In this paper, a two-dimensional (2D) kinetic modeling on the ion extraction process in a decaying barium plasma with a Π-type electrode configuration is performed using an open-source particle-in-cell computer code, WARP. An important phenomenon predicted by the 2D simulation is that the electric potential at the plasma bulk is lower than that of the anode after the transient sheath forms. This is quite different from the commonly believed modeling results using the electron-equilibrium fluid model. The appearance of this reduced voltage drop between the plasma bulk and cathode surface (Δ V ) is explained physically from the global balance of the extracted ion and electron currents. The analytically predicted values of Δ V are qualitatively consistent with those from the kinetic modeling under different initial plasma densities and externally applied voltages. This work is helpful for optimizing the ion extraction efficiency with a Π-type electrode configuration in f...

中文翻译：

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带有π型电极配置的衰减等离子体中带电粒子传输过程的建模

在本文中，使用开放源代码的单元内粒子计算机代码WARP，对具有Π型电极配置的衰减钡等离子体中的离子提取过程进行了二维（2D）动力学建模。二维模拟预测的一个重要现象是，在形成瞬态鞘层之后，等离子体的电势低于阳极的电势。这与通常认为的使用电子平衡流体模型的建模结果完全不同。从提取的离子流和电子流的总体平衡中，物理地解释了在等离子体块与阴极表面之间的这种减小的电压降的出现（ΔV）。在不同的初始等离子体密度和外部施加的电压下，ΔV的分析预测值与动力学模型得出的值在质量上一致。这项工作有助于优化π型电极结构在离子液体中的离子提取效率。