摘要
在低速太阳风中，在离子声波湍动已经激发的区域，可以产生沿着一定方向运动的逃逸电子束．该电子束可以激发起强烈的纵等离子激元的湍动．朗缪尔波的主要吸收机制是通过等离子体热电子的非线性散射，朗缪尔波受激转换为离子声波．这种转换伴随着电子的迅速加热，几乎所有纵等离子激元的能量都转移给散射电子，导致低速太阳风中电子的温度高于质子的温度．
In low-sped solar wind, at a region Where ion- acoustic wave turbulence had already been excited, the electrons considered move predominantly in one direction and thus form a electron beam which strongly excites longitudinal plasma turbulence as the velocity of the accelerated electrons is greater than its thermal velocity. A rather strong Langmuir turbulence can be excited by the electron beam. The main absorption mechanism for the Langmuir waves is the stimulated conversion of Langmuir waves into ion-acoustic waves through the non-linear scattering by the thermal eledrons. This conversion is accompanied by a fast heating of the electrons as almost all the energy of a longitudinal plasmon is transferred to the scattering electrons and causes electron temperature is greater than that of protons.
出处
《北京师范大学学报（自然科学版）》
CAS
CSCD
北大核心
1999年第2期191-194,共4页
Journal of Beijing Normal University(Natural Science)
基金
国家自然科学基金!19791090
关键词
低速太阳风
朗缪尔波
电子
随机湍动加热
太阳风
low-speed solar wind
Langmuir waves
stochastic turbulence heating for electrons
