HR: 0800h
AN: SM51B-0361    [Abstracts]
TI: Dependence of Frequency of Nonlinear Cold Plasma Cylindrical Oscillations on Electron Density: Significance to Space-Plasma Diagnostics
AU: * Osherovich, V A
EM: vladimir@urap.gsfc.nasa.gov
AF: L3, Goddard Space Flight Center, Greenbelt, MD 20771 United States
AU: Fainberg, J
EM: joseph.fainberg@nasa.gov
AF: NASA, Goddard Space Flight Center, Greenbelt, MD 20771 United States
AB: In a cold plasma, the frequency of small-amplitude oscillations fpe along one Cartesian coordinate is proportional to the square root of the electron density. We found that for cold-plasma nonlinear cylindrical oscillations this dependence is logarithmic with an excess of negative charge near the axis of symmetry. The electron plasma frequency increases monotonically with increasing electron density with an upper limit equal to the square root of 2 times fpe [Osherovich and Fainberg, 2004; Osherovich et al., 2004]. These results are of importance for the diagnostics of large-amplitude plasma waves in the solar wind and in the magnetosphere. Osherovich, V. A., and J. Fainberg, Phys. Plasmas, 11, 2314, 2004. Osherovich, V. A., J. Fainberg, and C. J. Farrugia, Phys. Rev. Lett., submitted, 2004.
DE: 2471 Plasma waves and instabilities
DE: 2772 Plasma waves and instabilities
DE: 0619 Electromagnetic theory
DE: 0639 Nonlinear electromagnetics
DE: 0654 Plasmas
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting