The goal of this article is to describe processes linked to energy confinement in tokamak plasmas from the perspective of self-organization—the main process that determines the behavior of turbulent plasmas. In the paper Razumova et al 2020 Plasma Phys. Rep. 46 337, such an analysis was performed for regimes without transport barriers. The present paper extends this approach to regimes with barriers and magnetic islands. In a shorter version, it was presented in Razumova et al 2020 Entropy 22 53, which showed that the appearance of islands in the inner part of the barrier is directly related to the formation of the barrier and limits its growth. We discuss the structure of the radial heat flux that carries energy from the plasma in such a way that the pressure profile remains close to the self-consistent profile (as observed in the experiment).

本文的目的是从自组织的角度描述与托卡马克等离子体中的能量限制相关的过程——这是决定湍流等离子体行为的主要过程。在 Razumova等人2020 Plasma Phys 的论文中。Rep. 46 337，对没有运输障碍的制度进行了这样的分析。本论文将这种方法扩展到具有屏障和磁岛的机制。在较短的版本中，它在 Razumova等人2020 Entropy 22 中提出53，这表明屏障内部岛屿的出现与屏障的形成直接相关并限制了其生长。我们讨论了从等离子体携带能量的径向热通量的结构，使压力分布保持接近自洽分布（如实验中观察到的）。