Electron acoustic waves in a magnetized plasma with kappa distributed ions

Physics of Plasmas - Tập 19 Số 8 - 2012
S. Devanandhan1, S. V. Singh1,2, G. S. Lakhina1, R. Bharuthram3
1Indian Institute of Geomagnetism 1 , Navi Mumbai, India
2University of Kwazulu-Natal 2 School of Physics, , Durban, South Africa
3University of the Western Cape 3 , Bellville, South Africa

Tóm tắt

Electron acoustic solitary waves in a two component magnetized plasma consisting of fluid cold electrons and hot superthermal ions are considered. The linear dispersion relation for electron acoustic waves is derived. In the nonlinear regime, the energy integral is obtained by a Sagdeev pseudopotential analysis, which predicts negative solitary potential structures. The effects of superthermality, obliquity, temperature, and Mach number on solitary structures are studied in detail. The results show that the superthermal index κ and electron to ion temperature ratio σ alters the regime where solitary waves can exist. It is found that an increase in magnetic field value results in an enhancement of soliton electric field amplitude and a reduction in soliton width and pulse duration.

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Physics of Plasmas

Tập 19 Số 8

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