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Resonant influence of helicity on Alfven heating of plasma in stellarators

机译：螺旋度对恒星在Alfven等离子体中加热的共振影响

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摘要

The distribution of antenna-driven fields of electromagnetic waves in the local Alfven resonance (AR) region is studied under resonant conditions, when the axial period of the fundamental harmonics of magnetohydrodynamic oscillations in the axial direction is twice as large as the pitch length, and the poloidal number of the fundamental harmonics is twice as small as the polarity of the helical coils. It is shown that taking into account the helical inhomogeneity of the steady magnetic field can remove infinite discontinuity of the wave fields, which is present in the case of a straight confining magnetic field, rather than electron inertia or finite ion Larmor radius. Radio frequency power absorption within the local AR is compared with the case when AR structure is governed by electron inertia or finite ion Larmor radius. Another approach is proposed to explain the helicity induced gap in the Alfven continuum. [References: 17]
机译：在共振条件下，当磁流体动力振荡的基本谐波的轴向周期在轴向方向上的轴向周期是节距长度的两倍大时，研究了在局部Alfven谐振（AR）区域中电磁波的天线驱动场的分布，并且基波的极点数是螺旋线圈极性的两倍。结果表明，考虑到稳定磁场的螺旋不均匀性，可以消除无限大的波场不连续性（在直的封闭磁场中），而不是电子惯性或有限的离子拉莫尔半径。将局部AR内部的射频功率吸收与AR结构受电子惯性或有限离子拉莫尔半径控制的情况进行比较。提出了另一种方法来解释Alfven连续体中由螺旋度引起的缺口。 [参考：17]

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