Kinetic simulation of electron injection by electrostatic waves

M.E. Dieckmann, B. Eliasson, A. Stathopoulos, A. Ynnerman

Research output: Contribution to journalArticle

Abstract

Radio-synchrotron emission is evidence for relativistic electrons at supernova remnant shocks. These electrons may have been accelerated by Fermi acceleration at perpendicular shocks which requires them to have initial energies above 100 keV. Such electrons cannot be found in the interstellar medium. Previous particle-in-cell (PIC) simulations have shown that the transport of electrons across a magnetic field by an electrostatic wave can, in principle, accelerate electrons to such energies. However, there it was also shown that the wave is unstable and that the resulting acceleration is shortlived. Here we compare results obtained from PIC with those from Vlasov simulations for identical plasma parameters. We show that the life-time of the wave in the Vlasov simulations substantially exceeds previous findings, in principle allowing for electron acceleration to relativistic speeds.
Original languageEnglish
Pages (from-to)284-288
Number of pages5
JournalBaltic Astronomy
Volume13
Issue number2
Publication statusPublished - 2004

Keywords

  • plasmas
  • waves
  • turbulence
  • supernova remnants

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