Head-on collision of ion-acoustic solitary waves
in an unmagnetized electron-positron-ion plasma |
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Authors: | J N Han S C Li X X Yang W S Duan |
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Institution: | (1) College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou, 730070, P.R. China |
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Abstract: | The head-on collision between two ion-acoustic solitary waves in an
unmagnetized electron-positron-ion plasma has been investigated. By
using the extended Poincaré-Lighthill-Kuo perturbation method,
we obtain the KdV equation and the analytical phase
shift after the head-on collision of two
solitary waves in this three-component plasma. The effects of the
ratio of electron temperature to positron temperature, and the ratio
of the number density of positrons to that of electrons on the phase
shift are studied. It is found that these parameters can
significantly influence the phase shifts of the solitons. Moreover,
the compressive solitary wave can propagate in this system. |
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Keywords: | 52 27 -h Basic studies of specific kinds of plasmas 52 35 -g Waves oscillations and instabilities in plasmas and intense beams |
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