Effects of positron concentration, ion temperature, and plasma {beta} value on linear and nonlinear two-dimensional magnetosonic waves in electron-positron-ion plasmas

Journal Article · Sat Jan 01 04:00:00 EST 2005 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.1814115· OSTI ID:20657945

Mushtaq, A; Shah, H A ^[1]

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1. Physics Department, Government College University Lahore, P.O. Box 54000, Lahore (Pakistan)

Magnetosonic waves are intensively studied due to their importance in space plasmas and also in fusion plasmas where they are used in particle acceleration and heating experiments. This work considers magnetosonic waves propagating obliquely at an angle {theta} to an external magnetic field in an electron-positron-ion plasma, using the effective one-fluid magnetohydrodynamic model. Two separate modes (fast and slow) for the waves are discussed in the linear approximation, and the Kadomstev-Petviashvilli soliton equation is derived by using reductive perturbation scheme for these modes in the nonlinear regime. It is observed that for both the modes the angle {theta}, positron concentration, ion temperature, and plasma {beta}-value affect the propagation properties of solitary waves and behave differently from the simple electron-ion plasmas. Likewise, current density, electric field, and magnetic field for these waves are investigated, for their dependence on the above mentioned parameters.

• OSTI ID: 20657945
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 1 Vol. 12; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BETA RATIO
ION TEMPERATURE
MAGNETOACOUSTIC WAVES
NONLINEAR PROBLEMS
PLASMA
PLASMA DENSITY
POSITRONS
SOLITONS
TWO-DIMENSIONAL CALCULATIONS