Pitch Angle Scattering and Loss of Radiation Belt Electrons in Broadband Electromagnetic Waves

Chaston, C. C.; Bonnell, J. W.; Halford, A. J.; Reeves, Geoffrey D.; Baker, D. N.; Kletzing, C. A.; Wygant, J. R.

doi:10.1029/2018GL079527

Title: Pitch Angle Scattering and Loss of Radiation Belt Electrons in Broadband Electromagnetic Waves

Abstract

A magnetic conjunction between Van Allen Probes spacecraft and the Balloon Array for Radiation-belt Relativistic Electron Losses (BARREL) demonstrates the simultaneous occurrence of broadband Alfvénic fluctuations and multi-timescale modulation of enhanced atmospheric X-ray bremsstrahlung emission. The properties of the Alfvénic fluctuations are utilized to build a model for pitch angle scattering in the outer radiation belt on electron gyro-radii scale field structures. It is observed that this scattering may lead to the transport of electrons into the loss cone over an energy range from hundreds of keV to multi-MeV on diffusive timescales on the order of hours. This process may account for modulation of atmospheric X-ray fluxes observed from balloons and constitute a significant loss process for the radiation belts.

Authors:

^[1]; Bonnell, J. W. ^[1];

^[2];

^[3];

^[4];

^[5];

^[6]

Univ. of California, Berkeley, CA (United States)
Aerospace Corp., Chantilly, VA (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of Colorado, Boulder, CO (United States)
Univ. of Iowa, Iowa City, IA (United States)
Univ. of Minnesota, Minneapolis, MN (United States)

Publication Date:: Wed Sep 05 00:00:00 EDT 2018

Research Org.:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA); National Aeronautics and Space Administration (NASA); Johns Hopkins University Applied Physics Laboratory (JHU/APL)

OSTI Identifier:: 1558051

Report Number(s):: LA-UR-18-28973
Journal ID: ISSN 0094-8276

Grant/Contract Number:: 89233218CNA000001

Resource Type:: Accepted Manuscript

Journal Name:: Geophysical Research Letters

Additional Journal Information:: Journal Volume: 45; Journal Issue: 18; Journal ID: ISSN 0094-8276

Publisher:: American Geophysical Union

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 79 ASTRONOMY AND ASTROPHYSICS; Alfven waves; radiation belts; pitch angle scattering; drift‐bounce resonance; geomagnetic storms; energetic particles

Citation Formats


                    Chaston, C. C., Bonnell, J. W., Halford, A. J., Reeves, Geoffrey D., Baker, D. N., Kletzing, C. A., and Wygant, J. R. Pitch Angle Scattering and Loss of Radiation Belt Electrons in Broadband Electromagnetic Waves.  United States: N. p., 2018. 
Web.  doi:10.1029/2018GL079527.

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                    Chaston, C. C., Bonnell, J. W., Halford, A. J., Reeves, Geoffrey D., Baker, D. N., Kletzing, C. A., & Wygant, J. R. Pitch Angle Scattering and Loss of Radiation Belt Electrons in Broadband Electromagnetic Waves.  United States.  https://doi.org/10.1029/2018GL079527

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                    Chaston, C. C., Bonnell, J. W., Halford, A. J., Reeves, Geoffrey D., Baker, D. N., Kletzing, C. A., and Wygant, J. R. Wed .  
"Pitch Angle Scattering and Loss of Radiation Belt Electrons in Broadband Electromagnetic Waves".  United States.  https://doi.org/10.1029/2018GL079527.  https://www.osti.gov/servlets/purl/1558051.

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@article{osti_1558051,

  title        = {Pitch Angle Scattering and Loss of Radiation Belt Electrons in Broadband Electromagnetic Waves},

  author       = {Chaston, C. C. and Bonnell, J. W. and Halford, A. J. and Reeves, Geoffrey D. and Baker, D. N. and Kletzing, C. A. and Wygant, J. R.},

  abstractNote = {A magnetic conjunction between Van Allen Probes spacecraft and the Balloon Array for Radiation-belt Relativistic Electron Losses (BARREL) demonstrates the simultaneous occurrence of broadband Alfvénic fluctuations and multi-timescale modulation of enhanced atmospheric X-ray bremsstrahlung emission. The properties of the Alfvénic fluctuations are utilized to build a model for pitch angle scattering in the outer radiation belt on electron gyro-radii scale field structures. It is observed that this scattering may lead to the transport of electrons into the loss cone over an energy range from hundreds of keV to multi-MeV on diffusive timescales on the order of hours. This process may account for modulation of atmospheric X-ray fluxes observed from balloons and constitute a significant loss process for the radiation belts.},

  doi          = {10.1029/2018GL079527},

  journal      = {Geophysical Research Letters},

  number       = 18,

  volume       = 45,

  place        = {United States},

  year         = {Wed Sep 05 00:00:00 EDT 2018},

  month        = {Wed Sep 05 00:00:00 EDT 2018}

}

Copy to clipboard

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Works referencing / citing this record:

