Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623, USA.
Phys Rev Lett. 2010 Jun 11;104(23):235003. doi: 10.1103/PhysRevLett.104.235003. Epub 2010 Jun 10.
Accurate knowledge about the equation of state (EOS) of deuterium is critical to inertial confinement fusion (ICF). Low-adiabat ICF implosions routinely access strongly coupled and degenerate plasma conditions. Using the path integral Monte Carlo method, we have derived a first-principles EOS (FPEOS) table of deuterium. It is the first ab initio EOS table which completely covers typical ICF implosion trajectory in the density and temperature ranges of ρ=0.002-1596 g/cm3 and T=1.35 eV-5.5 keV. Discrepancies in internal energy and pressure have been found in strongly coupled and degenerate regimes with respect to SESAME EOS. Hydrodynamics simulations of cryogenic ICF implosions using the FPEOS table have indicated significant differences in peak density, areal density (ρR), and neutron yield relative to SESAME simulations.
关于氘的状态方程 (EOS) 的准确知识对惯性约束聚变 (ICF) 至关重要。低绝热 ICF 内爆通常会进入强耦合和简并等离子体条件。我们使用路径积分蒙特卡罗方法，推导出了氘的第一性原理状态方程 (FPEOS) 表。这是第一个完全涵盖典型 ICF 内爆轨迹的从头算状态方程表，其密度和温度范围为 ρ=0.002-1596 g/cm3，T=1.35 eV-5.5 keV。在强耦合和简并区域，与 SESAME EOS 相比，我们发现了内能和压力的差异。使用 FPEOS 表对低温 ICF 内爆的流体动力学模拟表明，与 SESAME 模拟相比，峰值密度、面密度 (ρR) 和中子产额存在显著差异。
