Abstract

The cumulative impact of the inhomogeneous distribution of the plasma temperature and electromagnetic effects on dynamics of plasma filaments in the hot edge plasma of a tokamak, characterized by small values of the parameter \(\beta < {{m}_{e}}{\text{/}}{{m}_{i}}\), is analyzed. The physical model describing the filament dynamics is presented. Estimates of the scrape-off-layer plasma parameters, for which electromagnetic and temperature effects can have a substantial impact on the filament dynamics in conditions of the low ratio of the plasma pressure to the pressure of the magnetic field, are obtained. The model equations are used for three-dimensional simulations of the macroscopic motion of filaments in plasma, the parameters of which are similar to the parameters of the peripheral plasma of the tokamak T-15MD, for different types of the spatial distribution of the electron temperature inside the filaments. It is shown that simultaneously taking electromagnetic and temperature effects into account can lead to a considerable departure of the filament trajectories of motion from those in the electrostatic case.

中文翻译：

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电磁效应和不均匀温度分布对托卡马克边缘等离子体丝动力学的累积影响

摘要

等离子体温度和电磁效应的不均匀分布对托卡马克热边缘等离子体中等离子体细丝动力学的累积影响，其特征在于参数\（\ beta <{{m} _ {e}} { \ text {/}} {{m} _ {i}} \），进行分析。介绍了描述灯丝动力学的物理模型。获得了刮除层等离子体参数的估计值，在等离子体压力与磁场压力的比率较低的情况下，电磁和温度效应可能会对刮除层等离子体参数产生重大影响。模型方程用于等离子体中灯丝宏观运动的三维模拟，其参数类似于托卡马克T-15MD外围等离子体的参数，用于电子温度的不同类型空间分布在细丝里面。