Generation of electromagnetic waves and Alfven waves during coalescence of magnetic islands in pair plasmas

J.-I. Sakai, T. Haruki, Torsten Neubert

Research output: Contribution to journalConference articleResearchpeer-review


It is shown by using a 2-D fully relativistic electromagnetic particle-in-cell (PIC) code that the tearing instability in a current sheet of pair plasmas is caused by Landau resonances of both electrons and positrons. Strong magnetic flux can be generated during coalescence of magnetic islands in the nonlinear phase of the tearing instability. The magnetic flux produced in an O-type magnetic island is caused from the counter-streaming instability found by Kazimura et al. (1998). It is also shown that charge separation with a quadrupole-like structure is generated from the localized strong magnetic flux. During the decay of the quadrupole-like charge structure as well as the magnetic flux, there appear wave emission with high-frequency electromagnetic waves and Alfven waves as well as Langmuir waves. We also show by using a 3-D PIC code that current filaments associated with the O-type magnetic islands become unstable against the kink instability during the coalescence of current filaments.
Original languageEnglish
JournalPhysica Scripta
Pages (from-to)42-46
Publication statusPublished - 2000
Externally publishedYes
EventInternational Topical Conference on Plasma Physics: New Frontiers in Nonlinear Sciences - University of Algarve, Faro, Portugal
Duration: 6 Sep 199910 Sep 1999


ConferenceInternational Topical Conference on Plasma Physics
LocationUniversity of Algarve

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