Lower hybrid-resonance acceleration of electrons and ions in solar-flares and the associated microwave emission

K. G. McClements, R. Bingham, J. J. Su, J. M. Dawson, D. S. Spicer

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

The particle acceleration processes here studied are driven by the relaxation of unstable ion ring distributions; these produce strong wave activity at the lower hybrid resonance frequency which collapses, and forms energetic electron and ion tails. The results obtained are applied to the problem posed by the production of energetic particles by solar flares. The numerical simulation results thus obtained by a 2 1/2-dimensional particle-in-cell code show a simultaneous acceleration of electrons to 10-500 keV energies, and of ions to as much as the 1 MeV range; the energy of the latter is still insufficient to account for gamma-ray emission in the 4-6 MeV range, but furnish a seed population for further acceleration.
LanguageEnglish
Pages465-475
Number of pages11
JournalAstrophysical Journal
Volume409
Issue number1
DOIs
Publication statusPublished - May 1993

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microwave emission
solar flares
electron
ion
energetics
ions
electrons
particle acceleration
energetic particles
energy
seeds
gamma rays
seed
rings
simulation
particle
microwave

Keywords

  • electron acceleration
  • solar flares
  • microwave emission

Cite this

McClements, K. G. ; Bingham, R. ; Su, J. J. ; Dawson, J. M. ; Spicer, D. S. / Lower hybrid-resonance acceleration of electrons and ions in solar-flares and the associated microwave emission. In: Astrophysical Journal. 1993 ; Vol. 409, No. 1. pp. 465-475.
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Lower hybrid-resonance acceleration of electrons and ions in solar-flares and the associated microwave emission. / McClements, K. G.; Bingham, R.; Su, J. J.; Dawson, J. M.; Spicer, D. S.

In: Astrophysical Journal, Vol. 409, No. 1, 05.1993, p. 465-475.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Lower hybrid-resonance acceleration of electrons and ions in solar-flares and the associated microwave emission

AU - McClements, K. G.

AU - Bingham, R.

AU - Su, J. J.

AU - Dawson, J. M.

AU - Spicer, D. S.

PY - 1993/5

Y1 - 1993/5

N2 - The particle acceleration processes here studied are driven by the relaxation of unstable ion ring distributions; these produce strong wave activity at the lower hybrid resonance frequency which collapses, and forms energetic electron and ion tails. The results obtained are applied to the problem posed by the production of energetic particles by solar flares. The numerical simulation results thus obtained by a 2 1/2-dimensional particle-in-cell code show a simultaneous acceleration of electrons to 10-500 keV energies, and of ions to as much as the 1 MeV range; the energy of the latter is still insufficient to account for gamma-ray emission in the 4-6 MeV range, but furnish a seed population for further acceleration.

AB - The particle acceleration processes here studied are driven by the relaxation of unstable ion ring distributions; these produce strong wave activity at the lower hybrid resonance frequency which collapses, and forms energetic electron and ion tails. The results obtained are applied to the problem posed by the production of energetic particles by solar flares. The numerical simulation results thus obtained by a 2 1/2-dimensional particle-in-cell code show a simultaneous acceleration of electrons to 10-500 keV energies, and of ions to as much as the 1 MeV range; the energy of the latter is still insufficient to account for gamma-ray emission in the 4-6 MeV range, but furnish a seed population for further acceleration.

KW - electron acceleration

KW - solar flares

KW - microwave emission

U2 - 10.1086/172679

DO - 10.1086/172679

M3 - Article

VL - 409

SP - 465

EP - 475

JO - Astrophysical Journal

T2 - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

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