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Title: Nonlinear sub-cyclotron resonance as a formation mechanism for gaps in banded chorus

Abstract

An interesting characteristic of magnetospheric chorus is the presence of a frequency gap at ω ≃ 0.5Ωe, where Ωe is the electron cyclotron angular frequency. Recent chorus observations sometimes show additional gaps near 0.3Ωe and 0.6Ωe. Here we present a novel nonlinear mechanism for the formation of these gaps using Hamiltonian theory and test particle simulations in a homogeneous, magnetized, collisionless plasma. We find that an oblique whistler wave with frequency at a fraction of the electron cyclotron frequency can resonate with electrons, leading to effective energy exchange between the wave and particles.

Authors:
 [1];  [1]; ORCiD logo [2];  [3]
+ Show Author Affiliations
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. University of Michigan, Ann Arbor, MI (United States)
  3. Space Science Institute, Boulder, CO (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1221222
Report Number(s):
LA-UR-15-20444
Journal ID: ISSN 0094-8276
Grant/Contract Number:  
NNH11AR75I; AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Geophysical Research Letters
Additional Journal Information:
Journal Volume: 42; Journal Issue: 9; Journal ID: ISSN 0094-8276
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Fu, Xiangrong, Guo, Zehua, Dong, Chuanfei, and Gary, S. Peter. Nonlinear sub-cyclotron resonance as a formation mechanism for gaps in banded chorus. United States: N. p., 2015. Web. doi:10.1002/2015GL064182.
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Fu, Xiangrong, Guo, Zehua, Dong, Chuanfei, & Gary, S. Peter. Nonlinear sub-cyclotron resonance as a formation mechanism for gaps in banded chorus. United States. https://doi.org/10.1002/2015GL064182
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Fu, Xiangrong, Guo, Zehua, Dong, Chuanfei, and Gary, S. Peter. Thu . "Nonlinear sub-cyclotron resonance as a formation mechanism for gaps in banded chorus". United States. https://doi.org/10.1002/2015GL064182. https://www.osti.gov/servlets/purl/1221222.
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@article{osti_1221222,
title = {Nonlinear sub-cyclotron resonance as a formation mechanism for gaps in banded chorus},
author = {Fu, Xiangrong and Guo, Zehua and Dong, Chuanfei and Gary, S. Peter},
abstractNote = {An interesting characteristic of magnetospheric chorus is the presence of a frequency gap at ω ≃ 0.5Ωe, where Ωe is the electron cyclotron angular frequency. Recent chorus observations sometimes show additional gaps near 0.3Ωe and 0.6Ωe. Here we present a novel nonlinear mechanism for the formation of these gaps using Hamiltonian theory and test particle simulations in a homogeneous, magnetized, collisionless plasma. We find that an oblique whistler wave with frequency at a fraction of the electron cyclotron frequency can resonate with electrons, leading to effective energy exchange between the wave and particles.},
doi = {10.1002/2015GL064182},
journal = {Geophysical Research Letters},
number = 9,
volume = 42,
place = {United States},
year = {Thu May 14 00:00:00 EDT 2015},
month = {Thu May 14 00:00:00 EDT 2015}
}
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https://doi.org/10.1002/2015GL064182
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Works referenced in this record:

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Rapid local acceleration of relativistic radiation-belt electrons by magnetospheric chorus
journal, December 2013

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    Works referencing / citing this record:

    Oblique Whistler-Mode Waves in the Earth’s Inner Magnetosphere: Energy Distribution, Origins, and Role in Radiation Belt Dynamics
    journal, April 2016

    • Artemyev, Anton; Agapitov, Oleksiy; Mourenas, Didier
    • Space Science Reviews, Vol. 200, Issue 1-4
    • DOI: 10.1007/s11214-016-0252-5

    Nonlinear Coupling Between Whistler‐Mode Chorus and Electron Cyclotron Harmonic Waves in the Magnetosphere
    journal, December 2018

    • Gao, Zhonglei; Su, Zhenpeng; Xiao, Fuliang
    • Geophysical Research Letters, Vol. 45, Issue 23
    • DOI: 10.1029/2018gl080635

    Nonlinear Damping of Oblique Whistler Mode Waves Via Landau Resonance
    journal, September 2018

    • Hsieh, Yi-Kai; Omura, Yoshiharu
    • Journal of Geophysical Research: Space Physics, Vol. 123, Issue 9
    • DOI: 10.1029/2018ja025848
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