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Irradiation asymmetry effects on the direct drive targets compression for the megajoule laser facility

Published online by Cambridge University Press:  24 July 2015

N.N. Demchenko ,
I.YA. Doskoch ,
S.YU. Gus'kov ,
P.A. Kuchugov ,
V.B. Rozanov ,
R.V. Stepanov ,
G.A. Vergunova ,
R.A. Yakhin  and
N.V. Zmitrenko
N.N. Demchenko
Affiliation:
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia
I.YA. Doskoch
Affiliation:
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia
S.YU. Gus'kov
Affiliation:
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia
P.A. Kuchugov*
Affiliation:
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia Keldysh Institute of Applied Mathematics of the Russian Academy of Sciences, Moscow, Russia
V.B. Rozanov
Affiliation:
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia
R.V. Stepanov
Affiliation:
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia
G.A. Vergunova
Affiliation:
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia
R.A. Yakhin
Affiliation:
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia
N.V. Zmitrenko
Affiliation:
Keldysh Institute of Applied Mathematics of the Russian Academy of Sciences, Moscow, Russia
*
Address correspondence and reprint requests to: Pavel A. Kuchugov, Russian Federation, Miusskaya Sq. 4, 125047 Moscow, Russia. E-mail: pkuchugov@gmail.com.
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Abstract

In the previous works (Rozanov et al., 2013; 2015) we have performed one-dimensional (1D) numerical simulations of the target compression and burning at the absorbed energy of ~1.5 MJ. As a result, the target was chosen to have a low initial aspect ratio in order to be less sensitive to the influence of such parameters as laser pulse duration, total laser energy, and equations of state model. The simulation results demonstrated a higher probability of ignition and effective burning of such a system. In the present work we discuss the impact of irradiation asymmetry on this baseline target implosion. The details of the 1D compression and a possible influence of 2D and 3D effects due to the hydrodynamic instability and mixing have been described. In accordance with the 2D calculations the target is still ignited, however, the symmetry analysis of 3D ones gives reasons to further reduce the efficiency of conversion of kinetic energy into potential energy.

Keywords

Irradiation asymmetryLaser driven fusionMathematical modelingTarget stability
Type
Research Article
Information
Laser and Particle Beams , Volume 33 , Issue 4 , December 2015 , pp. 655 - 666
Copyright
Copyright © Cambridge University Press 2015 

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References

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