Change in inertial confinement fusion implosions upon using an ab initio multiphase DT equation of state.
Phys Rev Lett
; 107(11): 115004, 2011 Sep 09.
Article
em En
| MEDLINE
| ID: mdl-22026681
ABSTRACT
Improving the description of the equation of state (EOS) of deuterium-tritium (DT) has recently been shown to change significantly the gain of an inertial confinement fusion target [S. X. Hu et al., Phys. Rev. Lett. 104, 235003 (2010)]. Here we use an advanced multiphase EOS, based on ab initio calculations, to perform a full optimization of the laser pulse shape with hydrodynamic simulations starting from 19 K in DT ice. The thermonuclear gain is shown to be a robust estimate over possible uncertainties of the EOS. Two different target designs are discussed, for shock ignition and self-ignition. In the first case, the areal density and thermonuclear energy can be recovered by slightly increasing the laser energy. In the second case, a lower in-flight adiabat is needed, leading to a significant delay (3 ns) in the shock timing of the implosion.
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MEDLINE
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En
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Phys Rev Lett
Ano de publicação:
2011
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Article
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França