Download - Akademi Sains Malaysia

More documents

Recommendations

Info

40 Journal of Science and Technology in the Tropics 38. Chatterjee P., Roy K., Muniandy S.V. and Wong C.S. (2009) Dressed soliton in quantum dusty pair-ion plasma. Phys. Plasmas 16: 112106. 39. Chatterjee P., Roy K., Mondal G., Muniandy S.V., Yap S.L. and Wong C.S. (2009) Dresseed solitons in Quantum electron-positron-ion plasmas. Phys. Plasmas 16: 122112. 40. Kodoma Y. and Taniuti T. (1978) Higher Order Approximation in the Reductive Perturbation Method. I. The Weakly Dispersive System. J. Phys. Soc. Japan 45: 298-310. APPENDIX: Expressions
Journal of Science and Technology in the Tropics (2012) 8: 41-51 Journal of Science and Technology in the Tropics 41 Effects of non-thermal ions on dust-ion-acoustic shock waves in a dusty plasma with heavy negative ions in non-planar geometry A. Paul 1 , G. Mandal 1, *, A. A. Mamun 2 and M. R. Amin 1 1 Department of Electronics and Communications Engineering, East West University, 43 Mohakhali, Dhaka 1212, Bangladesh 2 Department of Physics, Jahangirnagar University, Savar, Dhaka 1342, Bangladesh (*E-mail: gdmandal@ewubd.edu) Received 20-12-2011; accepted 22-02-2012 Abstract Dust negative ion acoustic (DNIA) shock wave in a dusty multi-ion plasma consisting of electrons, light positive ions, heavy negative ions and extremely massive charge fluctuating negative dust in a non-planar geometry has been investigated by employing reductive perturbation technique. For this, a modified Burger’s equation is derived and numerically solved it to get the envelope of the DNIA shock wave. The effect of the non-thermal ions on the DNIA shock waves is included in the dusty plasma with heavy negative ions. It is shown how the basic features of the nonlinear DNIA shock waves are modified by the presence of the charge fluctuating dust and the nonlinear nature of the positively charged light ions in the non-planer geometry. It has been observed that the developed shock heights are different for different geometries, and in the case of spherical geometry the shock wave has higher height compared to that of the cylindrical geometry. The results of the present work would be useful in understanding laboratory and space dusty plasmas. Keywords dusty plasma – non-thermal ions – Burger’s equation INTRODUCTION Studies of the dust ion acoustic (DIA) waves in multi-ion dusty plasmas have received a great deal of attention in recent years [1-11]. Dusty plasma exists in astrophysical and space environments [12-15], such as cometary tails, planetary rings and interstellar medium. Shukla and Silin [16] have first theoretically reported one of these waves as low frequency dust ion-acoustic (DIA) waves. The DIA waves of Shukla and Silin [16] have also been observed in laboratory experiments [1, 17-20]. Both in theoretical and experimental point of view the linear properties of DIA waves [15, 16, 21, 22] are now well understood. Recently there has been extensive research work on nonlinear waves associated with the DIA waves [23-26]. The presence of negative ions, which are present in space and laboratory dusty plasma situations [19, 20, 27], significantly modify the charging of dust particles
Page 2 and 3: Volume 8 Number 1 June 2012 Editori
Page 4 and 5: Volume 8 Number 1 June 2012 Editori
Page 6 and 7: 6 Journal of Science and Technology
Page 8 and 9: 8 Journal of Science and Technology
Page 10 and 11: 10 Journal of Science and Technolog
Page 21 and 22: Journal of Science and Technology i
Page 27: Journal of Science and Technology i
Page 59: Journal of Science and Technology i
Page 80: 80 Journal of Science and Technolog

Download - Akademi Sains Malaysia

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?