We focused our discussions on the mechanism of saturation of the wakefield and the electron parametric instabilities which affect the process of the wakefield generation and electrons acceleration . we developed a 2 - dimension distributed parallel pic code under mpi parallel environment and got a good speedup ratio tested on yh - iv and pc computer groups 为了解决研究激光和稀薄等离子体相互作用所需的大量计算，我们研制了21 2d分布式粒子模拟并行程序，在微机群和巨型机yh ? iv对程序并行性能进行了测试得到了较高的加速比。
