双零L模等离子体中的预测性功率分配标度律
Predictive power-sharing scaling law in double-null L-mode plasmas
AI总结：
本文通过三维双流体模拟研究L模双零位形外靶功率分配机制，发现功率不对称由抗磁漂移、湍流和几何因子共同决定，并据此提出经TCV实验验证的预测性标度律。
摘要：
利用非线性、通量驱动的三维双流体模拟，研究了L模双零（DN）位形外靶功率分配调控的物理机制。对调节湍流水平的参数（如等离子体电阻率和磁不平衡度）进行扫描后发现，DN位形中的功率不对称性由抗磁漂移、湍流和几何因子的综合效应决定。基于这些观测结果，推导出一个基于解析理论的功率分配不对称性标度律，并与非线性模拟结果进行了比较。这些比较表明，该标度律能够有效捕捉模拟中观察到的趋势。利用TCV DN放电的实验数据进行验证，表明该标度律与实验结果一致。
英文摘要：
The physical mechanisms regulating the power sharing at the outer targets of L-mode double-null (DN) configurations are investigated using nonlinear, flux-driven, three-dimensional two-fluid simulations. Scans of parameters that regulate the turbulent level, such as the plasma resistivity and the magnetic imbalance, reveal that the power asymmetry in DN configurations is determined by the combined effects of diamagnetic drift, turbulence, and geometrical factor. Leveraging these observations, an analytical theory-based scaling law for the power-sharing asymmetry is derived and compared with nonlinear simulations. These comparisons indicate that the scaling law effectively captures the trends observed in simulations. Validation with experimental data from TCV DN discharges demonstrates agreement of the scaling law with the experimental results.
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