Fluid modeling of the electron flow driven ion acoustic mode in a collisional plasma with magnetized electrons

J. Vranjes, Masayoshi Tanaka, S. Poedts

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    A fluid analysis is presented of the ion sound mode in a weakly ionized collisional plasma. The ion-neutral collision frequency exceeds the ion gyrofrequency while the electrons remain magnetized. Under these conditions, an ion sound wave can propagate at arbitrary angles with respect to the direction of the magnetic field. In the presence of an electron flow along the magnetic lines the sound mode can grow. Due to the electron collisions the mode is unstable while ion collisions cause an angle dependent instability threshold which is such that the mode is most easily excited at very large angles. Hot ion effects are included in the study by means of an effective viscosity which effectively describes the ion Landau damping effect. In the presence of an additional light ion specie, the mode frequency and increment in a certain parameter range are increased.

    Original languageEnglish
    Article number122103
    JournalPhysics of Plasmas
    Volume13
    Issue number12
    DOIs
    Publication statusPublished - Dec 1 2006

    Fingerprint

    collisional plasmas
    acoustics
    fluids
    ions
    electrons
    gyrofrequency
    collisions
    Landau damping
    light ions
    sound waves
    electron scattering
    viscosity
    thresholds
    causes
    magnetic fields

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics

    Cite this

    Fluid modeling of the electron flow driven ion acoustic mode in a collisional plasma with magnetized electrons. / Vranjes, J.; Tanaka, Masayoshi; Poedts, S.

    In: Physics of Plasmas, Vol. 13, No. 12, 122103, 01.12.2006.

    Research output: Contribution to journalArticle

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