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

Journal Article · · Journal of Geophysical Research. Space Physics
DOI:https://doi.org/10.1002/2016JA022470· OSTI ID:1327076
 [1];  [2];  [1]; ORCiD logo [1];  [1]; ORCiD logo [1];  [3]
  1. Space Science and Applications Los Alamos National Laboratory Los Alamos New Mexico USA
  2. Space Science and Applications Los Alamos National Laboratory Los Alamos New Mexico USA, Department of Physics and Astronomy West Virginia University Morgantown West Virginia USA
  3. Department of Physics and Astronomy University of Iowa Iowa City Iowa USA
+ Show Author Affiliations

Abstract Mechanisms for electron injection, trapping, and loss in the near‐Earth space environment are investigated during the October 2012 “double‐dip” storm using our ring current‐atmosphere interactions model with self‐consistent magnetic field (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 Polar‐orbiting Operational Environmental Satellites (POES) and Van Allen Probes Electric and Magnetic Field Instrument Suite and Integrated Science observations. The dynamics of the source (approximately tens of keV) and seed (approximately hundreds of keV) populations of the radiation belts simulated with RAM‐SCB is compared with Van Allen Probes Magnetic Electron Ion Spectrometer 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 precipitating fluxes simulated with RAM‐SCB are weaker, and their temporal and spatial evolutions agree well with POES/Medium Energy Proton and Electron Detectors data.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1327076
Alternate ID(s):
OSTI ID: 1325645; OSTI ID: 1327436
Report Number(s):
LA-UR-16-20660
Journal Information:
Journal of Geophysical Research. Space Physics, Journal Name: Journal of Geophysical Research. Space Physics Vol. 121 Journal Issue: 9; ISSN 2169-9380
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 33 works
Citation information provided by
Web of Science

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58 GEOSCIENCES
Heliospheric and Magnetospheric Physics