论文标题
通过杂质辐射触发撕裂不稳定，通过电阻互换逆转在tokamak中
Triggering of tearing instability by impurity radiation through resistive interchange reversal in a tokamak
论文作者
论文摘要
最近的MHD模拟发现，由于杂质辐射冷却而导致的局部电阻互换参数$ d_r $从负到正的逆转，能够触发高于杂质水平阈值的Tokamak的电阻撕裂模式的增长。杂质辐射也诱导了一层扰动的Pfirsch-Schlüter电流密度和电阻率，这进一步控制了非线性阶段的撕裂模式的生长和饱和度。杂质阈值和撕裂模式的生长在很大程度上取决于平行的热导率，而这种依赖性源于沿着螺旋磁场线的快速平行热平衡对$ d_r $的影响。
Recent MHD simulations find that the reversal of the local resistive interchange parameter $D_R$ from negative to positive due to impurity radiation cooling is able to trigger the resistive tearing mode growth in a tokamak above a threshold in impurity level. A layer of perturbed Pfirsch-Schlüter current density and resistivity are also induced by the impurity radiation, which further govern the tearing mode growth and saturation in the nonlinear stage. The impurity threshold and the tearing mode growth strongly depend on the parallel thermal conductivity, and such a dependence derives from the impact on $D_R$ of the fast parallel thermal equilibration along the helical magnetic field lines.
