Excitation of electron acoustic waves near the electron plasma frequency and at twice the plasma frequency

D. Schriver, M. Ashour-Abdalla, V. Sotnikov, P. Helinger, V. Fiala, R. Bingham, A. Mangeney

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

In this paper we investigate the nonlinear development of the electron acoustic instability that can lead to the transfer of wave energy to frequencies just above the electron plasma frequency (ωpe) and to waves with approximately twice the electron plasma frequency (2ωpe). Using plasma conditions in the upstream electron foreshock region based on data from the AMPTE-UKS spacecraft, an electron beam is considered in plasma containing a background of hot and cold electrons. This leads to the linear excitation of large-amplitude electron acoustic waves at frequencies between about 0.8 and 1.0 ωpe. A modified decay instability then excites waves in the spectrum just above ωpe. This is followed by a second nonlinear coalescence process that causes the excitation of waves at frequencies just below 2ωpe. The linear and nonlinear properties of the electron acoustic instability are examined for observed conditions using analytical theory, particle-in-cell simulations, and Vlasov simulations. These results have application to observations made inside the electron foreshock region, as well as the polar cap and auroral zone, where plasma oscillations and waves at 2ωpe are observed.
LanguageEnglish
Pages12919-12927
Number of pages9
JournalJournal of Geophysical Research
Volume105
Issue numberA6
DOIs
Publication statusPublished - 1 Jun 2000

Fingerprint

acoustic wave
plasma frequencies
electron plasma
electrons
Acoustic waves
Plasmas
plasma
electron
acoustics
Electrons
acoustic instability
excitation
foreshock
AMPTE (satellites)
auroral zones
particle theory
plasma oscillations
Acoustics
polar caps
Plasma oscillations

Keywords

  • electron plasma waves
  • plasma frequency
  • acoustic waves

Cite this

Schriver, D. ; Ashour-Abdalla, M. ; Sotnikov, V. ; Helinger, P. ; Fiala, V. ; Bingham, R. ; Mangeney, A. / Excitation of electron acoustic waves near the electron plasma frequency and at twice the plasma frequency. In: Journal of Geophysical Research. 2000 ; Vol. 105, No. A6. pp. 12919-12927.
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abstract = "In this paper we investigate the nonlinear development of the electron acoustic instability that can lead to the transfer of wave energy to frequencies just above the electron plasma frequency (ωpe) and to waves with approximately twice the electron plasma frequency (2ωpe). Using plasma conditions in the upstream electron foreshock region based on data from the AMPTE-UKS spacecraft, an electron beam is considered in plasma containing a background of hot and cold electrons. This leads to the linear excitation of large-amplitude electron acoustic waves at frequencies between about 0.8 and 1.0 ωpe. A modified decay instability then excites waves in the spectrum just above ωpe. This is followed by a second nonlinear coalescence process that causes the excitation of waves at frequencies just below 2ωpe. The linear and nonlinear properties of the electron acoustic instability are examined for observed conditions using analytical theory, particle-in-cell simulations, and Vlasov simulations. These results have application to observations made inside the electron foreshock region, as well as the polar cap and auroral zone, where plasma oscillations and waves at 2ωpe are observed.",
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Schriver, D, Ashour-Abdalla, M, Sotnikov, V, Helinger, P, Fiala, V, Bingham, R & Mangeney, A 2000, 'Excitation of electron acoustic waves near the electron plasma frequency and at twice the plasma frequency' Journal of Geophysical Research, vol. 105, no. A6, pp. 12919-12927. https://doi.org/10.1029/1999JA000301

Excitation of electron acoustic waves near the electron plasma frequency and at twice the plasma frequency. / Schriver, D.; Ashour-Abdalla, M.; Sotnikov, V.; Helinger, P.; Fiala, V.; Bingham, R.; Mangeney, A.

In: Journal of Geophysical Research, Vol. 105, No. A6, 01.06.2000, p. 12919-12927.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Excitation of electron acoustic waves near the electron plasma frequency and at twice the plasma frequency

AU - Schriver, D.

AU - Ashour-Abdalla, M.

AU - Sotnikov, V.

AU - Helinger, P.

AU - Fiala, V.

AU - Bingham, R.

AU - Mangeney, A.

PY - 2000/6/1

Y1 - 2000/6/1

N2 - In this paper we investigate the nonlinear development of the electron acoustic instability that can lead to the transfer of wave energy to frequencies just above the electron plasma frequency (ωpe) and to waves with approximately twice the electron plasma frequency (2ωpe). Using plasma conditions in the upstream electron foreshock region based on data from the AMPTE-UKS spacecraft, an electron beam is considered in plasma containing a background of hot and cold electrons. This leads to the linear excitation of large-amplitude electron acoustic waves at frequencies between about 0.8 and 1.0 ωpe. A modified decay instability then excites waves in the spectrum just above ωpe. This is followed by a second nonlinear coalescence process that causes the excitation of waves at frequencies just below 2ωpe. The linear and nonlinear properties of the electron acoustic instability are examined for observed conditions using analytical theory, particle-in-cell simulations, and Vlasov simulations. These results have application to observations made inside the electron foreshock region, as well as the polar cap and auroral zone, where plasma oscillations and waves at 2ωpe are observed.

AB - In this paper we investigate the nonlinear development of the electron acoustic instability that can lead to the transfer of wave energy to frequencies just above the electron plasma frequency (ωpe) and to waves with approximately twice the electron plasma frequency (2ωpe). Using plasma conditions in the upstream electron foreshock region based on data from the AMPTE-UKS spacecraft, an electron beam is considered in plasma containing a background of hot and cold electrons. This leads to the linear excitation of large-amplitude electron acoustic waves at frequencies between about 0.8 and 1.0 ωpe. A modified decay instability then excites waves in the spectrum just above ωpe. This is followed by a second nonlinear coalescence process that causes the excitation of waves at frequencies just below 2ωpe. The linear and nonlinear properties of the electron acoustic instability are examined for observed conditions using analytical theory, particle-in-cell simulations, and Vlasov simulations. These results have application to observations made inside the electron foreshock region, as well as the polar cap and auroral zone, where plasma oscillations and waves at 2ωpe are observed.

KW - electron plasma waves

KW - plasma frequency

KW - acoustic waves

U2 - 10.1029/1999JA000301

DO - 10.1029/1999JA000301

M3 - Article

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SP - 12919

EP - 12927

JO - Journal of Geophysical Research: Oceans

T2 - Journal of Geophysical Research: Oceans

JF - Journal of Geophysical Research: Oceans

SN - 0148-0227

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ER -