Hybrid simulations of collapse of Alfvénic wave packets

B. Buti, M. Velli, P. C. Liewer, B. E. Goldstein, Tohru Hada

    Research output: Contribution to journalArticle

    14 Citations (Scopus)

    Abstract

    Nonlinear dynamics, of large-amplitude circularly polarized Alfvénic wave packets, is investigated using a one-dimensional hybrid model. Kinetic effects such as finite-Larmor radius and nonlinear Landau damping, which become significant for plasmas with β∼ 1. are appropriately accounted for in these high-resolution hybrid simulations. Spatio-temporal evolution, of the left-hand polarized (LHP) wave packets, shows that they collapse because of the decreasing dispersive effects. However, singularities are arrested by the wave-particle interactions. At some critical time te, which depends on the plasma β and the initial amplitude of the wave packet, we observe a turning point. At this turning point, the polarization changes from LHP to RHP (right-hand polarized). The wave packet then starts broadening due to increasing dispersion associated with the RHP. Implications of collapse of the magnetic structures are briefly discussed.

    Original languageEnglish
    Pages (from-to)3998-4003
    Number of pages6
    JournalPhysics of Plasmas
    Volume7
    Issue number10
    DOIs
    Publication statusPublished - Jan 1 2000

    Fingerprint

    wave packets
    simulation
    wave-particle interactions
    Larmor radius
    Landau damping
    high resolution
    kinetics
    polarization

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics

    Cite this

    Buti, B., Velli, M., Liewer, P. C., Goldstein, B. E., & Hada, T. (2000). Hybrid simulations of collapse of Alfvénic wave packets. Physics of Plasmas, 7(10), 3998-4003. https://doi.org/10.1063/1.1289890

    Hybrid simulations of collapse of Alfvénic wave packets. / Buti, B.; Velli, M.; Liewer, P. C.; Goldstein, B. E.; Hada, Tohru.

    In: Physics of Plasmas, Vol. 7, No. 10, 01.01.2000, p. 3998-4003.

    Research output: Contribution to journalArticle

    Buti, B, Velli, M, Liewer, PC, Goldstein, BE & Hada, T 2000, 'Hybrid simulations of collapse of Alfvénic wave packets', Physics of Plasmas, vol. 7, no. 10, pp. 3998-4003. https://doi.org/10.1063/1.1289890
    Buti, B. ; Velli, M. ; Liewer, P. C. ; Goldstein, B. E. ; Hada, Tohru. / Hybrid simulations of collapse of Alfvénic wave packets. In: Physics of Plasmas. 2000 ; Vol. 7, No. 10. pp. 3998-4003.
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