Study on the peripheral structure and dynamics of burning plasmas based on both plasma processes and atomic processes

基于等离子体过程和原子过程的燃烧等离子体外围结构和动力学研究

• 批准号: 15560722
• 负责人: KAMADA Yutaka
• 金额: $ 1.41万
• 依托单位: Japan Atomic Energy Research Institute
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560722/
• 关键词: Edge Pedestal Structure; Edge Localized Mode; Neutral particle; Plasma Rotation; Poloidal Beta; H-mode; Tokamak; Nuclear Fusion; 周辺プラズマ構造; 原子分子過程とプラズマ過程; 密度分布; ヘリカル; タンデムミラー; 国際データベース

The purpose of this study is to clarify the structure and dynamics of the 'Edge Pedestal' self-generated at the peripheral region of the tokamak plasmas by the approach of the combined process of plasma processes and atomic processes.Based on the experimental results in JT-60 (Japan Atomic Energy Research Institute), we constructed a wide range of database on the pedestal structure of okamak H-mode plasmas. In addition, we conducted the international comparison experiments between JT-60 and JET(EU). As the results of these studies, 1) we have clarified that the pedestal energy decreases with increasing particle recycling (〜neutral particle density; highly localized around the divertor region) at the same electron density, and 2) found that the toroidal plasma rotation at the edge changes the eigen function and dynamics of the Edge Localized Modes (ELM) and thus the edge pressure gradient determined by ELMs. From these findings, we have clarified that it is essential to include the dist … More ribution of the neutral particles and the plasma rotation in the correlation structure of the physics parameters determining the complex system of the edge pedestal. Furthermore, we have revealed 3) that the pedestal kinetic energy and the edge pressure gradient have a linear positive correlation with the core poloidal beta, and 4) that the inter-ELM transport decreases with the normalized collisionarity. By integrating the above achievements, we have proposed a model of the parameter linkage determining the edge pedestal structure. We also reported these results at the meetings of the International Tokamak Physics Activity(ITPA) Edge and Pedestal Topical Group and provided the data to the international pedestal data base. This Topical Group agreed to proceed this research as one of the high priority research areas in the international collaborative framework. At the same time, in the domestic research activity, it became the central research area in the Fusion Forum Physics Cluster. In particular, since the effects of the neutral particle on the pedestal structure includes the common physics independent of the confinement configuration, the Physics Cluster agreed to construct the database including both tokamak and helical systems. Less

本研究的目的是通过等离子体过程与原子过程相结合的方法，阐明托卡马克等离子体外围区域自生“边缘基座”的结构和动力学。基于JT-60（日本原子能研究所）的实验结果，我们构建了广泛的奥卡马克H型等离子体基座结构数据库。此外，我们还进行了JT-60与JET(EU)的国际对比实验。作为这些研究的结果，1) 我们已经阐明，在相同的电子密度下，基座能量随着粒子回收率的增加而降低（〜中性粒子密度；在偏滤器区域周围高度局域化），2) 发现边缘的环形等离子体旋转改变了边缘局域模式 (ELM) 的本征函数和动力学，从而改变了由 ELM 确定的边缘压力梯度。从这些发现中，我们已经澄清，必须将中性粒子的分布摩擦和等离子体旋转纳入确定边缘基座复杂系统的物理参数的相关结构中。此外，我们还发现3）基座动能和边缘压力梯度与核心极向β呈线性正相关，4）ELM间传输随着归一化碰撞性而减少。通过综合上述成果，我们提出了确定边缘基座结构的参数联动模型。我们还在国际托卡马克物理活动（ITPA）边缘和基座主题小组的会议上报告了这些结果，并将数据提供给国际基座数据库。该专题组同意将这项研究作为国际合作框架中的高度优先研究领域之一进行。同时，在国内研究活动中，它成为Fusion Forum物理集群的中心研究领域。特别是，由于中性粒子对基座结构的影响包括与约束结构无关的常见物理场，物理集群同意构建包括托卡马克和螺旋系统的数据库。较少的

项目成果

Energy loss for grassy ELMs and effects of plasma rotation on the ELM characteristics in JT-60U

• DOI: 10.1088/0029-5515/45/8/014
• 发表时间: 2005-07
• 期刊: Nuclear Fusion
• 影响因子: 3.3
• 作者: N. Oyama;Y. Sakamoto;A. Isayama;M. Takechi;P. Gohil;L. Lao;P. Snyder;T. Fujita;S. Ide;Y. Kamada;Y. Miura;T. Oikawa;T. Suzuki;H. Takenaga;K. Toi

Dimensionless Identity Experiments in JT-60U and JET

JT-60U 和 JET 中的无量纲同一性实验

• 发表时间: 2004
• 期刊: Proc.20th IAEA Fusion Energy Conference IAEA-CN-116
• 作者: G Saibene;N Oyama;Y Andrew;JG Cordey;E de la Luna;C Giroud;K Guenther;T Hatae;GTA Huysmans;Y Kamada;MAH Kempenaars;A Loarte;J Lonnroth;D McDonald;A Meiggs;MFF Nave;V Parail;R Sartori;S Sharapov;J Stober;T Suzuki;M Takechi;K Toi;H Ur
• 通讯作者: H Ur

Pedestal Characteristics of H-mode Plasmas in JT-60U and ASDEX Upgrade

JT-60U 和 ASDEX 升级中 H 模式等离子体的基座特性

• 发表时间: 2005
• 期刊: Journal of Plasma and Fusion Research 81
• 作者: H.Urano;Y.Kamada;T.Takizuka;W.Suttrop;L.D.Horton;P.Lang;H.Kubo;N.Oyama;H.Takenaga;N.Asakura
• 通讯作者: N.Asakura

Fast dynamics of type I ELMs and transport of the ELM pulse in JT-60U

• DOI: 10.1088/0029-5515/44/5/002
• 发表时间: 2004-05
• 期刊: Nuclear Fusion
• 影响因子: 3.3
• 作者: N. Oyama;N. Asakura;A. Chankin;T. Oikawa;M. Sugihara;H. Takenaga;K. Itami;Y. Miura;Y. Kamada-Y.-Kamad

Impact of toroidal rotation on ELM behavior in the H-mode on JT-60U.

环形旋转对 JT-60U 上 H 模式下 ELM 行为的影响。

• 发表时间: 2004
• 期刊: Plasma Physics and Controlled Fusion 46
• 作者: K.;Hanada;T.;Sugata;K.;Sasaki;H.;Zushi;K.;Nakamura;K.N.;Sato;M.;Sakamoto;H.;Idei;M.;Hasegawa;S.;Kawasaki;H.;Nakashima;A.;Higashijima;TRIAM group;Ng et al.;Y.Sakamoto et al.
• 通讯作者: Y.Sakamoto et al.