Radial discontinuities in tokamak magnetohydrodynamic equilibria with poloidal flow
Radial discontinuities in tokamak magnetohydrodynamic equilibria with poloidal flow
复制标题
极向流托卡马克磁流体动力学平衡中的径向不连续性
DOI：
10.1063/1.874083
复制
发表时间：
2000
影响因子：
2.2
通讯作者：
J. Freidberg
中科院分区：
文献类型：
--
作者：
R. Betti;J. Freidberg
结果表明，跨音速极向流导致理想的磁流体动力学托卡马克平衡与径向不连续的密度，压力和流速分布。跨音速剖面被定义为相对于极向声速（csBp/B）具有从亚音速到超音速范围内的流速。平衡量的跃变近似发生在音速面上，其量级为e1/2（e为纵横比的倒数）。由于在音速表面的大的速度剪切，跨音速剖面可能会改善能量约束的建议，目前的理解托卡马克等离子体湍流抑制。
It is shown that transonic poloidal flow leads to ideal magnetohydrodynamic tokamak equilibria with radial discontinuities in the density, pressure, and flow velocity profiles. Transonic profiles are defined as having flow velocities ranging from subsonic to supersonic with respect to the poloidal sound speed (csBp/B). The jump of the equilibrium quantities occurs approximately at the sonic surface and its magnitude is of order e1/2 (e is the inverse aspect ratio). Because of the large velocity shear at the sonic surface, transonic profiles may improve energy confinement as suggested by current understanding of tokamak plasma turbulence suppression.