Dust ion acoustic solitons in a plasma with kappa-distributed electrons

作者：Baluku T K^*; Hellberg M A; Kourakis I; Saini N S

来源：Physics of Plasmas, 2010, 17(5): 053702.

DOI：10.1063/1.3400229

• dusty plasmas
• plasma ion acoustic waves
• plasma solitons

Dust ion acoustic solitons in an unmagnetized dusty plasma comprising cold dust particles, adiabatic fluid ions, and electrons satisfying a kappa distribution are investigated using both small amplitude and arbitrary amplitude techniques. Their existence domain is discussed in the parameter space of Mach number M and electron density fraction f over a wide range of values of kappa. For all kappa > 3/2, including the Maxwellian distribution, negative dust supports solitons of both polarities over a range in f. In that region of parameter space solitary structures of finite amplitude can be obtained even at the lowest Mach number, the acoustic speed, for all kappa. These cannot be found from small amplitude theories. This surprising behavior

• 出版日期2010-5