On existence conditions of dust-acoustic solitary waves in a plasma with positively charged dust

Details On existence conditions of dust-acoustic solitary waves in a plasma with positively charged dust On existence conditions of dust-acoustic solitary waves in a plasma with positively charged dust

Feb 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012ap%26ss.337..605m&link_type=abstract

Astrophysics and Space Science, Volume 337, Issue 2, pp.605-611

Astronomy and Astrophysics

Astrophysics

Solitary Waves, Complex Plasma, Ionosphere

Scientific paper

Dust acoustic (DA) solitary wave existence conditions are investigated for positively charged dust particles in the presence of nonthermal electrons. Once Sagdeev pseudo-potential derived through fluid equations, for large amplitude DA waves, the lower limit on Mach number is calculated analytically using the necessary condition for the solitary waves existence. The double layers conditions provides the upper limit on Mach number. This allowed us to numerically investigate the effect of the temperature, density and nonthermal parameters on the solitary waves' characteristics. The present study is devoted to a complex plasma subject to ultraviolet radiations such as the one in the lower earth's ionosphere.

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