Ion-acoustic waves with non-planar wavefronts

被引:0
|
作者
Shujaht BUKHARI [1 ]
Muhammad SHAHID [2 ]
Ata-ur RAHMAN [3 ]
机构
[1] Department of Physics, The University of Azad Jummu and Kashmir
[2] Department of Physics, Women University of Azad Jammu & Kashmir
[3] Department of Physics, Islamia College Peshawer
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中图分类号
O53 [等离子体物理学];
学科分类号
070204 ;
摘要
The ion-acoustic(IA) mode exhibiting various orbital angular momentum(OAM) states is examined in a plasma with drifting electrons.The constituent plasma species are modeled with a non-gyrotropic Maxwellian distribution and discussion of dispersion relation and growth rate of twisted IA waves under various conditions is presented.In the domain of kinetic model,the twisted IA waves are characterized by Laguerre-Gaussian(LG) solutions,where plasma distribution function and electric field are decomposed into axial and azimuthal components.The plasma response function is obtained under paraxial approximations and investigated for threshold condition of instability growth rate with helical electric field structures.The impact of an extra electron specie on the instability is demonstrated through a comparison of twisted waves for single and double electron species.
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页码:6 / 13
页数:8
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