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首页> 外文学位 >Perpendicular Momentum Input of Lower Hybrid Waves and Its Influence on Driving Plasma Rotation.
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Perpendicular Momentum Input of Lower Hybrid Waves and Its Influence on Driving Plasma Rotation.

机译：较低杂波的垂直动量输入及其对驱动等离子体旋转的影响。

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摘要

The mechanism of perpendicular momentum input of lower hybrid waves and its influence on plasma rotation are studied. Discussion for parallel momentum input of lower hybrid waves is presented for comparison. It is found out that both toroidal and poloidal projections of perpendicular momentum input of lower hybrid waves are stronger than those of parallel momentum input. The perpendicular momentum input of lower hybrid waves therefore plays a dominant role in forcing the changes of rotation velocity observed during lower hybrid current drive. Lower hybrid waves convert perpendicular momentum carried by the waves into the momentum of dc electromagnetic field by inducing a resonant-electron flow across flux surfaces therefore charge separation and a radial dc electric field. The dc field releases its momentum into plasma through the Lorentz force acting on the radial return current driven by the radial electric field. Plasma is spun up by the Lorentz force. An improved quasilinear theory with gyro-phase dependent distribution function is developed to calculate the radial flux of resonant electrons. Rotations are determined by a set of fluid equations for bulk electrons and ions, which are solved numerically by applying a finite-difference method. Analytical expressions for toroidal and poloidal rotations are derived using the same hydrodynamic model.
机译：研究了低杂波的垂直动量输入机理及其对等离子体旋转的影响。讨论了较低杂波的平行动量输入以进行比较。结果发现，较低混合波的垂直动量输入的环形和多面体投影都比平行动量输入的环形和多面体投影都强。因此，下部混合波的垂直动量输入在迫使下部混合电流驱动期间观察到的转速变化方面起主要作用。较低的杂波通过在整个磁通表面上引起共振电子流，从而将电荷所携带的垂直动量转换为直流电磁场的动量，从而将电荷分离和径向直流电场。直流磁场通过作用于径向电场驱动的径向返回电流的洛伦兹力将其动量释放到等离子体中。洛伦兹部队加速了等离子体的发展。提出了一种具有陀螺相位相关分布函数的改进准线性理论，用于计算共振电子的径向通量。旋转由大量电子和离子的流体方程组确定，这些方程通过应用有限差分方法进行数值求解。使用相同的流体动力学模型可以得出环向和极向旋转的解析表达式。

著录项

  • 作者

    Guan, Xiaoyin.;

  • 作者单位

    Princeton University.;

  • 授予单位 Princeton University.;
  • 学科 Physics Fluid and Plasma.
  • 学位 Ph.D.
  • 年度 2013
  • 页码 159 p.
  • 总页数 159
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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