Jean-Francois Ripoll, Vivien Loridan, Michael H. Denton, Gregory Cunningham, G. Reeves, O. Santolik, Joseph Fennell, Drew L. Turner, Alexander Drozdov, Juan Sebastian Cervantes Villa, Yuri Shprits, Scott A. Thaller, William S. Kurth, Craig A. Kletzing, Michael G. Henderson, Aleksandr Y. Ukhorskiy
- The evolution of the radiation belts in L-shell (L), energy (E), and equatorial pitch angle (alpha(0)) is analyzed during the calm 11-day interval (4-15 March) following the 1 March 2013 storm. Magnetic Electron and Ion Spectrometer (MagEIS) observations from Van Allen Probes are interpreted alongside 1D and 3D Fokker-Planck simulations combined with consistent event-driven scattering modeling from whistler mode hiss waves. Three (L, E, alpha(0)) regions persist through 11 days of hiss wave scattering; the pitch angle-dependent inner belt core (L similar to <2.2 and E < 700 keV), pitch angle homogeneous outer belt low-energy core (L > similar to 5 and E similar to < 100 keV), and a distinct pocket of electrons (L similar to [4.5, 5.5] and E similar to [0.7, 2] MeV). The pitch angle homogeneous outer belt is explained by the diffusion coefficients that are roughly constant for alpha(0) similar to <60 degrees, E > 100 keV, 3.5 < L < L-pp similar to 6. Thus, observed unidirectional flux decays can be used to estimate local pitch angleThe evolution of the radiation belts in L-shell (L), energy (E), and equatorial pitch angle (alpha(0)) is analyzed during the calm 11-day interval (4-15 March) following the 1 March 2013 storm. Magnetic Electron and Ion Spectrometer (MagEIS) observations from Van Allen Probes are interpreted alongside 1D and 3D Fokker-Planck simulations combined with consistent event-driven scattering modeling from whistler mode hiss waves. Three (L, E, alpha(0)) regions persist through 11 days of hiss wave scattering; the pitch angle-dependent inner belt core (L similar to <2.2 and E < 700 keV), pitch angle homogeneous outer belt low-energy core (L > similar to 5 and E similar to < 100 keV), and a distinct pocket of electrons (L similar to [4.5, 5.5] and E similar to [0.7, 2] MeV). The pitch angle homogeneous outer belt is explained by the diffusion coefficients that are roughly constant for alpha(0) similar to <60 degrees, E > 100 keV, 3.5 < L < L-pp similar to 6. Thus, observed unidirectional flux decays can be used to estimate local pitch angle diffusion rates in that region. Top-hat distributions are computed and observed at L similar to 3-3.5 and E = 100-300 keV.…
MetadatenAuthor details: | Jean-Francois RipollORCiD, Vivien LoridanORCiD, Michael H. DentonORCiD, Gregory CunninghamORCiD, G. Reeves, O. Santolik, Joseph FennellORCiD, Drew L. TurnerORCiD, Alexander DrozdovORCiDGND, Juan Sebastian Cervantes VillaORCiDGND, Yuri ShpritsORCiDGND, Scott A. ThallerORCiD, William S. KurthORCiD, Craig A. KletzingORCiD, Michael G. HendersonORCiD, Aleksandr Y. UkhorskiyORCiD |
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DOI: | https://doi.org/10.1029/2018JA026111 |
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ISSN: | 2169-9380 |
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ISSN: | 2169-9402 |
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Title of parent work (English): | Journal of geophysical research : Space physics |
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Publisher: | American Geophysical Union |
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Place of publishing: | Washington |
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Publication type: | Article |
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Language: | English |
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Date of first publication: | 2018/12/08 |
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Publication year: | 2019 |
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Release date: | 2021/04/12 |
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Tag: | electron lifetime; hiss waves; pitch angle diffusion coefficient; radiation belts; wave-particle interactions |
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Volume: | 124 |
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Issue: | 2 |
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Number of pages: | 18 |
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First page: | 1125 |
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Last Page: | 1142 |
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Funding institution: | CEA/DAMFrench Atomic Energy Commission; NNSA/DP on cooperation on fundamental science; APL contract to UMN [922613]; NASANational Aeronautics & Space Administration (NASA) [NAS5-01072]; NASA Living With A Star [NNX16AB83G, NNX16AB75G, 80NSSC17K0682, LTAUSA17070]; Praemium Academiae award |
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Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Geowissenschaften |
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DDC classification: | 5 Naturwissenschaften und Mathematik / 55 Geowissenschaften, Geologie / 550 Geowissenschaften |
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Peer review: | Referiert |
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