Abstract
| Language | English |
|---|---|
| Number of pages | 18 |
| Journal | Physics Letters A |
| Early online date | 27 May 2016 |
| DOIs | |
| Publication status | E-pub ahead of print - 27 May 2016 |
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Keywords
- quantum plasma
- screening
- Fermi-Dirac distribution
Cite this
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Finite temperature static charge screening in quantum plasmas. / Eliasson, Bengt; Akbari-Moghanjoughi, Massoud.
In: Physics Letters A, 27.05.2016.Research output: Contribution to journal › Article
TY - JOUR
T1 - Finite temperature static charge screening in quantum plasmas
AU - Eliasson, Bengt
AU - Akbari-Moghanjoughi, Massoud
PY - 2016/5/27
Y1 - 2016/5/27
N2 - The shielding potential around a test charge is calculated, using the linearized quantum hydrodynamic formulation with the statistical pressure and Bohm potential derived from finite temperature kinetic theory, and the temperature effects on the force between ions is assessed. The derived screening potential covers the full range of electron degeneracy in the equation of state of the plasma electrons. An attractive force between shielded ions in an arbitrary degenerate plasma exists below a critical temperature and density. The effect of the temperature on the screening potential profile qualitatively describes the ion-ion bound interaction strength and length variations. This may be used to investigate physical properties of plasmas and in molecular-dynamics simulations of fermion plasma. It is further shown that the Bohm potential including the kinetic corrections has a profound effect on the Thomson scattering cross section in quantum plasmas with arbitrary degeneracy.
AB - The shielding potential around a test charge is calculated, using the linearized quantum hydrodynamic formulation with the statistical pressure and Bohm potential derived from finite temperature kinetic theory, and the temperature effects on the force between ions is assessed. The derived screening potential covers the full range of electron degeneracy in the equation of state of the plasma electrons. An attractive force between shielded ions in an arbitrary degenerate plasma exists below a critical temperature and density. The effect of the temperature on the screening potential profile qualitatively describes the ion-ion bound interaction strength and length variations. This may be used to investigate physical properties of plasmas and in molecular-dynamics simulations of fermion plasma. It is further shown that the Bohm potential including the kinetic corrections has a profound effect on the Thomson scattering cross section in quantum plasmas with arbitrary degeneracy.
KW - quantum plasma
KW - screening
KW - Fermi-Dirac distribution
U2 - 10.1016/j.physleta.2016.05.043
DO - 10.1016/j.physleta.2016.05.043
M3 - Article
JO - Physics Letters A
T2 - Physics Letters A
JF - Physics Letters A
SN - 0375-9601
ER -