Nonlinear Dynamics of Laser Interaction with High Z Plasma |
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Authors: | ZHANG Jiatai CHANG Tieqiang N E Andreev |
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Institution: | 1. Institute of Applied Physics and Computational Mathematics, P. O. Box 8009, Beijing 100088, China;
2. High Energy Density Research Center, Joint Institute for High Temperatures, The Russian Academy of Sciences, Moscow 127412, Russia |
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Abstract: | The formation and evolution of a plasma in the interaction of laser radiation with gold targets are studied by computer simulations using MHD code (ESC-CASTOR). The nonlinear features of the interaction including the absorption of laser radiation, heating of the plasma components, and the deformation of the density profile under the action of the ponderomotive force are discussed. The role of these nonlinear effects together and the influence of the radiative and collisional transport in the evolution of the density profile are discussed based on the numerically obtained two-dimensional dynamical structures of the hydrodynamic parameter (electron density ne, ion density ni, electron temperature Te, ion temperature Ti), radiation temperature Tr, ponderomotive force profile, and the space-time dependencies of the absorption efficiency and the ionization rates. The radiation spectrum is analyzed and the regularities in the motion of the critical density surface are clarified. |
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Keywords: | laser-target interaction plasma dynamic simulation |
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