论文标题
具有失控电子的电阻模式的结构和过度稳定
Structure and overstability of resistive modes with runaway electrons
论文作者
论文摘要
我们研究了失控电子电流对托卡马克斯中电阻磁流体动力模式的分散关系的影响。我们提出了一个新的理论模型来得出分散关系，该模型基于对模式的电阻层结构的渐近分析。发现除了传统的电阻层外，新的失控电流层可以出现，其性质取决于alfvén速度与失控电子对流速度的比率。由于该层的贡献，除增长速率外，撕裂模式和扭结模式都将具有实际频率。使用简化的特征值计算和M3D-C1线性仿真，将派生的色散关系与数值结果进行了比较，并且在两种情况下都发现了良好的一致性。
We investigate the effects of runaway electron current on the dispersion relation of resistive magnetohydrodynamic modes in tokamaks. We present a new theoretical model to derive the dispersion relation, which is based on the asymptotic analysis of the resistive layer structure of the modes. It is found that in addition to the conventional resistive layer, a new runaway current layer can emerge whose properties depend on the ratio of the Alfvén velocity to the runaway electron convection speed. Due to the contribution from this layer, both the tearing mode and kink mode will have a real frequency in addition to a growth rate. The derived dispersion relation has been compared with numerical results using both a simplified eigenvalue calculation and a M3D-C1 linear simulation, and good agreement is found in both cases.
