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Recent fast electron energy transport experiments relevant to fast ignition inertial fusion

机译：最近与快速点火惯性聚变有关的快速电子能量传输实验

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摘要

A number of experiments have been undertaken at the Rutherford Appleton Laboratory that were designed to investigate the physics of fast electron transport relevant to fast ignition inertial fusion. The laser, operating at a wavelength of 1054nm, provided pulses of up to 350 J of energy on target in a duration that varied in the range 0.5-5 ps and a focused intensity of up to 10~(21) W cm~(-2). A dependence of the divergence of the fast electron beam with intensity on target has been identified for the first time. This dependence is reproduced in two-dimensional particle-in-cell simulations and has been found to be an intrinsic property of the laser-plasma interaction. A number of ideas to control the divergence of the fast electron beam are described. The fractional energy transfer to the fast electron beam has been obtained from calibrated, time-resolved, target rear-surface radiation temperature measurements. It is in the range 15-30%, increasing with incident laser energy on target. The fast electron temperature has been measured to be lower than the ponderomotive potential energy and is well described by Haines' relativistic absorption model.
机译：卢瑟福·阿普尔顿实验室已经进行了许多实验，旨在研究与快速点火惯性聚变有关的快速电子传输的物理学。激光器工作在1054nm的波长上，在目标上提供高达350 J的能量脉冲，持续时间在0.5-5 ps范围内变化，聚焦强度高达10〜（21）W cm〜（- 2）。首次确定了快速电子束的发散与强度的关系。这种依赖性在二维粒子模拟中得以重现，并且已被发现是激光等离子体相互作用的固有特性。描述了许多控制快速电子束发散的想法。已经从校准的，时间分辨的目标后表面辐射温度测量值获得了向快速电子束转移的部分能量。它在15％到30％的范围内，随着目标上入射激光能量的增加而增加。据测量，快速电子温度低于动磁势能，并且由Haines的相对论吸收模型很好地描述。

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  • 来源
    《Nuclear fusion》 |2009年第10期|24.1-24.8|共8页
  • 作者

    P.A. Norreys; R.H.H. Scott; K.L. Lancaster; J.S. Green; A.P.L. Robinson; et al;

  • 作者单位

    STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0QX, UK Imperial College London, Prince Consort Road, London SW7 2BZ, UK;

    STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0QX, UK Imperial College London, Prince Consort Road, London SW7 2BZ, UK;

    STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0QX, UK;

    STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0QX, UK Imperial College London, Prince Consort Road, London SW7 2BZ, UK;

    STFC Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0QX, UK;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    laser-plasma acceleration of electrons and ions; fast ignition of compressed fusion fuels;

    机译：电子和离子的激光等离子体加速;压缩聚变燃料快速点火;

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