圆柱形阳极层霍尔等离子体加速器的质点网格方法模拟

对圆柱形阳极层霍尔加速器内的放电等离子体运用二维质点网格方法（particle in cell）进行数值模拟，用蒙特卡罗碰撞方法处理带电粒子与中性粒子之间的碰撞. 得到了放电通道内离子与电子的分布以及离子流的运动，并且对出口外侧的能量分布进行了统计. 结果发现圆柱形阳极层等离子体加速器的磁场对电子有明显的约束作用，电子集中于阳极附近很小的区域内. 由于电磁场的特殊分布，离子流呈现出双峰式的分布. 离子能量范围从放电电压的20%到接近放电电压，平均能量在放电电压的40%—50%之间.关键词：质点网格方法蒙特卡罗碰撞数值模拟阳极层霍尔等离子体加速器

Particle-in-cell simulation of a cylindrical Hall anode layer plasma accelerator

The Plasma in cylindrical Hall anode layer plasma accelerator is simulated by the two-dimensional particle-in-cell method. Monte Carlo collision method is used to simulate the collision among particles. The distribution of electrons an ions, the movement of ion beam and the energy distribution of ions near the exit plane are studied. The result shows that the magnetic field effectively confines the electrons. Electrons are collected in a small region. Due to the special electromagnetic field, the ion beam has a two-peaked distribution. Near the exit plane, the ion energy ranges from 20% to 100% of the anode voltage. The average energy of ions near the exit plane is about 40%—50% of the anode voltage.