Details

Autor(en) / Beteiligte

• Verheest, Frank
• Cattaert, Tom
• Hellberg, Manfred A.

Titel

Ion- and dust-acoustic solitons in dusty plasmas: Existence conditions for positive and negative potential solutions

Ist Teil von

• Physics of plasmas, 2005-08, Vol.12 (8), p.082308-082308-8

Ort / Verlag

United States: American Institute of Physics

Erscheinungsjahr

2005

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The usual description of dust-modified ion-acoustic and dust-acoustic solitons in plasmas containing negative dust is in terms of Boltzmann distributions for the hotter species. In the dust-modified ion-acoustic regime, besides positive potential solitons, negative structures can also be generated, for electrons with a polytropic index γ e ≠ 1 , as well as for Boltzmann electrons, subject to conditions that are not too stringent. These general conditions were previously either ignored or given for weakly nonlinear solutions only. In the dust-acoustic domain in plasmas with negatively charged dust, however, only negative potential solitons can occur, even when the lighter species have non-Boltzmann distributions. For Boltzmann electrons only an infinite dust compression limits the soliton amplitudes and corresponding Mach numbers, whereas for γ e ≠ 1 , the electron density, too, can be a limiting factor for the existence domain of such solitons.