Effects of finite poloidal gyroradius, shaping, and collisions on the zonal flow residual
Effects of finite poloidal gyroradius, shaping, and collisions on the zonal flow residual
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DOI：
10.1063/1.2718519
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发表时间：
2007-05
影响因子：
2.2
通讯作者：
Yong Xiao;P. Catto;W. Dorland
中科院分区：
文献类型：
--
作者：
Yong Xiao;P. Catto;W. Dorland
纬向流有助于减少和调节托卡马克中的湍流传输水平。罗森布鲁斯和辛顿已经证明，在无碰撞的情况下，纬向气流衰减到不消失的残余水平[M.RosenBluth和F.Hinton，Phys。莱特牧师。80,724(1998)]和碰撞[F·辛顿和M·罗森布鲁斯，等离子体物理。控制室。核聚变41，A653(1999)[香蕉状态等离子体。总结了近年来带状流动的研究进展，包括等离子体截面整形对带状流动残馀影响的评价，小于电子回转半径的短波长，以及相对于带状低频的任意离子碰撞。除了给出这些新发展的简要总结之外，分析结果还与GS2数值模拟[M.Kotschenreuther，G.Rewoldt和W.Tang，Comput]进行了比较。太棒了。交警。88,128(1991)]，以证明它们作为湍流代码基准的价值。
Zonal flow helps reduce and regulate the turbulent transport level in tokamaks. Rosenbluth and Hinton have shown that zonal flow damps to a nonvanishing residual level in collisionless [M. Rosenbluth and F. Hinton, Phys. Rev. Lett. 80, 724 (1998)] and collisional [F. Hinton and M. Rosenbluth, Plasma Phys. Control. Fusion 41, A653 (1999)] banana regime plasmas. Recent zonal flow advances are summarized including the evaluation of the effects on the zonal flow residual by plasma cross-section shaping, shorter wavelengths including those less than an electron gyroradius, and arbitrary ion collisionality relative to the zonal low frequency. In addition to giving a brief summary of these new developments, the analytic results are compared with GS2 numerical simulations [M. Kotschenreuther, G. Rewoldt, and W. Tang, Comput. Phys. Commun. 88, 128 (1991)] to demonstrate their value as benchmarks for turbulence codes.