Relativistic particle acceleration in developing Alfvén turbulence

    Research output: Contribution to journalArticle

    10 Citations (Scopus)

    Abstract

    A new particle acceleration process in a developing Alfvén turbulence in the course of successive parametric instabilities of a relativistic pair plasma is investigated by utilizing one-dimensional electromagnetic full particle code. Coherent wave-particle interactions result in efficient particle acceleration leading to a power-law-like energy distribution function. In the simulation, high-energy particles having large relativistic masses are preferentially accelerated as the turbulence spectrum evolves in time. The main acceleration mechanism is simultaneous relativistic resonance between a particle and two different waves. An analytical expression of maximum attainable energy in such wave-particle interactions is derived.

    Original languageEnglish
    Pages (from-to)1004-1012
    Number of pages9
    JournalAstrophysical Journal
    Volume692
    Issue number2
    DOIs
    Publication statusPublished - Feb 20 2009

    Fingerprint

    wave-particle interactions
    relativistic particles
    particle acceleration
    turbulence
    particle energy
    energy distribution
    distribution functions
    electromagnetism
    simulation
    energy
    particle
    power law
    plasma

    All Science Journal Classification (ASJC) codes

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    Relativistic particle acceleration in developing Alfvén turbulence. / Matsukiyo, S.; Hada, T.

    In: Astrophysical Journal, Vol. 692, No. 2, 20.02.2009, p. 1004-1012.

    Research output: Contribution to journalArticle

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    AB - A new particle acceleration process in a developing Alfvén turbulence in the course of successive parametric instabilities of a relativistic pair plasma is investigated by utilizing one-dimensional electromagnetic full particle code. Coherent wave-particle interactions result in efficient particle acceleration leading to a power-law-like energy distribution function. In the simulation, high-energy particles having large relativistic masses are preferentially accelerated as the turbulence spectrum evolves in time. The main acceleration mechanism is simultaneous relativistic resonance between a particle and two different waves. An analytical expression of maximum attainable energy in such wave-particle interactions is derived.

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