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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(particleincell)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.
The two-dimensional particle-grid method was used to simulate the discharge plasma in a cylindrical anode Hall-accelerator, and the collisions between charged particles and neutral particles were dealt with by the Monte Carlo collision method. The distribution of ions and electrons and the motion of ion current were calculated and the energy distribution outside the outlet was calculated.The results show that the magnetic field of the cylindrical anode layer plasma accelerator has a significant restraint on the electrons and the electrons are concentrated in a small area near the anode Due to the special distribution of the electromagnetic field, the ion current presents a bimodal distribution, and the ion energy ranges from about 20% of the discharge voltage to about the discharge voltage with an average energy of between 40% and 50% of the discharge voltage.