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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Anomalous ion diffusion and radial-electric-field generation in a turbulent edge plasma potential weakly correlated in time and space
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Anomalous ion diffusion and radial-electric-field generation in a turbulent edge plasma potential weakly correlated in time and space

机译:在时间和空间上弱相关的湍流边缘等离子体电势中的异常离子扩散和径向电场产生

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摘要

Using a simple model of tokamak-edge-plasma turbulence in the form of a spatially periodic and time-independent electrostatic potential, we have found recently a new type of anomalous impurity diffusion in this regime [1], [2]. In the present contribution, we estimate this diffusion in the test-particle approach for a real turbulent potential obtained in an experiment. A significant difference in the impurity dynannics between the Hamiltonian and drift approaches is observed. As an interesting consequence of these dynamics, the possibility of radial-electric-field generation in the turbulence regimes appears. This effect can be of importance in scenarios related to transport barriers.
机译:使用空间周期和时间独立的静电势形式的托卡马克边缘等离子体湍流的简单模型,我们最近发现了在这种情况下的一种新型的异常杂质扩散[1],[2]。在目前的贡献中,我们估计了在试验粒子方法中对于实验中获得的实际湍流势的扩散。观察到哈密顿量法和漂移法之间杂质动力学的显着差异。这些动力学的有趣结果是,在湍流状态下产生径向电场的可能性出现了。在与交通障碍有关的情况下,这种影响可能很重要。

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