Dust acoustic waves in complex plasmas at elevated pressure

作者：Filippov A V^*; Starostin A N; Tkachenko I M; Fortov V E

来源：Physics Letters A, 2011, 376(1): 31-38.

DOI：10.1016/j.physleta.2011.10.030

• Dust acoustic waves
• Bi-Yukawa interaction potential
• High pressure dusty plasmas
• Hyper-netted chain approximation
• Hydrodynamic approach
• Non-ideality parameter

The bi-Yukawa effective interaction potential with different screening constants is employed to calculate dust static correlation functions in the hyper-netted chain approximation and to generalize the theory of dust acoustic waves within the non-perturbative moment approach complemented by hydrodynamic considerations. For the bi-Yukawa interaction potential the sound speed becomes significantly wavenumber-dependent, an additional soft diffusion-like mode is predicted, and the static dielectric function is shown to take negative values. The results can be applied to non-equilibrium dusty plasmas at elevated pressure.

• 出版日期2011-11-28