非平衡プラズマの強相関乱流

非平衡等离子体中的强相关湍流

• 批准号: 15H02155
• 负责人: 伊藤 早苗
• 金额: $ 23.38万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2015
• 资助国家: 日本
• 起止时间: 2015 至 2019
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15H02155/
• 关键词: プラズマ乱流; 複数駆動源; 強相関; 乱流競合過程; 乱流構造; 圧力と流速の勾配; 強相関乱流; 非平衡プラズマ

本研究計画は、複数の非平衡性源を持つプラズマに発現するプラズマ乱流構造を「強相関乱流プラズマ」と定義し、多種の干渉しあう非線形過程を通じて生じる巨視的構造形成について研究する事を目的とする。実空間・位相空間・外部入力の非平衡性駆動源を視野に入れる。実験検証も視野に入れ、プラズマ乱流の新たな描像を提示する事を目指し、成果を広く発信するべく、研究計画を構成している。今年度までの研究により成果が充実し、強相関乱流の性質や実験による確認法等の研究が大きく進んだ。本年度は最終年度に当たる。個別の研究発展だけでなく、全体の成果を体系的に世に問うことを重視して研究を推進した。二つの点に焦点を絞り論述する。(1)まず、本研究によって、従来未解決とされて来た多くの課題に解決の端緒を提供した。具体的な例の一部をあげる。大型磁場閉じ込め装置のH-modeプラズマでは、type-III ELMs (edge localized modes)と呼ばれる崩壊現象が知られて来たがその機構は理解できていない。本研究により、輸送障壁での強い電場勾配に起因して磁力線方向の速度に不均一が生じ、速度勾配駆動不安定性が起きることを予言して来た。本研究で指摘したこの過程が、Type-III ELMsの機構の重要な要素と考え、実験結果とともに仮説として提案し広く学界に示している。また、粒子供給の変化による改善現象も謎とされて来たが、本理論描像で理解できるとの仮説を提示し、今後の詳細な実験実証を待つ。(2)今までの研究成果の全体像を取りまとめ、世に問うための総合報告『プロジェクトレビュー「非平衡プラズマの強相関乱流」』の原稿執筆をおこなった。今後機会を見て出版する。代表者の早世という予期せぬ不幸に見舞われ今年度中途に終了ということになったが、当初の提案に掲げた研究成果を上げることができた。

In this study, non-balanced and complex data sources are used to determine the definition of "strong phase turbulence", and a variety of non-linear processes are used to produce giant televisions. the purpose of this study is to achieve the purpose of research. The external input force in the space phase space is not balanced. The source field enters the station. The new images of the wild, the turbulence, the images, the objectives, the results, and the research plans. This year, there has been a lot of progress in the study, such as the results of the research and the determination of the results of the study. This year will be the most popular of the year. Special attention is paid to the promotion of research and development in the world of the research exhibition and the overall results system. The second point is to focus on the focus and to describe the situation. The main contents of this study are as follows: (1) in this study, we have not solved the problems in the past few years. There is a specific example of this. Large-scale magnetic equipment, H-mode equipment, type-III ELMs (edge localized modes) equipment, equipment and equipment. In this study, the reason why the magnetic field is not uniform in the direction of the magnetic force line, and the instability of the speed matching is caused by the dynamic instability of the transmission barrier. The purpose of this study is to criticize the important factors in the process and Type-III ELMs institutions, and the results show that the academic community has demonstrated its importance in the field of education. In order to improve the quality of the system, the theory is based on the understanding of the prompt, and the future is waiting for you. (2) all the current research results are like the comprehensive report of the current research results, such as the comprehensive report of the current research results, the comprehensive report of the current research results, the comprehensive report of the current research results, the comprehensive report of the current research results, the current research results, the current research results and the current research results. In the future, the opportunity will be held to publish the book. The representative, "early life", "unlucky", "dance", "in the middle of this year," the representative "early life", "unfortunately", "dance", "in the middle of this year," in the middle of this year, the representative "early life", "unlucky", "dance", "in the middle of this year," in the middle of this year, the proposal was proposed.

项目成果

Comparison of Conditional Average Using Threshold and Template Methods for Quasi-Periodic Phenomena in Plasmas

使用阈值法和模板法对等离子体准周期现象进行条件平均的比较

• DOI: 10.1585/pfr.14.1402114
• 发表时间: 2019
• 期刊: Plasma and Fusion Research
• 影响因子: 0.8
• 作者: KIN Fumiyoshi;ITOH Kimitaka;HAPPEL Tim;BIRKENMEIER Gregor;FUJISAWA Akihide;INAGAKI Sigeru;ITOH Sanae-I.;STROTH Ulrich;ASDEX Upgrade Team
• 通讯作者: ASDEX Upgrade Team

Hysteresis and Fast Timescale in Transport Relation of Toroidal Plasmas

环形等离子体输运关系中的滞后和快时标

• DOI: 10.1088/1741-4326/aa796a
• 发表时间: 2017
• 期刊: Nuclear Fusion
• 影响因子: 3.3
• 作者: K. Itoh;S.-I. Itoh;K. Ida;S. Inagaki;Y. Kamada;K. Kamiya;J. Dong;C. Hidalgo;T. Evans;W. Ko;H. Park;T. Tokuzawa;S. Kubo;T. Kobayashi;Y. Kosuga;M. Sasaki;G. Yun;S. Song;N. Kasuya;Y. Nagashima;C. Moon;M. Yoshinuma;R. Makino;T. Tsujimur
• 通讯作者: T. Tsujimur

Turbulence Simulation on Zonal Flow Formations in the Presence of Parallel Flows

平行流存在下层流形成的湍流模拟

• DOI: 10.1585/pfr.14.1401161
• 发表时间: 2019
• 期刊: Plasma and Fusion Research
• 影响因子: 0.8
• 作者: SASAKI Makoto;KASUYA Naohiro;KOSUGA Yusuke;KOBAYASHI Tatsuya;YAMADA Takuma;ARAKAWA Hiroyuki;INAGAKI Shigeru;ITOH Kimitaka
• 通讯作者: ITOH Kimitaka

Observation of the inward propagation of spontaneous toroidal flow from the plasma boundary in LHD

LHD 中等离子体边界自发环形流向内传播的观察

• DOI: 10.1063/1.4965908
• 发表时间: 2016
• 期刊: Physics of Plasmas
• 影响因子: 2.2
• 作者: K. Kamiya;K. Ida;K. Itoh;S.-I. Itoh;M. Yoshinuma;M. Yokoyama;S. Kubo;H. Tsuchiya;N. Tamura;S. Masuzaki;C. Suzuki;T. Akiyama and LHD experiment group
• 通讯作者: T. Akiyama and LHD experiment group

Flow helicity : could it be useful for fusion?

流螺旋度：它对融合有用吗？

• 发表时间: 2019
• 作者: Y. Kosuga;M. Sasaki;Z. B. Guo;A. Fujisawa;S. Inagaki;K. Terasaka;F. Kin;T. Kobayashi;K. Itoh;S. -I. Itoh;P. H. Diamond
• 通讯作者: P. H. Diamond