Journal cover Journal topic
Annales Geophysicae An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.585 IF 1.585
  • IF 5-year value: 1.698 IF 5-year
    1.698
  • CiteScore value: 1.62 CiteScore
    1.62
  • SNIP value: 0.820 SNIP 0.820
  • IPP value: 1.52 IPP 1.52
  • SJR value: 0.781 SJR 0.781
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 83 Scimago H
    index 83
  • h5-index value: 24 h5-index 24
Discussion papers
https://doi.org/10.5194/angeo-2019-139
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-2019-139
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: regular paper 27 Sep 2019

Submitted as: regular paper | 27 Sep 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Annales Geophysicae (ANGEO).

BD-IES Observation of Multi-Period Electron Flux Modulation Caused by Localized Ultra-Low Frequency Waves

Xingran Chen, Qiugang Zong, Hong Zou, Xuzhi Zhou, Li Li, Yixin Hao, and Yongfu Wang Xingran Chen et al.
  • Institute of Space Physics and Applied Technology, School of Earth and Space Sciences, Peking University, Beijing, China

Abstract. We present multi-period modulation of energetic electron flux observed by the BeiDa Imaging Electron Spectrometer (BD-IES) onboard a Chinese navigation satellite on October 13, 2015. Electron flux oscillations were observed at a dominant period of ~ 190 s in consecutive energy channels from ~ 50 keV to ~ 200 keV. Interestingly, flux modulations at a secondary period of ~ 400 s were also unambiguously observed. The oscillating signals at different energy channels were observed in sequence, with a time delay of up to ~ 900 s. This time delay far exceeds the oscillating periods, by which we speculate that the modulations were caused by localized ultra-low frequency (ULF) waves. To verify the wave-particle interaction scenario, we revisit the classic drift-resonance theory. We adopt the calculation scheme therein to derive the electron energy change in a multi-period ULF wave field. Then, based on the modeled energy change, we construct the flux variations to be observed by a virtual spacecraft. The predicted particle signatures well agree with the BD-IES observations. We demonstrate that the particle energy change might be underestimated in the conventional theories, as the Betatron acceleration induced by the curl of the wave electron field was often omitted. In addition, we show that azimuthally localized waves would notably extend the energy width of the resonance peak, whereas the drift-resonance interaction is only efficient for particles at the resonant energy in the original theory.

Xingran Chen et al.
Interactive discussion
Status: open (until 17 Dec 2019)
Status: open (until 17 Dec 2019)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Xingran Chen et al.
Xingran Chen et al.
Viewed  
Total article views: 171 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
133 35 3 171 10 2 2
  • HTML: 133
  • PDF: 35
  • XML: 3
  • Total: 171
  • Supplement: 10
  • BibTeX: 2
  • EndNote: 2
Views and downloads (calculated since 27 Sep 2019)
Cumulative views and downloads (calculated since 27 Sep 2019)
Viewed (geographical distribution)  
Total article views: 123 (including HTML, PDF, and XML) Thereof 123 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 14 Nov 2019
Publications Copernicus
Download
Short summary
We present a new in-situ observation of energetic electron in space obtained by a newly available particle detector. In view of the characteristic signatures in the particle flux, we attribute the observational features to the drift-resonance wave-particle interaction between energetic electrons and multiple localized ULF waves. The scenario is substantiate by a numerical calculation based on the revised drift-resonance theory which reproduced the observed particle signatures.
We present a new in-situ observation of energetic electron in space obtained by a newly...
Citation