On microinstabilities in the foot of high Mach number perpendicular shocks

S. Matsukiyo, M. Scholer

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    76 Citations (Scopus)

    Abstract

    Microinstabilities excited in the foot of a supercritical perpendicular shock wave are investigated. A two-dimensional full particle simulation with periodic boundary conditions in both directions using the physical ion to electron mass ratio is performed as a proxy for the foot region where incoming and specularly reflected ions overlap. The simulation shows that six types of different instabilities are excited in a time period shorter than ion gyroperiod of the reflected ions. The most dominant instability is the modified two-stream instability, which leads to strong parallel electron heating through a so-called two step instability and to ion phase space holes.

    Original languageEnglish
    Article numberA06104
    JournalJournal of Geophysical Research: Space Physics
    Volume111
    Issue number6
    DOIs
    Publication statusPublished - Jun 1 2006

    All Science Journal Classification (ASJC) codes

    • Geophysics
    • Space and Planetary Science

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