The propagation of arbitrary amplitude ion-acoustic (IA) solitary waves (SWs) is studied in unmagnetized, collisionless, homogeneous electron-positron-ion (e-p-i) plasmas with finite temperature degeneracy both electrons and positrons. Starting from a set fluid equations for classical ions Fermi-Dirac distribution degenerate positrons, linear dispersion relation IA derived. It seen that the wav...

A variety of kinetic waves develop in the solar wind. The relationship between these and larger-scale structures, such as current sheets ongoing turbulence remain a topic investigation. Similarly, instabilities producing ion-acoustic wind remains an open question. goals this paper are to investigate electrostatic Langmuir at 0.5 AU determine whether associated streaming can produce observed wav...

Electron acoustic waves (EAW) with a phase velocity less than twice the plasma thermal velocity are observed on pure ion plasma columns. At low excitation amplitudes, the EAW frequencies agree with theory, but at moderate excitation the EAW is more frequency variable than typical Langmuir waves, and at large excitations resonance is observed over a broad range. Laser induced fluorescence measur...

We investigate, using a multi-fluid approach, the main properties of standing ion-acoustic modes driven by nonlinear Alfv\'en waves. The character Alfv\'enic pump is because we study superposition two identical circularly polarised counter-propagating consider parallel propagation along constant magnetic field and find that left right-handed generate via ponderomotive forces second harmonic dem...

Ion acoustic wave phenomena are studied and compared in two low-pressure argon discharges created by helicon sources. The wave amplitudes are spatially localized near the edge of a plasma column as the amplitudes of the “mirror waves” that are separated from the helicon source frequency by the ion wave frequency. Dependencies of the ion wave on radial position, pressure, input power, and magnet...