Fusion born α particle confinement is one of the most important issues in burning plasmas, such as ITER and CFETR. However, it is extremely complex due to the nonequilibrium characteristics, and multiple temporal and spatial scales coupling with background plasma. A numerical code using particle orbit tracing method (PTC) has been developed to study energetic particle confinement in tokamak plasmas. Both full orbit and drift orbit solvers are implemented to analyze the Larmor radius effects on α particle confinement. The elastic collisions between alpha particles and thermal plasma are calculated by a Monte Carlo method. A triangle mesh in poloidal section is generated for electromagnetic fields expression. Benchmark between PTC and ORBIT has been accomplished for verification. For CFETR burning plasmas, PTC code is used for α particle source and slowing down process calculation in 2D equilibrium. In future work, 3D field like toroidal field ripples, Alfvn and magnetohydrodynamics instabilities perturbation inducing α particle transport will be analyzed.

聚变产生的α粒子约束是燃烧等离子体（如 ITER 和 CFETR）中最重要的问题之一。然而，由于非平衡特性，以及与背景等离子体耦合的多个时空尺度，它非常复杂。已经开发了使用粒子轨道追踪法 (PTC) 的数字代码来研究托卡马克等离子体中的高能粒子约束。全轨道和漂移轨道求解器均用于分析拉莫尔半径对α的影响粒子约束。α粒子和热等离子体之间的弹性碰撞通过蒙特卡罗方法计算。生成极向截面的三角形网格用于电磁场表达。PTC 和 ORBIT 之间的基准测试已经完成以供验证。对于 CFETR 燃烧等离子体，PTC 代码用于α粒子源和 2D 平衡中的减慢过程计算。在未来的工作中，将分析 3D 场，如环形场波纹、Alfvn 和磁流体动力学不稳定性扰动引起的α粒子传输。