2D Modeling of thermal smoothing of laser imprint in a double-pulse plasma
LEBO, I.G.; ISKAKOV, A.B.; LIMPOUCH, J.; MASHEK, K.; ROHLENA, K.; TISHKIN, V.F.; LEBO I.G.; Lebedev Physical Institute (FIAN); ISKAKOV A.B.; Institute of Mathematical Modeling (IMM); LIMPOUCH J.; Czech Technical University; MASHEK K.; Institute of Physics of the Academy of Sciences of the Czech Republic; ROHLENA K.; Institute of Physics of the Academy of Sciences of the Czech Republic; TISHKIN V.F.; Institute of Mathematical Modeling (IMM)
Журнал:
Laser and Particle Beams
Дата:
1999
Аннотация:
Laser prepulse effect on thermal smoothing of non-uniformities of target illumination is studied by means of 2D Lagrangian hydrodynamics simulation, based on parameters of real experiment. A substantial smoothing effect is demonstrated in case of an optimum delay between the prepulse and main heating laser pulse. The cause of enhancement of thermal smoothing effect by laser prepulse is the formation of long hot layer between the region of laser absorption and ablation surface. Comparison with experimental results is presented.
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