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Title: Characteristic energy range of electron scattering due to plasmaspheric hiss

Abstract

In this paper, we investigate the characteristic energy range of electron flux decay due to the interaction with plasmaspheric hiss in the Earth's inner magnetosphere. The Van Allen Probes have measured the energetic electron flux decay profiles in the Earth's outer radiation belt during a quiet period following the geomagnetic storm that occurred on 7 November 2015. The observed energy of significant electron decay increases with decreasing L shell and is well correlated with the energy band corresponding to the first adiabatic invariant μ = 4–200 MeV/G. The electron diffusion coefficients due to hiss scattering are calculated at L = 2–6, and the modeled energy band of effective pitch angle scattering is also well correlated with the constant μ lines and is consistent with the observed energy range of electron decay. Using the previously developed statistical plasmaspheric hiss model during modestly disturbed periods, we perform a 2-D Fokker-Planck simulation of the electron phase space density evolution at L = 3.5 and demonstrate that plasmaspheric hiss causes the significant decay of 100 keV–1 MeV electrons with the largest decay rate occurring at around 340 keV, forming anisotropic pitch angle distributions at lower energies and more flattened distributions at higher energies. Finally,more » our study provides reasonable estimates of the electron populations that can be most significantly affected by plasmaspheric hiss and the consequent electron decay profiles.« less

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [7]; ORCiD logo [7]; ORCiD logo [7];  [8]
  1. Univ. of California, Los Angeles, CA (United States). Dept. of Atmospheric and Oceanic Sciences
  2. Univ. of California, Los Angeles, CA (United States). Dept. of Atmospheric and Oceanic Sciences; Boston Univ., MA (United States). Center for Space Physics
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  4. Univ. of Iowa, Iowa City, IA (United States). Dept. of Physics and Astronomy
  5. Univ. of New Hampshire, Durham, NH (United States). Inst. for the Study of Earth, Oceans, and Space
  6. Univ. of Colorado, Boulder, CO (United States). Lab. for Atmospheric and Space Physics
  7. The Aerospace Corporation, Los Angeles, CA (United States). Space Sciences Dept.
  8. Univ. of California, Los Angeles, CA (United States). Dept. of Earth, Planetary and Space Sciences. Inst. of Geophysics and Planetary Physics
Publication Date:
Research Org.:
Univ. of California, Los Angeles, CA (United States); The Aerospace Corporation, Los Angeles, CA (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); National Aeronautics and Space Administration (NASA); National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR)
OSTI Identifier:
1402625
Report Number(s):
LA-UR-17-20875
Journal ID: ISSN 2169-9380; TRN: US1703014
Grant/Contract Number:  
AC52-06NA25396; SC0010578; NAS5-01072; NNX15AI96G; NNX15AF61G; NNX14AN85G; NNX13AI61G; NNX14AI18G; 967399; 921647; AGS 1405054; 1564510; FA9550-15-1-0158
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Geophysical Research. Space Physics
Additional Journal Information:
Journal Volume: 121; Journal Issue: 12; Journal ID: ISSN 2169-9380
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; plasmaspheric hiss; electron flux decay; pitch angle scattering; Van Allen Probes observation

Citation Formats

Ma, Q., Li, W., Thorne, R. M., Bortnik, J., Reeves, G. D., Kletzing, C. A., Kurth, W. S., Hospodarsky, G. B., Spence, H. E., Baker, D. N., Blake, J. B., Fennell, J. F., Claudepierre, S. G., and Angelopoulos, V. Characteristic energy range of electron scattering due to plasmaspheric hiss. United States: N. p., 2016. Web. doi:10.1002/2016JA023311.
Ma, Q., Li, W., Thorne, R. M., Bortnik, J., Reeves, G. D., Kletzing, C. A., Kurth, W. S., Hospodarsky, G. B., Spence, H. E., Baker, D. N., Blake, J. B., Fennell, J. F., Claudepierre, S. G., & Angelopoulos, V. Characteristic energy range of electron scattering due to plasmaspheric hiss. United States. https://doi.org/10.1002/2016JA023311
Ma, Q., Li, W., Thorne, R. M., Bortnik, J., Reeves, G. D., Kletzing, C. A., Kurth, W. S., Hospodarsky, G. B., Spence, H. E., Baker, D. N., Blake, J. B., Fennell, J. F., Claudepierre, S. G., and Angelopoulos, V. Tue . "Characteristic energy range of electron scattering due to plasmaspheric hiss". United States. https://doi.org/10.1002/2016JA023311. https://www.osti.gov/servlets/purl/1402625.
@article{osti_1402625,
title = {Characteristic energy range of electron scattering due to plasmaspheric hiss},
author = {Ma, Q. and Li, W. and Thorne, R. M. and Bortnik, J. and Reeves, G. D. and Kletzing, C. A. and Kurth, W. S. and Hospodarsky, G. B. and Spence, H. E. and Baker, D. N. and Blake, J. B. and Fennell, J. F. and Claudepierre, S. G. and Angelopoulos, V.},
abstractNote = {In this paper, we investigate the characteristic energy range of electron flux decay due to the interaction with plasmaspheric hiss in the Earth's inner magnetosphere. The Van Allen Probes have measured the energetic electron flux decay profiles in the Earth's outer radiation belt during a quiet period following the geomagnetic storm that occurred on 7 November 2015. The observed energy of significant electron decay increases with decreasing L shell and is well correlated with the energy band corresponding to the first adiabatic invariant μ = 4–200 MeV/G. The electron diffusion coefficients due to hiss scattering are calculated at L = 2–6, and the modeled energy band of effective pitch angle scattering is also well correlated with the constant μ lines and is consistent with the observed energy range of electron decay. Using the previously developed statistical plasmaspheric hiss model during modestly disturbed periods, we perform a 2-D Fokker-Planck simulation of the electron phase space density evolution at L = 3.5 and demonstrate that plasmaspheric hiss causes the significant decay of 100 keV–1 MeV electrons with the largest decay rate occurring at around 340 keV, forming anisotropic pitch angle distributions at lower energies and more flattened distributions at higher energies. Finally, our study provides reasonable estimates of the electron populations that can be most significantly affected by plasmaspheric hiss and the consequent electron decay profiles.},
doi = {10.1002/2016JA023311},
journal = {Journal of Geophysical Research. Space Physics},
number = 12,
volume = 121,
place = {United States},
year = {Tue Nov 15 00:00:00 EST 2016},
month = {Tue Nov 15 00:00:00 EST 2016}
}

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Works referencing / citing this record:

Statistical Analysis on Plasmatrough Exohiss Waves From the Van Allen Probes
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Triggered Plasmaspheric Hiss: Rising Tone Structures
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Comparison of Electron Loss Models in the Inner Magnetosphere During the 2013 St. Patrick's Day Geomagnetic Storm
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Van Allen Probes observation of plasmaspheric hiss modulated by injected energetic electrons
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