Numerical demonstration of high-Z doping scheme on ignition-relevant scale implosion

T. Shiroto, N. Ohnishi, A. Sunahara, S. Fujioka, A. Sasaki

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Article number122705
JournalPhysics of Plasmas
Volume23
Issue number12
DOIs
Publication statusPublished - 2016 Dec 1

ASJC Scopus subject areas

  • Condensed Matter Physics

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