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 為了解決研究激光和稀薄等離子體相互作用所需的大量計(jì)算,我們研制了21 2d分布式粒子模擬并行程序,在微機(jī)群和巨型機(jī)yh ? iv對(duì)程序并行性能進(jìn)行了測(cè)試得到了較高的加速比。