Lawrence Livermore National Laboratory, California 94551, USA.
Phys Rev Lett. 2012 Aug 17;109(7):075002. doi: 10.1103/PhysRevLett.109.075002. Epub 2012 Aug 16.
The plasma analog of an adiabatic lapse rate (or temperature variation with height) in atmospheric physics is obtained. A new source of plasma temperature gradient in a binary ion species mixture is found that is proportional to the concentration gradient ∇α and difference in average ionization states Z(2)-Z(1). Application to inertial-confinement-fusion implosions indicates a potentially strong effect in plastic (CH) ablators that is not modeled with mainline (single-fluid) simulations. An associated plasma thermodiffusion coefficient is derived, and charge-state diffusion in a single-species plasma is also predicted.
获得了大气物理学中绝热递减率（或高度变化的温度）的等离子体模拟。在二元离子混合物种中发现了新的等离子体温度梯度源，该源与浓度梯度∇α和平均电离态 Z(2)-Z(1) 的差异成正比。在惯性约束聚变内爆中的应用表明，在塑料（CH）烧蚀剂中存在潜在的强烈影响，而主流（单一流体）模拟并未对此进行建模。推导出了相关的等离子体热扩散系数，并预测了单一流体等离子体中的电荷态扩散。
