Existence domains of arbitrary amplitude nonlinear structures in two-electron temperature space plasmas. II. High-frequency electron-acoustic solitons

Journal Article · Sat Dec 15 04:00:00 EST 2012 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4769174· OSTI ID:22072617

Maharaj, S K ^[1]; Bharuthram, R ^[2]; Singh, S V ^[3]; Lakhina, G S ^[3]

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1. South African National Space Agency (SANSA) Space Science, P.O. Box 32, Hermanus 7200 (South Africa)
2. University of the Western Cape, Modderdam Road, Bellville 7530 (South Africa)
3. Indian Institute of Geomagnetism, New Panvel (West), Navi Mumbai 410218 (India)

A three-component plasma model composed of ions, cool electrons, and hot electrons is adopted to investigate the existence of large amplitude electron-acoustic solitons not only for the model for which inertia and pressure are retained for all plasma species which are assumed to be adiabatic but also neglecting inertial effects of the hot electrons. Using the Sagdeev potential formalism, the Mach number ranges supporting the existence of large amplitude electron-acoustic solitons are presented. The limitations on the attainable amplitudes of electron-acoustic solitons having negative potentials are attributed to a number of different physical reasons, such as the number density of either the cool electrons or hot electrons ceases to be real valued beyond the upper Mach number limit, or, alternatively, a negative potential double layer occurs. Electron-acoustic solitons having positive potentials are found to be supported only if inertial effects of the hot electrons are retained and these are found to be limited only by positive potential double layers.

• OSTI ID: 22072617
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 12 Vol. 19; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRON DENSITY
ELECTRON PLASMA WAVES
ELECTRON TEMPERATURE
ELECTRONS
IONS
MACH NUMBER
NONLINEAR PROBLEMS
PLASMA
PLASMA SIMULATION
SOLITONS