7-11 July 2014
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=16&confId=34"><font color=#0000ff>SAIP2014 Proceedings published on 17 April 2015</font></a>

On the presence of stopbands in acoustic soliton existence domains

8 Jul 2014, 17:10
1h 50m
D Ring ground level

D Ring ground level

Board: D2.78
Poster Presentation Track D2 - Space Science Poster1


Prof. Manfred Hellberg (University of KwaZulu-Natal)

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Abstract content <br> &nbsp; (Max 300 words)<br><a href="http://events.saip.org.za/getFile.py/access?resId=0&materialId=0&confId=34" target="_blank">Formatting &<br>Special chars</a>

A fully nonlinear Sagdeev pseudopotential approach is used to study the existence domain of fast ion-acoustic solitons
in a plasma composed of cold and warm adiabatic positive ion species and Boltzmann electrons. It is shown that, perhaps surprisingly, for appropriate values of the ion mass ratio and the electron-warm ion temperature ratio, there is a range in cold-to-warm ion density ratio over which a stopband in soliton speed exists. Solitons do not propagate in the stopband, although they can occur for both higher and lower speeds.

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Main supervisor (name and email)<br>and his / her institution

Prof Manfred Hellberg, University of KwaZulu-Natal, email address: hellberg@ukzn.ac.za

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Primary author

Dr Francois Nsengiyumva (University of KwaZulu-Natal)


Prof. Frank Verheest (Universiteit Gent, Belgium) Prof. Manfred Hellberg (University of KwaZulu-Natal) Prof. Richard Mace (University of KwaZulu-Natal)

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