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Anomalous radial transport in tokamak edge plasma.

机译:托卡马克边缘等离子体中的异常径向传输。

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摘要

Energy from nuclear fusion of Hydrogen isotopes is a possible alternative to fossil fuels. For this to be of practical utility, confinement of Hydrogen in a plasma state for a minimum duration is necessary. Since confinement is strongly affected by radial transport processes, understanding the observed modes of radial transport in confined plasma is of vital importance for progress towards fusion energy. The present dissertation is aimed at studying radial(cross-field) transport in the tokamak edge plasma. The present thesis is divided into three parts: (1) In the first part, we present a model of generation of intermittent convective meso-scale structures (blobs) based on the synergy of the interchange drive and nonlinear effects associated with drift--wave turbulence. (2) In the second part, we attempt to explain the preferential propagation of blobs radially outward as a consequence of the radially decreasing density of a confined plasma. (3) In the third part, we present a model for simulating anomalous radial transport in kinetic codes for tokamak edge plasma.
机译:氢同位素核聚变产生的能量可能替代化石燃料。为了使其实用,必须将等离子体状态的氢限制在最小持续时间。由于限制受到径向传输过程的强烈影响,因此了解在受限等离子体中观察到的径向传输模式对于向聚变能发展至关重要。本文旨在研究托卡马克边缘等离子体中的径向(跨场)传输。本论文分为三个部分:(1)在第一部分中,我们基于互换驱动和与漂移-波相关的非线性效应的协同作用,提出了一种间歇对流中尺度结构(斑点)的生成模型。湍流。 (2)在第二部分中,我们试图解释由于受限等离子体的径向减小而导致的斑点沿径向向外的优先传播。 (3)在第三部分中,我们提供了一个模拟托卡马克边缘等离子体动力学代码中的径向传输异常的模型。

著录项

  • 作者单位

    University of California, San Diego.;

  • 授予单位 University of California, San Diego.;
  • 学科 Engineering Aerospace.;Energy.;Physics Fluid and Plasma.
  • 学位 Ph.D.
  • 年度 2010
  • 页码 85 p.
  • 总页数 85
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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