Electron acoustic waves in pure ion plasmas

Anderegg, F.; Driscoll, C. F.; Dubin, D. H. E.; O'Neil, T. M.; Valentini, F.
May 2009
Physics of Plasmas;May2009, Vol. 16 Issue 5, p055705
Academic Journal
Standing electron acoustic waves (EAWs) are observed in a pure ion plasma. EAWs are slow nonlinear plasma waves; at small amplitude their phase velocities ([formula] for small kλD) and their frequencies are in agreement with theory. At moderate amplitude, EAW-type plasma waves can be excited over a broad range of frequencies. This frequency variability comes from the plasma adjusting its velocity distribution so as to make the plasma mode resonant with the drive frequency. Wave-coherent laser-induced fluorescence shows the intimate nature of the wave-particle interaction, and how the particle distribution function is modified by the wave driver until the plasma mode is resonant with the driver.


Related Articles

  • Comment on “Graphical analysis of electron inertia induced acoustic instability” [Phys. Plasmas 12, 032105 (2005)]. Hirose, A. // Physics of Plasmas;Oct2006, Vol. 13 Issue 10, p104701 

    The ion flow driven acoustic instability reported in Phys. Plasmas 12, 032105 (2005) is a result of improper expansion of the dispersion relation and violates the basic electron adiabaticity condition |ω|

  • Resonant and nonresonant decay instability of a Langmuir wave in a plasma cylinder. Konar, Swapan; Jain, V. K. // Journal of Applied Physics;7/15/1989, Vol. 66 Issue 2, p501 

    Examines the parametric decay of a Langmuir wave into a Langmuir wave and an ion-acoustic wave in a plasma cylinder. Dispersion relation for resonant decay; Information on nonresonant decay instability.

  • Harmonic generation and departure from quasineutrality in ion sound and Langmuir wave coupling. Mounaix, Philippe; Laval, Guy; Mora, Patrick; Pesme, Denis // Physics of Fluids B: Plasma Physics;Jun91, Vol. 3 Issue 6, p1392 

    The validity conditions of the Zakharov equations are reconsidered by investigating the linear stability analysis of a dipolar Langmuir wave. It is shown that the corresponding dispersion relation has a wider range of applicability, W/NT<(kλD)-2, than the usual domain of validity of the...

  • Modulational instability of random phase plasmons in collisional plasmas. Shukla, P.K.; Stenlo, L. // Physics of Plasmas;Aug98, Vol. 5 Issue 8, p2846 

    Investigates the modulation instability of ion acoustic waves in the presence of random phase plasmons in collisional plasma. Use of the Liouville equation in Langmuir waves; Reference to the lower ionosphere and radio frequency laboratory discharges of the earth; Relevance of modulational...

  • Coupled Langmuir and ion-accoustic waves in two-electron temperature plasmas. Rao, N.N.; Shukla, P.K. // Physics of Plasmas;Mar1997, Vol. 4 Issue 3, p636 

    Shows that the nonlinear propagation of coupled Langmuir and ion-acoustic waves in a two-electron temperature plasma is governed by a generalized Schrodinger-Boussinesq system, which for uni-directional propagation reduces to the coupled Schrodinger-Korteweg-de Vries system. Derivation of...

  • Analytic treatment of electromagnetic emission near the plasma frequency via Langmuir wave decay. Edney, S. D.; Robinson, P. A. // Physics of Plasmas;Oct99, Vol. 6 Issue 10, p3799 

    Analyzes the three-wave decay of a Langmuir wave into an ion-sound wave and an electromagnetic wave close to the plasma frequency. Realistic approximations to the spectra for the Langmuir and ion-sound waves; Analytic calculation of the resulting spectrum of transverse electromagnetic waves in...

  • Dust ion-acoustic solitary waves in a dusty plasma with arbitrarily charged dust and flat-trapped electrons. Alinejad, H. // Astrophysics & Space Science;Aug2011, Vol. 334 Issue 2, p331 

    The properties of arbitrary amplitude dust ion-acoustic (DIA) solitary waves (SWs) in a dusty plasma containing warm adiabatic ions, electrons following flat-topped velocity distribution, and arbitrarily (positively or negatively) charged immobile dust is studied by the pseudo-potential...

  • An experimental study of electron distributions and wave potentials in ion-acoustic and pseudoshocks. Honzawa, Tadao // Physics of Fluids (00319171);Jun88, Vol. 31 Issue 6, p1766 

    Distribution functions of trapped and untrapped electrons in ion-acoustic shocks have been measured separately. Using these data, the trapped-to-untrapped electron density ratios are determined as a function of the shock potential. Further, shock potentials estimated from the distributions are...

  • Dust ion-acoustic shocks and holes. Shukla, P. K. // Physics of Plasmas;Mar2000, Vol. 7 Issue 3 

    Properties of dust ion-acoustic (DIA) shocks and DIA holes are examined, assuming that a dusty plasma contains immobile charged dust grains, warm electrons, and warm ions. A Kortweg-deVries- Burgers equation for DIA shocks is derived by employing the hydrodynamic equations for the warm ion fluid...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics