【摘要】 利用激光体烧蚀模型,数值模拟了激光驱动飞片的加速过程,包括激光的吸收和飞片的速度历史等。在光强为GW/cm2量级的激光作用下,激光烧蚀产生的等离子体的流体力学运动可用改编的1维La-grange流体力学计算程序SSS来描述。通过计算得到不同激光能量下的飞片密度剖面,由此给出金属薄膜的烧蚀深度与实验测量值进行比对,二者符合得较好。更多还原

【Abstract】 A one-dimensional bulk absorption model to simulate the accelerating process of laser-driven flyer plate is presented,in which the laser energy deposition,the laser absorption in plasma and acceleration of flyer plates are included.In the laser intensity range of GW/cm2,the gasdynamical behavior of the ablated foil plasma is described with a modified one-dimensional Lagrangian hydrodynamic code.The histories of the flyer velocity and the density profiles are given by this model.The calculated results of the ablated thickness of films in the launch of laser-driven flyer plates are in good agreement with the experimental results.更多还原