中国物理B ›› 2007, Vol. 16 ›› Issue (8): 2449-2454.doi: 10.1088/1009-1963/16/8/049

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Density cavities generated by plasma--field interactions in the far wake region of a space vehicle

李晓卿1, 罗青2, 胡涛平3   

  1. (1)College of Physical Science and Technology, Nanjing Normal University, Nanjing 210097, China; (2)Department of Physics, Nanjing Xiaozhuang College, Nanjing 210017, China; (3)Laboratory of Photonics and Optical Communications, School of Electronic Science and Engineering, Southeast University, Nanjing 210096,China;College of Information Science and Technology, Nanjing Forestry University, Nanjing 210037, China
  • 收稿日期:2006-09-28 修回日期:2006-11-24 出版日期:2007-08-20 发布日期:2007-08-20
  • 基金资助:
    Project supported by the Nanjing Forestry University Foundation, China (Grant No~163070019).

Density cavities generated by plasma--field interactions in the far wake region of a space vehicle

Hu Tao-Ping(胡涛平)a)b), Luo Qing(罗青)c), and Li Xiao-Qing(李晓卿)d)   

  1. a Laboratory of Photonics and Optical Communications, School of Electronic Science and Engineering, Southeast University, Nanjing 210096, China; b College of Information Science and Technology, Nanjing Forestry University, Nanjing 210037, China; c Department of Physics, Nanjing Xiaozhuang College, Nanjing 210017, China; d College of Physical Science and Technology, Nanjing Normal University, Nanjing 210097, China
  • Received:2006-09-28 Revised:2006-11-24 Online:2007-08-20 Published:2007-08-20
  • Supported by:
    Project supported by the Nanjing Forestry University Foundation, China (Grant No~163070019).

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摘要： Under the consideration of non-steady case, a set of equations is derived, which describes the non-steady nonlinear interactions between plasma and field in the far wake region of a space vehicle. Numerical calculations are also made and the numerical results show that density cavities and electromagnetic solitary waves are generated due to the modulation instability, if the envelope of high frequency modulation field is strong enough. This is of great significance to the detection of disguised space vehicles.

关键词: plasmas, modulation instability, density cavity

Abstract: Under the consideration of non-steady case, a set of equations is derived, which describes the non-steady nonlinear interactions between plasma and field in the far wake region of a space vehicle. Numerical calculations are also made and the numerical results show that density cavities and electromagnetic solitary waves are generated due to the modulation instability, if the envelope of high frequency modulation field is strong enough. This is of great significance to the detection of disguised space vehicles.

Key words: plasmas, modulation instability, density cavity

中图分类号:  (Plasma interactions (nonlaser))

  • 52.40.-w
52.35.Hr (Electromagnetic waves (e.g., electron-cyclotron, Whistler, Bernstein, upper hybrid, lower hybrid)) 52.35.Mw (Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.)) 52.35.Py (Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.)) 52.35.Sb (Solitons; BGK modes)