Global mode analysis of ideal magnetohydrodynamic modes in a heliotron/torsatron system: I. Mercier-unstable equilibria
Global mode analysis of ideal magnetohydrodynamic modes in a heliotron/torsatron system: I. Mercier-unstable equilibria
复制标题
日光管/扭转管系统中理想磁流体动力学模式的全局模式分析：I. Mercier-不稳定平衡
DOI：
10.1063/1.873410
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发表时间：
1999
影响因子：
2.2
通讯作者：
M. Okamoto
中科院分区：
文献类型：
--
作者：
J. Chen;N. Nakajima;M. Okamoto
通过对L=2/M=10的具有固有大Shafranov位移的平轴Heliotron/Torsatron系统Mercier不稳定平衡态的理想磁流体动力学（MHD）模的整体模分析，从局部模分析的角度提出了Mercier不稳定平衡态整体模的猜想[N. Nakajima，Phys. Plasmas 3，4556（1996）]中所描述的，并且已经阐明了这种三维系统所固有的压力驱动模式的特性。Mercier-不稳定平衡点分为环面占优和螺旋占优Mercier-不稳定平衡点。在环向主导的Mercier不稳定平衡中，压力驱动模从低环向模数n<M的交换模，到中等环向模数n <$M的托卡马克样气球模，最后到相当高环向模数n <$M的三维系统固有的气球模。在螺旋度占优势的Mercier不稳定平衡中，压力驱动模式从初始模式转变为初始模式。
By means of a global mode analysis of ideal magnetohydrodynamic (MHD) modes for Mercier-unstable equilibria in a planar axis L=2/M=10 heliotron/torsatron system with an inherently large Shafranov shift, the conjecture for global mode in Mercier-unstable equilibria from local mode analysis [N. Nakajima, Phys. Plasmas 3, 4556 (1996)] has been confirmed and the properties of pressure-driven modes inherent to such three-dimensional systems have been clarified. The Mercier-unstable equilibria are categorized into toroidicity-dominant and helicity-dominant Mercier-unstable equilibria. In the toroidicity-dominant Mercier-unstable equilibria, the pressure-driven modes change from interchange modes for low toroidal mode numbers n<M, to tokamak-like ballooning modes for moderate toroidal mode numbers n∼M, and finally to ballooning modes purely inherent to three-dimensional systems for fairly high toroidal mode numbers n≫M. In the helicity-dominant Mercier-unstable equilibria, the pressure-driven modes change from i...