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Title: Effect of anisotropic dust pressure and superthermal electrons on propagation and stability of dust acoustic solitary waves

Employing the reductive perturbation technique, Zakharov–Kuznetzov (ZK) equation is derived for dust acoustic (DA) solitary waves in a magnetized plasma which consists the effects of dust anisotropic pressure, arbitrary charged dust particles, Boltzmann distributed ions, and Kappa distributed superthermal electrons. The ZK solitary wave solution is obtained. Using the small-k expansion method, the stability analysis for DA solitary waves is also discussed. The effects of the dust pressure anisotropy and the electron superthermality on the basic characteristics of DA waves as well as on the three-dimensional instability criterion are highlighted. It is found that the DA solitary wave is rarefactive (compressive) for negative (positive) dust. In addition, the growth rate of instability increases rapidly as the superthermal spectral index of electrons increases with either positive or negative dust grains. A brief discussion for possible applications is included.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Department of Physics, COMSATS Institute of Information Technology Lahore, P.O. 54000, Lahore (Pakistan)
  2. Centre for Plasma Physics, Department of Physics and Astronomy, Queen's University Belfast, Belfast BT7 1NN, Northern Ireland (United Kingdom)
  3. (Egypt)
  4. Department of Physics, Faculty of Science, Damietta University, P.O. 34517, New Damietta (Egypt)
Publication Date:
OSTI Identifier:
22490925
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANISOTROPY; DUSTS; ELECTRONS; EQUATIONS; INSTABILITY; MATHEMATICAL SOLUTIONS; PARTICLES; PERTURBATION THEORY; PLASMA; STABILITY; THREE-DIMENSIONAL CALCULATIONS; WAVE EQUATIONS