Propagation and oblique collision of electrostatic solitary waves in quantum pair-plasmas

Akbari-Moghanjoughi, M.
August 2010
Physics of Plasmas;Aug2010, Vol. 17 Issue 8, p082317
Academic Journal
Oblique interaction of small but finite-amplitude Korteweg de-Vries-type electrostatic solitary structures is investigated in an unmagnetized three-component pair-plasma in the framework of quantum hydrodynamics model using the extended Poincaré–Lighthill–Kuo perturbation method and collision phase-shift was evaluated for different plasma parameters, such as fractional concentration of plasma constituents, quantum diffraction parameter, and collision angle. Based on numerical analysis, it is found that small changes in these parameters significantly affects the collision phase-shifts of interacting solitons. It is also observed that for a given fractional pair-density, a critical value for quantum diffraction parameter separates regions in which propagations of only compression or rarefaction solitary excitations exist. Numerical analysis also reveals that the collision phase-shifts in trajectories of solitons change the sign depending on the critical plasma values Hcr and θcr.


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