A 2-D Hybrid Hall Thruster Simulation That Resolves the $\boldsymbol{E}\times \boldsymbol{B}$ Electron Drift Direction
A 2-D Hybrid Hall Thruster Simulation That Resolves the $\boldsymbol{E}\times \boldsymbol{B}$ Electron Drift Direction
复制标题
解决 $oldsymbol{E} imes oldsymbol{B}$ 电子漂移方向的二维混合霍尔推进器模拟
DOI：
10.1109/tps.2014.2356650
复制
发表时间：
2015
影响因子：
1.5
通讯作者：
M. Cappelli
中科院分区：
文献类型：
--
作者：
C. Lam;E. Fernandez;M. Cappelli
开发了环形霍尔推进器放电的二维轴向方位角模型。我们使用混合流体颗粒细胞 (PIC) 处理来模拟 Xe 推进剂霍尔推进器。使用 PIC 方法，正 Xe+ 离子被建模为无碰撞、非磁化、离散的超粒子，而电子则被视为磁化的二维流体。该模型包括连续补充的 Xe 中性背景，以及施加的径向磁场和施加的轴向电势。由于等离子体特性的准相干波动导致磁场中电子迁移率异常高，受实验证据的启发，我们使用数值模型来解析方位角电子动力学并研究波动对电子传输的影响。代表性的低电压 (100 V) 操作条件模拟预测了与实验中观察到的类似的局部等离子体特性。模拟预测了相干方位角传播扰动，这些扰动似乎有助于增强电子传输，超出了经典散射造成的影响。
A 2-D axial-azimuthal model of an annular Hall thruster discharge is developed. We use a hybrid fluid-particle-in-cell (PIC) treatment to model a Xe-propellant Hall thruster. Using a PIC approach, the positive Xe+ ions are modeled as collisionless, nonmagnetized, discrete super-particles, whereas the electrons are treated as a magnetized 2-D fluid. The model includes a continuously replenished Xe neutral background, with an imposed radial magnetic field and an applied axial electric potential. Motivated by experimental evidence of anomalously high electron mobility across the magnetic field that has been attributed to quasi-coherent fluctuations in the plasma properties, we use the numerical model to resolve azimuthal electron dynamics and study the impact of fluctuations on electron transport. Representative low-voltage (100 V) operating condition simulations predict localized plasma properties similar to those observed in experiments. The simulations predict coherent azimuthally propagating disturbances which appear to contribute to enhanced electron transport beyond that due to classical scattering.