Quantum ion-acoustic double layers in unmagnetized dense electron-positron-ion plasmas

Journal Article · Wed Apr 15 04:00:00 EDT 2009 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3114941· OSTI ID:21277052

Khan, S A ^[1]; Mahmood, S ^[2]; Ali, S ^[3]

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1. Department of Physics, COMSATS Institute of Information Technology (CIIT), Islamabad 44000 (Pakistan)
2. Theoretical Plasma Physics Division, PINSTECH, P. O. Nilore, Islamabad (Pakistan)
3. National Centre for Physics, Quaid-i-Azam University Campus, Islamabad 45320 (Pakistan)

The existence of small amplitude quantum ion-acoustic double layers is studied in an unmagnetized dense electron-positron-ion plasma. For this purpose, the quantum hydrodynamic model is employed to derive a deformed Korteweg-de Vries (dKdV) equation. The steady state double layer solution of dKdV equation is obtained and its dependence on various parameters is discussed. It is found that only compressive double layers can exist in such plasmas. The analytical and numerical studies reveal that the quantum ion-acoustic double layer structures strongly depend on quantum diffraction effects and positron number density.

• OSTI ID: 21277052
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 4 Vol. 16; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRONS
ION ACOUSTIC WAVES
IONS
KORTEWEG-DE VRIES EQUATION
PLASMA SHEATH
POSITRONS
QUANTUM FLUIDS
STEADY-STATE CONDITIONS