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arXiv physics/9909063physics.plasm-ph
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一般环形等离子体中的Anderson局域模

Anderson-Localized Ballooning Modes in General Toroidal Plasmas

P. Cuthbert, R. L. Dewar

摘要:

本文研究了具有低整体磁剪切的三维磁环等离子体约束系统中的回旋不稳定性。在等离子体平衡中缺乏任何连续对称性可以导致这些模式通过类似于安德森局域化的过程沿着场线被局域化。这产生了多分支的局部特征值依赖性,其中每个分支对应于特征函数峰值所在的扩展覆盖空间的不同单位单元。这些现象的数值说明了三场周期的heliac H-1,并与轴对称$s$ - $α$托卡马克模型。本地化允许零剪切附近的微扰膨胀,使剪切的影响进行调查。

英文摘要:

Ballooning instabilities are investigated in three-dimensional magnetic toroidal plasma confinement systems with low global magnetic shear. The lack of any continuous symmetry in the plasma equilibrium can lead to these modes being localized along the field lines by a process similar to Anderson localization. This produces a multibranched local eigenvalue dependence, where each branch corresponds to a different unit cell of the extended covering space in which the eigenfunction peak resides. These phenomena are illustrated numerically for the three-field-period heliac H-1, and contrasted with an axisymmetric $s$-$α$ tokamak model. The localization allows a perturbative expansion about zero shear, enabling the effects of shear to be investigated.

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。

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