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2D Modeling of thermal smoothing of laser imprint in a double-pulse plasma

Published online by Cambridge University Press:  01 October 1999

I.G. LEBO ,
A.B. ISKAKOV ,
J. LIMPOUCH ,
K. MASHEK ,
K. ROHLENA  and
V.F. TISHKIN
I.G. LEBO
Affiliation:
Lebedev Physical Institute (FIAN), Leninsky Prospect 53, Moscow, 1179224, Russia
A.B. ISKAKOV
Affiliation:
Institute of Mathematical Modeling (IMM), Miusskaya sq.4, Moscow, 125047, Russia
J. LIMPOUCH
Affiliation:
Faculty of Nuclear Science and Physical Engineering, Czech Technical University, Brehove 7, 115 19 Prague 1, Czech Republic
K. MASHEK
Affiliation:
Institute of Physics of the Academy of Sciences of the Czech Republic, Na Slovance 2, 180 40 Prague 8-Libe, Czech Republic
K. ROHLENA
Affiliation:
Institute of Physics of the Academy of Sciences of the Czech Republic, Na Slovance 2, 180 40 Prague 8-Libe, Czech Republic
V.F. TISHKIN
Affiliation:
Institute of Mathematical Modeling (IMM), Miusskaya sq.4, Moscow, 125047, Russia
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Abstract

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.

Type
Research Article
Information
Laser and Particle Beams , Volume 17 , Issue 4 , October 1999 , pp. 759 - 763
Copyright
1999 Cambridge University Press

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