arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1906.04451physics.plasm-ph
收藏

一般轴对称环形几何中的切变阿尔文和声学连续体

Shear Alfvén and acoustic continuum in general axisymmetric toroidal geometry

Matteo Valerio Falessi, Nakia Carlevaro, Valeria Fusco, Gregorio Vlad, Fulvio Zonca

摘要:

在理想磁流体动力学极限下,在一般几何的气球空间中,引入并求解了描述沿磁场线传播的剪切Alfvén波和离子声波的连续谱的方程。这种方法与Chu等人(1992)[Phys.Fluids B 4,3713(1992)]的早期分析是等价的,但在气球空间中的现有公式可以很容易地将其扩展到包括回转运动和三维平衡效应。特别是,在Chen和Zonca 2017 [Phys. Plasmas 24,072511(2017)]之后,采用MHD极限来说明简单情况下的一般方法,并在Floquet和Hill方程理论的框架内求解方程。剪切阿尔文和离子声波连续结构的广义等离子体惯性在一般的鱼骨状色散关系的连接也被说明和讨论。作为应用,计算了偏滤器托卡马克实验装置参考平衡的连续频谱。的结果进行了比较,所获得的MARS代码采用标准的方法,表现出良好的协议。

英文摘要:

The equations describing the continuous spectrum of shear Alfvén and ion sound waves propagating along magnetic field lines are introduced and solved in the ballooning space for general geometry in the ideal MHD limit. This approach is equivalent to earlier analyses by Chu et al. 1992 [Phys. Fluids B 4, 3713 (1992)] but the present formulation in the ballooning space allows to readily extend it to include gyrokinetic and three-dimensional equilibrium effects. In particular, following Chen and Zonca 2017 [Phys. Plasmas 24, 072511 (2017)], the MHD limit is adopted to illustrate the general methodology in a simple case, and the equations are solved within the framework of Floquet and Hill's equation theory. The connection of shear Alfvén and ion sound wave continuum structures to the generalized plasma inertia in the general fishbone like dispersion relation is also illustrated and discussed. As an application, the continuous frequency spectrum is calculated for a reference equilibrium of the Divertor Tokamak Test facility. The results are compared with those obtained by the MARS code adopting the standard methodology, demonstrating excellent agreement.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