Open AccessExtent of validity of the hydrodynamic description of ions in dense plasmas
Author(s) -
J. Mithen,
Jérôme Daligault,
G. Gregori
Publication year - 2011
Publication title -
physical review. e, statistical, nonlinear and soft matter physics
Language(s) - English
Resource type - Journals
eISSN - 1550-2376
pISSN - 1539-3755
DOI - 10.1103/physreve.83.015401
Subject(s) - yukawa potential , lambda , physics , plasma , coupling (piping) , range (aeronautics) , ion , scattering , domain (mathematical analysis) , statistical physics , quantum mechanics , mathematical analysis , materials science , mathematics , metallurgy , composite material
We show that the hydrodynamic description can be applied to modeling the ionic response in dense plasmas for a wide range of length scales that are experimentally accessible. Using numerical simulations for the Yukawa model, we find that the maximum wave number kmax at which the hydrodynamic description applies is independent of the coupling strength, given by k maxλs 0.43, where λs is the ionic screening length. Our results show that the hydrodynamic description can be used for interpreting x-ray scattering data from fourth generation light sources and high power lasers. In addition, our investigation sheds new light on how the domain of validity of the hydrodynamic description depends on both the microscopic properties and the thermodynamic state of fluids in general. © 2011 American Physical Society