Arbitrary amplitude slow electron-acoustic solitons in three-electron temperature space plasmas

Journal Article · Mon Jun 15 04:00:00 EDT 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4922683· OSTI ID:22490931

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

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1. South African National Space Agency (SANSA) Space Science, P.O. Box 32, Hermanus 7200, Republic of South Africa (South Africa)
2. University of the Western Cape, Robert Sobukwe Road, Bellville 7535, Republic of South Africa (South Africa)
3. Indian Institute of Geomagnetism, New Panvel (West), Navi Mumbai 410218 (India)

We examine the characteristics of large amplitude slow electron-acoustic solitons supported in a four-component unmagnetised plasma composed of cool, warm, hot electrons, and cool ions. The inertia and pressure for all the species in this plasma system are retained by assuming that they are adiabatic fluids. Our findings reveal that both positive and negative potential slow electron-acoustic solitons are supported in the four-component plasma system. The polarity switch of the slow electron-acoustic solitons is determined by the number densities of the cool and warm electrons. Negative potential solitons, which are limited by the cool and warm electron number densities becoming unreal and the occurrence of negative potential double layers, are found for low values of the cool electron density, while the positive potential solitons occurring for large values of the cool electron density are only limited by positive potential double layers. Both the lower and upper Mach numbers for the slow electron-acoustic solitons are computed and discussed.

• OSTI ID: 22490931
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 6 Vol. 22; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLITUDES
ELECTRON DENSITY
ELECTRON PLASMA WAVES
ELECTRON TEMPERATURE
ELECTRONS
IONS
MOMENT OF INERTIA
PLASMA
SOLITONS