超短脉冲激光与稀薄等离子体相互作用的准静态粒子模拟研究

Quasi-static particle simulation of short pulse laser-plasma interaction

具体讨论准静态近似在粒子模拟技术中的实现方法 ,主要包括 :简化物理模型的建立 ,数值模拟方法的实现 ,程序结构的建立 .最后 ,给出了三个成功的数值模拟结果 ,短脉冲激光的自聚焦现象、激光尾流场的激发和自生磁场现象 。

We have successfully developed the two-dimensional quasi-static particle simulation code MLPIC2D, which is an effective numerical tool to be used to describe the long-time plasma behavior under the action of an ultra high intensity short pulse laser. Simple physical modeling, numerical realization and code framework are discussed in detail. Three nonlinear phenomena of laser-plasma interaction: 1) production of laser wake-fields, 2) relativistic focusing for short laser pulses, 3) quasi-static magnetic fields, are correctly simulated and analysed.