Theoretical Studies of Laser Light Interaction and Optical and X-Ray Emission from Dense Metallic Plasmas

摘要

The behavior of the pulse of a high intensity laser beam is investigated as the beam penetrates into a low temperature high density plasma. Given the physical characteristics of the target plasma a study is made of the evolution of the incident laser pulse as it propagates through the plasma. A study is made of the dynamics of the strongly turbulent plasma generated by the interaction of an intense laser beam and the background plasma. The strongly turbulent plasma can be viewed as a collection of localized highly nonlinear electric field structures (solitons). The behavior of a laser heated aluminum exploding wire plasma is investigated by means of a radiation transport mdoel for line radiation. MHD computer codes with nonequilibrium ionization dynamics are developed for the analysis. The physics of a strongly coupled plasma is studied via an appropriate kinetic model. The dynamic structure factor which enables one to interpret the scattered light from the plasma due to laser radiation is obtained. This is very essential tool for diagnostics of such strongly coupled plasmas. (Author)