论文标题
在存在共振磁扰动的情况下，快速离子在Tokamak等离子体中的湍流转运
Turbulent transport of fast ions in tokamak plasmas in the presence of resonant magnetic perturbations
论文作者
论文摘要
使用测试粒子类型的理论运输模型研究了谐振磁扰动对托卡马克设备快速离子湍流的影响。直接数值模拟方法用于通过传输模型进行扩散系数计算。数值结果与其他分析得出的估计非常吻合。发现有限的Larmor半径效应会以代数减少运输，而磁扰动的幅度具有相反的作用。在存在随机动力学的情况下，不对称的环形磁场会诱导一个小的，径向的外向捏。湍流和磁扰动之间非线性耦合的协同机制增强了径向扩散。提出了针对运输系数的一般规模定律。
The effects of resonant magnetic perturbations on the turbulent transport of fast ions in tokamak devices are investigated using a theoretical transport model of test-particle type. The direct numerical simulation method is used to compute, via the transport model, the diffusion coefficients. The numerical results are in good agreement with other, analytically derived, estimations. It is found that finite Larmor radius effects decrease algebraically the transport, while the amplitude of magnetic perturbations has an opposite effect. In the presence of stochastic dynamics, the asymmetric toroidal magnetic field induces a small, radial, outward pinch. A synergistic mechanism of non-linear coupling between turbulence and magnetic perturbations enhances the radial diffusion. General scaling laws are proposed for the transport coefficients.
