Effect of large magnetic islands on screening of external magnetic perturbation fields at slow plasma flow
Effect of large magnetic islands on screening of external magnetic perturbation fields at slow plasma flow
复制标题
大磁岛对慢速等离子体流下外磁扰动场屏蔽的影响
DOI：
10.1063/1.4976987
复制
发表时间：
2017-02
影响因子：
2.2
通讯作者：
Zhong FC
中科院分区：
文献类型：
--
作者：
Li L;Liu YQ;Huang X;Luan Q;Zhong FC
基于合理表面附近平衡压力分布的局部平坦化，提出了一个包含大磁岛的环形电阻磁流体动力学等离子体响应模型，并进行了数值研究。据推测，这样的岛可以产生附近的托卡马克等离子体的边缘，由于共振磁微扰的渗透，用于控制边缘局域模式的目的。在该模型中，发现平衡压力的局部平坦化有助于减轻环形曲率引起的屏蔽效应[Glasser等人，Phys. Fluids 7，875（1975）]-当模态有理表面附近的局部环形流非常慢（例如，作为与场穿透相关联的模态锁定的结果）时，所谓的Glasser-Greene-约翰逊屏蔽。当等离子体旋转频率接近零时，计算等离子体响应幅度的饱和水平。磁岛内部的等离子体电阻率的局部修改也被发现影响在消失流的等离子体响应的饱和水平。
A toroidal resistive magneto-hydrodynamic plasma response model, involving large magnetic islands, is proposed and numerically investigated, based on local flattening of the equilibrium pressure profile near a rational surface. It is assumed that such islands can be generated near the edge of the tokamak plasma, due to the penetration of the resonant magnetic perturbations, used for the purpose of controlling the edge localized mode. Within this model, it is found that the local flattening of the equilibrium pressure helps to mitigate the toroidal curvature induced screening effect [Glasser et al., Phys. Fluids 7, 875 (1975)]-the so called Glasser-Greene-Johnson screening, when the local toroidal flow near the mode rational surface is very slow (for example, as a result of mode locking associated with the field penetration). The saturation level of the plasma response amplitude is computed, as the plasma rotation frequency approaches zero. The local modification of the plasma resistivity inside the magnetic island is found to also affect the saturation level of the plasma response at vanishing flow.
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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
发表时间：
2016-07
期刊：
Nucl. Fusion
影响因子：
--
作者：
L.Li;Y.Q.Liu;Y.Liang;N.Wang;Q.Luan;F.C.Zhong;Y.Liu
通讯作者：
Y.Liu
影响因子：
2.2
作者：
N. Ferraro
通讯作者：
N. Ferraro
影响因子：
2.2
作者：
Yueqiang Liu;A. Bondeson;C. Fransson;B. Lennartson;C. Breitholtz
通讯作者：
Yueqiang Liu;A. Bondeson;C. Fransson;B. Lennartson;C. Breitholtz
影响因子：
3.3
作者：
Yueqiang Liu;A. Kirk;Y. Gribov;M. Gryaznevich;T. Hender;E. Nardon
通讯作者：
Yueqiang Liu;A. Kirk;Y. Gribov;M. Gryaznevich;T. Hender;E. Nardon
影响因子：
2.2
作者：
F. Orain;M. Becoulet;G. Dif-Pradalier;Gta Guido Huijsmans;S. Pamela;E. Nardon;C. Passeron;G. Latu-G.-L
通讯作者：
F. Orain;M. Becoulet;G. Dif-Pradalier;Gta Guido Huijsmans;S. Pamela;E. Nardon;C. Passeron;G. Latu-G.-L