论文标题
鱼骨模式中的热离子动力学效应和兰道阻尼
Thermal ion kinetic effects and Landau damping in fishbone modes
论文作者
论文摘要
可以扩展血浆中宏观不稳定性的动力学MHD混合模拟方法，以包括热离子和能量离子的动力学作用。新的耦合方案包括密度的同步和热离子和MHD之间的平行速度（除压耦合）以确保准洗手液条件并避免数值误差。新方法已在动力学MHD代码M3D-C1-K中实施，并用于研究DIII-D和NSTX中鱼骨模式中的热离子动力学效应和Landau阻尼。发现热离子动力学效应会导致由$ q_ \ mathrm {minrm {minrm {min}> 1 $驱动的非共振$ n = 1 $鱼骨模式的频率增加，而陆托抑制作用可以提供其他稳定效应。还进行了NSTX中的$ n = 1 $鱼骨模式的非线性模拟，并计算了磁通量表面上的扰动和能量颗粒的传输。
The kinetic-MHD hybrid simulation approach for macroscopic instabilities in plasmas can be extended to include the kinetic effects of both thermal ions and energetic ions. The new coupling scheme includes synchronization of density and parallel velocity between thermal ions and MHD, in addition to pressure coupling, to ensure the quasineutrality condition and avoid numerical errors. The new approach has been implemented in the kinetic-MHD code M3D-C1-K, and was used to study the thermal ion kinetic effects and Landau damping in fishbone modes in both DIII-D and NSTX. It is found that the thermal ion kinetic effects can cause an increase of the frequencies of the non-resonant $n=1$ fishbone modes driven by energetic particles for $q_\mathrm{min}>1$, and Landau damping can provide additional stabilization effects. A nonlinear simulation for $n=1$ fishbone mode in NSTX is also performed, and the perturbation on magnetic flux surfaces and the transport of energetic particles are calculated.
