Ion sphere model for Yukawa systems (dusty plasmas)

Journal Article · Mon Dec 15 00:00:00 EST 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4904309· OSTI ID:22407963

Khrapak, S. A. ^[1]; Khrapak, A. G. ^[2]; Ivlev, A. V. ^[3]; Thomas, H. M. ^[1]

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1. Forschungsgruppe Komplexe Plasmen, Deutsches Zentrum für Luft- und Raumfahrt, Oberpfaffenhofen (Germany)
2. Joint Institute for High Temperatures RAS, Moscow (Russian Federation)
3. Max-Planck-Institut für extraterrestrische Physik, Garching (Germany)

Application of the ion sphere model (ISM), well known in the context of the one-component-plasma, to estimate thermodynamic properties of model Yukawa systems is discussed. It is shown that the ISM approximation provides fairly good estimate of the internal energy of the strongly coupled Yukawa systems, in both fluid and solid phases. Simple expressions for the excess pressure and isothermal compressibility are derived, which can be particularly useful in connection to wave phenomena in strongly coupled dusty plasmas. It is also shown that in the regime of strong screening a simple consideration of neighboring particles interactions can be sufficient to obtain quite accurate estimates of thermodynamic properties of Yukawa systems.

• OSTI ID: 22407963
• Journal Information: Physics of Plasmas, Vol. 21, Issue 12; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
APPROXIMATIONS
COMPRESSIBILITY
FLUIDS
IONS
PARTICLE INTERACTIONS
PLASMA
SOLIDS
SPHERES
THERMODYNAMIC PROPERTIES
YUKAWA POTENTIAL