Nonplanar dust ion-acoustic solitary and shock excitations in electronegative plasmas with trapped electrons

Details Nonplanar dust ion-acoustic solitary and shock excitations in electronegative plasmas with trapped electrons Nonplanar dust ion-acoustic solitary and shock excitations in electronegative plasmas with trapped electrons

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012ap%26ss.337..231e&link_type=abstract

Astrophysics and Space Science, Volume 337, Issue 1, pp.231-246

Astronomy and Astrophysics

Astrophysics

Plasma, Electronegative Plasma, Nonplanar Geometry, Solitary Structure, Shock Structure

Scientific paper

It is shown that the three-dimensional cylindrical Kadomtsev-Petviashvili (CKP) and the extended cylindrical Kadomtsev-Petviashvili (ECKP) equations can describe the propagation of nonplanar dust ion-acoustic excitations in a dusty plasma composed of positive ions, negative ions, stationary dust particles, as well as trapped electrons or a small percentage of trapped electrons. It is found that the solution of the CKP equation supports only solitary pulses, while the ECKP equation describes the propagation of both solitary and shock excitations. The effects of physical parameters, namely negative ions density, dust grains density, positive-to-negative mass ratio, direction cosine of the wave propagation on the pulses profile are examined. Furthermore, the existence regions of either localized or shock pulses are investigated. The relevance of nonlinear structures in the Earth's ionosphere and plasma experiment is discussed.

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