. Kosuga, S.-I. Itoh, T. Mitsuzono, Y. Nagashima, H. Arakawa6, T. Yamada, Y. Miwa, N. Kasuya, M. Sasaki, M. Lesur, A. Fujisawa, K. Itoh
  • Journal Title: Scientific Reports Volume: 6 Pages: 22189(-1,-6)
  • DOI: 10.1038/srep22189
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Ion internal transport barrier in neutral beam heated plasmas on HL-2A (2016)
  • Author(s): Yu, Deliang; Wei, Yanling; Liu, Liang; Dong, Jiaqi; Ida, Katsumi; Itoh, Kimitaka; et al.
  • Journal Title: Nucl. Fusion Volume: 56 Pages: 056003(-1,-8)
  • DOI: 10.1088/0029-5515/56/5/056003
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Flux of parallel flow momentum by parallel shear flow driven Instability (2016)
  • Author(s): Yusuke KOSUGA, Sanae-I. ITOH, and Kimitaka ITOH
  • Journal Title: Plasma Fusion Res. Volume: 11 Pages: 1203018(-1,-3)
  • DOI: 10.1585/pfr.11.1203018
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] On the spatial structure of solitary radial electric field at the plasma edge in toroidal confinement devices (2015)
  • Author(s): Itoh, Kimitaka; Itoh, Sanae-I; Kamiya, Kensaku; Kasuya, Naohiro
  • Journal Title: Plasma Phys. Control. Fusion Volume: 57 Pages: 075008 (-1, -7)
  • DOI: 10.1088/0741-3335/57/7/075008
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Contribution of Geodesic Acoustic Modes in the Limit Cycle Oscillation near H-mode Transition in JFT-2M Plasmas (2015)
  • Author(s): K. Itoh, K. Kobayashi, T. Ido, S.-I. Itoh, K. Kamiya
  • Journal Title: Plasma Phys. Control. Fusion Volume: 57 Pages: 092001(-1, -3)
  • DOI: 10.1088/0741-3335/57/9/092001
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] A Parameter that Denotes Non-Equilibrium Property for Turbulent Plasmas (2015)
  • Author(s): Kimitaka ITOH and Sanae-I. ITOH
  • Journal Title: Plasma Fusion Res. Volume: 10 Pages: 3401027(-1 -4)
  • DOI: 10.1585/pfr.10.3401027
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Self-regulated oscillation of transport and topology of magnetic islands in toroidal plasmas (2015)
  • Author(s): K. Ida, T. Kobayashi, T. E. Evans, S. Inagaki, M. E. Austin, M. W. Shafer, S. Ohdachi, Y. Suzuki, S.-I. Itoh & K. Itoh
  • Journal Title: Scientific Reports Volume: 5 Pages: 16165(-1,-10)
  • DOI: 10.1038/srep16165
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Simulation Study of Hysteresis in the Gradient-Flux Relation in Toroidal Plasma Turbulence (2015)
  • Author(s): Kasuya, N; Sugita, Satoru; Inagaki, Shigeru; Itoh, Kimitaka; Yagi, Masatoshi; Itoh, Sanae-I:
  • Journal Title: Plasma Phys. Control. Fusion Volume: 57 Pages: 044010(-1,-8)
  • DOI: 10.1088/0741-3335/57/4/044010
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Edge plasma dynamics during L-H transition in the JFT-2M tokamak (2015)
  • Author(s): T. Kobayashi, K. Itoh, T.Ido, K. Kamiya, S.-I. Itoh, Y. Miura, Y. Nagashima, A. Fujisawa, S. Inagaki, K. Ida, and K. Hoshino
  • Journal Title: Nucl. Fusion Volume: 55 Pages: 063009(-1,-14)
  • DOI: 10.1088/0029-5515/54/7/073017
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] The effect of beta-induced Alfven eigenmode on L-I-H transitions in the HL-2A tokamak (2015)
  • Author(s): Yan, Longwen; Cheng, Jun; Dong, Jiaqi; Itoh, Kimitaka; Zhao, Kaijun; etc.
  • Journal Title: Nucl. Fusion Volume: 55 Pages: 073026(-1,-7)
  • DOI: doi:10.1088/0029-5515/55/7/073026
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] プラズマの突発現象と遠非平衡性 (2016)
  • Author(s): 伊藤公孝
  • Organizer: 日本物理学会第71回年次大会
  • Place of Presentation: 東北学院大学
  • Year and Date: 2016-03-21
• [Presentation] Detection of Isotope Effect via Hysteresis in Transport Relation (2016)
  • Author(s): K. Itoh
  • Organizer: International Workshop on LHD Deuterium Experiment
  • Place of Presentation: Toki, Japan
  • Year and Date: 2016-02-10
  • Int'l Joint Research
• [Presentation] 理論から乱流プラズマの諸現象（まとめ） (2015)
  • Author(s): 伊藤公孝
  • Organizer: 第32回プラズマ・核融合学会年会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2015-11-27
• [Presentation] Introduction for motivation (2015)
  • Author(s): K. Itoh
  • Organizer: Japan-China Joint Data Analysis Workshop
  • Place of Presentation: Kasuga, Japan
  • Year and Date: 2015-11-12
  • Int'l Joint Research
• [Presentation] Non-equilibrium and Extreme State of Plasmas (2015)
  • Author(s): K. Itoh
  • Organizer: 25th International Toki Conference
  • Place of Presentation: Toki, Japan
  • Year and Date: 2015-11-03
  • Int'l Joint Research / Invited
• [Presentation] Origin and structure formation of solitary electric field in the H-mode (2015)
  • Author(s): K. Itoh
  • Organizer: 15th International Workshop on H-mode Physics and Transport Barriers
  • Place of Presentation: Garching, Germany
  • Year and Date: 2015-10-21
  • Int'l Joint Research
• [Presentation] スケール混合と乱流輸送構造 (2015)
  • Author(s): 伊藤公孝
  • Organizer: 日本物理学会
  • Place of Presentation: 関西大学千里山キャンパス
  • Year and Date: 2015-09-17
• [Presentation] On the origin of steep radial electric field in the transport barrier at plasma edge (2015)
  • Author(s): K. Itoh
  • Organizer: 15th International Workshop on Plasma Edge Theory in Fusion Devices
  • Place of Presentation: Nara, Japan
  • Year and Date: 2015-09-09
  • Int'l Joint Research
• [Presentation] On the spatial structure of solitary radial electric field at the plasma edge in toroidal confinement devices (2015)
  • Author(s): K. Itoh
  • Organizer: The 5th Asia-Pacific Transport Working Group International Conference (APTWG 2015)
  • Place of Presentation: Dalian, China
  • Year and Date: 2015-06-09
  • Int'l Joint Research
• [Funded Workshop] Japan-China Joint Data Analysis Workshop (2015)
  • Place of Presentation: 九州大学 応用力学研究所
  • Year and Date: 2015-11-12 – 2015-11-20