Proton stopping using a full conserving dielectric function in plasmas at any degeneracy

Journal Article · Fri Oct 15 04:00:00 EDT 2010 · Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)

DOI:https://doi.org/10.1103/PHYSREVE.82.046403· OSTI ID:21464552

Barriga-Carrasco, Manuel D ^[1]

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1. E.T.S.I. Industriales, Universidad de Castilla-La Mancha, E-13071 Ciudad Real (Spain)

In this work, we present a dielectric function including the three conservation laws (density, momentum and energy) when we take into account electron-electron collisions in a plasma at any degeneracy. This full conserving dielectric function (FCDF) reproduces the random phase approximation (RPA) and Mermin ones, which confirms this outcome. The FCDF is applied to the determination of the proton stopping power. Differences among diverse dielectric functions in the proton stopping calculation are minimal if the plasma electron collision frequency is not high enough. These discrepancies can rise up to 2% between RPA values and the FCDF ones, and to 8% between the Mermin ones and FCDF ones. The similarity between RPA and FCDF results is not surprising, as all conservation laws are also considered in RPA dielectric function. Even for plasmas with low collision frequencies, those discrepancies follow the same behavior as for plasmas with higher frequencies. Then, discrepancies do not depend on the plasma degeneracy but essentially do on the value of the plasma collision frequency.

• OSTI ID: 21464552
• Journal Information: Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print), Journal Name: Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print) Journal Issue: 4 Vol. 82; ISSN 1539-3755
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
APPROXIMATIONS
BARYONS
CALCULATION METHODS
COLLISIONS
CONSERVATION LAWS
DIELECTRIC PROPERTIES
ELECTRICAL PROPERTIES
ELECTRON COLLISIONS
ELECTRON-ELECTRON COLLISIONS
ELEMENTARY PARTICLES
FERMIONS
HADRONS
NUCLEONS
PERMITTIVITY
PHYSICAL PROPERTIES
PLASMA
PLASMA DENSITY
PROTONS
RANDOM PHASE APPROXIMATION
STOPPING POWER