Molecular dynamic study of pressure fluctuations spectrum in plasma

30th International Conference on Interaction of Intense Energy Fluxes with Matter

Bystryi, R.G.^1,2

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13, Moscow

125412, Russia^1

National Research University Higher School of Economics, Bolshoy Tryokhsvyatitelsky Pereulok 3, Moscow

123022, Russia^2

关键词: Classical molecular dynamics;    Coupled systems;    Flicker noise;    Nonideal plasma;    Pressure equilibriums;    Pressure fluctuation;    Virial theorems;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/653/1/012154/pdf
DOI  :  10.1088/1742-6596/653/1/012154

来源: IOP

【 摘 要 】

Pressure of plasma is calculated by using classical molecular dynamics method. The formula based on virial theorem was used. Spectrum pressure's fluctuations of singly ionized non-ideal plasma are studied. 1/f-like spectrum behavior is observed. In other words, flicker noise is observed in fluctuations of pressure equilibrium non-ideal plasma. Relations between the obtained result and pressure fluctuations within the Gibbs and Einstein approaches are discussed. Special attention is paid to features of calculating the pressure in strongly coupled systems.