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Communication Dans Un Congrès Année : 2016

Direct Observations of ULF and Whistler-Mode Chorus Modulation of 500eV EDI Electrons by MMS

K. W. Paulson
  • Fonction : Auteur
M. R. Argall
  • Fonction : Auteur
N. Ahmadi
R. B. Torbert
  • Fonction : Auteur
Olivier Le Contel
R. Ergun
R. J. Strangeway
  • Fonction : Auteur
W. Magnes
C. T. Russell
  • Fonction : Auteur

Résumé

We present here direct observations of chorus-wave modulated field-aligned 500 eV electrons using the Electron Drift Instrument (EDI) on board the Magnetospheric Multiscale mission. These periods of wave activity were additionally observed to be modulated by Pc5-frequency magnetic perturbations, some of which have been identified as drifting mirror-mode structures. The spacecraft encountered these mirror-mode structures just inside of the duskside magnetopause. Using the high sampling rate provided by EDI in burst sampling mode, we are able to observe the individual count fluctuations of field-aligned electrons in this region up to 512 Hz. We use the multiple look directions of EDI to generate both pitch angle and gyrophase plots of the fluctuating counts. Our observations often show unidirectional flow of these modulated electrons along the background field, and in some cases demonstrate gyrophase bunching in the wave region.
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Dates et versions

hal-02796719 , version 1 (05-06-2020)

Identifiants

  • HAL Id : hal-02796719 , version 1

Citer

K. W. Paulson, M. R. Argall, N. Ahmadi, R. B. Torbert, Olivier Le Contel, et al.. Direct Observations of ULF and Whistler-Mode Chorus Modulation of 500eV EDI Electrons by MMS. AGU Fall Meeting, Dec 2016, San Francisco, California, United States. ⟨hal-02796719⟩
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