Alfvén continuum with toroidicity

Alfvén continuum with toroidicity
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具有环形的阿尔文连续谱

DOI:
10.1063/1.865926
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发表时间:
1986
期刊:
影响因子:
4.6
通讯作者:
S. Mahajan
S. Mahajan
中科院分区:
工程技术2区
文献类型:
--
作者:
S. Riyopoulos;S. Mahajan

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利用磁流体动力学(MHD)波传播算子的对称性,将环形本征模表示为相互正交的圆柱模的叠加。由于具有相同频率但具有不同螺旋度的谐振表面的圆柱模式之间的简并性,环形扰动产生上述模式的零阶混合。频率为ω20的环形本征模具有多个谐振表面,每个表面相对于其圆柱位置移动并承载多光谱内容。因此,频率为ω0的单个螺旋度环形天线强烈耦合到具有匹配的局部阿尔芬频率的所有不同螺旋度谐振表面。连续谱中的模式与全局阿尔芬模式之间的零阶耦合也是由环面性和简并性引起的。本研究中使用的微扰技术是量子力学方法的MHD对应物,适用于整个MHD谱范围。
The symmetry property of the magnetohydrodynamic (MHD) wave propagation operator is utilized to express the toroidal eigenmodes as a superposition of the mutually orthogonal cylindrical modes. Because of the degeneracy among cylindrical modes with the same frequency but resonant surfaces of different helicity, the toroidal perturbation produces a zeroth‐order mixing of the above modes. The toroidal eigenmodes of frequency ω20 have multiple resonant surfaces, with each surface shifted relative to its cylindrical position and carrying a multispectral content. Thus a single helicity toroidal antenna of frequency ω0 couples strongly to all different helicity resonant surfaces with matching local Alfven frequency. Zeroth‐order coupling between modes in the continuum and global Alfven modes also results from toroidicity and degeneracy. The perturbation technique used in this study is the MHD counterpart of the quantum‐mechanical methods and is applicable through the entire range of the MHD spectrum.
安.职业.Hyg.28-2。
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