Three-dimensional Numerical Investigation of Electron Transport with Rotating Spoke in a Cylindrical Anode Layer Hall Plasma Accelerator
Three-dimensional Numerical Investigation of Electron Transport with Rotating Spoke in a Cylindrical Anode Layer Hall Plasma Accelerator
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DOI：
10.1063/1.4740066
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发表时间：
2012-07
影响因子：
2.2
通讯作者：
D. Tang;S. Geng;X. Qiu;P. Chu
中科院分区：
文献类型：
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作者：
D. Tang;S. Geng;X. Qiu;P. Chu
通过三维粒子池数值模拟，研究了圆柱形阳极层霍尔等离子体加速器中磁场和压力增加对旋转轮辐电子输运的影响。电子输运与辐条的方位角旋转具有12.5MHz的频率。它沿E × B漂移方向传播，传播速度约为1.0 × 106 m/s（约为E × B漂移速度的37%）。局部电荷分离的发生是因为方位角局部电子密度浓度伴随着几乎均匀的方位角离子分布。非轴对称的电子密度集中和轴对称的离子分布在等离子体放电区引入了两个方向相反的方位电场。在外加Eθ × B场作用下，激发出轴向电子剪切流。旋转轮辐的反常电子输运可能是由两个方向相反的方位电场引起的轴向电子剪切流引起的。
The effects of increased magnetic field and pressure on electron transport with a rotating spoke in a cylindrical anode layer Hall plasma accelerator are investigated by three-dimensional particle-in-cell numerical simulation. The azimuthal rotation of electron transport with the spoke has a frequency of 12.5 MHz. It propagates in the direction of the E × B drift at a speed of ∼1.0 × 106 m/s (about 37% of the E × B drift speed). Local charge separation occurs because the azimuthal local electron density concentration is accompanied by an almost uniform azimuthal ion distribution. The non-axisymmetrical electron density concentration and axisymmetrical ion distribution introduce two azimuthal electric fields with opposite directions in the plasma discharge region. The axial electron shear flow is excited under the additional Eθ × B field. The anomalous electron transport with the rotating spoke may be attributed to the axial electron shear flow induced by the two azimuthal electric fields with opposite dir...