Indian Journal of Physics

, Volume 93, Issue 2, pp 257–265 | Cite as

Dust ion acoustic double layer in the presence of superthermal electrons

  • Dharitree DuttaEmail author
  • K. S. Goswami
Original Paper


The existence of a dust ion acoustic double layer in a collisionless, un-magnetized, multi-component plasma is reported here. The plasma model consists of ions, negatively charged dust particles and two components of superthermal electrons. By following Sagdeev potential and reductive perturbation method, the electrostatic double layer of negative polarity is shown to exist in small-amplitude regime. From the analytical study, it is observed that the amplitude of the double layer depends upon various parameters of the superthermal electrons as well as on the dust concentration. The model considered here has a good match with the data obtained from Cassini spacecraft for outer magnetosphere of Saturn (~ 14 Rs, Rs being the radius of Saturn). So, the results obtained from this study are useful for understanding the nature of the plasma waves in Saturn magnetosphere .


Dust ion acoustic wave Multi-component plasma Superthermal electron 


52.27.Lw 52.27Cm 52.35.-g 


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Copyright information

© Indian Association for the Cultivation of Science 2018

Authors and Affiliations

  1. 1.Physics DepartmentGauhati UniversityGuwahatiIndia
  2. 2.Centre of Plasma Physics- Institute for Plasma ResearchSonapur, Kamrup (M)India

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