SYMMETRIC CONFIGURATIONS OF LASER SOURCES FOR DIRECT-DRIVE TARGET. TETRAHEDRAL SYMMETRY
S. A. Belkov, S. V. Bondarenko, L. V. Solnyshkova
VANT. Ser.: Mat. Mod. Fiz. Proc 2023. Вып.3. С. 67-79.
The paper describes the method of building symmetric laser irradiation systems with a higher level of illuminating a hohlraum. Optimal configurations of laser sources having tetrahedron rotation symmetries were found for directly driving a spherical target and capabilities of these configurations were examined from the viewpoint of achievable levels of uniformly illuminating the hohlraum by laser beams. A criterion is proposed to estimate the efficiency of configurations of laser sources. The comparison has been made between the efficiency of reducing the lowest modes in the laser illumination structure for a spherical hohlarum in zonal configurations of laser sources constructed on the base of Gauss-Legendre quadrature and in configurations with tetrahedral symmetry. Keywords: inertial confinement fusion, direct-drive target, target illumination uniformity, zonal and symmetric irradiation systems, tetrahedral symmetry.
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