为研究强激光电离氢原子团簇, 在理论上采用1维氢原子团簇的经典粒子动力学模型, 结合粒子对(PP)算法及粒子模拟(PIC)方法, 采用自行搭建的9节点并行集群系统, 利用消息传递接口(MPI)与OpenMP混合编程模型进行了并行数值模拟计算, 获得了较为理想的计算加速比。并且引入了弛豫时间参数, 有效地处理了粒子间的碰撞过程, 在极大简化计算量的同时, 保留了物理本质。所得模拟结果与已有的实验结果符合较好, 表明该并行计算模型是稳定、可行的。

This paper studies the parallel numerical simulation of interaction between intense laser and hydrogen clusters.Based on 1D hydrogen atom cluster model and particle-particle algorithm and PIC method,a parallel system and strategy was designed with hybrid MPI and OpenMP programming and the speedup was ideal.The relaxation time constant was also introduced to effectively handle the process of particle collision.The results of the simulation were in fairly good agreement with experimental results, which shows that this parallel computing system and model is stable and feasible.