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Head-on collision between single-and multi-soliton heavy ion acoustic waves in multi-ion plasmas

Plasma Science and Technology 2019年第9期21卷 58-72页

作者： M S ALAM M R TALUKDER Department of Mathematics Chittagong University of Engineering and Technology Chittagong-4349 Bangladesh Plasma Science and Technology Lab Department of Electrical and Electronic Engineering University of Rajshahi Rajshahi-6205 Bangladesh

Head-on collisions among the single-and multi-soliton’s heavy ion acoustic waves(HIAWs) of multi-ion plasma are studied. The plasma consists of adiabatic positively charged inertial heavy ions, Boltzmann energy distributed light ions and kappa energy distributed electrons. The extended poincaré-Lighthill-Kuo(e PLK) method is applied for the derivation of two-sided Korteweg–de Vries(KdV) equations(KdVEs). The KdV single-soliton solutions(KdVSSs) are determined using the hyperbolic secant method and the KdV multi-soliton solutions(KdVMSs)are obtained using the Hirota method. The effects of superthermality of electrons, temperature ratios of electron to light ion and heavy ion to electron, and the density ratio of electron to heavy ion on phase shifts are investigated for the head-on collisions between two-soliton HIAWs. The effects of plasma parameters on angular frequency, phase speed, production of multi-soliton structures, and the head-on collisions among single-, double-, triple-, quadruple-, and quintuplesolitons are also studied.

关键词： HIAWs multi-soliton kappa-distribution ePLK method Hirotta's method multi-ion

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Kadomstev-Petviashvilli-Burgers (KPB) Equation in a Five Component Cometary Plasma with Kappa Described Electrons and ions

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Journal of Applied Mathematics and Physics 2015年第11期3卷 1431-1442页

作者： Manesh Michael Sreekala Gopinathan Sijo Sebastian Neethu T. Willington Anu Varghese Renuka Gangadharan Chandu Venugopal School of Pure & Applied Physics Mahatma Gandhi University Priyadarshini Hills Kottayam Kerala India Department of Physics C. M. S. College Kottayam India Kerala State Council for Science Technology & Environment Sasthra Bhavan Pattom Thiruvananthapuram India

We investigate the existence of ion-Acoustic solitary/shock waves in a five component cometary plasma consisting of positively and negatively charged oxygen ions, kappa described hydrogen ions, hot electrons and cold electrons. The KPB equation is derived for the system;its solution is plotted for different kappa values, as well as for the temperature ratios of ions. It is found that the amplitude of solitary structure increases with increasing kappa values and negatively charged oxygen ion densities. As the temperature of the positively charged oxygen ions increases, the amplitude of solitary wave also increases. We have also studied the dependence of coefficients of the KPB equation on physical parameters relevant to comet Halley.

关键词： Cometary multi-ion Plasma ion-Acoustic Solitary Wave Shock Wave KPB Equation

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