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.
LanguageEnglish
Pages284-288
Number of pages5
JournalBaltic Astronomy
Volume13
Issue number2
Publication statusPublished - 2004

Fingerprint

electrostatic waves
injection
electron
kinetics
simulation
electrons
shock
electron acceleration
supernova remnants
cells
synchrotrons
energy
life (durability)
radio
magnetic field
plasma
magnetic fields

Keywords

  • plasmas
  • waves
  • turbulence
  • supernova remnants

Cite this

Dieckmann, M. E., Eliasson, B., Stathopoulos, A., & Ynnerman, A. (2004). Kinetic simulation of electron injection by electrostatic waves. Baltic Astronomy, 13(2), 284-288.
Dieckmann, M.E. ; Eliasson, B. ; Stathopoulos, A. ; Ynnerman, A. / Kinetic simulation of electron injection by electrostatic waves. In: Baltic Astronomy. 2004 ; Vol. 13, No. 2. pp. 284-288.
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Dieckmann, ME, Eliasson, B, Stathopoulos, A & Ynnerman, A 2004, 'Kinetic simulation of electron injection by electrostatic waves' Baltic Astronomy, vol. 13, no. 2, pp. 284-288.

Kinetic simulation of electron injection by electrostatic waves. / Dieckmann, M.E.; Eliasson, B.; Stathopoulos, A.; Ynnerman, A.

In: Baltic Astronomy, Vol. 13, No. 2, 2004, p. 284-288.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Kinetic simulation of electron injection by electrostatic waves

AU - Dieckmann, M.E.

AU - Eliasson, B.

AU - Stathopoulos, A.

AU - Ynnerman, A.

PY - 2004

Y1 - 2004

N2 - 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.

AB - 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.

KW - plasmas

KW - waves

KW - turbulence

KW - supernova remnants

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Dieckmann ME, Eliasson B, Stathopoulos A, Ynnerman A. Kinetic simulation of electron injection by electrostatic waves. Baltic Astronomy. 2004;13(2):284-288.