2005/05/02 by Hossein Abbasi, H. Abbasi, Abbasi, H. +4
Earth and Planetary Sciences · Engineering · Physics and Astronomy · #Aerodynamics and Acoustics in Jet Flows #FOS: Physical sciences #Plasma Physics (physics.plasm-ph) #Plasma and Flow Control in Aerodynamics #Seismic Waves and Analysis #physics.plasm-ph
paper · pdf · doi:10.48550/arxiv.physics/0505011
arxiv created 2005/05/02 · openalex publication_date 2005/05/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper, the nonlinear theory of plasma waves is extended to the plasmas that their equilibrium state are specified by the non-Maxwellian (here kappa) distribution. We believe that the extension is very important since most of the space and some of laboratory plasmas are not in the Maxwellian equilibrium. Although the linear theory of this issue has been known for the decades but, to our knowledge, this is the first attempt in opening the gate to the nonlinear world of plasma waves with the non-Maxwellian equilibrium. As an example the ion-acoustic solitons are studied in this framework taking into account the electron trapping in the trough of longitudinal field. It is shown, as the most important result regarding to the non-Maxwillian equilibrium, that there is the possibility for the ion-acoustic solitons to move subsonically. The solitons velocity and their width are monotonically increasing functions of spectral index (κ) and approach to the their Maxwellian values as κ→ ∞.