The linear magnetohydrodynamic stability of a shielding magnetic flux rope with a surface current under coronal solar conditions is analyzed in the framework of an energy principle. The equation describing the potential energy change induced by disturbances of the equilibrium was derived. It has been shown that the surface reverse current shielding the azimuthal component of the magnetic field lines outside a flux rope stabilizes the development of kinkand flute-type instabilities in the long-wavelength limit independently of the cross-sectional radial profile of current density. Kink modes are the most unstable ones as their generation requires less energy than other modes. Based on the obtained dispersion relation for kink oscillations, we proposed a new expression for the determination of magnetic field components of the twisted loop. Unified Astronomy Thesaurus concepts: Magnetohydrodynamics (1964); Space plasmas (1544)

中文翻译：

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关于扭曲磁通管的稳定性

在能量原理的框架内分析了日冕条件下具有表面电流的屏蔽磁通绳的线性磁流体动力学稳定性。推导出了描述由平衡扰动引起的势能变化的方程。已经表明，表面反向电流屏蔽磁力绳外部的磁力线的方位分量可以稳定长波长极限中扭结凹槽型不稳定性的发展，而与电流密度的横截面径向分布无关。扭结模式是最不稳定的模式，因为它们的生成需要比其他模式更少的能量。基于获得的扭结振荡的色散关系，我们提出了一种用于确定扭曲环磁场分量的新表达式。统一天文学辞典概念：磁流体动力学 (1964)；空间等离子体 (1544)