The geodesic transfer effect on zonal flows in tokamak edge turbulence
The geodesic transfer effect on zonal flows in tokamak edge turbulence
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DOI：
10.1016/j.physleta.2003.10.080
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发表时间：
2003-12
影响因子：
2.6
通讯作者：
B. Scott
中科院分区：
文献类型：
--
作者：
B. Scott
三维，全球一致的通量管几何形状的托卡马克边缘湍流的详细计算显示抑制的标准方案中，由湍流产生的纬向ExB流应导致运输障碍的形成。通过与平板几何形状的比较和能量分析发现，纬向流能量通过测地曲率与压力的环形耦合而耗尽。边缘输运势垒则取决于新古典平衡的物理性质。
Detailed computations of tokamak edge turbulence in three dimensional, globally consistent flux tube geometry show an inhibition of the standard scenario in which zonal ExB flows generated by the turbulence should lead to transport barrier formation. It is found by comparison to slab geometry and by analysis of the energetics that the zonal flow energy is depleted by toroidal coupling to the pressure through the geodesic curvature. Edge transport barriers would then depend on the physics of the neoclassical equilibrium.