中国物理B ›› 2005, Vol. 14 ›› Issue (12): 2546-2551.doi: 10.1088/1009-1963/14/12/028

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

Laser pulse modulation instabilities in partially stripped plasma

胡强林, 刘世炳, 蒋毅坚   

  1. Institute of Laser Engineering, Beijing University of Technology,Beijing 100022, China
  • 收稿日期:2005-04-15 修回日期:2005-08-24 出版日期:2005-12-20 发布日期:2005-12-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10276002).

Laser pulse modulation instabilities in partially stripped plasma

Hu Qiang-Lin (胡强林), Liu Shi-Bing (刘世炳), Jiang Yi-Jian (蒋毅坚)   

  1. Institute of Laser Engineering, Beijing University of Technology,Beijing 100022, China
  • Received:2005-04-15 Revised:2005-08-24 Online:2005-12-20 Published:2005-12-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10276002).

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摘要： The laser pulse modulation instabilities in partially stripped plasma were discussed based on the phase and group velocities of the laser pulse and the two processes that modulation instabilities excited. The excitation condition and growth rate of the modulation instability were obtained. It was found that the positive chirp and competition between normal and abnormal dispersions play important roles in the modulation instability. In the partially stripped plasma, the increased positive chirp enhances the modulation instability, and the dispersion competition reduces it.

Abstract: The laser pulse modulation instabilities in partially stripped plasma were discussed based on the phase and group velocities of the laser pulse and the two processes that modulation instabilities excited. The excitation condition and growth rate of the modulation instability were obtained. It was found that the positive chirp and competition between normal and abnormal dispersions play important roles in the modulation instability. In the partially stripped plasma, the increased positive chirp enhances the modulation instability, and the dispersion competition reduces it.

Key words: partially stripped plasma, modulation instability, photon acceleration

中图分类号:  (Laser-plasma interactions)

  • 52.38.-r
52.35.Py (Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.))