Screening of external magnetic perturbation fields due to sheared plasma flow
Screening of external magnetic perturbation fields due to sheared plasma flow
复制标题
屏蔽由剪切等离子体流引起的外部磁扰动场
DOI：
10.1088/0029-5515/56/9/092008
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发表时间：
2016-07
期刊：
影响因子：
--
通讯作者：
Y.Liu
中科院分区：
文献类型：
--
作者：
L.Li;Y.Q.Liu;Y.Liang;N.Wang;Q.Luan;F.C.Zhong;Y.Liu
在单流体电阻磁流体动力学模型，系统的环形建模努力致力于研究等离子体响应诱导的屏蔽的存在下，剪切环形流的外部3D磁场扰动。一个特别感兴趣的问题得到解决，当局部流速接近零的扰动合理的表面内的等离子体。与有利的平均环形曲率效应（GGJ效应（Glasser等人，1975年，物理流体7 875））相关联的微妙的屏蔽物理学被发现通过增强减小流量时的屏蔽而在理性表面附近的慢流期间起着重要作用。欧姆定律的不同条款之间的强烈的抵消效应被发现，导致不同的筛选物理在GGJ制度，相比，发生在更快的流量的典型的连续惯性制度的常规筛选。这些建模结果可能适用于解释某些锁模实验，以及I型边缘局域模抑制实验，与共振磁场扰动施加到托卡马克等离子体在低输入的环形扭矩。
Within the single fluid resistive magnetohydrodynamic model, systematic toroidal modelling efforts are devoted to investigate the plasma response induced screening of the applied external 3D magnetic field perturbations in the presence of sheared toroidal flow. One particular issue of interest is addressed, when the local flow speed approaches zero at the perturbation rational surface inside the plasma. Subtle screening physics, associated with the favourable averaged toroidal curvature effect (the GGJ effect (Glasser et al 1975 Phys. Fluids 7 875)), is found to play an essential role during slow flow near the rational surface by enhancing the screening at reduced flow. A strong cancellation effect between different terms of Ohm’s law is discovered, leading to different screening physics in the GGJ regime, as compared to that of conventional screening of the typical resistive-inertial regime occurring at faster flow. These modelling results may be applicable to interpret certain mode locking experiments, as well as type-I edge localized mode suppression experiments, with resonant magnetic field perturbations being applied to tokamak plasmas at low input toroidal torque.
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影响因子：
2.2
作者：
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影响因子：
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作者：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
2.2
作者：
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