Dust ion acoustic solitary structures in the presence of isothermal positrons

Journal Article · Wed Feb 15 04:00:00 EST 2017 · Plasma Physics Reports

DOI:https://doi.org/10.1134/S1063780X1702012X· OSTI ID:22614039

Paul, A. ^[1]; Das, A. ^[2]

---

1. Jadavpur University, Department of Mathematics (India)
2. B. N. S. U. P. School (India)

The Sagdeev potential technique has been employed to study the dust ion acoustic solitary waves and double layers in an unmagnetized collisionless dusty plasma consisting of negatively charged static dust grains, adiabatic warm ions, isothermally distributed electrons, and positrons. A computational scheme has been developed to draw the qualitatively different compositional parameter spaces or existence domains showing the nature of existence of different solitary structures with respect to any parameter of the present plasma system. The present system supports both positive and negative potential double layers. The negative potential double layer always restricts the occurrence of negative potential solitary waves, i.e., any sequence of negative potential solitary waves having monotonically increasing amplitude converges to a negative potential double layer. However, there exists a parameter regime for which the positive potential double layer is unable to restrict the occurrence of positive potential solitary waves. As a result, in this region of the parameter space, there exist solitary waves after the formation of positive potential double layer, i.e., positive potential supersolitons have been observed.

• OSTI ID: 22614039
• Journal Information: Plasma Physics Reports, Journal Name: Plasma Physics Reports Journal Issue: 2 Vol. 43; ISSN PPHREM; ISSN 1063-780X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLITUDES
ELECTRONS
ION ACOUSTIC WAVES
IONS
PLASMA
POSITRONS