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

本文以日本原子能研究所JT-60实验结果为基础，采用等离子体过程和原子过程相结合的方法研究了托卡马克H模等离子体边缘区边缘基座的结构和动力学，建立了一个广泛的托卡马克H模等离子体基座结构数据库。此外，还进行了JT-60与JET（欧盟）的国际比对试验。作为这些研究的结果，1）我们已经澄清，基座能量随着粒子再循环的增加而减少（中性粒子密度;高度局限于偏滤器区域周围）在相同的电子密度，和2）发现，在边缘的环形等离子体旋转改变本征函数和动力学的边缘局域模（ELM），从而边缘压力梯度由ELM确定。从这些发现中，我们已经阐明， 关于我们 中性粒子的分布和等离子体的旋转在决定边缘基座复杂系统的物理参量的关联结构中的作用。此外，我们还揭示了3）基座动能和边缘压力梯度与地核极向β具有线性正相关关系，以及4）ELM间输运随归一化碰撞度的减小而减小。综合上述研究成果，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）边缘和基座专题组会议上报告了这些结果，并将数据提供给国际基座数据库。该专题小组同意将这项研究作为国际合作框架中的一个高度优先研究领域。与此同时，在国内的研究活动中，它也成为了聚变论坛物理组的中心研究领域。特别是，由于中性粒子对基座结构的影响包括独立于约束配置的共同物理，物理学集群同意构建包括托卡马克和螺旋系统的数据库。少

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