Advances in Space Research ( IF 2.8 ) Pub Date : 2021-07-01 , DOI: 10.1016/j.asr.2021.06.020 S. Davood Sadatian , M. Gharjeh ghiyaei
By introducing the Kappa distribution function () and considering the dimensionless variables and applying them to the Poisson equation, the Bohm sheath equation in a plasma is obtained. We know the above distribution function has two important factors: 1-the invariant kappa spectral index (), 2-the number of degrees of freedom (). In this regard, we considered soliton with positive and negative potentials in the two areas of the solar structure Heliosphere (positive potential: near equilibrium areas and negative potential Heliosheath: out of equilibrium areas ). Then, the Korteweg-de-Vries equation (KdV) is obtained using the Bohm criterion and applying the Sagdeev pseudo potential method and effects of the spectral index , the potential degrees of freedom via perturbation are studied numerically.
中文翻译:
空间环境尘埃等离子体中的广义玻姆鞘判据
通过引入 Kappa 分布函数() 并考虑无量纲变量并将它们应用于泊松方程,得到等离子体中的玻姆鞘方程。我们知道上面的分布函数有两个重要的因素:1-不变的kappa谱指数(), 2-自由度数 ()。在这方面,我们考虑了太阳结构日光层两个区域中具有正负电位的孤子(正电位:接近平衡区域 和负电位 Heliosheath:超出平衡区域 )。然后,使用 Bohm 准则并应用 Sagdeev 伪电位方法和光谱指数的影响,获得 Korteweg-de-Vries 方程 (KdV), 潜在的自由度 通过扰动进行数值研究。