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太赫兹波在飞行器等离子体鞘套中的传输特性

耿兴宁 徐德刚 李吉宁 陈锴 钟凯 姚建铨

耿兴宁, 徐德刚, 李吉宁, 等. 太赫兹波在飞行器等离子体鞘套中的传输特性[J]. 强激光与粒子束, 2020, 32: 033101. doi: 10.11884/HPLPB202032.190291
引用本文: 耿兴宁, 徐德刚, 李吉宁, 等. 太赫兹波在飞行器等离子体鞘套中的传输特性[J]. 强激光与粒子束, 2020, 32: 033101. doi: 10.11884/HPLPB202032.190291
Geng Xingning, Xu Degang, Li Ji’ning, et al. Propagation characteristics of terahertz wave in plasma sheath around air vehicle[J]. High Power Laser and Particle Beams, 2020, 32: 033101. doi: 10.11884/HPLPB202032.190291
Citation: Geng Xingning, Xu Degang, Li Ji’ning, et al. Propagation characteristics of terahertz wave in plasma sheath around air vehicle[J]. High Power Laser and Particle Beams, 2020, 32: 033101. doi: 10.11884/HPLPB202032.190291

太赫兹波在飞行器等离子体鞘套中的传输特性

doi: 10.11884/HPLPB202032.190291
基金项目: 国家自然科学基金项目(61705162);装备预研基金重点项目(6140415010202)
详细信息
    作者简介:

    耿兴宁(1995—),男,硕士研究生,主要从事太赫兹波与等离子体方向研究;gengxingning@tju.edu.cn

    通讯作者:

    李吉宁(1984—),男,博士,讲师,主要从事太赫兹技术与太赫兹器件方向研究;jiningli@tju.edu.cn

  • 中图分类号: TN29

Propagation characteristics of terahertz wave in plasma sheath around air vehicle

  • 摘要: 针对临近空间飞行器的黑障问题,根据模拟的RAM C-III飞行器周围的流场分布结果,计算了等离子体电子密度和碰撞频率,并根据其分布建立了非均匀的等离子体模型。在此基础上,利用散射矩阵方法分析了太赫兹波在等离子体中的传输特性随着等离子体密度、等离子体厚度、等离子体碰撞频率的变化以及外加磁场对传输特性的影响。结果表明,太赫兹波的传输损耗随着等离子体电子密度和等离子体厚度的增加而增加,而碰撞频率的增加会使得透射率先减小后增加。在外加磁场的作用下,左旋太赫兹波的传输特性会得到改善;而对于右旋太赫兹波,磁场的施加会引入吸收峰,并且随着磁感应强度的增加向高频方向移动。
  • 图  1  RAM C-III飞行器模型

    Figure  1.  Vehicle model of RAM C-III

    图  2  RAM C-III飞行器流场仿真

    Figure  2.  Flow field distribution simulation of RAM C-III vehicle model

    图  3  等离子体电子密度和碰撞频率分布

    Figure  3.  Plasma electron density and collision frequency distribution

    图  4  太赫兹波在等离子体鞘套中传输的分层模型

    Figure  4.  Stratification of terahertz wave propagation in plasma sheath

    图  5  不同等离子体电子密度下太赫兹波在等离子体中的传输特性

    Figure  5.  Propagation characteristics of terahertz wave in plasma with different plasma electron density

    图  6  不同等离子体碰撞频率下太赫兹波在等离子体中的传输特性

    Figure  6.  Propagation characteristics of terahertz wave in plasma with different plasma collision frequency

    图  7  不同等离子体厚度下太赫兹波在等离子体中的传输特性

    Figure  7.  Propagation characteristics of terahertz wave in plasma with different plasma thickness

    图  8  外加磁场对于左旋太赫兹波传输特性的影响

    Figure  8.  Effect of external magnetic field on propagation characteristics of left-handed polarized terahertz wave

    图  9  外加磁场对于右旋太赫兹波传输特性的影响

    Figure  9.  Effect of external magnetic field on propagation characteristics of right-handed polarized terahertz wave

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出版历程
  • 收稿日期:  2019-08-11
  • 修回日期:  2019-11-21
  • 刊出日期:  2020-02-10

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