Acceleration of charged particles by large amplitude MHD waves: Effect of wave spatial correlation

Yasuhiro Kuramitsu, Tohru Hada

    Research output: Contribution to journalArticle

    24 Citations (Scopus)

    Abstract

    We discuss energy diffusion and acceleration of charged particles by large amplitude magnetohydrodynamic (MHD) waves by test particle simulations, paying particular attention to the effects of phase correlation of the waves. In quasi-linear theory, the wave phases are assumed to be random, but in reality, interaction between different wave modes may produce phase correlation. When the wave phases are strongly correlated, the waveform appears as spatially localized traveling wave packet. These wave packets can efficiently accelerate charged particles, as they are repeatedly mirror reflected by oppositely propagating wave packets: a process analogous to the Fermi acceleration.

    Original languageEnglish
    Pages (from-to)629-632
    Number of pages4
    JournalGeophysical Research Letters
    Volume27
    Issue number5
    DOIs
    Publication statusPublished - Mar 1 2000

    All Science Journal Classification (ASJC) codes

    • Geophysics
    • Earth and Planetary Sciences(all)

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