为了解释超强激光与等离子体相互作用时产生的自生磁场及其产生机制,从动力论出发,用理论分析和数值模拟法研究了强激光打平面薄靶时,由温度梯度和密度梯度的非共线性所决定的自生磁场,得到了自生磁场空间分布的时间演化关系。研究结果表明,当激光入射等离子体时,由于不平行的密度和温度梯度,在等离子体表面会出现自生磁场。这种磁场明显地影响激光吸收和各种输送过程。 In order to explain the spontaneous magnetic field generated by the interaction between superlattice laser and plasma and its mechanism, from the dynamical theory, the theoretical analysis and numerical simulation are used to study the effect of the intense laser on the plane thin target. The autonomic magnetic field determined by the collinearity obtained the temporal evolution of the spatial distribution of the autogenous magnetic field. The results show that when plasma is incident on the plasma, a self-generated magnetic field will appear on the plasma surface due to the non-parallel density and temperature gradient. This magnetic field significantly affects laser absorption and various delivery processes.