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首页> 外文期刊>Journal of Plasma Physics >Prospects for observing the magnetorotational instability in the plasma Couette experiment
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Prospects for observing the magnetorotational instability in the plasma Couette experiment

机译:等离子体Couette实验中观察磁旋转不稳定性的前景

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摘要

Many astrophysical disks, such as protoplanetary disks, are in a regime where nonideal, plasma-specific magnetohydrodynamic (MHD) effects can significantly influence the behaviour of the magnetorotational instability (MRI). The possibility of studying these effects in the plasma Couette experiment (PCX) is discussed. An incompressible, dissipative global stability analysis is developed to include plasma-specific two-fluid effects and neutral collisions, which are inherently absent in analyses of Taylor-Couette flows (TCFs) in liquid metal experiments. It is shown that with boundary driven flows, a ion-neutral collision drag body force significantly affects the azimuthal velocity profile, thus limiting the flows to regime where the MRI is not present. Electrically driven flow (EDF) is proposed as an alternative body force flow drive in which the MRI can destabilize at more easily achievable plasma parameters. Scenarios for reaching MRI relevant parameter space and necessary hardware upgrades are described.
机译:许多天体盘,例如原行星盘,处于非理想的,特定于等离子体的磁流体动力学(MHD)效应会显着影响磁旋转不稳定性(MRI)行为的状态。讨论了在血浆Couette实验(PCX)中研究这些效应的可能性。发展了一种不可压缩的,耗散的整体稳定性分析,以包括特定于等离子体的两种流体效应和中性碰撞,这在液态金属实验中的泰勒-库埃特流量(TCF)分析中是固有的。结果表明,在边界驱动流的作用下,离子中性碰撞拖动体力会显着影响方位角速度分布,从而将流限制在不存在MRI的区域。提出了电驱动流(EDF)作为替代体力流驱动器,其中MRI可以在更容易实现的血浆参数下不稳定。描述了达到MRI相关参数空间和必要的硬件升级的方案。

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