Journal article
Parametrization of Energetic Ion and Electron Fluxes in the Near-Earth Magnetotail
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, v 128(9), e2023JA031425
Sep 2023
Abstract
The near-Earth plasma sheet region is the main source of energetic (tens to hundreds keV) ion and electron populations transported by convection and injections into the inner magnetosphere. Energetic ions from the plasma sheet contribute to the ring current, whereas energetic electrons contribute to the radiation belt seed population for further acceleration to relativistic energies. Near-Earth plasma sheet energetic fluxes have been traditionally used to set boundary conditions for radiation belt and ring current models. This study provides an empirical parametrization for similar to 75 keV flux intensity as a function of the geomagnetic activity index auroral electrojet and the equatorial magnetic field B-z. Such parametrization includes the dynamic magnetic field configuration in the near-Earth plasma sheet and may be merged with empirical magnetic field models. We also provide models extending this parametrization to the [20, 300] keV of electron energy range and [75, 300] keV of ion energy range. The parametrization is developed based on THEMIS and Geostationary Operational Environmental Satellite measurements, and verified by comparison with MMS measurements in the near-Earth plasma sheet. This parametrization incorporates meso-scale transient flux variations associated with B-z perturbations into ring current and radiation belt simulations.
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Details
- Title
- Parametrization of Energetic Ion and Electron Fluxes in the Near-Earth Magnetotail
- Publication Details
- JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, v 128(9), e2023JA031425
- Publisher
- AMER GEOPHYSICAL UNION; WASHINGTON
- Grant note
- We acknowledge support by NASA awards 80NSSC20K1578, 80NSSC23K0089 (L.G., D.L.V., A.V.A.), 80NSSC20K1402 (A.C.K.), 80NSSC20K1790 (G.C.), NSF grants AGS 1938599 (G.C.) and 2149782 (A.V.A., A.C.K.). We acknowledge support of NASA contract NAS5-02099 for use of data from the THEMIS Mission (A.V.A., A.R.).
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Drexel University
- Web of Science ID
- WOS:001066751900001
- Scopus ID
- 2-s2.0-85170831397
- Other Identifier
- 991021861286904721
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- Collaboration types
- Industry collaboration
- Domestic collaboration
- Web of Science research areas
- Astronomy & Astrophysics