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Microwave scattering from laser spark in air

机译:空气中激光火花产生的微波散射

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摘要

In this paper, microwave Mie scattering from a laser-induced plasma in atmospheric air is computed. It shows that the scattered microwave transitions from coherent Rayleigh scattering to Mie scattering based on the relative transparency of the laser-induced plasma at the microwave frequency. The microwave penetration in the plasma alters from total transparency to partial shielding due to the sharp increase of the electron number density within the avalanche ionization phase. The transition from Rayleigh scattering to Mie scattering is verified by both the temporal evolution of the scattered microwave and the homogeneity of polar scattering plots.
机译:本文计算了大气中激光诱导等离子体的微波米氏散射。结果表明,基于微波频率下激光诱导等离子体的相对透明性,散射的微波从相干瑞利散射转变为米氏散射。由于雪崩电离相中电子数密度的急剧增加,等离子体中的微波穿透从完全透明变为部分屏蔽。通过散射微波的时间演化和极性散射图的均匀性,可以验证从瑞利散射到米氏散射的过渡。

著录项

  • 来源
    《Journal of Applied Physics》 |2012年第6期|p.063101.1-063101.5|共5页
  • 作者单位

    Mechanical, Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA;

    Mechanical, Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA;

    Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544, USA;

  • 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
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