Development of the transport-code framework forself-consistent predictions of rotation and the radial electric field
Development of the transport-code framework forself-consistent predictions of rotation and the radial electric field
复制标题
开发用于旋转和径向电场自洽预测的传输代码框架
DOI：
10.1088/0029-5515/53/7/073050
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发表时间：
2013
期刊：
影响因子：
3.3
通讯作者：
M. Yagi and T. Fujita
中科院分区：
文献类型：
--
作者：
M. Honda;S. Ide;T. Takizuka;N. Hayashi;M. Yoshida;M. Yagi and T. Fujita
一个环形动量求解器，计算的环形角动量密度的演变，总结了热物种，建模和集成到1.5 D的综合运输代码TOPICS。一个非迭代的计划，唯一确定的径向电场E r的开发。它也被用来计算基于新古典输运理论的每个物种的平行和环形流。结合TOPICS和轨道跟踪蒙特卡罗代码OFMC使我们能够自洽地预测不仅密度，温度和安全因子的演变，但也环动量和E r。所开发的框架已通过JT-60 U实验测试，并显示出对环形旋转的预测能力。几个随时间变化的模拟中，环形旋转和E r起着重要的作用进行，表明H-模式的限制相当程度上取决于通过E r的变化，如JT-60 U中观察到的环形旋转的方向。在ITER中，如果旋转仅由中性束（NB）注入驱动，则难以期望快速的环形旋转，而残余应力可能潜在地产生与NB相当或更大的扭矩。
A toroidal momentum solver, which calculates the evolution of the toroidal angular momentum density summed over thermal species, is modelled and integrated into the 1.5 D integrated transport code TOPICS. A non-iterative scheme to uniquely determine the radial electric field E r is developed. It is also used to compute the parallel and toroidal flows for each species based on the neoclassical transport theory. The combination of TOPICS and the orbit-following Monte Carlo code OFMC enables us to self-consistently predict the evolution of not only the density, temperature and safety factor but also the toroidal momentum and E r. The framework developed has been tested against JT-60U experiments and showed the predictive capability of toroidal rotation. Several time-dependent simulations in which toroidal rotation and E r play an important role are carried out, showing that the H-mode confinement considerably depends on the direction of toroidal rotation via the change in E r, as observed in JT-60U. Rapid toroidal rotation can be hardly expected in ITER if rotation is solely driven by neutral beam (NB) injection, whereas the residual stress may potentially generate the torque comparable to or greater than that by NBs.