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Target design for high fusion yield with the double Z-pinch-driven hohlraum
A key demonstration on the path to inertial fusion energy is the achievement of high fusion yield (hundreds of MJ) and high target gain. Toward this goal, an indirect-drive high-yield inertial confine...
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Role of hydrodynamics simulations in laser-plasma interaction predictive capability
Efforts to predict and control laser-plasma interactions (LPI) in ignition hohlraum targets for the National Ignition Facility [G. H. Miller et al., Opt. Eng. 43, 2841 (2004)] are based on plasma cond...

Simulation and design study of cryogenic cone shell target for Fast Ignition Realization Experiment project

Phys. Plasmas 14, 056303 (2007); doi:10.1063/1.2671124

Published 23 March 2007

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Hideo Nagatomo, Tomoyuki Johzaki, and Tatsufumi Nakamura
Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan

Hitoshi Sakagami
National Institute for Fusion Science, Oroshi-cho, Toki, Gifu 509-5292, Japan

Atsushi Sunahara
Institute for Laser Technology, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan

Kunioki Mima
Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871, Japan
In the fast ignition (FI) scheme, at first, high-density fuel core plasma is assembled by implosion laser, and is then heated by petawatt laser to achieve a fusion burning condition. The formation of high-density fuel core plasma is one of the key issues for FI. A typical target for FI is a shell fitted with a reentrant gold cone to make a pass for heating laser. The ablated plasma of gold cone interferes with the implosion dynamics, which is quite different from that of the conventional central-hot-spot approach. Therefore, the dynamics of a nonspherical implosion must be controlled to assemble high density and high areal density. Numerical simulations are performed to study radiation hydrodynamics of cone-guided implosions. In the results, the effect of the cone on implosion dynamics is clarified. The cone surface is irradiated by the radiation and ablated plasma affects the imploding shell. Coating on the cone, which tamps the gold plasma, is effective to improve the implosion performance, although the result does not satisfy the condition of core plasma for the first stage of the Fast Ignition Realization Experiment [K. Mima et al., Proceedings of the IAEA Fusion Energy Conference, Lyon, 2002 (IAEA, Vienna, 2002), Paper No. IAEA-CN-94/IF/03]. ©2007 American Institute of Physics
History: Received 13 November 2006; accepted 22 January 2007; published 23 March 2007
Permalink: http://link.aip.org/link/?PHPAEN/14/056303/1

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KEYWORDS and PACS

Keywords
PACS
  • 52.57.Kk
    Fast laser ignition of compressed fusion fuels
  • 52.50.Jm
    Plasma production and heating by laser beams including laser–foil, laser–cluster, etc
  • 52.50.Lp
    Plasma production and heating by shock waves and compression
  • 52.38.Mf
    Laser ablation
  • 28.52.Cx
    Fusion reactor fueling, heating and ignition
  • 28.52.Av
    Fusion reactor theory, design, and computerized simulation
  • YEAR: 2007

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ISSN:
1070-664X (print)   1089-7674 (online)
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