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arXiv 1606.04780physics.plasm-ph
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计算新经典效应的回旋动力学方程的解析解

An analytical solution of the gyrokinetic equation for the calculation of neoclassical effects

Andrea Casolari

摘要:

本文件的目的是找到一个具体的,简化的假设下的gyrokinetic方程的解析解。我考虑的情况是,在磁岛链的存在下,碰撞等离子体。磁岛的存在导致扰动场的发生,特别是静电场,其梯度长度尺度与岛的宽度相当。当岛的宽度w与离子的拉莫尔半径rho_i相当时,漂移动力学方程不足以处理输运和计算新古典效应。不管怎样,我还是要用S. P. Hirshman和D. J. Sigmar在评论论文“Neoclassical transfer of impurities in tokamak plasmas”中提出,该论文是为求解不同碰撞状态下的漂移动力学方程而开发的。我首先要回顾一下漂移动力学理论,它主要用于研究磁化等离子体中的经典和新经典输运。然后我将转向回转动力学理论,它带来了一个更复杂的动力学方程,我将通过应用赫什曼和西格玛尔以前使用的方法来解决它。

英文摘要:

The purpose of this document is to find an analytical solution for the gyrokinetic equation under specific, simplificative hypotheses. The case I am considering is that of a collisional plasma in the presence of a chain of magnetic islands. The presence of the magnetic islands causes the onset of perturbative fields, in particular an electrostatic field, with a gradient length-scale comparable with the island's width. When the island's width w becomes comparable with the ion Larmor radius rho_i , the drift-kinetic equation is inadequate to treat the transport and the calculation of the neoclassical effects. Nevertheless, I'm going to solve the equation with the methods described by S. P. Hirshman and D. J. Sigmar in the review paper "Neoclassical transport of impurities in tokamak plasmas", which was developed to solve the drift-kinetic equation in different regimes of collisionality. I'm going to remind first the drift-kinetic theory, which was largely used to study classical and neoclassical transport in magnetized plasmas. Then I'm moving to the gyrokinetic theory, which brings to a more complicated kinetic equation, and I'm going to solve it by applying the approach used previously by Hirshman & Sigmar.

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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