Comprehensive linear stability studies of resistive modes are presented for Wendelstein 7-X-type stellarator equilibria with electron cyclotron current drive (ECCD). The external co-current drive leads to an increase of the rotational transform and the formation of one or two ι = 1 rational flux surfaces. Using the 3D linear stability CASTOR3D code, low n * -type resistive modes ( n * = 1,2...,8 with n * being the dominant toroidal Fourier harmonic contributing to the mode) are investigated. We studied the dependence of their growth rates on plasma resistivity, parallel viscosity, and shape of the rotational transform profile (especially various distances between two ι = 1 flux surfaces). Similarly to tokamak configurations, single and double tearing modes, and internal resistive kink modes are found. In addition, modes oscillating between two n * -types of the same mode family are observed. The f...

中文翻译：

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具有外部电流驱动的Wendelstein 7-X型平衡的线性电阻稳定性研究

针对具有电子回旋加速器电流驱动（ECCD）的Wendelstein 7-X型恒星器平衡，提出了电阻模式的全面线性稳定性研究。外部并流驱动导致旋转变换的增加以及一个或两个1 = 1有理通量表面的形成。使用3D线性稳定性CASTOR3D代码，研究了低n *型电阻模式（n * = 1,2 ...，8，其中n *是对该模式做出贡献的主要环形傅立叶谐波）。我们研究了它们的生长速率对等离子体电阻率，平行粘度和旋转变换轮廓的形状（尤其是两个ι= 1磁通量表面之间的不同距离）的依赖性。与托卡马克配置类似，可以找到单撕裂模式和双撕裂模式以及内部电阻扭结模式。此外，观察到在相同模式族的两个n *-型之间振荡的模式。那个...