论文标题
血浆鞘研究使用介电壁的电子发射的物理处理
Plasma sheath studies using a physical treatment of electron emission from a dielectric wall
论文作者
论文摘要
当血浆鞘在介电壁旁边形成时，材料特性决定了从表面的吸收和反射，从而影响了鞘的形成和结构。这种相互作用的低能量状态通常在发射鞘模拟中不严格考虑，而是根据量子机械第一原理进行建模，并且对等离子体推进器和融合设备具有重要的应用。在这项工作中，在连续动力学框架中以边界条件实现了低能电子的反射，并在高排放案例中模拟鞘层以用于介电材料参数。此处介绍的结果表明，材料参数可以对所得的鞘谱和颗粒分布函数产生重大影响。具有高反射率的表面参见空间充电有限鞘的形成。
When a plasma sheath forms next to a dielectric wall, material properties determine electron absorption and reflection from the surface, impacting the sheath formation and structure. The low energy regime of this interaction is often not considered rigorously in emissive sheath simulations, but may be modeled from quantum mechanical first principles, and has important applications to plasma thrusters and fusion devices. In this work, low energy electron reflection from the wall is implemented as a boundary condition in a continuum kinetic framework and the sheath is simulated for dielectric material parameters in high and low emission cases. The results presented here demonstrate that the material parameters can have significant effect on the resulting sheath profile and particle distribution functions. Surfaces with high reflection rates see the formation of a space-charge limited sheath.
