Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
Phys Rev E. 2019 Jul;100(1-1):013202. doi: 10.1103/PhysRevE.100.013202.
This paper describes a computational model that self-consistently combines physics of kinetic electrons and atomic processes in a single framework. The formulation consists of a kinetic Vlasov-Boltzmann-Fokker-Planck equation for free electrons and a non-Maxwellian collisional-radiative model for atomic state populations. We utilize this model to examine the influence of atomic kinetics on inverse bremsstrahlung (IB) heating and nonlocal thermal transport. We show that atomic kinetics affects nonlinear IB absorption rates by further modifying the electron distribution in addition to laser heating. We also show that accurate modeling of nonlocal heat flow requires a self-consistent treatment of atomic kinetics, because the effective thermal conductivity strongly depends on the ionization balance of the plasma.
本文描述了一个计算模型，该模型将动力学电子的物理特性和单个框架中的原子过程自洽地结合在一起。该表述由自由电子的动力学 Vlasov-Boltzmann-Fokker-Planck 方程和原子态密度的非麦克斯韦碰撞-辐射模型组成。我们利用该模型研究了原子动力学对逆轫致辐射（IB）加热和非局域热输运的影响。我们表明，原子动力学通过进一步改变电子分布来影响非线性 IB 吸收率，除了激光加热之外。我们还表明，非局域热流的准确建模需要对原子动力学进行自洽处理，因为有效热导率强烈依赖于等离子体的电离平衡。
