Hatami M M
Physics Department of K. N. Toosi University of Technology, 15418-49611, Tehran, Iran.
Sci Rep. 2021 May 5;11(1):9531. doi: 10.1038/s41598-021-88894-1.
Multi-component active plasmas are modeled in the presence of a constant oblique magnetic field by using the hydrodynamics equations. Assuming the electrons and negative ions have Boltzmann distribution and the positive ions have finite temperature, the sheath formation criterion is derived by analyzing the Sagdeev potential. It is found that the Bohm velocity of positive ions depends sensitively on the plasma parameters such as ion-neutral collision frequency, electron impact ionization frequency, positive and negative ion temperatures, initial densities of the charged particles and direction of the applied magnetic field. Also, using our obtained Bohm criterion, the sheath properties of an active magnetized plasma consisting of electrons and positive and negative ion species are investigated numerically and the results are compared with the results of a similar quiescent plasma.
通过使用流体动力学方程，对存在恒定倾斜磁场情况下的多组分有源等离子体进行建模。假设电子和负离子具有玻尔兹曼分布，正离子具有有限温度，通过分析萨德耶夫势得出鞘层形成准则。研究发现，正离子的玻姆速度敏感地依赖于等离子体参数，如离子-中性粒子碰撞频率、电子碰撞电离频率、正离子和负离子温度、带电粒子的初始密度以及外加磁场方向。此外，利用我们得到的玻姆准则，对由电子、正离子和负离子组成的有源磁化等离子体的鞘层特性进行了数值研究，并将结果与类似静态等离子体的结果进行了比较。
