A 2D MODEL OF LASER RADIATION PROPAGATION AND ABSORPTION IN ICF TARGETS WITH THE ACCOUNT FOR REFRACTION
A. V. Vronsky, M. N. Chizhkov, A. A. Shestakov
VANT. Ser.: Mat. Mod. Fiz. Proc 2017. Вып.4. С. 14-24.
A 2D model is presented for laser radiation transfer and absorption in axisymmetric medium with the account for deflection and reflection of laser beams in geometrical optics approximation. Two approaches are considered. The density and the temperature of the electrons inside the counting cell are considered constant in the first approach, and the light beam trajectory inside the cell is a straight line. At the boundary between the cells with different cells there is either deflection or reflection of the beam in compliance with the laws of geometrical optics. At the second approach gradients of the density and temperature of electrons inside the cell are presumed to be constant and the trajectory of the beam in the cell has a parabolic shape. Additional correction of the beam direction is done at the cell boundary if necessary. There are test results for the proposed model done with the problems that have exact solution. Keywords: laser radiation transfer, refraction.
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