论文标题
由失控电子激发的压缩alfvén本特征模
Compressional Alfvén eigenmodes excited by runaway electrons
论文作者
论文摘要
在磁融合实验中已经观察到了由能量离子驱动的压缩抗藻本征（CAE）。在本文中，我们表明，模式也可以由干扰后血浆中形成的失控电子驱动，这可以解释在大量气体注入的DIII-D破坏实验中观察到的动力学不稳定性。计算模式结构，以及与实验观测一致的频率。使用从动力学模拟获得的失控电子分布函数，计算模式增长率并发现当失控的电子密度超过阈值时，将超过碰撞阻尼速率。 CAE的激发提出了一种新的可能方法，可以减轻当前淬火期间种子失控电子并超过雪崩。
Compressional Alfvén eigenmodes (CAE) driven by energetic ions have been observed in magnetic fusion experiments. In this paper, we show that the modes can also be driven by runaway electrons formed in post-disruption plasma, which may explain kinetic instabilities observed in DIII-D disruption experiments with massive gas injection. The mode-structure is calculated, as are the frequencies which are in agreement with experimental observations. Using a runaway electron distribution function obtained from a kinetic simulation, the mode growth rates are calculated and found to exceed the collisional damping rate when the runaway electron density exceeds a threshold value. The excitation of CAE poses a new possible approach to mitigate seed runaway electrons during the current quench and surpassing the avalanche.
