A Kinetic Magnetohydrodynamic Energy Integral in Three Dimensional Geometry
A Kinetic Magnetohydrodynamic Energy Integral in Three Dimensional Geometry
复制标题
三维几何中的动磁流体动力能量积分
DOI：
10.1063/1.873922
复制
发表时间：
2000
影响因子：
2.2
通讯作者：
A. Könies
中科院分区：
文献类型：
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作者：
A. Könies
最近观测到的星体几何中的Alfven波激发以及全球磁流体(MHD)稳定性代码CAS3D(分析3D平衡的MHD稳定性的代码)成功地描述了它们[C.Nuhrenberg，Phys.等离子体6,137(1998)]提出了一个问题，即快速粒子群可能在多大程度上破坏这种模式的稳定。在回答这个问题时，必须建立一个理论基础，通过这个理论基础来研究快粒子对现实三维几何中整体MHD模式的影响。作为实现这一目标的第一步，推导并求解了一个线性化的电磁扰动漂移动力学方程。进一步证明了广义动磁流体能量积分的存在，它是关于振型频率的非线性的。这个能量积分在极限上与以前不太普遍的结果一致。
Recent observations of Alfven wave excitations in stellarator geometry and their successful description by the global magnetohydrodynamic (MHD) stability code CAS3D (Code for the Analysis of the MHD Stability of 3D Equilibria) [C. Nuhrenberg, Phys. Plasmas 6, 137 (1998)] have raised the question of to what extent a fast particle population may destabilize such modes. In answering this question a theoretical basis must be developed through which the influence of fast particles upon global MHD modes in realistic three-dimensional geometries can be investigated. As a first step towards this goal, a linearized drift-kinetic equation for electro-magnetic perturbations is derived and solved. It is furthermore shown that a generalized kinetic MHD energy integral exists which is nonlinear with respect to the mode frequencies. This energy integral agrees with previous less general results in their limits.
Schwab,C：“理想磁流体动力学：三维等离子体构型的全局模式分析”流体物理学 B 5. 5(9)。
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