Existence domains of electrostatic solitary structures in the solar wind plasma
Existence domains of electrostatic solitary structures in the solar wind plasma
复制标题
太阳风等离子体中静电孤立结构的存在域
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
G. Lakhina
中科院分区：
文献类型：
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作者：
R. Rubia;S. Singh;G. Lakhina
静电孤波和双电层的探讨在一个均匀的，无碰撞的，磁化的三组分等离子体组成的热质子，热重离子（α粒子，He++），超热电子与kappa分布。利用Sagdeev赝势方法研究了任意振幅的离子声孤子和双电层。研究了离子数密度ni_0、谱指数κ、马赫数M和离子与电子温度比σ_i等参数对离子声孤波演化及其存在域的影响。发现随着重离子温度的变化，慢离子声孤子的存在域从负孤子/双层向正孤子/双层转变.结果表明，负势孤子的宽度随振幅的增大而增大，而正势孤子的宽度随振幅的增大而减小。
Electrostatic solitary waves and double layers are explored in a homogeneous, collisionless, and magnetized three-component plasma composed of hot protons, hot heavier ions (alpha particles, He++), and suprathermal electrons with kappa distribution. The Sagdeev pseudopotential technique is used to study the arbitrary amplitude ion-acoustic solitons and double layers. The effect of various parameters such as the number density of ions, ni0; the spectral index, κ; the Mach numbers, M; and the temperature ratio of ion to the electron σi on the evolution of ion-acoustic solitary waves as well as their existence domains is studied. The transition in the existence domain for slow-ion acoustic solitons from negative solitons/double layers to positive solitons/double layers is found to occur with a variation of the heavier ion temperature. It is observed that the width of the negative potential solitons increases as the amplitude increases, whereas for the positive potential solitons, the width decreases as the a...