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核聚变与等离子体物理 ›› 2008, Vol. 28 ›› Issue (2): 125-128.

• 等离子体物理学 • 上一篇    下一篇

激光等离子体中的强朗缪尔湍动谱分析

刘笑兰,刘三秋,杨小松   

  1. (南昌大学理学院,南昌 330027)
  • 收稿日期:2007-06-20 修回日期:2008-02-12 出版日期:2008-06-15 发布日期:2011-02-21
  • 作者简介:刘笑兰(1971-),女,汉,江西奉新人,讲师,博士研究生,研究方向:激光等离子体。
  • 基金资助:

    教育部新世纪优秀人才支持计划资助(NCET-05-0575);江西省跨世纪学术和技术带头人培养计划资助项目(040010);江西省科技攻关计划项目(20061B0402100);江西省自然科学基金资助项目(2007GZW2054)

The spectra of strong Langmuir turbulence in a laser-plasma

LIU Xiao-lan, LIU San-qiu, YANG Xiao-song   

  1. (College of Physics, Nanchang University, Nanchang 330027)
  • Received:2007-06-20 Revised:2008-02-12 Online:2008-06-15 Published:2011-02-21

摘要:

通过数值计算完全的萨哈罗夫方程,得到了朗缪尔波能量密度谱图。从一系列的谱图中可以看出,波的塌缩过程是沿着能量密度谱由小波数区域向大波数区域转移,朗缪尔波在塌缩过程中出现成丝现象。通过对获得的朗缪尔波平均能量密度谱进行拟合,得到了朗缪尔波能量密度谱函数。

关键词: 激光等离子体, 强朗缪尔湍动, 能量密度谱, 坍塌, 能量均分

Abstract:

The spectra of strong Langmuir turbulence (SLT) are numerically obtained by calculating the complete Zakharov equations near the critical surface in a laser-plasma. The obtained figures show that Langmuir wave collapse is the main mechanism of energy transfer along the SLT spectra from the small-k region to the large-k region, and the Langmuir wave appears to be filament during the SLT collapse. Fitting the average energy density of Langmuir wave, the energy density function of Langmuir spectrum is obtained.

Key words: Laser-plasma, Strong Langmuir turbulence, Spectrum of energy density, Collapse, Energy equipartition.

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