Although it has been demonstrated that high-Z doped plastic can suppress the Rayleigh–Taylor instability, its usability in direct-drive implosion design on mega-joule class reactors is still controversial. In this study, the radiation hydrodynamics code was validated by a planar target experiment of a brominated plastic target, since the result including high-Z strongly depends on the opacity model. Opacity for bromine ion based on the detailed configuration accounting model has better agreement with the experimental results compared to that of the average-ion model. Two-dimensional implosion simulations assuming a mega-joule driver were also conducted to estimate whether a brominated plastic ablator can suppress the hydrodynamic instability. It was revealed that a brominated plastic, which has an appropriate fraction of doping, can assist the generation of a high-density core by suppression of the hydrodynamic instability. A high-Z doped target can suppress the Rayleigh–Taylor instability at the foot-drive phase when the laser intensity is relatively low.
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December 2016
Research Article|
December 23 2016
Numerical demonstration of high-Z doping scheme on ignition-relevant scale implosion
T. Shiroto
;
T. Shiroto
a)
1Department of Aerospace Engineering,
Tohoku University
, Sendai, Miyagi 980-8579, Japan
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N. Ohnishi;
N. Ohnishi
1Department of Aerospace Engineering,
Tohoku University
, Sendai, Miyagi 980-8579, Japan
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A. Sunahara
;
A. Sunahara
2
Institute for Laser Technology
, Suita, Osaka 565-0871, Japan
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S. Fujioka
;
S. Fujioka
3Institute of Laser Engineering,
Osaka University
, Suita, Osaka 565-0871, Japan
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A. Sasaki
A. Sasaki
4Kansai Photon Science Institute,
National Institutes for Quantum and Radiological Science and Technology
, Kizugawa, Kyoto 619-0215, Japan
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a)
Electronic mail: tshiroto@rhd.mech.tohoku.ac.jp
Phys. Plasmas 23, 122705 (2016)
Article history
Received:
May 28 2016
Accepted:
December 05 2016
Citation
T. Shiroto, N. Ohnishi, A. Sunahara, S. Fujioka, A. Sasaki; Numerical demonstration of high-Z doping scheme on ignition-relevant scale implosion. Phys. Plasmas 1 December 2016; 23 (12): 122705. https://doi.org/10.1063/1.4972546
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