On the envelope soliton near critical density in a plasma with cold ions and two-temperature electrons |
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Authors: | S. Chakraborty G. Pakira A. Roy Chowdhury |
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Affiliation: | (1) High Energy Physics Division, Department of Physics, Jadavpur University, 700032 Calcutta, India |
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Abstract: | Summary We have analysed the formation of envelope soliton near critical density in a plasma consisting of two-temperature electrons and cold ions. The non-linear Schr?dinger-like equation obtained isiφ t +pφ xx +q|φ|4φ=0 which we call the modified non-linear Schr?dinger equation. It is also observed that this approach leads to a physical situation where a linear combination of both the modified and usual NLS equations holds, in the formiφ t +pφ xx +q 1|φ|2φ +q 2|φ|4φ=0. It is demonstrated through graphical analysis thatq 1,q 2, thought of as a function of β(=T el/T eh), behave in opposite way. That is, whenq 1 grows,q 2 decays, or vice versa. Lastly we demonstrate that this equation can sustain a type of solution other than the usual solitary profile. The form of such a wave is also depicted graphically. |
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Keywords: | Waves oscillations instabilities in plasma |
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