标题： 非临界镜结构在各向异性等离子体中 显示英文标题

标题： Subcritical mirror structures in an anisotropic plasma

摘要： 基于类似于Grad-Shafranov方程的结果表明，在静态状态下压力仅为局部磁场幅值函数的回旋各向异性等离子体可以用一个变分原理来描述，其自由能密度由平行张力给出。 利用这种方法可以证明，在镜像不稳定性阈值下方稍微构造的小振幅静态空腔与KPII方程的 lump 孤子相对应，并且是不稳定的。 此外还表明，诸如有限Larmour半径校正等正则化效应在描述大振幅镜像结构时不能被忽略。 显示英文摘要

摘要： Based on Grad-Shafranov-like equations, a gyrotropic plasma where the pressures in the static regime are only functions of the amplitude of the local magnetic field is shown to be amenable to a variational principle with a free energy density given by the parallel tension. This approach is used to demonstrate that small- amplitude static holes constructed slightly below the mirror instability threshold identify with lump solitons of KPII equation and turn out to be unstable. It is also shown that regularizing effects such as finite Larmor radius corrections cannot be ignored in the description of large-amplitude mirror structures.