基于单粒子理论模型及积分算法，编写了单粒子轨道数值模拟程序——ALFA，分析了柱形和球形两种边界位形磁化等离子体靶中非热α粒子通过库仑碰撞对D-T等离子体加热的能量沉积率。在均匀背景磁场及相同的D-T等离子体密度、温度条件下，柱形边界中非热α粒子能量沉积率比球形边界更高。在相同等离子体温度及密度条件下，α粒子的能量沉积率随磁场的增大而增大，但计算结果表明，磁场的有效作用区域存在明显的上下限值，当等离子体内磁场小于下限阈值时，磁场增加对α粒子能量沉积率的提高贡献不大，而且当等离子体内磁场超过上限阈值后，磁场再增加对提高α粒子能量沉积率的作用也不明显。对不同几何尺寸的磁化等离子体靶，磁场有效作用区域的上下限值不同，靶尺寸越大，相应的上下限阈值越小。提高等离子体密度，可增加α粒子能量沉积率，也能降低磁场有效作用区域的上下限阈值。

Based on the single particle theory and integral arithmetic, the ALFA code is exploited to analyze the energy deposition of non-thermal alpha particles in cylindrical and spherical magnetized targets. It is found that, the energy deposition of alpha particles in the cylindrical magnetized target is larger than that in the spherical one under the same background magnetic field, D-T plasma density and plasma temperature; there is a work region of magnetic field for average energy deposition of alpha particles. If the magnetic field exceeds the work region, the average energy deposition stays at a constant nearly. As for the different geometry scale, the work region of the magnetic field affecting the energy deposition of alpha particles appears different. The alpha particle energy deposition increases with the D-T plasma density.