Details

Autor(en) / Beteiligte

• Nsengiyumva, F.
• Hellberg, M. A.
• Verheest, F.
• Mace, R. L.

Titel

Stopbands in the existence domains of acoustic solitons

Ist Teil von

• Physics of plasmas, 2014-10, Vol.21 (10)

Erscheinungsjahr

2014

Beschreibungen/Notizen

• A fully nonlinear Sagdeev pseudopotential approach is used to study the existence domain of fast mode ion-acoustic solitons in a three-species plasma composed of cold and warm adiabatic positive ion species and Boltzmann electrons. It is shown that for appropriate values of the cold-to-warm ion charge-to-mass ratio, μ, and the effective warm ion-to-electron temperature ratio, τ, there is a range in cold to warm ion charge density ratio, f, 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. The stopbands are associated with a limiting curve of the existence domain that is double-valued in speed for a range of values of f. Analytical estimates of the upper and lower limits of τ and μ that support stopbands are found. It is suggested that, inter alia, the analysis should be applicable to the solar wind plasma.