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Title: RAM-SCB simulations of electron transport and plasma wave scattering during the October 2012 “double-dip” storm

Abstract

Here, mechanisms for electron injection, trapping, and loss in the near-Earth space environment are investigated during the October 2012 “double-dip” storm using our magnetically self-consistent ring current model (RAM-SCB). Pitch angle and energy scattering are included for the first time in RAM-SCB using L and magnetic local time (MLT) dependent event-specific chorus wave models inferred from NOAA POES and Van Allen Probes EMFISIS observations. The dynamics of the source (~10s keV) and seed (~100s keV) populations of the radiation belts simulated with RAM-SCB is compared with Van Allen Probes MagEIS observations in the morning sector and with measurements from NOAA-15 satellite in the predawn and afternoon MLT sectors. We find that although the low-energy (E < 100 keV) electron fluxes are in good agreement with observations, increasing significantly by magnetospheric convection during both SYM-H dips while decreasing during the intermediate recovery phase, the injection of high-energy electrons is underestimated by this mechanism throughout the storm. Local acceleration by chorus waves intensifies the electron fluxes at E ≥ 50 keV considerably and RAM-SCB simulations overestimate the observed trapped fluxes by more than an order of magnitude; the simulated with RAM-SCB precipitating fluxes are weaker and their temporal and spatial evolution agreemore » well with POES/MEPED data.« less

Authors:
 [1];  [2];  [1]; ORCiD logo [1];  [1]; ORCiD logo [1];  [3]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. West Virginia Univ., Morgantown, WV (United States)
  3. Univ. of Iowa, Iowa City, IA (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1327076
Alternate Identifier(s):
OSTI ID: 1325645; OSTI ID: 1327436
Report Number(s):
LA-UR-16-20660
Journal ID: ISSN 2169-9380
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article: Published Article
Journal Name:
Journal of Geophysical Research. Space Physics
Additional Journal Information:
Journal Name: Journal of Geophysical Research. Space Physics; Journal ID: ISSN 2169-9380
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; Heliospheric and Magnetospheric Physics

Citation Formats

Jordanova, Vania Koleva, Tu, Weichao, Chen, Yue, Morley, Steven Karl, Panaitescu, Alin -Daniel, Reeves, Geoffrey D., and Kletzing, Craig A. RAM-SCB simulations of electron transport and plasma wave scattering during the October 2012 “double-dip” storm. United States: N. p., 2016. Web. doi:10.1002/2016JA022470.
Jordanova, Vania Koleva, Tu, Weichao, Chen, Yue, Morley, Steven Karl, Panaitescu, Alin -Daniel, Reeves, Geoffrey D., & Kletzing, Craig A. RAM-SCB simulations of electron transport and plasma wave scattering during the October 2012 “double-dip” storm. United States. doi:10.1002/2016JA022470.
Jordanova, Vania Koleva, Tu, Weichao, Chen, Yue, Morley, Steven Karl, Panaitescu, Alin -Daniel, Reeves, Geoffrey D., and Kletzing, Craig A. Thu . "RAM-SCB simulations of electron transport and plasma wave scattering during the October 2012 “double-dip” storm". United States. doi:10.1002/2016JA022470.
@article{osti_1327076,
title = {RAM-SCB simulations of electron transport and plasma wave scattering during the October 2012 “double-dip” storm},
author = {Jordanova, Vania Koleva and Tu, Weichao and Chen, Yue and Morley, Steven Karl and Panaitescu, Alin -Daniel and Reeves, Geoffrey D. and Kletzing, Craig A.},
abstractNote = {Here, mechanisms for electron injection, trapping, and loss in the near-Earth space environment are investigated during the October 2012 “double-dip” storm using our magnetically self-consistent ring current model (RAM-SCB). Pitch angle and energy scattering are included for the first time in RAM-SCB using L and magnetic local time (MLT) dependent event-specific chorus wave models inferred from NOAA POES and Van Allen Probes EMFISIS observations. The dynamics of the source (~10s keV) and seed (~100s keV) populations of the radiation belts simulated with RAM-SCB is compared with Van Allen Probes MagEIS observations in the morning sector and with measurements from NOAA-15 satellite in the predawn and afternoon MLT sectors. We find that although the low-energy (E < 100 keV) electron fluxes are in good agreement with observations, increasing significantly by magnetospheric convection during both SYM-H dips while decreasing during the intermediate recovery phase, the injection of high-energy electrons is underestimated by this mechanism throughout the storm. Local acceleration by chorus waves intensifies the electron fluxes at E ≥ 50 keV considerably and RAM-SCB simulations overestimate the observed trapped fluxes by more than an order of magnitude; the simulated with RAM-SCB precipitating fluxes are weaker and their temporal and spatial evolution agree well with POES/MEPED data.},
doi = {10.1002/2016JA022470},
journal = {Journal of Geophysical Research. Space Physics},
number = ,
volume = ,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2016},
month = {Thu Sep 01 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1002/2016JA022470

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Cited by: 1 work
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