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Effect of high-Z dopant on the laser-driven ablative Richtmyer–Meshkov instability

Published online by Cambridge University Press:  15 May 2017

B. Xu ,
Y. Ma ,
X. Yang ,
W. Tang ,
S. Wang ,
Z. Ge ,
Y. Zhao  and
Y. Ke
B. Xu*
Affiliation:
College of Science, National University of Defense Technology, Changsha 410073, China
Y. Ma
Affiliation:
College of Science, National University of Defense Technology, Changsha 410073, China
X. Yang
Affiliation:
College of Science, National University of Defense Technology, Changsha 410073, China
W. Tang
Affiliation:
College of Science, National University of Defense Technology, Changsha 410073, China
S. Wang
Affiliation:
College of Science, National University of Defense Technology, Changsha 410073, China
Z. Ge
Affiliation:
College of Science, National University of Defense Technology, Changsha 410073, China
Y. Zhao
Affiliation:
College of Science, National University of Defense Technology, Changsha 410073, China
Y. Ke
Affiliation:
College of Science, National University of Defense Technology, Changsha 410073, China
*
Address correspondence and reprint requests to: B. Xu, College of Science, National University of Defense Technology, Changsha 410073, China. E-mail: xubb2010@163.com
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Abstract

The effects of high-Z dopant on the laser-driven ablative Richtmyer–Meshkov instability (RMI) are investigated by theoretical analysis and radiation hydrodynamics simulations. It is found that the oscillation amplitude of ablative RMI depends on the ablation velocity, the blow-off plasma velocity and the post-shock sound speed. Owing to enhancing the radiation at the plasma corona and increasing the radiation temperature at the ablation front, the high-Z dopant in plastic target can significantly increase the ablation velocity and the blow-off plasma velocity, leading to an increase in oscillation frequency and a reduction in oscillation amplitude of the ablative RMI. The high-Z dopant in plastic target is beneficial to reduce the seed of ablative Rayleigh–Taylor instability. These results are helpful for the design of direct drive inertial confinement fusion capsules.

Keywords

Ablative Richtmyer–Meshkov instabilityOscillation behaviorRadiation hydrodynamics
Type
Research Article
Information
Laser and Particle Beams , Volume 35 , Issue 2 , June 2017 , pp. 366 - 372
Copyright
Copyright © Cambridge University Press 2017 

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References

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