Dissipation and diamagnetic effects on the interchange mode growth rate and rotation in reduced magnetohydrodynamics applied to stellarators
Dissipation and diamagnetic effects on the interchange mode growth rate and rotation in reduced magnetohydrodynamics applied to stellarators
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DOI：
10.1088/0029-5515/56/2/026008
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发表时间：
2016-02
期刊：
影响因子：
3.3
通讯作者：
T. Nicolas;K. Ichiguchi
中科院分区：
文献类型：
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作者：
T. Nicolas;K. Ichiguchi
本文报道了仿星器中交换模的简化磁流体动力学模型的计算结果。该模型是基于施特劳斯方程，与电阻率，粘度和垂直热导率的一方面，和离子和电子的抗磁效应的另一方面。研究了理想不稳定和稳定模式的增长率和频率。主要结果是，理想的不稳定模式可以在电子方向上旋转，即使在没有电子的抗磁效应，由于热传导引起的线性分叉。分岔的存在解释解析。反磁效应可能会破坏稳定。对于理想稳定的（电阻）模式，我们发现，存在的粘度和热导率的情况下，在Te=Ti？>导致在电子方向上的旋转。
The results of a reduced magnetohydrodynamic model for the interchange mode in a stellarator are reported. The model is based on Strauss equations, with the addition of resistivity, viscosity and perpendicular heat conductivity on the one hand, and ion and electron diamagnetic effects on the other hand. The ideally unstable and stable mode growth rate and frequency are studied. The main result is that the ideally unstable mode can rotate in the electron direction even in the absence of electron diamagnetic effects, due to a linear bifurcation caused by the heat conductivity. The presence of the bifurcation is explained analytically. The diamagnetic effects can be destabilizing. For the ideally stable (resistive) mode, we find that the presence of viscosity and heat conductivity causes rotation in the electron direction in the case where Te=Ti ?>.