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Electron generation and transport in intense relativistic laser-plasma interactions relevant to Fast Ignition ICF.

机译:与快速点火ICF有关的强烈相对论性激光-等离子体相互作用中的电子产生和传输。

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摘要

The reentrant cone approach to Fast Ignition, an advanced Inertial Confinement Fusion scheme, remains one of the most attractive because of the potential to efficiently collect and guide the laser light into the cone tip and direct energetic electrons into the high density core of the fuel. However, in the presence of a preformed plasma, the laser energy is largely absorbed before it can reach the cone tip. Full scale fast ignition laser systems are envisioned to have prepulses ranging between 100 mJ to 1 J. A few of the imperative issues facing fast ignition, then, are the conversion efficiency with which the laser light is converted to hot electrons, the subsequent transport characteristics of those electrons, and requirements for maximum allowable prepulse this may put on the laser system.;This dissertation examines the laser-to-fast electron conversion efficiency scaling with prepulse for cone-guided fast ignition. Work in developing an extreme ultraviolet imager diagnostic for the temperature measurements of electron-heated targets, as well as the validation of the use of a thin wire for simultaneous determination of electron number density and electron temperature will be discussed.
机译:渐进圆锥快速燃烧(一种先进的惯性约束聚变方案)方法仍然是最吸引人的方法之一,因为它有可能有效地将激光收集并引导到圆锥体尖端,并将高能电子引导到燃料的高密度核中。但是,在存在预先形成的等离子体的情况下,激光能量会在到达锥形尖端之前被大量吸收。预计全尺寸快速点火激光系统的预脉冲范围在100 mJ至1 J之间。快速点火面临的一些必要问题是激光转换为热电子的转换效率以及随后的传输特性。这些电子,以及对最大允许预脉冲的要求,这可能会对激光系统造成影响。;本论文研究了在锥引导下快速点火的激光与快速电子转换效率与预脉冲之间的关系。将讨论开发用于电子加热目标的温度测量的极紫外成像仪诊断的工作,以及使用细线同时确定电子数密度和电子温度的验证。

著录项

  • 作者

    Ma, Tammy Yee Wing.;

  • 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 192 p.
  • 总页数 192
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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