中国物理B ›› 2002, Vol. 11 ›› Issue (11): 1184-1187.doi: 10.1088/1009-1963/11/11/316

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Modulational instability of ion-acoustic waves in a warm plasma

薛具奎, 段文山, 郎和   

  1. Physics and Electronics Engineering College, Northwest Normal University, Lanzhou 730070, China
  • 收稿日期:2002-03-07 修回日期:2002-05-10 出版日期:2002-11-12 发布日期:2005-06-12
  • 基金资助:
    Project supported by the "Creation of Science and Technology" Foundation of Northwest Normal University, China (Grant No NWNU-KJCXGC-215).

Modulational instability of ion-acoustic waves in a warm plasma

Xue Ju-Kui (薛具奎), Duan Wen-Shan (段文山), Lang He (郎和)   

  1. Physics and Electronics Engineering College, Northwest Normal University, Lanzhou 730070, China
  • Received:2002-03-07 Revised:2002-05-10 Online:2002-11-12 Published:2005-06-12
  • Supported by:
    Project supported by the "Creation of Science and Technology" Foundation of Northwest Normal University, China (Grant No NWNU-KJCXGC-215).

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摘要： Using the standard reductive perturbation technique, a nonlinear Schr?dinger equation is derived to study the modulational instability of finite-amplitude ion-acoustic waves in a non-magnetized warm plasma. It is found that the inclusion of ion temperature in the equation modifies the nature of the ion-acoustic wave stability and the soliton structures. The effects of ion plasma temperature on the modulational stability and ion-acoustic wave properties are investigated in detail.

Abstract: Using the standard reductive perturbation technique, a nonlinear Schr?dinger equation is derived to study the modulational instability of finite-amplitude ion-acoustic waves in a non-magnetized warm plasma. It is found that the inclusion of ion temperature in the equation modifies the nature of the ion-acoustic wave stability and the soliton structures. The effects of ion plasma temperature on the modulational stability and ion-acoustic wave properties are investigated in detail.

Key words: reductive perturbation technique, warm plasma, ion-acoustic waves, modulational instability

中图分类号:  (Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.))

  • 52.35.Py
52.35.Sb (Solitons; BGK modes) 52.35.Fp (Electrostatic waves and oscillations (e.g., ion-acoustic waves)) 03.65.Ge (Solutions of wave equations: bound states)