激光等离子体中的强朗缪尔湍动谱分析  

The spectra of strong Langmuir turbulence in a laser-plasma

作　　者：刘笑兰[1] 刘三秋[1] 杨小松[1] 

机构地区：[1]南昌大学理学院,南昌330027

出　　处：《核聚变与等离子体物理》2008年第2期125-128,共4页Nuclear Fusion and Plasma Physics

基　　金：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)

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。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.

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 

分 类 号：O533[理学—等离子体物理]