Stability of resistive wall modes in reversed field pinches with longitudinal flow and dissipative effects
Stability of resistive wall modes in reversed field pinches with longitudinal flow and dissipative effects
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DOI：
10.1063/1.873191
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发表时间：
1999-09
影响因子：
2.2
通讯作者：
S. Guo;J. Freidberg;R. Nachtrieb
中科院分区：
文献类型：
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作者：
S. Guo;J. Freidberg;R. Nachtrieb
研究了在电阻壁边界条件下反场捏缩（RFP）中非谐振外扭结模的稳定性。分析中考虑了等离子体的环形旋转、平行粘度以及有限β的影响。采用传统的α -Θ0平衡模型，仔细研究了平衡参数对模态不稳定性的影响。研究发现，电阻壁模（RWM）的行为对RWM的反转参数F非常敏感。无论是低β（或零β）等离子体还是高β等离子体，等离子体旋转以及粘度和/或离子声波连续频谱阻尼的作用都可以稳定相对于等离子体的壁面某些位置的RWM。对于典型的RFP工作参数，稳定模态所需的旋转速度在离子声波和Alfven波速度之间。这比当前rfp中的自然旋转速度要大，因此基于上面的1…
The stability of the nonresonant external kink modes in a reversed field pinch (RFP) under resistive wall boundary conditions is investigated. The effects of toroidal plasma rotation and parallel viscosity, as well as the finite β are included in the analysis. The influence of the equilibrium parameters on the mode instability is carefully studied by employing the conventional α–Θ0 equilibrium models. It is found that the behavior of the resistive wall mode (RWM) is rather sensitive to the reversal parameter F of RFPs. The effects of plasma rotation together with the viscosity and/or ion sound wave continuous spectrum damping can stabilize the RWM for certain positions of the wall relative to the plasma for both the low β (or zero β) and high β plasmas. For typical RFP operating parameters, the rotation velocity required to stabilize the modes is in the range between the ion sound wave and Alfven wave velocities. This is larger than the natural rotation velocity in current RFPs, hence based on the above l...