Colloidal Plasmas : Effect of nonthermal ion distribution and dust temperature on nonlinear dust acoustic solitary waves

Pramana

Harvinder Kaur¹  Tarsem Singh Gill1¹ 

[1] Department of Physics, Guru Nanak Dev University, Amritsar 143 005, India$$

关键词: Solitons;    dust acoustic wave;    Sagdeev potential;    dusty plasma;    nonthermal ion.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

The effects of nonthermal ion distribution and finite dust temperature are incorporated in the investigation of nonlinear dust acoustic waves in an unmagnetized dusty plasma. Sagdeev pseudopotential method which takes into account the full nonlinearity of plasma equations, is used here to study solitary wave solutions. Possibility of co-existence of refractive and compressive solitons as a function of Mach number, dust temperature and concentration of nonthermal ions, is considered. For the fixed value of nonthermal ions, it is found that the effect of increase in dust temperature is to reduce the range of co-existence of compressive and refractive solitons. Particular concentration of nonthermal ions results in disappearance of refractive solitons while the decrease in dust temperature, at this concentration restores the lost refractive solitons.

【 授权许可】

Unknown