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MHD Instabilities in Current Carrying Heliotron Plasmas

机译:当前携带的日光加速器等离子体中的MHD不稳定性

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Instabilities in low beta l = 2 heliotron plasmas with peaked toroidal current density profiles are investigated using resistive reduced magnetohydrodynamic equations. Such heliotron plasmas can have a nonmonotonic rotational transform ? profile with two ? = 2/3 rational surfaces. When the distance between the resonant surfaces is large, resistive instabilities can be found. Current-driven ideal modes with larger growth rates appear when the minimum of the rotational transform becomes just above the rational number 2/3 and there is no resonant surface. The existence of this non-resonant mode is explained by the expression for the current-driven term of the plasma potential energy.
机译:使用电阻降低的磁流体动力学方程,研究了具有峰值环形电流密度分布的低β1 = 2日光子等离子体中的不稳定性。这样的日光子等离子体可以具有非单调的旋转变换吗?配置文件有两个? = 2/3有理曲面。当谐振表面之间的距离较大时,可以发现电阻不稳定性。当旋转变换的最小值刚好在有理数2/3之上并且没有共振表面时,出现了具有较大增长率的电流驱动理想模式。通过等离子势能的电流驱动项的表达式解释了这种非谐振模式的存在。

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