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Effect of positron density and temperature on the electron acoustic waves in a magnetized dissipative plasma
Author(s) -
Bansal Sona,
Aggarwal Munish,
Gill Tarsem S.
Publication year - 2019
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201900047
Subject(s) - physics , shock waves in astrophysics , shock wave , electron , plasma , dissipative system , magnetic field , shock (circulatory) , positron , dissipation , amplitude , atomic physics , acoustic wave , mechanics , nuclear physics , quantum mechanics , medicine
Zakharov–Kuznetsov–Burgers (ZKB) equation is derived for electron acoustic shock waves in magnetized e–p–i plasma. In the present model, magnetized plasma containing two electron population with kappa distributed positrons has been considered. The propagation characteristics of three dimensional electron acoustic (EA) shock waves have been studied under the influence of magnetic field. Our present plasma model supports the negative potential shocks. Combined action of dissipation ( η ), superthermality ( κ ), concentration of positrons ( β ), temperature ratio of cold electrons to positrons ( σ ), and magnetic field ( ω c ) significantly modify the properties of EA shock waves. The width and amplitude of the shock structures are modified by various physical parameters. It is found that shock wave width decreases with increase in β , η 0 , and ω c whereas it becomes wider for κ and σ . Further, potential of the shock wave decreases as one departs away from superthermal distribution.