In this paper, we analyze the impact of electron cyclotron resonance heating and electron cyclotron current drive on the Alfvnic instabilities driven by neutral beam injection observed in the TJ-II stellarator. An MHD stability analysis of driven Alfvn eigenmodes compatible with the experimental plasma parameters is carried out in order to compare with the data provided by magnetic coils, radiation monitors, and heavy ion beam probes. To this end, the vacuum magnetic configuration modified by the different levels of plasma current, the thermal plasma parameters and the fast ion pressure profiles generated by the co-injected neutral beam, are entered in the FAR3d gyro-fluid code in order to follow the linear evolution of the destabilized plasma equilibrium. Linear growth rates and radial location of the dominant predicted modes coincident in frequency with the observed fluctuations are presented. Despite the uncertainties related to the estimation of the rotational transform profile, the code predictions agree within reasonable accuracy with the experimental results.

在本文中，我们分析了电子回旋共振加热和电子回旋电流驱动对 TJ-II 仿星器中观察到的中性束注入驱动的 Alfvnic 不稳定性的影响。对与实验等离子体参数兼容的驱动 Alfvn 特征模式进行 MHD 稳定性分析，以便与磁线圈、辐射监视器和重离子束探测器提供的数据进行比较。为此，在 FAR3d 陀螺流体代码中输入了由不同级别的等离子体电流、热等离子体参数和共注入中性束产生的快速离子压力分布修改的真空磁性配置，以便遵循不稳定的等离子体平衡的线性演变。呈现了在频率上与观察到的波动一致的主要预测模式的线性增长率和径向位置。尽管与旋转变换轮廓的估计有关的不确定性，代码预测与实验结果在合理的准确度内一致。