SAIP2014

On the presence of stopbands in acoustic soliton existence domains

8 Jul 2014, 17:10

1h 50m

D Ring ground level

Board: D2.78

Poster Presentation Track D2 - Space Science Poster1

Speaker

Prof. Manfred Hellberg (University of KwaZulu-Natal)

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.

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

No

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

No

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD)?

NA

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

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