Effects of the ionic masses and positron density on the damped behavior in nonthermal collisional plasmas
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ORIGINAL PAPER
Effects of the ionic masses and positron density on the damped behavior in nonthermal collisional plasmas H G Abdelwahed1,2*, A M El-Hanbaly2, R Sabry1,3 and A A El-Rahman4 1
Department Of Physics, College of science and Humanities, in Al-Kharj, Prince Sattam bin Abdulaziz University, Al-Kharj 11942, Kingdom of Saudi Arabia 2
Theoretical Physics Group, Faculty of Science, Mansoura University, Mansoura, Egypt
3
Theoretical Physics Group, Department of Physics, Faculty of Science, Damietta University, New Damietta, Egypt 4
Department of Physics, Faculty of Science, The New Valley University, El-Kharja 72714, Egypt Received: 08 November 2019 / Accepted: 06 March 2020
Abstract: Wave characteristics of solitons with damped structures in a four-component plasma fluid having positive and negative ions, nonthermal distributed positrons and electrons have been studied. The damped Kadomtsev–Petviashvili (DKP) equation has been obtained in a small amplitude limit. The nonlinear criticality of DKP is examined for related Earth’s ionosphere plasma parameters. The effects of the positron density ratio, the ionic mass ratio, the electron density ratio, the index of non-thermality and frequency parameters of collisions on the formation of both damped structures of compressive and rarefactive types are studied. It is a value mention that the results performed in this work may be used in the plasma of (D–F) Earth’s ionosphere regions. Keywords: Damped structures; Nonthermal distributed positrons and electrons; Positive and negative ions PACS Nos.: 43.25.?y; 47.35.Fg; 47.40.Nm
1. Introduction Nonlinear damped evolution equations and their applications are one of the important intractable problems in fluids and plasma dynamics [1–6]. The observed damped waves in space and experimental laboratories caused significant problems in localized solitary forms [7–12]. These deformed structures in solitons were investigated in several studies via many physical concepts such as particle collisions [13–16], fluctuations in particle charge [5, 17] and fluid viscosities [18–20]. Chatterjee et al. studied the contributions of the external periodical force frequency and strength on the forced damped KdV equation describing dusty superthermal plasma. It was spotted that the external force frequency and strength were significantly effective on the structure of damped soliton waves [6]. Sahu studied the dynamics of quantum damped nonplanar nonlinear profiles
*Corresponding author, E-mail: [email protected]; [email protected]; [email protected]
in plasma with quantum collisions. It was found that the damped amplitude increases by reduction of time. Also, the quantum diffraction causes the enhancement of dissipation structures [21]. Tamang et al. [22] investigated the solution and dynamical perturbed ion wave properties in the collisional dust plasma model. It was found that the parameters of collision frequencies and loss rate become very effective in quasiperiodic applications and transition from chaotic behavior
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