Change in Inertial Confinement Fusion Implosions upon Using an Ab Initio Multiphase DT Equation of State
Abstract
Improving the description of the equation of state (EOS) of deuteriumtritium (DT) has recently been shown to change significantly the gain of an inertial confinement fusion target [S. X. Hu , Phys. Rev. Lett. 104, 235003 (2010)PRLTAO0031900710.1103/PhysRevLett.104.235003]. 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 selfignition. 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 inflight adiabat is needed, leading to a significant delay (3 ns) in the shock timing of the implosion.
 Publication:

Physical Review Letters
 Pub Date:
 September 2011
 DOI:
 10.1103/PhysRevLett.107.115004
 arXiv:
 arXiv:1105.5495
 Bibcode:
 2011PhRvL.107k5004C
 Keywords:

 52.25.Kn;
 52.57.z;
 52.65.Pp;
 62.50.p;
 Thermodynamics of plasmas;
 Laser inertial confinement;
 Monte Carlo methods;
 Highpressure effects in solids and liquids;
 Physics  Plasma Physics
 EPrint:
 4 pages, 8 figures