论文标题
带有环形模式的频率乘以静态HL-2A的Tokamak上的扭结/鱼骨模式的数量
Frequency multiplication with toroidal mode number of kink/fishbone modes on a static HL-2A-like tokamak
论文作者
论文摘要
在存在能量颗粒（EPS）的情况下，经常在HL-2A上观察到n = 1,2,3或更高的长寿命模式（LLM）频率乘法，其中n是环形模式数。使用Nimrod代码在静态HL-2A类似于HL-2A的Tokamak上的能量颗粒（EP）驱动的扭结/鱼骨模式的杂种动力学MHD模型模拟使用Nimrod代码相对发现，当背景等离子压力相对较高时，EP压力和光束频率均与EP的频率相对较低，并且频率几乎是频率与EP的频率，甚至是任何频率的频率，即使是任何频率，即使是任何频率，甚至是频率，即乘坐频率，即乘数（均为频率）（均为频率）（均为频率（平衡等离子体旋转。另外，频率乘法仍然存在为磁轴Q0处的安全系数。在没有EPS的情况下，1/1模式的增长率最大。但是，随着EP压力的增加，2/2模式或3/3模式的增长率变得占主导地位，这表明较高的N模式更容易受到EPS的影响。这些结果可能会阐明有关在弱或反向中央磁性剪切的Tokamaks的高级场景中，扭结/鱼骨模式的环形模式数量依赖性的理解。
In the presence of energetic particles (EPs), the Long-Lived Mode (LLM) frequency multiplication with n = 1,2,3 or higher is often observed on HL-2A, where n is the toroidal mode number. Hybrid kinetic-MHD model simulations of the energetic particle (EP) driven kink/fishbone modes on a static HL-2A-like tokamak using NIMROD code find that, when the background plasma pressure is relatively high, and the EP pressure and the beam energy are relatively low, the mode frequency increases almost linearly with EP pressure, and the frequency is proportional to n ("frequency multiplication"), even in absence of any equilibrium plasma rotation. In addition, the frequency multiplication persists as the safety factor at magnetic axis q0 varies. In absence of EPs, the growth rate of the 1/1 mode is the largest; however, as the EP pressure increases, the growth rate of 2/2 modes or 3/3 modes becomes dominant, suggesting that the higher-n modes are more vulnerable to EPs. These results may shed light on the understanding about the toroidal mode number dependence of kink/fishbone modes in the advanced scenarios of tokamaks with weak or reversed central magnetic shear.
