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Shear flow generation due to electromagnetic instabilities

机译:由于电磁不稳定而产生的剪切流

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Shear flow is the most important ingredient governing nonlinear behaviour of many types of plasma instability. Electromagnetic effects on shear flow generation have been studied for an electromagnetic drift wave called resistive drift-Alfven mode (RDAM) and a global MHD mode called resistive wall mode (RWM). For RDAM it is found that the generated shear flow stabilizes the dominant modes; however, other modes are destabilized. For RWM Maxwell stress due to magnetic fluctuations has a tendency to suppress the poloidal flow near the plasma surface, which gives almost the same saturation level for different initial poloidal flows, since the shear flow stabilization disappears.
机译:剪切流是控制多种等离子体不稳定性的非线性行为的最重要成分。对于称为电阻漂移-Alfven模式(RDAM)的电磁漂移波和称为电阻壁模式(RWM)的整体MHD模式,已经研究了电磁波对剪切流产生的影响。对于RDAM,发现产生的剪切流稳定了主导模态。但是,其他模式不稳定。对于RWM,由于磁涨落引起的麦克斯韦应力具有抑制等离子体表面附近的胶质流的趋势,这对不同的初始胶质流具有几乎相同的饱和度,因为剪切流稳定性消失了。

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