利用粒子模拟程序,模拟研究了超强激光与等离子体相互作用中的电子束流不稳定性的产生机制,得到了不稳定性所激发的自生磁场的线性增长率与各向异性参数之间的函数关系。观察到了激光与等离子体相互作用时产生的饱和自生磁场在表面领域上的演化过程,发现沿x方向出现的电流比较大时,饱和自生的磁场在z方向的发展比较快,临界面附近较大,但随着深度的增加,逐渐以指数形式减少。 The generation mechanism of the electron beam instability in the interaction between the superlaser and the plasma was studied by using the particle simulation program. The linear growth rate and the anisotropy parameter of the autogenous magnetic field excited by the instability were obtained Functional relationship. The evolution of saturated autofluous magnetic field generated in the interaction between laser and plasma was observed in the surface area. It was found that when the current in the x direction is relatively large, the saturation self-generated magnetic field develops rapidly in the z-direction, and the vicinity of the critical surface is larger , But gradually decreased exponentially as depth increased.