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Title: Self-similar expansion of a warm dense plasma

The properties of an expanding plasma composed of degenerate electron fluid and non-degenerate ions are studied. For our purposes, we use fluid equations for ions together with the electron momentum equation that include quantum forces (e.g., the quantum statistical pressure, forces due to the electron-exchange and electron correlations effects) and the quasi-neutrality condition. The governing equation is written in a tractable form by using a self-similar transformation. Numerical results for typical beryllium plasma parameters revealed that, during the expansion, the ion acoustic speed decreases for both isothermal and adiabatic ion pressure. When compared with classical hydrodynamic plasma expansion model, the electrons and ions are found to initially escape faster in vacuum creating thus an intense electric field that accelerates most of the particles into the vacuum ahead of the plasma expansion. The relevancy of the present model to beryllium plasma produced by a femto-second laser is highlighted.
Authors:
 [1] ;  [2]
  1. USTHB, Faculty of Physics, Theoretical Physics Laboratory, B.P. 32 Bab-Ezzouar, 16079 Algiers (Algeria)
  2. Department of Physics, Faculty of Science, Port Said University, Port Said (Egypt)
Publication Date:
OSTI Identifier:
22227955
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 7; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BERYLLIUM; COMPARATIVE EVALUATIONS; ELECTRIC FIELDS; ELECTRON CORRELATION; ELECTRON EXCHANGE; ELECTRONS; FRACTALS; IONS; LASER-PRODUCED PLASMA; LASERS; NUMERICAL ANALYSIS; PLASMA EXPANSION; PLASMA FLUID EQUATIONS; PLASMA PRODUCTION; PLASMA SIMULATION