Chorus Waves Modulation of Langmuir Waves in the Radiation Belts
Using high-resolution waveforms measured by the Van Allen Probes, we report a novel observation in the radiation belts. Namely, we show that multiband, discrete, rising-tone whistler-mode chorus emissions exhibit a one-to-one correlation with Langmuir wave bursts. Moreover, the periodic Langmuir wave bursts are generally observed at the phase location where the chorus wave E || component is oriented opposite to its propagation direction. The electron measurements show a beam in phase space density at the particle velocity that matches the parallel phase velocity of the chorus waves. Based on this evidence, we conclude that the chorus waves accelerate the suprathermal electrons via Landau resonance, and generate a localized electron beam in phase space density. Consequently, the Langmuir waves are excited locally and are modulated by the chorus wave phase. As a result, this microscale interaction between chorus waves and high frequency electrostatic waves provides a new insight into the nonlinear wave-particle interaction process.
- Authors:
-
[1]
; [1]
; [1]
; [2]
; [1]
; [1]
; [3]
; [3]
; [4]
; [5]
- Univ. of California, Los Angeles, CA (United States)
- Boston Univ., Boston, MA (United States)
- Univ. of Iowa, Iowa City, IA (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Univ. of New Hampshire, Durham, NH (United States)
- Publication Date:
- Report Number(s):
- LA-UR-17-30490
Journal ID: ISSN 0094-8276; TRN: US1800143
- Grant/Contract Number:
- AC52-06NA25396
- Type:
- Accepted Manuscript
- Journal Name:
- Geophysical Research Letters
- Additional Journal Information:
- Journal Volume: 44; Journal Issue: 23; Journal ID: ISSN 0094-8276
- Publisher:
- American Geophysical Union
- Research Org:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org:
- National Aeronautic and Space Administration (NASA); USDOE
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; Heliospheric and Magnetospheric Physics
- OSTI Identifier:
- 1410626
Li, Jinxing, Bortnik, Jacob, An, Xin, Li, Wen, Thorne, Richard M., Zhou, Meng, Kurth, William S., Hospodarsky, George B., Funsten, Herbert O., and Spence, Harlan E.. Chorus Waves Modulation of Langmuir Waves in the Radiation Belts. United States: N. p.,
Web. doi:10.1002/2017GL075877.
Li, Jinxing, Bortnik, Jacob, An, Xin, Li, Wen, Thorne, Richard M., Zhou, Meng, Kurth, William S., Hospodarsky, George B., Funsten, Herbert O., & Spence, Harlan E.. Chorus Waves Modulation of Langmuir Waves in the Radiation Belts. United States. doi:10.1002/2017GL075877.
Li, Jinxing, Bortnik, Jacob, An, Xin, Li, Wen, Thorne, Richard M., Zhou, Meng, Kurth, William S., Hospodarsky, George B., Funsten, Herbert O., and Spence, Harlan E.. 2017.
"Chorus Waves Modulation of Langmuir Waves in the Radiation Belts". United States.
doi:10.1002/2017GL075877.
@article{osti_1410626,
title = {Chorus Waves Modulation of Langmuir Waves in the Radiation Belts},
author = {Li, Jinxing and Bortnik, Jacob and An, Xin and Li, Wen and Thorne, Richard M. and Zhou, Meng and Kurth, William S. and Hospodarsky, George B. and Funsten, Herbert O. and Spence, Harlan E.},
abstractNote = {Using high-resolution waveforms measured by the Van Allen Probes, we report a novel observation in the radiation belts. Namely, we show that multiband, discrete, rising-tone whistler-mode chorus emissions exhibit a one-to-one correlation with Langmuir wave bursts. Moreover, the periodic Langmuir wave bursts are generally observed at the phase location where the chorus wave E|| component is oriented opposite to its propagation direction. The electron measurements show a beam in phase space density at the particle velocity that matches the parallel phase velocity of the chorus waves. Based on this evidence, we conclude that the chorus waves accelerate the suprathermal electrons via Landau resonance, and generate a localized electron beam in phase space density. Consequently, the Langmuir waves are excited locally and are modulated by the chorus wave phase. As a result, this microscale interaction between chorus waves and high frequency electrostatic waves provides a new insight into the nonlinear wave-particle interaction process.},
doi = {10.1002/2017GL075877},
journal = {Geophysical Research Letters},
number = 23,
volume = 44,
place = {United States},
year = {2017},
month = {11}
}