Recent Advancements and Remaining Challenges Associated With Inner Magnetosphere Cross‐Energy/Population Interactions (IMCEPI)
journal, February 2019

Yu, Yiqun; Liemohn, Mike W.; Jordanova, Vania K.
Journal of Geophysical Research: Space Physics, Vol. 124, Issue 2
DOI: 10.1029/2018ja026282

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Title: Pitch Angle Scattering and Loss of Radiation Belt Electrons in Broadband Electromagnetic Waves

Abstract

Citation Formats

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Potential waves for relativistic electron scattering and stochastic acceleration during magnetic storms journal, August 1998

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Microburst precipitation of energetic electrons associated with chorus wave generation: PRECIPITATION BY CHORUS journal, April 2010

Kinetic Alfvén waves and particle response associated with a shock-induced, global ULF perturbation of the terrestrial magnetosphere: KAW FROM SHOCK IMPACT journal, November 2015

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Radiation Belt “Dropouts” and Drift‐Bounce Resonances in Broadband Electromagnetic Waves journal, March 2018

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Van Allen probes, NOAA, GOES, and ground observations of an intense EMIC wave event extending over 12 h in magnetic local time: EMIC WAVES AND THE RADIATION BELTS journal, July 2015

The Role of Localized Compressional Ultra-low Frequency Waves in Energetic Electron Precipitation journal, March 2018

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First detection of a terrestrial MeV X-ray burst
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High-resolution in situ observations of electron precipitation-causing EMIC waves: EMIC WAVES DRIVING PRECIPITATION
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Cosmic‐Ray Pitch‐Angle Scattering through 90o
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The Relativistic Electron-Proton Telescope (REPT) Instrument on Board the Radiation Belt Storm Probes (RBSP) Spacecraft: Characterization of Earth’s Radiation Belt High-Energy Particle Populations
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Testing loss mechanisms capable of rapidly depleting relativistic electron flux in the Earth's outer radiation belt
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journal, August 2017

Resonant acceleration and diffusion of outer zone electrons in an asymmetric geomagnetic field
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The Electric and Magnetic Field Instrument Suite and Integrated Science (EMFISIS) on RBSP
journal, June 2013

Precipitation of relativistic electrons by interaction with electromagnetic ion cyclotron waves
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Observations Directly Linking Relativistic Electron Microbursts to Whistler Mode Chorus: Van Allen Probes and FIREBIRD II
journal, November 2017

Quantification of relativistic electron microburst losses during the GEM storms
journal, January 2004

The Electric Field and Waves Instruments on the Radiation Belt Storm Probes Mission
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The Electric Field and Waves Instruments on the Radiation Belt Storm Probes Mission
book, January 2013

Electron pitch angle diffusion by electrostatic electron cyclotron harmonic waves: The origin of pancake distributions
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Observations of kinetic scale field line resonances
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Investigation of EMIC wave scattering as the cause for the BARREL 17 January 2013 relativistic electron precipitation event: A quantitative comparison of simulation with observations
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Microburst precipitation of energetic electrons associated with chorus wave generation: PRECIPITATION BY CHORUS
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journal, March 2007

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journal, December 2002

Rapid MeV electron precipitation as observed by SAMPEX/HILT during high-speed stream-driven storms: RAPID MEV ELECTRON PRECIPITATION AT LEO
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Van Allen probes, NOAA, GOES, and ground observations of an intense EMIC wave event extending over 12 h in magnetic local time: EMIC WAVES AND THE RADIATION BELTS
journal, July 2015

The Role of Localized Compressional Ultra-low Frequency Waves in Energetic Electron Precipitation
journal, March 2018

The causes of the hardest electron precipitation events seen with SAMPEX
journal, September 2016

A summary of the BARREL campaigns: Technique for studying electron precipitation
journal, June 2015

EMIC waves and associated relativistic electron precipitation on 25-26 January 2013: EMIC Waves and REP
journal, November 2016

Recent Advancements and Remaining Challenges Associated With Inner Magnetosphere Cross‐Energy/Population Interactions (IMCEPI)
journal, February 2019