E × B electron drift instability in Hall thrusters: Particle-in-cell simulations vs. theory
E × B electron drift instability in Hall thrusters: Particle-in-cell simulations vs. theory
复制标题
霍尔推进器中的 E × B 电子漂移不稳定性：细胞内粒子模拟与理论
DOI：
10.1063/1.5017033
复制
发表时间：
2018
影响因子：
2.2
通讯作者：
L. Garrigues
中科院分区：
文献类型：
--
作者：
J. Boeuf;L. Garrigues
E × B电子漂移不稳定性（E × B EDI），也称为电子回旋漂移不稳定性，已被观察到在最近的粒子模拟霍尔推进器，是一个可能的候选人来解释异常的电子输运通过磁场在这些设备。这种不稳定性的特征在于发展的方位角波的波长在毫米范围内和速度的顺序上的离子声速，这增强了跨磁场的电子传输。本文采用简化的二维轴向-方位Particle-In-Cell模拟方法研究了霍尔推力器加速区和近羽流区E × B EDI的发展和对流。模拟是无碰撞的，电离分布不是自洽的，而是作为模型的输入参数。目的是研究不同电离率值（即，的总离子生产率或电流）和比较…
The E × B Electron Drift Instability (E × B EDI), also called Electron Cyclotron Drift Instability, has been observed in recent particle simulations of Hall thrusters and is a possible candidate to explain anomalous electron transport across the magnetic field in these devices. This instability is characterized by the development of an azimuthal wave with wavelength in the mm range and velocity on the order of the ion acoustic velocity, which enhances electron transport across the magnetic field. In this paper, we study the development and convection of the E × B EDI in the acceleration and near plume regions of a Hall thruster using a simplified 2D axial-azimuthal Particle-In-Cell simulation. The simulation is collisionless and the ionization profile is not-self-consistent but rather is given as an input parameter of the model. The aim is to study the development and properties of the instability for different values of the ionization rate (i.e., of the total ion production rate or current) and to compar...